浙大远程教育 2017 可视化计算离线作业
可视化计算离线作业
浙江大学远程教育学院《可视化计算》课程作业2015年（冬）姓名：袁磊 学 号： 715003012008 年级： 15秋计算机 学习中心： 宁波————————————————————————————— 注意：所有图像的标题必须呈现足够你本人信息1.（10分）求解下列线性方程组的解：1620908356215.87320332231074445.06.337925.1=-++=++++=++-+-=--+=++++z y v u z y x v u z y x v u z y x v z y x v u2.（10分）信号y = 5*sin(pi*20*t)+3*cos(2*pi*50*t)幅度为1的白噪声的干扰，请画出此信号，然后进行傅立叶变换，画出变换后的频域信号。
cleart=0:0.001:0.6;y=5*sin(pi*20*t)+3*cos(2*pi*50*t);y=y+randn(1,length(t));subplot(2,2,1);plot(y(1:100));title('袁磊的傅立叶变换频域信号输出图象')xlabel('变换前的信号');Y=fft(y,256); subplot(2,2,2);Y=real(Y); plot(Y(1:256));xlabel('变换后频域信号')Pyy=Y.*conj(Y)/256;f=1000*(0:255)/256;subplot(2,2,3);plot(Pyy(1:256));xlabel('信号功率密度');3.（10分）在空间有一个带正电的点电荷，请画出此点电荷的空间电位分布与电场强度的空间分布图。
fprintf('请输入电位分布方程V（x, y)\n');>>请输入电位分布方程V（x, y)V= input(':', 's');:log(x.^2 + y.^2)NGrid = 20;xMax = 5;yMax = 5;xPlot = linspace(-xMax, xMax, NGrid);[x, y] = meshgrid(xPlot);VPlot = eval(V);[ExPlot, EyPlot] = gradient(-VPlot);clf;subplot(1, 2, 1), meshc(VPlot);set(gcf, 'color', 'w')xlabel('x');ylabel('y');zlabel('电位');subplot(1, 2, 2), axis([-xMax xMax -yMax yMax]);cs =contour(x, y, VPlot);clabel(cs); hold on;quiver(x, y,ExPlot, EyPlot);xlabel('x'); ylabel('y'); hold off;title('电位分布与电位强度线图袁磊制作')4.（10分）仿照课本第11章的太阳｜地球｜月亮｜卫星，绕转动画实例，呈现地球绕太阳运转的动画。
浙大数据结构与算法离线作业
浙大数据结构与算法离线作业————————————————————————————————作者：————————————————————————————————日期:ﻩ浙江大学远程教育学院《数据结构与算法》课程离线作业姓名:学号:年级：2016春学习中心：—————————————————————————————一、填空题：(【序号,章，节】。
）【１，１,2】线性结构中元素之间存在一对一关系，树形结构中元素之间存在一对多关系,图形结构中元素之间存在多对多关系。
【2，１，2】为了最快地存取数据元素，物理结构宜采用顺序存储结构。
【３，1，2】存储结构可根据数据元素在机器中的位置是否一定连续分为顺序存储结构 , 链式存储结构。
【4，１，3】度量算法效率可通过时间复杂度来进行。
【5,1,３】设n 为正整数,下面程序段中前置以记号@的语句的频度是ｎ(n＋１)/2 。
fｏｒ(i=０; i<n; i++)｛for (j=0; j＜n; j+＋）ｉｆ (i+j＝=ｎ－１)@ a[i]［ｊ]=０;｝【6,１,3】设ｎ为正整数,试确定下列各程序段中前置以记号@的语句的频度:（1) i=1； k=0;whｉｌｅ（i<=n－1){i++；@ k＋=１0 ＊ i； // 语句的频度是n-1。
}(２） k=0;for (i＝1; i<＝n; i++）{for (j=i; ｊ<=n; j＋+)@ k+＋; // 语句的频度是n(n+1)/2。
}【7,３,2】线性表（a1,a２，…，a n)有两种存储结构: 顺序存储结构和链式存储结构，请就这两种存储结构完成下列填充:顺序存储密度较大；顺序存储利用率较高;顺序可以随机存取；链式不可以随机存取；链式插入和删除操作比较方便。
【8,3,２】从一个长度为n的顺序表中删除第ｉ个元素(1≤i≤n)时，需向前移动n－ｉ个元素。
【９,3,2】带头结点的单链表Heaｄ为空的条件是Head-＞nexｔ=NUＬＬ。
工程数学离线作业
浙江大学远程教育学院《工程数学》课程作业姓名：学 号： 年级： 学习中心：————————————————————————————— 教材：《复变函数与积分变换》第一章1.1计算下列各式：（2）（a-b i ）3解：（a-bi ）３=a ３b ２bi+3a(bi)２-(bi)３=a ３-3ab ２+i （b ３-3a ２-b ）； （3）i (i 1)(i 2)-- 1.2证明下列关于共轭复数的运算性质：（1）1212()z z z z ±=±（2）1212()z z z z =（3）11222()(0)zz z z z =≠ 1.4将直线方程ax+by+c=0(a 2+b 2≠0)写成复数形式.[提示：记x+i y=z.]1.5将圆周a(x 2+y 2)+bx+cy+d =0(a ≠0)写成复数形式(即用z 与z 来表示，其中z=x+iy ).1.6求下列复数的模与辐角主值：（1i1.8将下列各复数写成三角表示式：（2）sin a +I cos a1.10解方程：z 3+1=0.1.11指出下列不等式所确定的区域与闭区域，并指明它是有界的还是无界的？是单连通区域还是多连通区域？（1）2<|z|<3（3）4π<arg z <3π；且1<|z|<3（5）Re z 2<1（7）|arg z |<3π第二章2.2下列函数在何处可导？何处不可导？何处解析？何处不解析？（1）f(z)=z z 2（2）f(z)=x 2+iy 22.3确定下列函数的解析区域和奇点，并求出导数：（1）211z - 2.9由下列条件求解析函数f(z)=u+i v .（1）u(x-y)(x 2+4xy+y 2)（3）u=2(x-1)y, f (0)=-i（4）u=e x (x cos y - y sin y),f (0)=02.13试解方程：（1）e zi（4）sin z +cos z =02.14求下列各式的值：（1）cos i（3）(1-i)1+i第三章3.1计算积分120[()]d i x y ix z +-+⎰.积分路径为（1）自原点至1+i 的直线段；（2）自原点沿实轴至1，再由1铅直向上至1+i ；（3）自原点沿虚轴至i ，再由i 沿水平方向向右至1+i.3.2计算积分d ||cz z z ⎰的值，其中C 为（1）|z|=2；（2）|z|=4. 