$B $BI>2A $B>e$X(B: $B3JMWAG%Q%?!<%s<-=q$rMQ$$$?5!3#K]Lu(B $BLa$k(B: $BK]LuJ}K!(B   $BL\

$BK]Lu$NMM;R(B

$BK]Lu$N6qBNNc$r<($9!%!V3X@8$,%P%9$G3X9;$K9T$/!#!W$H$$$&F~NOJ8$rJ8%Q%?!<%s(B $B$K>H9g$7$?MM;R$r0J2<$K<($9!%(B
$BJ#?t$NE,9g%Q%?!<%s$NCf$N(B 1 $B$D$r?^(B4.3$B$K<($7$F$$$k!%$3$N>pJs$O(B $B?^(B4.2$B$N!VE,9g%Q%?!<%s>pJs(B 1 $B!W$KBP1~$7$F(B $B$$$k!%(B

$B?^(B 4.3: $BE,9g%Q%?!<%s>pJs(B 1

$B%L!"!<%f%&%O%X%i%A%L%NtJ,$G$"$kJQ?(BIMG WIDTH="103" HEIGHT="16" ALIGN="BOTTOM" BORDER="0" SRC="img22.png" ALT="$YRSNBF8$">$B$N>pJs$r3JMWAG%Q%?!<%s<-=q$H>H9g$9$kNc$r(B $B?^(B4.4$B$K<($9!%(B $B$3$N>pJs$r!VE,9g%Q%?!<%s>pJs$HJQ?t>pJs(B 1 $B!W$KIUM?$7$?$b$N$,!$?^(B 4.2$B$N!VE,9g%Q%?!<%s>pJs$HJQ?t>pJs(B 2 $B!W$KBP1~$7$F$$$k!%(B

$B?^(B 4.4: $B!VE,9g%Q%?!<%s>pJs(B 2$B!W$N85$K$J$k3JMWAG%Q%?!<%s8uJd72(B

$B?^(B4.4$B$N>pJs$r$b$H$K$7$F!$A0CV;l6g$r1QJ8%Q%?!<%s$KIUM?$7$?7k2L$r?^(B 4.5$B$K<($9!%?^(B4.4$B$G$O!$!V(Bat $N_k$$B!W!$!V(Bby $N_k$$B!W$N%Q%?!<%s(B $B$NA0CV;l$N@hF,$O>.J8;z$J$N$G!$?^(B4.5$B$N?75,1QJ8%Q%?!<%s$G$O8eJ}$KIU(B $BM?$5$l$F$$$k!%$^$?!$?^(B4.3$B$N1QJ8%Q%?!<%s$GB8:_$7$?!V(Bfrom $N3$$B!W$O!$(B $BF~NOJ8$KBP$7$FI,MW$N$J$$A0CV;lItJ,$G$"$k$N$G:o=|$7$F$$$k!%(B

$B?^(B 4.5: $B?75,1Q8l%Q%?!<%s$NNc(B

$B$3$l$i$K$h$C$F?7$7$/:n@.$5$l$?1QJ8%Q%?!<%s!$7ABVAG2r@O>pJs!$F|J8%Q%?!<%s(B $B$HJQ?t>pJs$GK]Lu4o(BITM$B$rMQ$$$FF|1QC18lK]Lu$r9T$&!%$=$7$F!$J#?t$NK]Lu8uJd(B $B$NCf$+$i(Btri-gram$B$K$h$C$FA*=P$r9T$&!%F|1QK]Lu(B $B$7$?Nc$r?^(B4.6$B$K<($9!%G$0U3JMWAG$KBP$9$kA0CV;l6g%Q%?!<%s$N8uJd$,(B $BJ#?t$"$kCf$+$i!$(Btri-gram$B$K$h$j!$!V(Bby$B!W$,$b$C$H$b9b$$%9%3%"$H$J$j!$=PNO(B $BJ8$N%Q%?!<%s$KA*$P$l$F$$$k!%(B

$B?^(B 4.6: $BK]LuNc(B