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说明：  只需要在搜索框中输入英文的城市名称，就可以实时搜索该城市的天气情况。(Simply enter the name of the city in English in the search box to search the weather of the city in real time.)

rs232 config for pic18f97j60

本程序在VB环境下实现高斯投影变换，对于相关操作具有参考价值-The program in VB environment to achieve Gauss projection transformation, with a reference value for the relevant operation

实现SVG和APF的总能电能治理，适合初学者使用，使用dq电流控制(Realization of total energy management of SVG and APF)

闹钟提醒程序,主要用OnTimer进行控制.-Alarm clock to remind the procedure, the main control OnTimer.

距离多普勒算法，采用线性调频信号作为发射信号(Range Dopper Algorithm with chirp signal)

说明：  dwaita stotra ccsbcshbcsjhsjs sc cczc

说明：  DVC系统，包括编码端和解码端，三种边信息估计方法(DVC system, including encoder and decoder, three side information estimation methods)

用重标度极差法计算hurst指数的MATLAB程序(Calculation of Hurst by using rescaled range method)

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)