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Directions: Complete the passage below with the correct forms of the given words and...

2023-07-19 23:44:44
共1条回复
okok云

小题1:went missing

小题2:due to

小题3:disappearance

小题4:creatures

小题5:assumed

小题6:dismissed

小题7:made up

小题8:convincing

试题分析:题目是Reading部分的改编,主要考查对课文大意的把握。主要讲的是一个15岁男孩贾斯汀失踪的事情。警方正在加紧寻找线索,并排除了有外星人出现的可能性。在找到贾斯汀之前,警方不会放弃努力。

小题1:句意:警方已经加紧搜寻两天前在丹佛失踪的15岁男孩贾斯汀。go missing失踪,根据ago用一般过去时,故填went missing。

小题2:句意:人们对这个事件感兴趣,因为他们看到了奇怪的光线和关于外星人的报道,故填due to。

小题3:根据第一句可知,贾斯汀失踪了,有报道称,贾斯汀失踪时有外星人来过。disappearance消失,故填disappearance。

小题4:句意:贾斯汀妹妹凯莉回忆说,飞行器里站着许多白皮肤、黑眼睛的奇怪生物,creature生物,故填creatures。

小题5:句意:贾斯汀的妈妈认为凯莉是在做梦,并让她去睡觉了。assume假定,认为,故填assumed。

小题6:句意:警方已经排除了贾斯汀被外星人带走的可能性,仍在寻找其它的可能性。故填dismissed。

小题7:句意:负责此案件的侦探说人们有时会编造一些故事,实际上还有其它的可能性,比如谋杀。make up编造,组成,弥补,故填made up。

小题8:句意:警方不会放弃,直到他们找到有说服力的证据。convincing有说服力的,故填convincing。

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2023-07-19 21:27:061

这篇英语作文该怎么写呀?

本文基于悟空问答里我给别人的回答而来,那个回答并没有完全展开,有的朋友私信追问,所以特作此文以飨有此需求的朋友。请注意,本文所述观点颇有临时抱佛脚之意,但是只要你用的好,会对你本来一片空白的大脑有醍醐灌顶之效,练熟了,应该可以让你在英语作文考试里至少得到及格分。下述写作套路除了写信等特定格式无法应用外,基本可以用来处理各种文章类型:记叙文、说明文、议论文等。套路格式如下:文章分为三段。第一段要对给出的题目进行定性的评价(即表达自己认为这个题目中的事物或人物或者话题如何如何)。第二段则根据第一段定性的评价,给出具体的理由来支持这个评价(列举理由时,可以用这几个词来排列:firstly首先,secondly第二,thirdly第三.....Lastly最后)。一般来说,理由的多少和理由的详细程度要看题目对字数的要求了。第三段即结尾部分,我们要换一种说法来重复一下自己的观点。有时,还可以加一些句子询问读者对此话题的意见。有的朋友看到了不相信就这个套路就行了?下面给你举几个例子看看。第一个例子题目是个议论文的话题:吸烟应不应该禁止?按照套路,可以这样来应付(具体字数,细节程度请根据考试题目进行调整):第一段,写出对题目的评价:Whether smoking should be banned (stopped) is a very hot topic today. In my opinion, I think smoking should be banned.第二段,写出理由支持自己的评价:I have several reasons to say. Firstly, smoking is very dangerous to the smokers" health. It is very harmful to the smoker"s lungs. secondly, smoking is harmful to non-smokers. when a person is smoking beside you, you are also harmed. Lastly, smoking costs a lot of money. We can use the money to do many meaningful things.第三段,换种说法重复自己的评价:From what I said, you can see smoking really should be banned. What"s your opnion?议论文的题目可以用这个套路,那么记叙文的题目可以吗?给你再看一个例子。题目是:What happened to you on New Year"s Day?(元旦你发生了什么)。按照套路如下(具体字数,细节程度请根据考试题目进行调整):第一段对题目给出总的评价:What happened to me on New Years" Day? Well, too many things happened to me that day. I really think it was a bad day.第二段,给出理由支持自己的评价:Firstly, I lost a lot of money in the subway on my way home. Secondly, I broke up with my girlfriend. Thirdly, I was fired by my boss on that day.第三段,重复评价:So you see, I really had a bad New Year"s Day.好了,授人以鱼不如授人以渔,让你背诵文章来在考试中碰运气,不如让你知道一个写作套路来应付。当然,这个套路基本上是临时性的对策,真正提高写作水平还是要多积累基础的词汇和语法结构知识。但是对于一些中考和高考的学生来说,未尝不可以善加利用。(本人文章皆来源于自己的教学实践,个人观点,仅供参考。欢迎转发,但是请保留出处!)
2023-07-19 21:27:162

