同济大学数据库作业lab7,8

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高等数学(同济第七版)第八章课后答案

高等数学(同济第七版)第八章课后答案

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2022年同济大学数据科学与大数据技术专业《操作系统》科目期末试卷A(有答案)

2022年同济大学数据科学与大数据技术专业《操作系统》科目期末试卷A(有答案)

2022年同济大学数据科学与大数据技术专业《操作系统》科目期末试卷A(有答案)一、选择题1、在中断发生后,进入中断处理的程序属于()。

A.用户程序B.可能是应用程序,也可能是操作系统程序C.操作系统程序D.既不是应用程序,也不是操作系统程序2、 OS通常为用户提供4种使用接口,它们是终端命令、图标菜单、系统调用和()A.计算机高级指令B.宏命令C.类似DOS的批命令文件或UNIX的shell文件D.汇编语言3、一个进程被唤醒意味着()。

A.该进程可以重新占用CPUB.优先级变为最大C.PCB移到就绪队列之首D.进程变为运行态4、在多进程的系统中,为了保证公共变量的完整性,各进程应互斥进入临界区。

所谓临界区是指()。

A.一个缓冲区B.一段数据区C.同步机制D.一段程序5、有两个并发执行的进程P1和P2,共享初值为1的变量x。

P1对x加1,P2对x减1。

加1操作和减1操作的指令序列分别如下所示://加1操作load R1,x ① //取x到寄存器R1中inc R1 ②store x, R1:③ //将R1的内容存入x//减1操作load R2,x ① //取x到寄存器R1中inc R2 ②store x, R2:③ //将R1的内容存入x两个操作完成后,x的值()。

A.可能为-1或3B.只能为1C.可能为0,1或2D.可能为-1,0,1或26、采用SPOOLing技术后,使得系统资源利用率()。

A.提高了B.有时提高,有时降低C.降低了D.提高了,但出错的可能性增人了7、某文件占10个磁盘块,现要把该文件磁盘块逐个读入主存缓冲区,并送用户区进行分析。

假设一个缓冲区与一个磁盘块人小相同,把一个磁盘块读入缓冲区的时间为100μs,将缓冲区的数据传送到用户区的时间是50μs.CPU对一块数据进行分析的时间为50us。

在单缓冲区和双缓冲区结构ド,读入并分析完该文件的时间分别是()。

Α.1500μs,1000μsB.1550μs,1100μsC.1550μs,1550μsD.2000μs,2000μs8、下列文件物理结构中,适合随机访问且易于文件扩展的是()。

同济大学数据库作业lab7,8

同济大学数据库作业lab7,8

同济大学《数据库技术及应用》实验报告实验报告题目:建立与数据库的链接和基于绑定的数据库访问姓名:学号:年级:专业:指导教师:日期: 2014 年 11 月 16 日一.实验目的1.掌握数据库访问模型的主要对象和功能2.掌握SQL和数据库的链接方法3.学习绑定对象的操作方法二.实验内容(实验题目+运行界面截图+实现代码)1.掌握前台和SqlServer后台的链接方法Imports Class Form1Private Sub Form1_Load(sender As Object, e As EventArgs) HandlesDim myconn As New SqlConnection("database=university;data source=jd43\SQLEXPRESS; integrated security=true")Dim mysql As String = "select * from student"Dim myadapter As New SqlDataAdapter(mysql, myconn)Dim mydataset As New DataSet(mydataset, "student")= (0)End SubEnd Class2.在university上用完成如下界面Imports Class Form2Private Sub Form2_Load(sender As Object, e As EventArgs) HandlesDim myconn As New SqlConnection("database=university;data source=jd43\SQLEXPRESS; integrated security=true")Dim mysql As String = "select as '学号',sname as '姓名',count(secnum) as '选修课程门数',avg(score) as '平均成绩',sum(1-score/60) as '不及格门数' from student,sc where = group by ,sname"Dim myadapter As New SqlDataAdapter(mysql, myconn)Dim mydataset As New DataSet(mydataset, "student")= (0)End SubEnd Class3.建立university和student的浏览界面Imports Class Form1Dim mybind As New BindingSourceDim mysql As String = "select * from student"Dim myconn As New SqlConnection("database=university;data source=jd43\SQLEXPRESS;integrated security=true")Dim myadapter As New SqlDataAdapter(mysql, myconn)Dim mydataset As New DataSetPrivate Sub退出系统ToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles退出系统EndEnd SubPrivate Sub Form1_Load(sender As Object, e As EventArgs) Handles(mydataset, "student")= mydataset= "student"Binding("text", mybind, "snum", True))Binding("text", mybind, "sname", True))Binding("text", mybind, "sex", True))Binding("text", mybind, "dept", True))Binding("text", mybind, "birthday", True))End SubPrivate Sub Button4_Click(sender As Object, e As EventArgs) Handles ()End SubPrivate Sub Button5_Click(sender As Object, e As EventArgs) Handles ()End SubPrivate Sub Button6_Click(sender As Object, e As EventArgs) Handles ()End SubPrivate Sub Button7_Click(sender As Object, e As EventArgs) Handles ()End SubPrivate Sub Button1_Click(sender As Object, e As EventArgs) Handles ()End SubPrivate Sub Button2_Click(sender As Object, e As EventArgs) Handles ()End SubPrivate Sub Button3_Click(sender As Object, e As EventArgs) Handles ()()Dim cm As New SqlCommandBuilder(myadapter)(0))End SubEnd Class4.完成学生成绩浏览功能的设计Imports Class Form2Dim mybind As New BindingSourceDim mysql As String = "select * from shiyan8"Dim myconn As New SqlConnection("database=university;data source=jd43\SQLEXPRESS;integrated security=true")Dim myadapter As New SqlDataAdapter(mysql, myconn)Dim mydataset As New DataSetPrivate Sub Form2_Load(sender As Object, e As EventArgs) Handles(mydataset, "shiyan8")= mydataset= "shiyan8"Binding("text", mybind, "snum", True))Binding("text", mybind, "sname", True))Binding("text", mybind, "cname", True))Binding("text", mybind, "score", True))End SubPrivate Sub Button1_Click(sender As Object, e As EventArgs) Handles()End SubPrivate Sub Button2_Click(sender As Object, e As EventArgs) Handles()End SubPrivate Sub Button3_Click(sender As Object, e As EventArgs) Handles()End SubPrivate Sub Button4_Click(sender As Object, e As EventArgs) Handles()End SubEnd Class三.实验体会或收获(有感而发,没有体会也可以不写)在用代码进行数据库的链接时发现data source后不能加(local),否则总是显示无法访问。

