1.1 information is bits + context All computer programs are just a sequence of bits, each with a value of 0 or 1, organized in 8-bit chunks called by bytes. 8 bits = 1 byte All files is binary files. 1.2 Programs are translated by other programs into…

prcesssor在运行时,假设program counter的值为a0, a1, ... , an-1,每个ak表示相对应的instruction的地址.从ak到ak+1的变化被称为control transfer.一系列的control transfers被称为control flow. exceptions是指一些event,这些event表明当前的system.processor或executing program存在某些状况(详见1.2).exceptions会导致control fl…

2.1. Features //gradle特性 Here is a list of some of Gradle's features. Declarative builds and build-by-convention At the heart of Gradle lies a rich extensible Domain Specific Language (DSL) based on Groovy. Gradle pushes declarative builds to the nex…

p_511 编译器在没有指示下,会做‘ safe optimization',因此有些优化在没有参数的指示下是不会对代码做优化的,故在程序中应该避免某一类代码,因为它们妨碍了编译器做优化. optimization blocks: aspects of programs that can severely limit the opportunities for a compiler to generate optimized code; 两类optimization blocks: 1.memo…

  We would like to introduce Gradle to you, a build system that we think is a quantum leap for build technology in the Java (JVM) world. Gradle provides: //gradle构建是在java虚拟机中构建技术的巨大飞跃 A very flexible general purpose build tool like Ant.   //像ant一样可以灵…

平时不学习,期末火葬场. 一周时间靠王道考研和各路 pdf 自学计网,留下的提纲都在这里了.全是干货.全文 pdf 可以在这里下载:http://cloud.billc.io/s/xNHarppQPGi3gSz 文章很长,建议在左侧打开目录导航.水平有限,如有错误,敬请指正.祝你备考愉快.Collected by Bill Chen, 2019.12, East China Normal University 原文地址:https://billc.io/2020/01/computer-netw…

PART I GROUNDWORK CHAPTER 1 Introduction CHAPTER 2 One on One (101) CHAPTER 3 Overview of the Internet CHAPTER 4 More Than Two PART II FOUNDATIONS CHAPTER 5 Issues in Networking Graphics CHAPTER 6 Sockets and Middleware CHAPTER 7 Middleware and Messa…

Definition 图像分割将一张图分为\(n\)个region, 需要满足下面5个条件 每一个像素都要属于一个region 每个region都是连通的 region与region之间没有交集 region内像素点具有相同的目标性质 不相邻的region的像素点目标性质不同 用于分割的两类性质: 不连续性与相似性 不连续性 使用这个性质进行分割时, 需要假设每个region边界像素的强度值(intensity)与背景/其他的region有明显的不同. 所以现在有两个问题了: 灰度图可以很方便地…

正则表达式(regular expression)--描述一种字符串匹配模式,可以用来检测一个字符串是否包含特定的子串.用其他字符串将其代替.提取出某个符合要求的子串. 正则表达式   由普通字符 和  元字符  组成. 普通字符: 普通字符包括没有显示指定为元字符的所有可打印或不可打印字符.其包括:大小字母.数字.标点符号和一些其他符号. 非打印字符: 特殊字符: 许多元字符要求在试图匹配它们时特别对待.若要匹配这些特殊字符,必须首先使字符"转义",即,将反斜杠字符 (\) 放在它们…

原文 OpenGL Projection Matrix Related Topics: OpenGL Transformation Overview Perspective Projection Orthographic Projection Updates: The MathML version is available here. Overview A computer monitor is a 2D surface. A 3D scene rendered by OpenGL must b…