The Efficiency of the VSI Exponentially Weighted Moving Average Median Control Chart
|
|
- Rolf Hall
- 5 years ago
- Views:
Transcription
1 The Efficiency of the VSI Exponentially Weighted Moving Average Median Control Chart Kim Phuc Tran, Philippe Castagliola, Thi-Hien Nguyen, Anne Cuzol To cite this version: Kim Phuc Tran, Philippe Castagliola, Thi-Hien Nguyen, Anne Cuzol The Efficiency of the VSI Exponentially Weighted Moving Average Median Control Chart 24th ISSAT International Conference on Reliability and Quality in Design, Aug 2018, Toronto, Canada <hal > HAL Id: hal Submitted on 10 Sep 2018 HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not The documents may come from teaching and research institutions in France or abroad, or from public or private research centers L archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d enseignement et de recherche français ou étrangers, des laboratoires publics ou privés
2 The Efficiency of the VSI Exponentially Weighted Moving Average Median Control Chart Kim Phuc Tran 1, Philippe Castagliola 2, Thi Hien Nguyen 1, and Anne Cuzol 1 1 Laboratoire de Mathématiques de Bretagne Atlantique, UMR CNRS 6205, Université de Bretagne-Sud, Vannes, France 2 Université de Nantes & LS2N UMR CNRS 6004, Nantes, France May 14, 2018 Abstract In the literature, median type control charts have been widely investigated as easy and efficient means to monitor the process mean when observations are from a normal distribution In this work, a Variable Sampling Interval (VSI) Exponentially Weighted Moving Average (EWMA) median control chart is proposed and studied A Markov chain method is used to obtain optimal designs and evaluate the statistical performance of the proposed chart Furthermore, practical guidelines and comparisons with the basic EWMA median control chart are provided Results show that the proposed chart is considerably more efficient than the basic EWMA median control chart Finally, the implementation of the proposed chart is illustrated with an example in the food production process Keywords: EWMA, VSI, Median, Control chart, Order statistics 1 Introduction Statistical Process Control (SPC) is a method of quality control which uses statistical methods in achieving process stability and improving capability through the reduction of variability, see Montgomery [1] It s well known that control charts are the fundamental tool for SPC applications There are numerous types of control charts, the most common ones are the Shewhart control charts, the cumulative sum (CUSUM) control charts and the exponentially weighted moving average (EWMA) control charts The EWMA control charts have a built in mechanism for incorporating information from all previous subgroups by means of weights decreasing geometrically with the sample mean age Thus EWMA type control charts are very effective for the detection of small or moderate process shifts, see Tran et al [2] Their properties and design stategies have been thoroughly investigated by many authors For further details see, for instance, Robinson and Ho [3], kim-phuctran@univ-ubsfr (corresponding author) Hunter [4], Crowder [5], Lucas and Saccucci [6], Tran et al [2] to name a few In recent years, many researchers have focused on developing advanced control charts with various applications in manufacturing and service processes, for example, see Castagliola and Figueiredo [7], Huang [8], Da Costa Quinino et al [9], Tran et al [10], Castagliola et al [11], Tran [12], Tran et al [13] and Tran [14] Among these control charts, median ( X) type charts have been widely investigated as easy and efficient means to monitor the mean The main advantages of median type charts are that they are simpler than mean ( X) charts and that they are robust against outliers, contamination or small deviations from normality, see Castagliola et al [11] In the SPC literature, the EWMA median chart was introduced by Castagliola [15] (EWMA- X) with fast detection of assignable causes Then, a generally weighted moving average median (GWMA- X) control chart has been studied by Sheu and Yang [16] as a continuation to improve the statistical performance of median type control charts When the parameters are estimated, Castagliola and Figueiredo [7] and Castagliola et al [11] developed a Shewhart median chart and a EWMA- X chart, respectively, with estimated control limits to monitor the mean value of a normal process Very recently, Lin et al [17] investigated the performances of the EWMA- X control chart under several distributions As a result, the EWMA- X is always more efficient than the EWMA- X chart in detecting shifts in the process mean if the data follow a heavy-tailed distribution Finally, Tran [18] proposed and studied the Run Rules Shewhart median control charts (RR r,s X charts) It is known that, the EWMA- X control chart suggested by Castagliola [15] is a Fixed Sampling Interval (FSI) control chart By definition, an adaptive control chart involves varying at least one of the chart s parameters, such as the sampling interval or the sample size Variable Sampling Interval (VSI)
3 control charts are adaptive control charts where the sampling intervals vary as a function of what is observed from the process The VSI control charts are demonstrated to detect process changes faster than FSI control charts The idea is that the time interval until the next sample should be short, if the position of the last plotted control statistic indicates a possible out-ofcontrol situation; and long, if there is no indication of a change Most work on developing VSI control charts has been done for the problem of monitoring the mean of the process (see Reynolds [19], Reynolds et al [20] and Castagliola et al [21]) In this paper, we propose a VSI EWMA- X control chart as a logical extension of the control chart developed by Castagliola [15] The goal of this paper is to show how the VSI behaves with respect to the basic EWMA median control chart The rest of this paper proceeds as follows: in Section 2, a brief review of the FSI EWMA- X control chart is provided; Section 3 provides a VSI version of the FSI EWMA- X control chart; in Section 4, the run length performances of proposed chart are defined by using the Markov Chain-based approach; in Section 5, the computational results and the tables reporting the optimal design parameters of the VSI EWMA- X chart are presented Section 6 presents an illustrative example and, finally, some concluding remarks and recommendations are made in Section 7 2 The FSI EWMA- X control chart Let us assume that, at each sampling period i = 1,2,, we collect a sample of n independent random variables {X i,1,,x i,n } We assume that each X i, j follows a normal distribution N(µ 0 + δσ 0,σ 0 ), j = 1,,n, µ 0 is the in-control mean value, σ 0 is the in-control standard deviation and δ is the magnitude of the standardized mean shift If δ = 0 the process is in-control and, when δ 0, the process is out-of-control Let X i be the sample median of subgroup i, ie X i = X i,((n+1)/2) X i,(n/2) + X i,(n/2+1) 2 if n is odd if n is even where {X i,(1),x i,(2),,x i,(n) } is the ordered i-th subgroup In the rest of this paper, without loss of generality, we assume that the sample size n is an odd value Let Z 1,Z 2, be the EWMA sequence obtained from X 1, X 2,, ie for i {1,2,}, (1) Z i = (1 )Z i 1 + X i, (2) where Z 0 = µ 0 and (0,1] is a smoothing constant If the in-control mean value µ 0 and the standard deviation σ 0 are assumed known, the control limits of the EWMA- X chart for the median are simply equal to LCL = µ 0 K 2 σ 0, (3) UCL = µ 0 + K 2 σ 0, (4) where K > 0 is a constant that depends on n and on the desired in-control performance 3 Implementation of the VSI EWMA- X control chart In this section, a VSI version of the FSI EWMA- X control chart described in the previous section is presented (denoted as VSI EWMA- X) The control