Mr.Daozhi的博客

原创 多臂老虎机证明过程的两种解读视角

多臂老虎据算法是一种重要的在线学习算法，有很多应用场景。

原创 attack vector

vector 此处并不是向量的意思。的特定路径、方法或是情景。

原创 What is Scientific Mapping

A bibliometric analysis stage encompasses citation analysis, co-citation analysis, bibliographic coupling, co-word analysis, and co-authorship analysis that explores the links between research components, revealing interactions and structural connec

原创 The difference bewteen Neglect and Ignore

Neglect 是忽视或没有注意。Ignore 是故意忽略。

原创 aka 是什么意思

also known as=a.k.a也称为

原创 franchisor and franchisee

What is the difference between a franchisor and a franchisee?The “franchisor” is the person or corporation that owns the trade marks and business model. The franchisor licenses the use of the trade-mark and business model to the franchisee, usually in ex

原创 积分的导数公式

以下来自百科Enable GingerCannot connect to Ginger Check your internet connectionor reload the browserDisable in this text fieldRephraseRephrase current sentence2Edit in Ginger×

转载 值得推荐的经济学中文教材-转

值得推荐的经济学中文教材A-A+ 经济学理论2015-09-22 15:49:50来源：聂氏政经评论作者：聂辉华6350这是我多年前担任人大经济论坛版主时整理的书单，感谢多位版主的协助。这里只包括中文版，不含英文版或者翻译得不好的中文版。最近一版是2009年修订的，我先发布出来。这个学期我自己讲授《微观经济学原理》，会在近期再次更新。敬请关注“聂氏政经评论”微信公众号（ruc_nie）。一、入门读物/启蒙读物1、茅于轼：《生活中的经济学》，上海人民出版社1993年版，1998年暨南...

原创 道德风险/moral hazard & 逆向选择/adverse selection 的主要区别

Distinguishing Moral Hazard from Adverse SelectionIn both moral hazard and adverse selection, there is information asymmetry between the two parties. The main difference is when it occurs.In a moral hazard situation, the change in the behavior of one p

原创 The writing of introduction section

Usually or basically, this part is the first part of your paper ( or dissertation/thesis/report.) And it is very important for writing a good quality paper.There are some tips we can follow, such as :establish the context / background of your researc..

原创 唐诗宋词鉴赏-4

第四篇轻汗微微透碧纨，明朝端午浴芳兰。流香涨腻满晴川。彩线轻缠红玉臂，小符斜挂绿云鬟。佳人相见一千年。

原创 The difference between disinformation and misinformation

disinformation ：故意的假情报， i'ten'ti'o'namisinformation：非故意的假情报Disinformation is intentionally false or inaccurate information that is spread deliberately. It is an act of deception and false statements to convince someone of untruth. Disinformation sho.

原创 唐诗宋词鉴赏-3

第三篇 小重山 —章良能柳岸花明春事深。小阑红芍药，已抽簪。雨余风软碎鸣禽。迟迟日，犹带一分阴。往事莫沉吟。身闲时序好，且登临。旧游无处不堪寻。无处寻，唯有少年心。注：抽簪，指弃官隐退。...

原创 唐诗宋词鉴赏-2

第二篇 道引曲--龚自珍无情绪 ，无情绪。寂寞掩重门。银蜡心多才有泪，宝香字断更无痕，梨花浸黄昏。

原创 开个新栏目，唐诗宋词鉴赏

第一篇行香子·树绕村庄秦观树绕村庄，水满陂塘。倚东风、豪兴徜徉。小园几许，收尽春光。有桃花红，李花白，菜花黄。远远围墙，隐隐茅堂。飏（yang）青旗、流水桥旁。偶然乘兴、步过东冈。正莺儿啼，燕儿舞，蝶儿忙。Notes：行香子，词牌名，又名“爇心香”“读书引”。...

原创 混合互补问题-mixed complementarity problem-mcp，比线性互补和非线性互补更广泛

MCP is more general thanLinear Complementarity Problems(LCP) andNonlinear Complementarity Problems(NCP).The form of MCP is as follows:F(x) ⟂ lb ≤ x ≤ ubwhich meansx = lb, thenF(x) ≥ 0 lb < x < ub, thenF(x) = 0 x = ub, thenF(x) ≤ 0...

原创 关于几个箭头符号含义的介绍

最近读文献，发现几个箭头比较有意思，如下图。1）斜下方箭头和斜上方箭头，前者是从右逼近，后者是从左逼近。2）downward的箭头：3） ↦箭头↦is part of a function definition.4）=> derive...

原创 关于朴素贝叶斯的一个问题

原创 偏导符号的读法

是求偏导的常用表示符号，其读法参考wiki，可以如下：The symbol is variously referred to as "curly d", "rounded d", "curved d", "dabba", or "Jacobi's delta",[6]or as "del"[7](but this name is also used for the "nabla" symbol∇).It may also be pronounced simply "dee",[8]"part...

原创 集值映射（set -valued mapping)

Set-valued function由以上，x小于1/2,则F(x) 取值为（x+1/2）和（1/2-x），如图。比如，x=1/4，则F（x）有两个取值，即3/4和1/4。因而，F（x）是 aset-valued map or multivalued map or point to-set map or multifunction。注意这里F（x）是多值映射，但不是连续的。集值映射数学符号记为X....

