Capitolul D : BIREFRINGENTA UNDELOR TRANSVERSALE
|
|
- Tiffany Johnson
- 5 years ago
- Views:
Transcription
1 Capitolul D : BIREFRINGENTA UNDELOR TRANSVERSALE 63 D.1) Introducere Incepand cu lucrarea lui Vinni et al. (199), analiza de birefringenta ( splitting )a undelor SKS (sau SKKS) generate de teleseisme (Ä 87 ) cu magnitudine mai mare de 6.0 (uzual) s-a dovedit a fi un instrument deosebit de eficient pentru investigarea anizotropiei mediului de sub statia de inregistrare. Daca intr-un mediu izotrop unda are aceea viteza de propagare in orice directie, mediul cu anizotropie hexagonala (intalnita in marea majoritate a cazurilor reale) va fi caracterizat de o directie (orizontala) a axei rapide (in lungul careia unda are viteza maxima de propagare) de un interval de intarziere intre unda rapida cea lenta. Pentru crusta superioara, directia axei rapide este corelabila, de exemplu, cu orientarea medie a fisurilor (de.ex. Douma Helbig, 1987). Pentru mantaua superioara, directia axei rapide este presupusa a fi paralela cu directia axei cristalografice rapide a olivinei. In ambele cazuri se obtin informatii asupra directiei stress-ului tectonic din aria investigata, cu observatia ca rolul dominant in birefringenta undelor SKS este atribuit mantalei nu crustei. Marimea intervalului de intarziere dintre cele doua unde (rapida lenta) se coreleza cu dentatea fisurilor sau cu gromea stratului anizotrop. Studii de anizotropie pe baza fenomenului de birefringenta au fost efectuate in diverse arii ale globului, furnizand rezultate corelabile cu alte metode geofizice (vezi bibliografia capitolului). In cele mai multe cazuri, cutremurele crustale nu genereaza unde SKS clare (Fig.D1). Fig.D1. Inregistrarea cutremurului 001/1/3 (Solomon Isls., Mw = 6.8) la statia MLR GEOFON o o o ( = 16 ;bacaz = 6 ;Az = 31 ). Se observa undele Pdiff, PKPdf PP. Undele SKS sunt absente, sorea lor teoretica fiind la circa 7 minute dupa sorea PKPdf.
2 64 D.) Fundamentarea teoretica Sa conderam un stem de coordonate Radial-Transversal (Vinni et al., 199) (Fig. D). O unda armonica arbitrara de amplitudine unitara n ωt se decompune in cos β n ωt n β n ωt, unde β este unghiul dintre directia axei rapide directia radiala iar ω este viteza unghiulara a undei. Componenta de referinta paralela cu axa poate fi descompusa suplimentar de-a lungul axelor R T in cos βn ωt cos β n β n ωt, respectiv. Componenta perpendiculara pe axa rapida este intarziata cu δ t fata de componenta de referinta. Ea se poate descompune de-a lungul axelor R T in n β n ω(t δt) cosβn βn ω( t δt). Deci unda armonica unitara ce a intrat in stemul anizotrop are la iere componentele (Vinni et al., 199): R( t) = cos βn ωt + n βn ω( t δ t ) (D1) T ( t ) 0.5n β[ n ωt n ω( t δt) ] unde unghiul β se poate presupune a fi in intervalul ( π / ; π / ), β 0 =, (D) β. Fig.D. Sistemele de coordonate (E-N) (R-T) cu indicarea azimutului directiei rapide ( fastest axis ) a unghiului de bacazimut. Fie x = R(t) y = T (t ). Din ecuatiile (F1) (F) rezulta (Ivan, 000) ( x y cot β ) + y cot ( ωδt / ) / n β = cos ( ωδ t / ) (D3) Pentru β ±π / 4, conderam urmatoarea rotatie a stemului de coordonate unde unghiul de rotatie este dat de x = X cosϕ Y n ϕ (D4) y = X n ϕ + Y cosϕ (D5) [ cos 4β + cot ( ωδ / ) ] tanϕ = n 4β / t (D6) In noul stem, ecuatia (F3) devine X / a + Y / b = 1 (D7) arata ca miscarea particulei sub actiunea undei este o elipsa avand patratul raportului semi-axelor egal cu: a / b = (tanβ + cot ϕ) /(tan β tan ϕ ) (D8) Derivand componenta transversala din ecuatia (F) in raport cu timpul, rezulta Deci Fie dt / dt = ωn β n( ωδt / )n ω( t δt / ) (D9) ( T ( t) cos β R( )n β) dt / dt = ω tan( ωδ t / ) t (D10)
3 65 z = dt dt( t ), y = T ( t ), x = R( t ) (D11) / Ecuatia (D10) arata ca valorile instantanee x, y z apartin unui plan in spatiul 3-D corespunzator, adica: z = Ax + By + C, (D1) unde C ia in conderatie eventualele corectii de linie de baza. Coeficientii planului sunt legati de directia necunoscuta β a axei rapide de intervalul de timp de intarziere δ t prin β = 0.5atn( A / B) (D13) T T δt = atn A + B, (D14) π π unde T este perioada undei. Coeficientii planului pot fi obtinuti printr-o procedura de regree standard, adica impunand minimul expreei N = 1 ( + By + C z ) = min Ax, (D15) unde N este numarul de esantioane. Rezulta A = ( b1a ba1 )/ (D16) B = ( ba11 b1 a1 )/ (D17) unde a 11 Sxx Sx, a1 = Sxy Sy, a = S yy S y = (D18) b1 = Sxz Sx Sz, b = Syz S y Sz, = a11a a1. (D19) Am notat valorile medii cu S N N x xy / = 1 = 1 = x / N, S = x y N. (D0) Derivata semnalului transvers poate fi evaluata prin procedeul cubic spline (de.ex. Ahlberg et al., 1967; Bhattacharyya, 1969) sau utilizand facilitatile oferite de PITSA (Scherbaum and Johnson, 199)). D.3) Metodologia de analiza Pentru efectuarea unei analize de birefringenta SKS se recomanda urmatorul mod de lucru: se identifica vizual unda SKS, caracterizata uzual prin amplitudini mari pe canalele orizontale, amplitudini mici pe Z perioade de aproximativ 6-16 secunde (inregistrarile trebuie sa fie BB, eventual LP). Se verifica valoarea (O-C) folond codul ttim. Un exemplu este prezentat in Fig.D3. se verifica polarizarea undei (folond analiza de Particle motion din PITSA), verificandu-se caracterul monocromatic al undei polarizarea ei qua-eliptica (axa mare a elipsei orientata aproximativ in lungul directiei de bacazimut). In cele mai multe cazuri, aspectul elipsei nu este clar, ceea ce impune aplicarea unui filtru trece banda Butterworth de faza zero ( Hz, 3 sectiuni). Acest filtru se poate aplica direct din PITSA (Advanced Tools). Dupa aplicarea filtrului, se reia analiza de Particle motion se identifica inceputul sfartul ferestrei de timp ce urmeaza a fi procesata precum perioada aproximativa a undei. Un exemplu este prezentat in Fig.D3. se taie fereastra de timp ce urmeaza a fi analizata se salveaza cele doua fiere corespunzatoare canalelor N E. Se proceseaza aceste fiere se determina parametrii de splitting (directia axei rapide intervalul de intarziere). avand la dispozitie determinari pe un set de cutremure, se realizeaza o analiza statistica standard in MicrosoftExcel se coreleaza cu alti indicatori de stress (Fig. D4, D5, D6). La statia PSZ s-a obtinut o directie a axei rapide de ± 8.6 (95% confidence level) o deviatie standard de 1.7. Valoarea medie a intervalului de timp de intarziere ( delay time ) este 0.73 ± 0.13 secunde (95% confidence level), cu o deviatie standard de 0.3 secunde.