3.6计算21d c z z z-⎰ ，其中为圆周|z|=2 3.8计算下列积分值：（1）0sin xi⎰z d z（3）0(32)d i z e z z +⎰3.10计算下列积分：（1）|2|1d 2zz e z z -=-⎰ （2）2||221d 1z z z z z =-+-⎰ （4）||d (1)(1)nz r z r z =≠-⎰ 3.11计算I=d (21)(2)cz z z z +-⎰，其中C 是（1）|z |=1；（2）|z -2|=1；（3）|z -1|=12；（4）|z |=3.3.13计算下列积分：（2）||22sin d ()2z z z z π=-⎰（3）123cos d C C C z z z -=+⎰，其中C 1：|z |=2，C 2：|z |=3.第四章4.2下列级数是否收敛？是否绝对收敛？（1）11i ()2n n n∞=+∑ （2）1i !n n n ∞=∑4.4试确定下列幂级数的收敛半径：（1）11n n nz ∞-=∑（2）211(1)n n n z n ∞=+∑4.5将下列各函数展开为z 的幂级数，并指出其收敛区域：（1）311z + （3）221(1)z + （5）sin 2 z4.7求下列函数在指定点z 0处的泰勒展式：（1）21z ，z 0=1 （2）sin z ，z 0=14.8将下列各函数在指定圆环内展开为洛朗级数：（1）21(1)z z z +- ，0<|z |<1,1<|z |<+∞ （3）2225(2)(1)z z z z -+-+ ，1<|z |<2 （4）cosi 1z- ，0<|z -1|<+∞ 4.9将f(z)=2132z z -+ 在z =1处展开为洛朗级数.第五章5.3下列各函数有哪些奇点？各属何类型（如是极点，指出它的阶数）：（1）221(4)z z z -+ ；（2）3sin z z ；（3）1sin cos z z + ； （4）21(1)z z e - ；（5）ln(1)z z + ；（6）111z e z -- . 5.5如果f(z)与g(z)是以z 0为零点的两个不恒为零的解析函数，则00()()lim lim ()()z z z z f z f z g z g z →→'=' （或两端均为∞）. [提示：将()()f z g z 写成0()()()m n z z z z ϕψ--的形式，再讨论.] 5.7求出下列函数在孤立奇点处的留数：（1）1z e z- （2）722(2)(1)z z z -+ （5）1sin z z（6）sh ch z z 5.8利用留数计算下列积分：（1）||1d sin z z z z =⎰ （2）32||2d (1)(3)z z e z z z =-+⎰ （4）1||2sin d (1)z z z z z e =-⎰ 5.12求下列各积分之值：（1）20d (1)cos x a a θθ>+⎰ （3）2222d (0)()x x a x a +∞-∞>+⎰ （4）2cos d 45x x x x +∞-∞++⎰第八章 8.4求下列函数的傅氏变换：（1）1,()1,0,f t -⎧⎪=⎨⎪⎩ 10,01,t t -<<<< （2）,()0,t e f t ⎧=⎨⎩ 0,0;t t ≤> （3）21,(t)0,t f ⎧-=⎨⎩ ||1,||1;t t ≤> 8.5求下列函数的傅氏变换，并证明所列的积分等式.（2）sin ,()0,t f t ⎧=⎨⎩ ||,||.t t ππ≤> 证明 20sin ,sin sin d 210,t t πωπωωω+∞⎧⎪=⎨-⎪⎩⎰||,||.t t ππ≤> 8.13证明下列各式：其他(1) f 1(t )* f 2(t )= f 2(t )* f 1(t )8.14设10,()1,f t ⎧=⎨⎩ 0,0;t t ≤> 20,()e ,t f t -⎧=⎨⎩ 0,0,t t <≥ 求f 1(t )* f 2(t ).8.15设1()F ω= F [f 1(t)], 2()F ω= F [f 2(t)]，证明：F [f 1(t)·f 2(t)]=121()*()2F F ωωπ.第九章9.1求下列函数的拉氏变换：（1）3,()1,0,f t ⎧⎪=-⎨⎪⎩02,24,4;t t t ≤<≤<> （2）3,()cos ,f t t ⎧⎪=⎨⎪⎩ 0,2;2t t ππ≤<≥ 9.2求下列函数的拉氏变换：（1）sin 2t（4）||t9.3求下列函数的拉氏变换：（1）232t t ++（3）2(1)t t e -（5）cos t at9.4利用拉氏变换的性质，计算L [f (t )]：（1）3()sin 2t f t te t -= ；（2）30()sin 2d t t f t t e t t -=⎰9.5利用拉氏变换的性质，计算L -1[F (s )]（2）1()ln1s F s s +=- （4）221()(1)F s s =- 9.6利用像函数的积分性质，计算L [f (t )]：（1）sin ()kt f t t = （2）30sin 2d t t e t t t-⎰ 9.8求下列像函数F （s ）的拉氏变换：（5）42154s s ++ （7）221s e s-+ 9.11利用卷积定理证明下列等式：（1）L [0()d t f t t ⎰ ]= L [()*()f t u t ]=()F s s ; （2）L -1222sin (0).()2s t at a s a a⎡⎤=≠⎢⎥+⎣⎦教材：《常微分方程》第一章2.验证函数1y cx c =+ （c 是常数）和y =±都是方程1y xy y '=+ 的解.4.验证函数12cos sin y c kx c kx =+ （k,c 1, c 2是常数）是方程20y k y '''+=的解.0.x y +=8.2(1)tan ,(0) 2.y y x y '=-=求下列齐次方程的解： 9.22d 2.d y xy x x y=+ 10.d (1ln ln ).d y y y x x x =+-12.d ,(1) 4.d y y y x x==13.1(1).2xy y y '-==求下列一阶线性方程或伯努利方程的解： 14.2d d y y x x x=- 15.2d 2,(0)2d x y xy x e y x -++== 17.2d 0,(0)1d 2(1)2y xy x y x x y--==- 验证下列方程为全微分方程或找出积分因子，然后求其解： 19.453(5d d )d 0x y x x y x x ++=20.2(d d )d 5d 0,(0)1x x x y x x y y y ++-==第二章求下列方程的通解或特解： 7.40y y '''-=8.20y y ''+=9.20y y y '''-+=10. 4130y y y '''++=11. 00540,|5,|8x x y y y y y ==''''-+=== 求下列方程的通解或特解： 18.y y a ''+= （a 是常数），y （0）=0,y ’（0）=0 19.5420,(0)0,(0)2x y y y e y y ''''++===- 24.22x y y y e -'''++= 26.2002d d cos 2,||2d d t t x x x t x t t==+===- 27.22d sin ,0d x x at a t+=> 28.22d d 32sin cos d d y y x x x x+=+ 31.225cos y y x '''+=33.22cos x y y y e x -'''-+= 34.4sin 2y y x x ''+=答案见教材“习题答案”。