原创 Vosviewer keywords mapping

Vosviewer keywords mappingIn VOSviewer: you will create a map based on theall keywords: the keywordsauthor keywords* – the keywords given by the authors

原创 Differences of 都市圈和城市群

城市群是新型城镇化主体形态，是支撑全国经济增长、促进区域协调发展、参与国际竞争合作的重要平台。In English, it should be calledcity cluster ormegalopolis(/ˌmɛɡəˈlɒpəlɪs/),都市圈是城市群内部以超大特大城市或辐射带动功能强的大城市为中心、以1小时通勤圈为基本范围的城镇化空间形态。metropolitan area...

原创 What is an estimator?

An “estimator” or “point estimate” is a statistic (that is, a function of the data) and a rule that is used to infer the value of an unknown parameter in a statistical model.Any statistic whose values are used to estimate is defined to be an estimator..

原创 Therefore, hence, so, then, thus

在写科技论文时候，我们经常遇到转折语句，需要使用“因此”来进行承t转，常用的词汇包括therefore, hence, so, then, thus， consequently等。但是在具体使用时候会有些混淆，下面的几个例子说的比较好，可以参考。例句：Therefore, as a result, so, then, consequentlyShe wasthereforeunable to find a solution. Soshe had to quit her job. I...

原创 加和公式（下标放在下方和上方，或者放在右方，），使用\limits

\sum\limits_{i=1}^n i^2 = \frac{n(n+1)(2n+1)}{6} 加和公式为∑i=1ni2=n(n+1)(2n+1)6\sum\limits_{i=1}^n i^2 = \frac{n(n+1)(2n+1)}{6}i=1∑n​i2=6n(n+1)(2n+1)​\sum\nolimits_{P_i \in Paths(I)} Probes(P_{i}) 加和公式为 ∑Pi∈Paths(I)Probes(Pi)\sum\nolimits_{P_i \in Paths(I)} P

原创 A template of Recommendation Letter

Recommendation LetterTo Whom it May Concern:I am pleased to recommend [name] for admission to your university for further studies. I am an associate professor of [department]at [univer]. She is one of the extraordinary students in my teaching ca...

原创 why is the sign-off of your email important?

When you are finishing an email to someone, who is maybe your client, your supervisor, your customer, your friend, etc., one question is that how to end up the mail with an appropriate format.The sign-off is much more important than you think, because i.

原创 每次读贾平凹的《纺车声声》都禁不住要哭出来。

喜欢看的朋友可以看看，http://www.yuedu88.com/zizaiduxing/36349.html那些场景总是能打动我，产生很多共鸣，想起儿时那些时光。这可能就是真正大师文字的力量，想这样的好书不多啊。

原创 larger,bigger,greater, higher difference

Correct:Everyone knows 5 is larger than 4.Correct:Everyone knows 5 is bigger than 4.Correct:Everyone knows 5 is greater than 4.Correct:Everyone knows 5 is higher than 4.you really can't go astray when deciding between larger, bigger, greater, and hig...

原创 what is difference among “actually,” “in fact,” and “indeed”?

Actuallyandin factboth mean that the other speaker has said something at least partially factually incorrect, and you are about to correct them.Indeedsignifies agreement.actually 和 in fact 是强调否定indee 是强调肯定。

原创 把事情做对，远不如做对的事

把事情做对，远不如做对的事

原创 两个L组成的括号？（取整符号）

符号向下取整和向上取整的符号：namely：floor(x) 和ceil(x)向下取整函数：小于或等于x的最大整数向上取整函数：大于或等于x的最小整数例子：x 下取整 上取整 −1.5 −2 −1 0.2 0 1 1.04 1 2 2.96 2 3 5 5 5 ...

原创 Illustration of Generating a Candidate Hash Tree, The most intuitive one !!!!!!!!!!!!

Illustration ofGeneratinga Candidate Hash Tree。Some other tricks you might want to know:Then the final hash tree for the above 3-itemset candidates is constructed as follows:d以上应该是最直观的Illustration ofGenerat...

原创 0-1分布revisit

以上供参考。

转载 pagerank 的介绍

以下文章来自博客：/* https://www.cnblogs.com/jpcflyer/p/11180263.html * /一、 PageRank 的简化模型我们先来看下 PageRank 是如何计算的。我假设一共有 4 个网页 A、B、C、D。它们之间的链接信息如图所示：这里有两个概念你需要了解一下。出链指的是链接出去的链接。入链指的是链接进来的链接。比如图中 A 有 2 个入链，3 个出链。简单来说，一个网页的影响力 = 所有入链集合的页面的加权影响力之和，用公式表.

原创 Difference between accuracy and precision

Accuracyand precision are two important factors to consider when taking datameasurements. Both accuracy and precision reflect how close a measurement is to an actual value, but accuracy reflects how...

原创 将字符型分类变量数据转换为数字格式

假设我们有如下dataframe，名字为student_weight：ordered_height = ['Short', 'Medium', 'Tall']#定义顺序，这里是这个次序可以对应，0：short；1,：Medium；2：Tall；最后一列Out1是字符型分类变量，无法直接被python函数使用，需要进行transform。步骤如下：student_weight_ta...

原创 利用python 读取excel文件并对数据进行描述统计分析

from pandas.core.frame import DataFrameimport osimport math os.chdir(" C:\\A")from openpyxl import load_workbookairport_df = load_workbook("all_activity.xlsx")sheets = airport_df.sheetnames...

转载 Difference Between Labor and Human Capital

When talking about production function, you should have clear delimitation of "labour" and "human capital". The following is a good explanation on this topic.Labor vs Human CapitalHumancapitali...

原创 Introduction of moving block bootstrap （MBB）algorithm

Because we can not use usual bootstrap sampling method to get subsamples from time series dataset, then the MBB was proposed to address this issue.Suppose we have the time series following :X1X_1X1​...