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did
双重差分估计
双重差分模型（difference-in-difference，DID）近年来多用于计量经济学中对于公共政策或项目实施效果 的定量评估。
通常大范围的公共政策有别于普通科研性研究，难以保证对于政策实施组和对照组在样本分配上的完全随机。非随机分配政策实施组和对照组的试验称为自然试验（naturaltrial），此类试验存在较显著的特点，即不同组间样本在政策实施前可能存在事前差异，仅通过单一前后对比或横向对比的分析方法会忽略这种差异，继而导致对政策实施效果的有偏估计。(Quantitative evaluation of policy or project implementation effect. Generally, a wide range of public policies is different from general scientific research, and it is difficult to ensure that the sample allocation for the policy implementation group and the control group is completely random. The non-randomly assigned policy implementation group and the control group are called natural trials, which have significant characteristics, i.e. there may be prior differences between the different groups of samples before the implementation of the policy, and this difference will be ignored only through a single pre-and post-comparison or horizontal comparison analysis method, which leads to the policy. Biased estimation of implementation)
- 2020-07-03 20:00:01下载
- 积分：1
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彩色TFT液晶显示控制电路设计及其ASIC实现
彩色TFT液晶显示控制电路设计及其ASIC实现-TFT color LCD control circuit design and ASIC realization
- 2022-03-23 19:32:39下载
- 积分：1
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Explain FHSS and DSSS with Examples
Explain FHSS and DSSS with Examples
- 2018-09-18 21:53:09下载
- 积分：1
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这个是Xilinx编程的源码，是Bristol大二时写的．
这个是Xilinx编程的源码，是Bristol大二时写的．-Xilinx is the programming source code, is sophomore at Bristol writes.
- 2022-11-23 21:55:04下载
- 积分：1
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Matlab 2016b Win64 Crack
这是一个完整的matlab安装包，并且是2016b的最新版本，中文，界面很清楚，很好用(This is a complete matlab installation package, and is the latest version of 2016b, Chinese, the interface is very clear, very easy to use)
- 2017-07-21 10:35:25下载
- 积分：1
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word_aligner_8bit_test
说明： CMV2000的对齐模块，适用于其他对齐模块，自行修改(CMV2000 alignment module, suitable for other alignment modules, self-modifying)
- 2020-06-16 07:00:01下载
- 积分：1
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Qam_modulation
matlab 16 qam 调制的代码。将调制信号先分成IQ两路，再进行信号的调试。(Matlab 16 QAM modulation code. The modulation signal is first divided into two IQ paths, and then the signal is debugged.)
- 2017-10-04 09:58:34下载
- 积分：1
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often went to the Forum and friends may have such an experience when you see a g...
经常去论坛的朋友可能都有这样的体会，当看到好的帖子特别是贴图时，想 把它转贴到另一个论坛特别麻烦，要进行好多鼠标与键盘操作，当有上十张图片 时真是令人头痛的事情。 此软件就是针对这种情况而设计，你只需要在想要的图片上点一下鼠标就可 提取图片链接并形成论坛UBB标签，进入发贴页面再点一下鼠标就可将获取的内容 发出去。使用该软件使以往烦琐的转贴操作变得轻松简单，你就尽情的享受从中 带来的乐趣吧！ -often went to the Forum and friends may have such an experience when you see a good message, especially textures, wants to turn it into another forum posted particular trouble, the need for a lot of mouse and keyboard operation, when on 10 pictures is really a headache thing. This software is the view of this situation and design, you only need to want to point the pictures from the mouse can link pictures and formed Forum UBB label, sent into the pages again point the mouse can be given access to the content. The software enables the use of previously cumbersome operation posted becomes easily, you enjoy the fun from the fun!
- 2023-03-27 08:55:04下载
- 积分：1
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PROSAIL_5B_Matlab
说明： 辐射传输模型-prosail物理模型可反演叶面积指数(The radiation transfer model can be used to invert the leaf area index)
- 2021-04-24 14:48:47下载
- 积分：1
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负荷预测无线充电
用容积卡尔曼滤波的方法，对电动汽车无线充电的负荷进行预测。(The load of the wireless charging of electric vehicles is forecasted by volume Calman filtering.)
- 2020-07-11 00:08:54下载
- 积分：1
