pth moment exponential stability of stochastic fuzzy Cohen Grossberg neural networks with discrete and distributed delays
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1 Nonlinear Analysis: Modelling and Control Vol. 22 No ISSN pth moment exponential stability o stochastic uzzy Cohen Grossberg neural networks with discrete and distributed delays Changjin Xu Peiluan Li Guizhou Key Laboratory o Economics System Simulation Guizhou University o Finance and Economics Guiyang China xcj403@126.com Received: July / Revised: January / Published online: June Abstract. In this paper stochastic uzzy Cohen Grossberg neural networks with discrete and distributed delays are investigated. By using Lyapunov unction and the Itô dierential ormula some suicient conditions or the pth moment exponential stability o such stochastic uzzy Cohen Grossberg neural networks with discrete and distributed delays are established. An example is given to illustrate the easibility o our main theoretical indings. Finally the paper ends with a brie conclusion. Methodology and achieved results is to be presented. Keywords: stochastic uzzy Cohen Grossberg neural networks global pth moment exponential stability discrete delays distributed delay Itô dierential ormula. 1 Introduction It is well known that Cohen Grossberg neural networks have been widely applied in various ields such as signal processing associative memory and optimization problems [6]. Many scholars argue that in these applications or neural networks it is o prime importance to ensure that the designed neural networks are stable [26]. In hardware implementation time delays inevitably occur due to the inite switching speed o the ampliiers and communication time. The qualitative research and analysis o Cohen Grossberg neural networks with delays has been investigated by numerous authors. Much richer dynamics has been reported [ ]. Considering that the synaptic transmission is a noisy process brought about by random luctuations rom the release o neurotransmitters and other probabilistic causes we think that it is o great signiicance to consider stochastic eects on the stability o neural networks described by stochastic unctional dierential equations [6]. In recent years numerous authors deal with the dynamical behavior o stochastic neural networks see e.g. [ ]. Since Yang and Yang [50] irst This work is supported by National Natural Science Foundation o China Nos and ) and Project o High-Level Innovative Talents o Guizhou Province [2016]5651). c Vilnius University 2017
2 532 C. Xu P. Li introduced uzzy cellular neural networks a lot o scholars have ound that uzzy neural networks have important applications in image processing and many results have been reported on stability and periodicity o uzzy neural networks [ ]. In addition we shall point out that neural networks usually have a spatial nature due to the presence o an amount o parallel pathways o variety o axon sizes and length. A distribution o conduction velocities along these pathways will lead to a distribution o propagation delays. Thus the time-varying delays and continuous distributed delays are more appropriate to uzzy cellular networks [ ]. To the best o our knowledge there are very ew papers that deal with the stability o stochastic uzzy Cohen Grossberg neural networks with discrete and distributed delays [ ]. Inspired by the analysis above in this paper we consider the ollowing stochastic uzzy Cohen Grossberg neural networks with discrete and distributed delays: dx i t) a i xi t) )[ b i xi t) ) n α ij t) n β ij t) c ij t) j xj t τij t) )) K ij t s)g j xj s) ) ds K ij t s)g j xj s) ) ds I i t) σ ij xj t) ) dω j t) 1) where n corresponds to the number o units in the neural networks respectively x i t) corresponds to the state o the ith neuron j and g j are signal transmission unctions τ ij t) denotes the transmission delay along the axon o the jth unit rom the ith unit and satisies 0 τ ij t) τ ij τ ij is a positive constant). a i x i t)) denotes an ampliication unction at time t b i x i t)) is an appropriately behaved unction at time t such that the solutions o model 1) remain bounded I i t) Ĩt) n T ijt)u j t) n H ijt)u j t). α ij t) β ij t) T ij and H ij t) are elements o uzzy eedback MIN template and uzzy eedback MAX template uzzy eed-orward MIN template and uzzy eed-orward MAX template respectively and stands or the uzzy AND and uzzy OR operation respectively u j t) denotes the external input o the ith neurons. Ĩt) is the external bias o ith unit. K ij ) is the delay kernel unction σ ij ) is the diusion coeicient σ i σ i1 σ i2... σ in ) ωt) ω 1 t) ω 2 t)... ω n t)) T is an n-dimensional Brownian motion deined on a complete probability space Ω F {F t } t 0 P) with a iltration {F t } t 0 satisying the usual conditions i.e. it is right continuous and F 0 contains all P-null sets). Here we would like to emphasize that pth moment exponential stability o stochastic delayed uzzy neural networks plays an important role in biological and artiicial neural networks. It can eectively portray the dynamics o neural networks [ ]. ] dt