同济大学数据库-实验一答案

同济大学数据库-实验一答案

同济⼤学数据库-实验⼀答案实验⼀讲解By Zhu Jing12主窗体MainForm 运⾏界⾯0.主窗体项⽬解决⽅案资源管理器主窗体主要属性设置:IsMdiContainer为True(设置主窗体为多⽂档界⾯容器);WindowState为Maximized(运⾏时最⼤化)3主窗体代码:Public Class MainFormApplication.Exit()End SubPrivate Sub 实验1ToolStripMenuItem_Click(…) …Dim f1 As New shiyan1()f1.MdiParent = Mef1.Show()End SubPrivate Sub 实验2ToolStripMenuItem_Click(…) …Dim f2 As New shiyan2()f2.MdiParent = Mef2.Show()End Sub4Private Sub 实验3ToolStripMenuItem_Click(…)…Dim f3 As New shiyan3()f3.MdiParent = Mef3.Show()End SubPrivate Sub 实验4ToolStripMenuItem_Click(…) …Dim f4 As New shiyan4()f4.MdiParent = Mef4.Show()End SubPrivate Sub 实验5ToolStripMenuItem_Click(...) …Dim f5 As New shiyan5()f5.MdiParent = Mef5.Show()End Sub.5Private Sub 实验6ToolStripMenuItem_Click(…) …Dim f6 As New shiyan6()f6.MdiParent = Mef6.Show()End SubDim f7_1As New shiyan7_1()f7_1.Show()End SubPrivate Sub 实验8ToolStripMenuItem_Click(…) …Dim f8 As New shiyan8()f8.MdiParent = Mef8.Show()End SubEnd Class61. 实验1:⽂本框练习7实验1代码:Public Class shiyan1Private Sub Button1_Click(…) …'⾪书按钮TextBox1.Font = New Font("⾪书", 25, FontStyle.Bold Or FontStyle.Italic) End Sub Private Sub Button2_Click(…) …'幼圆按钮TextBox1.Font = New Font("幼圆", 18, FontStyle.Italic Or FontStyle.Underline) End Sub 8Private Sub Button3_Click(…) …'复制按钮TextBox2.Text = TextBox1.SelectedTextTextBox2.Font = TextBox1.FontEnd SubEnd Class92. 实验2:求鸡和兔的个数10实验2代码:Public Class shiyan2Private Sub TextBox2_KeyDown(…) …If e.KeyCode = Keys.Enter ThenDim x, y As Integer 'x--鸡数,y--兔数If Not IsNumeric(TextBox1.Text.Trim) ThenMessageBox.Show("'头数'必须输⼊数字", "警告")TextBox1.Text = ""TextBox3.Text = ""Exit SubEnd If11If Not IsNumeric(TextBox2.Text.Trim) Then MessageBox.Show("'脚数'必须输⼊数字", "警告") Me.TextBox2.Text = "" Me.TextBox3.Text = ""Exit SubEnd IfIf Val(TextBox2.Text.trim) Mod 2 <> 0 Then MessageBox.Show("脚必须是双数", "警告")TextBox2.Focus()Exit SubEnd If12x = Val(4 * TextBox1.Text -TextBox2.Text) / 2y = Val(TextBox2.Text -2 * TextBox1.Text) / 2If x < 0 Or y < 0 Then '若头数是负数MsgBox("荒唐解,请重新输⼊!")Me.TextBox3.Text = ""ElseTextBox3.Text = x & " " & yEnd IfEnd IfEnd SubEnd Class13143. 实验3:求解1元2次⽅程的根实验3运⾏界⾯实验3代码:Imports System.MathPublic Class shiyan3Dim a, b, c, disc, realpart, imagpart As DoublePrivate Sub Button1_Click(…) …'计算按钮If String.IsNullOrEmpty(TextBox1.Text.Trim()) And String.IsNullOrEmpty(TextBox2.Text.Trim()) Then MsgBox("请为a,b赋值")Exit SubEnd IfIf TextBox1.Text.Trim() = "" ThenTextBox1.Text = 0End If15If TextBox2.Text.Trim() = "" ThenTextBox2.Text = 0End IfIf TextBox3.Text.Trim() = "" ThenTextBox3.Text = 0End Ifa = TextBox1.Text.Trimb = TextBox2.Text.Trimc = TextBox3.Text.TrimIf a = 0 Then 'a为0时If b<> 0 Then 'a为0,b不为0时TextBox4.Text = Round(-c / b, 2)TextBox5.Text = ""GroupBox1.Text = "不是2次⽅程,只有⼀个根" Else 'a,b都为0时MsgBox("a,b不能同时为0")End If16Elsedisc = b * b -4 * a * cIf disc = 0 Then ' disc为0时GroupBox1.Text = "有两个相同的实根" TextBox4.Text = Round(-b / (2 * a), 2) TextBox5.Text = Round(-b / (2 * a), 2) ElseIf disc > 0 Then ' disc ⼤于0时GroupBox1.Text = "有两个不同的实根" TextBox4.Text =Round((-b + Sqrt(disc)) / (2 * a), 2) TextBox5.Text =Round((-b -Sqrt(disc)) / (2 * a), 2)Else ' disc⼩于0时GroupBox1.Text = "有两个不同的虚根" realpart = Round(-b / (2 * a), 2)imagpart = Round(Sqrt(-disc) / (2 * a), 2)17TextBox4.Text = realpart & "+" & imagpart & "i" TextBox5.Text = realpart & "-" & imagpart & "i" End IfEnd IfEnd SubPrivate Sub Button2_Click(…) …'结束按钮Me.Close()End SubEnd Class18194. 实验4:⽣成随机数实验4运⾏界⾯。

