umatmises

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)

这是一个intel网络处理器ixp24xx系列中微码例子。用汇编写的。可以参考一下。-This is an intel network processor ixp24xx series micro-code examples. With the compilation was made. Can be examined.

设计一个矩阵相乘的程序，首先从键盘输入两个矩阵a，b的内容，并输出两个矩阵，-use for qiu niu

AUO 21.5 Matrix T215HVN01.1

独立游戏 minecraft 的源代码 及服务器 源代码.(The minecraft independent game source code and the server source code.)

是一个基于节约算法的VRP问题，比较适用于刚开始不久的初学者。(It is a VRP problem based on the saving algorithm)

说明：  雷达目标跟踪中的概率数据关联（PDA）算法，仿真场景采用何友的《雷达数据处理与应用》中的杂波场景 matlab程序 概率数据关联算法 雷达目标跟踪中的概率数据关联(Probability Data Association (PDA) algorithm in radar target tracking, the simulation scene adopts the clutter scene in he you's radar data processing and Application Probability data association algorithm of MATLAB program probability data association in radar target tracking)

将频域信号变换到波数域，希望可以帮助大家(Transform the signal in the frequency domain to the wavenumber domain)

说明：  用于生成回波以进行仿真研究，内含一些设定好的数据(Used to generate echo for simulation study)

运行于genesis2000，用作自动削铜皮上的防焊开窗使用(Running on genesis2000, used automatic cut copper solder on windows using)