4 66 Fig.D3. Inregistrarea cutremurului din Honduras 1997/07/11 la statia PSZ (GEOFON Ungaria). Se observa sorea undelor SK(K)Sac, precum a altor faze (P, PP, PKiKP, S) (dupa Ivan et al., 00a). Fig.D4. Analiza de Particle Motion pe sorea undelor SK(K)Sac din Fig.D. Se observa traiectoria qua-eliptica, axa mare a elipsei fiind dispusa aproximativ pe directia statie-epicentru (dupa Ivan et al., 00a). Datele NU sunt filtrate.
5 67 Fig.D5. Analiza statistica a directiei axei rapide la statia PSZ (dupa Ivan et al., 00a). Fig.D6. Analiza statistica a intervalului de intarziere la statia PSZ (dupa Ivan et al., 00a).
6 68 Fig.D7. Corelarea directiei axei rapide cu mecanisme de focar directii de stress bore-hole breaouts ) la statia PSZ (dupa Ivan et al., 00a). Bibliografie Ahlberg, J.H., Nilson, E.N., Walsh, J.L. (1967), The theory of splines and their applications, Academic Press Inc. Barruol, G., Mainprice, D. (1993), A quantitative evaluation of the contribution of crustal rocs to the shear-wave splitting of teleseismic SKS waves, Phys. Earth Planet. Inter., 78, Barruol, G., Kern, H. (1996), Seismic anisotropy and shear-wave splitting in lower-crustal and uppermantle rocs from the Ivrea Zone - experimental and calculated data, Phys. Earth Planet. Inter., 96, Bhattacharyya, B.K. (1969), Bicubic spline interpolation as a method for treatment of potential field data, Geophycs, 34, Buland, R., Chapman, C.H. (1983), The Computation of Seismic Travel Times, Bull. Seism. Soc. Am., 73, Chalot-Prat, F., Girbacea, R. (000), Partial delamination of continental mantle lithosphere, uplift-related crust-mantle decoupling, volcanism and ban formation: a new model for the Pliocene-Quaternary evolution of the southern East-Carpathians, Romania, Tectonophycs 37, Douma, J., Helbig, K. (1987), What can the polarisation of shear waves tell us?, First Brea, 5, Ivan, M., Wiejacz, P., Popa, M., Radulian, M. (000), The Romanian Vrancea event of April 6 th 000: Relocation and Fault Plane Solution, Rev. Roum. Géol., Géophys., Géogr., Ser. Géophys (in press) M. IVAN, 001, SKS splitting observed at GEOFON station MLR in Vrancea area - Romania, Rev.Roum.GEOPHYSIQUE, 44, p.79-86, Bucharest, Romania M. IVAN, L. TOTH, KISZELY, M, 00, SKS splitting observed at the Hungarian GEOFON station PSZ, J.Balan Geoph.Soc., 5,p Marian Ivan, Luis Homem D El Rey-Silva, Vale Marza, 00, Probing the Subcontinental South American Upper Mantle with SKS Splitting at Some Selected Brazilian Sites, in press, Rev.Roum.GEOPHYSIQUE, Bucharest, Romania Kennet, B.L.N., Engdahl, E.R. (1991), Travel times for global earthquae location and phase identification, Geophys. J. Int., 105, Levin, V., Mene, W., Par, J. (1999), Shear-wave splitting in Appalachians and Urals: a case for multilayered anisotropy, J.Geophys.Res. 104,
7 69 Linzer, H.-G., Frisch, W., Zweigel, P., Girbacea, R., Hann, H.-P., Moser, F. (1998), Kinematic evolution of the Romanian Carpathians, Tectonophycs 97, Mueller, B., Reinecer, J., Heidbach, O. and Fuchs, K., 000, The 000 release of the World Stress Map (online la: ). Negut, A., Dinu, C., Negut, M.L., Ivan, M., Niculescu, B. (000), State of the stress orientation determination in Romania by borehole breaouts, SEG/EAGE/RSG Bucharest 000 Int. Conf. & Exp., April 10-14, Romania, Conf. Vol., Radulian, M., Mandrescu, N., Panza, G.F., Popescu, E., Utale, A. (000), Characterization of seismogenic zones of Romania, Pure Appl. Geophys., 157, Radulescu, F. (1988), Seismic models of the crustal structure in Romania, Rev. Roum. Géol., Géophys., Géogr., Ser. Géophys. 3, Raileanu, V., Enescu, D., Rizescu, M. (1996), Shear wave polarization of low-magnitude earthquaes from the Vrancea region, Rev. Roum. Géol., Géoophys., Géogr., Ser. Géophys. 40, Scherbaum, F., Johnson, J. (199), Programmable Interactive Toolbox for Seismological Analys (PITSA), IASPEI Software Library, Vol. 5. Smith, G.P., Estrom, G. (1999), A global study of Pn anisotropy beneath continents, J.Geophys. Res., 104, Vinni, L.P., Maeyeva, L.I., Milev, A., Useno, A.Yu. (199), Global patterns of azimuthal anisotropy and deformations in the continental mantle, Geophys. J. Int. 111, Wiejacz, P. (001), Shear wave splitting across Tornquist-Teisseyre Zone in Poland, J. Balan Geophys. Soc., 4,
O V E R V I E W. This study suggests grouping of numbers that do not divide the number
MSCN(2010) : 11A99 Author : Barar Stelian Liviu Adress : Israel e-mail : stelibarar@yahoo.com O V E R V I E W This study suggests grouping of numbers that do not divide the number 3 and/or 5 in eight collumns.