数据库第8章习题参考答案

数据库第8章习题参考答案

第8章习题参考答案2.求程序的运行结果(1)Public Sub 习题8_2_1()Dim i As IntegerDebug.Print Tab(10); "*"For i = 1 To 5Debug.Print Tab(10 - i); "*"; Spc(i - 1); "*"; Spc(i - 1); "*"Next iFor i = 4 To 1 Step -1Debug.Print Tab(10 - i); "*"; Spc(i - 1); "*"; Spc(i - 1); "*"Next iDebug.Print Tab(10); "*"End Subrun:***** * ** * ** * ** * ** * ** * ** * *****(2)Public Sub 习题4_2_2()Dim x, y, i As Doublex = 0: y = 0For i = 1 To 8If i Mod 2 <> 0 Thenx = x - iElsey = y + iEnd IfNextDebug.Print "i="; iDebug.Print "x="; xDebug.Print "y="; yEnd Subrun:x=-16y= 20(3)Public Sub习题4_2_3()Dim m, s, k As Doublem = 28s = 0k = 1Do While k <= Int(m / 2)If Int(m / k) = m / k ThenDebug.Print ks = s + kEnd Ifk = k + 1LoopDebug.Print "s="; sEnd Subrun:124714s= 28(4)Public Sub 习题8_2_4()Dim n, a1, a2, a3, i As Doublen = Val(InputBox("请输入n,要求n>=3"))If n <= 2 ThenExit SubEnd Ifa1 = 1a2 = 1Debug.Print a1; a2For i = 2 To n - 1a3 = a1 + a2a1 = a2a2 = a3Debug.Print a3NextEnd Sub1 12353.改错题(1)Public Sub 改错8_3_1()Dim i, n, s As Doublen = Val(InputBox("请输入n"))i = 2: s = 1Do While i <= ns = s + ii = i + 1LoopDebug.Print "S="; sEnd Sub(2)Public Sub 改错8_3_2_求分式多项和()Dim nm, n, k ,p As integerDim y As Doublenm = Val(InputBox("请输入计算公式1后面的项目数目个数")) n = 1: p = 1: y = 1Do While n <= nmk = 2 * n + 1p = p * (k - 1) * ky = y + ((-1) ^ n) / pn = n + 1LoopDebug.Print "y="; yEnd Sub4.编程题(1)用if……else语句编程Public Sub分段函数1()Dim x, y, z As Doublex = Val(InputBox("请输入x的值:"))y = Val(InputBox("请输入y的值:"))If x > y And y <> 0 Thenz = x / yElseIf x = y Thenz = x * y * Sgn(y)Elsez = x + yEnd IfDebug.Print "x="; xDebug.Print "y="; yDebug.Print "z="; zEnd Sub(1)用select case语句结构编程Public Sub分段函数2()Dim x, y, z, a As Doublex = Val(InputBox("请输入x"))y = Val(InputBox("请输入y"))a = y - xSelect Case aCase Is > 0z = x + yDebug.Print zCase 0z = x * y * Sgn(y)Debug.Print zCase ElseIf y <> 0 Thenz = x / yDebug.Print zElseDebug.Print "z没有值"End IfEnd SelectEnd Sub(2)Public Sub 求解一元二次方程()Dim a, b, c As IntegerDim d, x1, x2, x3, x4 As Doublea = Val(InputBox("请输入a的整型数:"))b = Val(InputBox("请输入b的整型数:"))c = Val(InputBox("请输入c的整型数:"))d = b * b - 4 * a * cIf d > 0 Thenx1 = (-b + Sqr(d)) / (2 * a)x2 = (-b - Sqr(d)) / (2 * a)Debug.Print "x1="; x1, "x2="; x2Else if d=0 thenx3 = -b / (2 * a)x4 = -b/ (2 * a)Debug.Print "x3=";x3Debug.Print "x4=";x4ElseDebug.Print "方程没有实数解"End IfEnd Sub(3--1)用无条件转向语句GOTO编程Public Sub 数字与星期的转换1()Dim num As Integer10 num = Val(InputBox("请输入整数值:")) If num = 0 ThenDebug.Print "这是星期日"ElseIf num = 1 ThenDebug.Print "这是星期一"ElseIf num = 2 ThenDebug.Print "这是星期二"ElseIf num = 3 ThenDebug.Print "这是星期三"ElseIf num = 4 ThenDebug.Print "这是星期四"ElseIf num = 5 ThenDebug.Print "这是星期五"ElseIf num = 6 ThenDebug.Print "这是星期六"ElseIf num = -1 ThenDebug.Print "程序运行结束"EndElseDebug.Print "输入数据错误!"GoTo 10End IfEnd Sub(3--2)Public Sub数字与星期的转换2 ()Dim x As IntegerDo While Truex = Val(InputBox("请输入数字"))If x = 0 ThenDebug.Print "这是星期日"Exit DoElseIf x >= 1 And x <= 6 ThenDebug.Print "这是星期" + Str(x)Exit DoElseIf x = -1 ThenExit DoElseMsgBox ("输入数据错误!")End IfLoopEnd Sub(4)Public Sub 行李重量计费()Dim an, cn, weight, s_w, distance, fee As Doublean = Val(InputBox("请输入成年人数量"))cn = Val(InputBox("请输入未成年人数量"))weight = Val(InputBox("请输入行李重量"))distance = Val(InputBox("请输入距离"))s_w = weight - 20 * an - 10 * cnIf s_w <= 0 Thenfee = 0ElseIf distance / 100 = Int(distance / 100) Thenfee = 0.2 * s_w * (distance / 100)Elsefee = 0.2 * s_w * (Int(distance / 100) + 1) End IfEnd IfDebug.Print feeEnd Sub(5)Public Sub 求自然数的多项式和()Dim n, s As Integers = 0For n = 1 To 10s = s + (s + n)NextDebug.Print "S=1+(1+2)+(1+2+3)+...+1+2+3+...+10)="; s End SubRun:S=1+(1+2)+(1+2+3)+...+1+2+3+...+10)= 2036Public Sub 求多项自然数阶乘的和()Dim s, t As SingleDim n As Integert = 1s = 0For n = 1 To 20t = t * ns = s + tNextDebug.Print "1!+2!+3!+...+20!="; sEnd SubRun:1!+2!+3!+...+20!= 2.561327E+18(6)Public Sub 既能被3整除又能被5整除正整数个数() Dim i, x As Integerx = 0For i =100 To 200If i / 3 = Int(i / 3) And i / 5 = Int(i / 5) ThenDebug.Print ix = x + 1End IfNextDebug.Print "x="; xEnd SubRun:120135150165180195x= 7(7)Public Sub 输出直角三角形图案1()Dim i, j As IntegerFor i = 1 To 9Debug.PrintNextFor i = 1 To 4Debug.Print Tab(20); "*";For j = 1 To (2 * i - 2)Debug.Print "*";NextDebug.PrintNextEnd SubRun:****************Public Sub 输出直角三角形图案2() Dim i, j As IntegerFor i = 1 To 9Debug.PrintNextDebug.Print Tab(20); "*";For i = 1 To 4Debug.Print Tab(19 - i); "*";For j = 1 To (i + 1)Debug.Print "*";NextDebug.PrintNextEnd SubRun:*******************Public Sub 输出平行四边形图案() Dim i, j As IntegerFor i = 1 To 9Debug.PrintNextFor i = 1 To 5Debug.Print Tab(21 - i);For j = 1 To 6Debug.Print "*";NextDebug.PrintNextEnd SubRun:******************************(8)Public Sub 求选手获得的平均分()Dim score(1 To 11), minno, maxno, sum, aver As Single Dim i As Integerminno = 1maxno = 1sum = 0For i = 1 To 10score(i) = Val(InputBox("请输入选手的成绩值:")) Debug.Print score(i)NextFor i = 2 To 10If score(i) < score(minno) Thenminno = iEnd IfIf score(i) > score(maxno) Thenmaxno = iEnd IfNext iFor i = 1 To 10sum = sum + score(i)Next isum = sum - score(minno) - score(maxno)aver = sum / 8Debug.Print "该选手的平均分是:"; averEnd Sub(9)关于素数的求解(9-1)求100之内的所有素数Public Sub 求所有素数之和()Dim s, w, n As Integers = 0For w = 2 To 99 Step 2For n = 2 To Sqr(w)If w Mod n = 0 ThenExit ForEnd IfNextIf n > Sqr(w) Thens = s + wEnd IfDebug.Print "S="; sNextEnd Sub(9-2)Public Sub 求200以内的所有素数()Dim w, n As IntegerDebug.Print "200 以内的所有素数是:" For w = 2 To 199For n = 2 To Sqr(w)If w Mod n = 0 ThenExit ForEnd IfNext nIf n > Sqr(w) ThenDebug.Print w;End IfNextDebug.PrintEnd Sub(10)Public Sub 求水仙花数1()Dim i, j, k, n As IntegerDebug.Print "水仙花数是:"For i = 1 To 9For j = 0 To 9For k = 0 To 9n = i * 100 + j * 10 + kIf n = i * i * i + j * j * j + k * k * k ThenDebug.Print n;End IfNext kNext jNext iDebug.PrintEnd SubPublic Sub 求水仙花数2()Dim i, j, k, n As IntegerDebug.Print "水仙花数是:"For n = 150 To 999i = Int(n / 100)j = Int(n / 10 - i * 10)k = n Mod 10If n = i * i * i + j * j * j + k * k * k ThenDebug.Print n;End IfNextDebug.PrintEnd Subrun:水仙花数是:153 370 371 407(11)Public Sub 求分数数列和()Dim i, t, n As IntegerDim a, b, s As Singlen = 20a = 2:b = 1: s = 0For i = 1 To ns = s + a / bt = aa = a + bb = tNextDebug.Print "sum="; s;End Sub(12)Public Sub N年达到的利息()Dim y As IntegerDim interest1,interest As DoubleP=10000y = 0interest = 0Do Until interest >= 1000Interest1 =2*p* 0.0225 *(1-0.2) ‘一期2年整存整取扣税后的利息p=p+interest1 ‘扣税后的利息加上本金成为新一期的本金Interest=p-10000 ‘存款以来实际所的利息y = y + 2Debug.Print interest, yLoopEnd SubRun:360 2732.959999999999 4 1119.34656 6。

中南大学matlab课后习题(1)

中南大学matlab课后习题(1)

%用循环结构实现
a=0;
for i=1:n
a=a+1/(i^2);
end
disp(a);
j=1:n;
%用 sum 函数实现
b=sum(1./(j.^2)); 输入一个数:34
b=
(2)( )( )( ) (
) (= )
clear n=input('输入一个数:'); a=1; for i=1:n a=((2*i*i*2)/((2*i-1)*(2*i+1)))*a; end disp(a); 输入一个数:8
1/5 1/6 1/7 1/8
1/5
1/6
1/7
1/8
1/9
P=pascal(5)
P= 1 1 1 1 1
1
1
1
1
2
3
4
5
3
6
10
15
4
10
20
35
5
15
35
70
Hh=det(H)
Hh = 1/0000
Hp=det(P)
Hp = 1
Th=cond(H)
Th = 476607
Tp=cond(P)
Tp = 178868/21 P 矩阵性能更好,因为 Tp 更接近 1. 5.已知 A,求 A 的特征值及特征向量,并分析其数学意义。 A=[-29,6,18;20,5,12;-8,8,5]
min=a(i); end end max min 请输入二十个数[ 3 4 6 5 3 44 5 5 5 6 6 5 5 4 3 32 2 2 2 6]
max =
44
min =
2
4.
,当 a 取、、、…、、、时,求各点的函数值。要求分别用顺序结

Lab7_1(实验9-创建类图)

Lab7_1(实验9-创建类图)

Before You Begin

Do not begin this lab until you’ve completed Module 7: Class Diagrams in the Student Manual.
Objective
In Lab 7-1, you will do the following: 1. Add class diagram to the browser. 2. Add classes to the diagram. 3. Add associations. 4. Add role names and multiplicity.

