Jianjun Lei Jian Li A Modified Particle Swarm Optimization for Practical Engineering Optimization. 177-180 2009 ICNC (3) http://doi.ieeecomputersociety.org/10.1109/ICNC.2009.311 conf/icnc/2009 db/conf/icnc/icnc2009-3.html#LeiL09