浙大远程面向对象程序设计离线作业答案
浙江大学远程教育学院《面向对象程序设计》课程作业姓名：董建良学号：7年级：2015年秋学习中心：杭州学习中心—————————————————————————————第2章【2.3】测试下面的注释(它在C++风格的单行注释中套入了类似于C的注释)是否有效。
//this is a strange /*way to do a comment*/答：此注释有效，单行注释中可以嵌套 / *……* /方式的注释。
【2.4】以下这个简短的C++程序不可能编译通过，为什么？#include<iostream>using namespace std;int main(){int a,b,c;cout<<"Enter two numbers:";cin>>a>>b;c=sum(a,b);cout<<"sum is:"<<c;return 0;}sum(int a,int b){ return a+b;}答：不可能通过编译，sum的使用在其声明之前是非法的，应增加一行sum(int a,int b); 放在using namespace std;之后。
【2.5】回答问题。
(1) 以下两个函数原型是否等价：float fun(int a,float b,char *c);float fun(int,float,char * );(2) 以下两个函数的第一行是否等价：float fun(int a,float b,char * c);float fun(int,float,char * );答：（1）两个函数原型等价，因为函数原型中的参数名可以缺省。
（2）两个函数的第一行不等价，因为函数的第一行必须包括参数名。
【2.6】下列语句中错误的是( D )。
A．int *p=new int(10)；B．int *p=new int[10]；C．int *p=new int；D．int *p=new int[40](0)；【2.7】假设已经有定义“const char * const name="chen";”下面的语句中正确的是( D )。
浙大远程-计算机网络基础第1、2章离线作业和答案
第1章概述作业一一．填空题：1.从资源共享的角度来定义计算机网络，计算机网络指的是利用_通信线路__将不同地理位置的多个独立的__自治计算机系统_连接起来以实现资源共享的系统。
2.从传输范围的角度来划分计算机网络，计算机网络可以分为_局域网_、城域网_和_广域网_。
其中，Internet属于_广域网__。
3.在TCP/IP的应用层协议使用的是_客户服务器方式_，在这里，客户是服务请求方，服务器是服务提供方。
美国的IBM公司在1974年宣布了它研制的网络体系结构_ SNA __。
4.通信线路的_带宽__是指通信线路上允许通过的信号频带范围(或通频带) ，单位是HZ。
但在计算机网络中，它又用来表示网络的通信线路所能传送数据的能力。
5.数据通信中的信道传输速率单位用b/s表示，b/s的含义是__每秒比特__。
6.目前，“带宽”常用作描述信道传送数据能力的物理量，其单位是b/s (bit/s),比之大的单位有：_ Kb/s ___、Mb/s、_ Gb/s __等。
7.将计算机网络划分为局域网LAN、城域网MAN、广域网WAN是按_网络的作用范围（或覆盖的范围）_划分的。
8.各节点都与中心节点连接，呈辐射状排列在中心节点周围，这种拓扑结构称为_星型拓扑结构_。
9.假设某用户通过电线部门的ADSL技术以2M（即2Mb/s）带宽接入Internet，在正常情况下其下载速度大约是_ 244KB(大写B表示字节)_。
10.在发送报文之前，先将较长的报文划分成为一个个更小的等长数据段，在每一个数据段前面，加上一些由必要的控制信息组成的首部(header)后，就构成了一个_分组_。
11.在计算机网络中，_各个子层_及其__各子层的协议_的集合称为网络体系结构。
12.开放系统互联，采用分层体系结构的模型称为__ OSI __参考模型。
13.在OSI参考模型中，在对等层次上传送的数据单位，都称为该层的_协议数据单元（PDU）_。
浙大远程操作系统原理离线作业
浙江大学远程教育学院《操作系统原理》课程作业姓名：学号：年级：学习中心：—————————————————————————————一、单选题7进程P0和P1的共享变量定义及其初值为boolean flag[2]；int turn=0；flag[0]=FALSE；flag[1]=FALSE；若进程P0和P1访问临界资源的类C代码实现如下：void P0() //P0进程{ while（TURE）{flag[0]=TRUE; turn = 1;while (flag[1] && turn == 1) ;临界区;flag[0] = FALSE;}}void P1() //P1进程{ while（TURE）{flag[1]=TRUE; turn = 0;while (flag[0] && turn == 0) ;临界区;flag[1] = FALSE;}}则并发执行进程P0和P1时产生的情况是：A．不能保证进程互斥进入临界区、会出现“饥饿”现象B．不能保证进程互斥进入临界区、不会出现“饥饿”现象C．能保证进程互斥进入临界区、会出现“饥饿”现象D．能保证进程互斥进入临界区、不会出现“饥饿”现象【答案】D2.有两个进程P1和P2描述如下:shared data：int counter = 6;P1 :Computing;counter=counter+1;P2 :Printing;counter=counter-2;两个进程并发执行，运行完成后，counter的值不可能为。
A. 4B. 5C. 6D. 7【答案】C3.某计算机采用二级页表的分页存储管理方式，按字节编址，页大小为210字节，页表项大小为2字节，逻辑地址结构为：页目录号页号页内偏移量逻辑地址空间大小为216页，则表示整个逻辑地址空间的页目录表中包含表项的个数至少是A．64 B．128 C．256 D．512【答案】B4.在动态分区系统中，有如下空闲块:空闲块块大小（KB）块的基址1 80 602 75 1503 55 2504 90 350此时,某进程P请求50KB内存,系统从第1个空闲块开始查找，结果把第4个空闲块分配给了P进程，请问是用哪一种分区分配算法实现这一方案?A.首次适应B. 最佳适应C. 最差适应D. 下次适应【答案】C5.在一页式存储管理系统中，页表内容如下所示。
2017浙大远程_刑法总论在线作业_刑法总论第1次.doc
2012春自己做的上传多次显示只能私有可是2011和2012的版本排列顺序不一样啊无奈只好改简单点您的本次作业分数为：100分单选题1.药店营业员李某与王某有仇。
某日王某之妻到药店买药为王某治病，D 犯罪预备2.甲、乙二人系某厂锅炉工。
一天，甲的朋友多次打电话催其赴约，但∙ D 应按照甲、乙所犯的罪分别处罚3.下列案例中哪一项成立犯罪未遂？∙ A 甲对胡某实施诈骗行为，被胡某识破骗局。
但胡某觉得甲穷困潦倒，实在可怜，就给其3000元钱，甲得款后离开现场4.甲、乙共谋杀害在博物馆工作的丙，两人潜入博物馆同时向丙各开一∙ B 甲、乙成立故意杀人罪的共犯5.药店营业员李某与王某有仇。