The design classes already exist in the model. Drag these elements from the browser into the diagram window. Find them under the appropriate layers and class packages. Go to Task 3 to add the associations.
7-4
Fundamentals of Rational Rose Student Workbook
Try These Activities
If there is time, explore the following:

Add another role name. Add Prospective Buyer to describe the role that the BuyerRecord entity class plays with the control class. Add the role name by right-clicking the appropriate end of the association, and the clicking Role Name. Type the name. Add the multiplicity indicators to the above relationship. Each end of the association will have 0..1 as the indicator. Use either the Specification window or right-click feature to add. Change an association to an aggregation. Double-click the association to open its Specification window, and then click the appropriate role’s detail tab (the one at the end without the arrow). Click the Aggregate button. Note that you can also delete the association relationship, and then click the Unidirectional Aggregation icon from the diagram toolbar. Change the aggregation to a composition. Double-click the aggregation to open its Specification window, and then click the appropriate role’s detail tab. Select By Value. Class diagrams can be complex. Therefore, you may want to make them less cluttered by not showing attributes and operations. Right-click a class, and then click Options. Deselect Show All Operations. Change the stereotype display for a class. Right-click a class, and then click Options. Select Stereotype Display, and then click Label.

运筹学答案第八章

运筹学答案第八章

page 24 8 August 2024
School of Management
运筹学教程
第八章习题解答
8.15 如图8-59,发点S1,S2分别可供应10和15个 单边位上,数收为c点ij。t1,t2可以接收10和25个单位,求最大流,
page 25 8 August 2024
School of Management
运筹学教程
第八章习题解答
8.11 求图8-56中v1到各点的最短路。
page 17 8 August 2024
School of Management
运筹学教程
第八章习题解答
page 18 8 August 2024
School of Management
运筹学教程
第八章习题解答
8.12 求图8-57网络中各顶点间的最短路。
page 31 8 August 2024
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运筹学教程
第八章习题解答
page 32 8 August 2024
School of Management
运筹学教程
第八章习题解答
心B货1B,中18,B心.22B,的02,运B某3B输每种3。能天货A力需物1,由、求A2单分个2的位别仓库运为库存费9At量,如1,分5表At别,28运—为64t送。每,到天各求31仓运个3t库费配,到最货9t配;省中
20 0 36 14 32
D(4)
0
20
18
0
32
12
48
9
0
V1 V2 V3 V4 V5
V1 0 5 16 19 12
V2 20 0 36 14 32

(完整版)武汉大学matlab期末课程作业

(完整版)武汉大学matlab期末课程作业

“MATLAB及其应用”课程作业院系:姓名:学号:联系方式:1. 请指出如下5个变量名中,哪些是合法的? abcd-2 xyz_3 3chan a 变量 ABCDefgh答:xyz_3,ABCDefgh 是合法的。

2. 在命令窗中,运行命令a=sqrt(2)。

然后请回答以下问题:计算结果a吗?该计算结果只是5近似吗?请在命令窗中,显示出具有最多位有MATLAB 数值结果显示的默认设置。

该计算结果只是5近似。

3. 命令clear, clf, clc 各有什么用处?答:clear 可以清除matlab 工作空间中保持的变量。

clf 可以清除图形窗。

clc 清除命令窗中显示内容。

4. 想要在MATLAB 中产生二维数组⎥⎥⎥⎦⎤⎢⎢⎢⎣⎡=987654321S ,下面哪些命令能实现目的? S=[1,2,3;4,5,6;7,8;9]S=[1 2 3;4 5 6;7 8 9]S=[1,2,3;4,5,6;7,8,9] %整个命令在中文状态下输入答:第二条S=[1 2 3;4 5 6;7 8 9]能实现目的。

中文状态下逗号不是有效字符。

1.说出以下四条命令产生的结果各属于哪种数据类型,是“双精度”对象,还是“符号”对象?3/7+0.1, sym(3/7+0.1), vpa(sym(3/7+0.1),4), vpa(sym(3/7+0.1))答:3/7+0.1结果是双精度。

sym(3/7+0.1)结果是符号。

vpa(sym(3/7+0.1),4)结果是符号。

vpa(sym(3/7+0.1))结果是符号。

过程如图:2.已知a1=sin(sym(pi/4)+exp(sym(0.7)+sym(pi/3)))产生精准符号数字,请回答:以下产生的各种符号数哪些是精准的?若不精准,误差又是多少?能说出产生误差的原因吗?a2=sin(sym(pi/4)+exp(sym(0.7))*exp(sym(pi/3)))a3=sin(sym('pi/4')+exp(sym('0.7'))*exp(sym('pi/3')))a4=sin(sym('pi/4')+exp(sym('0.7+pi/3')))a5=sin(sym(pi/4)+exp(sym(0.7+pi/3)))a6=sin(sym(pi/4)+sym(exp(0.7+pi/3)))a7=sin(sym(pi/4+exp(0.7+pi/3)))a8=sym(sin(pi/4+exp(0.7+pi/3)))(提示:可用vpa观察误差;注意数位的设置)。

同济大学操作系统L18_E:存储管理(离散分配方式)

同济大学操作系统L18_E:存储管理(离散分配方式)
块号1024即ikb页内相对地址内存空间的物理地址说明页表一般是存放在内存中的即划分某些内存区域存放页表而它的起始地址是存放在专门的寄存器中以便地址转换机构能快速找到页表这个寄存器称为页表始址寄存器
L18_E:存储管理之离散分配方式
一、单项选择题 1. 分页系统的页面是为 A. 用户/操作系统 C. 编译系统/操作系统 所感知的,对 是透明的。 B. 操作系统/用户 D. 连接装配程序/编译系统
若逻辑地址为(2154) ,它对应的物理地址为____________。 A. 120K+2 B. 480K+154 C. 30K+154 D. 2+480K 13. 如果一个程序为多个进程所共享,那么该程序的代码在执行的过程中不能被修改, 即 程序应该是________。 A. 可执行码 B. 可重入码 C. 可改变码 D. 可再现码 14. 在段页式存储管理中,其虚拟地址空间是 A. 一维 B. 二维 C. 三维 空间。 D. 层次
42. 在几乎所有的程序执行中,在一段时间内,CPU 总是集中地访问程序中的某一部分,而 不是随机地对程序所有部分具有平均访问的概率。 () 五、简答题 43. 为了提高地址转换速度, 页式存储管理增加一张快表 (联想存储器) 存放页表的一部分, 说明其处理方法。 44. 段式存储管理对与内存空间的共享与保护如何进行? 45. 给出段页式存储管理中,地址转换的步骤。 46. 段式存储管理可以采用“段的动态连接” ,简述“段的动态连接”的含义。 六、应用题 47. 分页式存储空间的分配由于块的大小是固定的,可以用一张位示图来构成主存分配表。 现设主存有 8192 块,则可用字长为 32 位的 256 个字作为位示图。若块号、字号、位号 (从高位到低位)都是从 0 开始,试问 4999 块对应的字号和位号;129 字的 29 位对应 哪一块? 48. 某页式存储器用户地址空间有 32 个页面,每页 1KB,主存 16KB。假定某时刻为用户的 第 0,1,2,3 号页面分配的物理页号为 5,10,4,7,试将虚拟地址 0A5C 和 0D3C 变 化成物理地址。 49. 假定某采用页式存储管理的系统中, 主存容量为 1M, 被分成 256 块, 块号为 0, 1, 2, „„ 255。现有一个共 4 页(页号为 0,1,2,3)的作业被依次装人到主存的第 2,4,1,5 块中。请回答: (1)主存地址应该用多少位来表示? (2)作业每一页的长度为多少字节?逻辑地址中的页内地址部分应占用多少位? (3)把作业中每一页占用的主存块起始地址填人下表。 页号 0 1 2 3 起始地址