3 pth moment exponential stability o stochastic uzzy Cohen Grossberg neural networks 533 Thus the research on pth moment exponential stability o stochastic delayed uzzy neural networks has important practical meanings. In addition we point out that the exponential stability in general sense and the pth moment exponential stability are dierent. The ormer is aimed at all dierential equations and the latter is aimed at stochastic dierential equations. General speaking a stochastic dierential equation is exponentially stable traditionally implies a stochastic dierential equation is pth moment exponentially stable. In particular i p 2 then we say that a stochastic dierential equation is exponentially stable in mean square. The key task o this article is to discuss the pth moment exponential stability o system 1). In recent years there are many papers that deal with pth moment exponential stability o stochastic neural networks [324346]. It is worth pointing out that most neural networks involve negative eedback terms or uzzy terms and do not possess ampliication unctions behaved unctions and uzzy terms. Model 1) o this paper has ampliications unction and behaved unctions which dier rom most neural networks with negative eedback term. Up to now there are rare papers that consider pth moment exponential stability this kind o stochastic uzzy neural networks. The main advantages o this article consist o our aspects: i) the study o pth moment exponential stability or stochastic delayed uzzy Cohen Grossberg neural networks with ampliication unctions and behaved unctions is proposed; ii) a set o new suicient criteria that ensure the pth moment exponential stability o system 1) by using Lyapunov unction and the Itô dierential ormula are established; iii) the key ideas o this article are also suitable or handling some other similar stochastic uzzy Cohen Grossberg neural networks; iv) to the best o our knowledge it is the irst time to deal with the pth moment exponential stability or stochastic delayed uzzy Cohen Grossberg neural networks with ampliication unctions behaved unctions and uzzy terms. The remainder o the paper is organized as ollows: in Section 2 the basic deinitions and lemmas are introduced. In Section 3 the suicient condition or the pth moment p 2) exponential stability or system 1) is established by using the Lyapunov unction method and Itô dierential inequality. In Section 4 an illustrative example is given. A brie conclusion is drawn in Section 5. 2 Preliminaries For convenience we introduce some notations. Let C C[ 0] R n ) be the Banach space o continuous unction which map into R n with the topology o uniorm convergence. For any xt) x 1 t) x 2 t)... x n t)) T R n we deine x x p n x it) p ) 1/p 1 < p < ). The initial conditions o system 1) are xs) ϕs) τ s 0 ϕ L p F τ 0] R n ) where L p F τ 0] Rn ) is R n -value stochastic process ϕs) τ s 0 ϕs) is F 0 measurable 0 τ E[ ϕs) p ] ds <. Throughout this paper we always make the ollowing assumptions: H1) There exist positive constants a i and ā i such that 0 < a i a i x) ā i or x R i n. Nonlinear Anal. Model. Control 224):
4 534 C. Xu P. Li H2) j ) and g j ) are Lipschitz continuous on R with Lipschitz constants L j Lg j j n i.e. or all x y R one has j x) j y) L j x y g j x) g j y) L g j x y. H3) b i ) CR R) and there exist positive constants µ i such that b i u) b i v) u v µ i or u v i n. H4) σxt)) σ ij x j t))) n n i j n) there exist nonnegative numbers ϱ i i n) such that tr[σ T x)σx)] n ϱ ix 2 i. H5) The delay kernel K ij : [0 ) [0 ) is a real-valued nonnegative continuous unction and satisies K ijt s) ds ρ ij where ρ ij is a positive constant and i j n. Let C 12 [τ ) R n ; R ) denote the amily o all nonnegative unctions V t x) on [τ ) R n which are continuous once and dierentiable in t and twice dierentiable in x. I V t x) C 12 [τ ) R n ; R ) in view o the Itô ormula we deine an operator LV associated with 1) as { [ LV t x) V t t x) V x t x) a i t) b i t) c ij t) j xj t τij t) )) where V t t x) n α ij t) n β ij t) 1 2 tr[ σ T V xx t x)σ ] K ij t s)g j xj s) ) ds K ij t s)g j xj s) ) ds I i t) V t x) V t x) V x t x) V xx t x) t x i ] dt } ) V t x) x i x j. n n Deinition 1. The equilibrium x o system 1) is said to be global pth moment exponentially stable i there exist positive constants M 1 λ > 0 such that E xt) x p ) M ϕ x p L eλtt0) t > t 0 x 0 R n where xt) x 1 t) x 2 t)... x n t)) T is any solution o system 1) p 2 is a constant when p 2 it is said to be exponential stability in mean square.
