fortran 90语言得介绍，是学习fortran90语言得一本难得的参考书

SQL的使用从入门到深入，全面介绍-SQL entry from the use of in-depth, comprehensive presentation

实现C语言中的malloc()函数，以及free（）函数-C language realization of the malloc () function, as well as free () function

介绍c和c++语言各类函数功能的文档,内容详细、全面-a document that introduce the functiongs of c and c++ language

这是清华大学所用的数据结构的电子版教材，该书通过实际的算法分析能使初学者很好的掌握这门课程。-used by the data structure electronic version of the materials, the book through practical algorithm analysis allows beginners good about this course.

信号分析很好的资料书籍，结合matlab，希望对你有帮助！-Signal analysis of the information good books, combined with matlab, want to help you!

电力电子与MATLAB仿真，科学和工程专业的研究生做的电力电子方向有了一个良好的信息，有很多共同的电路品种是有用的，非常实用-Power Electronics and MATLAB simulation, science and engineering graduate students to do a good information on the direction of power electronics, there are a variety of common circuit is useful, very practical

图象处理技术中的几种处理方法；阈值分割、形心计算、圆的测量-image processing technology of several approaches; Thresholding segmentation, heart-shaped, measuring round

微软北大讲座电子文档-Beijing talks electronic files

在这部分中提供了由谭浩强编著的《C++程序设计》(清华大学出版社出版)一书中各章的全部习题的参考解答。 为了帮助读者更好地理解程序，我们在有的程序中加了必要的注释。对有的题目，我们提供了几种不同的解法和程序，供读者比较分析。 -In this section provided by the authoring Hao Qiang

QR码是由日本Denso公司于1994年9月研制的一种矩阵二维码符号，QR码除具有一维条码及其它二维条码所具有的信息容量大、可靠性高、可表示汉字及图象多种文字信息、保密防伪性强等优点。是东方国家主流二维码标准-QR code by the Japanese Denso Corporation in September 1994 developed a matrix two-dimensional code symbols, QR code and have a one-dimensional bar code, and other two-dimensional bar code information by a large capacity, high reliability, can be said that Chinese characters and drawings Like a variety of textual information, confidentiality, security and strong advantages. East national mainstream two-dimensional coding