More informationCristalul cu N atomi = un sistem de N oscilatori de amplitudini mici;
Curs 8 Caldura specifica a retelei Cristalul cu N atomi = un sistem de N oscilatori de amplitudini mici; pentru tratarea cuantica, se inlocuieste tratamentul clasic al oscilatorilor cuplati, cu cel cuantic
More informationReactoare chimice cu curgere piston (ideala) cu amestecare completa de tip batch (autoclava)
Reactoare chimice cu curgere piston (ideala) cu amestecare completa de tip batch (autoclava) Reactorul cu curgere ideala Toate particulele se deplaseaza intr-o directie de-a lungul reactorului, precum
More informationSoluţii juniori., unde 1, 2
Soluţii juniori Problema 1 Se consideră suma S x1x x3x4... x015 x016 Este posibil să avem S 016? Răspuns: Da., unde 1,,..., 016 3, 3 Termenii sumei sunt de forma 3 3 1, x x x. 3 5 6 sau Cristian Lazăr
More information1.3. OPERAŢII CU NUMERE NEZECIMALE
1.3. OPERAŢII CU NUMERE NEZECIMALE 1.3.1 OPERAŢII CU NUMERE BINARE A. ADUNAREA NUMERELOR BINARE Reguli de bază: 0 + 0 = 0 transport 0 0 + 1 = 1 transport 0 1 + 0 = 1 transport 0 1 + 1 = 0 transport 1 Pentru
More informationA GENERALIZATION OF A CLASSICAL MONTE CARLO ALGORITHM TO ESTIMATE π
U.P.B. Sci. Bull., Series A, Vol. 68, No., 6 A GENERALIZATION OF A CLASSICAL MONTE CARLO ALGORITHM TO ESTIMATE π S.C. ŞTEFĂNESCU Algoritmul Monte Carlo clasic A1 estimeazează valoarea numărului π bazându-se
More informationON THE QUATERNARY QUADRATIC DIOPHANTINE EQUATIONS (II) NICOLAE BRATU 1 ADINA CRETAN 2
ON THE QUATERNARY QUADRATIC DIOPHANTINE EQUATIONS (II) NICOLAE BRATU 1 ADINA CRETAN ABSTRACT This paper has been updated and completed thanks to suggestions and critics coming from Dr. Mike Hirschhorn,
More informationAPPLICATION OF RECEIVER FUNCTION TECHNIQUE TO WESTERN TURKEY
APPLICATION OF RECEIVER FUNCTION TECHNIQUE TO WESTERN TURKEY Timur TEZEL Supervisor: Takuo SHIBUTANI MEE07169 ABSTRACT In this study I tried to determine the shear wave velocity structure in the crust
More informationSisteme cu logica fuzzy
Sisteme cu logica fuzzy 1/15 Sisteme cu logica fuzzy Mamdani Fie un sistem cu logică fuzzy Mamdani două intrări x şi y ieşire z x y SLF Structura z 2/15 Sisteme cu logica fuzzy Mamdani Baza de reguli R
More informationDivizibilitate în mulțimea numerelor naturale/întregi
Divizibilitate în mulțimea numerelor naturale/întregi Teorema îmărţirii cu rest în mulțimea numerelor naturale Fie a, b, b 0. Atunci există q, r astfel încât a=bq+r, cu 0 r < b. În lus, q şi r sunt unic
More informationSEISMOTECTONICS OF VRANCEA (ROMANIA) ZONE: THE CASE OF CRUSTAL SEISMICITY IN THE FOREDEEP AREA *
Romanian Reports in Physics, Vol. 61, No. 2, P. 325 334, 2009 EARTH PHYSICS SEISMOTECTONICS OF VRANCEA (ROMANIA) ZONE: THE CASE OF CRUSTAL SEISMICITY IN THE FOREDEEP AREA * A.ŢUGUI, M. CRAIU, M. ROGOZEA,
More informationEcuatii si inecuatii de gradul al doilea si reductibile la gradul al doilea. Ecuatii de gradul al doilea
Ecuatii si inecuatii de gradul al doilea si reductibile la gradul al doilea Ecuatia de forma Ecuatii de gradul al doilea a + b + c = 0, (1) unde a, b, c R, a 0, - variabila, se numeste ecuatie de gradul
More informationGENERATOARE DE SEMNAL DIGITALE
Technical University of Iasi, Romania Faculty of Electronics and Telecommunications Signals, Circuits and Systems laboratory Prof. Victor Grigoras Cuprins Clasificarea generatoarelor Filtre reursive la
More informationCOMPUTATION OF REGIONAL TRAVEL TIMES AND STATION CORRECTIONS FROM THREE-DIMENSIONAL VELOCITY MODELS
COMPUTATION OF REGIONAL TRAVEL TIMES AND STATION CORRECTIONS FROM THREE-DIMENSIONAL VELOCITY MODELS A. Villaseñor 1,2, M.P. Barmin 1, M.H. Ritzwoller 1, and A.L. Levshin 1 1 Department of Physics, University
More informationTeorema Reziduurilor şi Bucuria Integralelor Reale Prezentare de Alexandru Negrescu
Teorema Reiduurilor şi Bucuria Integralelor Reale Preentare de Alexandru Negrescu Integrale cu funcţii raţionale ce depind de sint şi cost u notaţia e it, avem: cost sint i ( + ( dt d i, iar integrarea
More informationBarem de notare clasa a V-a
Barem de notare clasa a V-a Problema1. Determinați mulțimile A și B, formate din numere naturale, știind că îndeplinesc simultan condițiile: a) A B,5,6 ; b) B A 0,7 ; c) card AB 3; d) suma elementelor
More informationAnalysis the crustal and sub-crustal earthquake catalog of Vrancea region
Nat. Hazards Earth Syst. Sci., 12, 1321 1325, 2012 doi:10.5194/nhess-12-1321-2012 Author(s) 2012. CC Attribution 3.0 License. Natural Hazards and Earth System Sciences Analysis the 1978 2008 crustal and
More informationOVERVIEW INTRODUCTION 3 WHAT'S MISSING? 4 OBJECTIVES 5
OVERVIEW INTRODUCTION 3 WHAT'S MISSING? 4 OBJECTIVES 5 DISTORTION OF SEISMIC SOURCE SPECTRUM 6 PRINCIPLE 7 SEISMIC SOURCE SPECTRUM 8 EFFECT OF RECORDING INSTRUMENTS 9 SEISMOMETERS 9 CORRECTION FOR FREQUENCY
More informationDana Mihaela ENCIU (formerly Mucuta)
Dana Mihaela ENCIU (formerly Mucuta) Ph.D. Candidate (Updated February, 2007) Contact Information: Address: Geophysical Exploration Lab Dept. Geological Sciences University of South Carolina 701 Sumter
