PPM

《The Little SAS Book 中文版》以大量实例、清晰简明的解释以及尽可能少的术语来介绍SAS语言，且大部分的功能均来自Base SAS。Base SAS包含了所有程序员所使用的核心功能。(The Little SAS Book Chinese Edition introduces SAS language with a large number of examples, clear and concise explanations and as few terms as possible, and most of its functions come from Base SAS. Base SAS contains the core functions used by all programmers.)

need code for network coding

用于r soft 初学者的学习资料，本资料包含rsoft软件基本的功能区介绍和简单实例讲解(Learning materials for r soft is a beginner)

讲解DSP编程的高级书本，适合初级和中级读者(DSP Programming on the advanced books, suitable for primary and secondary readers)

excel的使用教程，包含简单的excel的编程，以及很多公式算法的使用方法，是学习excel应用的很好的资料(the use of excel tutorial, including a simple excel programming, and many algorithms use the formula is applied to learn good information excel)

x64实现Thunk的新思路，兼容x86，目前能使用的第一份x64下的thunk代码。(x64 new ideas to achieve Thunk, compatible with x86, is currently able to use the first thunk code under x64.)

LINUX与UNIX SHELL编程指南(LINUX_and_UNIX_SHELL_Programming_Guide)

说明：  振动信号的采集与预处理的详细系统设计方案(Vibration signal acquisition and pre-processing, system design program)

说明：  阿里巴巴暑期实习大礼包，简介了阿里巴巴的实习流程和往年笔试面试的题目。(Alibaba summer internship spree About Alibaba internship process and written examination and interview subject in previous years.)

说明：  《IEC61850应用入门》是一本帮助读者理解、掌握IEC61850知识内容和思想精髓的参考书。全书共分五章：第一章简单介绍常规变电站自动化系统的不足，主要介绍了IEC61850标准的内容、特点和发展趋势；第二章介绍面向对象的基本概念，OSI、TCP/IP网络模型，以太网技术基础，XML、XMLSchema基础和常用软件工具；第三章介绍IEC61850的分层信息模型、具体定义、配置方式与配置文件；第四章主要介绍MMS基础知识、IEC61850与MMS的映射关系、MMS与ASN.1编解码和MMS典型报文分析；第五章介绍GOOSE服务、IEC61850—9—2SV服务、简单网络时间协议和IEEE1("Introduction to IEC61850 application" is a reference book to help readers understand and master the knowledge content and ideological essence of IEC61850. The whole book is divided into five chapters: the first chapter briefly introduces the shortcomings of conventional substation automation system, mainly introduces the content, characteristics and development trend of IEC61850 standard; the second chapter introduces the basic concept of object-oriented, OSI, TCP / IP network model, Ethernet technology foundation, XML, XML schema foundation and common software tools; the third chapter introduces the layered information model and specific definition of IEC61850 , configuration mode and configuration file; Chapter 4 mainly introduces MMS basic knowledge, mapping relationship between IEC61850 and MMS, MMS and ASN. 1 encoding and decoding and MMS typical message analysis; Chapter 5 introduces goose service, iec61850-9-2sv service, simple network time protocol and ieee1)