某日王某之妻到药店买药为王某治病，∙ D 犯罪预备6.下列哪一项属于我国刑法中规定的共同犯罪的主犯（）∙ C 胡二麻，某抢劫、抢夺集团的“军师”，集团的每次犯罪均由其组织策划，但其从未亲自参与7.吴某因憎恨自己所在学校的领导将自己开除，意欲夜晚潜入学校领导将其杀死，后来在情急之中误将张三当作校领导杀死，吴某该行为应属于（）∙ C 行为对象错误8.国家工作人员胡某贪污公款18万元，在罪行尚未被发觉前逃到朋友∙ A 属于一般自首，完全满足一般自首的成立条件9.林某因犯强奸罪被判有其徒刑10年，剥夺政治权利3年，有期徒刑D 1989年7月1日至2002年6月30日10.孙某纠集5人组成“天龙会”，该会宗旨为“盗富济贫”，并自封“大天C “天龙会”成员胡某的强奸犯罪11.韩国公民金某曾在印度、缅甸、泰国等国多次进行国际贩毒犯罪活C 可以对其进行刑事追诉，依据是对国际犯罪的普遍管辖权12.某医院妇产科护士甲值夜班时，一新生婴儿啼哭不止，甲为了止住C 疏忽大意的过失13.古某，女，因犯贩卖毒品罪被判处死刑，但死刑执行书因故迟迟未A 不能执行死刑，因刑法规定死刑不适用于已怀孕的妇女。
应立即停止执行并将情况上报。
14.某甲和某乙合谋盗窃一电器仓库，由某乙先配制一把"万能钥匙"，D 与某甲一起构成盗窃罪既遂15.某日，黄某牵着狗在山坡上闲逛，偶遇平日与己不和的刘某，黄某B 正当防卫16.王某14岁生日那天，邀集几个朋友到一饭馆吃饭。
2017浙大远程继续教育(高起专)基础英语在线作业17-24单元答案
2017浙江大学继续教育学习平台基础英语作业（第17~24单元）1.【第17单元】Millions of pounds’worth damage ______ by a storm which swept across the north of England last night.A has been causedB had been causedC will be causedD will have been caused正确答案:A单选题2.【第17单元】—Why did you leave that position?—I ______ a better position at IBM.A offerB offeredC am offeredD was offered正确答案:D单选题3.【第17单元】The new dictionaries are very useful.They ____ well and ____ already.A sell; have been sold outB sold; had sold outC sell, sell outD are sold; have been sold out正确答案:A单选题4.【第17单元】More than a dozen students in that school ______ abroad to study medicine last year.A sentB were sentC had sentD had been sent正确答案:B单选题5.【第17单元】—This cloth _____well and _____ long.—Ok. I'll take it. "A washes/lastsB is washed/lastedC washes/is lastedD is washing/lasting正确答案:A单选题6.【第17单元】—I saw Dave in lift this morning.—Really? He ______ around here for a long time.A won’t be seenB w asn’t seeC hasn’t been seenD hadn’t been seen正确答案:D单选题7.【第17单元】The policeman’s attention was suddenly caught by a small box which ______ placed under the Minister’s car.A has beenB was beingC had beenD would be正确答案:C单选题8.【第17单元】—The window is dirty.—I know. It ______ for weeks.A hasn’t cleanedB didn’t cleanC wasn’t cleanedD hasn’t been cleaned正确答案:D单选题9.【第17单元】The hero’s story ______ differently in the newspapers.A was reportedB was reportingC reportsD reported正确答案:A单选题10.【第17单元】The bridge which ______ last year looks really beautiful.A was builtB builtC was set upD had been built正确答案:A单选题11.【第18单元】It was not until 1920 _____ regular radio broadcasts began.A whichB whenC thatD since正确答案:C单选题12.【第18单元】It _____ Mike and Mary who helped the old man several days ago.A wasB areC wereD had been正确答案:A单选题13.【第18单元】—Honey, let’s go out for dinner.—______ I don’t have to cook.A Forgot it!B That’s gr eat!C Why?D Go ahead!正确答案:B单选题14.【第18单元】—Do you enjoy your present job?—_______. I just do it for a living.A Of courseB Not reallyC Not likelyD Not a little正确答案:B单选题15.【第18单元】It was the training _____ he had as a young man _____ made him such a good engineer.A what; thatB that; whatC that; whichD which; that正确答案:D单选题16.【第18单元】—Do you think you could do without help?—______. This is not the first time for me.A Take careB Hurry upC Not exactlyD Don’t worry正确答案:D单选题17.【第18单元】—Can I help you? Are you looking for anything in particular today?—_________We’re just looking.A Yes pleaseB No, thank youC Yes, you canD No, you needn’t正确答案:B单选题18.