5 pth moment exponential stability o stochastic uzzy Cohen Grossberg neural networks 535 Lemma 1. See [50].) Let x and y be two states o system 1). Then n n α ij t)g j x) α ij t)g j y) n αij t) gj x) g j y) n n n β ij t)g j x) β ij t)g j y) βij t) gj x) g j y). Lemma 2. See [7].) I a i > 0 i n) denote p nonnegative real numbers then a 1 a 2 a m ap 1 ap 2 ap m p where p 1 denotes an integer. A particular orm o the above inequality is a p 1 1 a 2 p 1)ap1 p ap 2 p. Lemma 3 [Hölder inequality]. See [38].) Let x) and gx) be two continuous unctions and Ω a set a and b satisy 1/b 1/a 1 or any a 0 b 0 i a > 1 then the ollowing inequality holds: x)gx) ds ) 1/a x) a ds gx) b ds ) 1/b. Ω Ω Ω 3 pth moment exponential stability In this section we shall present suicient conditions or the global pth moment exponential stability o system 1). Theorem 1. Suppose that H1) H5) and the ollowing assumption hold true: H6) there exist a positive diagonal matrix M diagθ 1 θ 2... θ n ) and two constants 0 < Π 2 0 < u < 1 such that 0 < Π 2 Π 2 t) uπ 1 t) t t 0 where { Π 1 t) min 1 i n pa i µ i ā cij i t) L ) j p 1) p 1)ā i cij t) L j p 1)ā αij i t) βij t) ) ρ ij L g j p 1)p 2) ϱ j 2 θ j p 1)ϱ i } Nonlinear Anal. Model. Control 224):
6 536 C. Xu P. Li Π 2 t) max 1 i n { n θ j ā i cij t) L j p 1) ) } then x x 1 x 2... x n) T is a unique equilibrium which is globally pth moment exponentially stable where p 2 denotes a positive constant. When p 2 the equilibrium x o system 1) has exponential stability in mean square. Proo. Similar to [47 57] we can easily prove the existence and uniqueness o the equilibrium or system 1). Here we omit it. Let x x 1 x 2... x n) T be the unique equilibrium o system 1). Set y i t) x i t) x i σ ij σ ij y i t) x j ) σ ijx j ). Then it ollows rom 1) that dy i t) a i yi t) x i ) [ b i yi t) x i ) bi x i ) c ij t) j x j t τij t) )) j x j ) ) n α ij t) n β ij t) K ij t s) g j x j s) ) g j x j ) ) ds K ij t s) g j xj s) ) g j x j ) ) ds σ ij yj t) ) dω j t) t t 0 i n. 2) Deine a Lyapunov unction V by V t yt) ) θ yi i t) p ] dt θ xi i t) x p i p 2. 3) Calculating the operator LV t yt)) and using Lemma 2 associated with system 2) we have LV t yt) ) p [ θ yi i t) p1 sgn { y i t) }{ a i yi t) x ) i b i yi t) x i ) bi x i ) n α ij t) c ij t) j xj t τij t) )) j x j ) ) K ij t s) g j x j s) ) g j x j ) ) ds
7 pth moment exponential stability o stochastic uzzy Cohen Grossberg neural networks 537 p p n β ij t) pp 1) 2 K ij t s) g j xj s) ) g j x j ) ) ds yi t) p2 n σ ij yi t) ) θ yi i t) p1 a i yi t) x ) i µi y i t) sgn { y i t) } ]} θ yi i t) p1 a i yi t) x ) [ n i c ij t) j yj t τij t) )) sgn { y i t) } p p p p p αij t) ρijgj xj s) ) g j x j ) { sgn yi t) } βij t) ρijgj xj s) ) g j x j ) { sgn yi t) }] pp 1) 2 θ yi i t) p2 n θ yi i t) p1 a i µ yi i t) θ yi i t) p1 ā i θ yi i t) p1 ā i pp 1) 2 n n y i t) p2 σ 2 ij sgn { y i t) } cij t) L yi t τij t) ) j αij t) βij t) ) ρ ij L g j yi t) n y i t) p1 a i µ i y i t) ϱ j y 2 i t) ā i c ij t) L j p 1) y i t) p y i t τij t) ) p y i t) p1 ā i pp 1) 2 n θ yi i t) p2 α ij t) β ij t) ) ρ ij L g j y i t) n ϱ j y 2 i t) Nonlinear Anal. Model. Control 224):
