SCATTER_PLOTV1.1

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)

大量的图标，做web开发的时候不用为找不到合适的图标而范悉了-A large number of icons, web development, when done do not have to find a suitable icon and noted a Fan

说明：  nodo lora con stm32 con codigo vuente(codigo fuente arduino lora stm32)

杨鉴现代信号处理英文ppt，主要学习现代信号处理。-Yeung Kam-modern signal processing English ppt, mainly in modern signal processing.

这是一个子波程序，在地震勘探相关的程序编写中常常会遇到编写相关的子波程序，该程序可作为参考-This is a sub-wave process, seismic exploration in the preparation of the relevant procedures usually encountered in the preparation of wavelet-related procedures, the procedures may be used as reference

说明：  使用MATLAB编写的fk函数，调用该函数可生成f-k谱图(The use of MATLAB written in FK function, call the function can generate F-K spectrum)

对于有尖峰的非高斯海杂波，有几种模型来进行拟合，比较流行的有对数正态分布、韦布尔分布和 K 分布等。该程序通过改进实测数据海杂波拟合PDF分布(Sea clutter fitting PDF distribution by improving measured data)

说明：  在vs2015中编译过的eigen开源库的编译文件(The compiled file of the eigen open source library compiled in vs2015)

s3c2440下的 UART程序 ADS编译 (s3c2440 under the ADS compiler s3c 2440 UART procedures of the RTC real time clock procedures ADS compiler)

data mining algorithm implementation