19 [17] H. Zhou, Z. Zhou, W. Jiang, Almost periodic solutions for neutral type BAM neural networks with distributed leakage delays on time scales, Neurocomputing 157 (2015) 223–230. [16] C. Wang, Almost periodic solutions of impulsive BAM neural networks with variable delays on time scales, Commun. Nonlinear. Sci. Numer. Simulat. 19 (2014) 2828–2842. [15] B. Zhou, Q. Song, H. Wang, Global exponential stability of neural networks with discrete and distributed delays and general activation functions on time scales, Neurocomputing 74 (2011) 3142– 3150. [14] Y. Su, Z. Feng, Homoclinic orbits and periodic solutions for a class of Hamiltonian systems on time scales, Journal of Mathematical Analysis and Applications 411 (2014) 37–62. [13] C.C. Tisdell, A. Zaidi, Basic qualitative and quantitative results for solutions to nonlinear, dynamic equations on time scales with an application to economic modelling, Nonlinear Analysis 68 (2008) 3504–3524. [12] J. Zhang, M. Fan, H. Zhu, Periodic solution of single population models on time scales, Mathematical and Computer Modelling 52 (2010) 515–521. [11] V. Lakshmikantham, S. Sivasundaram, B. Kaymakcalan, Dynamic Systems on Measure Chains, Kluwer Academic Publishers, Netherlands, 1996. [10] M. Bohner, A. Peterson, Dynamic Equations on Time Scales: An Introduction with Applications, Birkhäuser, Boston, 2001. [9] S. Hilger, Ein Maßkettenkalkül mit Anwendung auf Zentrumsmanningfaltigkeiten, PhD thesis, Uni- versität Würzburg, 1988. [8] H.N. Cheung, A. Bouzerdoum, W. Newland, Properties of shunting inhibitory cellular neural net- works for colour image enhancement, Proceedings of 6th International Conference on Neural Infor- mation Processing, Perth, Western Australia, 1999, pp. 1219–1223. [7] R.B. Pinter, R.M. Olberg, E. Warrant, Luminance adaptation of preferred object size in identified dragonfly movement detectors, Proceedings of IEEE International Conference on Systems, Man and Cybernetics, 1989, pp. 682–686. [6] A. Bouzerdoum, R.B. Pinter, A shunting inhibitory motion detector that can account for the func- tional characteristics of fly motion sensitive interneurons, Proceedings of IJCNN International Joint Conference on Neural Networks, 1990, pp. 149–153.