NOTE 090911

1. Data driven
In Tombone's blog, several good posts on this subject. This guy promotes data-driven approach hardly.

2. libpmk 移植到 mingw，终于可以，原来是文件路径问题
因为 linux 中使用了 /tmp 文件夹，win32 中是没有的。

3. Use libsvm in classification with pre-computed kernel.
use libsvm directly. only have to convert the kernel data to libsvm format and use '-t 4' parameter
The code is collected in my toolbox.