svm 的参数优化，利用ga(遗传优化算法)选择最优参数c g，最终提高训练集的分类准确率，更好的提高分类器性能,这是ga的功能函数源码-Svm parameter optimization, the use of ga (genetic optimization algorithm) to　the optimal parameter c g, and ultimately improve the training set classification accuracy, better improve the performance of the classifier, which is ga function function source