同济大学数据库作业

同济大学数据库作业

同济大学《数据库技术及应用》实验报告实验报告题目:建立与数据库的链接和基于绑定的数据库访问姓名:学号:年级:专业:指导教师:日期: 2014 年 11 月 16 日一.实验目的1.掌握数据库访问模型的主要对象和功能2.掌握SQL和数据库的链接方法3.学习绑定对象的操作方法二.实验内容(实验题目+运行界面截图+实现代码)1.掌握前台和SqlServer后台的链接方法Imports Class Form1Private Sub Form1_Load(sender As Object, e As EventArgs) HandlesDim myconn As New SqlConnection("database=university;data source=jd43\SQLEXPRESS; integrated security=true")Dim mysql As String = "select * from student"Dim myadapter As New SqlDataAdapter(mysql, myconn)Dim mydataset As New DataSet(mydataset, "student")= (0)End SubEnd Class2.在university上用完成如下界面Imports Class Form2Private Sub Form2_Load(sender As Object, e As EventArgs) HandlesDim myconn As New SqlConnection("database=university;data source=jd43\SQLEXPRESS; integrated security=true")Dim mysql As String = "select as '学号',sname as '姓名',count(secnum) as '选修课程门数',avg(score) as '平均成绩',sum(1-score/60) as '不及格门数' from student,sc where = group by ,sname"Dim myadapter As New SqlDataAdapter(mysql, myconn)Dim mydataset As New DataSet(mydataset, "student")= (0)End SubEnd Class3.建立university和student的浏览界面Imports Class Form1Dim mybind As New BindingSourceDim mysql As String = "select * from student"Dim myconn As New SqlConnection("database=university;datasource=jd43\SQLEXPRESS;integrated security=true")Dim myadapter As New SqlDataAdapter(mysql, myconn)Dim mydataset As New DataSetPrivate Sub退出系统ToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles 退出系统EndEnd SubPrivate Sub Form1_Load(sender As Object, e As EventArgs) Handles(mydataset, "student")= mydataset= "student"Binding("text", mybind, "snum", True))Binding("text", mybind, "sname", True))Binding("text", mybind, "sex", True))Binding("text", mybind, "dept", True))Binding("text", mybind, "birthday", True))Binding("text", mybind, "telephone", True))End SubPrivate Sub Button4_Click(sender As Object, e As EventArgs) Handles ()End SubPrivate Sub Button5_Click(sender As Object, e As EventArgs) Handles ()End SubPrivate Sub Button6_Click(sender As Object, e As EventArgs) Handles ()End SubPrivate Sub Button7_Click(sender As Object, e As EventArgs) Handles ()End SubPrivate Sub Button1_Click(sender As Object, e As EventArgs) Handles ()End SubPrivate Sub Button2_Click(sender As Object, e As EventArgs) Handles ()End SubPrivate Sub Button3_Click(sender As Object, e As EventArgs) Handles ()()Dim cm As New SqlCommandBuilder(myadapter)(0))End SubEnd Class4.完成学生成绩浏览功能的设计Imports Class Form2Dim mybind As New BindingSourceDim mysql As String = "select * from shiyan8"Dim myconn As New SqlConnection("database=university;datasource=jd43\SQLEXPRESS;integrated security=true")Dim myadapter As New SqlDataAdapter(mysql, myconn)Dim mydataset As New DataSetPrivate Sub Form2_Load(sender As Object, e As EventArgs) Handles(mydataset, "shiyan8")= mydataset= "shiyan8"Binding("text", mybind, "snum", True))Binding("text", mybind, "sname", True))Binding("text", mybind, "cname", True))Binding("text", mybind, "score", True))End SubPrivate Sub Button1_Click(sender As Object, e As EventArgs) Handles ()End SubPrivate Sub Button2_Click(sender As Object, e As EventArgs) Handles()End SubPrivate Sub Button3_Click(sender As Object, e As EventArgs) Handles()End SubPrivate Sub Button4_Click(sender As Object, e As EventArgs) Handles()End SubEnd Class三.实验体会或收获(有感而发,没有体会也可以不写)在用代码进行数据库的链接时发现data source后不能加(local),否则总是显示无法访问。

GitLab7搭建

GitLab7搭建

官网:https:///安装参考网址:https:///downloads/环境Ubuntu 14.04如果是虚拟机的话要改成桥接模式让局域网内其他计算机访问网络设置1.宿主机网络配置:连接特定的 DNS 后缀: pnp.gw描述: Intel(R) WiFi Link 1000 BGN物理地址: 74-E5-0B-99-52-22已启用 DHCP: 是IPv4 地址: 172.31.0.229IPv4 子网掩码: 255.255.248.0IPv4 默认网关: 172.31.0.1IPv4 DHCP 服务器: 172.31.0.1IPv4 DNS 服务器: 223.5.5.5, 223.6.6.6根据宿主机手动配置虚拟机的网络2.虚拟机网络配置:IPv4 地址: 172.31.0.199IPv4 子网掩码: 255.255.248.0IPv4 默认网关: 172.31.0.1IPv4 DNS 服务器: 223.5.5.5, 223.6.6.6检查下虚拟机能否上网。

如果不能上网的会影响后面GitLab发送邮件。

检查下能否被局域网的其他计算机访问安装下载1.Download the package and install everything默认管理员账号密码:Username: rootPassword: 5iveL!feFor troubleshooting and configuration optionshttps:///gitlab-org/omnibus-gitlab/blob/master/README.md 配置1.配置postfixsudodpkg-reconfigure postfix选择internetdomain:hostname:smtpserver:destination:localhost备份下原来的配置sudocp /etc/postfix/main.cf/etc/postfix/main.cf_bak修改配置填写smtp服务器登录信息:添加smtp登录信息:sudopostmap /etc/postfix/sasl_passwdsudo postfix reloadsudo postfix stopsudo postfix start2.配置GitLabexternal_url,虚拟机的ip地址external_url "http:// 172.31.0.199"GitLab的邮件地址:最好是smtp邮件发送服务器的邮箱地址gitlab_rails['gitlab_email_from'] = 'yuanzhencai1990@'重启GitLabsudo gitlab-ctl reconfigure查看GitLab状态查看GitLab日志sudogitlab-ctl tail至此,GItLab配置结束使用访问使用虚拟机ip地址访问:172.31.0.199,默认管理员账号登录。

ANSYS APDL命令流详解-9网格划分技术

ANSYS APDL命令流详解-9网格划分技术
3.3 网格划分高级技术
面映射网格划分/体映射网格划分 扫掠生成体网格/单元有效性检查/网格修改
3.4 网格划分实例
基本模型的网格划分/复杂面模型的网格划分 复杂体模型的网格划分
创建几何模型后,必须生成有限元模型才能 分析计算,生成有限元模型的方法就是对几何 模型进行网格划分,网格划分主要过程包括三 个步骤: ⑴ 定义单元属性
3.1 定义单元属性 —材料属性
每一组材料属性有一个材料参考号,用于识别各个材料特
性组。一个模型中可有多种材料特性组。 1. 定义线性材料属性 命令:MP,Lab,MAT,C0,C1,C2,C3,C4 Lab---材料性能标识,其值可取:
EX:弹性模量(也可为EY、EZ)。 ALPX:线膨胀系数(也可为ALPY、ALPZ)。 PRXY:主泊松比(也可为PRYZ、PRXZ)。 NUXY:次泊松比(也可为NUYZ、NUXZ)。 GXY:剪切模量(也可为GYZ、GXZ)。 DAMP:用于阻尼的K矩阵乘子,即阻尼比。 DMPR:均质材料阻尼系数。 MU:摩擦系数 。 DENS:质量密度。
与下列两条命令等效:
et,1,beam4,,1
et,3,beam189,1
3.1 定义单元属性 —单元类型
3. 自由度集 命令:DOF,Lab1,Lab2,Lab3,Lab4,Lab5,Lab6,Lab7,Lab8,Lab9,Lab10
4.改变单元类型 命 令:ETCHG,Cnv
5. 单元类型的删除与列表 删除命令:ETDELE,ITYP1,ITYP2,INC 列表命令:ETLIST,ITYP1,ITYP2,INC
单元属性包括单元类型、实常数、材料特性、单元坐标系和截 面号等。
⑵ 定义网格控制选项
★对几何图素边界划分网格的大小和数目进行设置; ★没有固定的网格密度可供参考; ★可通过评估结果来评价网格的密度是否合理。