8 538 C. Xu P. Li where Π 1 t) min 1 i n {pa i µ i p 1)ā i cij t) L j ā cij i t) n L j p1) p1)ā αij i t) βij t) ) ρ ij L g j p 1)p 2) ϱ j 2 n Π 1 t)v t yt) ) Π 2 t) { pa i µ i } θ j p 1)ϱ i y i t) p θ j ā i cij t) L j p 1) yi t τij t) ) p sup tτ s t p 1)ā i cij t) L j V s ys) ) 4) ā cij i t) L ) n j p 1) p 1)ā αij i t) βij t) ) ρ ij L g j p 1)p 2) ϱ j 2 { n Π 2 t) max 1 i n θ j p 1)ϱ i θ j ā i cij t) L j p 1) ) }. Applying the Itô ormula or t t 0 we have V t ξ yt ξ) ) V t yt) ) tξ 0 LV s ys) ) ds tξ 0 } V y s ys) ) σ s ys) ) dωs). 5) Since E[V x s ys))σs ys)) dωs)] 0 taking expectations on both sides o 5) and applying 4) we get V t ξ yt ξ) ) V t yt) ) tξ The Dini derivative D is t [ Π 1 t)e V s ys) )) Π 2 t)e D E V t yt) )) lim ξ 0 sup sup sτ ς s V ς yς) ))] ds. 6) EV t ξ yt ξ)) V t yt))). ξ
9 pth moment exponential stability o stochastic uzzy Cohen Grossberg neural networks 539 Denote zt) EV t yt))). It ollows rom 6) that In view o Lemma o [17] we obtain That is where D zt) Π 1 t)zt) Π 2 t) z t p. zt) zt0 ) p e λtt0). E [ xt) x p ] M ϕ x p e λtt0) t t 0 M max 1 i n min 1 i n > 1 and λ is the unique positive solution o the ollowing equation: λ Π 1 t) Π 2 t)e λτ. Thus the equilibrium x o system 1) is pth moment exponentially stable. The proo o Theorem 1 is completed. 4 An illustrate example In this section we present numerical examples to illustrate the eectiveness o the obtained results. Consider the ollowing stochastic uzzy Cohen Grossberg neural networks with discrete and distributed delays: dx 1 t) a 1 x1 t) )[ b 1 x1 t) ) 2 c 1j t) j xj t τ1j t) )) 2 α 1j t) 2 β 1j t) 2 σ 1j xj t) ) dω j t) K ij t s)g j xj s) ) ds K 1j t s)g j xj s) ) ds I 1 t) dt dx 2 t) a 2 x2 t) )[ b 2 x2 t) ) 2 c 2j t) j xj t τ2j t) )) 2 α 2j t) K 2j t s)g j xj s) ) ds ] 7a) Nonlinear Anal. Model. Control 224):
10 540 C. Xu P. Li 2 β 2j t) 2 σ 2j xj t) ) dω j t) K 2j t s)g j xj s) ) ] ds I 2 t) dt 7b) where j x) g j x) x 1 x 1 )/2 K ij t) te t and [ ] [ ] a1 x 1 t)) a 2 x 2 t)) 4 2 cos x1 t) 3 2 sin x 2 t) b 1 x 1 t)) b 2 x 2 t)) 12x 1 t) 14x 2 t) [ ] [ ] [ ] [ ] c11 t) c 12 t) α11 t) α 12 t) c 21 t) c 22 t) α 21 t) α 22 t) [ ] β11 t) β 12 t) β 21 t) β 22 t) [ ] τ11 t) τ 12 t) τ 21 t) τ 22 t) [ ] [ ] [ ] σ11 t) σ 12 t) σ 21 t) σ 22 t) [ ] I1 t) I 1 t) [ ] 3 4t. 1 2t [ ] 0.3x 0.2x 0.1x 0.4x Let ϱ ϱ then it is easy to see that that H1) H5) are satisied. Let p 2 then we can obtain Π Π There exists a positive constant 0 < u 0.8 < 1 such that 0 < Π < uπ Thus all the assumptions in Theorem 1 are ulilled. Thus we can conclude that system 7) has a unique equilibrium point x which is pth moment exponentially stable. The results are illustrated in Fig. 1 a) Figure 1. Transient response o state variables: a) x 1 t) b) x 2 t). b)
11 pth moment exponential stability o stochastic uzzy Cohen Grossberg neural networks Conclusions In this paper applying Lyapunov unction and the Itô dierential ormula we investigate the pth moment exponential stability or a class o stochastic uzzy Cohen Grossberg neural networks with discrete and distributed delays. Some simple suicient conditions checking the pth moment exponential stability o the stochastic uzzy Cohen Grossberg neural networks with discrete and distributed delays have been obtained. The obtained criteria play an important role in designing pth moment exponential stability o stochastic uzzy Cohen Grossberg