The Craze for Certificates Directions 英语作文 在线等 跪求

Campus Certificates craze If you just randomly ask a student on campus what he is busy doing ,very possibly, he mayanswer that he is preparing for a certificate of some kind.Inverstigating a litte more ,you will find that this has become a new craze among college students.The reasons behind the phenomenon can be summarized into just one:the pressure of finding a job arter graduation. With the admission expansion of colleges, a lot more graduates have to copete for the limited job posts. How to make oneslf more competitive? Maybe more certificates at hand. Hoping that the employers might find one of them more attractive,the students are compelled to run from one exam to another.As far as I am concerned, the students should have a more rational attitude toward certificates, because exam certificates do not neceesarily represent one"s ability.For me one should work hard at his or her major.Opportunity will come to you if you are competeht enough in your field. Nowadays there is a "certificate craze" on campus . Thousands of college students are keen on working for various certificate, such as CET Band 4 and Band 6 certificates, Business English Certificate, and other different professional certificates.翻译:当今校园出现一股考证热,成千上万的大学同学热衷于各种各样的证书,比如英语四六级证书,商务英语证书,以及其他不同的专业证书。But why is there such a craze ? First , it has much to do with the fierce competitive workforce market. It is widely believed that the more certificates a college student has on graduation, the better chance he has for a decent job. Second, many students just want to prove themselves by working for a certificate.They have been interested in a certain field and have worked hard on it, so they want a certificate to justify their efforts.翻译:为何出现这样的狂热?首先,在市场竞争激烈的劳动力市场有许多工作要做,。人们普遍认为,一个持有更多认证的大学毕业生,他有机会得到一个像样的工作。第二,许多学生只是想通过认证来提高自己。他们一直感兴趣的某个特定领域并且努力的学习,所以他们想要一个证书来证明他们的努力成果。I think the certificate craze is good for both the society and students. When students combine their work for some certificates with their academic efforts,their college life will be more fruitful than otherwise.翻译:我觉得对于认证的狂热是有利于社会和学生的。当学生结合他们取得的认证和学术知识,他们的大学生活将是更加丰富。
2023-07-19 21:27:421

direction可以变成direct吗?

您好亲!Direction和direct是两个完全不同的单词,不能交换使用。虽然它们的拼写相近,但是它们的含义和词性不同。Direction是一个名词,表示方向、指引、用法等概念。而direct则可以是一个形容词或者一个动词。作为形容词,它的含义是直接的、直系的,作为动词,它的含义是指导、引导、管理等。 我们来举几个例子理解这两个单词的区别: Please give me directions to your house. (请告诉我去你家的路线。) He directly told me what to do. (他直接告诉我该做什么。) She"s the director of the company. (她是这家公司的董事长。) 在这里,我们可以看到,direction和direct的用法是不同的。在第一个例句中,我们只能使用direction,因为我们需要询问路线,并不需要指导或管理什么;在第二个例句中,我们使用了direct作为动词,因为它的意义是指导和引导所需要的;而在第三个例句中,我们使用了director,因为它是 direction 的派生词,表示管理层的职位。希望这样的解释有助于你理解这两个单词的差异。谢谢!
2023-07-19 21:27:491

