Communication-Systems---4ed---Haykin

子类方法不可比父类方法抛出更多的例外。子类抛出的例外或者与父类抛出的例外一致，或者是父类抛出例外的子类型。或者子类型不抛出例外。(Class methods are not comparable to the parent class method throws more exceptions. The subclass thrown exception or thrown with the parent class exceptions, or the parent class throw exception sub type. Do not throw exceptions or sub type. )

R软件安装及应用，R上输入下图中红色的命令，之后再弹出来的镜像那个选一个比如香港(Installation and Application of R Software)

Wigner-ville函数的ppt教程，可应用于信号的处理(Ppt tutorials Wigner-ville function can be applied to signal processing)

运筹学第3版教辅熊伟的书籍内含课件ppt运筹软件及答案(Operations research 3rd edition books containing supplementary Xiong logistics software and courseware ppt answer)

说明：  Python3 for Data Analysis, a handbook,a table for studying python3.

本课件系统地讲述了几何光学的原理，对入门学者来说很有帮助(The principles of the courseware systematically describes the geometrical optics, for entry scholars helpful)

说明：  文件为uc/os电子书籍，该书通俗易懂，对初学者有很大的帮助(Document for the uc/os e-books, the book user-friendly, and very helpful for beginners)

英文教材：《深入浅出，使用python编程》(python learning in English)

雷达原理（第三版）丁鹭飞，雷达研究领域经典的基础类教材。文件包括各章的PPT以及PDF格式的电子全书。方便快速查阅和仔细研读相关知识。(The book, Radar Principles (3rd edition) by Ding Lufei, is a classical fundamental teaching material in the field of Radar research. The package includes PPT file of each chapter and the detailed e-book in pdf-format, which is very convnient for fast looking for or close reading up related knowledge.)

中国卫生信息数据元值域代码,卫生信息数据元值域代码.(Range of health information data element code range of health information data element code)