More information2D AND 3D PROCESSING OF THE INTERDEPENDENCE BETWEEN THE COMFORT MAIN INDICATORS
BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI Publicat de Universitatea Tehnică Gheorghe Asachi din Iaşi Tomul LVII (LXI), Fasc. 1, 2011 SecŃia TEXTILE. PIELĂRIE 2D AND 3D PROCESSING OF THE INTERDEPENDENCE
More informationNEW LOCAL MAGNITUDE CALIBRATION FOR VRANCEA (ROMANIA) INTERMEDIATE-DEPTH EARTHQUAKES
Romanian Reports in Physics, Vol. 64, No. 4, P. 1097 1108, 2012 EARTH PHYSICS NEW LOCAL MAGNITUDE CALIBRATION FOR VRANCEA (ROMANIA) INTERMEDIATE-DEPTH EARTHQUAKES M. CRAIU, A. CRAIU, C. IONESCU, M. POPA,
More informationRezolvarea ecuaţiilor şi sistemelor de ecuaţii diferenţiale ordinare (II)
Rezolvarea ecuaţiilor şi sistemelor de ecuaţii diferenţiale ordinare (II) Metode multipas Prof.dr.ing. Universitatea "Politehnica" Bucureşti, Facultatea de Inginerie Electrică Suport didactic pentru disciplina
More informationGradul de comutativitate al grupurilor finite 1
Gradul de comutativitate al grupurilor finite Marius TĂRNĂUCEANU Abstract The commutativity degree of a group is one of the most important probabilistic aspects of finite group theory In this survey we
More informationPEAT SEISMOLOGY Lecture 9: Anisotropy, attenuation and anelasticity
PEAT8002 - SEISMOLOGY Lecture 9: Anisotropy, attenuation and anelasticity Nick Rawlinson Research School of Earth Sciences Australian National University Anisotropy Introduction Most of the theoretical
More informationCOMPARATIVE DISCUSSION ABOUT THE DETERMINING METHODS OF THE STRESSES IN PLANE SLABS
74 COMPARATIVE DISCUSSION ABOUT THE DETERMINING METHODS OF THE STRESSES IN PLANE SLABS Codrin PRECUPANU 3, Dan PRECUPANU,, Ștefan OPREA Correspondent Member of Technical Sciences Academy Gh. Asachi Technical
More informationSOURCE ANALYSIS FOR EARTHQUAKE SEQUENCE OCCURRED IN VRANCEA (ROMANIA) REGION ON 6 TO 30 SEPTEMBER 2008
Romanian Reports in Physics, Vol. 64, No. 2, P. 571 59, 212 SOURCE ANALYSIS FOR EARTHQUAKE SEQUENCE OCCURRED IN VRANCEA (ROMANIA) REGION ON 6 TO 3 SEPTEMBER 28 E. POPESCU, F. BORLEANU, M. ROGOZEA, M. RADULIAN
More informationTHE METROLOGY OF OPTICAL FIBRE LOSSES
U. P. B. Sci. Bull., Series A, Vol. 7, Iss. 3, 009 ISSN 3-707 THE METROLOGY OF OPTICAL FIBRE LOSSES Sorin GHINOIU, Niculae N. PUŞCAŞ În aceastǎ lucrare sunt prezentate şi analizate din punct de vedere
More informationUNITATEA DE ÎNVĂȚARE 3 Analiza algoritmilor
UNITATEA DE ÎNVĂȚARE 3 Analiza algoritmilor Obiective urmărite: La sfârşitul parcurgerii acestei UI, studenţii vor 1.1 cunoaște conceptul de eficienta a unui algoritm vor cunoaste si inţelege modalitatile
More informationMantle Anisotropy at Mid-Ocean Ridges
Mantle Anisotropy at Mid-Ocean Ridges Andy Nowacki, Michael Kendall, James Wookey (Nowacki et al., EPSL, 2011) Plate spreading and seismic anisotropy Hess, 1964 MOR Anisotropy Anisotropy due to LPO versus
More informationUNDERWATER LIBS INVESTIGATIONS SETUP FOR METALS IDENTIFICATION
U.P.B. Sci. Bull., Series A, Vol. 72, Iss. 4, 2010 ISSN 1223-7027 UNDERWATER LIBS INVESTIGATIONS SETUP FOR METALS IDENTIFICATION Monica SIMILEANU 1, Roxana RADVAN 2, Niculae PUSCAS 3 LIBS este o tehnică
More informationUSE OF COMBINED SCALING OF REAL SEISMIC RECORDS TO OBTAIN CODE-COMPLIANT SETS OF ACCELEROGRAMS: APPLICATION FOR THE CITY OF BUCHAREST
USE OF COMBINED SCALING OF REAL SEISMIC RECORDS TO OBTAIN CODE-COMPLIANT SETS OF ACCELEROGRAMS: APPLICATION FOR THE CITY OF BUCHAREST Iolanda-Gabriela CRAIFALEANU,, Ioan Sorin BORCIA NIRD URBAN-INCERC,
More informationMantle and crust anisotropy in the eastern China region inferred from waveform
Earth Planets Space, 53, 159 168, 2001 Mantle and crust anisotropy in the eastern China region inferred from waveform splitting of SKS and PpSms Takashi Iidaka 1 and Fenglin Niu 2 1 ERI, University of
More informationSubiecte geometrie licenta matematica-informatica 4 ani
Class: Date: Subiecte geometrie licenta matematica-informatica 4 ani Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. Complementara unui subspatiu
More informationAN APPROACH TO THE NONLINEAR LOCAL PROBLEMS IN MECHANICAL STRUCTURES
U.P.B. Sci. Bull., Series D, Vol. 74, Iss. 3, 2012 ISSN 1454-2358 AN APPROACH TO THE NONLINEAR LOCAL PROBLEMS IN MECHANICAL STRUCTURES Marius-Alexandru GROZEA 1, Anton HADĂR 2 Acest articol prezintă o
More informationAttenuation in Southeastern Carpathians area: Result of upper mantle inhomogeneity
Tectonophysics 410 (2005) 235 249 www.elsevier.com/locate/tecto Attenuation in Southeastern Carpathians area: Result of upper mantle inhomogeneity M. Popa *, M. Radulian, B. Grecu, E. Popescu, A.O. Placinta
More informationTWO BOUNDARY ELEMENT APPROACHES FOR THE COMPRESSIBLE FLUID FLOW AROUND A NON-LIFTING BODY
U.P.B. Sci. Bull., Series A, Vol. 7, Iss., 9 ISSN 3-77 TWO BOUNDARY ELEMENT APPROACHES FOR THE COMPRESSIBLE FLUID FLOW AROUND A NON-LIFTING BODY Luminiţa GRECU, Gabriela DEMIAN, Mihai DEMIAN 3 În lucrare