Directions: There is a passage in this section. The passage is followed by some st

原文尝试补充为: You are required to select the correct words to fill in the blanks.整段话的翻译为: A部分的指导,在这个部分,将有一个消息有十个空,你需要选择合适的词语填空。这里应该就是英语考试常见综合能力考查题型的完形填空,需要注意时态,语态,语法,语境以及相关的固定搭配和猜测词义等。
2023-07-19 21:27:571

Good Directions 歌词

歌曲名:Good Directions歌手:Billy Currington专辑:Doin" Somethin" RightBilly Currington - Good DirectionsBy:LikealanI was sittin" there sellin" turnips on a flatbed truckCrunchin" on a pork rind when she pulled upShe had to be thinkin" "This is where Rednecks come from"She had Hollywood written on her license plateShe was lost and lookin" for the interstateNeedin" directions and I was the man for the jobI told her way up yonder past the caution lightThere"s a little country store with an old Coke signYou gotta stop in and ask Miss Bell for some of her sweet teaThen a left will take you to the interstateBut a right will bring you right back here to meI was sittin" there thinkin" "bout her pretty faceKickin" myself for not catchin" her nameI threw my hat and thought, "You fool, that could"ve been love"I knew my old Ford couldn"t run her downShe probably didn"t like me anyhowSo I watched her disappear in a cloud of dust.I told her way up yonder past the caution lightThere"s a little country store with an old Coke signYou gotta stop in and ask Miss Bell for some of her sweet teaThen a left will take you to the interstateBut a right will bring you right back here to meIs this Georgia heat playin" tricks on meOr am I really seein" what I think I seeThe woman of my dreams comin" back to meShe went way up yonder past the caution lightDon"t know why, but somethin" felt rightWhen she stopped in and asked Miss Bell for some of her sweet teaMama gave her a big "ol glass and sent her right back here to meThank God for good directions:and turnip greensBilly Currington - Good DirectionsDoin Somethin Righthttp://music.baidu.com/song/5479471
2023-07-19 21:28:031

a sense of directions还是direction?

表示方向感用a sense of direction希望对你有帮助
2023-07-19 21:28:132

武汉科技大学认可度高吗

武汉科技大学认可度较高。资料扩展:武汉科技大学简称“武科大”,坐落于湖北省武汉市,是湖北省人民政府、教育部和六家国家特大型企业共建高校,是湖北国内“双一流”一流大学建设高校 ,入选国家“中西部高校基础能力建设工程”、“111计划”、首批高等学校科技成果转化和技术转移基地、国家创新人才培养示范基地、全国深化创新创业教育改革示范高校。学校历史可溯源至1898年成立的湖北工艺学堂 ;1958年组建为武汉钢铁学院,开办本科教育;1995年,隶属于原国家冶金工业部的武汉钢铁学院、武汉建筑高等专科学校、武汉冶金医学高等专科学校合并组建为武汉冶金科技大学。1998年,学校实行“中央与地方共建,以湖北省人民政府管理为主”的管理体制;1999年,更名为武汉科技大学。2013年,学校由湖北省人民政府、教育部和宝钢集团有限公司、鞍山钢铁集团公司、武汉钢铁(集团)公司、首钢总公司、中国冶金科工集团有限公司、中国中钢集团公司共建。
2023-07-19 21:24:531

为什么iPhone4 连接不上电脑?

在网上下载一个客户端就行
2023-07-19 21:24:544

国内购物中心有哪些?

