锘??xml version="1.0" encoding="utf-8" standalone="yes"?>深夜久久AAAAA级毛片免费看,国产成人精品三上悠亚久久,久久久久夜夜夜精品国产http://www.shnenglu.com/Icho/archive/2010/08/17/123705.htmlBrianBrianTue, 17 Aug 2010 05:51:00 GMThttp://www.shnenglu.com/Icho/archive/2010/08/17/123705.htmlhttp://www.shnenglu.com/Icho/comments/123705.htmlhttp://www.shnenglu.com/Icho/archive/2010/08/17/123705.html#Feedback0http://www.shnenglu.com/Icho/comments/commentRss/123705.htmlhttp://www.shnenglu.com/Icho/services/trackbacks/123705.htmlhttp://acm.pku.edu.cn/JudgeOnline/
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   榪欐槸鏈漢涓漢鏁寸悊鐨勶紝濡傛兂澶嶅埗錛岃闅忎究銆?/p>

Brian 2010-08-17 13:51 鍙戣〃璇勮
]]>鐗涢】娉曟眰騫蟲柟鏍廣愯漿銆?/title><link>http://www.shnenglu.com/Icho/archive/2010/08/17/123703.html</link><dc:creator>Brian</dc:creator><author>Brian</author><pubDate>Tue, 17 Aug 2010 05:49:00 GMT</pubDate><guid>http://www.shnenglu.com/Icho/archive/2010/08/17/123703.html</guid><wfw:comment>http://www.shnenglu.com/Icho/comments/123703.html</wfw:comment><comments>http://www.shnenglu.com/Icho/archive/2010/08/17/123703.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/Icho/comments/commentRss/123703.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/Icho/services/trackbacks/123703.html</trackback:ping><description><![CDATA[<p>姹俷鐨勫鉤鏂規牴錛屽厛鍋囪涓鐚滄祴鍊?co><wbr>DE><font face=NSimsun>X<sub>0</sub> = 1</font></co><wbr>DE>錛岀劧鍚庢牴鎹互涓嬪叕寮忔眰鍑?co><wbr>DE><font face=NSimsun>X<sub>1</sub></font></co><wbr>DE>錛屽啀灝?co><wbr>DE><font face=NSimsun>X<sub>1</sub></font></co><wbr>DE>浠ｅ叆鍏紡鍙寵竟錛岀戶緇眰鍑?co><wbr>DE><font face=NSimsun>X<sub>2</sub></font></co><wbr>DE>…閫氳繃鏈夋晥嬈¤凱浠ｅ悗鍗沖彲姹傚嚭n鐨勫鉤鏂規牴錛?co><wbr>DE><font face=NSimsun>X<sub>k+1</sub></font></co><wbr>DE></p> <p><font face=NSimsun><img title="鐗涢】娉曟眰騫蟲柟鏍廣愯漿銆?- Icho - Brian Warehouse" border=0 alt=x_(k+1)=1/2(x_k+n/(x_k)) src="http://pic.yupoo.com/punkid/5286852a16f4/chsf3aqv.jpg" width=111 height=37></font></p> <p>鍏堣鎴戜滑鏉ラ獙璇佷笅榪欎釜宸у鐨勬柟娉曞噯紜э紝鏉ョ畻涓?鐨勫鉤鏂規牴 (Computed by Mathomatic)</p> <pre>1-> x_new = ( x_old + y/x_old )/2 y (x_old + -----) x_old #1: x_new = --------------- 2 1-> calculate x_old 1 Enter y: 2 Enter initial x_old: 1 <strong> x_new = 1.5</strong> 1-> calculate x_old 2 Enter y: 2 Enter initial x_old: 1 <strong> x_new = 1.4166666666667</strong> 1-> calculate x_old 3 Enter y: 2 Enter initial x_old: 1 <strong> x_new = 1.4142156862745</strong> 1-> calculate x_old 10 Enter y: 2 Enter initial x_old: 1 Convergence reached after 6 iterations. <strong> x_new = 1.4142135623731</strong> ...</pre> <p>鍙錛岄殢鐫榪唬嬈℃暟鐨勫鍔狅紝榪愮畻鍊間細鎰堝彂鎺ヨ繎鐪熷疄鍊箋傚緢紲炲鐨勭畻娉曪紝鍙槸鎬庝箞鏉ョ殑鍛? 