More informationReactoare chimice cu curgere piston (ideala) (Plug Flow Reactor PFR) cu amestecare completa (Mixed Flow Reactor MFR) de tip batch (autoclava)
Reactoare chimice cu curgere piston (ideala) (Plug Flow Reactor PFR) cu amestecare completa (Mied Flow Reactor MFR) de tip batch (autoclava) Reactorul cu curgere ideala Toate particulele se deplaseaza
More informationA shear-wave traveling through an anisotropic medium is split into two perpendicular
GSA Supplemental Data Item 2015006 X. Tian and M. Santosh: Fossilized lithospheric deformation revealed by teleseismic shear wave splitting in eastern China Appendix: Methods and Results 1. Methods A shear-wave
More informationFINITE ELEMENT ANALYSIS OF FRICTIONAL CONTACTS
BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI Publicat de Universitatea Tehnică Gheorghe Asachi din Iaşi Tomul LIV (LVIII), Fasc. 3, 2011 Secţia CONSTRUCŢII. ARHITECTURĂ FINITE ELEMENT ANALYSIS OF FRICTIONAL
More informationDana Mihaela ENCIU (formerly Mucuta)
Dana Mihaela ENCIU (formerly Mucuta) (Updated July, 2008) Contact Information: Address: ExxonMobil Exploration Company 233 Benmar Drive, GP3-813 Houston, TX 77060 Office phone no: (281)-654-5623; cell:
More informationModelling the Steady State Characteristic of ph Neutralization Process: a Neuro-Fuzzy Approach
BULETINUL Universităţii Petrol Gaze din Ploieşti Vol. LXVII No. 2/2015 79 84 Seria Tehnică Modelling the Steady State Characteristic of ph Neutralization Process: a Neuro-Fuzzy Approach Gabriel Rădulescu
More informationProcedeu de demonstrare a unor inegalităţi bazat pe inegalitatea lui Schur
Procedeu de demonstrare a unor inegalităţi bazat pe inegalitatea lui Schur Andi Gabriel BROJBEANU Abstract. A method for establishing certain inequalities is proposed and applied. It is based upon inequalities
More informationImaging sharp lateral velocity gradients using scattered waves on dense arrays: faults and basin edges
2017 SCEC Proposal Report #17133 Imaging sharp lateral velocity gradients using scattered waves on dense arrays: faults and basin edges Principal Investigator Zhongwen Zhan Seismological Laboratory, California
More information2008 Monitoring Research Review: Ground-Based Nuclear Explosion Monitoring Technologies
STRUCTURE OF THE KOREAN PENINSULA FROM WAVEFORM TRAVEL-TIME ANALYSIS Roland Gritto 1, Jacob E. Siegel 1, and Winston W. Chan 2 Array Information Technology 1 and Harris Corporation 2 Sponsored by Air Force
More informationATTENUATION OF THE ACOUSTIC SCREENS IN CLOSED SPACES
U.P.B. Sci. Bull., Series D, Vol. 69, No. 3, 007 ISSN 15-358 ATTENUATION OF THE ACOUSTIC SCREENS IN CLOSED SPACES Ioan MAGHEŢI 1, Mariana SAVU Lucrarea prezintă calculul atenuării acustice a unui ecran
More informationȘIRURI (TABLOURI UNIDIMENSIONALE)
Problema 1 Enunț ȘIRURI (TABLOURI UNIDIMENSIONALE) Se citesc mai multe numere naturale, până la introducerea numărului 0 şi se memorează într-un şir. Să se găsească toate numerele perfecte din şir. Un
More informationCurs 5 ELEMENTE STRUCTURALE SOLICITATE LA RASUCIRE
Curs 5 ELEENTE STRUCTURALE SOLICITATE LA RASUCIRE Rasucirea (torsiunea), ca stare de solicitare nu apare in mod independent, ci in combinatie cu alte solicitari (ex. incovoiere cu rasucire, compresiune
More informationto Generate Late-Collision, Calc-Alkaline and Alkaline, Mafic Volcanism
to Generate Late-Collision, Calc-Alkaline and Alkaline, Mafic Volcanism Click to enlarge Partial delamination of continental mantle lithosphere, uplift-related crust-mantle decoupling, volcanism and basin
More informationTeoreme de compresie-extensie de tip Krasnoselskii şi aplicaţii (Rezumatul tezei de doctorat)
Teoreme de compresie-extensie de tip Krasnoselskii şi aplicaţii (Rezumatul tezei de doctorat) Sorin Monel Budişan Coordonator ştiinţi c: Prof. dr. Radu Precup Cuprins Introducere 1 1 Generaliz¼ari ale
More informationINFLUENCE OF STRUCTURE COMPONENTS ON MACHINE TOOL ACCURACY
Annals of the Academy of Romanian Scientists Series on Engineering Sciences Online ISSN 2066-8570 Volume 9, Number 2/2017 69 INFLUENCE OF STRUCTURE COMPONENTS ON MACHINE TOOL ACCURACY Prof. ConstantinSANDU
More informationSOME NUMERICAL ASPECTS IN MODELING THE LONGITUDINAL IMPACT OF TWO SHAPE MEMORY ALLOY BARS
UPB Sci Bull, Series C, Vol 72, Iss 4, 2010 ISSN 1454-2358 SOME NUMERICAL ASPECTS IN MODELING THE LONGITUDINAL IMPACT OF TWO SHAPE MEMORY ALLOY BARS Cristian FĂCIU 1, Alain MOLINARI 2 Lucrarea investighează
More informationFORMULELE LUI STIRLING, WALLIS, GAUSS ŞI APLICAŢII
DIDACTICA MATHEMATICA, Vol. 34), pp. 53 67 FORMULELE LUI STIRLING, WALLIS, GAUSS ŞI APLICAŢII Eugenia Duca, Emilia Copaciu şi Dorel I. Duca Abstract. In this paper are presented the Wallis, Stirling, Gauss
More informationANALYSIS OF TRAVEL TIME RESIDUA AT POLISH SEISMOLOGICAL STATIONS ( )
ANALYSIS OF TRAVEL TIME RESIDUA AT POLISH SEISMOLOGICAL STATIONS (1998 2004) PAWEL WIEJACZ, ANITA ZYCH Institute of Geophysics, Polish Academy of Sciences pwiejacz@igf.edu.pl, anitazych@igf.edu.pl Analyse
