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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.)

C++全套学习课件-PPT格式,适合于C++初学者学习使用(C++ a full learning courseware-PPT format, suitable for beginners learning to use C++)

一本非常NB的关于计算机的离散数学与应用书籍！(Discrete Mathematics and its Applications is a focused introduction to the primary themes in a discrete mathematics course, as introduced through extensive applications, expansive discussion, and detailed exercise sets. These themes include mathematical reasoning, combinatorial analysis, discrete structures, algorithmic thinking, and enhanced problem-solving skills through modeling. Its intent is to demonstrate the relevance and practicality of discrete mathematics to all students. The Fifth Edition includes a more thorough and linear presentation of logic, proof types and proof writing, and mathematical reasoning. This enhanced coverage will provide students with a solid understanding of the material as it relates to their immediate field of study and other relevant subjects. The inclusion of applications and examples to key topics has been significantly addressed to add clarity to every subject. True to the Fourth Edition, the text-specific web site supplements the subject matter i)

CPLD_FPGA的入门资料.pdf格式,非常清晰.不可多得的入门级资料.(CPLD_FPGA introductory information. Pdf format, is very clear. A rare entry-level information.)

OGRE 3D引擎所含设计模式之分析 OGRE 3D引擎所含设计模式之分析(not)

直流电机常用驱动电路,非常有用的电机驱动程序与电路，对于开发电机者非常有借鉴价值。(DC motor drive circuit used, very useful program with the motor drive circuits, motors for developers who are very reference value.)

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

VB书籍 推荐之作 力顶 有需要的速度下载(VB)

初始对准技术是惯性导航系统的关键技术之一，初始对准的快速性和精度直 接关系到捷联惯导系统的性能。论文以罗经对准方法在捷联惯导系统中的应用为 目的，深入地进行了理论、实验和应用研究。 理论上，由捷联式惯导系统误差模型开始，结合罗经对准原理，建立罗经对 准数学模型。在此基础上，设计算法和控制流程，并依据控制理论选择适当的控 制参数。 在理论分析之后，针对可能出现的多种外界条件进行模拟数据仿真实验验证 算法和参数选择的正确性。仿真实验结果表明:在SOOs内系统对准精度达到0.10 并目_适用十高纬度地区。 车载试验数据离线分析，试验中使用GPS测得的速度信息作为外测参考速 度信息，在车辆运动过程中对准系统保持工作状态。将导航解算得到的结果与 GPS测得的信息进行比较分析，导航精度与GPS精度相当，即速度精度0.2m/s 水平位置精度lOmo (StudyongyrocompassAlignmentforSINS)

说明：  王锡凡先生写的现代电力系统分析，研究生教材(Modern Power System Analysis, Graduate Textbook by Mr. Wang Xifan)