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Cc: tomoaki@nibb.ac.jp
From: Tomoaki NISHIYAMA <tomoaki@nibb.ac.jp>
In-Reply-To: <200206200412.NAA07446@pon.nintendo.co.jp>
References: <20020619.195908.71080343.oishi@sra.co.jp>
	<200206200412.NAA07446@pon.nintendo.co.jp>
	<20020620.130838.63130164.okuyamak@dd.iij4u.or.jp>
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Subject: [FreeBSD-users-jp 69447] Re: [info] Updated FreeBSD QandA
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From: Takashi SHIRAI <shirai@nintendo.co.jp>
Subject: [FreeBSD-users-jp 69444] Re: [info] Updated FreeBSD QandA
Date: Thu, 20 Jun 2002 13:12:30 +0900
Message-ID: <200206200412.NAA07446@pon.nintendo.co.jp>

shirai> $B!!$^$?!"$P$i$D$-$bHf3S$7$F$_$^$7$?!#8x@5$KHf3S$9$k$?$a4:$($F(B
shirai> $BMp?tCM$N(B 256 $B$K$h$k>jM>(B (rand % 256) $B$r<h$C$F!"(B1000 $BK|2s$N;n(B
shirai> $B9T$KBP$9$k3FMp?tCMH/@82s?t$NI8=`JP:9$r7W;;$7$F$_$^$7$?!#(B
shirai> $B!!$=$l$>$l!":8$NCM$OC1=c$KFHN);v>]$H$7$F8+$J$7$?>l9g$NCM$G!"(B
shirai> $B1&$NCM$O(B 256 x 256 $B$N(B matrix $B$r:n@.$7$FD>A0$NMp?tCM$KB3$/CM(B
shirai> $B$,$I$&J,I[$9$k$+$r7WB,$7$?>l9g$NCM$G$9!#(B
shirai> $B!!$D$^$j!"A0<T$,>.$5$1$l$P>.$5$$$[$I$P$i$D$-$NBg$-$$Mp?t$G$"(B
shirai> $B$j!"8e<T$,>.$5$1$l$P>.$5$$$[$ID>A0$NMp?tCM$X$N0MB8EY$N>.$5$$(B
shirai> $BMp?t$G$"$k$3$H$r<($7$^$9!#(B

$B$3$3$O9M$(J}$,JQ$G$9!"A0<T$O(B1/256$B$N3NN($G5/$-$k;v>]$r(B1000$BK|2s(B
$B;n9T$7$?$H$-$K5/$-$k2s?t$N$P$i$D$-$r9M$($k$N$G$9$+$i!"(B
2$B9`J,I[$r9M$($k$N$G$9$,!"%]%"%=%sJ,I[$G6a;w$9$k$b$N$H$7$F!"(B
$B$R$H$D$N?tJU$j$N=P8=?t$O(B1000 0000 / 256 = 39062.5$B$J$N$G(B
sqrt(39062.5) = 197.6$BA08e$NI8=`JP:9$,=P$k$N$,%i%s%@%`@-$N(B
$B9b$$Mp?t$G$9!#(B

$BF1MM$K8e<T$O!"(Bsqrt(1000 0000 / (256 * 256))=12.4$BA08e(B
$B$,4|BT$5$l$k$O$:$G$9!#(B

shirai> 	rand(3):	  0.499985	2436.632969
shirai> 	random(3):	187.640198	  12.340895
shirai> 	lrand48(3):	163.742056	  10.389970
shirai> 	arc4random(3):	188.478488	  12.376886
shirai> 
shirai> $B!!$3$l$i$rAm9g$7$FH=CG$9$k$H!"0J2<$N$h$&$J$3$H$,8@$($k$H;W$$(B
shirai> $B$^$9!#(B
shirai> rand(3):	$B<~4|@-$K4X$7$F$O:G0-$GMp?t$H$7$F$O$H$F$b;H$((B
shirai> 		$B$?$b$N$G$O$J$$$,!"5U$K$=$N<~4|@-$N$?$a$K6KC<(B
shirai> 		$B$KBg$-$J$P$i$D$-$,F@$i$l$k!#(B
shirai> random(3):	$B7W;;NL$O(B rand(3) $B$HBg:9$J$$3d$K$ODx$[$I$N$P(B
shirai> 		$B$i$D$-$,F@$i$l$k!#(B
shirai> lrand48(3):	$B$P$i$D$-$K4X$7$F$OM%=($@$,!"$=$l$rF@$k$?$a$N(B
shirai> 		$B7W;;NL$,B?2a$.$k!#(B
shirai> arc4random(3):	random(3) $B$HF1DxEY$N$P$i$D$-$7$+F@$i$l$J$$3d(B
shirai> 		$B$K$O7W;;NL$,B?$$!#(B
shirai> $B!!$H$$$&$3$H$G!"(Bsimulation $B$N$h$&$KE}7WE*$KMp?t$rMQ$$$k>l9g(B
shirai> $B$K1w$$$F$O!"7W;;NL$h$jIJ<AM%@h$N>l9g$O(B lrand48(3) $B$r!"IJ<A$h(B
shirai> $B$j7W;;NLM%@h$N>l9g$O(B random(3) $B$r;H$(!"$H$$$&7kO@$K$J$k$N$G(B
shirai> $B$O$J$$$G$7$g$&$+!#(B

