System_Identification

ansys作为一款多物理场有限元仿真软件，深受大家喜爱，文章中包含了一些ansys使用过程中的注意事项，对ansys的学习很有帮助。(ansys as a multi-physics finite element simulation software, beloved, the article contains some ansys precautions during use of ansys very helpful.)

公务员的电子试卷，做起来很方便，建议需要试试的同学下载这个软件。(Civil e-paper, make it very convenient, it is recommended the need for students to try to download the software.)

说明：  python提取abaqus后处理指定集合的信息（位移和应力）(Python extracts the information (displacement and stress) of the specified set after ABAQUS processing)

说明：  PyTorch是一个基于Torch的Python开源机器学习库，用于自然语言处理等应用程序，中文版官方教程是经典的PYTHON入门到深入教程(Pytorch is an open-source machine learning library for Python based on torch, which is used for natural language processing and other applications. The official Chinese version of the tutorial is a classic introduction to Python to in-depth tutorials)

calculate the result, more execises and more experience.

谭浩强c++课件第五章 是一个很好的C++学习课件 值得拥有(Hemopurification c++ courseware fifth chapter is a good learning courseware deserve C++)

说明：  对流层大气波导，可以使电波在较小的衰减下实现超视距传播，从而对无线电电子系统的运作产生严重的影响。对于通讯电路，它使系统间的相互干扰题目变得复杂；对于探测系统，产生的则是雷达空洞、超视距探测等题目。因此开展大气波导环境中电波传播特性及其应用的探究具有重大的理论意义和军事价值。 (Tropospheric waveguide, can make waves in the smaller attenuation achieve-the-horizon communication, and thus the operation of radio-electronic systems have a serious impact. For the communications circuits, which allows the mutual interference between systems has become a complex subject for the detection system is generated by the radar empty-the-horizon detection and other topics. Therefore, to carry out atmospheric environment of radio wave propagation characteristics of waveguides and its application to explore the theoretical significance and of great military value.)

this book is good for future networking.

Jquery 编写的日历代码非常好用，绝对值得一试。(Jquery rili)

关于信号与系统的答案，可以帮助同学们更好的学习信号与系统(Answer random signal, can help students better learning with the signal)