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SQL
本书对SQL技术的使用和发展进行了全面的讨论。全书共分六大部分，其中第一部分到第五部分分别介绍了SQL的历史和SQL标准的变化，如何使用SQL获取、更新数据，如何构造数据库结构以及如何实现数据的安全方案等，并描述了如何使用ANSI标准中的嵌入式SQL。(This book SQL technology use and development of a comprehensive discussion. The book is divided into six large part to the fifth part of the first part of which introduced the history and the SQL standard SQL changes, how to use SQL to obtain, update data, how to construct the database structure and how to implement data security programs, and describes the How to use the ANSI standard for embedded SQL.)
- 2010-03-04 00:11:47下载
- 积分：1
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电子书制作
电子书制作chm教材说明(electronic book production materials note)
- 2005-02-11 00:08:11下载
- 积分：1
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Ada-Booted
人脸识别原理介绍 有一些算法介绍 并附加图解 适合初学者(language：English from university of British)
- 2010-01-17 00:25:55下载
- 积分：1
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3
说明： conv opt solution manual
- 2017-04-03 17:47:17下载
- 积分：1
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车桥耦合ansys分析
基于ansys的车桥耦合分析，对于车辆对桥梁挠度、加速度的影响模拟(Vehicle bridge coupling analysis based on ANSYS)
- 2020-10-22 21:07:22下载
- 积分：1
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Securing-DNS-
about dns system security system
- 2009-12-29 12:35:23下载
- 积分：1
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LCM1602A
To overcome the speed difference between the internal clock of KS0066U and the MPU clock, KS0066U
performs internal operations by storing control in formations to IR or DR. The internal operation is determined
according to the signal from MPU, composed of read/write and data bus (Refer to Table7).
- 2009-12-22 21:42:46下载
- 积分：1
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bcgsjy@linyiren
梁肇新的<编程高手箴言>，程序员必读()
- 2007-09-17 10:14:55下载
- 积分：1
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P020180608516798097666
BeiDou Navigation Satellite System
Signal In Space
- 2020-06-19 16:20:01下载
- 积分：1
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DynamicPowerQualityTestingTechnology
本文首先介绍了有源电力滤波器的基本结构和工作原理，并对一些常规的谐波电流检测方法的优缺点进行了比较。其次，针对传统的谐波电流检测方法的缺陷，提出将神经网络与基于噪声抵消原理的自适应谐波检测相结合，利用径向基函数运算量小、收敛快、无局部极小值等优点，构造了一种基于径向基函数神经网络的谐波电流检测方法，仿真结果表明该检测方法具有很好的动态响应及畸变电流检测精度。最后，设计了一套实验系统，对本文所采用的系统方案进行了实验验证。仿真表明，本文所采用的有源电力滤波器检测系统方案切实可行，能够较好地实现动态检测谐波和无功功率的目的。 (This paper, firstly, introduces the basic structure and principle of APF, and then makes comparison among some conventional harmonics detections methods. Secondly, contraposes the limitation of the traditional harmonic current detecting method based on neural network, presents the method that combines the neural network and auto adaptive harmonic current detecting method based on the principle of noise each other eliminating.As the characteristics that are small calculative quantity, fast converge, without local minimal point of Redial Basis Function (RBF), this dissertation forms a new harmonic current detecting method based on RBF. The simulation results show that the method has many advantages, such as good dynamic response, high accuracy. At last, A system is designed to verify the proposed APF scheme .The results of simulation show that the proposed APF scheme is practical and can detect harmonics and reactive power effectively. )
- 2009-05-03 10:26:45下载
- 积分：1