【第18单元】—Were all three people in the car injured in the accident? —No, ______ only the two passengers who got hurt.A there isB it wereC there wasD it was正确答案:D单选题19.【第18单元】She said she would go and she ________ go.A didn’tB didC reallyD would正确答案:B单选题20.【第18单元】—Everybody is going to climb the mountain . Can I go too , mom ? —______ Wait till you are old enough ,dear.A Will youB Why not?C I hope so.D I’m afraid not.正确答案:D单选题21.【第19单元】A library with five thousand books _____ to the nation as a gift.A is offeredB has offeredC are offeredD have offered正确答案:A单选题22.【第19单元】—Have you moved into the new house?—No yet, the rooms _____.A are being paintedB are paintingC are paintedD are being painting正确答案:A单选题23.【第19单元】—Do you know our town at all?—No, this is the first time I _____ here.A wasB have beenC cameD am coming正确答案:B单选题24.【第19单元】He would have paid ____ for the house if the salesgirl had insisted because he really wanted it.A twice as muchB much as twiceC as much twiceD twice much as正确答案:A单选题25.【第19单元】He ____ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside.A shouldB mustC wouldn’tD can’t正确答案:B单选题26.【第19单元】The police found that the house _____ and a lot of things ______.A has broken into; has been stolenB had broken into; had been stolenC has been broken into; stolenD had been broken into; stolen正确答案:D单选题27.【第19单元】I made a call to my parents yesterday. To my disappointment, _____ of them answered it.A eitherB noneC neitherD nobody正确答案:C单选题28.【第19单元】Is there any possibility of getting the price _____ further?A reducedB reduceC reducingD be reduced正确答案:A单选题29.【第19单元】Tom, you’re too lazy! The work _____ have been finished yesterday.A wouldB shouldC mustD could正确答案:B单选题30.【第19单元】______ at the bus stop, he found a lot of people waiting there.A ArrivedB ArrivingC Being arrivedD To arrive正确答案:B单选题31.【第20单元】It is reported that the police will soon look _____ the case of the two missing children.A uponB afterC intoD Out正确答案:C单选题32.【第20单元】The Internet has brought _____ big changes in the way we work.A aboutB outC backD Up正确答案:A单选题33.【第20单元】It was in 2005 ____ we began to introduce this new technique into our company.A whichB thenC whenD that正确答案:D单选题34.【第20单元】She brought with her three friends, none of ______ I had ever met before.A themB whoC whomD these正确答案:C单选题35.【第20单元】Many children，______ parents are away working in big cities，are taken good care of in the village.A theirB whoseC of themD with whom正确答案:B单选题36.【第20单元】My suggestion yesterday was that a meeting ____ to discuss the matter.A should holdB must be heldC would be heldD be held正确答案:D单选题37.【第20单元】Without your help, I _____ have achieved so much.A can’tB shouldn’tC wouldn’tD musn’t正确答案:C单选题38.【第20单元】All ______ is a continuous supply of the basic necessities of life.A what is neededB the things neededC for our needsD that is needed正确答案:D单选题39.【第20单元】The newly built cafe, the walls of ____ are painted light green, is really a peaceful place for us , especially after hard work.A thatB itC whatD which正确答案:D单选题40.【第20单元】I don’t think it advisable that Tom ____ to the job since he has no experience.A be assignedB is assignedC will be assignedD has been assigned单选题41.