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Internet-based-examination-system
研究基于互联网的在线考试系统的设计与实现,解决在线考试系统中存在的试题仓库,智能组卷,自动保存等问题。(Of Internet-based online examination system design and implementation of online examination system to resolve questions that exist in the warehouse, intelligent test paper, auto-save and other issues.)
- 2011-09-20 23:34:33下载
- 积分:1
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1023
基于USB数据采集便携式心电监护仪的设计(The design of the portable ECG monitor based USB data acquisition)
- 2012-08-14 15:20:46下载
- 积分:1
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234
说明: PLC、变频器在中央空调节能改造中的应用,本人从事这方面工作,感觉帮助很大(PLC, inverter in the central air-conditioning energy saving application, I have engaged in this work, feeling very helpful)
- 2010-04-04 17:40:17下载
- 积分:1
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1553_Standard_Cn
1553驱动开发,介绍1553驱动开发的一些基础知识(1553 Driver Development, Driver Development 1553 introduction of some basic knowledge)
- 2008-04-20 16:02:05下载
- 积分:1
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code
说明: 求解二维波动方程,包括论文,公式依据和程序源代码(Solving two-dimensional wave equation, including papers, formulas and procedures based on source code)
- 2010-04-09 17:27:52下载
- 积分:1
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shortwavesignal
文中利用频谱分析与显示技术,设计适合短波信号的实时频谱分析仪。(In this paper, the use of spectrum analysis and display technology, design suitable for short-wave signals in real-time spectrum analyzer.)
- 2008-04-13 21:39:45下载
- 积分:1
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description.tar
a description for acoral(emcos)(2)
- 2010-07-28 15:16:02下载
- 积分:1
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based-on-SVPWMvectorcontrol
为了给变频调速系统提供必要的设计参数,依据空间电压矢量脉宽调制(SVPWM)基本原理,介绍了
异步电动机及 SVPWM 算法在 Matlab/Simulink 环境下的建模过程及基于矢量控制理论的变频调速系统动态
模型建立。详细地阐述了实现仿真的方法,并针对仿真中的关键问题及系统的仿真结果进行了分析。仿真结
果表明,采用该控制系统,电压及转矩波动小,转速响应迅速,系统的各项指标都满足电机实际运行特性要
求。其仿真算法对于实现数字化控制变频调速系统具有一定的价值。
(To provide the necessary design parameters for the actual motor control system, the modeling course of
voltage space vector pulse wide modulation(SVPWM)agrithmetic and AC motor under Matlab/Simulink environment
are introduced. The dynamic model of variable frequency speed regulating system based on vector control is
discussed according to the principle of SVPWM. The new method of realizing simulation, key problems and
results of the simulation are analyzed in detail. The experimental simulation results show that this system has
smaller fluctuations of voltage and torque, quicker response speed, and all of the indicators accord with the
performance of the actual motor. The simulation agrithmetic have value to realize controlling motor with digital
signal processing.
)
- 2021-04-21 10:48:49下载
- 积分:1
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zhineng
智能视频监控中的图像压缩与传输技术研究 智能视频监控中的图像压缩与传输技术研究(Intelligent video surveillance image compression and transmission technology in intelligent video surveillance image compression and transmission technology)
- 2011-05-21 01:18:37下载
- 积分:1
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report
微机课程设计报告(Computer curriculum design report)
- 2008-12-24 12:58:19下载
- 积分:1