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Authority欏甸潰錛氭煇涓鍩熸垨鑰呮煇涓瘽棰樼浉鍏崇殑楂樿川閲忕綉欏?/div>
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HillTop綆楁硶
1銆佷粠嫻烽噺鐨勪簰鑱旂綉緗戦〉涓氳繃涓瀹氱殑瑙勫垯閫夊嚭涓撳欏甸潰瀛愰泦鍚堬紝騫跺崟鐙負鍏跺緩绔嬬儲寮?/div>
2銆佹帴鏀剁敤鎴峰彂鍑虹殑鏌ヨ璇鋒眰鏃訛紝鏍規嵁鐢ㄦ埛鏌ヨ鐨勪富棰橈紝浠庝笓瀹墮〉闈㈠瓙闆嗗悎涓壘鍑洪儴鍒嗙浉鍏蟲ф渶寮虹殑涓撳欏甸潰錛屽姣忎釜涓撳欏甸潰璁$畻鐩稿叧鎬у緱鍒?/div>
3銆佹牴鎹洰鏍囬〉闈紙浠庣儲寮曠郴緇熶腑涓彇鍒扮殑欏甸潰錛夊拰榪欎簺涓撳欏甸潰鐨勯摼鎺ュ叧緋?瀵圭洰鏍囬〉闈㈣繘琛屾帓搴?/div>
4銆佹暣鍚堢浉鍏充笓瀹墮〉闈㈠拰寰楀垎杈冮珮鐨勭洰鏍囬〉闈綔涓烘悳绱㈢粨鏋滐紝榪斿洖緇欑敤鎴?/div>
浠庡睘緇勭粐欏甸潰錛氫富鏈篒P鍦板潃鐨勫墠3涓綉孌電浉鍚岋紝緗戠珯鍩熷悕涓殑涓誨煙鍚嶇浉鍚?/div>
涓撳欏甸潰
1銆佷笌鏌愪釜涓婚鐩稿叧鐨勯珮璐ㄩ噺欏甸潰
2銆佽繖浜涢〉闈㈢殑閾炬帴鎵鎸囧悜鐨勯〉闈㈢浉浜掍箣闂存槸闈炰粠灞炵粍緇囬〉闈?/span>
3銆佽繖浜涜鎸囧悜鐨勯〉闈㈠ぇ澶氭暟鏄笌涓撳欏甸潰涓婚鐩歌繎
HillTop鍙互涓庢煇涓帓搴忕畻娉曠浉緇撳悎錛屼笉閫傚悎浣滀負涓涓嫭绔嬬殑緗戦〉鎺掑簭綆楁硶鏉ヤ嬌鐢紝鍥犱負褰撴棤娉曞緱鍒頒竴涓凍澶熷ぇ鐨勪笓瀹墮〉闈㈡椂錛屼細榪斿洖絀虹粨鏋溿?/div>
姝ラ1錛氫笓瀹墮〉闈㈡悳绱?/strong>
浠?浜?鍗冧竾緗戦〉涓紝絳涢夊嚭250涓囦綔涓轟笓瀹墮〉闈紝涓撳欏甸潰鐗瑰緛:
1銆侀〉闈腑鑷沖皯鍖呭惈K涓嚭閾撅紝K鍙互浜轟負鎸囧畾
2銆並涓嚭閾炬寚鍚戠殑鎵鏈夐〉闈㈢浉浜掍箣闂寸殑鍏崇郴錛岄兘絎﹀悎闈炰粠灞炵粍緇囬〉闈?/div>
瀵逛笓瀹墮〉闈㈠崟鐙緩绱㈠紩錛屼笖鍙鍏抽敭瀛楁(Key Phrase)榪涜绱㈠紩錛屽叧閿瓧孌靛寘鍚?綾諱俊鎭細緗戦〉鏍囬錛孒1鏍囩鍐呮枃瀛楀拰URL閿氭枃瀛?/div>
鍏抽敭瀛楁鏈夊獎鍝嶈寖鍥達紙鍙互鏀厤Qualify鐨勯摼鎺ワ級錛屼緷嬈′負錛屾爣棰?>H1鏍囩->URL閿氭枃瀛?/div>