statistic Z i for the VSI EWMA- X control chart is given by (2) The upper (UCL) and lower (LCL) control limits of the VSI EWMA- X control chart can be easily calculated as: LCL = µ 0 K 2 σ 0, (5) UCL = µ 0 + K 2 σ 0, (6) where K 0 is a constant influencing the width of the control interval For the FSI control chart, the sampling interval is a fixed value h 0 As for the VSI control chart, the sampling interval depends on the current value of Z i A longer sampling interval h L is used when the control statistic falls within region R L = [LWL,UWL] defined as: LWL = µ 0 W 2 σ 0, (7) UWL = µ 0 +W 2 σ 0, (8) where W is the warning limit coefficient of the VSI EWMA X control chart that determines the proportion of times that the control statistic falls within the long and short sampling regions On the other hand, the short sampling interval h S is used when the control statistic falls within the region R S = [LCL,LWL) (UWL,UCL] The process is considered out-ofcontrol and action should be taken whenever Z i falls outside the range of the control limits [LCL,UCL] In order to evaluate the ARL and SDRL of the VSI EWMA- X control chart, we follow the discrete Markov chain approach originally proposed by Brook and Evans [22] In Appendix, the discrete Markov chain approach for VSI EWMA- X control chart is provided 4 Optimal design of the VSI EWMA- X control chart In the literature, the Average Run Length (ARL), defined as the average number of samples before the control chart signals an out-of-control condition or issues a false alarm, and the Average Time to Signal (AT S), which is the expected value of the time between the occurrence of a special cause and a signal from the chart are used as the performance measures of control charts, see Castagliola et al [21] It is well known that, when
4 the process is in-control, it is better to have a large AT S, since in this operating condition a signal represents a false alarm (in this case, the AT S will be denoted as AT S 0 ) On the other hand, after the parameter of the process under control has shifted, it is preferable to have an AT S that is as small as possible (in this case, the AT S will be denoted as AT S 1 ) For a FSI model, the AT S is a multiple of the ARL since the sampling interval h F is fixed Thus, in this case we have the following expression: AT S FSI = h F ARL FSI (9) For a VSI model, the AT S is defined as: AT S VSI = E(h) ARL VSI (10) where E(h) is the expected sampling interval value According to Castagliola et al [21], for VSI type control charts, we need to define them with the same in-control ARL = ARL 0 and the same in-control average sampling interval E 0 (h) For FSI-type control charts, the sampling interval is set equal to h S = h L = h F = 1 time units Then, the in-control expected sampling interval of the VSI chart is set equal to E 0 (h) = 1 time unit to ensure AT S 0 = ARL 0 time unit for both FSI and VSI type control charts The value of h S represents the shortest feasible time interval between subgroups from the process, see Castagliola et al [21] for more details Then, in this paper we will consider the impact on the expected time until detection, using small but non-zero values of h S The design procedure of VSI EWMA- X control chart is implemented by finding out the optimal combination of parameters, K and h L which minimize the out-of-control AT S for predefined values of δ, W, h S, n and AT S 0, ie, the optimization scheme of the VSI EWMA- X consists in finding the optimal parameters, K and h L such that (,K,h L) = argminat S(n,,K,W,h L,h S,δ) (11) (,K,h L ) subject to the constraint E 0 (h) = 1, AT S(n,,K,W,h L,h S,δ = 0) = AT S 0 (12) Similar to Tran and Tran [23], the choice of the optimal combination of parameters generally entails two steps: 1 Find the potential combinations (,K,h L ) such that AT S = AT S 0 and E 0 (h) = 1 2 Choose, among these potential combinations (,K,h L ), the one (,K,h L ) that allows for the best performance, ie the smallest out-of-control AT S value for a particular shift δ In this study, like in Tran and Tran [23], in order to find these optimal combinations (,K,h L ) we simultaneously use a non-linear equation solver coupled to an optimization algorithm (developed with Scicoslab software) 5 Numerical results Optimal designs were obtained for the FSI and VSI EWMA X control charts, for all combinations of δ [05, 2] and n = {3,5,7,9} The sampling interval h F of the FSI charts has been set equal to 1 time unit The shorter time interval h S can assume the following values: 05 and 01 time units The optimal combinations of design parameters (,K,h L ) have been selected by constraining the in-control AT S at the value AT S 0 = 3704 and the in-control expected sampling interval of the VSI chart is set equal to E 0 (h) = 1 To ensure a fair comparison, the ARL 0 of EWMA- X chart is set as 3704 The optimal combinations of design parameters (,K,h L ) of the VSI EWMA- X control chart are presented in Tables 1-4 Some simple conclusions can be drawn from Tables 1-4: n = 3 h S = 05 δ W = 09 W = 06 W = 03 W = 02 W = (00500,16686) (00500,16686) (00500,16686) (00513,16750) (00514,16750) (108,1395) (124,1359) (181,1338) (254,1347) (468,1359) 02 (00500,16686) (00500,16686) (00500,16686) (00500,16686) (00514,16750) (108,500) (124,473) (181,462) (240,464) (468,486) 03 (00514,16750) (00518,16767) (00500,16686) (00517,16763) (00535,1684) (109,261) (126,246) (181,243) (255,249) (468,269) 05 (00989,18090) (01095,18273) (01073,18234) (01046,18190) (01124,18315) (110,118) (128,112) (189,114) (246,118) (449,138) 07 (01605,18883) (01690,18957) (01563,18844) (01742,19000) (01798,19043) (110,69) (128,67) (187,70) (258,76) (439,94) 10 (02743,19557) (02773,19569) (02759,19563) (02783,19572) (02885,19609) (110,40) (129,39) (191,44) (254,50) (431,68) 15 (04746,20017) (04681,20008) (04685,20008) (04745,20016) (04293,19950) (110,22) (128,23) (189,29) (251,35) (426,52) 20 (06883,20195) (06890,20196) (05499,20100) (05498,20100) (04293,19950) (111,16) (130,17) (189,23) (250,29) (426,47) h S = 01 δ W = 09 W = 06 W = 03 W = 02 W = (00500,16686) (00500,16686) (00500,16686) (00500,16686) (00500,16686) (115,1342) (144,1277) (247,1240) (352,1239) (652,1255) 02 (00500,16686) (00500,16686) (00500,16685) (00500,16686) (00500,16686) (115,448) (144,400) (247,380) (352,385) (652,410) 03 (00515,16752) (00515,16753) (00577,1701) (00502,16693) (00643,17240) (115,221) (146,194) (257,190) (351,198) (753,234) 05 (00987,18090) (01140,18339) (01278,18530) (01325,18589) (01394,18669) (117,93) (150,83) (259,85) (390,96) (719,128) 07 (01737,18995) (01952,19154) (02088,19241) (02142,19273) (02269,19344) (118,53) (150,48) (267,54) 381,65) (702,96) 10 (03086,19676) (03239,19721) (03326,19746) (03415,19769) (03661,19829) (119,30) (152,29) (263,37) (374,48) (690,79) 15 (05211,20072) (05218,20072) (05366,20087) (05498,20100) (04025,19903) (118,17) (150,19) (259,29) (370,40) (688,72) 20 (07043,20203) (05498,20100) (05498,20100) (05498,20100) (04025,19903) (119,13) (150,16) (259,27) (370,38) (688,70) Table 1: Optimal couples (,K ) (first row of each block) and values of (h L,AT S 1 )(second row of each block) of the VSI EWMA- X control chart for n = 3 Given the values of δ, n and W, the value of AT S depends on h S In particular, with smaller values of h S, the value of AT S 1 decreases For example, when δ = 01, n = 3, W = 06 we have AT S 1 = 1359 for h S = 05 and AT S 1 = 1277 for h S = 01, see Table 1 For a defined value of h S, it is obvious that when W decreases the length of the long sampling interval h L increases For example, when δ = 01, n = 3, h S = 05 we have h L = 108 for W = 09 and h L = 468 for W = 01, see Table 1
