坦克大战的网络版，可以手动指定IP，端口，使用TCP和UDP通信。对学习Socket很有帮助。-Battle City online version, you can manually specify the IP, port, using TCP and UDP traffic. Socket helpful for learning.

Is a good learning materials to learn PCA feature extraction, Matlab for beginner students will help, Verify recognition algorithm based on palmprint recognition undergraduate complete set of online identity.