鍦ㄨ綆楃綉欏墊帓搴忔椂錛屽鏌ヨ瀛楁鍦ㄤ笉鍚岀殑鍏抽敭瀛楁涓紝浼氫嬌鐢ㄤ笉鍚岀殑鏉冨?/div>
緋葷粺鎺ユ敹鍒扮敤鎴鋒煡璇錛屽皢瀵逛笓瀹墮〉闈㈣繘琛屾墦鍒嗭紝涓昏鑰冭檻浠ヤ笅3綾諱俊鎭細
1銆佸叧閿瓧孌靛寘鍚簡澶氬皯璇?/div>
2銆佸叧閿墖孌墊湰韜殑綾誨瀷錛屽嵆鍏抽敭瀛楁鐨勭被鍨?/div>
3銆佺敤鎴鋒煡璇㈠拰鍏抽敭璇嶇殑澶遍厤鐜囷紝鍗沖叧閿瓧孌典腑涓嶅睘浜庢煡璇㈢殑鍗曡瘝涓暟鍗犲叧閿墖孌墊誨崟璇嶄釜鏁扮殑姣旂巼
姝ラ2錛氱洰鏍囬〉闈㈡帓搴?/strong>
Hilltop綆楁硶鍖呭惈鐨勫熀鏈亣璁撅細涓涓洰鏍囬〉闈㈠鏋滄槸婊¤凍鐢ㄦ埛鏌ヨ鐨勯珮璐ㄩ噺鎼滅儲緇撴灉錛屽叾鍏呭垎蹇呰鏉′歡鏄鐩爣欏甸潰鏈夐珮璐ㄩ噺涓撳欏甸潰閾炬帴鎸囧悜
涓轟繚璇佷笂榪板亣璁劇殑鎴愮珛錛孒illtop綆楁硶鍦ㄨ繖涓樁孌甸渶瑕佸涓撳欏甸潰鐨勫嚭閾句粩緇嗚繘琛岀攧鍒紝浠ヤ繚璇佹煡璇㈡椂錛岄夊嚭閭d簺鍜屾煡璇㈠瘑鍒囩浉鍏崇殑鐩爣欏甸潰銆?/div>
鍦ㄨ繘琛屼紶閫掑垎鍊間箣鍓嶏紝棣栧厛闇瑕佸閾炬帴鍏崇郴榪涜鏁寸悊錛?strong>鑳藉鑾峰緱涓撳欏甸潰鍒嗗肩殑鐩爣欏甸潰闇瑕佹弧瓚充互涓嬩袱鐐硅姹傦細
鏉′歡1銆佽嚦灝戦渶瑕佷袱涓笓瀹墮〉闈㈡湁閾炬帴鎸囧悜鐩爣欏甸潰錛屼笖涓や釜涓撳欏甸潰涓嶈兘鏄粠灞炵粍緇囬〉闈?/div>
鑳藉鑾峰緱浼犻掑垎鍊肩殑鐩爣欏甸潰涓瀹氭湁澶氫釜涓撳欏甸潰閾炬帴鎸囧悜錛岀洰鏍囬〉闈㈡墍鑾峰緱鐨勬諱紶鎾垎鍊兼槸姣忎釜鏈夐摼鎺ユ寚鍚戠殑涓撳欏甸潰鎵浼犻掔殑鍒嗗間箣鍜?/div>
鏉′歡2銆佷笓瀹墮〉闈㈠拰鎵鎸囧悜鐨勭洰鏍囬〉闈笉鑳芥槸浠庡睘緇勭粐欏甸潰
鐩爣欏甸潰鏉冨艱綆楁楠?/strong>錛?/div>
1銆佹壘鍒頒笓瀹墮〉闈腑閭d簺鑳藉鏀厤欏甸潰鐨勫叧閿墖孌甸泦鍚圫
2銆佺粺璁涓寘鍚敤鎴鋒煡璇㈣瘝鐨勫叧閿墖孌典釜鏁癟錛孴瓚婂ぇ鏉冨艱秺澶?/div>
3銆佷笓瀹墮〉闈㈢粰鐩爣欏甸潰浼犻掑垎鍊鹼細E*T,E涓轟笓瀹墮〉闈㈡湰韜湪絎竴闃舵璁$畻寰楀埌鐨勭浉鍏沖緱鍒嗭紝T涓篵姝ラ璁$畻鍒嗗?/div>
瀵逛簬鍖呭惈澶氫釜鏌ヨ璇嶇殑鐢ㄦ埛璇鋒眰錛屽垯姣忎釜鏌ヨ璇嶅崟鐙綆楋紝灝嗗涓煡璇㈣瘝鐨勪紶閫掑垎鍊肩瘡鍔?/div>