【第21单元】October 1,1949 was the day _____ the People’s Republic of China was founded.A whichB whenC whereD in which正确答案:B单选题42.【第21单元】In the dark street, there wasn’t a single person _____ she could turn for help.A thatB whoC from whomD to whom正确答案:D单选题43.【第21单元】October 1,1949 is the day _____ we’ll never forget.A whenB thatC whereD in which正确答案:B单选题44.【第21单元】The lecture spoke of some writers and novels _____ were known to us all.B thatC whoD what正确答案:B单选题45.【第21单元】It was raining hard, _____ kept us indoors.A whichB thatC asD what正确答案:A单选题46.【第21单元】Finally the thief handed in everything _____ he had stolen to the police.A whichB thatC whatD whatever正确答案:B单选题47.【第21单元】I can still remember the sitting room _____ my mother and I used to sit in the evening.A whatB whichC that正确答案:D单选题48.【第21单元】The only question _____ is to find our way home.A that matteredB that mattersC which matteredD matter正确答案:B单选题49.【第21单元】The farmers used wood to build a house _____ grain can be stored.A with whichB whereC in thatD which正确答案:B单选题50.【第21单元】Is this the shop _____ sells children’s clothing?A whichB whereC in whichD what正确答案:A单选题51.【第22单元】This is the school _____ Mr. Smith once taught.B whenC whereD there正确答案:C单选题52.【第22单元】The dictionary _____ he paid 50 yuan for is very useful.A whichB for whichC on whichD about which正确答案:A单选题53.【第22单元】The girl handed everything _____ she had picked up in the street to the police.A whichB in whichC thatD all正确答案:C单选题54.【第22单元】He is the most careful boy _____ I know.A whatB whichC as正确答案:D单选题55.【第22单元】Please show me the book _____ you bought yesterday.A whichB whomC whoseD this正确答案:A单选题56.【第22单元】The man _____ lives next to us is my English teacher.A whomB whichC whoD /正确答案:C单选题57.【第22单元】The girl _____ you saw in the street is Mary.A thatB whoseC whichD as正确答案:A单选题58.【第22单元】This is the best book _____ I have been looking for all this year.B whomC whichD /正确答案:D单选题59.【第22单元】This is the bag _____ my mother bought yesterday.A thatB whoC whomD this正确答案:A单选题60.【第22单元】The robbers shouted, “Hands up! I’ll shoot anyone ______ moves!”A whomB thatC whoD whose正确答案:C单选题61.【第23单元】It’s necessary that he _____ a recognized qualification.A hasB haveC hadD having单选题62.【第23单元】He must have had an accident, or he ______ here then.A would have beenB had beenC should have beenD could be正确答案:A单选题63.【第23单元】We didn't know his telephone number, otherwise we ______ him.A would have telephonedB must have telephonedC would telephoneD had telephoned正确答案:A单选题64.【第23单元】______ cease（停止）advertising, prices would be significantly reduced.A Were they toB Could theyC If theyD Would they正确答案:A单选题65.【第23单元】I wish I _____ longer this morning, but I had to get up and come to class.A could have sleptC might have sleptD have slept正确答案:A单选题66.【第23单元】It's high time we ______ our attention to this problem.A turnedB turnC had turnedD would turn正确答案:A单选题67.【第23单元】We demanded that we ______ of any change in the plan.A informedB would be informedC be informedD had been informed正确答案:C单选题68.