数学建模社区-数学中国

标题: [讨论]求一个积分 [打印本页]

作者: liwenhui 时间: 2007-11-17 12:59
标题: [讨论]求一个积分

鄙人在某论坛上见到一道积分题

输入maltab后运行了近15分钟也没有算出答案。

揣测是自己的笔记本配置偏低。

故放在论坛上面来请大家都看看

希望有高性能计算机者（512M以上内存,主频2.0MHz以上），

请把下面的代码输入matlab命令窗口中执行，

运算出结果后请把结果放上面来交流。

谢谢!

matlab代码如下：

syms x z a r;

y=x/((1-x^2)^5*(1+r-2*r^5*cos(z*x+a)));

int(y)

作者: madio 时间: 2007-11-18 00:26

我计算了15分钟，有错误提示！

------------------------------------------------------------------------
Segmentation violation detected at Sun Nov 18 00:16:46 2007
------------------------------------------------------------------------

Configuration:
MATLAB Version: 7.4.0.287 (R2007a)
MATLAB License: 161051
Operating System: Microsoft Windows XP
Window System: Version 5.1 (Build 2600: Service Pack 2)
Processor ID: x86 Family 6 Model 15 Stepping 2, GenuineIntel
Virtual Machine: Java 1.5.0_07 with Sun Microsystems Inc. Java HotSpot(TM) Client VM mixed mode
Default Charset: GBK

Register State:
EAX = 84000000 EBX = 00000045
ECX = 0bdd3060 EDX = 00000001
ESI = 00000027 EDI = 21814554
EBP = 1e2614e4 ESP = 00c9ec30
EIP = 18a1f439 FLG = 00010287

Stack Trace:
[0] maple.dll:0x18a1f439(0x84000000, 0x94000002, 0x0c6b806c, 0x84000000)
[1] 0x0bdd9e30

This error was detected while a MEX-file was running. If the MEX-file
is not an official MathWorks function, please examine its source code
for errors. Please consult the External Interfaces Guide for information
on debugging MEX-files.

If it is an official MathWorks function, please
follow these steps to report this problem to The MathWorks so we
have the best chance of correcting it:

The next time MATLAB is launched under typical usage, a dialog box will
open to help you send the error log to The MathWorks. Alternatively, you
can send an e-mail to segv@mathworks.com with the following file attached:
C:\DOCUME~1\USER\LOCALS~1\Temp\matlab_crash_dump.1776

If the problem is reproducible, please submit a Service Request via:
http://www.mathworks.com/support/contact_us/ts/help_request_1.html

A technical support engineer might contact you with further information.

Thank you for your help. Save your workspace and restart MATLAB.

Error in ==> maple at 113
[result,status] = maplemex(statement);

Error in ==> sym.maple at 85
[result,status] = maple(statement);

Error in ==> sym.int at 39
r = reshape(maple('map','int',f(,x),size(f));

??? Error using ==> sym.double at 25
DOUBLE cannot convert the input expression into a double array.
If the input expression contains a symbolic variable, use the VPA function instead.

Error in ==> sym.mpower at 21
if ~isempty(findsym(p)) | p ~= fix(double(p))

作者: 摔锅 时间: 2007-11-18 20:18
我的直接卡住了

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