TwinCAT PLC 编程手册（2011 更新版）

article about umat abaqus

说明：  ansys实现傅里叶转化的宏命令，对学习ansys有帮助。(ansys Fourier transformation to achieve macro command, to learn ansys help.)

有关对流层散射传播的电子书，其中《对流层散射传播》是张明高写的书(Tropospheric scatter about the spread of e-books, including " troposcatter propagation" is a book written by Zhang Gao)

GPS原理与接收机设计,目前为止是该领域最好的中文入门PDF电子书籍 第1章和第2章将介绍GPS的一些基础知识。 第3章至第6章将介绍GPS定位算法。 第7章至第9章将介绍用来提高GPS定位性能的三方面技术与应用。(GPS principle and receiver design, so far the best Chinese introduction to PDF electronic books in this field)

三阶段DEA模型的参考文献，附有DEA模型介绍的PPt。(References of the three-stage DEA model, in a powerpoint presentation with DEA model is introduced.)

Python核心编程(中文第二版）.pdf(Core Python Programming (English Second Edition). Pdf )

EXT2[1].0中文教程，实例非常实用(EXT2 [1] .0 English tutorials, examples of very useful)

说明：  智能视频监控系统目标检测和跟踪技术分析研究(Intelligent video surveillance system target detection and tracking of technical analysis)

说明：  Python机器学习实践：测试驱动的开发方法(Python machine learning practice: Test Driven Development Method)

说明：  python编程约40例，有词频统计、读写文件、有网络爬虫、绘制图像等例程(Python programming about 40 examples, including word frequency statistics, reading and writing files, network crawlers, drawing images and other routines)