原创 notes on ibm:dw"5 things you didn't know about ... Command-line flags for the JVM"

article original address:http://www.ibm.com/developerworks/java/library/j-5things11/index.html DisableExplicitGC fl

2020-07-04 15:34:47 1

原创 css: basics and text

  three types of selector   1. directly apply to html element.     p{ text-align: center; color: red;

2020-07-04 15:34:47

原创 C++ styles

1. An entity (function, class, etc) only has one compact responsibility.     design small class, and seperate incompact

2020-02-25 03:01:19

原创 basis of javascript

Javascript and Java are alike each other, including control statements and String object. All control statements such a

2020-02-25 03:01:19

原创 refresh iframe

code : html> <head> <title>hello iframe reload</title> </head> <mce:script language="JavaScript"><!-- function chan

2020-02-25 03:01:19

原创 Notes:java comile flag

article original address:http://www.ibm.com/developerworks/java/library/j-5things11/index.html DisableExplicitGC fl

2020-02-25 03:01:18

原创 Pure Virtual Functions and Abstract Classes

Original Link:http://msdn.microsoft.com/en-us/library/aa273534(v=vs.60).aspx C++ Specific —> An abstract class contai

2020-02-25 03:01:18

原创 inline-block

place many blocks in one line.   code: #left{ margin-left:20px; position: relative; top:20px; display: inline-b

2020-02-25 03:01:18

原创 Use awk to do simple statistics job

Basic use Example: print requred fields awk -F "/t" '$2>30{print $3"/t"$4}' a.txt > b.txt This sentence means the sep

2018-08-25 14:43:49 2

原创 Intuition of P-value

Let's use an example to demonstrate it.  We suppose a coin flip is fair(null hypothesis: H: p=0.5).  We begin to exper

2018-08-25 14:43:48 1

原创 show , append enviroment variables

Show all enviroment variables Command:env   Show local environment variables Command:set   Append environment variables

2018-08-25 14:43:48

原创 design a regress function whose coeficients satisfy certain conditions

Problem:   Given n points (x_1, x_2, ...x_n) as independent variables, where x_i can be a value or a vector,  and the d

2018-08-25 14:43:46 3

原创 Using Interval Estimation to set prior value in Online Learning method

The below method is a common way to compute ctr:                              ctr = (baseClickNumber + clickNumber)/(ba

2018-08-25 14:43:46

原创 多路歸併排序

將一個大文件分割爲小文件，對小文件進行內存排序，在對排序後的小文件做合併即可。關於合併，可以採用堆來實現，堆中存儲每個小文件中的最小值，以此從堆中取出最小值，輸入到結果文件，同時從最小值對應文件中取出下一個最小值，保持堆依然存儲每個小文件

2018-08-25 14:43:46

原创 explanation of the summary of linear model

0: residuals distribution 1: coefficients 2. stdandard variance of coefficients 3: using t-test to test the signific

2018-08-25 14:43:46