5 The VSI EWMA- X control chart is directly compared to the FSI EWMA- X control chart, to evaluate the impact of the adaptive feature on the statistical performance of the original static chart As expected, the results in Tables 1-4 clearly indicate that the VSI EWMA- X chart is superior to the FSI EWMA- X control chart For example, when δ = 01, n = 3, W = 06 and h S = 05 we have AT S 1 = 1359 for VSI EWMA- X chart and ARL = 1461 for FSI EWMA- X control chart, see Table 3 in Castagliola [15] n = 5 h S = 05 δ W = 09 W = 06 W = 03 W = 02 W = (00500,13341) (00500,13341) (00500,13341) (00500,13341) (00500,13341) (103,1061) (114,1014) (160,980) (205,977) (360,986) 02 (00500,13341) (00500,13341) (00500,13341) (00500,13341) (00500,13341) (103,367) (114,337) (160,321) (205,323) (360,336) 03 (006134,13705) (00619,13719) (00689,13899) (00710,13951) (00733,14002) (104,196) (115,179) (163,173) (211,176) (353,189) 05 (01290,14828) (01388,14921) (01467,14989) (01483,15002) (01526,15036) (104,88) (116,81) (163,80) (215,84) (383,100) 07 (02175,15423) (02304,15479) (02325,15487) (02264,15462) (02400,15517) (105,51) (117,48) (165,50) (212,54) (376,70) 10 (03773,15869) (03721,15860) (03662,15850) (03684,15854) (03804,15874) (105,30) (117,28) (164,32) (221,37) (371,52) 15 (06405,16119) (06369,16117) (06400,16119) (06450,16121) (06579,16127) (105,17) (117,17) (168,22) (219,27) (367,42) 20 (08517,16182) (08540,16182) (08594,16183) (08634,16184) (08728,16185) (105,12) (117,13) (167,18) (219,23) (366,38) h S = 01 δ W = 09 W = 06 W = 03 W = 02 W = (00500,13341) (00500,13341) (00500,13341) (00500,13341) (00500,13341) (106,1027) (125,943) (208,881) (289,876,,3704) (569,891) 02 (00500,13341 (00516,13402) (00500,13341) (00500,13341) (00500,13341) (106,337) (127,282,,3704) (208,255) (289,258,,3704) (569,282) 03 (00695,13915) (00644,13788) (00791,14124) (00837,14212) (00772,14085) (107,172) (127,142) (211,130) (297,135) (553,158) 05 (01573,15075) (01586,15082) (01543,15050) (01799,15225) (01902,15286) (108,72) (131,60) (212,59) (305,66) (603,94) 07 (02618,15596) (02629,15598) (02784,15647) (02264,15462) (03018,15711) (109,41) (131,35) (216,38) (302,46) (592,74) 10 (04059,15914) (04240,15939) (03768,15868) (04404,15960) (04721,15996) (109,23) (132,21) (214,27) (317,37) (584,64) 15 (06616,16129) (06621,16129) (03768,15868) (07056,16146) (07466,16159) (109,14) (131,15) (214,23) (314,33) (579,59) 20 (08505,16182) (08649,16184) (03768,15868) (09103,16189) (09343,16191) (109,11) (131,13) (214,22) (313,32) (579,58) Table 2: Optimal couples (,K ) (first row of each block) and values of (h L,AT S 1 ) (second row of each block) of the VSI EWMA- X control chart for n = 5 n = 7 h S = 05 δ W = 09 W = 06 W = 03 W = 02 W = (00500,11427) (00500,11427) (00500,11427) (00500,11427) (00500,11427) (101,870) (109,818) (146,775) (188,770) (325,777) 02 (00507,11449) (00500,11427) (00500,11427) (00500,11427) (00505,11443) (101,302) (109,270) (146,253) (188,254) (325,265) 03 (00870,12223) (00767,12060) (00860,12208) (00886,12247) (00913,12286) (102,162) (110,144) (149,136) (191,139) (315,149) 05 (01593,12921) (01723,12998) (01819,13049) (01831,13055) (01873,13076) (102,72) (111,65) (149,63) (194,66) (337,80) 07 (02678,13370) (02845,13412) (02847,13413) (02788,13398) (02912,13428) (102,42) (112,38) (151,39) (191,43) (332,57) 10 (04864,13705) (04590,13681) (04507,13673) (04527,13675) (04646,13686) (103,24) (111,23) (150,26) (198,30) (328,43) 15 (07609,13831) (07604,13831) (07643,13831) (07679,13832) (07766,13834) (102,14) (112,14) (153,18) (197,23) (326,35) 20 (09354,13853) (09377,13853) (09419,13853) (09448,13853) (09513,13854) (102,11) (112,12) (153,16) (197,20) (325,33) h S = 01 δ W = 09 W = 06 W = 03 W = 02 W = (00500,11427) (00500,11427) (00500,11427) (00500,11427) (00500,11427) (102,852) (117,758) (182,681) (259,672) (505,685) 02 (00557,11596) (00500,11427) (00505,11443) (00553,11583) (00599,11702) (103,286) (117,229) (182,197) (257,198) (499,218) 03 (00870,12224) (00927,12306) (00986,12383) (01046,12455) (00996,12395) (103,148) (119,115) (187,101) (261,104) (484,123) 05 (01593,12921) (01946,13111) (02161,13201) (02212,13221) (02330,13264) (104,62) (120,49) (194,46) (267,51) (522,76) 07 (03249,13500) (03204,13491) (03368,13521) (03426,13532) (03617,13563) (104,36) (121,29) (191,30) (279,38) (514,61) 10 (04890,13707) (05066,13721) (04709,13692) (05203,13731) (05548,13753) (105,20) (121,18) (190,23) (276,31) (508,54) 15 (07655,13832) (07675,13832) (04709,13692 (08106,13840) (08430,13845) (104,12) (121,13) (190,20) (274,28) (506,51) 20 (09324,13853) (09459,13853) (04709,13692) (00626,11768) (09825,13854) (104,11) (121,12) (190,19) (256,27) (506,51) Table 3: Optimal couples (,K ) (first row of each block) and values of (h L,AT S 1 ) (second row of each block) of the VSI EWMA- X control chart for n = 7 n = 9 h S = 05 δ W = 09 W = 06 W = 03 W = 02 W = (00500,10152) (00500,10152) (00500,10152) (00500,10152) (00500,10152) (100,744) (106,694) (138,643) (175,637) (297,642) 02 (00548,10279) (00524,10220) (00540,10258) (00569,10330) (00598,10395) (101,263) (106,231) (137,212) (174,212) (294,221) 03 (01013,11030)) (00954,10964) (01017,11034) (01048,11066) (01077,11096) (101,141)) (107,123) (139,114) (176,115) (285,124) 05 (01878,11617) (02030,11679) (02141,11719) (02145,11720) (02182,11733) (101,63) (108,55) (142,53) (178,55) (303,67) 07 (03139,11970) (03334,12003) (03318,12000 (02408,11804) (03367,12008) (101,37) (108,33) (141,33) (177,37) (299,48) 10 (05404,12203,) (05410,12203) (05335,12199) (05354,12200) (05456,12206) (101,21) (108,20) (143,22) (181,26) (296,37) 15 (08434,12289) (08442,12289) (08480,12289) (08507,12289) (08570,12290) (101,12) (108,12) (142,16) (181,20) (294,31) 20 (09757,12297) (09772,12297) (09802,12297) (09822,12297) (09859,12297) (101,10) (108,11) (142,14) (180,18) (294,30) h S = 01 δ W = 09 W = 06 W = 03 W = 02 W = (00504,10163) (00500,10152) (00500,10152) (00500,10152) (00500,10152) (101,736) (111,647) (168,556) (236,544) (455,554) 02 (00599,10397) (00598,10397) (00599,10398) (00649,10501) (00711,10616) (101,254) (111,199) (171,163) (232,162) (445,179) 03 (01014,11031) (00964,10975) (01171,11183) (01106,11124) (01027,11044) (101,132) (113,100) (175,83,) (236,85) (435,103) 05 (02224,11747) (02192,11737) (02524,11836) (02359,11789) (02701,11880) (102,56) (113,43) (175,38) (239,43) (461,64) 07 (03240,11987) (03737,12060) (03496,12028) (03916,12082) (04117,12104) (102,33) (115,25) (26,10) (248,32) (455,52) 10 (05801,12223) (05775,12221) (05783,12222) (05896,12227) (06235,12240) (102,18) (114,16) (177,20) (246,27) (451,47) 15 (08417,12289) (08441,12289) (08686,12291) (08829,12292) (09070,12294) (102,11) (114,12) (176,18) (245,25) (450,45) 20 (09741,12297) (09868,12297) (03496,12028) (09941,12297) (09967,12297) (102,10) (114,11) (173,17) (09245,25) (450,45) Table 4: Optimal couples (,K ) (first row of each block) and values of (h L,AT S 1 ) (second row of each block) of the VSI EWMA- X control chart for n = 9 6 Illustrative example In this Section, we discuss the implementation of the VSI EWMA- X chart The context of the example presented here is similar as the one introduced in Castagliola et al [11], ie, a production process of 500 ml milk bottles where the quality characteristic X of interest is the capacity (in ml) of each bottle Like in Castagliola et al [11], we have µ 0 = and σ 0 = In fact, according to the process engineer experience, a shift δ = 05 should be interpreted as a signal that something is going wrong in the production process Thus, for n = 5, δ = 05 and AT S 0 = 3704 the VSI EWMA- X parameters are chosen to be h S = 05, h L = 163, = 01467, K = and W = 03 This yields the following control limits for the VSI EWMA- X chart: LCL = = , UCL = = and the warning control limits for the VSI EWMA- X chart: LWL = = , UWL = = The first 10 subgroups are supposed to be in-control while the last 10 subgroups are supposed to have a lower milk capacity, and thus, to be out-of-control The corresponding sample median values X i and the EWMA sequence Z i for VSI EWMA- X