万达,家乐福,大润发
2023-07-19 21:24:5610

魔方有哪几种颜色,什么颜色对应什么颜色

按国际标准配色,有红橙绿蓝白黄六种。红对橙,蓝对绿,白对黄
2023-07-19 21:24:577

求达人帮忙翻译下,急~~

额,机翻的?厉害。。
2023-07-19 21:24:571

OrCAD中Instance和Occurrence属性的区别

器件的Instance就是指从原始库摆放到设计页面时的固有属性。每摆放一个器件,即有Instance和Occurrence两种属性。如果用户不特别去更改Occurrence属性的值,那么,每更改一次instance属性值,这个值就会传递给所有的Occurrence,但一旦Occurrence属性被用户更改过,这种传递效应便失效了。用户在产生网表的时候,网表里器件的属性是来自Occurrence。Occurrence属性在设计层次式原理图时显得很重要,比如同一个子电路被三个不同的父电路调用,而在各个父电路里,子电路器件的值是不一样的,那么,这个器件就有一个Instance属性和三个Occurrence属性,Occurrence属性的值就是对应到三个不同父电路里的相应值。
2023-07-19 21:25:052

TI-NSPIRE的基本性能

TI-Nspire clickpad 及TI-Nspire CAS clickpad 是德州仪器于2007年9月所推出的图形计算器,两部计算器都有 64MB 内存,其中32MB是计算内存,可供用户直接使用。另外32MB是 Flash Memory。它们拥有强大的计算功能,包括矩阵、微积分等,以及程序及图像功能,而且这些功能有很多是其他图形计算机没有的,例如矩阵计算包括 Eigenvalue、Eigenvector、 LU Decomposition 这些其他计算器没有的功能。它们也有 Flash Memory 功能,这项强劲功能可容许 TI-Nspire clickpad/ TI-Nspire CAS clickpad通过连接线用TI Nspire Computer Link接受一些由网上下载的程序并变为TI-Nspire / TI-Nspire CAS 的内置功能(通过MyLib)。TI-Nspire CAS 另外还有解方程及微分方程 ( Differential Equations )、极限 ( Limits )、泰勒展开式 ( Taylors Expansion ) 等功能,在3.X系统增加了3D函数功能。它也和 TI-89 Titanium 一样有符号代数 ( Symbolic Algebra 或CAS,Computer Algebra System) 功能。TI-Nspire clickpad/ TI-Nspire CAS clickpad的键盘设计颇为特别,那些英文字母和其他特殊符号按键是很小的绿色及灰色按键,这种可能造成经常会误按,不过,大家只要熟悉了就会习惯及不会失误操作。TI-Nspire 另外有一个 TI-84 Plus Silver Edition 兼容键盘,如果将此键盘装上,那么 TI-Nspire 就会以 TI-84 Plus Silver Edition 的模式运作,这个设计相信是为了迁就以前一直使用 TI-83 Plus 及 TI-84 Plus 的人,让他们较容易适应新机。TI-Nspire CAS 就没有这个兼容键盘,也不能以 TI-84 Plus 的模式运作,应该是因为这个键盘的额外成本,放弃了兼容性及键盘提供。TI-Nspire 及 TI-Nspire CAS 的售价相差很小,纯以功能而言,TI-Nspire CAS clickpad比TI-Nspire clickpad是好得多的,就像 TI-89 Titanium 和 TI-84 Plus 的关系一样。TI-89 Titanium 及 TI-84 Plus / TI-84 Plus Silver Edition 仍然继续售卖,没有迹象显示德州仪器会停产它们。 代数功能TI-Nspire CAS涵盖了已有计算器的所有功能,主要包括:运算功能 - 数值求解;符号运算;二进制、十六进制运算;逻辑运算;三角函数;双曲函数;最小公倍数;最大公约数;因式分解;多项式展开。微积分 - 求导数、积分、极限、函数最大值、最小值、切线、解微分方程、对隐函数求微分。矩阵 - 矩阵运算,包括特征值、特征量的计算、LU Decomposition、QR 因数分解、包含符号元素的矩阵。