More informationA macroseismic intensity prediction equation for intermediate depth earthquakes in the Vrancea region, Romania
Originally published as: Sørensen, M., Stromeyer, D., Grünthal, G. (2010): A macroseismic intensity prediction equation for intermediate depth earthquakes in the Vrancea region, Romania. - Soil Dynamics
More informationMATEMATICĂ 3 PROBLEME DE REFLECŢIE
Recapitulare din liceu MATEMATIĂ 3 ANALIZĂ OMPLEXĂ PROBLEME DE REFLEŢIE. Scrieţi numerele următoare sub forma a + bi, unde a, b R: a) 3i + i ; b) i + i ;. Reolvaţi în ecuaţiile: ( + i)( i) c) ( + i)(4
More informationSome aspects of seismic tomography
Some aspects of seismic tomography Peter Shearer IGPP/SIO/U.C. San Diego September 7, 2009 Earthquake Research Institute Part 1: Global Tomography P velocity perturbations 200 km 1000 km 2700 km MIT 2006
More informationHigh-precision location of North Korea s 2009 nuclear test
Copyright, Seismological Research Letters, Seismological Society of America 1 High-precision location of North Korea s 2009 nuclear test Lianxing Wen & Hui Long Department of Geosciences State University
More informationInstitute de Physique du Globe, Paris, France. Summary
Laboratory determination of velocity anisotropy Jason Z. Han, Douglas R. Schmitt, Daniel Collis a, and Javier Escartin b a Institute for Geophysical Research, Department of Physics, University of Alberta,
More informationANOVA IN THE EDUCATIONAL PROCESS
U.P.B. Sci. Bull., Series C, Vol. 70, No. 3, 008 ISSN 454-34 ANOVA IN THE EDUCATIONAL PROCESS Mihaela Florentina MATEI Analiza dispersiei, ANOVA, reprezintă una din metodele statistice, dintre cele mai
More informationSupporting Online Material for
www.sciencemag.org/cgi/content/full/1131692/dc1 Supporting Online Material for Localized Temporal Change of the Earth s Inner Core Boundary This PDF file includes: Materials and Methods Figs. S1 to S3
More informationSTUDIU PRIVIND VARIABILITATEA PROPRIETĂŢILOR CHIMICE ALE SOLULUI ÎN ROMÂNIA STUDY ON VARIABILITY OF SOIL CHEMICAL PROPERTIES IN ROMANIA
Revista Română de Materiale / Romanian Journal of Materials 2014, 44 (4), 375 381 375 STUDIU PRIVIND VARIABILITATEA PROPRIETĂŢILOR CHIMICE ALE SOLULUI ÎN ROMÂNIA STUDY ON VARIABILITY OF SOIL CHEMICAL PROPERTIES
More informationSURFACE WAVE GROUP VELOCITY MEASUREMENTS ACROSS EURASIA
SURFACE WAVE GROUP VELOCITY MEASUREMENTS ACROSS EURASIA A. L. Levshin, M. H. Ritzwoller, and L. I. Ratnikova Department of Physics, University of Colorado at Boulder -Contract Number F49620-95-1-0139 Sponsored
More information28th Seismic Research Review: Ground-Based Nuclear Explosion Monitoring Technologies
GROUND TRUTH HYPOCENTERS AND 3D CRUSTAL VELOCITY STRUCTURE IN CENTRAL ASIA FROM IN-COUNTRY NETWORKS Thomas de la Torre 1, Gaspar Monsalve-Mejia 1, Anne F. Sheehan 1, Charlotte Rowe 2, and Michael Begnaud
More informationProgramarea Dinamica. (si alte chestii adiacente) Andrei Olariu
Programarea Dinamica (si alte chestii adiacente) Andrei Olariu andrei@olariu.org Despre mine - Absolvent FMI UniBuc - Doctorand in prelucrarea limbajului natural, in special in mediul online (Twitter)
More informationSTRUCTURAL INTENSITY METHOD APPLIED TO STUDY OF VIBRATIONS DAMPING / METODA INTENSIMETRIEI STUCTURALE APLICATĂ LA STUDIUL AMORTIZĂRII VIBRAŢIILOR
Vol.48, No. / 06 STRUCTURAL INTENSITY METHOD APPLIED TO STUDY OF VIBRATIONS DAMPING / METODA INTENSIMETRIEI STUCTURALE APLICATĂ LA STUDIUL AMORTIZĂRII VIBRAŢIILOR Assoc. Prof. Ph.D. Eng. Carp-Ciocârdia
More informationELABORATION AND VALIDATION OF AN HPLC METHOD FOR THE QUANTITATIVE ASSAY OF 5-FLUOROURACIL
526 ELABORATION AND VALIDATION OF AN HPLC METHOD FOR THE QUANTITATIVE ASSAY OF 5-FLUOROURACIL LAURA PALADE, IULIANA POPOVICI, GRATIELA POPA, ILEANA COJOCARU * Pharmaceutical Technology Department, Faculty
More informationMantle anisotropy across the southwestern boundary of the Ordos block, North China
Earthq Sci (200)23: 549 553 549 Doi: 0.007/s589-00-0754-2 Mantle anisotropy across the southwestern boundary of the Ordos block, North China, Yongcai Tang Yongshun John Chen Yuanyuan V. Fu 2 Haiyang Wang
More informationGeophysical Journal International
Geophysical Journal International Geophys. J. Int. (2011) 184, 1415 1427 doi: 10.1111/j.1365-246X.2010.04927.x The non-commutivity of shear wave splitting operators at low frequencies and implications
More informationOrdin. pentru aprobarea structurii informaţiilor înscrise pe cardul naţional de asigurări sociale de sănătate
CASA NATIONALA DE ASIGURARI DE SANATATE Ordin pentru aprobarea structurii informaţiilor înscrise pe cardul naţional de asigurări sociale de sănătate Având în vedere: Act publicat in Monitorul Oficial al
More informationSubduction of the Chile Ridge: Upper Mantle Structure and Flow
GSA Supplemental Data Item 2010263 1 Subduction of the Chile Ridge: Upper Mantle Structure and Flow R. M. Russo 1, John C. VanDecar 2, Diana Comte 3, Victor I. Mocanu 4, Alejandro Gallego 1, and Ruth E.