Hilltop綆楁硶瀛樺湪涓嶩ITS綆楁硶綾諱技鐨勮綆楁晥鐜囬棶棰橈紝闅忕潃涓撳欏甸潰闆嗗悎鐨勫澶?/div>
鍏朵粬鏀硅繘綆楁硶
1銆佹櫤鑳芥父璧版ā鍨?Intelligent Surfer Model)
鍒ゆ柇緗戦〉鍖呭惈鐨勯摼鎺ユ墍鎸囧悜鐨勭綉欏靛唴瀹瑰拰鐢ㄦ埛鏌ヨ鐨勭浉鍏蟲э紝浠ユ鏉ユ敼鍠勯摼鎺ュ垎鏋愭晥鏋?/div>
2銆佸亸緗父璧版ā鍨?Biased Sufer Model)
鏅鴻兘娓歌蛋妯″瀷鑰冭檻鐨勬槸緗戦〉鍐呭鍜岀敤鎴鋒煡璇㈢殑鐩稿叧鎬э紝鑰屽亸娓歌蛋妯″瀷鑰冭檻鐨勬槸閾炬帴鎸囧悜鐨勭綉欏靛唴瀹瑰拰褰撳墠嫻忚緗戦〉鍐呭涔嬮棿鐨勭浉浼兼?/div>
3銆丳HITS綆楁硶(Probability Analogy of HITS)
PHITS鏄HITS綆楁硶鐨勭洿鎺ユ敼榪涖?/span>PHITS綆楁硶璁や負涓嶅悓閾炬帴鍏朵紶閫掓潈鍊肩殑鑳藉姏搴旇鏄笉鍚岀殑錛?/span>PHITS闇瑕佽綆椾袱涓〉闈鍜孴涔嬮棿閾炬帴鐨勮繛鎺ュ己搴?/span>
閾炬帴鐨勫己搴︿緷鎹〉闈鍜孴涔嬮棿鐩鎬技搴︾‘瀹?/span>
4銆丅FS綆楁硶(Backward Forward Step)
瀵筍ALSA綆楁硶鐨勬墿灞曪紝瀵笻ITS綆楁硶鐨勯檺鍒?/div>
瑙i櫎浜哠ALSA綆楁硶鍙厑璁哥洿鎺ョ浉閭葷綉欏墊墠鑳芥湁褰卞搷鐨勯檺鍒訛紝鍙緗戦〉S鍜孴鍙氳揪錛屽嵆鍙緗戦〉T鏂藉姞褰卞搷錛屽鏋滅綉欏礢璺濈緗戦〉T璺濈瓚婅繙錛岄偅涔堢綉欏礢鐨勫獎鍝嶅氨闅忕潃璺濈澧炲ぇ鑰屽憟鐜拌“鍑?/div>

]]>榪欏氨鏄悳绱㈠紩鎿庯紞絎旇瘯5-媯绱㈡ā鍨嬩笌鎼滅儲鎺掑簭http://m.shnenglu.com/humanchao/archive/2013/11/04/204084.html鑳℃弧瓚?/dc:creator>鑳℃弧瓚?/author>Mon, 04 Nov 2013 04:56:00 GMThttp://m.shnenglu.com/humanchao/archive/2013/11/04/204084.htmlhttp://m.shnenglu.com/humanchao/comments/204084.htmlhttp://m.shnenglu.com/humanchao/archive/2013/11/04/204084.html#Feedback0http://m.shnenglu.com/humanchao/comments/commentRss/204084.htmlhttp://m.shnenglu.com/humanchao/services/trackbacks/204084.html媯绱㈡ā鍨嬩笌鎼滅儲鎺掑簭
