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PDF文档格式说明，Adobe出品（1999年）很经典(Description PDF document format, from Adobe(1999) and very classic.)

IEEE standard Common Format for Transient Data Exchange (COMTRADE) for power systems.pdf电力系统故障录波的标准数据格式(IEEE standard Common Format for Transient Data Exchange (COMTRADE) for power systems.pdf power system fault recorder standard data format)

shape格式说明，用于自己动手编写转换程序-shape note format for the preparation of yourself conversion

software engineering

The articular about PLSA

北大出版社的下册,值得参考,是个好东东.-Beijing University Press

ds18b20的中英文资料和程序源代码，能够很好的移植到其他程序中去-DS18B20 in both English and Chinese information and source code can be ported to other very good programs to

锐捷网络最新笔试题目（2010年的）在福州大学-Ruijie latest topics written (in 2010) at Fuzhou University

编译原理的教程和一个实习的例子程序，参考价值高。-compiler principles guide and a practical example of the procedure, the high reference value.

采样率小于一个连续时间信号最大频率的2倍时就叫undersampling，欠采样，根据抽样定理，当fs>=2fmax，也就是oversampling，过采样时，数字信号才能重建成原来的模拟信号，欠采样重建会发生混叠-Sampling rate of a continuous-time signal is less than the maximum frequency of 2 times is called undersampling, bandpass sampling, according to sampling theorem, when fs