作图功能函数作图、参数作图、极坐标作图、三维作图、微分方程作图、数据统计作图、图形变换、圆锥曲线作图、不等式作图、函数值列表等。几何功能创建和研究几何形状、模拟点在图形上的运动并研究其性质、研究几何的变换,有利于平面几何的学习。可以实现函数作图形式、参数方程作图形式与数据统计作图形式并存在同一个坐标系下, 有利于平面解析几何的学习。统计分析功能对一元或二元变量进行统计、对函数进行回归与拟合操作、进行多种假设检验(T-test, Z-test, ANOVA等)、计算并绘制多种分布的图形(散点图、x-y线图、直方图、箱形图、回归线、正态概率图、假设检验图)、排列组合、随机数、推论统计等。金融计算功能包括货币的时间价值(TVM),不均匀现金流,分期付款、利率转换等。编程功能简单易学的编程语言,用户可根据自己的需求来编写不同有应用程序。 TI-nspire 的CAS版本拥有计算机代数系统。计算机代数系统的标志是能够以字符串作为运算单位。不同的字符串代表的含义是不同的,字符串可以被赋值使它具有特殊含义。例如:a 作为一个字符串b 作为另一个字符串则有2a 代表 2 乘以 a ,2个a的和。a*b 代表 a 和 b 相乘。ab 则代表另一个与 a 或 b 都不相关的字符串。此时,给 a 赋值:2→a(令 a 等于 2)则有2a = 2*2 = 4a*b = 2*bab 仍然是另一个独立的字符串。ab * ab = 2*ab(a*b)*(a*b) = a^2 * b^2 = 2^2 * b^2 = 4* b^2 TI-Nspire系列图形计算器可以与威尼尔EasyLink USB接口无缝工作,从而令数据采集变得更加有趣、快速和准确;同时对用户而言也变得更加直观。EasyLink可以将超过50种的威尼尔标准传感器与任意型号的TI-Nspire图形计算器USB端口逐一相连。一旦连接上了传感器,学生可以立即开始快速轻松的采集,并进行来源更为广泛的数据分析,诸如pH值,光强以及压力等等。TI-Nspire系列图形计算器会自动识别与EasyLink连接的传感器并启动威尼尔数据探索应用程序开始数据采集。对于那些一次只要使用一种传感器的实验,在TI-Nspire图形计算器或者电脑软件上,学生及教师只需要接上传感器,单击“开始”/”Start”,然后就可以开始采集数据。就是那么简单!一旦采集到了数据,学生可以使用集成了的威尼尔数据探索应用程序去判断数据是线性的或非线性的。开始采集数据之前,学生可以使用”Draw Prediction(绘制预测)”功能,直接在数据将显示的图像区域内画下他们的预测,然后在采集完成后检验他们的假设。体验使用传感器来探究自然前所未有的方便。TI-Nspire实验托板结合TI-Nspire威尼尔DataQuest?应用程序和可供超过50个数据采集传感器的选择,将科学科目的教学和学习带到一个把科学概念直观化,引领学生多参与的教学新境界。TI-Nspire多个传感器数据采集与TI-Nspire实验托板使用一次传感器或同时使用多个传感器进行多种的实验。TI完整的数据采集方案有助于教师和学生最有效率地利用课堂时间,让学生从富有活力、别开生面的课堂探究及讨论中学习科学知识。TI-Nspire实验托板带有5个传感器接口,包括3个模拟信号接口以及2个数字信号接口。允许学生同时使用包括高采样率的5个传感器,小巧方便。也让野外教学的课堂实验更有效率、便捷。 CPU:150 MHz ARM(由于TI限制了CPU频率,因此在OS2.1前都并未达到150MHz的频率)储存器:16 MB RAM, 20 MB Flash ROM屏幕规格:240x320 3.5英寸 16级灰阶 约为115DPI使用USB Mini接口与电脑连接使用4节AAA 7号电池或TI锂离子充电电池 CX/CX CAS:  CPU:132 MHz ARM  储存器:64MB RAM, 128MB Flash ROM  屏幕规格:320*240,3.2英寸,6.5K色,125ppi  电池只能使用充电电池。  CM/CM-C CAS:  储存器:32MB RAM, 128MB Flash ROM  不支持Dock  其它同CX。
2023-07-19 21:25:061

life is like an onion, you peel it off one layer after another, and sometimes you weep

