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juliangfa
说明: 设计一八木天线,振子数目为4,长度分别为:反射器长度0.39,主馈振子长度0.356,引向器长度均为0.3;反射器和主馈振子的距离0.265,主馈振子和第一引向器的距离0.2575,第一引向器和第二引向器的距离0.225。天线工作频率为400MHz,各振子分段数为9。
利用矩量法模拟该天线的电流分布,并绘制方向图。(A eight wood antenna is designed. The number of vibrators is 4 and the length is 0.39 for the reflector, 0.356 for the main feeder and 0.3 for the director. The distance between the reflector and the main feeder is 0.265, 0.2575 for the main feeder and the first director. The distance between the first director and the second director is 0.225. The working frequency of the antenna is 400MHz and the number of segments of each vibrator is 9.)
- 2020-02-20 22:53:54下载
- 积分:1
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WIN7_system
window 7操作系统的系统服务项的详细介绍,想优化以下系统服务的可以看看(operating system window 7 A detailed description of services, would like to optimize the following system services can look at)
- 2009-07-01 16:18:17下载
- 积分:1
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LV_SubPanel
说明: labview的子面板技术,实现在同一个面板上显示各个vi的前面板(The labview subpanel technology to realize in the same panel show each vi of the front panel)
- 2011-04-14 15:06:10下载
- 积分:1
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单摆减振
说明: 参考文献《Acceleration planning based anti-swing and position control for double-pendulum cranes》,实现单摆系统的软着陆,降低系统振动。(According to the references "Acceleration planning based anti-swing and position control for double-pendulum cranes", A soft landing of the pendulum system and vibration reduction is realized.)
- 2019-02-26 14:46:09下载
- 积分:1
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Python_IRC_bot
IRC Bot written in Python
- 2011-10-09 01:24:43下载
- 积分:1
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diveintopythonzh-cn-5.4b-code
python工具书查询,之前看到的,资料还不错,可以参考学习下(Reference books for python)
- 2020-06-18 07:40:02下载
- 积分:1
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HQ-N76E003
说明: 一个基于N76E003 的PWM线性调光程序(N76E003 PWM dimming)
- 2020-09-08 16:18:02下载
- 积分:1
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模极大值
用于实现小波变换模极大值去噪,信号为正弦信号添加高斯白噪声(It is used to denoise the modulus maximum of wavelet transform, and the signal is sinusoidal signal, adding Gauss white noise.)
- 2018-04-14 21:51:42下载
- 积分:1
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超市管理系统Delphi源代码(含控件)
Delphi超市管理系统,功能包括仓库管理、销售业绩管理、库存统计、进货记录、管理员权限设置、操作员数据表更新等,错误代码:
0000:未知错误
0001:操作员表打开错误
0002:名称字段内容为空
0003:代号(编码)字段内容为空
0004:代号(编码)字段内容已存在
0005:操作员数据表更新错误
0006:系统权限表打开错误
0007:权限不够
0008:业务员表打开错误
0009:业务员表更新错误
0010:商场及仓库表打开错误
0011:商场及仓库表更新错误
0012:商品资料表打开错误
0013:商品资料表更新错误
0014:型号字段内容为空
0015:数量或金额数据为空或非数字
0016:库存统计表更新错误
0017:库存期初表
0018:销售记录表
0019:库存统计表打开错误
0020:进货记录表打开错误
0021:进货记录表更新错误
0022:销售退货记录表更新错误
0023:销售退货记录表打开错误
0024:进货退货记录表更新错误
0025:进货退货记录表打开错误
0026:开始日期大于结束日期
0027:临时数据表
- 2022-02-10 04:07:26下载
- 积分:1
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Javachat
聊天软件,用java编写,类似QQ,方便快捷,好用。(Chat software, using java write, similar to QQ, convenient, easy to use.)
- 2009-11-23 13:20:07下载
- 积分:1