【第23单元】If only you ______ him what I said! Everything would have been all right.A didn't toldB hadn't toldC would not tellD would have not told正确答案:B单选题69.【第23单元】Much labour would have been saved if the electronic computers ______ before.A had inventedB were inventedC should have been inventedD had been invented正确答案:D单选题70.【第23单元】Five minutes earlier and we _______ the last bus.A had caughtB should have caughtC could have caughtD caught正确答案:C单选题71.【第24单元】If we _____ yesterday, we ______ the work.A weren't interrupted.., would finishB didn't interrupt.., would have finishedC hadn't been interrupted.., would have finishedD hadn't interrupted.., would have finished正确答案:C单选题72.【第24单元】I didn't know this Picasso exhibit was closed, but I wouldn't have been able to come even if _______ about it.A I knowB I'd knownC I have been knowingD I've known正确答案:B单选题73.【第24单元】Your examination results were quite satisfactory, but _____ if you had spent less time in playing football?A wouldn't they have been betterB wouldn't they be betterC won't they be betterD won't they have been better正确答案:A单选题74.【第24单元】I'd rather you ______ anything about it for the time being.A doB didn't doC don't doD didn't正确答案:B单选题75.【第24单元】I wish that you hadn't had such a bad headache because I'm sure that you _____ the concert.A will enjoyB will have enjoyedC would enjoyD would have enjoyed正确答案:D单选题76.【第24单元】If they _______ the contract ahead of time, they could not have missed the plan.A signedB had signedC would have signedD should sign正确答案:B单选题77.【第24单元】If I _____ the opportunity I would not have missed it.A had givenB was givenC had been givingD had been given正确答案:D单选题78.【第24单元】—“Do you think the thief entered through the garage door?”—“No. If he had, I don't believe he ______ the living room window.”A would have brokenB had brokenC has brokenD broke正确答案:A单选题79.【第24单元】He is working hard for fear that he ______ .A fell behindB may fall behindC should fall behindD would fall behind正确答案:C单选题80.【第24单元】If he ______ hard in the past five years, things wouldn't be going so smoothly.A had not been workingB has not been workingC was not workingD were not working正确答案:A。
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浙江大学远程教育学院《可视化计算》课程作业2016年（夏）姓名：学 号： 年级： 2017春 学习中心：————————————————————————————— 注意：所有图像的标题必须呈现足够你本人信息1.（10分）求解下列线性方程组的解：1620908356215.87320332231074445.06.337925.1=-++=++++=++-+-=--+=++++z y v u z y x v u z y x v u z y x v z y x v uclc;A=[1,1.5,2,9,7;0,3.6,0.5,-4,-4;7,10,-3,22,33;3,7,8.5,21,6;3,8,0,90,-20]B=[3;-4;20;5;16]X=B'/A2.（10分）信号y = 5*sin(pi*20*t)+3*cos(2*pi*50*t)幅度为1的白噪声的干扰，请画出此信号，然后进行傅立叶变换，画出变换后的频域信号。
clear;title('袁洋 717129012012')t=0:0.001:0.6;y=5*sin(pi*20*t)+3*cos(2*pi*50*t);y=y+randn(1,length(t));subplot(1,2,1)plot(t,y)title('袁洋')xlabel('变换前信号')Y=fft(y,512);subplot(1,2,2)Y=real(Y);plot(Y(1:512))title('717129012012')xlabel('变换后的频域信号')3.（10分）在空间有一个带正电的点电荷，请画出此点电荷的空间电位分布与电场强度的空间分布图。
clc;subplot(1,2,1)[x,y]=meshgrid(-4:0.2:4,-4:0.2:4);z=1./sqrt(x.^2+y.^2+0.01);mesh(x,y,z)title('袁洋 717129012012')subplot(1,2,2)[x,y]=meshgrid(-2:0.1:2,-2:0.1:2);z=1./sqrt((x).^2+y.^2+0.01);[dx,dy]=gradient(z);contour(x,y,z,[-12,-8,-5,-3,-1,-0.5,-0.1,0.1,0.5,1,3,5,8,12]);hold onquiver(x,y,dx,dy)title('717129012012')4.（10分）仿照课本第11章的太阳｜地球｜月亮｜卫星，绕转动画实例，呈现地球绕太阳运转的动画。
