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绮鹃�夊叕鏂囪寖鏂囷紝绠＄悊绫伙紝宸ヤ綔鎬荤粨绫伙紝宸ヤ綔璁″垝绫绘枃妗ｏ紝娆㈣繋闃呰涓嬭浇
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绮鹃�夊叕鏂囪寖鏂囷紝绠＄悊绫伙紝宸ヤ綔鎬荤粨绫伙紝宸ヤ綔璁″垝绫绘枃妗ｏ紝鎰熻阿闃呰涓嬭浇
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1
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淇℃伅璁轰笌缂栫爜瀹為獙
1
瀹為獙涓�
鍏充簬淇℃簮鐔电殑瀹為獙
鐝骇锛?/p>
鐢靛瓙
131501
濮撳悕锛?/p>
璧佃嫳鍑?/p>
瀛﹀彿锛?/p>
201315020137
鏃堕棿锛?/p>
涓�銆佸疄楠岀洰鐨?/p>
1.
鎺屾彙绂绘暎淇℃簮鐔电殑鍘熺悊鍜岃绠楁柟娉曘�?/p>
2.
鐔熸倝
matlab
杞欢鐨勫熀鏈搷浣滐紝缁冧範浣?/p>
鐢?/p>
matlab
姹傝В淇℃簮鐨勪俊鎭喌銆?/p>
3.
鑷鍥惧儚鐔电殑鐩稿叧姒傚康锛屽苟搴旂敤鎵�瀛︾煡璇嗭紝浣?/p>
鐢?/p>
matlab
姹傝В鍥惧儚鐔点�?/p>
浜屻�佸疄楠屽師鐞?/p>
1.
绂绘暎淇℃簮鐩稿叧鐨勫熀鏈蹇点�佸師
鐞嗗拰璁＄畻鍏紡
浜х敓绂绘暎淇℃伅鐨勪俊婧愮О涓虹鏁ｄ俊婧愩�傜鏁ｄ俊婧愬彧鑳戒骇鐢熸湁闄愮绗﹀彿銆?/p>
闅忔満浜嬩欢鐨勮嚜淇℃伅閲?/p>
I
涓哄叾瀵瑰簲鐨勯殢鏈哄彉閲?/p>
xi
鍑虹幇姒傜巼瀵规暟鐨勮礋鍊笺�?/p>
鍗筹細
I = -log2p
( xi)
闅忔満浜嬩欢
X
鐨勫钩鍧囦笉纭畾搴?/p>
H
涓虹鏁ｉ殢鏈哄彉閲?/p>
xi
鍑虹幇姒傜巼鐨勬暟瀛︽湡鏈涳紝
鍗筹細
?
2.
浜屽厓淇℃簮鐨勪俊鎭喌
璁句俊婧愮鍙烽泦
X={0
锛?/p>
1}
锛?/p>
姣忎釜绗﹀彿鍙戠敓鐨勬鐜囧垎鍒负
p(0)= p
锛?/p>
p(1)=
q
锛?/p>
p+
q
=1
锛屽嵆淇℃簮鐨勬鐜囩┖闂翠负
锛?/p>
?
鍒欒浜屽厓淇℃簮鐨勪俊婧愮喌涓猴細
H( X)
= - plogp
鈥?/p>
qlogq
= - plogp
鈥?/p>
(1 - p)log(1- p)
鍗筹細
H (p) = - plogp
鈥?/p>
(1 -
p)log(1- p)
鍏朵腑
0 鈮?nbsp;p
鈮?
3.
MATLAB
浜岀淮缁樺浘
鐢?/p>
matlab
涓殑
鍛戒护
plot( x ,
y)
灏卞彲浠ヨ嚜鍔ㄧ粯鍒跺嚭浜岀淮鍥炬潵銆?/p>
渚?/p>
1-2
锛?/p>
鍦?/p>
matlab
涓婄粯鍒朵綑寮︽洸绾垮浘锛?/p>
y
=
cos
x
锛屽叾涓?/p>
0
鈮?nbsp;
x
鈮?nbsp;
2?銆?/p>
>>x
=0::2*pi
锛?/p>
%
鐢熸垚妯潗鏍囧悜閲忥紝浣垮叾涓?/p>
0
锛?/p>
锛?/p>
锛屸�︼紝
>>y =cos(x )
锛?/p>
%
璁＄畻浣欏鸡鍚戦噺
>>plot(x ,y )
%
缁樺埗鍥惧舰
4.
MATLAB
姹傝В绂绘暎淇℃簮鐔?/p>
姹傝В淇℃伅鐔佃繃绋嬶細
1)
杈撳叆涓�涓鏁ｄ俊婧愶紝骞舵鏌?/p>
璇ヤ俊婧愭槸鍚︽槸瀹屽闆嗐�?/p>
2)
鍘婚櫎淇℃簮涓鍙峰垎甯冩鐜囦负闆剁殑鍏冪礌銆?/p>
3)
鏍规嵁骞冲潎淇℃伅閲?/p>
鍏紡锛屾眰鍑虹鏁ｄ俊婧愮殑鐔点�?/p>
5.
鍥惧儚鐔电殑鐩稿叧鐭ヨ瘑
鍥惧儚鐔垫槸涓�绉嶇壒寰佺殑缁熻
褰㈠紡锛屽畠鍙嶆槧浜嗗浘鍍忎腑骞冲潎淇℃伅閲忕殑澶氬皯銆?/p>
鍥惧儚鐨勪竴缁寸喌琛ㄧず鍥惧儚涓伆搴﹀垎甯冪殑鑱氶泦
鐗瑰緛鎵�鍖呭惈鐨勪俊鎭噺锛?/p>
浠?/p>
Pi
琛ㄧず鍥惧儚涓伆搴﹀�间负
i
鐨勫儚绱犳墍鍗犵殑姣斾緥锛?/p>
鍒欏畾涔夌伆搴﹀浘鍍忕殑
涓�鍏冪伆搴︾喌涓?/p>
Pi
瀵瑰簲鐏板害鍊艰嚜淇℃伅閲忕殑姒傜巼骞冲潎鍊笺�?/p>
鍥惧儚鐔佃绠楄繃绋嬶細
1)
杈撳叆
涓�骞呭浘鍍忥紝骞跺皢鍏惰浆鎹㈡垚鐏板害鍥惧儚銆?/p>
2)
缁熻鍑哄浘鍍忎腑姣忎釜鐏板害闃惰薄绱犳鐜囥�?/p>
3)
璁＄畻