通信网络-Lab7-1. DeviceNet网络组态

通信网络-Lab7-1. DeviceNet网络组态

Lab7-1. DeviceNet网络组态情景模拟:工厂新添置了一台设备并带DeviceNet接口,电气工程主管找到你,说他需要你通过DeviceNet网络控制该设备。

在本实验中,我们假设该设备为AB的1336F变频器,我们将利用RSLogix5000编程软件在ControlLogix处理器中创建一个项目,添加1336F变频器(带有1336-GM6 DeviceNet 通讯卡)并编辑简单的梯形图阶梯,通过组态DeviceNet网络来演示实际的控制过程。

实验主题:z创建一个ControlLogix项目z组态1336F变频器z观察RSLogix5000自动生成的对象数据模型z添加控制调节频率的梯形图逻辑z通过RSNetWorx For DeviceNet软件组态DeviceNet网络z PLC控制调节变频器频率请按步骤:一、创建工程1.打开RSLogix5000编程软件,点击File(文件)Æ New(新建),打开New Controller (新建控制器)画面。

如下图所示填写控制器的名称、描述(可选),选择控制器类型、版本和所在槽位(起始槽号从0开始),指定框架类型、工程保存目录等相关信息,然后按OK。

现在我们已经创建了一个ControlLogix项目。

此时我们还没有与项目相关的任何I/O模块,项目中也没有可执行的代码(如梯形图),你正在离线工作。

所作的任何改变都只限于软件中,并存储在计算机的硬盘驱动中。

在进入到在线操作以前,这些变化并不能反映到控制器中。

接下来是要确认我们想用在这个项目中的、插在本地背板上的模块。

在机架中,有如下设备:0号槽: 1756- ENBT 以太网通讯模块,IP地址为192.168.1.1084号槽: 1756-L1 Logix5550处理器模块5号槽: 1756-DNB DeviceNet网络通讯模块注意:所有模块都可带电插拔,如有需要可以另行配置其他模块。

2.添加本机架的DNB通讯模块。

同济大学 数据库 大作业

同济大学 数据库 大作业

┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊同济大学《数据库技术及应用》项目报告项目名称:医院一体化系统小组成员:1350871 倪荫豪1350870 李天扬年级:大二专业:土木工程指导教师:王睿智日期:2014 年12 月30 日┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 装 ┊ ┊ ┊ ┊ ┊ 订 ┊ ┊ ┊ ┊ ┊ 线 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊目录一、系统概述 (3)1.系统简介..................................................................3 2.功能特色 (3)二、需求分析 (3)1.系统功能需求分析......................................................3 2.数据库需求分析 (4)三、数据库设计 (4)1.概念模式设计............................................................4 2.逻辑模式设计............................................................6 3.物理数据库设计.........................................................6 4.触发器设计...............................................................11 5.存储过程设计 (13)四、系统设计和实现 (14)1.窗体类和功能类统计表................................................14 2.界面设计及其代码实现 (15)五、系统测试 (41)1.触发器测试用例.........................................................41 2.存储过程测试用例......................................................41 3.功能测试用例 (41)六、总结 (52)┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 装 ┊ ┊ ┊ ┊ ┊ 订 ┊ ┊ ┊ ┊ ┊ 线 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊一. 系统概述1.1系统简介当前医患关系、医院挂号等一直是社会热点问题。

matlab7.8错误总结

matlab7.8错误总结

一:matlab7.8中的simulink在‘找不到指定模块’下的打开方式:一:先到simulink下搜索子xxx.m文件并打开,比如打开get_simulink_errors.m当引子。

(必须每次都进行此步骤)二:再在命令窗口输入:simulink('open')。

虽然他汇报错,但是这种方法过一会儿就会打开。

由于在网上下载的有些matlab7.8资源问题(一般都是我们国家自己的盗版货)或者操作系统不兼容问题直接打开着会报‘找不到指定模块’错误.matlab7.8安装成功后找不到license file 而无法运行的问题一;在网上下载你需要的license file(按照如下安装要求下载)(file内容:lic_server.dat:# MATLAB license passcode file for use with FLEXlm.# LicenseNo: 161051 HostID: ANYDAEMON MLMUSE_SERVERINCREMENT MATLAB MLM 21 11-nov-2017 2011 30D070E03E0F158C8BDC DUP_GROUP=UH \SN=161051 TS_OKINCREMENT SIMULINK MLM 21 11-nov-2017 2011 607030B0BD8E74C1CE20 DUP_GROUP=UH \SN=161051 TS_OKINCREMENT Control_Toolbox MLM 21 11-nov-2017 2011 B0C05000DE03596BE0CD \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Identification_Toolbox MLM 21 11-nov-2017 2011 F060D0C09914D471493B \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Robust_Toolbox MLM 21 11-nov-2017 2011 E0D0E05062F43A27BDFC \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Optimization_Toolbox MLM 21 11-nov-2017 2011 2060A0503804BEF6CC59 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Spline_Toolbox MLM 21 11-nov-2017 2011 C090C0D070940139DFA3 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Signal_Toolbox MLM 21 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11-nov-2017 2011 C010C0F0C60B936DA2DD \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Fixed-Point_Blocks MLM 21 11-nov-2017 2011 8080E090E9CFF26662B1 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Compiler MLM 21 11-nov-2017 2011 70B090A031F3DF155156 DUP_GROUP=UH \SN=161051 TS_OKINCREMENT Financial_Toolbox MLM 21 11-nov-2017 2011 E09010A062C2622AF675 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT PDE_Toolbox MLM 21 11-nov-2017 2011 20F0401045C60A943198 DUP_GROUP=UH \SN=161051 TS_OKINCREMENT Wavelet_Toolbox MLM 21 11-nov-2017 2011 80A040F0773C7D766B88 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Communication_Toolbox MLM 21 11-nov-2017 2011 A0C020E0C5751820C9D7 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Stateflow MLM 21 11-nov-2017 2011 E090F0C041ECF73037F4 DUP_GROUP=UH \SN=161051 TS_OKINCREMENT Stateflow_Coder MLM 21 11-nov-2017 2011 F010A0E0C8DA086FDE80 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Power_System_Blocks MLM 21 11-nov-2017 2011 F0E0F020506CA56675A0 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Database_Toolbox MLM 21 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70A080C021B92B7F3FCB \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Link_for_ModelSim MLM 21 11-nov-2017 2011 A020*******F5504FA14 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Bioinformatics_Toolbox MLM 21 11-nov-2017 2011 20407040573AEB19550E \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Embedded_Target_c2000 MLM 21 11-nov-2017 2011 40E06080C6EB599EDC4C \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Simulink_Control_Design MLM 21 11-nov-2017 2011 802040E0450F3D08D203 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT RF_Toolbox MLM 21 11-nov-2017 2011 70F01030A01C38F1B05D DUP_GROUP=UH \SN=161051 TS_OKINCREMENT RF_Blockset MLM 21 11-nov-2017 2011 707050B0F2BE9CE2964A DUP_GROUP=UH \SN=161051 TS_OKINCREMENT Filter_Design_HDL_Coder MLM 21 11-nov-2017 2011 9050D050AD595402D9BB \DUP_GROUP=UH SN=161051 TS_OKINCREMENT OPC_Toolbox MLM 21 11-nov-2017 2011 009050C0FF4342B2ACC7 DUP_GROUP=UH \SN=161051 TS_OKINCREMENT GADS_Toolbox MLM 21 11-nov-2017 2011 4010200013300B3DED3F \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Fixed_Point_Toolbox MLM 21 11-nov-2017 2011 7040A0C00EECFECACF43 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT SL_Verification_Validation MLM 21 11-nov-2017 2011 \007010902F3A10B42E11 DUP_GROUP=UH SN=161051 TS_OK INCREMENT MATLAB_Distrib_Comp_Engine MLM 21 11-nov-2017 2011 \50109020EC05E3A1EDB7 DUP_GROUP=UH SN=161051 TS_OK INCREMENT SimDriveline MLM 21 11-nov-2017 2011 0000B0503F32F510EB28 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Video_and_Image_Blockset MLM 21 11-nov-2017 2011 B0E010E0A490497CD73C \DUP_GROUP=UH SN=161051 TS_OKINCREMENT MATLAB_Builder_for_Java MLM 21 11-nov-2017 2011 40A040D0AF00F059666F \DUP_GROUP=UH SN=161051 TS_OKINCREMENT SimEvents MLM 21 11-nov-2017 2011 7090B030DF75C75311DB DUP_GROUP=UH \SN=161051 TS_OKINCREMENT Simulink_HDL_Coder MLM 21 11-nov-2017 2011 A08050C0819E8542AB77 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT SimBiology MLM 21 11-nov-2017 2011 709030E082B5A397398B DUP_GROUP=UH \SN=161051 TS_OKINCREMENT Simscape MLM 21 11-nov-2017 2011 10C0B0F00279E252C0B2 DUP_GROUP=UH \SN=161051 TS_OKINCREMENT SimHydraulics MLM 21 11-nov-2017 2011 40D020F09FE57A877BD6 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT MATLAB_Builder_for_dot_Net MLM 21 11-nov-2017 2011 \D0E090B03E2BF9AB0AB8 DUP_GROUP=UH SN=161051 TS_OK INCREMENT Link_for_Tasking MLM 21 11-nov-2017 2011 909050E0004722C60B9F \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Aerospace_Toolbox MLM 21 11-nov-2017 2011 1060807091DEBA14386A \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Link_for_Incisive MLM 21 11-nov-2017 2011 F050F0304A374BE869B1 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Simulink_Design_Verifier MLM 21 11-nov-2017 2011 60100000BCCD62F69551 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Link_for_VisualDSP MLM 21 11-nov-2017 2011 F08080300CC1D5358638 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT IDE_Link_MU MLM 21 11-nov-2017 2011 50F0D0E0FC5D94008111 DUP_GROUP=UH \SN=161051 TS_OKINCREMENT SimElectronics MLM 21 11-nov-2017 2011 70E050E0568AC5F1BE06 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT EDA_Simulator_Link_DS MLM 21 11-nov-2017 2011 2090E0B0F7714FFBBBC9 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Econometrics_Toolbox MLM 21 11-nov-2017 2011 F0D0E0E0942EDFCC51D3 \DUP_GROUP=UH SN=161051 TS_OKINCREMENT Vehicle_Network_Toolbox MLM 21 11-nov-2017 2011 1000A00048EF61B74E8D \DUP_GROUP=UH SN=161051 TS_OK)we offer you two ways to license matlab r2009a:standalone1) choose "install manually without using the internet"2) enter the "file installation key"11111-11111-02011-442703) use "license_standalone.dat" when asked for license file network1) choose "install manually without using the internet"2) enter the "file installation key"11111-11111-02011-067173) if neccessary install "license manager"4) use "license_server.dat" when asked for license fileenjoy !找一个dat文本并创建副本,再用文本文档打开,将里面的内容全部删除,并将下载好的licensefile 文件内容复制到里面去(注意有两种licensefile:license_standalone.dat与license_server.dat,有些是两种一齐在一个文档中,只保留一种)。

