[1] ZOU Jiang-wei,CHEN Zeng-ping. Small space target extraction based on morphology and image flow method [J]. Opto-electronic Engineering,2005,32(4)：13-15.

[2] Boccignone G,Chianese A,Picariello A. Small target detection using wavelets[C]// Proceedings of 14th International Conference on Pattern Recognition,Brisbane,Qld,Aug 16-20,1998：1776-1778.

[3] ZHOU Bing,WANG Yong-zhong,SUN Li-hui,et al. Study on Local Entropy Used in Small Target Detection [J]. ACTA PHOTONICA SINIC,2008,37(2)：381-387.

[4] Ratnaweera A,Halgamuge S,Watson H. Self-organizing hierarchical particle swarm optimizer with time-varying acceleration coefficients [J]. IEEE Transactions on Evolutionary Computation(S1089-778X),2004,8(3)：240-255.

[5] Janson S,Middendorf M. A hierarchical particle swarm optimizer [C]// Proceedings of IEEE Congress on Evolutionary Computation,Canberra,Australia,Dec 8-12,2003：770-776.

[6] Higashi N,Iba H. Particle swarm optimization with gaussian mutation [C]// Proceedings of IEEE Swarm Intelligence Symposium,Indianapolis,Indiana,USA,April 24-26,2003：72-79.

[7] Kennedy J,Eberhart R C. Particle Swarm Optimization [C]// Proceeding of IEEE International Conference on Neural Networks,Perth,Australia,1995：1942-1948.

[8] Eberhart R C,Kennedy J. A new optimizer using particle swarm theory [C]// Proceeding On 6th International Symposium on Micro machine and Human Science,Nagoya,Oct 4-6, 1995：39-43.

[9] Shi Y,Eberhart R C. A Modified Particle Swarm Optimizer [C]// Proceedings of the IEEE Conference on Evolutionary Computation,Anchorage,AK,May 4-9,1998：69-73.

[10] Kennedy J. Some Issues and Practices for Particle Swarms [C]// Proceedings of the IEEE Swarm Intelligence Symposium,Honolulu,HI,April 1-5,2007：162-169.

[11] Mendes R,Kennedy J,Neves J. The fully informed particle swarm: simpler, maybe better [J]. IEEE Transactions on Evolutionary Computation(S1089-778X),2004,8(3)：204-210