$B$H$$$&$3$H$G!"(Blrand48()$B$,M%=($H$O8@$$$,$?$$$H$*$b$$$^$9!#(B
$B$@$$$?$$(B2^n$B$rK!$H$9$k@~7A9gF1K!$O4pK\E*$KNI$/$J$5$=$&$J$N$G(B
random()$B$r;H$&$N$,$*<j7ZMQES$K$O$$$$$N$G$O$J$$$G$7$g$&$+!#(B

shirai> 	arc4random()$B2~(B:	199.112131	  12.384926
$B$5$9$,$K$3$l$,0lHV@.@S$,$h$$$G$9$M!#%3%9%H$KFq$,$"$k$G$7$g$&$1$I!#(B

simulation$B$J$I$N8&5fMQ$K$O%7%9%F%`ImB0$N$r;H$o$J$$$G!"(B
MT$B$[$+2?<oN`$+$r;n$9$N$,K>$^$7$$$G$7$g$&!#(B

shirai>    $B$^$?!"7W;;NLEy$N>r7o$K$h$j!"H]1~L5$/IJ<A$N0-$$Mp?t$r;H$o$6$k(B
shirai>    $B$rF@$J$$$h$&$J>l9g$K$O!"F@$i$l$?Mp?tCM$r:F2C9)$r;\$7$?>e$GMx(B
shirai>    $BMQ$9$k$3$H$G!"$"$kDxEY$O<A$r>e$2$k$3$H$,=PMh$k$G$7$g$&!#(B
shirai>    $B:F2C9)$NNc$H$7$F$O0J2<$N$h$&$J<jCJ$,$"$j$^$9!#(B
$B:F2C9)$K$b%3%9%H$,$+$+$k$N$G!"IJ<A$K2fK}$G$-$J$$>l9g$O%7%9%F%`ImB0$G$J$$(B
$B$b$N$r;H$&J}$,$$$$$G$9!#(B

shirai> 	a.$B2<0L?t(B bits $B$O<~4|@-$,Hf3SE*Bg$-$$$N$G<N$F$k!#(B
$B2<0L(B bits$B$@$10-$$$N$O!"(B2^n$B$rK!$H$9$k@~7A9gF1K!$N>l9g$@$1$G$9!#(B
$B<N$F$k$h$j$O(Bb$B$NJ}$,$$$$$G$7$g$&!#(B

shirai> 	b.$BMp?tCM$rBg$-$JAG?t$G3d$C$?>&Kt$O>jM>$rMQ$$$k!#(B
$B$3$l$r$d$C$F$b!"A4BN$N<~4|$,1d$S$k$o$1$G$O$J$$$7!"(B
$BCm0U$7$J$$$H0lMM@-$rB;$J$&4m81$,$"$j$^$9!#(B

shirai> 	c.$BMp?t$rM>7W$K2?2s$+H/@8$5$;;H$o$:$K<N$F$k!#(B
$B2?G\$b7W;;$9$k$s$J$i$b$C$H$^$7$JMp?t$r;H$($k$G$7$g$&!#(B

$B0J2<$O(Brand()$B$K$D$$$FJdB-$G$9!#(B

From: Kenichi Okuyama <okuyamak@dd.iij4u.or.jp>
Subject: [FreeBSD-users-jp 69445] Re: [info] Updated FreeBSD QandA
Date: Thu, 20 Jun 2002 13:08:38 +0900 (JST)
Message-ID: <20020620.130838.63130164.okuyamak@dd.iij4u.or.jp>

okuyamak> $B1|;3$G$9!#(B
okuyamak> 
okuyamak> TN> $B$^$?!"(BSunOS 4.1$B$N(Bman page$B$G$O(Brand() $B$O(B 0$B$+$i(B(2**31)-1$B$NCM$rJV$9$3$H$,(B
okuyamak> TN> $B5,Dj$5$l$F$$$^$9$+$i!"$3$l$O3d$C$F$$$J$$$N$G$7$g$&!#(B
okuyamak> 
okuyamak> 64bit $B@0?t$rFbItJQ?t$KMQ$$$F(B ( inner >> 16 )&0xffffffff $B$r(B
okuyamak> $B$d$l$P!"0l1~(B 32bit $B$NCM$KBP1~$7$^$9$N$G!"I,$:$7$b!V3d$C$F$$$J$$!W$H(B
okuyamak> $B$O8B$i$J$$$H;W$$$^$9$,!"8x;;$O9b$$$G$9$M!#(B

$B$b$&>/$7D9$/0zMQ$9$k$Y$-$G$7$?$+(B
 $B!V(Brand() $B$O!"(B 2**32 $B<~4|$N>hK!9gF1$K4p$E$/Mp?t%8%'%M%l!<%?$r;H(B
     $BMQ$7$F!"(B0 $B$+$i(B (2**31)-1 $B$^$G$NO"B3$7$?5?;wMp?t$rJV$7$^$9!#!W(B
$B$=$7$F!":G8e$K(B
$B!V!Z;HMQ>e$NN10UE@![(B
     $B@8@.$5$l$??t$N2<0L%S%C%H$O!"$"$^$j%i%s%@%`$G$O$J$$$N$G!"Cf0L(B
     $B%S%C(B $B%H(B $B$r;HMQ$7$F$/$@$5$$!#$H$j$o$1!":G2<0L%S%C%H$O!"(B0 $B$H(B 1
     $B$,8r8_$K8=$l$^$9!#!W(B
$B$J$N$G!"3N<B$G$9!#(B
-- 
Tomoaki Nishiyama
  e-mail:tomoaki@nibb.ac.jp
National Institute for Basic Biology
