a_visual_guide_to_stata_graphics

华为培训教程，华为内部资料，非常值得一读的。(huawei training book, huawei inner book, it s worth reading.)

python与机器学习实战教程，机器学习通过Python语言实现，通过大量的实例再现机器学习强大的生命力(Python and Machine Learning Practical Course. Machine Learning is realized by Python Language, and the powerful vitality of machine learning is reappeared through a large number of examples.)

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)

python核心编程书籍,适合小白入门的一本书强烈推荐(Python core programming books)

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)

Visual basic complete tutorial for connection to db s

OReilly 出品的 LDAP.System.Administration(OReilly production of LDAP.System.Administration)

powerdesigner，很好的书籍，可以帮助学习到如何应用powerdesigner(powerdesigner, good books, can help to learn how to apply powerdesigner)

一些黑客毁坏别人的文件甚至整个硬盘，他们被称为电脑狂人（crackers）或计算机破 坏者（vandals）。另一些新手省去学习技术的麻烦，直接下载黑客工具侵入别人的计算机， 这些人被称为脚本小子（script kiddies）。而真正有着丰富经验和编程技巧的黑客，则开发黑 客程序发布到网站或论坛（BBS）。还有一些人对黑客技术没有丝毫兴趣，他们把计算机仅 仅当做窃取金钱、商品和服务的辅助工具。(Some hackers destroy other people)

SIMULATION OF PACKET DATA NETWORKS USING OPNET In this paper we describe the use of the OPNET simulation tool for modeling and analysis of packet data networks.