1. 单例2. 模板3. 代理,装饰 (代理和装饰的区别)4. 状态…

Forty years of research[i] says yes, games are effective learning tools. People learn from games, and they will learn more from a game than from other forms of learning.[ii] However, most people don’t get whygames work, which causes them to dismiss g…

https://www.legendsoflearning.com/resource/31-game-based-learning-resources-for-educators/ Game based learning (GBL) offers proven benefits for student engagement and academic performance. But convincing some educators to include GBL in their curricu…

被废弃的单例的DCL双重检查加锁/* *单例模式 *单例模式,保证一个类仅有一个实例,并提供一个访问它的全局访问点. *加同步锁的单例模式,适合在多线程中使用. */ class Singleton{ private static Singleton instance; private Singleton(){}//构造函数为private,外类不能使用new来创建立此类的实例 public static Singleton getInstance(){//获得实例的唯一全局访问点 System…

学习活动管理系统:LAMS 一.总结 基于java的cms 二.LAMS Learning Activity Management System,学习活动管理系统. 数字化学习已经具有完整的发展方法来设计以内容为主.单一学习者.自我学习的学习对象.然而,对于如何设计出协同环境下,牵涉到分组学习者的序列化的学习活动,以及教师如何能轻易地再利用这些序列化学习活动的成熟方法方面的知识,在E-learning领域中还很欠缺.因此,教师教学服务为出发点的学习路径设计(Sequence)成为技术辅助主导下的…

7 Machine Learning System Design Content 7 Machine Learning System Design 7.1 Prioritizing What to Work On 7.2 Error Analysis 7.3 Error Metrics for Skewed Classed 7.3.1 Precision/Recall 7.3.2 Trading off precision and recall: F1 Score 7.4 Data for ma…

In Week 6, you will be learning about systematically improving your learning algorithm. The videos for this week will teach you how to tell when a learning algorithm is doing poorly, and describe the 'best practices' for how to 'debug' your learning…

http://blog.csdn.net/pipisorry/article/details/44119187 机器学习Machine Learning - Andrew NG courses学习笔记 Machine Learning System Design机器学习系统设计 Prioritizing What to Work On优先考虑做什么 the first decision we must make is how do we want to represent x, that is…

自动算法的机器学习: Machine Learning for Automated Algorithm Design. http://www.ml4aad.org/ AutoML——降低机器学习门槛的利器: https://zhuanlan.zhihu.com/p/27792859…

20162314 2017-2018-1 <Program Design & Data Structures>Learning Summary Of The Ninth Week Summary of Key Concepts A heap is a complete binary tree in which each element is greater than or equal to both of its children. Adding an element to a hea…

20162314 2017-2018-1 <Program Design & Data Structures>Learning Summary Of The Seventh Week Summary of Key Concepts A tree is a nonlinear structure whose elements are organized into a hierarchy. The order of a tree specifies the maximum number o…

20162314 2017-2018-1 <Program Design & Data Structures>Learning Summary Of The Fifth Week Summary of Key Concepts A collection is an object that gathers and organizes other objects. Elements in a collection are typically organized by the order o…

20162314 2017-2018-1 <Program Design & Data Structures>Learning Summary Of The Second Week Summary of teaching materials Searching is the process of finding a designated target within a group of items or determining that it doesn't exist. An eff…

20162314 2017-2018-1 <Program Design & Data Structures>Learning Summary Of The First Week Summary of teaching materials Algorithm analysis is the basic project of the computer science. Increasing function prove that the utilization of the time a…

20162314 2017-2018-1 <Program Design & Data Structures>Learning Summary Of The Eleventh Week Summary of Key Concepts In hashing, elements are stored in a hash table, with their location in thetable determined by a hashing function. The situation…

20162314 2017-2018-1 <Program Design & Data Structures>Learning Summary Of The Tenth Week Summary of Key Concepts An undirected graph is a graph where the pairings representing the edges are unordered. Two vertices in a graph are adjacent if the…

20162314 2017-2018-1 <Program Design & Data Structures>Learning Summary Of The Eighth Week Summary of Key Concepts A binary search tree is a binary tree in which, for each node, the elements in the left subtree are less than the parent, and the…