鏈閲嶈鐨勪袱涓洜绱狅紝鐢ㄦ埛鏌ヨ涓庣綉欏電浉鍏蟲э紝緗戦〉閾炬帴鎯呭喌
媯绱㈡ā鍨嬶細鐢ㄦ埛鏌ヨ涓庣綉欏電浉鍏蟲?/span>
甯冨皵妯″瀷錛屽悜閲忕┖闂存ā鍨嬶紝姒傜巼妯″瀷錛岃璦妯″瀷錛屾満鍣ㄥ涔犳帓搴忕畻娉?/span>

甯冨皵妯″瀷錛氭暟鎹熀紜鏄泦鍚堣錛屾悳绱㈢粨鏋滆繃浜庣矖緋欙紝鏃犳硶閲忓寲鎼滅儲璇嶄笌鏂囨。涔嬪墠鐨勭浉鍏蟲?/div>

鍚戦噺絀洪棿妯″瀷錛氭妸鏂囨。鐪嬪仛鏄敱T緇寸壒寰佺粍鎴愮殑涓涓悜閲忥紝鏈甯哥敤鐨勬槸浠ュ崟璇嶄綔涓虹壒寰侊紝瀹為檯搴旂敤涓紝鏂囨。鐨勭淮搴︾浉褰撻珮錛堟垚鍗冧笂涓囷級
灝嗘煡璇㈠拰鏂囨。涔嬮棿鐨勫唴瀹圭浉浼兼т綔涓虹浉鍏蟲х殑鏇夸唬
璁$畻鐩鎬技鎬э紝浣跨敤COSINE錛岃綆楁煡璇㈣瘝鐗瑰緛鏉冨間笌鏂囨。涓瘡涓壒寰佹潈鍊煎悜閲忕殑鐐圭Н
鐗瑰緛鏉冮噸錛氱敱璇嶉Tf錛岄嗘枃妗i鐜嘔DF紜畾
璇嶉Tf錛?/span>Wtf=a+(1-a)*Tf/Max(Tf)
a鍙?.4鏁堟灉杈冨ソ
閫嗘枃妗i鐜囧洜瀛?/strong>錛氭枃妗i泦鍚堣寖鍥寸殑涓縐嶅叏灞鍥犲瓙錛岀壒寰佸崟璇嶄箣闂寸殑鐩稿閲嶈鎬?/div>
鏈夌爺絀惰呰繘涓姝ュ垎鏋愯涓猴細IDF浠h〃浜嗗崟璇嶅甫鏈夌殑淇℃伅閲忕殑澶氬皯錛堢喌錛夛紝鍏跺艱秺楂橈紝璇存槑鍏朵俊鎭惈閲忚秺澶氾紝瓚婃湁浠峰?/div>
IDFk=log(N/nk)
N浠h〃鏂囨。闆嗗悎涓誨叡鏈夊灝戜釜鏂囨。錛宯k浠h〃鐗瑰緛鍗曡瘝k鍦ㄥ叾涓灝戜釜鏂囨。涓嚭鐜拌繃
Weight_word=Tf*IDF錛岀壒寰佹潈鍊艱秺澶э紝瓚婂彲鑳芥槸濂界殑鎸囩ず璇?/div>
鏌ヨ璇嶅湪鏌愪釜鏂囨。涓殑璇嶉瓚婇珮錛屽湪鍏朵粬鏂囨。涓嚭鐜扮殑璇嶉瓚婁綆錛岃繖涓瘝鐨勬潈鍊艱秺楂?/strong>
鍚戦噺絀洪棿妯″瀷鏄粡楠屽瀷鐨勬ā鍨嬶紝闈犵洿瑙夊拰緇忛獙涓嶆柇鎽哥儲瀹屽杽錛岀己涔忔槑紜殑鐞嗚鎸囧鏀硅繘鏂瑰悜