鏌ヤ簡涓?a title="Wikipedia: Newton's method" ><font color=#282e0e>wikipedia</font></a>鍜?a title="Wolfram: Newton's Iteration" ><font color=#282e0e>wolfram</font></a>錛屽師鏉ョ畻娉曠殑鍚嶅瓧鍙玁ewton’s Iteration (鐗涢】榪唬娉?銆?/p> <p>涓嬮潰鏄暟鐞嗕粙緇嶏紝涓嶅枩嬈㈡暟瀛︾殑璦涓嬩箣鎰忎篃灝辨槸緇濆ぇ閮ㄥ垎浜哄彲浠ョ暐榪囦簡銆?/p> <h3>綆鍗曟帹瀵?/h3> <p>鍋囪<co><wbr>DE><font face=NSimsun>f(x)</font></co><wbr>DE>鏄叧浜?co><wbr>DE><font face=NSimsun>X</font></co><wbr>DE>鐨勫嚱鏁?</p> <p><img title="鐗涢】娉曟眰騫蟲柟鏍廣愯漿銆?- Icho - Brian Warehouse" border=0 alt="An illustration of on<wbr>e iteration of Newton's method" src="http://pic.yupoo.com/punkid/1773352a25d8/9lcgjzet.jpg" width=300 height=247></p> <p>姹傚嚭<co><wbr>DE><font face=NSimsun>f(x)</font></co><wbr>DE>鐨勪竴闃跺錛屽嵆鏂滅巼:</p> <p><img title="鐗涢】娉曟眰騫蟲柟鏍廣愯漿銆?- Icho - Brian Warehouse" border=0 alt="f'(x_{n}) = frac{ mathrm{rise} }{ mathrm{run} } = frac{ mathrm{Delta y} }{ mathrm{Delta x} } = frac{ f( x_{n} ) - 0 }{ x_{n} - x_{n+1} } = frac{0 - f(x_{n})}{(x_{n+1} - x_{n})},!" src="http://pic.yupoo.com/punkid/1847652a26a3/zcbz5a4b.jpg" width=409 height=48></p> <p>綆鍖栫瓑寮忓緱鍒?</p> <p><img border=0 alt="x_(n+1)=x_n-(f(x_n))/(f^'(x_n)) " src="http://pic.yupoo.com/punkid/0290752a2462/t4yu9w45.jpg" width=108 height=37></p> <p>鐒跺悗鍒╃敤寰楀埌鐨勬渶緇堝紡榪涜榪唬榪愮畻鐩磋嚦姹傚埌涓涓瘮杈冪簿紜殑婊℃剰鍊鹼紝涓轟粈涔堝彲浠ョ敤榪唬娉曞憿?鐞嗙敱鏄腑鍊煎畾鐞?Intermediate Value Theorem):</p> <blockquote> <p>濡傛灉<co><wbr>DE><font face=NSimsun>f</font></co><wbr>DE>鍑芥暟鍦ㄩ棴鍖洪棿<co><wbr>DE><font face=NSimsun>[a,b]</font></co><wbr>DE>鍐呰繛緇紝蹇呭瓨鍦ㄤ竴鐐?co><wbr>DE><font face=NSimsun>x</font></co><wbr>DE>浣垮緱<co><wbr>DE><font face=NSimsun>f(x) = c</font></co><wbr>DE>錛?co><wbr>DE><font face=NSimsun>c</font></co><wbr>DE>鏄嚱鏁?co><wbr>DE><font face=NSimsun>f</font></co><wbr>DE>鍦ㄩ棴鍖洪棿<co><wbr>DE><font face=NSimsun>[a,b]</font></co><wbr>DE>鍐呯殑涓鐐?/p> </blockquote> <p>鎴戜滑鍏堢寽嫻嬩竴<co><wbr>DE><font face=NSimsun>X</font></co><wbr>DE>鍒濆鍊鹼紝渚嬪1錛屽綋鐒跺湴鐞冧漢閮界煡閬撻櫎浜?鏈韓涔嬪浠諱綍鏁扮殑騫蟲柟鏍歸兘涓嶄細鏄?銆傜劧鍚庝唬鍏ュ垵濮嬪鹼紝閫氳繃榪唬榪愮畻涓嶆柇鎺ㄨ繘錛岄愭闈犺繎綺劇‘鍊鹼紝鐩村埌寰楀埌鎴戜滑涓昏璁や負姣旇緝婊℃剰鐨勫間負姝€備緥濡傝姹?68鐨勫鉤鏂規牴錛屽洜涓?co><wbr>DE><font face=NSimsun>25<sup>2</sup> = 625</font></co><wbr>DE>錛岃?co><wbr>DE><font face=NSimsun>30<sup>2</sup> = 900</font></co><wbr>DE>錛屾垜浠彲鍏堜唬鍏ヤ竴鐚滄祴鍊?6錛岀劧鍚庤凱浠ｈ繍綆楋紝寰楀埌杈冪簿紜?27.7128銆?/p> <p>鍥炲埌鎴戜滑鏈寮濮嬬殑閭ｄ釜”鑾悕鍏跺”鐨勫叕寮忥紝鎴戜滑瑕佹眰鐨勬槸<co><wbr>DE><font face=NSimsun>N</font></co><wbr>DE>鐨勫鉤鏂規牴錛屼護<co><wbr>DE><font face=NSimsun>x<sup>2</sup> = n</font></co><wbr>DE>錛屽亣璁句竴鍏充簬<co><wbr>DE><font face=NSimsun>X</font></co><wbr>DE>鐨勫嚱鏁?co><wbr>DE><font face=NSimsun>f(x)</font></co><wbr>DE>涓?</p> <p><co><wbr>DE><font face=NSimsun>f(X) = X<sup>2</sup> - n</font></co><wbr>DE></p> <p>姹?co><wbr>DE><font face=NSimsun>f(X)</font></co><wbr>DE>鐨勪竴闃跺涓?