<html>
<head>
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>Page 409</title>
</head>
<body>
<p><font color="white" size="0">
<!-- netLibrary.com Copyright Notice --></font></p>
<center>
<table cellPadding="0" width="100%" border="0">
<tr>
<td align="middle">
<table cellSpacing="0" cellPadding="2" width="100%" border="0">
<tr>
<td align="left"> </td>
<td align="right"> </td>
</tr>
</table>
</td>
</tr>
<tr>
<td align="left"><a name="{F45}">
<table cellSpacing="0" cellPadding="0" width="100%" border="0">
<tr>
<td align="right">
<font face="Times New Roman, Times, Serif" color="#ff0000" size="2">Page
409</font></td>
</tr>
</table>
</a><a name="{F46}">
<table cellSpacing="0" cellPadding="0" border="0">
<tr>
<td rowSpan="5"> </td>
<td colSpan="3" height="48"> </td>
<td rowSpan="5"> </td>
</tr>
<tr>
<td colSpan="3"> </td>
</tr>
<tr>
<td> </td>
<td><font face="Times New Roman, Times, Serif" size="4"><b>Hour 23<br>
The Mandelbrot Set</b></font></td>
<td> </td>
</tr>
<tr>
<td colSpan="3"> </td>
</tr>
<tr>
<td colSpan="3" height="1"></td>
</tr>
</table>
</a><a name="{F47}">
<table cellSpacing="0" cellPadding="0" border="0">
<tr>
<td rowSpan="5"> </td>
<td colSpan="3" height="12"></td>
<td width="19" rowSpan="5">
<img height="1" src="gfx/ab.gif" width="19" border="0"></td>
</tr>
<tr>
<td colSpan="3"> </td>
</tr>
<tr>
<td> </td>
<td><font face="Times New Roman, Times, Serif" size="2"><i>It is
difficult to include trees and coyotes in a bibliography.<br>
�</i>Georgia Johnson</font></td>
<td> </td>
</tr>
<tr>
<td colSpan="3"> </td>
</tr>
<tr>
<td colSpan="3" height="1"></td>
</tr>
</table>
</a><a name="{F48}">
<table cellSpacing="0" cellPadding="0" border="0">
<tr>
<td rowSpan="5"> </td>
<td colSpan="3" height="12"></td>
<td rowSpan="5"> </td>
</tr>
<tr>
<td colSpan="3"> </td>
</tr>
<tr>
<td> </td>
<td><font face="Times New Roman, Times, Serif" size="3">In the preceding
hour, we finished our discussion of Tk graphics and covered the geometry
managers available in Tkinter. In this hour, we apply everything we've
learned in the previous six hours to build a complete application that
allows the calculation and display of Mandelbrot sets and associated
Julia sets.</font></td>
<td> </td>
</tr>
<tr>
<td colSpan="3"> </td>
</tr>
<tr>
<td colSpan="3" height="1"></td>
</tr>
</table>
</a><a name="{F49}">
<table cellSpacing="0" cellPadding="0" border="0">
<tr>
<td rowSpan="5"> </td>
<td colSpan="3" height="17"></td>
<td rowSpan="5"> </td>
</tr>
<tr>
<td colSpan="3"> </td>
</tr>
<tr>
<td> </td>
<td><font face="Times New Roman, Times, Serif" size="3"><b>The
Mandelbrot Set</b></font></td>
<td> </td>
</tr>
<tr>
<td colSpan="3"> </td>
</tr>
<tr>
<td colSpan="3" height="1"></td>
</tr>
</table>
</a><a name="{F4A}">
<table cellSpacing="0" cellPadding="0" border="0">
<tr>
<td rowSpan="5"> </td>
<td colSpan="3" height="12"></td>
<td rowSpan="5"> </td>
</tr>
<tr>
<td colSpan="3"> </td>
</tr>
<tr>
<td> </td>
<td><font face="Times New Roman, Times, Serif" size="3">In 1985, the
August <i>Scientific American</i> arrived; many of the engineers where I
worked came in the next morning with some simple Mandelbrot programs,
and by the end of the week nearly everyone had her own program. By
Monday, there was a noticeable sluggishness when trying to get any real
work done on any of the seven company computers (two Vaxen and five
Goulds), caused by the number of Mandelbrot calculations running
simultaneously.</font><font face="Times New Roman, Times, Serif" color="#ffff00" size="3"><!-- break --></font></td>
<td> </td>
</tr>
<tr>
<td colSpan="3"> </td>
</tr>
<tr>
<td colSpan="3" height="1"></td>
</tr>
</table>
</a><a name="{F4B}">
<p> </a></td>
</tr>
</table>
<p><font color="white" size="0"></p>
</center>
<p><a name="bottom"> </a>
<!-- netLibrary.com Copyright Notice --></font></p>