姒傜巼鎺掑簭鍘熺悊錛氱粰瀹氫竴涓敤鎴鋒煡璇紝濡傛灉鎼滅儲緋葷粺鑳藉鍦ㄦ悳绱㈢粨鏋滄帓搴忔椂鎸夌収鏂囨。鍜岀敤鎴烽渶姹傜殑鐩稿叧鎬х敱楂樺埌浣庢帓搴忥紝閭d箞榪欎釜鎼滅儲緋葷粺鐨勫噯紜ф槸鏈浼樼殑銆?/div>
灝哖(D|R)/P(D|NR)澶у皬榪涜闄嶅簭鎺掑垪錛屽緱鍒版悳绱㈢浉鍏蟲ф帓搴?/div>

浜屽厓鐙珛妯″瀷

浜屽厓鍋囪錛?/strong>涓閬嶆枃妗e湪鐢辯壒寰佽繘琛岃〃紺虹殑鏃跺欙紝浠ョ壒寰?#8220;鍑虹幇”鍜?#8220;涓嶅嚭鐜?#8221;涓ょ鎯呭喌鏉ヨ〃紺?/div>
璇嶆眹鐙珛鍋囷細鏂囨。涓嚭鐜頒換鎰忎竴涓瘝鍦ㄦ枃妗g殑鍒嗗竷姒傜巼涓嶄緷璧栦簬鍏朵粬鍗曡瘝鏄惁鍑虹幇

BMI妯″瀷錛氬熀浜庝簩鍏冨亣璁炬帹瀵艱屽嚭錛屽浜庡崟璇嶇壒寰侊紝鍙冭檻鏄惁鍦ㄦ枃妗d腑鍑虹幇榪囷紝鑰屼簡鑰冭檻鍗曡瘝鐨勬潈鍊?/span>
P(D|R)/P(D|NR) = pi(1-si)/si(1-pi)
log( pi(1-si)/si(1-pi) )
pi浠h〃絎琲涓崟璇嶅湪鐩稿叧鏂囨。闆嗗悎鍐呭嚭鐜扮殑姒傜巼錛屽湪浜屽厓鍋囪涓嬶紝鍙互鐢ㄥ寘鍚繖涓崟璇嶇殑鐩稿叧鏂囨。涓暟ri闄や互鐩稿叧鏂囨。鎬繪暟R鏉ヤ及綆楋紝pi=ri/R
si浠h〃絎琲涓瘝鍦ㄤ笉鐩稿叧鏂囨。闆嗗悎鍐呭嚭鐜扮殑姒傜巼錛屽彲浠ョ敤鍖呭惈榪欎釜鍗曡瘝鐨勪笉鐩稿叧鏂囨。涓暟ni-ri錛岄櫎浠ヤ笉鐩稿叧鏂囨。鎬繪暟(N-R)鏉ヤ及綆楋紝si=(ni-ri)/(N-R)
鍔犱笂騫蟲粦澶勭悊
log((ri+0.5)/(R-ri+0.5)
/
(ni-ri+0.5)/((N-R)-(ni-ri)+0.5))
鍏跺惈涔夛細瀵逛簬鍚屾椂鍑虹幇鍦ㄧ敤鎴鋒煡璇鍜屾枃妗涓殑鍗曡瘝錛岀瘡鍔犳瘡涓崟璇嶇殑浼板鹼紝鍏跺拰灝辨槸鏂囨。D鍜屾煡璇㈢浉鍏蟲у害閲忓?/div>

BM25妯″瀷
鍦˙IM妯″瀷鐨勫熀紜涓婏紝鑰冭檻浜嗗崟璇嶅湪鏌ヨ涓殑鏉冨煎強鍗曡瘝鍦ㄦ枃妗d腑鐨勬潈鍊鹼紝鎷熷悎鍑虹患鍚堜笂榪拌冭檻鍥犵礌鐨勫叕寮忥紝騫墮氳繃寮曞叆涓浜涚粡楠屽弬鏁?/div>
BM25妯″瀷鏄洰鍓嶆渶鎴愬姛鐨勫唴瀹規帓搴忔ā鍨?/div>
http://hi.csdn.net/attachment/201011/30/0_12911307384w69.gif