6 control chart are both presented in Table 5 and plotted in Figure 1 This figure confirms that from sample #15 onwards, the process is clearly out-of-control Zi Sampling interval Total time Phase II (X i, j) X i Z i Table 5: Illustrative Phase II dataset VSI EWMA- X chart t UCL UWL LWL LCL Figure 1: VSI EWMA- X control chart corresponding to Phase II data set in Table 5 7 Concluding remarks In this paper, we have investigated a VSI EWMA- X control chart for monitoring process median We have also studied the statistical properties of the VSI EWMA- X control chart and optimized their parameters for several shift sizes For fixed values of the shift size δ, several tables are provided for presenting the out-of-control AT S 1 corresponding to many different scenarios Also, the numerical comparison with the performance of the EWMA- X control chart proposed by Castagliola [15] shows that the detection ability of the proposed control chart are better than the EWMA- X control chart Thus, the proposed chart can be used as a best alternative method Finally, possible enhancements and future work about VSI EWMA- X control chart include the investigation of the effect of the parameters estimation and of the measurement errors on their statistical properties Appendix The Markov chain approach of Brook and Evans [22] and Lucas and Saccucci [6] is modified to evaluate the Run Length properties of the VSI EWMA- X chart This procedure involves dividing dividing the interval [LCL,UCL] into 2m + 1 subintervals (H j,h j + ], j { m,,0,,+m}, centered at H j = LCL+UCL j where 2 = UCL LCL (2m+1) Each subinterval (H j,h j + ], j { m,,0,,+m}, represents a transient state of a Markov chain If Z i (H j,h j + ] then the Markov chain is in the transient state j { m,,0,,+m} for sample i If Z i (H j,h j + ] then the Markov chain reached the absorbing state (, LCL] [UCL, + ) We assume that H j is the representative value of state j { m,,0,,+m} Let Q be the (2m + 1,2m + 1) sub-matrix of probabilities Q j,k corresponding to the 2m + 1 transient states defined above, ie Q m, m Q m, 1 Q m,0 Q m,+1 Q m,+m Q 1, m Q 1, 1 Q 1,0 Q 1,+1 Q 1,+m Q = Q 0, m Q 0, 1 Q 0,0 Q 0,+1 Q 0,+m Q +1, m Q +1, 1 Q +1,0 Q +1,+1 Q +1,+m Q +m, m Q +m, 1 Q +m,0 Q +m,+1 Q +m,+m By definition, we have Q j,k = P(Z i (H k,h k + ] Z i 1 = H j ) or, equivalently, Q j,k = P(Z i H k + Z i 1 = H j ) P(Z i H k Z i 1 = H j ) Replacing Z i = (1 )Z i 1 + X i, Z i 1 = H j and isolating X i gives ( Q j,k = P X i H ) ( k + (1 )H j P X i H ) k (1 )H j, ( ) ( Hk + (1 )H j = F X n Hk (1 )H j F X ), n where F X ( n) is the cdf (cumulative distribution function) of the sample median X i, i {1,2,}, ie F X (y n) = F β ( ( y µ0 Φ σ 0 δ ) n + 1 2, n ), (13) where Φ(x) is the cdf of the standard normal distribution and F β (x a,b) is the cdf of the beta distribution with parameters (a,b) Here a = b = n+1 2 Let q = (q m,,q 0,,q m ) T be the (2m + 1, 1) vector of initial probabilities associated with the 2m + 1 transient states, where { 0 if Z0 (H q j = j,h j + ] 1 if Z 0 (H j,h j + ] (14) The AT S 1 can be evaluated through the following expression: AT S 1 = q T (I Q) 1 g (15) where g is the vector of sampling intervals corresponding to the discretized states of the Markov chain and the jth element g j of the vector g is the sampling interval when the control statistic is in state j (represented by H j ), ie { hl if LWL H g j = j UWL, (16) otherwise h S
7 The average sampling interval of the VSI EWMA- X chart is given as: E(h) = qt (I Q) 1 g q T (I Q) 1 (17) 1 References [1] DC Montgomery Statistical Quality Control: A Modern Introduction, 7th Edn John Wiley& Sons, Hoboken, New Jersey, 2013 [2] KP Tran, P Castagliola, and G Celano Monitoring the Ratio of Two Normal Variables Using EWMA Type Control Charts Quality and Reliability Engineering International, 32(2): , 2016 [3] PB Robinson and TY Ho Average Run Lengths of Geometric Moving Average Charts by Numerical Methods Technometrics, 20(1):85 93, 1978 [4] JS Hunter The Exponentially Weighted Moving Average Journal of Quality Technology, 18: , 1986 [5] SV Crowder A Simple Method for Studying Run-Length Distributions of Exponentially Weighted Moving Average Charts Technometrics, 29(4): , 1987 [6] JM Lucas and MS Saccucci Exponentially Weighted Moving Average Control Schemes: Properties and Enhancements Technometrics, 32(1):1 12, 1990 [7] P Castagliola and FO Figueiredo The Median Chart with Estimated Parameters European Journal of Industrial Engineering, 7(5): , 2013 [8] CC Huang Max control chart with adaptive sample sizes for jointly monitoring process mean and standard deviation Journal of the Operational Research Society, 65 (12): , 2014 [9] E Da Costa Quinino, L L LL Ho, and A L G Trindade Monitoring the process mean based on attribute inspection when a small sample is available Journal of the Operational Research Society, 66(11): , 2015 [10] KP Tran, P Castagliola, and G Celano Monitoring the Ratio of Population Means of a Bivariate Normal distribution using CUSUM Type Control Charts Statistical Papers, 2016 In press, DOI: /s [11] P Castagliola, P E Maravelakis, and F O Figueiredo The EWMA Median chart with estimated parameters IIE Transactions, 48(1):66 74, 2016 [12] KP Tran The efficiency of the 4-out-of-5 Runs Rules scheme for monitoring the Ratio of Population Means of a Bivariate Normal distribution International Journal of Reliability, Quality and Safety Engineering, 23(5):1 26, 2016 [13] KP Tran, P Castagliola, G Celano, and MBC Khoo Monitoring compositional data using multivariate exponentially weighted moving average scheme Quality and Reliability Engineering International, 2017 In press, DOI: /qre2260 [14] KP Tran Designing of Run Rules t control charts for monitoring changes in the process mean Chemometrics and Intelligent Laboratory Systems, 2018 In press, DOI: /jchemolab [15] P Castagliola An X/R-EWMA Control Chart For Monitoring the Process Sample Median International Journal of Reliability, Quality and Safety Engineering, 8(2): , 2001 [16] SH Sheu and L Yang The Generally Weighted Moving Average Control Chart for Monitoring the Process Median Quality Engineering, 18(3): , 2006 [17] YC Lin, CY Chou, and CH Chen Robustness of the EWMA median control chart to non-normality International Journal of Industrial and Systems Engineering, 25 (1):35 58, 2017 [18] KP Tran Run Rules median control charts for monitoring process mean in manufacturing Quality and Reliability Engineering International, 33(8): , 2017 [19] MR Reynolds Shewhart and EWMA variable sampling interval control charts with sampling at fixed times Journal of Quality Technology, 28(2): , 1996 [20] MR Reynolds, RW Amin, JC Arnold, and JA Nachlas Charts with variable sampling intervals Technometrics, 30(2): , 1988 [21] P Castagliola, G Celano, S Fichera, and F Giuffrida A variable sampling interval s 2 -EWMA control chart for monitoring the process variance International Journal of Technology Management, 37(1-2): , 2006 [22] D Brook and DA Evans An Approach to the Probability Distribution of CUSUM Run Length Biometrika, 59 (3): , 1972 [23] PH Tran and K P Tran The Efficiency of CUSUM schemes for monitoring the Coefficient of Variation Stochastic Models in Business and Industry, 2016 In press, DOI: /asmb2213
The Efficiency of the 4-out-of-5 Runs Rules Scheme for monitoring the Ratio of Population Means of a Bivariate Normal distribution
Proceedings of the 22nd ISSAT International Conference on Reliability and Quality in Design August 4-6, 2016 - Los Angeles, California, U.S.A. The Efficiency of the 4-out-of-5 Runs Rules Scheme for monitoring
More informationTHE CUSUM MEDIAN CHART FOR KNOWN AND ESTIMATED PARAMETERS
THE CUSUM MEDIAN CHART FOR KNOWN AND ESTIMATED PARAMETERS Authors: Philippe Castagliola Université de Nantes & LS2N UMR CNRS 6004, Nantes, France (philippe.castagliola@univ-nantes.fr) Fernanda Otilia Figueiredo
More informationMethylation-associated PHOX2B gene silencing is a rare event in human neuroblastoma.