neural networks. Reerences 1. P. Balasubramaniam M. Kalpana R. Rakkiyappan State estimation or uzzy cellular neural networks with time delay in the leakage term discrete and bounded distributed delays Comput. Math. Appl. 6210): P. Balasubramaniam M. Kalpana R. Rakkiyappan Stationary oscillation o interval uzzy cellular neural networks with mixed delays under impulsive perturbations Neural Comput. Appl ): P. Balasubramaniam R. Rakkiyappan R. Sathy Delay dependent stability results or uzzy BAM neural networks with Markovian jumping parameters Expert Syst. Appl. 381): P. Balasubramaniam M. Syed Ali Stability analysis o Takagi Sugeno uzzy Cohen Grossberg BAM neural networks with discrete and distributed time-varying delays Math. Comput. Modelling 531 2): P. Balasubramaniam M. Syed Ali S. Arik Global asymptotic stability o stochastic uzzy cellular neural networks with multiple time-varying delays Expert Syst. Appl. 3712): H. Bao Dynamic analysis o stochastic uzzy Cohen Grossberg neural networks with timevarying delays Adv. Dier. Equ ): J.D. Cao J. Liang Boundedness and stability or Cohen Grossberg neural network with timevarying delays J. Math. Anal. Appl. 2962): J.D. Cao R. Rakkiyappan K. Maheswari A. Chandrasekar Exponential H iltering analysis or discrete-time switched neural networks with random delays using sojourn probabilities Sci. China Technol. Sci. 593): L. Chen R. Wu D. Pan Mean square exponential stability o impulsive stochastic uzzy cellular neural networks with distributed delays Expert Syst. Appl. 385): Y. Du S. Zhong N. Zhou Global asymptotic stability o Markovian jumping stochastic Cohen Grossberg BAM neural networks with discrete and distributed time-varying delays Appl. Math. Comput. 243: Y. Du S. Zhong N. Zhou K. Shi J. Cheng Exponential stability or stochastic Cohen Grossberg BAM neural networks with discrete and distributed time-varying delays Neurocomputing 127: Nonlinear Anal. Model. Control 224):
12 542 C. Xu P. Li 12. Q. Gan Exponential synchronization o stochastic uzzy cellular neural networks with reaction-diusion terms via periodically intermittent control Neural Process. Lett. 373): Q. Gan R. Xu P. Yang Exponential synchronization o stochastic uzzy cellular neural networks with time delay in the leakage term and reaction-diusion Commun. Nonlinear Sci. Numer. Simul. 174): Q. Gan R. Xu P. Yang Synchronization o non-identical chaotic delayed uzzy cellular neural networks based on sliding mode control Commun. Nonlinear Sci. Numer. Simul. 171): W. Han Y. Liu L. Wang Global exponential stability o delayed uzzy cellular neural networks with Markovian jumping parameters Neural Comput. Appl. 211): C. Huang J. Cao On pth moment exponential stability o stochastic Cohen Grossberg neural networks with time-varying delays Neurocomputing 734-6): C. Huang J. Cao P. Chen Dynamic analysis o stochastic recurrent neural networks Neural Process. Lett. 273): T. Huang Exponential stability o uzzy cellular neural networks with distributed delay Phys. Lett. A ): T. Huang Exponential stability o delayed uzzy cellular neural networks with diusion Chaos Soliton Fractals 311-3): J. Jian B. Wang Global Lagrange stability or neutral-type Cohen Grossberg BAM neural networks with mixed time-varying delays Math. Comput. Simul. 