Statistical Models and Social Science

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Statistical Models and Social Science

1.1 Statistical Models and Social Reality KEY: complex society v.s statistical models relationship,data,descriptive accuracy With few exceptions, statistical data analysis describes the outcomes of real social processesand not the processes themselve…

Estimation of Non-Normalized Statistical Models by Score Matching

目录概主要内容方法损失函数的转换一个例子 Hyv"{a}rinen A. Estimation of Non-Normalized Statistical Models by Score Matching. Journal of Machine Learning Research, 2005. 概我们常常会建模如下的概率模型: \[p(\xi;\theta) = \frac{1}{Z(\theta)} q(\xi; \theta). \] 比如energy-based models.…

2.6. Statistical Models, Supervised Learning and Function Approximation

Statical model regression $y_i=f_{\theta}(x_i)+\epsilon_i,E(\epsilon)=0$ 1.$\epsilon\sim N(0,\sigma^2)$ 2.使用最大似然估计$\rightarrow$最小二乘 $y\sim N(f_{\theta}(x),\sigma^2)$ $L(\theta)=-\frac{N}{2}log(2\pi)-Nlog\sigma -\frac{1}{2\sigma^2}\sum_i\left(y_i-f_{\…

[zz]有哪些优秀的科学网站和科研软件推荐给研究生？

https://www.zhihu.com/question/37061410 如题,各位科研前辈,有没有一些好的科研网站或者适合科研人员用的软件以及APP,推荐给一只研一的菜鸡,帮助我们提高科研效率,了解更多知识.或者指点迷津,分享一些科研经验,让菜鸡少走弯路.欢迎分享,感激不尽!!! 6 条评论分享默认排序按时间排序 56 个回答 2230赞同反对,不会显示你的姓名 ljthyd食品科学.食品安全.食品加工话题优秀回答者食品… 2230 人赞同写几个常见的我觉得挺好的网站及软件,…

【SPSS】软件介绍

SPSS软件是美国斯坦福大学三位学生1968年研制开发的统计软件,SPSS是Statistical Package for Social Science(社会科学软件统计包)的缩写,2000年SPSS公司将英文全称修改为Statistical Product and Service Solutions(统计产品与服务解决方案). 常见统计图的绘制 1.分类数据和顺序数据的频数分布表现在某公司有如下数据(分析员工男女比率与工资占比): 数据说明: 性别 :1-女 2-男职称 :10-总经理…

Datasets for Data Mining and Data Science

https://github.com/mattbane/RecommenderSystem http://grouplens.org/datasets/movielens/ KDDCUP-2012官网 From kdnuggets Data repositories AWS (Amazon Web Services) Public Data Sets, provides a centralized repository of public data sets that can be seamle…

A Complete Tutorial to Learn Data Science with Python from Scratch

A Complete Tutorial to Learn Data Science with Python from Scratch Introduction It happened few years back. After working on SAS for more than 5 years, I decided to move out of my comfort zone. Being a data scientist, my hunt for other useful tools w…