Part I:equals() (javadoc) must define an equivalence relation (it must be reflexive, symmetric, and transitive). In addition, it must be consistent (if the objects are not modified, then it must keep returning the same value). Furthermore, o.equals(n…

heyheyhey ~~ It has been a long time since i come here again...whatever today i will summerize some methods of sort with java what are so important for coder. The codes below are all compiled successfully and have the right results 一. insert sort --…

作者:X Wang 出处:http://www.programcreek.com/2013/09/top-10-methods-for-java-arrays/ 转载文章,转载请注明作者和出处 The following are top 10 methods for Java Array. They are the most voted questions from stackoverflow. 0. Declare an array String[] aArray = new String[5…

1.问题:    在dealloc方法中使用[self.xxx release]和[xxx release]的区别? 用Xcode的Analyze分析我的Project,会列出一堆如下的提示:Incorrect decrement of the reference count of an object that is not owned at this point by the caller 仔细看了下代码,都是在dealloc方法中使用了[self.xxx release]这样的语句引起的,把…

In C#, extension methods enable you to add methods to existing class without creating a new derived class. Extension methods 要求: Define a static class to contain extension method. This class must be visible to client code. Implement the extension met…

   Kinds of methods        Constructors      Type constructors      Overload operators      Type conversions (for implicit and explicit casting)      Extension methods      Partial methods.              1. Instance Constructors and Classes (Reference…

http://www.powerobjects.com/2015/09/23/dynamics-crm-alert-and-notification-javascript-methods/ Before CRM 2013, if you wanted to alert a user on a form within the browser, the only method available was the standard JavaScript alert. This method would…

AX7: HOW TO USE CLASS EXTENSION METHODS   To create new methods on a standard AX class without customize, follow the steps below: Create a new “public static class” following the name pattern “YourClassName” + “_Extension”. 1 2 3 4 5 6 7 8 9 public s…

Consider a type that will print out a message when it’s finalized, and that has a Dispose method which will suppress finalization: class DisplayOnFinalize : IDisposable {     public void Dispose() { GC.SuppressFinalize(this); }     ~DisplayOnFinalize…

1. 蒙特卡罗方法的基本思想 蒙特卡罗方法又叫统计模拟方法,它使用随机数(或伪随机数)来解决计算的问题,是一类重要的数值计算方法.该方法的名字来源于世界著名的赌城蒙特卡罗,而蒙特卡罗方法正是以概率为基础的方法. 一个简单的例子可以解释蒙特卡罗方法,假设我们需要计算一个不规则图形的面积,那么图形的不规则程度和分析性计算(比如积分)的复杂程度是成正比的.而采用蒙特卡罗方法是怎么计算的呢?首先你把图形放到一个已知面积的方框内,然后假想你有一些豆子,把豆子均匀地朝这个方框内撒,散好后数这个图形之中有多少…

什么是默认方法-Default Methods 简单的说,就是可以在接口中定义一个已实现方法,且该接口的实现类不需要实现该方法: 如下示例: interface GreetingService { void sayMessage(String message); //可以在接口中定义默认方法 default void sayHello(){ System.out.println("Hello"); } } //实现类不需要实现接口中的默认方法 class GreetingService…

Scenario You want to use just the methods you like, without inheriting all the other methods that you’ll never need. This is possible with the borrowing methods pattern, which benefits from the function methods  call() and apply(). // call() example…

All object members are public in JavaScript. var myobj = { myprop : 1, getProp : function() { return this.myprop; } }; console.log(myobj.myprop); // `myprop` is publicly accessible console.log(myobj.getProp()); // getProp() is public too The same is…

XML Data Type Methods(一) /*XML Data Type Methods: 1.The query('XQuery') method retrieves(vt.检索,重新得到) a subset of untyped XML from the target XML instance 2.The value('XQuery',dataType) method returns a scalar value(标量值) from the targeted XML document…

主讲人 网络上的尼采 (新浪微博: @Nietzsche_复杂网络机器学习) 网络上的尼采(813394698) 9:05:00  今天的主要内容:Markov Chain Monte Carlo,Metropolis-Hastings,Gibbs Sampling,Slice Sampling,Hybrid Monte Carlo. 上一章讲到的平均场是统计物理学中常用的一种思想,将无法处理的复杂多体问题分解成可以处理的单体问题来近似,变分推断便是在平均场的假设约束下求泛函L(Q)极值的最优化…

