三次差分编码 和一次LZW压缩matlab源码，绝对正确，而且压缩率很高，80 以上，要是有不懂的，可以咨询我。-This is a realisation of lzw compression.If you have some problems ,you can contact with me.

大学生就业咨询系统，可以查询就业企业的详情，也可以查询就业大学生的详细资料，同时能够实现数据库的备份与恢复-Employment of university students consultation system, you can check the details of the employment business, you can check the details of the employment of university students, while able to achie