Methylation-associated PHOX2B gene silencing is a rare event in human neuroblastoma. Loïc De Pontual, Delphine Trochet, Franck Bourdeaut, Sophie Thomas, Heather Etchevers, Agnes Chompret, Véronique Minard,
More informationFull-order observers for linear systems with unknown inputs
Full-order observers for linear systems with unknown inputs Mohamed Darouach, Michel Zasadzinski, Shi Jie Xu To cite this version: Mohamed Darouach, Michel Zasadzinski, Shi Jie Xu. Full-order observers
More informationThe FLRW cosmological model revisited: relation of the local time with th e local curvature and consequences on the Heisenberg uncertainty principle
The FLRW cosmological model revisited: relation of the local time with th e local curvature and consequences on the Heisenberg uncertainty principle Nathalie Olivi-Tran, Paul M Gauthier To cite this version:
More informationA new simple recursive algorithm for finding prime numbers using Rosser s theorem
A new simple recursive algorithm for finding prime numbers using Rosser s theorem Rédoane Daoudi To cite this version: Rédoane Daoudi. A new simple recursive algorithm for finding prime numbers using Rosser
More informationJumps in binomial AR(1) processes
Jumps in binomial AR1 processes Christian H. Weiß To cite this version: Christian H. Weiß. Jumps in binomial AR1 processes. Statistics and Probability Letters, Elsevier, 009, 79 19, pp.01. .
More informationEvolution of the cooperation and consequences of a decrease in plant diversity on the root symbiont diversity
Evolution of the cooperation and consequences of a decrease in plant diversity on the root symbiont diversity Marie Duhamel To cite this version: Marie Duhamel. Evolution of the cooperation and consequences
More informationThomas Lugand. To cite this version: HAL Id: tel
Contribution à la Modélisation et à l Optimisation de la Machine Asynchrone Double Alimentation pour des Applications Hydrauliques de Pompage Turbinage Thomas Lugand To cite this version: Thomas Lugand.
More informationSmart Bolometer: Toward Monolithic Bolometer with Smart Functions
Smart Bolometer: Toward Monolithic Bolometer with Smart Functions Matthieu Denoual, Gilles Allègre, Patrick Attia, Olivier De Sagazan To cite this version: Matthieu Denoual, Gilles Allègre, Patrick Attia,
More informationL institution sportive : rêve et illusion
L institution sportive : rêve et illusion Hafsi Bedhioufi, Sida Ayachi, Imen Ben Amar To cite this version: Hafsi Bedhioufi, Sida Ayachi, Imen Ben Amar. L institution sportive : rêve et illusion. Revue
More informationCompleteness of the Tree System for Propositional Classical Logic
Completeness of the Tree System for Propositional Classical Logic Shahid Rahman To cite this version: Shahid Rahman. Completeness of the Tree System for Propositional Classical Logic. Licence. France.
More informationVibro-acoustic simulation of a car window
Vibro-acoustic simulation of a car window Christophe Barras To cite this version: Christophe Barras. Vibro-acoustic simulation of a car window. Société Française d Acoustique. Acoustics 12, Apr 12, Nantes,
More informationEaster bracelets for years
Easter bracelets for 5700000 years Denis Roegel To cite this version: Denis Roegel. Easter bracelets for 5700000 years. [Research Report] 2014. HAL Id: hal-01009457 https://hal.inria.fr/hal-01009457
More informationCase report on the article Water nanoelectrolysis: A simple model, Journal of Applied Physics (2017) 122,
Case report on the article Water nanoelectrolysis: A simple model, Journal of Applied Physics (2017) 122, 244902 Juan Olives, Zoubida Hammadi, Roger Morin, Laurent Lapena To cite this version: Juan Olives,
More informationUnbiased minimum variance estimation for systems with unknown exogenous inputs
Unbiased minimum variance estimation for systems with unknown exogenous inputs Mohamed Darouach, Michel Zasadzinski To cite this version: Mohamed Darouach, Michel Zasadzinski. Unbiased minimum variance
More informationA Slice Based 3-D Schur-Cohn Stability Criterion
A Slice Based 3-D Schur-Cohn Stability Criterion Ioana Serban, Mohamed Najim To cite this version: Ioana Serban, Mohamed Najim. A Slice Based 3-D Schur-Cohn Stability Criterion. ICASSP 007, Apr 007, Honolulu,
More informationCan we reduce health inequalities? An analysis of the English strategy ( )
Can we reduce health inequalities? An analysis of the English strategy (1997-2010) Johan P Mackenbach To cite this version: Johan P Mackenbach. Can we reduce health inequalities? An analysis of the English
More informationAn Adaptive Exponentially Weighted Moving Average Control Chart for Monitoring Process Variances
An Adaptive Exponentially Weighted Moving Average Control Chart for Monitoring Process Variances Lianjie Shu Faculty of Business Administration University of Macau Taipa, Macau (ljshu@umac.mo) Abstract
More informationDispersion relation results for VCS at JLab
Dispersion relation results for VCS at JLab G. Laveissiere To cite this version: G. Laveissiere. Dispersion relation results for VCS at JLab. Compton Scattering from Low to High Momentum Transfer, Mar
More informationComparison of Harmonic, Geometric and Arithmetic means for change detection in SAR time series
Comparison of Harmonic, Geometric and Arithmetic means for change detection in SAR time series Guillaume Quin, Béatrice Pinel-Puysségur, Jean-Marie Nicolas To cite this version: Guillaume Quin, Béatrice
More informationHook lengths and shifted parts of partitions
Hook lengths and shifted parts of partitions Guo-Niu Han To cite this version: Guo-Niu Han Hook lengths and shifted parts of partitions The Ramanujan Journal, 009, 9 p HAL Id: hal-00395690
More informationPasserelle entre les arts : la sculpture sonore
Passerelle entre les arts : la sculpture sonore Anaïs Rolez To cite this version: Anaïs Rolez. Passerelle entre les arts : la sculpture sonore. Article destiné à l origine à la Revue de l Institut National
More informationAnalysis of Boyer and Moore s MJRTY algorithm
Analysis of Boyer and Moore s MJRTY algorithm Laurent Alonso, Edward M. Reingold To cite this version: Laurent Alonso, Edward M. Reingold. Analysis of Boyer and Moore s MJRTY algorithm. Information Processing
More informationA CONDITION-BASED MAINTENANCE MODEL FOR AVAILABILITY OPTIMIZATION FOR STOCHASTIC DEGRADING SYSTEMS
A CONDITION-BASED MAINTENANCE MODEL FOR AVAILABILITY OPTIMIZATION FOR STOCHASTIC DEGRADING SYSTEMS Abdelhakim Khatab, Daoud Ait-Kadi, Nidhal Rezg To cite this version: Abdelhakim Khatab, Daoud Ait-Kadi,
More informationA Simple Proof of P versus NP
