translation updated for signal_processing.
[scilab.git] / scilab / modules / signal_processing / help / ja_JP / filters / ell1mag.xml
1 <?xml version="1.0" encoding="UTF-8"?>
2
3 <refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:svg="http://www.w3.org/2000/svg" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:db="http://docbook.org/ns/docbook" xmlns:scilab="http://www.scilab.org" xml:lang="ja" xml:id="ell1mag">
4     
5     <refnamediv>
6         
7         <refname>ell1mag</refname>
8         
9         <refpurpose>楕円フィルタの振幅</refpurpose>
10         
11     </refnamediv>
12     
13     <refsynopsisdiv>
14         
15         <title>呼び出し手順</title>
16         
17         <synopsis>[v]=ell1mag(eps,m1,z)</synopsis>
18         
19     </refsynopsisdiv>
20     
21     <refsection>
22         
23         <title>引数</title>
24         
25         <variablelist>
26             
27             <varlistentry>
28                 
29                 <term>eps</term>
30                 
31                 <listitem>
32                     
33                     <para>
34                         
35                         通過域のリップル=<literal>1/(1+eps^2)</literal>
36                         
37                     </para>
38                     
39                 </listitem>
40                 
41             </varlistentry>
42             
43             <varlistentry>
44                 
45                 <term>m1</term>
46                 
47                 <listitem>
48                     
49                     <para>
50                         
51                         阻止域のリップル=<literal>1/(1+(eps^2)/m1)</literal>
52                         
53                     </para>
54                     
55                 </listitem>
56                 
57             </varlistentry>
58             
59             <varlistentry>
60                 
61                 <term>z</term>
62                 
63                 <listitem>
64                     
65                     <para>複素平面上の標本ベクトルの値</para>
66                     
67                 </listitem>
68                 
69             </varlistentry>
70             
71             <varlistentry>
72                 
73                 <term>v</term>
74                 
75                 <listitem>
76                     
77                     <para>標本点における楕円フィルタの値</para>
78                     
79                 </listitem>
80                 
81             </varlistentry>
82             
83         </variablelist>
84         
85     </refsection>
86     
87     <refsection>
88         
89         <title>説明</title>
90         
91         <para>
92             
93             楕円フィルタの二乗振幅を得る際に使用される関数.
94             
95             通常は,<literal>m1=eps*eps/(a*a-1)</literal>です. 
96             
97             <literal>s=%sn(z,m1)</literal>として,
98             
99             <literal>v=real(ones(z)./(ones(z)+eps*eps*s.*s))</literal>を返します.
100             
101         </para>
102         
103     </refsection>
104     
105     <refsection>
106         
107         <title>例</title>
108         
109         <programlisting role="example"><![CDATA[ 
110 deff('[alpha,BeTa]=alpha_beta(n,m,m1)',...
111 'if 2*int(n/2)==n then, BeTa=K1; else, BeTa=0;end;...
112 alpha=%k(1-m1)/%k(1-m);')
113 epsilon=0.1;A=10;  //リップルパラメータ
114 m1=(epsilon*epsilon)/(A*A-1);n=5;omegac=6;
115 m=find_freq(epsilon,A,n);omegar = omegac/sqrt(m)
116 %k(1-m1)*%k(m)/(%k(m1)*%k(1-m))-n   //チェック...
117 [alpha,Beta]=alpha_beta(n,m,m1)
118 alpha*delip(1,sqrt(m))-n*%k(m1)      //チェック
119 sample=0:0.01:20;
120 //等高線に正の実軸をマップ...
121 z=alpha*delip(sample/omegac,sqrt(m))+Beta*ones(sample);
122 plot(sample,ell1mag(epsilon,m1,z))
123  ]]></programlisting>
124         
125         <scilab:image><![CDATA[
126 deff('[alpha,BeTa]=alpha_beta(n,m,m1)',...
127 'if 2*int(n/2)==n then, BeTa=K1; else, BeTa=0;end;...
128 alpha=%k(1-m1)/%k(1-m);')
129 epsilon=0.1;A=10;  //ripple parameters
130 m1=(epsilon*epsilon)/(A*A-1);n=5;omegac=6;
131 m=find_freq(epsilon,A,n);omegar = omegac/sqrt(m)
132 %k(1-m1)*%k(m)/(%k(m1)*%k(1-m))-n   //Check...
133 [alpha,Beta]=alpha_beta(n,m,m1)
134 alpha*delip(1,sqrt(m))-n*%k(m1)      //Check
135 samples=0:0.01:20;
136 //Now we map the positive real axis into the contour...
137 z=alpha*delip(samples/omegac,sqrt(m))+Beta*ones(samples);
138 plot(samples,ell1mag(epsilon,m1,z))
139 ]]>     </scilab:image>
140         
141     </refsection>
142     
143     <refsection role="see also">
144         
145         <title>参照</title>
146         
147         <simplelist type="inline">
148             
149             <member>
150                 
151                 <link linkend="buttmag">buttmag</link>
152                 
153             </member>
154             
155         </simplelist>
156         
157     </refsection>
158     
159 </refentry>
160