同济大学c++ 实验1到实验8前三题

同济大学c++ 实验1到实验8前三题

实验4:1.#include “iostream.h”void main(){int n,sum=0;for(n=1;;sum+=n,n+=2)if(n>=20) break;cout<<”sum=”<<sum<<endl; }2.#include “iostream.h”void main(){int x;cout<<”input x:”<<endl; cin>>x;if(x==0)cout<<”0″;elsewhile(x!=0){cout<<x%10;x=x/10;}cout<<endl;}3.#include “iostream.h”void main(){int i,t=1;float s=0;for(i=1;1.0/t>1e-4;i++){s=s+1.0/t;t=t+i;}cout<<”s=”<<s<<endl;}4.#include “iostream.h”void main(){double pi=1,t=2;int n;for(n=1;t>1e-4;n++){pi=pi*t;t=(float)((2*n)*(2*n))/((2*n-1)*(2*n+1));}cout<<”pi=”<<pi<<endl; }5.(1)#include “iostream.h”#include “iomanip.h”void main(){int i,j;for(i=1;i<=9;i++){ cout<<setw(20-i);for(j=1;j<=2*i-1;j++) cout<<i;cout<<endl;}}5.(2)#include “iostream.h”#include “iomanip.h”void main(){int i,j;char c;for(i=9;i>=1;i–){ cout<<setw(9-i)<<”";c=9-i+’A';for(j=1;j<=2*i;j++)cout<<c;cout<<endl;}}6.#include “iostream.h”void main(){int m,m1,m2,m3;for(m=100;m<1000;m++){m1=m%10;m2=m/10%10;m3=m/100;if(m1*m1*m1+m2*m2*m2+m3*m3*m3==m) cout<<m<<”\t”;}}7.#include “iostream.h”#include “iomanip.h”void main(){int x,y,z,k=0;for(x=1;x<=6;x++)for(y=x+1;y<=6;y++)for(z=5;z<=6;z++)if(x<y&&y<z){ k++;cout<<x<<’\t’<<y<<’\t’<<z<<endl;}cout<<”满足条件的方案有:”<<k<<endl; }8.#include “iostream.h”#include “stdlib.h”#include “time.h”void main(){int a,n,i,k;double s=0,temp=0;srand(time(NULL));a=rand()%9+1;n=rand()%6+5;for(i=1;i<=n;i++){temp=temp*10+a;s=s+temp;}cout<<”s=”<<s<<endl;}9.#include “iostream.h”#include “math.h”void main(){float a,x,x1;cin>>a;x=a;do{x1=x;x=2.0/3*x+a/(3*x*x);}while(fabs(x-x1)>1e-5);cout<<”编程求得x=”<<x<<endl;cout<<”调用函数求得x=”<<pow(a,1.0/3)<<endl; }实验5:#include “stdlib.h”#include “iostream.h”void main(){int a[10],i,max,min;float ave;for(i=0;i<10;i++)a[i]=rand()%71+30;cout<<”数组a的内容如下:\n”;for(i=0;i<10;i++)cout<<a[i]<<’‘;cout<<endl;max=min=ave=a[0];for(i=1;i<10;i++){ave=ave+a[i];if(a[i]>max)max=a[i];if(a[i]<min)min=a[i];}cout<<”max=”<<max<<”,min=”<<min<<”,ave=”<<ave/10<<endl; }2. #include <iostream.h>#define N 20#include “stdlib.h”void main(){int a[N],i,j,k;cout<<”排序前:\n”;for(i=0;i<N;i++){a[i]=rand()%101;cout<<a[i]<<’‘;}for(i=0;i<N-1;i++){k=i;for(j=i+1;j<N;j++)if(a[j]>a[k])k=j;if(k!=i){int t=a[k]; a[k]=a[i]; a[i]=t;} }cout<<”排序后:\n”;for(i=0;i<N;i++)cout<<a[i]<<’‘;}3.#include “iostream.h”#include “stdlib.h”void main(){ int i,j,s[10],t,n;for(i=0;i<10;i++){s[i]=rand()%101;cout<<s[i]<<”“;}cout<<endl;cin>>n;for(j=0;j<n;j++){ t=s[9];for(i=8;i>=0;i–){s[i+1]=s[i];}s[0]=t;}for(i=0;i<10;i++)cout<<s[i]<<”“;}4.见第四章习题编程题1答案。

