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Description: 学生综合评定系统~有查询~报表~添加资料等等功能~小而且很实用~有需要的可以下载-This a comprehensive evaluate system of student. You can perform the following action:
inquire, add, list, etc. It s a mini but good system. try it!
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Size: 183296 |
Author: 陈靖 |
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Description: VFP的课程设计！学籍的！我的心血啊！做的不多~不过功能都是全的也可以修改~大家看看吧-An AFP course design! For the student status!
It s my painstaking work! It wasn t done much but it has all function and it can be modification~Read it please!
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Size: 96256 |
Author: 沉静 |
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Description: vf车辆管理系统，和大家分享一下。万年历程序，和大家分享一下。-vf vehicle management system, and to share with Members. Calendar program, and the U.S. share.
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Size: 773120 |
Author: koukou |
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Description: vf管理系统工资，和大家分享。vf管理系统工资，和大家分享-vf salary management system, and the U.S. share. vf salary management system, and the U.S. share
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Size: 6852608 |
Author: koukou |
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Description: VF写的人力资源管理系统,可以良好运行，欢迎下载，大家多交流-VF write the human resources management system that can run a good, welcome to download more than U.S. exchanges
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Size: 167936 |
Author: rayray |
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Description: 几个VFP程序实例，有时钟控制程序，学生信息管理等-VFP several instances, have clock control procedures, student information management
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Size: 1122304 |
Author: inhao |
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Description: 一些在vf下的小程序，用于vf的学习。是学习vf的助手。-Some vf the little program for vf learning. Vf' s assistant to learn.
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Size: 5120 |
Author: 张超 |
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Description: 基本的编程技术，VF的ppt课件，有利于这门语言的自学。-Basic programming techniques, VF' s ppt courseware is conducive to learning this language.
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Size: 497664 |
Author: huzhenyan |
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Description: VS2008 打开DBF文件源码，底层编写，不需要安装操作VF的dbf格式数据库所需的数据库操作引擎-VS2008 open source DBF file, no installation required for VF' s dbf format, database engine, database operations
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Size: 93184 |
Author: 刘硕 |
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Description: ：针对航空变频交流发电机电压调节器开展研究，分析对比了多种电压反馈检测方法及其特点，设计了基于
AD536A芯片的电压有效值检测电路，分析了电路的工作原理。这种电路的缺点是电路输出响应速度越快则输
出电压纹波越大。为解决这一问题，设计了减法电路构成的滤波电路，既能进行有效滤波，又不会引起电路的延
时。为解决滤波电路输出电压毛刺问题，采用了以二极管电路构成的去毛刺电路。利用Matlab软件工具对检测
电路的输入／输出进行拟合，得出了有效值检测电路的传递函数，为整个发电系统的闭环仿真模型的构建打下了
基础。闭环实验表明，采用了有效值检测电路，在变频、发电机电压畸变情况下的发电系统输出稳态和动态性能
得到了改善-Abstract：The auto—voltage regulator for the aircraft variable frequency (VF)power system is studied．
Some voltage—feedback detection methods are discussed．A RM S detection circuit based on AD536A is
presented and the principle of the circuit is analyzed．The output response speed conflicts with the out—
put voltage ripple of the circuit．To solve this problem ，a filter circuit composed by the m inus circuit is
presented for filtering the voltage ripple without the response delay．A circuit for eliminating noise com—
posed by the diode is presented and verified by experiments． Using a M atlab software，the input and
output signals of the RM S detection circuit are identified．The transfer function of the circuit is obtained
and used in the simulation for the aircraft AC power system．The closed 1oop experimental results indi—
cate that the system output steady and dynam ic performance with the variable frequency and the genera—
tor voltage distortion is improved by using the RM S det
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Size: 395264 |
Author: wzh |
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Description: 非常完整的AD654开发指南，可以帮助开发者实现VF转换软件和硬件的实现，及其相关注意要点。-The very complete AD654 Developer' s Guide, you can help developers achieve the VF converter software and hardware to achieve, and its related points to note.
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Size: 2774016 |
Author: 张思 |
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