More informationInteligenta Artificiala
Inteligenta Artificiala Universitatea Politehnica Bucuresti Anul universitar 2010-2011 Adina Magda Florea http://turing.cs.pub.ro/ia_10 si curs.cs.pub.ro 1 Curs nr. 4 Cautare cu actiuni nedeterministe
More informationEarthquake location at teleseismic distances from 3-component records (Tutorial with exercise by hand)
Topic Author Version Earthquake location at teleseismic distances from 3-component records (Tutorial with exercise by hand) Peter Bormann (formerly GFZ German Research Centre for Geosciences, D-14473 Potsdam,
More informationSIMULAREA DECIZIEI FINANCIARE
SIMULAREA DECIZIEI FINANCIARE Conf. univ. dr. Nicolae BÂRSAN-PIPU T5.1 TEMA 5 DISTRIBUŢII DISCRETE T5. Cuprins T5.3 5.1 Variabile aleatoare discrete 5. Distribuţia de probabilitate a unei variabile aleatoare
More informationTime dependence of PKP(BC) PKP(DF) times: could this be an artifact of systematic earthquake mislocations?
Physics of the Earth and Planetary Interiors 122 (2000) 221 228 Time dependence of PKP(BC) PKP(DF) times: could this be an artifact of systematic earthquake mislocations? Xiaodong Song Department of Geology,
More informationANEWJOINTP AND S VELOCITY MODEL OF THE MANTLE PARAMETERIZED IN CUBIC B-SPLINES
ANEWJOINTP AND S VELOCITY MODEL OF THE MANTLE PARAMETERIZED IN CUBIC B-SPLINES Michael Antolik, Göran Ekström, Adam M. Dziewonski, Yu J. Gu, Jian-feng Pan, and Lapo Boschi Department of Earth and Planetary
More informationLegi de distribuţie (principalele distribuţii de probabilitate) Tudor Drugan
Legi de distribuţie (principalele distribuţii de probabilitate) Tudor Drugan Introducere In general distribuţiile variabilelor aleatoare definite pe o populaţie, care face obiectul unui studiu, nu se cunosc.
More informationTHE BEHAVIOUR OF ELASTOMERIC BEARINGS UNDER LOAD COMBINATIONS
BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI Publicat de Universitatea Tehnică Gheorghe Asachi din Iaşi Tomul LX (LXIV), Fasc. 3, 2014 Secţia CONSTRUCŢII. ARHITECTURĂ THE BEHAVIOUR OF ELASTOMERIC BEARINGS
More informationSeismic Anisotropy and Mantle Flow in the Izu-Bonin-Mariana Subduction System
Seismic Anisotropy and Mantle Flow in the Izu-Bonin-Mariana Subduction System Matthew J. Fouch (Department of Geological Sciences, Arizona State University, Tempe, AZ 85287, email: fouch@asu.edu) INTRODUCTION
More informationAuxiliary Material. Subduction of oceanic asthenosphere: evidence from sub-slab seismic anisotropy. Teh-Ru Alex Song, Hitoshi Kawakatsu
Auxiliary Material Subduction of oceanic asthenosphere: evidence from sub-slab seismic anisotropy Teh-Ru Alex Song, Hitoshi Kawakatsu correspondence to: tehrusong@gmail.com 1 1. The effect of anisotropy
More information24th Seismic Research Review Nuclear Explosion Monitoring: Innovation and Integration
A REFERENCE DATA SET FOR VALIDATING 3-D MODELS E. R. Engdahl, Eric A. Bergman, Michael H. Ritzwoller, Nikolai M. Shapiro and Anatoli L. Levshin University of Colorado, Boulder Sponsored by Defense Threat
More informationTHERMAL CONDUCTIVITY MEASUREMENT OF CONSTRUCTION MATERIALS USING THE THERMAL PROBE METHOD
BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI Publicat de Universitatea Tehnică Gheorghe Asachi din Iaşi Tomul LVIII (LXII), Fasc. 2, 2012 Secţia CONSTRUCŢII. ARHITECTURĂ THERMAL CONDUCTIVITY MEASUREMENT
More informationTHE EXPERIMENTAL TESTING AND NUMERICAL MODEL CALIBRATION OF A STEEL STRUCTURE
BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI Publicat de Universitatea Tehnică Gheorghe Asachi din Iaşi Tomul LX (LXIV), Fasc. 2, 2014 Secţia CONSTRUCŢII. ARHITECTURĂ THE EXPERIMENTAL TESTING AND NUMERICAL
More informationGeodynamics, tomographic images and seismicity of the Vrancea region (SE-Carpathians, Romania)
EGU Stephan Mueller Special Publication Series, 3, 95 104, 2002 c European Geosciences Union 2002 Geodynamics, tomographic images and seismicity of the Vrancea region (SE-Carpathians, Romania) F. Wenzel
More information2. Finite Impulse Response Filters (FIR)
..3.3aximum error minimizing method. Finite Imule Reone Filter (FIR)..3 aximum error minimizing method he zero hae tranfer function N H a' n con tye n N H b n con n tye ' the lat relation can be exreed
More informationZINA MALIŢA, FLORIN RĂDULESCU. National Institute of Research and Development for Earth Physics, P.O. Box MG-2, , Bucharest
FOCAL MECHANISMS OF SOME CRUSTAL EARTHQUAKES THAT OCCURRED IN THE PANNONIAN DEPRESSION (ARAD SOUTH TIMIŞOARA AREA), THE MOESIAN PLATFORM AND NORTH-DOBROGEAN OROGEN ZINA MALIŢA, FLORIN RĂDULESCU National