k1,k2,K鍧囦負緇忛獙璁劇疆鐨勫弬鏁幫紝fi鏄瘝欏瑰湪鏂囨。涓殑棰戠巼錛?/span>qfi鏄瘝欏瑰湪鏌ヨ涓殑棰戠巼銆?/span>

K1閫氬父涓?/span>1.2錛岄氬父涓?/span>0-1000

K鐨勫艦寮忚緝涓哄鏉?/span>

K=http://hi.csdn.net/attachment/201011/30/0_1291130766F92C.gif 

涓婂紡涓紝dl琛ㄧず鏂囨。鐨勯暱搴︼紝avdl琛ㄧず鏂囨。鐨勫鉤鍧囬暱搴︼紝b閫氬父鍙?/span>0.75
BM25F妯″瀷錛氭槸鍏稿瀷鐨凚M25鏀硅繘綆楁硶
灝嗘枃妗e唴瀹瑰垏鎹㈡垚涓嶅悓鐨勯儴鍒嗭紝涓轟笉鍚岀殑閮ㄥ垎璧嬩簣涓嶅悓鐨勬潈閲?/div>
璇█妯″瀷鏂規硶錛氬熼壌璇煶璇嗗埆棰嗗煙閲囩敤鐨勮璦妯″瀷鎶鏈紝灝嗚璦妯″瀷鍜屼俊鎭绱㈢浉浜掕瀺鍚?/div>
涓烘瘡涓枃妗e緩绔嬩竴涓璦妯″瀷錛岃璦妯″瀷浠h〃浜嗗崟璇嶆垨鑰呭崟璇嶅簭鍒楀湪鏂囨。涓殑鍒嗗竷鎯呭喌
瀵逛簬鏌ヨ涓殑鍗曡瘝鏉ヨ錛屾瘡涓崟璇嶉兘瀵瑰簲涓涓娊鍙栨鐜囷紝灝嗚繖浜涘崟璇嶇殑鎶藉彇姒傜巼鐩鎬箻灝辨槸鏂囨。鐢熸垚鏌ヨ鐨勬諱綋姒傜巼
涓鑸噰鐢?strong>鏁版嵁騫蟲粦鏂瑰紡瑙e喅鏁版嵁紼鐤忛棶棰?/div>
鐢ㄦ埛鎻愪氦鏌ヨQ錛屾枃妗i泦鍚堝唴鎵鏈夋枃妗i兘璁$畻鐢熸垚Q鐨勬鐜囷紝鐒跺悗鎸夌収鐢熸垚姒傜巼鍊肩敱澶у埌灝忔帓搴忥紝灝辨槸鎼滅儲緇撴灉
HMM錛岄殣椹皵縐戝か璇█妯″瀷銆佺浉鍏蟲ā鍨嬨佺炕璇戞ā鍨嬫槸鍦ㄥ熀鏈璦妯″瀷鐨勬敼榪?/div>
璇█妯″瀷媯绱㈡柟娉曟晥鏋滅暐浼樹簬綺捐皟鍙傛暟鐨勫悜閲忕┖闂存ā鍨嬶紝涓嶣M25絳夋鐜囨ā鍨嬫晥鏋滅浉褰?/div>
閫氳繃鐞嗚鎺ㄥ錛屽彲浠ュ緱鍑猴細璇█妯″瀷媯绱㈡柟娉曠殑鎺掑簭鍏徃絎﹀悎姒傜巼妯″瀷鐨勬鐜囨帓搴忓師鐞嗭紝綾諱技鍚戦噺絀洪棿妯″瀷Tf*IDF
鏈哄櫒瀛︿範鎺掑簭
涓轟綍鍏磋搗杈冩櫄錛?/div>
1銆佸叾浠栨ā鍨嬪拰鏂規硶錛岃冭檻鐨勫洜绱犺緝灝戯紝浜哄伐榪涜鍏紡鎷熷悎瀹屽叏鍙錛屾晥鏋滃皻鍙?/div>
2銆佹満鍣ㄥ涔犻渶瑕佸ぇ閲忚緇冩暟鎹紝鐢ㄦ埛鐐瑰嚮璁板綍鍙互褰撳仛鏈哄櫒瀛︿範鏂規硶璁粌鏁版嵁鐨勪竴涓浛浠e搧
鏈哄櫒瀛︿範鎺掑簭緋葷粺鐨?涓楠?/strong>錛?/div>
浜哄伐鏍囨敞璁粌鏁版嵁錛氱敤鎴風偣鍑昏褰曟潵妯℃嫙浜哄伐鎵撳垎鏈哄埗
