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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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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
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wine
葡萄酒数据集， 基于Wine数据集的数据分析报告 R语言+实验结果文档(Wine datasets
Data Analysis Report R Language + Experimental Results Document Based on Wine Data Set)
- 2020-07-20 16:48:47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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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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GARCH in mean VAR
一篇论文的GARCH in mean VAR(GARCH in mean VAR of a published paper)
- 2020-06-19 01:00:02下载
- 积分：1
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ADSB_MATLAB
ADS-B接收，采用PlutoSDR板卡，基于matlab开发(ADS-B receives, uses PlutoSDR card, develops based on MATLAB)
- 2018-07-02 22:53:42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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xgboost
实现xgboost算法，对实现分类和预测具有良好的效果(The implementation of xgboost algorithm has a good effect on classification and prediction)
- 2017-06-22 15:04:02下载
- 积分：1
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SIR传染病模型
说明： 进行了常微分方程的建立，并模拟出经典的SIR模型曲线(The ordinary differential equation is established and the classical SIR model curve is simulated)
- 2020-04-10 11:02:43下载
- 积分：1