More informationUtilizarea limbajului SQL pentru cereri OLAP. Mihaela Muntean 2015
Utilizarea limbajului SQL pentru cereri OLAP Mihaela Muntean 2015 Cuprins Implementarea operatiilor OLAP de baza in SQL -traditional: Rollup Slice Dice Pivotare SQL-2008 Optiunea ROLLUP Optiunea CUBE,
More informationRELOCATION OF THE MACHAZE AND LACERDA EARTHQUAKES IN MOZAMBIQUE AND THE RUPTURE PROCESS OF THE 2006 Mw7.0 MACHAZE EARTHQUAKE
RELOCATION OF THE MACHAZE AND LACERDA EARTHQUAKES IN MOZAMBIQUE AND THE RUPTURE PROCESS OF THE 2006 Mw7.0 MACHAZE EARTHQUAKE Paulino C. FEITIO* Supervisors: Nobuo HURUKAWA** MEE07165 Toshiaki YOKOI** ABSTRACT
More informationFOCAL MECHANISM DETERMINATION USING WAVEFORM DATA FROM A BROADBAND STATION IN THE PHILIPPINES
FOCAL MECHANISM DETERMINATION USING WAVEFORM DATA FROM A BROADBAND STATION IN THE PHILIPPINES Vilma Castillejos Hernandez Supervisor: Tatsuhiko Hara MEE10508 ABSTRACT We performed time domain moment tensor
More informationFATIGUE LIFE PREDICTION OF A CRACKED LAP SPLICE SPECIMEN USING FRACTURE MECHANICS PARAMETERS
U.P.B. Sci. Bull., Series D, Vol. 71, Iss. 3, 2009 ISSN 1454-2358 FATIGUE LIFE PREDICTION OF A CRACKED LAP SPLICE SPECIMEN USING FRACTURE MECHANICS PARAMETERS Pedro M.G.P. Moreira 1, Paulo F.P. de Matos
More informationHabilitation Thesis. Periodic solutions of differential systems: existence, stability and bifurcations
UNIVERSITATEA BABEŞ BOLYAI CLUJ-NAPOCA FACULTATEA DE MATEMATICĂ ŞI INFORMATICĂ Habilitation Thesis Mathematics presented by Adriana Buică Periodic solutions of differential systems: existence, stability
More informationAPPLICATION OF A GLOBAL 3D MODEL TO IMPROVE REGIONAL EVENT LOCATIONS
APPLICATION OF A GLOBAL 3D MODEL TO IMPROVE REGIONAL EVENT LOCATIONS A.L. LEVSHIN AND M.H. RITZWOLLER Center for Imaging the Earth s Interior, Department of Physics, University of Colorado at Boulder *
More informationPolarization analysis on three-component seismic data
Bollettino di Geofisica Teorica ed Applicata Vol., n. -, pp. 9-; Sep.-Dec. Polarization analysis on three-component seismic data P. Capizzi, L. De Luca and M. Vitale Department of Chemistry and Physics
More informationA BROADBAND SEISMIC EXPERIMENT IN YUNNAN, SOUTHWEST CHINA. Sponsored by Defense Threat Reduction Agency. Contract No.
A BROADBAND SEISMIC EXPERIMENT IN YUNNAN, SOUTHWEST CHINA Wenjie Jiao, 1 Winston Chan, 1 and Chunyong Wang 2 Multimax Inc., 1 Institute of Geophysics, China Seismological Bureau 2 Sponsored by Defense
More informationACTA TECHNICA NAPOCENSIS
599 TECHNICAL UNIVERSITY OF CLUJ-NAPOCA ACTA TECHNICA NAPOCENSIS Series: Applied Mathematics and Mechanics Vol. 55, Issue III, SIZE EFFECT ON THE DYNAMICAL BEHAVIOUR OF ELECTROSTATICALLY ACTUATED MEMS
More informationU.P.B. Sci. Bull., Series A, Vol. 74, Iss. 3, 2012 ISSN SCALAR OPERATORS. Mariana ZAMFIR 1, Ioan BACALU 2
U.P.B. ci. Bull., eries A, Vol. 74, Iss. 3, 212 IN 1223-727 A CALAR OPERATOR Mariana ZAMFIR 1, Ioan BACALU 2 În această lucrare studiem o clasă nouă de operatori numiţi -scalari. Aceştia apar în mod natural,
More informationNAME HOMEWORK ASSIGNMENT #4 MATERIAL COVERS CHAPTERS 19, 20, 21, & 2
NAME HOMEWORK ASSIGNMENT #4 MATERIAL COVERS CHAPTERS 19, 20, 21, & 2 Assignment is due the beginning of the class period on December 14, 2004. Mark answers on a scantron sheet, which will be provided.
More informationGlobal 1-D Earth models
Topic Global 1-D Earth models Compiled Peter Bormann (formerly GeoForschungsZentrum Potsdam, Telegrafenberg, by D-14473 Potsdam, Germany); E-mail: pb65@gmx.net Version March 2002 Below, data and background
More informationMugur Acu OPERATORUL INTEGRAL LIBERA-PASCU ŞI PROPRIETĂŢILE ACESTUIA CU PRIVIRE LA FUNCŢIILE UNIFORM STELATE, CONVEXE, APROAPE CONVEXE ŞI
Mugur Acu OPERATORUL INTEGRAL LIBERA-PASCU ŞI PROPRIETĂŢILE ACESTUIA CU PRIVIRE LA FUNCŢIILE UNIFORM STELATE, CONVEXE, APROAPE CONVEXE ŞI α-uniform CONVEXE Editura Universităţii Lucian Blaga din Sibiu
More information2008 Monitoring Research Review: Ground-Based Nuclear Explosion Monitoring Technologies
FINITE-FREQUENCY SEISMIC TOMOGRAPHY OF BODY WAVES AND SURFACE WAVES FROM AMBIENT SEISMIC NOISE: CRUSTAL AND MANTLE STRUCTURE BENEATH EASTERN EURASIA Yong Ren 2, Wei Zhang 2, Ting Yang 3, Yang Shen 2,and
More informationA MODALITY OF USING DIRECT TORQUE CONTROL FOR IMPROVING THE EFFICIENCY OF THE POWER PRESSES
TP PT Lect., P U.P.B. Sci. Bull., Series C, Vol. 73, Iss., ISSN 454-34x A MODALITY OF USING DIRECT TORQUE CONTROL FOR IMPROVING THE EFFICIENCY OF THE POWER PRESSES Sanda Victorinne PAŢURCĂTP PT, Mircea
More information