同济大学数值分析matlab编程

同济大学数值分析matlab编程

同济⼤学数值分析matlab编程MATLAB 编程题库1.下⾯的数据表近似地满⾜函数21cx bax y ++=,请适当变换成为线性最⼩⼆乘问题,编程求最好的系数c b a ,,,并在同⼀个图上画出所有数据和函数图像.625.0718.0801.0823.0802.0687.0606.0356.0995.0628.0544.0008.0213.0362.0586.0931.0ii y x ----解:>> x=[-0.931 -0.586 -0.362 -0.213 0.008 0.544 0.628 0.995]'; >> y=[0.356 0.606 0.687 0.802 0.823 0.801 0.718 0.625]'; >> A= [x ones(8,1) -x.^2.*y]; >> z=A\y;>> a=z(1); b=z(2); c=z(3); >>xh=[-1:0.1:1]';>>yh=(a.*xh+b)./(1+c.*xh.^2); >>plot(x,y,'r+',xh,yh,'b*')2.若在Matlab ⼯作⽬录下已经有如下两个函数⽂件,写⼀个割线法程序,求出这两个函数精度为1010-的近似根,并写出调⽤⽅式:>> edit gexianfa.mfunction [x iter]=gexianfa(f,x0,x1,tol) iter=0;x=x1;while(abs(feval(f,x))>tol) iter=iter+1;x=x1-feval(f,x1).*(x1-x0)./(feval(f,x1)-feval(f,x0)); x0=x1;x1=x; end>> edit f.m function v=f(x) v=x.*log(x)-1;>> edit g.m function z=g(y) z=y.^5+y-1;>> [x1 iter1]=gexianfa('f',1,3,1e-10) x1 =1.7632 iter1 = 6>> [x2 iter2]=gexianfa('g',0,1,1e-10) x2 =0.7549 iter2 = 83.使⽤GS 迭代求解下述线性代数⽅程组:123123123521242103103x x x x x x x x x ì++=--++=í???-+=??解:>> edit gsdiedai.mfunction [x iter]=gsdiedai(A,x0,b,tol) D=diag(diag(A)); L=D-tril(A); U=D-triu(A); iter=0; x=x0;>> A=[5 2 1;-1 4 2;1 -3 10]; >> b=[-12 10 3]'; >>tol=1e-4; >>x0=[0 0 0]';>> [x iter]=gsdiedai(A,x0,b,tol); >>x x =-3.0910 1.2372 0.9802 >>iter iter = 64.⽤四阶Range-kutta ⽅法求解下述常微分⽅程初值问题(取步长h=0.01),(1)2x dy y e xy dx y ì??=++?í??=??解:>> edit ksf2.mfunction v=ksf2(x,y)v=y+exp(x)+x.*y; >> a=1;b=2;h=0.01; >> n=(b-a)./h; >> x=[1:0.01:2]; >>y(1)=2;>>for i=2:(n+1)k1=h*ksf2(x(i-1),y(i-1));k2=h*ksf2(x(i-1)+0.5*h,y(i-1)+0.5*k1); k3=h*ksf2(x(i-1)+0.5*h,y(i-1)+0.5*k2); k4=h*ksf2(x(i-1)+h,y(i-1)+k3); y(i)=y(i-1)+(k1+2*k2+2*k3+k4)./6; end >>y调⽤函数⽅法>> edit Rangekutta.mfunction [x y]=Rangekutta(f,a,b,h,y0) x=[a:h:b]; n=(b-a)/h; y(1)=y0; for i=2:(n+1)k1=h*(feval(f,x(i-1),y(i-1)));k2=h*(feval(f,x(i-1)+0.5*h,y(i-1)+0.5*k1)); k3=h*(feval(f,x(i-1)+0.5*h,y(i-1)+0.5*k2)); k4=h*(feval(f,x(i-1)+h,y(i-1)+k3)); y(i)=y(i-1)+ (k1+2*k2+2*k3+k4)./6; end>> [x y]=Rangekutta('ksf2',1,2,0.01,2); >>y5.取0.2h =,请编写Matlab 程序,分别⽤欧拉⽅法、改进欧拉⽅法在12x ≤≤上求解初值问题。

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同济大学《数据库技术及应用》实验报告实验报告题目:建立与数据库的链接和基于绑定的数据库访问姓名:学号:年级:专业:指导教师:日期:2014 年11 月16 日一.实验目的1.掌握数据库访问模型的主要对象和功能2.掌握SQL和数据库的链接方法3.学习绑定对象的操作方法二.实验内容(实验题目+运行界面截图+实现代码)1.掌握前台和SqlServer后台的链接方法Imports System.Data.SqlClientPublic Class Form1Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load Dim myconn As New SqlConnection("database=university;data source=jd43\SQLEXPRESS; integrated security=true")Dim mysql As String = "select * from student"Dim myadapter As New SqlDataAdapter(mysql, myconn)Dim mydataset As New DataSetmyadapter.Fill(mydataset, "student")DataGridView1.DataSource = mydataset.Tables(0)End SubEnd Class2.在university上用完成如下界面Imports System.Data.SqlClientPublic Class Form2Private Sub Form2_Load(sender As Object, e As EventArgs) Handles MyBase.Load Dim myconn As New SqlConnection("database=university;data source=jd43\SQLEXPRESS; integrated security=true")Dim mysql As String= "select student.snum as '学号',sname as '姓名',count(secnum) as '选修课程门数',avg(score) as '平均成绩',sum(1-score/60) as '不及格门数' from student,sc where student.snum=sc.snum group by student.snum,sname"Dim myadapter As New SqlDataAdapter(mysql, myconn)Dim mydataset As New DataSetmyadapter.Fill(mydataset, "student")DataGridView1.DataSource = mydataset.Tables(0)End SubEnd Class3.建立university和student的浏览界面Imports System.Data.SqlClientPublic Class Form1Dim mybind As New BindingSourceDim mysql As String = "select * from student"Dim myconn As New SqlConnection("database=university;datasource=jd43\SQLEXPRESS;integrated security=true")Dim myadapter As New SqlDataAdapter(mysql, myconn)Dim mydataset As New DataSetPrivate Sub退出系统ToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles 退出系统ToolStripMenuItem.ClickEndEnd SubPrivate Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Loadmyadapter.Fill(mydataset, "student")mybind.DataSource = mydatasetmybind.DataMember = "student"TextBox1.DataBindings.Add(New Binding("text", mybind, "snum", True))TextBox2.DataBindings.Add(New Binding("text", mybind, "sname", True))TextBox3.DataBindings.Add(New Binding("text", mybind, "sex", True))TextBox4.DataBindings.Add(New Binding("text", mybind, "dept", True))TextBox5.DataBindings.Add(New Binding("text", mybind, "birthday", True))TextBox6.DataBindings.Add(New Binding("text", mybind, "telephone", True)) End SubPrivate Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.Click mybind.MoveFirst()End SubPrivate Sub Button5_Click(sender As Object, e As EventArgs) Handles Button5.Click mybind.MovePrevious()End SubPrivate Sub Button6_Click(sender As Object, e As EventArgs) Handles Button6.Click mybind.MoveNext()End SubPrivate Sub Button7_Click(sender As Object, e As EventArgs) Handles Button7.Click mybind.MoveLast()End SubPrivate Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click mybind.AddNew()End SubPrivate Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click mybind.RemoveCurrent()End SubPrivate Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click Me.Validate()mybind.EndEdit()Dim cm As New SqlCommandBuilder(myadapter)myadapter.Update(mydataset.Tables(0))End SubEnd Class4.完成学生成绩浏览功能的设计Imports System.Data.SqlClientPublic Class Form2Dim mybind As New BindingSourceDim mysql As String = "select * from shiyan8"Dim myconn As New SqlConnection("database=university;datasource=jd43\SQLEXPRESS;integrated security=true")Dim myadapter As New SqlDataAdapter(mysql, myconn)Dim mydataset As New DataSetPrivate Sub Form2_Load(sender As Object, e As EventArgs) Handles MyBase.Loadmyadapter.Fill(mydataset, "shiyan8")mybind.DataSource = mydatasetmybind.DataMember = "shiyan8"TextBox1.DataBindings.Add(New Binding("text", mybind, "snum", True))TextBox2.DataBindings.Add(New Binding("text", mybind, "sname", True))TextBox3.DataBindings.Add(New Binding("text", mybind, "cname", True))TextBox4.DataBindings.Add(New Binding("text", mybind, "score", True)) End SubPrivate Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click mybind.MoveFirst()End SubPrivate Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Clickmybind.MovePrevious()End SubPrivate Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Clickmybind.MoveNext()End SubPrivate Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.Clickmybind.MoveLast()End SubEnd Class三.实验体会或收获(有感而发,没有体会也可以不写)在用代码进行数据库的链接时发现data source后不能加(local),否则总是显示无法访问。

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