116: Y. Ke C. Miao Stability analysis o ractional-order Cohen Grossberg neural networks with time delay Int. J. Comput. Math ): K. Li Impulsive eect on global exponential stability o BAM uzzy cellular neural networkswith time-varying delays Int. J. Syst. Sci. 412): L. Li J. Jian Exponential convergence and Lagrange stability or impulsive Cohen Grossberg neural networks with time-varying delays J. Comput. Appl. Math. 277: X. Li R. Rakkiyappan P. Balasubramaniam Existence and global stability analysis o equilibrium o uzzy cellular neural networks with time delay in the leakage term under impulsive perturbations J. Franklin Inst. 482): Y. Li C. Wang Existence and global exponential stability o equilibrium or discrete-time uzzy BAM neural networks with variable delays and impulses Fuzzy Sets Syst. 217: J. Liang J. Cao Global output convergence o recurrent neural networks with distributed delays Nonlinear Anal. Real World Appl. 81): Y. Liu W. S. Tang Exponential stability o uzzy cellular neural networks with constant and time-varying delays Phys. Lett. A ): Z. Liu H. Zhang Z. Wang Novel stability criterions o a new uzzy cellular neural networks with time-varying delays Neurocomputing 724 6): S. Long D. Xu Stability analysis o stochastic uzzy cellular neural networks with timevarying delays Neurocomputing ):
13 pth moment exponential stability o stochastic uzzy Cohen Grossberg neural networks S. Long D. Xu Global exponential p-stability o stochastic non-autonomous Takagi Sugeno uzzy cellular neural networks with time-varying delays and impulses Fuzzy Sets Syst. 253: T. Lv P. Yan Dynamical behaviors o reaction diusion uzzy neural networks with hybrid delays and general boundary conditions Commun. Nonlinear Sci. Numer. Simul. 162): G. Nagamani S. Ramasamy Dissipativity and passivity analysis or discrete-time T S uzzy stochastic neural networks with leakage time-varying delays based on Abel lemma approach J. Franklin Inst ): M.J. Park O. Kwon J. Park S. Lee Simpliied stability criteria or uzzy Markovian jumping Hopield neural networks o neutral type with interval time-varying delays Expert Syst. Appl. 395): R. Rakkiyappan P. Balasubramaniam On exponential stability results or uzzy impulsive neural networks Fuzzy Sets Syst ): R. Rakkiyappan N. Sakthivel J. H. Park O.M. Kwon Sampled-data state estimation or Markovian jumping uzzy cellular neural networks with mode-dependent probabilistic timevarying delays Appl. Math. Comput. 221: Q. Song J. Cao Dynamical behaviors o a discrete-time uzzy cellular neural networks with variable delays and impulses J. Franklin Inst. 3451): Q. Song Z. Wang Dynamical behaviors o uzzy reaction-diusion periodic cellular neural networks with variable coeicients and delays Appl. Math. Modelling 339): Y. Sun J. Cao pth moment exponential stability o stochastic recurrent neural networks with time-varying delays Nonlinear Anal.: Real World Appl. 84): M. Syed Ali P. Balasubramaniam Global asymptotic stability o stochastic uzzy cellular neural networks with multiple discrete and distributed time-varying delays Commun. Nonlinear Sci. Numer. Simul. 167): J. Tan C. Li T. Huang The stability o impulsive stochastic Cohen Grossberg neural networks with mixed delays and reaction-diusion terms Cogn. Neurodyna. 