</p> <p><co><wbr>DE><font face=NSimsun>f'(X) = 2X</font></co><wbr>DE></p> <p>浠ｅ叆鍓嶉潰姹傚埌鐨勬渶緇堝紡涓?</p> <p><co><wbr>DE><font face=NSimsun>X<sub>k+1</sub> = X<sub>k</sub> - (X<sub>k</sub><sup>2</sup> - n)/2X<sub>k</sub></font></co><wbr>DE></p> <p>鍖栫畝鍗沖緱鍒版垜浠渶鍒濇彁鍒扮殑閭ｄ釜姹傚鉤鏂規牴鐨勭濂囧叕寮忎簡:</p> <p><img title="鐗涢】娉曟眰騫蟲柟鏍廣愯漿銆?- Icho - Brian Warehouse" border=0 alt=x_(k+1)=1/2(x_k+n/(x_k)) src="http://pic.yupoo.com/punkid/5286852a16f4/chsf3aqv.jpg" width=111 height=37></p> <h3>鐢ㄦ嘲鍕掑叕寮忔帹瀵?/h3> <p>鎴戜箣鍓嶄粙緇嶈繃鍦?em>The Art and Science of C</em>涓涔︿腑鏈夌敤鍒?a title="The Art and Science of C 闃呰絎旇 II" ><font color=#282e0e>娉板嫆鍏紡姹傚鉤鏂規牴鐨勭畻娉?/font></a>錛屽叾瀹炵墰欏胯凱浠ｆ硶涔熷彲浠ョ湅浣滄槸娉板嫆鍏紡(Taylor Series)鐨勭畝鍖栵紝鍏堝洖欏句笅娉板嫆鍏紡:</p> <p><img border=0 alt="f(x_0+epsilon)=f(x_0)+f^'(x_0)epsilon+1/2f^('')(x_0)epsilon^2+.... " src="http://pic.yupoo.com/punkid/1697952a1ea6/0k7gu191.jpg" width=269 height=23></p> <p>浠呬繚鐣欑瓑寮忓彸杈瑰墠涓ら」:</p> <p><img border=0 alt="f(x_0+epsilon) approx f(x_0)+f^'(x_0)epsilon." src="http://pic.yupoo.com/punkid/5762152a1f4e/y8nndhdy.jpg" width=160 height=16></p> <p>浠?co><wbr>DE><font face=NSimsun>f(X<sub>0</sub>+ε) = 0</font></co><wbr>DE>錛屽緱鍒?</p> <p><img border=0 alt="epsilon_0=-(f(x_0))/(f^'(x_0))" src="http://pic.yupoo.com/punkid/3476952a2106/n7gfjyvw.jpg" width=82 height=37></p> <p>鍐嶄護<co><wbr>DE><font face=NSimsun>X<sub>1</sub> = X<sub>0</sub> + ε<sub>0</sub></font></co><wbr>DE>錛屽緱鍒?co><wbr>DE><font face=NSimsun>ε<sub>1</sub></font></co><wbr>DE>…渚濇綾繪帹鍙煡:</p> <p><img border=0 alt="epsilon_n=-(f(x_n))/(f^'(x_n))" src="http://pic.yupoo.com/punkid/3903852a21fb/kwl644nf.jpg" width=82 height=37></p> <p>杞寲涓?</p> <p><img border=0 alt="x_(n+1)=x_n-(f(x_n))/(f^'(x_n)) " src="http://pic.yupoo.com/punkid/0290752a2462/t4yu9w45.jpg" width=108 height=37></p> <img src ="http://www.shnenglu.com/Icho/aggbug/123703.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/Icho/" target="_blank">Brian</a> 2010-08-17 13:49 <a href="http://www.shnenglu.com/Icho/archive/2010/08/17/123703.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>Dempster-Shafer Theoryhttp://www.shnenglu.com/Icho/archive/2010/08/17/123700.htmlBrianBrianTue, 17 Aug 2010 05:38:00 GMThttp://www.shnenglu.com/Icho/archive/2010/08/17/123700.htmlhttp://www.shnenglu.com/Icho/comments/123700.htmlhttp://www.shnenglu.com/Icho/archive/2010/08/17/123700.html#Feedback0http://www.shnenglu.com/Icho/comments/commentRss/123700.htmlhttp://www.shnenglu.com/Icho/services/trackbacks/123700.html       History..

