lecture14: Randomized algorithms: simulated annealing
http://www.cs.sandia.gov/opt/survey/sa.html
http://members.aol.com/btluke/simann1.htm
http://esa.ackleyshack.com/thesis/esthesis7/node14.html
http://appsrv.cse.cuhk.edu.hk/~csc6200/y99/applet/SA/annealing.html
http://www.math.uu.nl/people/beukers/anneal/anneal.html