固体中的超声波

说明：  详细介绍了用VC.NET开发城市基础地理数据库的实例，用于城市测绘，城市基础地理系统建设的重要参考。(Described in detail with the development of urban infrastructure VC.NET examples of geographic database for urban mapping, urban infrastructure an important geographic reference system.)

说明：  智能视频监控系统目标检测和跟踪技术分析研究(Intelligent video surveillance system target detection and tracking of technical analysis)

说明：  C++大学基础教程，北京邮电大学电信工程学院，计算机技术中心(Essentials C++ University, Beijing University of Posts and Telecommunication Engineering, Computer Technology Center)

本PDF内有100道C++基础知识的编程，讲述了各种情境下的编程方法，为初学C++着提供良好的平台实例。(This PDF is 100 basic knowledge of c++ programming, programming method, tells the story of a variety of situations for beginners c++ provides a good platform for instance.)

lua程序设计，lua入门最经典的电子书，高清版本(lua programming, lua Getting the most classic books, HD version)

Qt Designer应用东软培训资料，对初学者很有用。这是第二部分。(Qt Designer application Neusoft training materials, useful for beginners. This is the second part.)

该文件为ansys常见错误提示及其解决办法(ANSYS common operation errors and their solutions)

这本书延伸科学畅销书“全球定位系统 - 理论与实践”，以涵盖全球导航卫星系统（GNSS），包括俄罗斯GLONASS，欧洲伽利略系统，以及其他系统。书是指在一般意义到GNSS来描述各种现有参考系统的坐标和时间，卫星轨道，卫星信号，可观察，数学模型的定位，数据处理，和数据转换。本书是一本大学级入门教材，目的是作为学生的参考以及为专业人士和科学家在大地测量领域，测量工程，导航和相关学科。(This book extends the scientific bestseller GPS- Theory and Practice to cover Global Navigation Satellite Systems (GNSS) and includes the Russian GLONASS, the European system Galileo, and additional systems. The book refers to GNSS in the generic sense to describe the various existing reference systems for coordinates and time, the satellite orbits, the satellite signals, observables, mathematical models for positioning, data processing, and data transformation. This book is a university-level introductory textbook and is intended to serve as a reference for students as well as for professionals and scientists in the fields of geodesy, surveying engineering, navigation, and related disciplines.)

1947年罗斯威尔飞碟坠毁事件相关报道 内容根据个人自述和会谈记录的提供者 Matilda O Donnell MacElroy （马蒂尔达·欧’丹奈尔·马克艾罗伊） （英文）编辑整理 Lawrence R. Spencer （劳伦斯·斯宾塞） 主体部分内容摘录、翻译、编辑 一个中国人 第 2(1947 Roswell UFO crash reports related to the contents of records under the Personal Statement and talks provider Matilda O' Donnell MacElroy (martir Daou ' 丹奈尔马克Yiluo Yi) (English) edited by Lawrence R. Spencer (Lawrence Spencer) of the main part of the extract, translation, editing a Chinese 2)

基于高斯过程的机器学习，其中包括回归问题和分类问题(machine learning)