生活就像洋葱, 你一片一片地剥开, 总有一片会让你流泪。
2023-07-19 21:25:084

java关于instance的定义

对象 instance 类而不应该是 类 instance 对象
2023-07-19 21:24:493

德州仪器的新出的TI-Nspire? CX和TI-Nspire? CX CAS区别?他们有囊括TI-84+的功能吗

TI-Nspire 及TI-Nspire CAS是Texas Instruments 于2007年9月所推出的新型图形计算器,两部计算器都有64MB庞大记忆体,其中32MB是计算记忆,可供用家直接使用,另外32MB是Flash Memory。它们拥有强大的计算功能,包括矩阵、微积分 Calculus 等,以及程式及图像功能,而且这些功能有很多是其他图形计算机没有的,例如矩阵计算包括 Eigenvalue、Eigenvector、 LU Decomposition 这些其他计算器没有的功能。它们也有 Flash Memory 功能,这项强劲功能可容许TI-Nspire / TI-Nspire CAS 透过TI Graph Link 连接线接受一些由网上下载的程式并变为 TI-Nspire / TI-Nspire CAS 的内置功能,在现今的计算器中可是数一数二了。TI-Nspire CAS 另外还有解方程及微分方程 ( Differential Equations )、极限 ( Limits )、泰勒展开式 ( Taylor"s Expansion ) 等功能,不过 TI-89 Titanium 所有的三维图像功能目前就欠缺。它也和TI-89 Titanium 一样有符号代数 ( Symbolic Algebra ) 功能。TI-Nspire 及 TI-Nspire CAS 的售价相差很小,纯以功能而言,TI-Nspire CAS 比 TI-Nspire 是好得多的,就像TI-89 Titanium 和TI-84 Plus 的关系一样。这两款肯定比84的功能强大许多,相差了几个等级,而且84所有的功能这两款机器都有
2023-07-19 21:24:481

usb hard drive是什么

USB hard driver.其实就是指的优盘。这个就是USB硬盘驱动器。优盘是这个说法的简写。
2023-07-19 21:24:461

魔方 是什么?

楼主要养成自己搜索的习惯,很多东西百度百科都有详细的介绍。http://baike.baidu.com/view/35837.htm
2023-07-19 21:24:422

在java中instance的用法

是instanceof还是instance?instanceof是Java的一个二元操作符,和==,>,<是同一类东东。由于它是由字母组成的,所以也是Java的保留关键字。它的作用是测试它左边的对象是否是它右边的类的实例,返回boolean类型的数据。举个例子:  Strings="IAManObject!";  booleanisObject=sinstanceofObject;  我们声明了一个String对象引用,指向一个String对象,然后用instancof来测试它所指向的对象是否是Object类的一个实例,显然,这是真的,所以返回true,也就是isObject的值为True。  instanceof有一些用处。比如我们写了一个处理账单的系统,其中有这样三个类:  publicclassBill{//省略细节}  publicclassPhoneBillextendsBill{//省略细节}  publicclassGasBillextendsBill{//省略细节}  在处理程序里有一个方法,接受一个Bill类型的对象,计算金额。假设两种账单计算方法不同,而传入的Bill对象可能是两种中的任何一种,所以要用instanceof来判断:  publicdoublecalculate(Billbill){  if(billinstanceofPhoneBill){  //计算电话账单  }  if(billinstanceofGasBill){  //计算燃气账单  }  ...  }  这样就可以用一个方法处理两种子类。  然而,这种做法通常被认为是没有好好利用面向对象中的多态性。其实上面的功能要求用方法重载完全可以实现,这是面向对象变成应有的做法,避免回到结构化编程模式。只要提供两个名字和返回值都相同,接受参数类型不同的方法就可以了:  publicdoublecalculate(PhoneBillbill){  //计算电话账单  }  publicdoublecalculate(GasBillbill){  //计算燃气账单  }  所以,使用instanceof在绝大多数情况下并不是推荐的做法,应当好好利用多态。instance的话,不知道,一般我们定义获取实例的时候写个getInstance的方法//
2023-07-19 21:24:393