鏂囨。鐗瑰緛鎶藉彇錛氭煡璇㈣瘝鍦ㄦ枃妗d腑鐨勮瘝棰戙佹煡璇㈣瘝鐨処DF淇℃伅錛岀綉欏靛叆閾炬暟閲忥紝緗戦〉鍑洪摼鏁伴噺錛岀綉欏礟ageRank鍊鹼紝緗戦〉URL闀垮害錛屾煡璇㈣瘝鐨凱roximity鍊鹼紙鏂囨。涓澶х殑紿楀彛鍐呭彲浠ュ嚭鐜版墍鏈夋煡璇㈣瘝錛?/span>
瀛︿範鍒嗙被鍑芥暟
鍦ㄥ疄闄呮悳绱㈢郴緇熶腑閲囩敤鏈哄櫒瀛︿範妯″瀷
鏈哄櫒瀛︿範鏂規硶
1銆佸崟鏂囨。鏂規硶
瀵瑰崟鐙殑涓綃囨枃妗h漿鎹負鐗瑰緛鍚戦噺錛屾満鍣ㄥ涔犵郴緇熸牴鎹粠璁粌鏁版嵁涓涔犲埌鐨勫垎綾繪垨鍥炲綊鍑芥暟瀵規枃妗f墦鍒嗭紝鎵撳垎緇撴灉涓烘渶鍚庡緱鍒?/div>
鍦ㄨ緇冭繃紼嬩腑錛屽綋鎵撳垎澶т簬涓瀹氱殑闃堝鹼紝涓虹浉鍏蟲枃妗o紝鍚﹀垯涓轟笉鐩稿叧鏂囨。銆?/div>
2銆佹枃妗e鏂規硶
閫氳繃璁粌錛屽鏂囨。欏哄簭鍏崇郴鏄惁鍚堢悊榪涜鍒ゆ柇錛屽垽鏂袱涓枃妗g殑寰楀垎
浣跨敤SVM,BOOST,紲炵粡緗戠粶錛岄兘鍙互鍋氫負瀛︿範鏂規硶
緙虹偣錛屽彧鑰冭檻浜嗕袱涓枃妗e鐨勭浉瀵瑰厛鍚庨『搴忥紝鍗存病鏈夎冭檻鏂囨。鍑虹幇鐨勬悳绱㈠垪琛ㄤ腑鐨勪綅緗?/div>
涓嶅悓鐨勬煡璇紝鐩稿叧鏂囨。鏁伴噺宸紓寰堝ぇ錛屽鏈哄櫒瀛︿範緋葷粺鐨勬晥鏋滈犳垚璇勪環鍥伴毦
3銆佹枃妗e垪琛ㄦ柟娉?/strong>
灝嗘瘡涓煡璇㈠搴旂殑鎵鏈夋悳绱㈢粨鏋滃垪琛ㄤ綔涓轟竴涓緇冨疄渚?/div>
閫氳繃鎼滅儲緇撴灉鎺掑垪緇勫悎鐨勬鐜囧垎甯冿紝璁粌璇勫垎鍑芥暟
鎼滅儲璐ㄩ噺璇勪環鏍囧噯錛氬浜庢悳绱㈠紩鎿庢洿鍔犲叧娉ㄧ簿紜巼
綺劇‘鐜囷細鏈鎼滅儲緇撴灉涓浉鍏蟲枃妗f墍鍗?strong>鏈鎼滅儲榪斿洖鐨勬墍鏈夋枃妗?/strong>鐨勬瘮渚?/div>
鎷涘洖鐜囷細鏈鎼滅儲緇撴灉涓浉鍏蟲枃妗e崰鏁翠釜闆嗗悎涓墍鏈夌浉鍏蟲枃妗?/strong>鐨勬瘮渚?/span>
P@10鎸囨爣錛氬湪鎼滅儲緇撴灉鎺掑悕鏈鍏堝墠鐨勫ご10涓枃妗d腑鏈夊澶ф瘮渚嬫槸鐩稿叧鐨?/div>
MAP錛欰P鍏奸【浜嗘帓鍦ㄥ墠鍒楃殑鐩稿叧鎬у拰緋葷粺鎷涙灦鐜囷紝MAP澶氱粍鏌ヨ鐨凙P騫沖潎鍊?/div>