       DS鐞嗚鍩轟簬涓や釜鎬濇兂錛?. the idea of obtaining degrees of belief for one question from subjective probabilities for a related question 鑾峰彇涓涓棶棰樺浜庡彟涓涓棶棰樼殑淇″害鍊箋?. Dempster's rule for combining such degrees of belief when they are based on independent items of evidence 褰撹繖浜涗俊搴﹀奸兘鍩轟簬鐙珛鐨勮瘉鎹椂錛屾妸浠栦滑緇撳悎璧鋒潵鐨凞瑙勫垯銆?/p>

       涓轟簡鎻忚堪絎竴涓濇兂錛岃冭檻鎴戠煡閬撴垜鐨勬湅鍙婤etty鏄惁鍙潬鐨勪富瑙傛鐜囥傛垜璁や負濂瑰彲闈犵殑姒傜巼鏄?.9錛屼笉鍙潬鐨勬鐜囨槸0.1銆傚亣璁懼ス鍛婅瘔鎴戜竴涓爲鏋濇帀鍦ㄤ簡鎴戠殑杞︿笂銆傚綋濂瑰彲闈犵殑鏃跺欙紝榪欎釜璁烘柇涓瀹氭槸鐪熺殑錛屽綋濂逛笉鍙潬鐨勬椂鍊欒繖涓鏂嵈涓嶄竴瀹氭槸鍋囩殑銆傛墍浠ュ綋浠呮湁濂圭殑璇佽瘝鐨勬椂鍊檍ustifies0.9鐨勪俊搴︽湁涓涓爲鏋濇帀鍦ㄤ簡鎴戠殑杞︿笂浜嗭紝浣嗕粎浠呮湁0鐨勪俊搴﹀間繚璇佹病鏈夋爲鏋濇帀鍦ㄦ垜鐨勮濺涓娿傝繖涓浂騫朵笉鎰忓懗鐫鎴戝彲浠ヨ偗瀹氭病鏈夋爲鏋濇帀鍦ㄦ垜鐨勮濺涓婏紝鑰屾鐜囬浂鍙互淇濊瘉錛涘畠浠呬粎琛ㄧず浜咮etty鐨勮瘉璇嶆病鏈夌粰鎴戜換浣曠悊鐢辯浉淇℃病鏈夋爲鏋濇帀鍦ㄦ垜鐨勮濺涓娿傝繖涓?.9鍜?鍦ㄤ竴璧鋒瀯鎴愪簡涓涓俊搴﹀嚱鏁幫紙belief function錛夈?/p>

       鍋囪錛屼粠鍙﹀涓涓柟闈紝Betty鍜孲ally浜掔浉鐭涚浘鈥斺擝etty璇翠竴涓爲鏋濇帀鍦ㄤ簡鎴戠殑杞︿笂錛孲ally璇存病鏈夋爲鏋濇帀鍦ㄤ簡鎴戠殑杞︿笂銆傚湪榪欑鎯呭喌涓嬶紝浠栦滑涓嶈兘閮藉錛屽洜涓轟笉鍙兘涓や釜浜洪兘鏄彲闈犵殑鈥斺斿彧鏈夊彲鑳芥湁涓涓漢鏄彲闈犵殑鎴栬呴兘涓嶅彲闈犮備笁縐嶆儏鍐碉紝鍙湁Betty鍙潬錛屽彧鏈塖ally鍙潬錛屾垨閮戒笉鍙潬錛屾鐜囧垎鍒負0.09錛?.09錛?.01錛岀粰瀹氫笉鏄兘鍙潬鐨勬儏鍐典笅錛屽悗楠屾鐜囨槸9/19,9/19,1/19銆傦紙 0.09/(0.09+0.09+0.01) 錛夋墍浠ユ垜浠湁9/19鐨勪俊搴﹀浜庢湁涓涓爲鏋濇帀鍦ㄤ簡鎴戠殑杞︿笂錛圔etty鍙潬錛変互鍙?