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本文件为VB公共模块,最常用的字母API FAC…
此文档为VB公共模块,封了多数常用的API,方便VB开发人员调用。包括注册表操作、磁盘、网络、窗体、文件等操作的API。模块内有简单使用说明。-this document for public VB module, the most commonly used letters of API to facilitate VB developers call. Including the registry operation, disk, network, forms, documents, etc API. A simple module for use.
- 2022-07-24 09:16:59下载
- 积分:1
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通信原理实验_Matlab仿真基础
为了更好地设计通信系统,我们需要对无线环境下收端信号的统计特性进行研究。考虑以下场景:环境中有很多障碍物,发射端至接收端没有视距可达路径。
假设收发端距离很远(500m以上),障碍物数量很大(N>50),并在空间中随机分布。同时假设各路反射信号到达接收端的强度相同(能量E=1),信号载波频率为1GHz,请进行仿真,探索以下问题:
(1)接收到的正弦波的相位服从什么分布?
(2)计算接收信号的幅度的均值和方差,并绘制其概率密度函数图。
(3)学习“Rayleigh分布”相关内容,并绘制参数为√NE的Rayleigh分布概率密度函数,计算其期望和方差的理论值。这些理论结果与仿真得到是否一致?
(4)固定障碍物的位置,让接收机分别以速度1m/s和10m/s的速度运动,绘制接收信号的包络随时间变化的曲线。并观察和对比两条曲线,能否有什么发现?(In order to better design the communication system, we need to study the statistical characteristics of the received signal in the wireless environment. Consider the following scenario: There are many obstacles in the environment, and there is no line-of-sight path from the transmitter to the receiver.)
- 2018-04-14 21:14:30下载
- 积分:1
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Python编程从入门到实践(高清中文版)
说明: python编程从入门到实践,详细解释了python的学习过程(From the beginning to the practice of Python programming, it explains the learning process of Python in detail)
- 2020-06-28 18:05:53下载
- 积分:1
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D-C
说明: flac3d自便模型,二次开发邓肯张模型,(The two time development of Duncan's Duncan Zhang model)
- 2020-10-08 08:47:36下载
- 积分:1
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控制远景方案!没有限制的长
vista options控件!!没有任何限制可免费长期使用!-Control vista options! ! There are no restrictions on long-term use free of charge!
- 2022-05-20 21:48:56下载
- 积分:1
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运用灰色关联分析测算关联度
说明: 运用灰色关联分析测算关联度,以江苏省能源消耗量为例进行测算(The grey correlation analysis was used to calculate the correlation degree, and the energy consumption of jiangsu province was taken as an example)
- 2019-06-23 12:06:45下载
- 积分:1
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gdsii-99a
说明: GDS Toolbox for MatLab 99
- 2020-06-25 20:20:02下载
- 积分:1
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Guide to FORTRAN 2008 Programming
Guide to FORTRAN 2008 Programming
- 2020-06-22 03:40:02下载
- 积分:1
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lianjia-master
说明: 实现在链家网相关信息的爬虫,python代码实现(Implementation of crawler Python code in chainhome)
- 2021-02-03 11:45:34下载
- 积分:1
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IM_sync_frame
说明: induction motor modeling in synchronous reference frame
- 2020-06-25 03:20:02下载
- 积分:1