92): M. Tan Global asymptotic stability o uzzy cellular neural networks with unbounded distributed delays Neural Process. Lett. 312): C. Wang Y. Kao G. Yang Exponential stability o impulsive stochastic uzzy reactiondiusion Cohen Grossberg neural networks with mixed delays Neurocomputing 89: C. Wang Y. Kao G. Yang Exponential stability o impulsive stochastic uzzy reactiondiusion Cohen Grossberg neural networks with mixed delays Neurocomputing 89: J. Wang J. Lu Globally exponential stability o uzzy cellular neural networks with delays and reaction-diusion terms Chaos Soliton Fractals 383): L. Wang W. Ding Synchronization or delayed non-autonomous reaction-diusion uzzy cellular neural networks Commun Nonlinear Sci. Numer. Simul. 171): Nonlinear Anal. Model. Control 224):
14 544 C. Xu P. Li 46. W. Xie Q.X. Zhu Mean square exponential stability o stochastic uzzy delayed Cohen Grossberg neural networks with expectations in the coeicients Neurocomputing 166: D. Xu H. Zhao H. Zhu Global dynamics o Hopield neural networks involving variable delays Comput. Math. Appl. 421): P. Yan T. Lv Exponential syschronization o uzzy cellular neural networks with mixed delay and general boundary conditions Commun. Nonlinear Sci. Numer. Simul. 172): G. Yang Y. Kao W. Li X. Sun Exponential stability o impulsive stochastic uzzy cellular neural networks with mixed delays and reaction-diusion terms Neural Comput. Appl ): T. Yang L. Yang The global stability o uzzy cellular neural networks IEEE Trans. Circuits Syst. 4310): T. Yang L. Yang C. Wu L. Chua Fuzzy cellular neural networks: Applications in 1996 Fourth IEEE International Workshop on Cellular Neural Networks and their Applications Proceedings CNNA-96) Seville Spain June IEEE 1996 pp T. Yang L. Yang C. Wu L. Chua Fuzzy cellular neural networks: Theory in 1996 Fourth IEEE International Workshop on Cellular Neural Networks and their Applications Proceedings CNNA-96) Seville Spain June IEEE 1996 pp X. Yang J. Cao J. Qiu pth moment exponential stochastic synchronization o coupled memristor-based neural networks with mixed delays via delayed impulsive control Neural Netw. 65: F. Yu H. Jiang Global exponential synchronization o uzzy cellular neural networks with delays and reaction-diusion terms Neurocomputing 744): S. Yu Z. Zhang Z. Quan New global exponential stability conditions or inertial Cohen Grossberg neural networks with time delays Neurocomputing 151: K. Yuan J. Cao J. Deng Exponential stability and periodic solutions o uzzy cellular neural networks with time-varying delays Neurocomputing ): H. Zhao J. Cao New conditions or global exponential stability o cellular neural networks with delays Neurocomputing 1810): W. Zhou L. Teng D. Xu Mean-square exponentially input-to-state stability o stochastic Cohen Grossberg neural networks with time-varying delays Neurocomputing 153: Q. Zhu J. Cao pth moment exponential synchronization or stochastic delayed Cohen Grossberg neural networks with Markovian switching Nonlinear Dyn. 671): Q. Zhu J. Cao R. Rakkiyappan Exponential input-to-state stability o stochastic Cohen Grossberg neural networks with mixed delays Nonlinear Dyn. 79:
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