主讲人 网络上的尼采 (新浪微博:@Nietzsche_复杂网络机器学习) 网络上的尼采(813394698) 9:16:05 今天的主要内容:Kernel的基本知识,高斯过程.边思考边打字,有点慢,各位稍安勿躁. 机器学习里面对待训练数据有的是训练完得到参数后就可以抛弃了,比如神经网络:有的是还需要原来的训练数据比如KNN,SVM也需要保留一部分数据--支持向量.很多线性参数模型都可以通过dual representation的形式表达为核函数的形式.所谓线性参数模型是通过非线性的基函数的线性…

Kernel Methods理论的几个要点: 隐藏的特征映射函数\(\Phi\) 核函数\(\kappa\): 条件: 对称, 正半定; 合法的每个kernel function都能找到对应的\(\Phi\) kernel matrix 以KPCA, KSVM, KLR为例, 理解如何利用kernel将线性算法转换成非线性的过程和思想, 具体的推导过程倒不是那么重要 表现定理: 最优解\(f\in RKHS \text{ of } \kappa\) 笔记列表: (1) 从简单的例子开始 (2)…

(本文假设你已经知道了hard margin SVM的基本知识.) 如果要为Kernel methods找一个最好搭档, 那肯定是SVM. SVM从90年代开始流行, 直至2012年被deep learning打败. 但这个打败也仅仅是在Computer Vision 领域. 可以说对现在的AI研究来说, 第一火的算法当属deep learning. 第二火的仍是SVM. 单纯的SVM是一个线性分类器, 能解决的问题不多. 是kernel methods为SVM插上了一双隐形的翅膀, 让它能翱翔…

几个重要的问题 现在已经知道了kernel function的定义, 以及使用kernel后可以将非线性问题转换成一个线性问题. 在使用kernel 方法时, 如果稍微思考一下的话, 就会遇到以下几个问题: 可以略过特征映射函数\(\Phi\), 只使用kernel function \(\kappa\)吗? 上一节的例子已经给出了答案, YES. 什么样的函数才能被当做kernel function来使用, 总不能只要可以将两个原始输入映射到一个实数上\(\chi^2 \to R\), 就能用…

java.lang.Exception: No runnable methods at org.junit.runners.BlockJUnit4ClassRunner.validateInstanceMethods(BlockJUnit4ClassRunner.java:169) at org.junit.runners.BlockJUnit4ClassRunner.collectInitializationErrors(BlockJUnit4ClassRunner.java:104) at …

11 Clever Methods of Overfitting and how to avoid them Overfitting is the bane of Data Science in the age of Big Data. John Langford reviews "clever" methods of overfitting, including traditional, parameter tweak, brittle measures, bad statistic…

HTTP works as a request-response protocol between a client and server. A web browser may be the client, and an application on a computer that hosts a web site may be the server. Example: A client (browser) submits an HTTP request to the server; then…

Deep Learning Methods for Vision CVPR 2012 Tutorial  9:00am-5:30pm, Sunday June 17th, Ballroom D (Full day) Rob Fergus (NYU), Honglak Lee (Michigan), Marc'Aurelio Ranzato (Google) Ruslan Salakhutdinov(Toronto), Graham Taylor(Guelph), Kai Yu(Baidu)  O…

注: 本文是对<IPython Interactive Computing and Visualization Cookbook>一书中第七章[Introduction to statistical data analysis in Python – frequentist and Bayesian methods]的简单翻译和整理,这部分内容主要将对统计学习中的频率论方法和贝叶斯统计方法进行介绍. 本文将介绍如何洞察现实世界的数据,以及如何在存在不确定性的情况下做出明智的决定. 统计数据分析…

安装Git客户端后,进行PULL时报如下错误 disconnected no supported authentication methods available(server sent: publickey,keyboard interactive)解决方案 因为TortoiseGit和Git的冲突 我们需要把TortoiseGit设置改正如下. 1.找到TortoiseGit -> Settings -> Network 2.将SSH client指向~\Git\usr\bin\ssh.e…

Advantage Unlike constructors, they have names. (BigInteger.probablePrime vs BigInteger(int, int, Random) They are not required to create a new object each time they're invoked(Flyweight pattern). This ensures that a.equals(b) if and only if a = = b.…

Principle To offer the benefits of encapsulation you should always expose private field with public accessor method. Correct Implementation // Encapsulation of data by accessor methods and mutators class Point { private double x; private double y; pu…

Static utility methods are particularly good candidates for generification. The type parameter list, which declares the type parameter, goes between the method's modifiers and its return type. // Generic method public static <E> Set<E> union(S…

Java Native Interface(JNI) allows Java applications to call native methods, which are special methods written in native programming languages such as C or C++. Historical usages of native methods Access to platform-specific facilities such as registr…

Principle readObject method is effectively another public constructor, and it demands all of the same care as any other constructor. Just as a constructor must check its arguments for validity (Item 38) and make defensive copies of parameters where a…