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📄 计算机科学论坛--同学编的c＃的fft函数拿出来共享.htm

📁 一个C#写的FFT函数
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123 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- saved from url=(0054)http://www.ieee.org.cn/dispbbs.asp?boardID=43&ID=11740 -->
<HTML><HEAD><TITLE>计算机科学论坛--同学编的C＃的FFT函数拿出来共享</TITLE>
<STYLE>#glowtext {
	FILTER: glow(color=red,strength=2); WIDTH: 100%
}
</STYLE>

<META http-equiv=Content-Type content="text/html; charset=gb2312">
<META lang=zh-cn content="中国XML论坛 - 专业的XML技术讨论区" name='description"'>
<META lang=zh-cn 
content="中国XML论坛,BBS.XML.ORG.CN,XML讨论区,可扩展标记语言,可扩展置标语言,Semantic Web, 语义Web, 语义网,万维网,语义,RDF,RDFS,RDF Schema,Schema,XML, XML Schema, XMLS, XForms, Ontology, OIL, DAML,OWL,Description Logic, DL,描述逻辑,W3C,World Wide Web, Web, WWW, computer, HTML, DOM,JAVA,PHP,JSP,ASP,.NET,DOT NET,C++,C#,VB,VBScript,Javascript, XQuery,XSL,XSLT,XLink,XPath,XPointer,URI,XHTML,SVG,CSS" 
name=keywords>
<META lang=zh-cn content="中国XML论坛 - 专业的XML技术讨论区" name='description"'><LINK 
title="中国XML论坛 - 专业的XML技术讨论区" href="http://www.ieee.org.cn/" type=text/html 
rel=start><LINK href="http://purl.org/dc" rel=schema.DC>
<META lang=zh-cn 
content="中国XML论坛,BBS.XML.ORG.CN,XML讨论区,可扩展标记语言,可扩展置标语言,Semantic Web, 语义Web, 语义网,万维网,语义,RDF,RDFS,RDF Schema,Schema,XML, XML Schema, XMLS, XForms, Ontology, OIL, DAML,OWL,Description Logic, DL,描述逻辑,W3C,World Wide Web, Web, WWW, computer, HTML, DOM, XQuery,XSL,XSLT,XLink,XPath,XPointer,URI,XHTML,SVG,CSS" 
name=DC.Subject xml:lang="zh-cn">
<META lang=zh-cn content=中国XML论坛(BBS.XML.ORG.CN) name=DC.Title xml:lang="zh-cn">
<META lang=zh-cn content="中国XML论坛 - 专业的XML技术讨论区" name=DC.Description.Abstract 
xml:lang="zh-cn">
<META content=2004-02-16 name=DC.Date.Created>
<META scheme=RFC1766 content=zh-cn name=DC.Language>
<META content="Collin Hsu" name=DC.Creator>
<META content=BBS.XML.ORG.CN name=DC.Publisher>
<META content=http://www.xml.org.cn name=DC.Rights>
<STYLE type=text/css>A:link {
	COLOR: #000000; TEXT-DECORATION: none
}
A:active {
	COLOR: #000000; TEXT-DECORATION: none
}
A:visited {
	COLOR: #000000; TEXT-DECORATION: none
}
A:hover {
	COLOR: #4455aa; TEXT-DECORATION: underline
}
BODY {
	SCROLLBAR-FACE-COLOR: #dee3e7; FONT-SIZE: 12px; SCROLLBAR-HIGHLIGHT-COLOR: #ffffff; SCROLLBAR-SHADOW-COLOR: #dee3e7; COLOR: #000000; SCROLLBAR-3DLIGHT-COLOR: #d1d7dc; SCROLLBAR-ARROW-COLOR: #006699; SCROLLBAR-TRACK-COLOR: #efefef; FONT-FAMILY: 宋体; SCROLLBAR-DARKSHADOW-COLOR: #98aab1; BACKGROUND-COLOR: #ffffff
}
TD {
	FONT-SIZE: 12px; LINE-HEIGHT: 15px; FONT-FAMILY: 宋体
}
TH {
	FONT-WEIGHT: bold; FONT-SIZE: 12px; BACKGROUND-IMAGE: url(skin/citye/a3.gif); COLOR: white; BACKGROUND-COLOR: #4455aa
}
TD.TableTitle2 {
	BACKGROUND-COLOR: #e4e8ef
}
TD.TableBody1 {
	BACKGROUND-COLOR: #ffffff
}
TD.TableBody2 {
	BACKGROUND-COLOR: #e4e8ef
}
TD.TopDarkNav {
	BACKGROUND-IMAGE: url(skin/citye/a12.gif)
}
TD.TopLighNav {
	BACKGROUND-IMAGE: url(skin/citye/a1.gif)
}
TD.TopLighNav1 {
	BACKGROUND-IMAGE: url(skin/citye/a2.gif)
}
TD.TopLighNav2 {
	BACKGROUND-COLOR: #ffffff
}
.tableBorder1 {
	BORDER-RIGHT: 1px; BORDER-TOP: 1px; BORDER-LEFT: 1px; WIDTH: 97%; BORDER-BOTTOM: 1px; BACKGROUND-COLOR: #6595d6
}
.tableBorder2 {
	BORDER-RIGHT: #dedede 1px solid; BORDER-TOP: #dedede 1px solid; BORDER-LEFT: #dedede 1px solid; WIDTH: 97%; BORDER-BOTTOM: #dedede 1px solid; BACKGROUND-COLOR: #efefef
}
#TableTitleLink A:link {
	COLOR: #ffffff; TEXT-DECORATION: none
}
#TableTitleLink A:visited {
	COLOR: #ffffff; TEXT-DECORATION: none
}
#TableTitleLink A:active {
	COLOR: #ffffff; TEXT-DECORATION: none
}
#TableTitleLink A:hover {
	COLOR: #ffffff; TEXT-DECORATION: underline
}
INPUT {
	FONT-SIZE: 12px; LINE-HEIGHT: 15px; FONT-FAMILY: Tahoma,Verdana,宋体
}
SELECT {
	FONT-SIZE: 12px; LINE-HEIGHT: 15px; FONT-FAMILY: Tahoma,Verdana,宋体
}
TEXTAREA {
	FONT-SIZE: 12px; LINE-HEIGHT: 15px; FONT-FAMILY: Tahoma,Verdana,宋体
}
.normalTextSmall {
	FONT-SIZE: 11px; COLOR: #000000; FONT-FAMILY: Verdana, Arial, Helvetica, sans-serif
}
A.contentlink:link {
	COLOR: #4455aa; TEXT-DECORATION: underline
}
A.contentlink:visited {
	COLOR: #000050; TEXT-DECORATION: underline
}
A.contentlink:active {
	COLOR: #ff6600; TEXT-DECORATION: underline
}
A.contentlink:hover {
	COLOR: #ff6600; TEXT-DECORATION: underline
}
</STYLE>