A Simple Proof of P versus NP Frank Vega To cite this version: Frank Vega. A Simple Proof of P versus NP. 2016. HAL Id: hal-01281254 https://hal.archives-ouvertes.fr/hal-01281254 Submitted
More informationQuantum efficiency and metastable lifetime measurements in ruby ( Cr 3+ : Al2O3) via lock-in rate-window photothermal radiometry
Quantum efficiency and metastable lifetime measurements in ruby ( Cr 3+ : Al2O3) via lock-in rate-window photothermal radiometry A. Mandelis, Z. Chen, R. Bleiss To cite this version: A. Mandelis, Z. Chen,
More informationFrom Unstructured 3D Point Clouds to Structured Knowledge - A Semantics Approach
From Unstructured 3D Point Clouds to Structured Knowledge - A Semantics Approach Christophe Cruz, Helmi Ben Hmida, Frank Boochs, Christophe Nicolle To cite this version: Christophe Cruz, Helmi Ben Hmida,
More informationTwo-step centered spatio-temporal auto-logistic regression model
Two-step centered spatio-temporal auto-logistic regression model Anne Gégout-Petit, Shuxian Li To cite this version: Anne Gégout-Petit, Shuxian Li. Two-step centered spatio-temporal auto-logistic regression
More informationb-chromatic number of cacti
b-chromatic number of cacti Victor Campos, Claudia Linhares Sales, Frédéric Maffray, Ana Silva To cite this version: Victor Campos, Claudia Linhares Sales, Frédéric Maffray, Ana Silva. b-chromatic number
More informationComment on: Sadi Carnot on Carnot s theorem.
Comment on: Sadi Carnot on Carnot s theorem. Jacques Arnaud, Laurent Chusseau, Fabrice Philippe To cite this version: Jacques Arnaud, Laurent Chusseau, Fabrice Philippe. Comment on: Sadi Carnot on Carnot
More informationOn Newton-Raphson iteration for multiplicative inverses modulo prime powers
On Newton-Raphson iteration for multiplicative inverses modulo prime powers Jean-Guillaume Dumas To cite this version: Jean-Guillaume Dumas. On Newton-Raphson iteration for multiplicative inverses modulo
More informationFast Computation of Moore-Penrose Inverse Matrices
Fast Computation of Moore-Penrose Inverse Matrices Pierre Courrieu To cite this version: Pierre Courrieu. Fast Computation of Moore-Penrose Inverse Matrices. Neural Information Processing - Letters and
More informationSoundness of the System of Semantic Trees for Classical Logic based on Fitting and Smullyan
Soundness of the System of Semantic Trees for Classical Logic based on Fitting and Smullyan Shahid Rahman To cite this version: Shahid Rahman. Soundness of the System of Semantic Trees for Classical Logic
More informationMONITORING BIVARIATE PROCESSES WITH A SYNTHETIC CONTROL CHART BASED ON SAMPLE RANGES
Blumenau-SC, 27 a 3 de Agosto de 217. MONITORING BIVARIATE PROCESSES WITH A SYNTHETIC CONTROL CHART BASED ON SAMPLE RANGES Marcela A. G. Machado São Paulo State University (UNESP) Departamento de Produção,
More informationVariations in a manufacturing process can be categorized into common cause and special cause variations. In the presence of
Research Article (wileyonlinelibrary.com) DOI: 10.1002/qre.1514 Published online in Wiley Online Library Memory-Type Control Charts for Monitoring the Process Dispersion Nasir Abbas, a * Muhammad Riaz
More informationSolubility prediction of weak electrolyte mixtures
Solubility prediction of weak electrolyte mixtures Gilles Févotte, Xiang Zhang, Gang Qian, Xing-Gui Zhou, Wei-Kang Yuan To cite this version: Gilles Févotte, Xiang Zhang, Gang Qian, Xing-Gui Zhou, Wei-Kang
More informationNew Basis Points of Geodetic Stations for Landslide Monitoring
New Basis Points of Geodetic Stations for Landslide Monitoring V Riabchii, M Tregub, Yankin To cite this version: V Riabchii, M Tregub, Yankin. New Basis Points of Geodetic Stations for Landslide Monitoring.
More informationTrench IGBT failure mechanisms evolution with temperature and gate resistance under various short-circuit conditions
Trench IGBT failure mechanisms evolution with temperature and gate resistance under various short-circuit conditions Adel Benmansour, Stephane Azzopardi, Jean-Christophe Martin, Eric Woirgard To cite this
More informationSome explanations about the IWLS algorithm to fit generalized linear models
Some explanations about the IWLS algorithm to fit generalized linear models Christophe Dutang To cite this version: Christophe Dutang. Some explanations about the IWLS algorithm to fit generalized linear
More informationInteractions of an eddy current sensor and a multilayered structure
Interactions of an eddy current sensor and a multilayered structure Thanh Long Cung, Pierre-Yves Joubert, Eric Vourc H, Pascal Larzabal To cite this version: Thanh Long Cung, Pierre-Yves Joubert, Eric
More informationA note on the acyclic 3-choosability of some planar graphs
A note on the acyclic 3-choosability of some planar graphs Hervé Hocquard, Mickael Montassier, André Raspaud To cite this version: Hervé Hocquard, Mickael Montassier, André Raspaud. A note on the acyclic
More informationSolution to Sylvester equation associated to linear descriptor systems
Solution to Sylvester equation associated to linear descriptor systems Mohamed Darouach To cite this version: Mohamed Darouach. Solution to Sylvester equation associated to linear descriptor systems. Systems
More informationA non-commutative algorithm for multiplying (7 7) matrices using 250 multiplications
A non-commutative algorithm for multiplying (7 7) matrices using 250 multiplications Alexandre Sedoglavic To cite this version: Alexandre Sedoglavic. A non-commutative algorithm for multiplying (7 7) matrices
More informationIMPROVEMENTS OF THE VARIABLE THERMAL RESISTANCE
IMPROVEMENTS OF THE VARIABLE THERMAL RESISTANCE V. Szekely, S. Torok, E. Kollar To cite this version: V. Szekely, S. Torok, E. Kollar. IMPROVEMENTS OF THE VARIABLE THERMAL RESIS- TANCE. THERMINIC 2007,
More informationA new approach of the concept of prime number
A new approach of the concept of prime number Jamel Ghannouchi To cite this version: Jamel Ghannouchi. A new approach of the concept of prime number. 4 pages. 24. HAL Id: hal-3943 https://hal.archives-ouvertes.fr/hal-3943
More informationAxiom of infinity and construction of N
Axiom of infinity and construction of N F Portal To cite this version: F Portal. Axiom of infinity and construction of N. 2015. HAL Id: hal-01162075 https://hal.archives-ouvertes.fr/hal-01162075 Submitted
More informationThe Mahler measure of trinomials of height 1
The Mahler measure of trinomials of height 1 Valérie Flammang To cite this version: Valérie Flammang. The Mahler measure of trinomials of height 1. Journal of the Australian Mathematical Society 14 9 pp.1-4.