<p> </p>
<center>
<table cellPadding="0" width="100%" border="0">
<tr>
<td align="middle">
<table cellSpacing="0" cellPadding="2" width="100%" border="0">
<tr>
<td align="left"> </td>
<td align="right"> </td>
</tr>
</table>
</td>
</tr>
<tr>
<td align="left"><a name="{F4C}">
<table cellSpacing="0" cellPadding="0" width="100%" border="0">
<tr>
<td align="right">
<font face="Times New Roman, Times, Serif" color="#ff0000" size="2">Page
410</font></td>
</tr>
</table>
</a><a name="{F4D}">
<table cellSpacing="0" cellPadding="0" border="0">
<tr>
<td rowSpan="5"> </td>
<td colSpan="3" height="12"></td>
<td rowSpan="5"> </td>
</tr>
<tr>
<td colSpan="3"> </td>
</tr>
<tr>
<td> </td>
<td><font face="Times New Roman, Times, Serif" size="3">This scenario
was probably repeated all over the country, although I think our site
had a larger proportion of engineers than most others. At the time, the
best graphics machine I could get my hands on was an Intelecolor
terminal, restricted to downloading at 9600 baud. Even though it took
only five minutes to compute a Mandelbrot on our fastest machine (a
now-extinct Gould NP1), it could take hours to download the resulting
graphic to the display. It was agonizing, and the tube had only eight
colors, anyway. I tried to get the company to spring for an Ethernet
card for my terminal, but my boss said ''No way! I know what you want it
for!" And I could hardly argue with him.</font></td>
<td> </td>
</tr>
<tr>
<td colSpan="3"> </td>
</tr>
<tr>
<td colSpan="3" height="1"></td>
</tr>
</table>
</a><a name="{F4E}">
<table cellSpacing="0" cellPadding="0" border="0">
<tr>
<td rowSpan="5"> </td>
<td colSpan="3" height="12"></td>
<td rowSpan="5"> </td>
</tr>
<tr>
<td colSpan="3"> </td>
</tr>
<tr>
<td> </td>
<td><font face="Times New Roman, Times, Serif" size="3">I suspect that
for the first few months after the appearance of that <i>Scientific
American</i> issue, 90% to 95% of our national computing capability was
dedicated to the production of Mandelbrot Set graphics. Now you, too,
although belatedly, can contribute.</font></td>
<td> </td>
</tr>
<tr>
Teach Yourself Python In 24 Hours(英文)
需积分: 13 155 浏览量
2008-08-20
23:22:34
上传
评论
收藏 2.35MB RAR 举报
Teach Yourself Python In 24 Hours(英文) （189个子文件） 
M-01.GIF 58KB 312-01.GIF 9KB 375-01.GIF 8KB 341-01.GIF 7KB 298-01.GIF 6KB 400-01.GIF 5KB 352-02.GIF 4KB 315-01.GIF 4KB 033-01.GIF 4KB 355-01.GIF 4KB 314-01.GIF 4KB 310-02.GIF 4KB 324-01.GIF 3KB 313-01.GIF 3KB 310-01.GIF 3KB 307-01.GIF 3KB 311-01.GIF 3KB 349-01.GIF 3KB 431-02.GIF 3KB 308-01.GIF 3KB 354-03.GIF 2KB 304-01.GIF 2KB 320-03.GIF 2KB 404-01.GIF 2KB ams.GIF 2KB 412-01.GIF 2KB 403-01.GIF 2KB 354-02.GIF 2KB 337-01.GIF 2KB 324-02.GIF 2KB 354-01.GIF 2KB 402-01.GIF 2KB 306-01.GIF 1KB 299-01.GIF 1KB 300-01.GIF 1KB 320-01.GIF 1KB 320-02.GIF 1KB 376-01.GIF 981B 301-02.GIF 904B 325-01.GIF 865B 301-01.GIF 852B ook.GIF 778B 322-02.GIF 684B 322-01.GIF 626B 302-01.GIF 571B 302-02.GIF 551B ulb.GIF 479B 303-01.GIF 433B 0043-01.GIF 208B ab.gif 89B
Ch23.htm 281KB Ch16.htm 262KB Ch6.htm 260KB Ch22.htm 241KB Ch8.htm 227KB Ch20.htm 216KB Ch18.htm 187KB Ch13.htm 181KB Ch21.htm 174KB Ch4.htm 170KB Ch11.htm 163KB Ch14.htm 159KB Ch3.htm 156KB Ch10.htm 145KB Ch19.htm 136KB Ch12.htm 128KB Ch7.htm 127KB Ch5.htm 126KB Ch9.htm 119KB Ch17.htm 114KB Ch2.htm 110KB Ch15.htm 106KB Ch24.htm 106KB Ch1.htm 100KB Contents.htm 74KB AppendixD.htm 69KB AppendixC.htm 43KB AppendixB.htm 33KB AppendixA.htm 25KB AppendixE.htm 24KB
062-02.JPG 30KB 062-01.JPG 30KB 431-03.JPG 28KB 053-02.JPG 28KB 326-01.JPG 28KB 431-01.JPG 27KB 245-01.JPG 26KB 332-01.JPG 26KB 085-02.JPG 23KB 435-01.JPG 23KB 450-01.JPG 23KB 450-02.JPG 23KB 035-02.JPG 22KB 432-01.JPG 22KB 232-01.JPG 22KB 053-01.JPG 22KB 468-01.JPG 21KB 089-01.JPG 21KB 034-01.JPG 21KB 056-01.JPG 21KB共 189 条
- 1
- 2
资源评论