<SCRIPT language=javascript>
function submitonce(theform){
//if IE 4+ or NS 6+
if (document.all||document.getElementById){
//screen thru every element in the form, and hunt down "submit" and "reset"
for (i=0;i<theform.length;i++){
var tempobj=theform.elements[i]
if(tempobj.type.toLowerCase()=="submit"||tempobj.type.toLowerCase()=="reset")
//disable em
tempobj.disabled=true
}
}
}
function openScript(url, width, height){
	var Win = window.open(url,"openScript",'width=' + width + ',height=' + height + ',resizable=1,scrollbars=yes,menubar=no,status=yes' );
}
</SCRIPT>

<SCRIPT language=JavaScript>
//***********默认设置定义.*********************
tPopWait=50;//停留tWait豪秒后显示提示。
tPopShow=5000;//显示tShow豪秒后关闭提示
showPopStep=20;
popOpacity=99;

//***************内部变量定义*****************
sPop=null;
curShow=null;
tFadeOut=null;
tFadeIn=null;
tFadeWaiting=null;

document.write("<style type='text/css'id='defaultPopStyle'>");
document.write(".cPopText {  background-color: #F8F8F5;color:#000000; border: 1px #000000 solid;font-color: font-size: 12px; padding-right: 4px; padding-left: 4px; height: 20px; padding-top: 2px; padding-bottom: 2px; filter: Alpha(Opacity=0)}");
document.write("</style>");
document.write("<div id='dypopLayer' style='position:absolute;z-index:1000;' class='cPopText'></div>");


function showPopupText(){
var o=event.srcElement;
	MouseX=event.x;
	MouseY=event.y;
	if(o.alt!=null && o.alt!=""){o.dypop=o.alt;o.alt=""};
        if(o.title!=null && o.title!=""){o.dypop=o.title;o.title=""};
	if(o.dypop!=sPop) {
			sPop=o.dypop;
			clearTimeout(curShow);
			clearTimeout(tFadeOut);
			clearTimeout(tFadeIn);
123

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