en.DM00024853

主要描述了MIMO-OFDM系统中的各项技术的介绍以及仿真代码，比如分集技术，无线信道模型、信道估计等。(This paper mainly describes the introduction of various technologies and simulation codes in mimo-ofdm system, such as diversity technology, wireless channel model, channel estimation, etc.)

超声变幅杆原理和设计,详细介绍了超声变幅杆的原理及设计，pdf电子书籍(the pricinple and design of the ultrasonic horn)

国家标准GBT21436-2008,为车载雷达的测试、试验，研发人员提供依据及参考。(National standard GBT21436-2008, for the vehicle radar testing, testing, R & D personnel to provide basis and reference.)

经典教材数据库系统概念，很多大学计算机系的研究生课程用书 (Classical concept of teaching materials database system, many university computer science graduate course books)

说明：  IDL（Interactive Data Language）交互式数据语言是进行数据分析、可视化表达和应用开发的第四代可视化。 本书包含详细的基础教程，新手适用。(This book is the basic course of IDL. It is comprehensive and suitable for novices.)

说明：  各种最小二乘法案例，对数学建模有一定帮助(Various cases of least square method)

一个很公寓意思的小树，大家看后一定感触良深！(A very interesting novel, everyone must laugh!)

Albero construction c++

使用excel制作自己需要的管理软件，使用excel制作 自己需要的管理软件(Using Excel to make the management software you need)

说明：  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.)