More informationSTATISTICAL ENERGY ANALYSIS: CORRELATION BETWEEN DIFFUSE FIELD AND ENERGY EQUIPARTITION
STATISTICAL ENERGY ANALYSIS: CORRELATION BETWEEN DIFFUSE FIELD AND ENERGY EQUIPARTITION Thibault Lafont, Alain Le Bot, Nicolas Totaro To cite this version: Thibault Lafont, Alain Le Bot, Nicolas Totaro.
More informationInfluence of a Rough Thin Layer on the Potential
Influence of a Rough Thin Layer on the Potential Ionel Ciuperca, Ronan Perrussel, Clair Poignard To cite this version: Ionel Ciuperca, Ronan Perrussel, Clair Poignard. Influence of a Rough Thin Layer on
More informationA novel method for estimating the flicker level generated by a wave energy farm composed of devices operated in variable speed mode
A novel method for estimating the flicker level generated by a wave energy farm composed of devices operated in variable speed mode Anne Blavette, Dara O Sullivan, Ray Alcorn, Mohamed Machmoum, Michael
More informationConfirmation Sample Control Charts
Confirmation Sample Control Charts Stefan H. Steiner Dept. of Statistics and Actuarial Sciences University of Waterloo Waterloo, NL 3G1 Canada Control charts such as X and R charts are widely used in industry
More informationMultiple sensor fault detection in heat exchanger system
Multiple sensor fault detection in heat exchanger system Abdel Aïtouche, Didier Maquin, Frédéric Busson To cite this version: Abdel Aïtouche, Didier Maquin, Frédéric Busson. Multiple sensor fault detection
More informationExact Comparison of Quadratic Irrationals
Exact Comparison of Quadratic Irrationals Phuc Ngo To cite this version: Phuc Ngo. Exact Comparison of Quadratic Irrationals. [Research Report] LIGM. 20. HAL Id: hal-0069762 https://hal.archives-ouvertes.fr/hal-0069762
More informationOn size, radius and minimum degree
On size, radius and minimum degree Simon Mukwembi To cite this version: Simon Mukwembi. On size, radius and minimum degree. Discrete Mathematics and Theoretical Computer Science, DMTCS, 2014, Vol. 16 no.
More informationTowards an active anechoic room
Towards an active anechoic room Dominique Habault, Philippe Herzog, Emmanuel Friot, Cédric Pinhède To cite this version: Dominique Habault, Philippe Herzog, Emmanuel Friot, Cédric Pinhède. Towards an active
More informationOn the longest path in a recursively partitionable graph
On the longest path in a recursively partitionable graph Julien Bensmail To cite this version: Julien Bensmail. On the longest path in a recursively partitionable graph. 2012. HAL Id:
More informationNumerical Modeling of Eddy Current Nondestructive Evaluation of Ferromagnetic Tubes via an Integral. Equation Approach
Numerical Modeling of Eddy Current Nondestructive Evaluation of Ferromagnetic Tubes via an Integral Equation Approach Anastassios Skarlatos, Grégoire Pichenot, Dominique Lesselier, Marc Lambert, Bernard
More informationEntropies and fractal dimensions
Entropies and fractal dimensions Amelia Carolina Sparavigna To cite this version: Amelia Carolina Sparavigna. Entropies and fractal dimensions. Philica, Philica, 2016. HAL Id: hal-01377975
More informationComputable priors sharpened into Occam s razors
Computable priors sharpened into Occam s razors David R. Bickel To cite this version: David R. Bickel. Computable priors sharpened into Occam s razors. 2016. HAL Id: hal-01423673 https://hal.archives-ouvertes.fr/hal-01423673v2
More informationA Simple Model for Cavitation with Non-condensable Gases
A Simple Model for Cavitation with Non-condensable Gases Mathieu Bachmann, Siegfried Müller, Philippe Helluy, Hélène Mathis To cite this version: Mathieu Bachmann, Siegfried Müller, Philippe Helluy, Hélène
More informationNew estimates for the div-curl-grad operators and elliptic problems with L1-data in the half-space
New estimates for the div-curl-grad operators and elliptic problems with L1-data in the half-space Chérif Amrouche, Huy Hoang Nguyen To cite this version: Chérif Amrouche, Huy Hoang Nguyen. New estimates
More informationCharacterization of the local Electrical Properties of Electrical Machine Parts with non-trivial Geometry
Characterization of the local Electrical Properties of Electrical Machine Parts with non-trivial Geometry Laure Arbenz, Abdelkader Benabou, Stéphane Clenet, Jean Claude Mipo, Pierre Faverolle To cite this
More informationOn Symmetric Norm Inequalities And Hermitian Block-Matrices
On Symmetric Norm Inequalities And Hermitian lock-matrices Antoine Mhanna To cite this version: Antoine Mhanna On Symmetric Norm Inequalities And Hermitian lock-matrices 015 HAL Id: hal-0131860
More informationWidely Linear Estimation with Complex Data
Widely Linear Estimation with Complex Data Bernard Picinbono, Pascal Chevalier To cite this version: Bernard Picinbono, Pascal Chevalier. Widely Linear Estimation with Complex Data. IEEE Transactions on
More informationSolving a quartic equation and certain equations with degree n
Solving a quartic equation and certain equations with degree n Abdeljalil Saghe To cite this version: Abdeljalil Saghe. Solving a quartic equation and certain equations with degree n. EUROPEAN JOURNAL
More informationLow frequency resolvent estimates for long range perturbations of the Euclidean Laplacian
Low frequency resolvent estimates for long range perturbations of the Euclidean Laplacian Jean-Francois Bony, Dietrich Häfner To cite this version: Jean-Francois Bony, Dietrich Häfner. Low frequency resolvent
More informationSpatial representativeness of an air quality monitoring station. Application to NO2 in urban areas
Spatial representativeness of an air quality monitoring station. Application to NO2 in urban areas Maxime Beauchamp, Laure Malherbe, Laurent Letinois, Chantal De Fouquet To cite this version: Maxime Beauchamp,
More informationEvaluation of the Magnetic Fields and Mutual Inductance between Circular Coils Arbitrarily Positioned in Space
valuation of the Magnetic Fields and Mutual Inductance between Circular Coils Arbitrarily Positioned in Space Ao Anele, Y Hamam, L Chassagne, J Linares, Y Alayli, Karim Djouani To cite this version: Ao
More informationRHEOLOGICAL INTERPRETATION OF RAYLEIGH DAMPING
RHEOLOGICAL INTERPRETATION OF RAYLEIGH DAMPING Jean-François Semblat To cite this version: Jean-François Semblat. RHEOLOGICAL INTERPRETATION OF RAYLEIGH DAMPING. Journal of Sound and Vibration, Elsevier,
More informationSolving the neutron slowing down equation
Solving the neutron slowing down equation Bertrand Mercier, Jinghan Peng To cite this version: Bertrand Mercier, Jinghan Peng. Solving the neutron slowing down equation. 2014. HAL Id: hal-01081772
More informationThe Learner s Dictionary and the Sciences:
The Learner s Dictionary and the Sciences: Geoffrey Williams To cite this version: Geoffrey Williams. The Learner s Dictionary and the Sciences:: Mismatch or no match?. Corpora, Language, Teaching, and
More informationParticle-in-cell simulations of high energy electron production by intense laser pulses in underdense plasmas
Particle-in-cell simulations of high energy electron production by intense laser pulses in underdense plasmas Susumu Kato, Eisuke Miura, Mitsumori Tanimoto, Masahiro Adachi, Kazuyoshi Koyama To cite this
More informationInfluence of product return lead-time on inventory control
Influence of product return lead-time on inventory control Mohamed Hichem Zerhouni, Jean-Philippe Gayon, Yannick Frein To cite this version: Mohamed Hichem Zerhouni, Jean-Philippe Gayon, Yannick Frein.
