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成都市空气中的O3来源及分析 O3_air
成都市空气中的O3来源及分析，可用于大创项目(O3 source and analysis in air of Chengdu, which can be used in some projects)
- 2020-06-22 01:40:02下载
- 积分：1
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计算VaR
在各种边缘分布状态下，计算序列的风险值，尤其适用于极值理论。(Calculation of risk values)
- 2018-03-16 12:27:40下载
- 积分：1
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7.1 Bagging,RF&Adaboost
代码详细解释了bagging方法的运用，以及包含了详细的bagging代码(The code explains the application of bagging method in detail, and contains detailed bagging code.)
- 2019-05-23 13:28:17下载
- 积分：1
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bootRes包算相关系数
说明： R 语言 bootRes包算相关系数 计算bootstrapped 相关系数(calculate bootstrapped correlation)
- 2021-04-19 11:38:54下载
- 积分：1
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sir和无标度网络
SIR。。。。 传染病传播的SIR模型，很全，可直接应用仿真模拟
(SIR model the spread of infectious diseases, it is full, the simulation can be applied directly)(SIR model the spread of infectious diseases, it is full, the simulation can be applied directly)
- 2020-11-30 09:59:27下载
- 积分：1
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PSTR
说明： R Programming implementation of panel smoothing threshold regression model
- 2020-11-08 09:59:47下载
- 积分：1
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选择最近气象站
从plots文件中读取目标站点信息 从station文件读取气象站点信息 自动匹配距离目标站点最近的气象站名称(Automatically match the closest meteorogical station of subject plot.)
- 2019-04-18 10:59:48下载
- 积分：1
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R
说明： R语言舍选法、极坐标法、Box-Muller变换产生正态随机变量(R Language Rounding Method, Polar Coordinate Method and Box-Muller Transform to Generate Normal Random Variables)
- 2021-04-22 21:58:48下载
- 积分：1
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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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R_codes
说明： 该文档中包含大量代码，首先是一些R语言基本语法练习的，然后是一些机器学习相关的，最后是一些评分卡指标计算、建模相关的。(This document contains a lot of code, first some basic grammar exercises of R language, then some machine learning related, and finally some scorecard index calculation, modeling related.)
- 2019-02-13 14:25:46下载
- 积分：1