Lecture 11—Machine Learning System Design 11.1 垃圾邮件分类 本章中用一个实际例子: 垃圾邮件Spam的分类 来描述机器学习系统设计方法.首先来看两封邮件,左边是一封垃圾邮件Spam,右边是一封非垃圾邮件Non-Spam:垃圾邮件有很多features.如果我们想要建立一个Spam分类器,就要进行有监督学习,将Spam的features提取出来,而希望这些features能够很好的区分Spam.事实上,对于spam分类器,通常选取spam中词频最高的…

(1) Advice for applying machine learning Deciding what to try next 现在我们已学习了线性回归.逻辑回归.神经网络等机器学习算法,接下来我们要做的是高效地利用这些算法去解决实际问题,尽量不要把时间浪费在没有多大意义的尝试上,Advice for applying machine learning & Machinelearning system design 这两课介绍的就是在设计机器学习系统的时候,我们该怎么做? 假设我们实现了一…

w Learning PHP Design Patterns Much of what passes as OOP misuses getters and setters, and making accesspublic to them only breaks encapsulation.…

Learning PHP Design Patterns CHAPTER 1 Algorithms handle speed of operations, and design patterns handle speed of development. 算法处理程序运行速度,设计模式处理程序开发速度.…

Machine Learning System Design下面会讨论机器学习系统的设计.分析在设计复杂机器学习系统时将会遇到的主要问题,给出如何巧妙构造一个复杂的机器学习系统的建议.6.4 Building a Spam Classifier6.4.1 Prioritizing What to Work On首先是在设计机器学习系统时需要着重考虑什么问题.以垃圾邮件分类为例.1.确定用监督学习的方法进行学习和预测.2.确定关于邮件的特征.关于挑选特征,实际工作中,是遍历整个训练集,选出出现次数…

20182320<Program Design and Data Structures>Learning Summary Week9 1.Summary of Textbook's Content 1.1 Chapter 15:Tree 1.1.1 Concept of Tree: 'Tree' is a data sturcture,which is non-linear. It consists of nodes and edges. 1.1.2 Some important concep…

AMD - Learning JavaScript Design Patterns [Book] - O'Reilly The overall goal for the Asynchronous Module Definition (AMD) format is to provide a solution for modular JavaScript that developers can use today. It was born out of Dojo’s real world exper…

The Observer Pattern The Observer is a design pattern where an object (known as a subject) maintains a list of objects depending on it (observers), automatically notifying them of any changes to state. When a subject needs to notify observers about s…

The Singleton Pattern The Singleton pattern is thus known because it restricts instantiation of a class to a single object. Classically, the Singleton pattern can be implemented by creating a class with a method that creates a new instance of the cla…

The Module Pattern Modules Modules are an integral piece of any robust application's architecture and typically help in keeping the units of code for a project both cleanly separated and organized. In JavaScript, there are several options for impleme…

reference: uboot_dir/doc/README.distro Linux distributions are faced with supporting a variety of boot mechanisms,environments or bootloaders (PC BIOS, EFI, U-Boot, Barebox, ...). This makeslife complicated. Worse, bootloaders such as U-Boot have a c…

可以慢慢理解.. 对照JAVA class Singleton(object): def __new__(cls): if not hasattr(cls, 'instance'): cls.instance = super(Singleton, cls).__new__(cls) return cls.instance s = Singleton() print("Object created", s, id(s)) s1 = Singleton() print("Obje…

11.1  首先要做什么 11.2  误差分析 11.3  类偏斜的误差度量 11.4  查全率和查准率之间的权衡 11.5  机器学习的数据 11.1  首先要做什么 在接下来的视频中,我将谈到机器学习系统的设计.这些视频将谈及在设计复杂的机器 学习系统时,你将遇到的主要问题.同时我们会试着给出一些关于如何巧妙构建一个复杂的机器学习系统的建议.下面的课程的的数学性可能不是那么强,但是我认为我们将要讲到的 这些东西是非常有用的,可能在构建大型的机器学习系统时,节省大量的时间. 本周以一个垃圾邮件…