load usb driver with usbasp.sys什么意思

用usbasp.sys文件装载USB驱动器。
2023-07-19 21:24:392

请问如何翻译:生活就像一个洋葱,你只能一层一层地把它拨开,有时你还得流泪.

Quote by Carl Sandburg(引用卡尔·桑德堡 -- 美国诗人、传记作家): Life is like an onion; you peel it off one layer at a time,and sometimes you weep.
2023-07-19 21:24:391

matlab中PCA的人脸识别,最后得出的识别率是什么意思啊!

%一个修改后的PCA进行人脸识别的Matlab代码% calc xmean,sigma and its eigen decompositionallsamples=[];%所有训练图像for i=1:40for j=1:5a=imread(strcat("D: awdataORLs",num2str(i),"",num2str(j),".pgm"));% imshow(a);b=a(1:112*92); % b是行矢量 1×N,其中N=10304,提取顺序是先列后行,即从上到下,从左到右b=double(b);allsamples=[allsamples; b]; % allsamples 是一个M * N 矩阵,allsamples 中每一行数据代表一张图片,其中M=200endendsamplemean=mean(allsamples); % 平均图片,1 × Nfor i=1:200 xmean(i,:)=allsamples(i,:)-samplemean; % xmean是一个M × N矩阵,xmean每一行保存的数据是“每个图片数据-平均图片”end;sigma=xmean*xmean"; % M * M 阶矩阵[v d]=eig(sigma);d1=diag(d);[d2 index]=sort(d1); %以升序排序cols=size(v,2);% 特征向量矩阵的列数for i=1:colsvsort(:,i) = v(:,index(cols-i+1) ); % vsort 是一个M*col(注:col一般等于M)阶矩阵,保存的是按降序排列的特征向量,每一列构成一个特征向量dsort(i) = d1( index(cols-i+1) ); % dsort 保存的是按降序排列的特征值,是一维行向量end %完成降序排列%以下选择90%的能量dsum = sum(dsort);dsum_extract = 0;p = 0;while( dsum_extract/dsum < 0.9)p = p + 1;dsum_extract = sum(dsort(1:p));endi=1;% (训练阶段)计算特征脸形成的坐标系while (i0)base(:,i) = dsort(i)^(-1/2) * xmean" * vsort(:,i); % base是N×p阶矩阵,除以dsort(i)^(1/2)是对人脸图像的标准化,详见《基于PCA的人脸识别算法研究》p31i = i + 1;end% add by wolfsky 就是下面两行代码,将训练样本对坐标系上进行投影,得到一个 M*p 阶矩阵allcoorallcoor = allsamples * base;accu = 0;% for i=1:40for j=6:10 %读入40 x 5 副测试图像a=imread(strcat("D: awdataORLs",num2str(i),"",num2str(j),".pgm"));b=a(1:10304);b=double(b);tcoor= b * base; %计算坐标,是1×p阶矩阵for k=1:200 mdist(k)=norm(tcoor-allcoor(k,:));end;%三阶近邻 [dist,index2]=sort(mdist);class1=floor( index2(1)/5 )+1;class2=floor(index2(2)/5)+1;class3=floor(index2(3)/5)+1;if class1~=class2 && class2~=class3class=class1;elseif class1==class2class=class1;elseif class2==class3class=class2;end;if class==iaccu=accu+1;end;end;end;accuracy=accu/200 %输出识别率函数调用是定义函数,然后用函数名进行调用就可以了
2023-07-19 21:24:383