CPPpdf

说明：  micro chip的电机资料，主要是交流电机 AC Induction Motor Fundamentals (electrical micro chip information, mainly AC Motor AC Induction Motor Fundamentals)

文针对 INS/ GPS舰船用组合导航系统进行 研究,为提高 INS 误差的修正精度,采用高精度 GPS姿态测量系统为 INS提供外部修正信息,以增 强系统的观测量.在对自适应卡尔曼滤波器分析的 基础上,提出了一种新的基于新息估计的自适应卡 尔曼滤波算法,以解决外部量测噪声出现不确定强 度变化问题.(Text for the INS/GPS navigation system for ships to study, to improve the accuracy of INS error correction, using high-precision GPS attitude measurement system for the INS amended to provide external information to enhance the system of observations. In the adaptive Kalman filter Based on the analysis, a new interest rate is estimated based on the new adaptive Kalman filter algorithm to solve the external uncertainties, the measurement noise intensity change.)

PSpice软件的培训教材，经典入门的资料！(PSpice software, training materials, the classical entry information!)

说明：  SQL语言简明教程 一个学习SQL语言不错的教程 为PDF文件格式 讲述了SQL语言的概貌特点、SQL的数据查询数据定义数据操纵数据控制功能。简明扼要，适合初学数据库者学习、参考。(Concise Guide to the SQL language SQL language learning a good guide to the PDF file format on the SQL language features of a picture, the data query SQL Data Definition Data Control data manipulation functions. Concise, database suitable for beginners learning, reference.)

正则表达式，精通正则表达式，第三版，非常好的学习正则表达式的书籍(Regular expressions, mastering regular expressions, Third Edition)

本文通过对男性和女性声音的语音特征的研究，发现男女声的基音频率存在较大的差异，并设计了基于基音频率分析的男女声识别系统。男女声识别系统由以下三个模块电路构成：话筒放大器，低通滤波器，半波整流电路，单片机测量控制模块。话筒放大器采用NE5532P音前置芯片，对语音信号进行放大；八阶低通滤波器MAX293完成基音信号的提取；单片机STC12C5410AD实现频率测量和控制输出功能。经仿真与电路实测，男女声的识别效果良好。(In this paper, the voices of male and female voice characteristics of the findings of a study of the fundamental frequency of the sound of men and women there is a big difference, and the design of frequency analysis based on the pitch of the voice recognition system for men and women. Voice Recognition System for men and women from the circuit the following three modules: the microphone amplifier, low-pass filter, half-wave rectifier circuit, single-chip measurement control module. NE5532P sound using the microphone pre-amplifier chip amplification of voice signals eight MAX293-order low-pass filter to complete the extraction of pitch signal STC12C5410AD single-chip realization of the frequency of measurement and control output. By circuit simulation and measurement, the identification of male and female voices well.)

说明：  该书于2017年2月由机械工业出版社正式出版,凝聚了徐政教授和近20名团队成员多年来的心血.第二版在第一版的基础上,有了较大篇幅的扩充,在系统性和完整性方面得到了加强,符号和术语也得到了进一步规范.该书系统讲述了柔性直流输电的理论和应用.内容包括柔性直流输电系统的特点和应用,(The book was officially published by the Machinery Industry Press in February 2017, and it has gathered the hard work of Professor Xu Zheng and nearly 20 team members for many years. The second edition has a larger expansion on the basis of the first edition. The system and integrity have been strengthened, and the symbols and terminology have been further standardized. The book system describes the theory and application of flexible DC transmission. The content includes the characteristics and applications of flexible DC transmission systems.)

说明：  卫星阵馈反射面多波束天线赋形波束的性能分析(Satellite front-fed reflector multi-beam antenna beam-forming performance analysis)

帮助umat学习者快速入门，并且详细理解umat的内在运行机制(Umat help learners QuickStart, and a detailed understanding of the inner workings of the mechanism umat)

梁肇新的<编程高手箴言>，程序员必读()