详细讲述模拟退火算法的理论原理。并TSP问题为例进行讲解，，并各处多种语言的源代码，包括c，matlab和delphi。

-Describe in detail the theoretical principles of the simulated annealing algorithm. And the TSP as an example to explain, and throughout the source code in multiple languages, including c, Matlab and Delphi.