More informationBERGE VAISMAN AND NASH EQUILIBRIA: TRANSFORMATION OF GAMES
BERGE VAISMAN AND NASH EQUILIBRIA: TRANSFORMATION OF GAMES Antonin Pottier, Rabia Nessah To cite this version: Antonin Pottier, Rabia Nessah. BERGE VAISMAN AND NASH EQUILIBRIA: TRANS- FORMATION OF GAMES.
More informationPerformance analysis of clouds with phase-type arrivals
Performance analysis of clouds with phase-type arrivals Farah Ait Salaht, Hind Castel-Taleb To cite this version: Farah Ait Salaht, Hind Castel-Taleb. Performance analysis of clouds with phase-type arrivals.
More informationA non-linear simulator written in C for orbital spacecraft rendezvous applications.
A non-linear simulator written in C for orbital spacecraft rendezvous applications. Paulo Ricardo Arantes Gilz To cite this version: Paulo Ricardo Arantes Gilz. A non-linear simulator written in C for
More informationTerritorial Intelligence and Innovation for the Socio-Ecological Transition
Territorial Intelligence and Innovation for the Socio-Ecological Transition Jean-Jacques Girardot, Evelyne Brunau To cite this version: Jean-Jacques Girardot, Evelyne Brunau. Territorial Intelligence and
More informationUsing multitable techniques for assessing Phytoplankton Structure and Succession in the Reservoir Marne (Seine Catchment Area, France)
Using multitable techniques for assessing Phytoplankton Structure and Succession in the Reservoir Marne (Seine Catchment Area, France) Frédéric Bertrand, Myriam Maumy, Anne Rolland, Stéphan Jacquet To
More informationQuestion order experimental constraints on quantum-like models of judgement
Question order experimental constraints on quantum-like models of judgement Patrick Cassam-Chenaï To cite this version: Patrick Cassam-Chenaï. Question order experimental constraints on quantum-like models
More informationTheoretical calculation of the power of wind turbine or tidal turbine
Theoretical calculation of the power of wind turbine or tidal turbine Pierre Lecanu, Joel Breard, Dominique Mouazé To cite this version: Pierre Lecanu, Joel Breard, Dominique Mouazé. Theoretical calculation
More informationOn Solving Aircraft Conflict Avoidance Using Deterministic Global Optimization (sbb) Codes
On Solving Aircraft Conflict Avoidance Using Deterministic Global Optimization (sbb) Codes Sonia Cafieri, Frédéric Messine, Ahmed Touhami To cite this version: Sonia Cafieri, Frédéric Messine, Ahmed Touhami.
More informationSparse multivariate factorization by mean of a few bivariate factorizations
Sparse multivariate factorization by mean of a few bivariate factorizations Bernard Parisse To cite this version: Bernard Parisse. Sparse multivariate factorization by mean of a few bivariate factorizations.
More informationSCIENCE & TECHNOLOGY
Pertanika J. Sci. & Technol. 24 (1): 177-189 (2016) SCIENCE & TECHNOLOGY Journal homepage: http://www.pertanika.upm.edu.my/ A Comparative Study of the Group Runs and Side Sensitive Group Runs Control Charts
More informationQuasi-periodic solutions of the 2D Euler equation
Quasi-periodic solutions of the 2D Euler equation Nicolas Crouseilles, Erwan Faou To cite this version: Nicolas Crouseilles, Erwan Faou. Quasi-periodic solutions of the 2D Euler equation. Asymptotic Analysis,
More informationCramér large deviation expansions for martingales under Bernstein s condition
Cramér large deviation expansions for martingales under Bernstein s condition Xiequan Fan, Ion Grama, Quansheng Liu To cite this version: Xiequan Fan, Ion Grama, Quansheng Liu. Cramér large deviation expansions
More informationImpedance Transmission Conditions for the Electric Potential across a Highly Conductive Casing
Impedance Transmission Conditions for the Electric Potential across a Highly Conductive Casing Hélène Barucq, Aralar Erdozain, David Pardo, Victor Péron To cite this version: Hélène Barucq, Aralar Erdozain,
More informationExogenous input estimation in Electronic Power Steering (EPS) systems
Exogenous input estimation in Electronic Power Steering (EPS) systems Valentina Ciarla, Carlos Canudas de Wit, Franck Quaine, Violaine Cahouet To cite this version: Valentina Ciarla, Carlos Canudas de
More informationOn path partitions of the divisor graph
On path partitions of the divisor graph Paul Melotti, Eric Saias To cite this version: Paul Melotti, Eric Saias On path partitions of the divisor graph 018 HAL Id: hal-0184801 https://halarchives-ouvertesfr/hal-0184801
More informationA problem faced in the context of control charts generally is the measurement error variability. This problem is the result of the inability to
A problem faced in the context of control charts generally is the measurement error variability. This problem is the result of the inability to measure accurately the variable of interest X. The use of
More informationOn production costs in vertical differentiation models
On production costs in vertical differentiation models Dorothée Brécard To cite this version: Dorothée Brécard. On production costs in vertical differentiation models. 2009. HAL Id: hal-00421171
More informationSmall Sample Properties of Alternative Tests for Martingale Difference Hypothesis
Small Sample Properties of Alternative Tests for Martingale Difference Hypothesis Amélie Charles, Olivier Darné, Jae Kim To cite this version: Amélie Charles, Olivier Darné, Jae Kim. Small Sample Properties
More informationElectromagnetic characterization of magnetic steel alloys with respect to the temperature
Electromagnetic characterization of magnetic steel alloys with respect to the temperature B Paya, P Teixeira To cite this version: B Paya, P Teixeira. Electromagnetic characterization of magnetic steel
More informationMonitoring the Coefficient of Variation Using Control Charts with Run Rules
Vol., No., pp. 75-94, 23 ICAQM 23 Monitoring the Coefficient of Variation Using Control Charts with Run Rules Philippe Castagliola, Ali Achouri 2, Hassen Taleb 3, Giovanni Celano 4 and Stelios Psarakis
More informationTHE DETECTION OF SHIFTS IN AUTOCORRELATED PROCESSES WITH MR AND EWMA CHARTS
THE DETECTION OF SHIFTS IN AUTOCORRELATED PROCESSES WITH MR AND EWMA CHARTS Karin Kandananond, kandananond@hotmail.com Faculty of Industrial Technology, Rajabhat University Valaya-Alongkorn, Prathumthani,
More informationPredicting the risk of non-compliance to EMC requirements during the life-cycle
Predicting the risk of non-compliance to EMC requirements during the life-cycle Alexandre Boyer, He Huang, Sonia Ben Dhia To cite this version: Alexandre Boyer, He Huang, Sonia Ben Dhia. Predicting the
More informationSOLAR RADIATION ESTIMATION AND PREDICTION USING MEASURED AND PREDICTED AEROSOL OPTICAL DEPTH
SOLAR RADIATION ESTIMATION AND PREDICTION USING MEASURED AND PREDICTED AEROSOL OPTICAL DEPTH Carlos M. Fernández-Peruchena, Martín Gastón, Maria V Guisado, Ana Bernardos, Íñigo Pagola, Lourdes Ramírez
More informationSome approaches to modeling of the effective properties for thermoelastic composites
Some approaches to modeling of the ective properties for thermoelastic composites Anna Nasedkina Andrey Nasedkin Vladimir Remizov To cite this version: Anna Nasedkina Andrey Nasedkin Vladimir Remizov.
More informationDEM modeling of penetration test in static and dynamic conditions
DEM modeling of penetration test in static and dynamic conditions Quoc Anh Tran, Bastien Chevalier, Pierre Breul To cite this version: Quoc Anh Tran, Bastien Chevalier, Pierre Breul. DEM modeling of penetration
More informationNumerical modeling of diffusion within composite media
Numerical modeling of diffusion within composite media Miljan Milosevic To cite this version: Miljan Milosevic. Numerical modeling of diffusion within composite media. 2nd ECCOMAS Young Investigators Conference
More information