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Date: Fri, 21 Jun 2002 20:46:31 +0900
Message-ID: <ybsy9d86ei0.wl@ett.sat.t.u-tokyo.ac.jp>
From: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp>
To: FreeBSD-users-jp@jp.FreeBSD.org
In-Reply-To: <200206211003.TAA06401@pon.nintendo.co.jp>
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At Fri, 21 Jun 2002 19:03:21 +0900,
Takashi SHIRAI wrote:
> $B!!(Brand(3) $B$OO@30$H$7$F!"(BN $B$,>.$5$$$&$A$O$I$NMp?t$b%]%"%=%sJ,(B
> $BI[$K=>$C$F$$$k$3$H$,H=$k$H;W$$$^$9!#FC$KM-0U$J:90[$O8+Ev$?$j(B
> $B$^$;$s!#(B
> $B!!$H$3$m$,!"(BN $B$rBg$-$/$7$F$$$/$H(B lrand48(3) $B$@$1$,%]%"%=%sJ,(B
> $BI[$N4|BTCM$h$j$b>.$5$JI8=`JP:9CM$r=P$7;O$a$kLu$G$9!#$3$N$3$H(B
> $B$O(B 1 $B2/2s$N;n9T;~$K1w$$$F82Cx$KI=$l$F$$$k$H;W$$$^$9!#(B
> $B!!(B1000 $BK|2s$NCM$rNc<($7$?$N$O!"$3$N:90[$,I=$l$J$$DxEY$NJl=8(B
> $BCD$r<($7$?$N$G$O0UL#$,L5$$$H;W$C$?$+$i$G!"$=$N7k2L(B lrand48(3)
> $B$@$1$,%]%"%=%sJ,I[$K=>$o$J$$7k2L$H$J$C$F$7$^$$$^$7$?$,!"$3$l(B
> $B$OMp?t$H$7$F$NIJ<A$,0-$$$3$H$r<($7$F$$$k$s$G$7$g$&$+!)(B
> $B!!(BN $B$,==J,Bg$-$1$l$PI8=`JP:9$O(B 0 $B$K6a$E$$$F$$$/Lu$G!"0lHLO@(B
> $B$H$7$F$=$N!V==J,Bg$-$$!W$H$$$&ogCM$,$I$NJU$j$K$"$k$N$+;d$K$O(B
> $BH=CG=PMh$J$$$N$G$9$,!"$3$N(B lrand48(3) $B$N7k2L$K1w$$$F$O!V(BN $B$,(B
> $B==J,$KBg$-$$!W$H;d$O;W$C$?$N$G$9$,!#(B
> 
> $B!!$=$l$H$b!"$3$l$O(B lrand48(3) $B$N<~4|$,B>$HHf$Y$FC;$$$?$a$K!"(B
> N $B$,Bg$-$/$J$k$H(B rand(3) $B$N$h$&$JIT<+A3$J0lMMJ,I[$r<($7$F$7(B
> $B$^$C$?7k2L$J$s$G$7$g$&$+!)(B

$B$O$$(B, $B<~4|$h$j$bD9$$(B data $B$r=PNO$5$;$?$?$a$@$H;W$$$^$9(B.

$B$3$3$G5DO@$5$l$F$$$kA1$70-$7$O(B, $B0lMM@-$H$$$&$h$j$OFHN)@-(B
$B$@$H;W$$$^$9(B.
$B6KC<$JNc$G$9$,(B, 0 $B$+$i(B 255 $B$r7+$jJV$97ONs$O(B, $B0lMM$G$9$,(B, $BFHN)$G$O(B
$B$"$j$^$;$s(B($B<!$K$J$K$,$/$k$+$o$+$j$^$9$+$i(B)

$B$5$FGr0f$5$s$,Dj5A$5$l$?(B,

$B!!(BS[n] = { 256 $BLLBN%5%$%3%m$NL\(B n $B$,=P$?2s?t(B } $B$HDj5A$7$F!"(B
	M = $B&2(B(S[n]) / 256
	V = $B&2(B((S[n] - M)^2) / 256
	SD = $B"e(BV

$B$3$NI8=`JP:9$G$9$,(B, N $B$rA}$d$7$F$b(B 0 $B$K$O9T$-$^$;$s(B.
$BBg?t$NK!B'$G9M$($k$N$O(B S[n]/N($BJ?6Q(B) -> 1/256($B4|BTCM(B) $B$N$h$&$J<}B+$G$9(B.

$B$D$^$j(B, S[n]/N $B$O(B N $B$,==J,Bg$-$$$H$-$K(B, 1/256 $B$N(B
$B2s$j$KJ,I[$7(B, $BCf?46K8BDjM}$,65$($k$H$3$m$K$h$k$H(B,
$BFHN)$J>l9g$K$O(B, $B$=$NI8=`JP:9(B(=SD/N)$B$O(B
1/sqrt(N) $B$N%*!<%@$G>.$5$/$J$C$F$$$-$^$9(B.
$B$D$^$j(B, $B>e$N(B SD $B$@$H(B sqrt(N) $B$N%*!<%@$GBg$-$/$J$C$F$$$-$^$9(B.
$B$3$l$O(B, $BGr0f$5$s$N%G!<%?$N(B SD/sqrt(N) $B$r7W;;$9$l$P(B, $B$[$\0lDj$G$"$k$3$H(B
$B$+$iMF0W$K3N$+$a$k$3$H$,$G$-$^$9(B.

$B0lJ}FHN)$G$O$J$/<~4|E*$J>l9g$G$9$,(B, N $B$,<~4|$h$j$b==J,Bg$-$$>l9g$K$O(B,
$B>e$N6KC<$JNc$G9M$($k$H(B, $B$@$$$?$$(B SD/N $B$N%*!<%@$O(B 1/N $B$K(B
$B$J$j$^$9(B($B$D$^$j(B SD $B$O(B $B%*!<%@(B 1). $B$3$l$O(B rand(3) $B$N(B SD
$B$NCM$,$[$\(B N $B$K$h$i$J$$$3$H$H0lCW$7$^$9(B.

$BJ,;6$NI>2A$@$1$J$i(B, $BFs9`J,I[$r$=$N$^$^;H$C$F(B,
$B%]%o%=%sJ,I[$d(B, $B@55,J,I[6a;w$9$kI,MW$O$J$$$H;W$$$^$9(B.
$B8!Dj$9$k$J$i(B, $BAGD>$K@55,J,I[6a;w$G$7$g$&$+(B.

/\ Hidetoshi Shimokawa
\/  simokawa@sat.t.u-tokyo.ac.jp
PGP public key: http://www.sat.t.u-tokyo.ac.jp/~simokawa/pgp.html