clc;figure('name','地球绕太阳转动');title('袁洋 717129012012')s1=[0:.01:2*pi];hold on;axis equal;axis offr1=10;w1=1;t=0;pausetime=.002;sita1=0;sita2=0;set(gcf, 'doublebuffer', 'on')plot(-20, 18, 'color', 'r', 'marker', '.', 'markersize', 40);text(-17,18,'太阳');p1=plot(-20,16,'color','b','marker','.','markersize',20);text(-17, 16, '地球');plot(0,0,'color','r','marker','.','markersize',60);plot(r1*cos(s1),r1*sin(s1));set(gca, 'xlim', [-20 20], 'ylim', [-20 20]);p1=plot(r1*cos(sita1), r1*sin(sita1), 'color', 'b', 'marker', '.', 'markersize', 30);while 1set(p1, 'xdata', r1*cos(sita1),'ydata',r1*sin(sita1));sita1=sita1+w1*pausetime;pause(pausetime);drawnowend5.（10分）设计一个低通滤波器，从混合信号：x(t)=sin(2*pi*10*t) + cos(2*pi*100*t) + 0.2*randn(size(t)) 中获取10Hz的信号（10分）。
clear;ws=1000;t=0:1/ws:0.4;x=sin(2*pi*10*t) + cos(2*pi*100*t) + 0.2*randn(size(t));wn=ws/2;[B,A]=butter(10,30/wn);y=filter(B,A,x);plot(t,x,'b-')title('袁洋 717129012012 提取的10HZ信号');hold onplot(t,y,'r.','MarkerSize',10)legend('Input','Output')6.（20分）设计一个程序，应用函数subplot(1,2,1)、subplot(1,2,2)分别显示您本人的二张照片，然后对二张照片分别进行傅立叶变换，并分别画出变换后的频域信号。
再把2个频域信号相加，经傅立叶逆变换后，显示时域信号的图像。
clc;A=imread('D:\Me\正常血压范围.jpg');subplot(1,2,1)imshow(A);title('袁洋 717129012012')B=imread('D:\Me\证件\照片.jpg');subplot(1,2,2)imshow(B);title('袁洋 717129012012')A1=fft2(A);B1=fft2(B);subplot(1,2,1);imshow(A1)title('袁洋 717129012012') subplot(1,2,2);imshow(B1)title('袁洋 717129012012')7.（30分）小论文根据工作中的实际需要，请设计一个实际工程问题的可视化。
可以选择以下之一：（1）工程动画的可视化；（2）大数据处理中的可视化；（3）算法与模型计算的可视化；（4）实际生产流程的可视化；（5）或其它有创新意义的可视化科学计算。
要求：（1）题目有实际意义。
（2）有分析、算法描述（3）程序源代码设计。
（4）问题结果有可视化显示。
（4）题目的问题有一定的新意。
小论文的字数不能少于2500字，格式由下列各部分组成：中文题目Matlab在公司中如何用来计算工资摘要：随着社会的不断发展，许多大型的企业也在迅速崛起，企业员工也从以前的几十个人发展到成百上千，乃至数万人。
可想而知，单纯的靠人力去计算每个人都每月的实发工资肯定是不现实的。
最近学习了Matlab以后，发现它不仅仅能编写一些简单的程序，更可以把许多数据以图像的方式呈献给人们，这对于企业的管理以及工资的统计工作有着巨大的帮助。
因为学习时间也不是很久，所以我在根据已学的知识基础上，参考了一些其他书籍，集合书本上他人的设计经验，自己写了一个小程序，可以很快的计算出一个人每月的实际工资。
中文关键词：图像统计工资英文题目：Matlab in the company how to calculate salary英文摘要：With the continuous development of society, also is in rapid rise, many large enterprises from the dozens of personal d evelopment to enterprise employees also have had hundreds of thousands, even tens of thousands of people. Predictably, t he pure by manpower to calculate each monthly net salary is not realistic. Recent learning Matlab, found that it not o nly can write some simple program, can put a lot more peop le present in the form of image data, for the enterprise m anagement with the help of the statistical work and wages a re huge. Because learning time is not long, so I am to le arn knowledge, based on reference to some other books, a co llection of books on the design experience of others, onesel f write a small program, can quickly calculate the one real wages each month.英文关键词：statistics1.引言Matlab是一套高性能的数值计算和可视化的工具软件。
也是一套十分强大的计算机科学计算、可视化辅助设计和可视化的教学软件。
它的应用十分的广泛，包括科学计算、信号和图像处理、通讯、控制系统计算、测试和测量、财务建模和分析，以及计算生物学等众多科学领域。
日常，我们计算一些数据量小，数据个数不多的文件，可能人工计算也能很快的得出结果，但是在大数据面前，如：每个月的工资统计。
钥匙还是使用人力计算，就需要大量的人和时间，还存在着一定的错误率，这明显是十分没有效率的；但是用Matlab设计一个简单的程序，就能解决所有的问题，更能使正确率达到100%。