Welding_PWHT_Sample-video

泡泡龙大战开始了，只要你能战胜每一关你就会有不可预知的惊喜，快快来吧。-Puzzle Bobble World War started, as long as you can overcome each clearance unpredictable and you will have a pleasant surprise, Come as soon as possible.

页面排序 数据挖掘 数据分析 机器学习 代码(pagerank data mining analysis ml code)

说明：  基于小波变换的多种去噪方法在matlab上的实现(based on wavelet transform multiple Denoising in the realization of Matlab)

这是一个培训管理系统-This is a training management system

这个文件包含博世SysReTeC MEMS BMI160传感器驱动程序，传感器驱动程序包包括BMI160.H、BMI160.C、BMI160X支持、H和BMI160A支持。(BMI160 drive and user manual)

读了重构之后的读书笔记。有兴趣的同学仅供参考。-Reconstruction after reading Reading Notes. Students are interested in is for reference only.

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)

气象站点数据按年汇总 处理分析气象数据使用(site data is aggregated by year)

DSP LF2407A 板上指示灯例程　已跑通了-DSP LF2407A indicator routines have been run on the board had

九直行九横列，共分成九个九宫格，每行列都由１到９、不能重复的阿拉伯数字组成，每个九宫格亦然(Nine, nine rows and nine columns are divided into nine sections. Each row is composed of 1 to 9 figures that cannot be repeated)