/19鐨勪俊搴﹀浜庢病鏈夋爲鏋濇帀鍦ㄤ簡鎴戠殑杞︿笂錛圫ally鍙潬錛夈?/p>

       鎬葷殑鏉ヨ錛屾垜浠浠庡彟涓涓棶棰橈紙璇佷漢鏄惁鍙潬錛夌殑姒傜巼鑾峰彇涓涓棶棰樼殑淇″害錛堟槸鍚︽湁鏍戞灊鎺夊湪浜嗘垜鐨勮濺涓婏紵錛夈侱empster瑙勫垯棣栧厛鏈変竴涓亣璁炬垜浠煡閬撴鐜囩殑闂閮芥槸鐙珛鐨勫浜庢垜浠富瑙傜殑姒傜巼鍒ゆ柇錛屼絾榪欎釜鐙珛鎬т粎浠呮槸涓涓猵riori錛涘綋鍦ㄨ瘉鎹殑涓嶅悓閮ㄥ垎鍙戠幇鍐茬獊鐨勬椂鍊欏氨涓嶅湪闇瑕佷簡錛堬紵錛夈?/p>

       鍦ㄤ竴涓叿浣撻棶棰樹腑瀹炵幇DS鐞嗚澶ц嚧鍖呮嫭涓や釜鐩稿叧鐨勯棶棰樸傞鍏堬紝鎴戜滑蹇呴』鎶婇棶棰樼殑涓嶇‘瀹氭у垎鎴愯瘉鎹殑鍏堥獙鐙珛鐨勯儴鍒嗐傜劧鍚庢垜浠啀榪愯Dempster瑙勫垯銆傝繖涓や釜闂鍜屼粬浠殑瑙ｅ喅鏂規硶閮芥槸闈炲父鐩稿叧鐨勩傛妸涓嶇‘瀹氭鍒嗘垚鐙珛鐨勯儴鍒嗕駭鐢熷寘鍚簡璇佹嵁錛堝叾涓湁涓嶅悓浣嗙浉鍏崇殑闂錛変笉鍚岄儴鍒嗙殑緇撴瀯錛屼嬌鐢ㄨ繖涓粨鏋勫彲浠ヨ璁＄畻鍙銆備緥濡傦紝鍋囪Betty鍜孲ally鐩鎬簰鐙珛鐨勪綔璇佷粬浠惉鍒頒簡鏈夎醇鍒版垜鐨勬埧闂淬備粬浠彲鑳介兘浼氭妸涓鍙嫍鐨勫櫔澹拌浠ヤ負鎴愭槸涓涓醇錛岀敱浜庤繖縐嶅叕鍏辯殑涓嶇‘瀹氭э紝鎴戜笉鑳界洿鎺ヤ嬌鐢―瑙勫垯鏉ユ妸浠栦滑鐨勪俊搴︾粨鍚堣搗鏉ャ備絾鏄鏋滄垜鐭ラ亾鍒扮嫍瀛樺湪鐨勫彲鑳芥э紝鐒跺悗鎴戣兘紜畾璇佹嵁鐨勪笁涓嫭绔嬮儴鍒嗭細鎴戝彟涓涓敮鎸佹垨鍙嶅鐙楀瓨鍦ㄧ殑璇佹嵁錛屾垜瀵笲etty鍙潬鐨勮瘉鎹紝浠ュ強鎴戝Sally鍙潬鐨勮瘉鎹傛垜鑳介氳繃D瑙勫垯鎶婅瘉鎹殑涓変釜閮ㄥ垎緇撳悎璧鋒潵錛屽湪鍖呭惈浜嗚繖浜涗笉鍚岄棶棰樼殑緇撴瀯琚冭檻鐨勬椂鍊欙紝璁＄畻灝卞彲浠ユ柦琛屼簡銆?/p>

Brian 2010-08-17 13:38 鍙戣〃璇勮
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