]]>榪欏氨鏄悳绱㈠紩鎿庯紞絎旇瘯4-绱㈠紩鍘嬬緝http://m.shnenglu.com/humanchao/archive/2013/11/04/204083.html鑳℃弧瓚?/dc:creator>鑳℃弧瓚?/author>Mon, 04 Nov 2013 04:56:00 GMThttp://m.shnenglu.com/humanchao/archive/2013/11/04/204083.htmlhttp://m.shnenglu.com/humanchao/comments/204083.htmlhttp://m.shnenglu.com/humanchao/archive/2013/11/04/204083.html#Feedback0http://m.shnenglu.com/humanchao/comments/commentRss/204083.htmlhttp://m.shnenglu.com/humanchao/services/trackbacks/204083.html璇嶅吀鍘嬬緝錛氬噺灝忚瘝鍏哥殑鍐呭瓨鍗犵敤
濂界殑鍘嬬緝綆楁硶錛氬帇緙╃巼錛屽帇緙╅熷害錛岃В鍘嬮熷害錛堟渶閲嶈錛?/div>
涓鍏冪紪鐮?/strong>
10
210
3110
41110
511110
Elias Gamma:
x=2^e+d
e+1:涓鍏冪紪鐮?/div>
d:浜屽厓緙栫爜
Elias Delta:
x=2^e+d
e+1:鍐嶄嬌鐢?span style="font-size: medium; ">Elias Gamma緙栫爜涓嬈?/span>
d:浜屽厓緙栫爜
Golomb & Rice
鍥犲瓙1=(X-1)/b錛屽洜瀛?+1錛屼竴鍏冪紪鐮?/div>
鍥犲瓙2=(X-1) mod b錛屼嬌鐢ㄤ簩鍏冪紪鐮侊紝緙栫爜瀹藉害鍦╨og(b)
Golomb: b=0.69*Avg(搴忓垪騫沖潎鍊?
Rice錛?鐨勬暣鏁版騫傦紝鎵鏈夊皬浜嶢vg涓渶鎺ヨ繎Avg鐨勬暟鍊?/div>
鍙橀暱鍘嬬緝綆楁硶SimpleX
Simple9: 32浣嶆瘮鐗逛綅錛?涓瘮鐗逛負綆$悊鏁版嵁瀛樺偍鍖猴紝28涓瘮鐗瑰帇緙╂暟鎹瓨鍌ㄥ尯
Simple9鐨?8浣嶆湁9縐嶈〃紺哄艦寮?/div>
Simple16: 28浣嶆湁16縐嶈〃紺哄艦寮忥紝騫朵笖閫氳繃闈炲綋欏瑰畬鍏ㄥ浐瀹氶暱搴︼紝瑙e喅鏁版嵁鍖烘湁嫻垂浣嶇殑鎯呭喌
PForDelta錛氱洰鍓嶈В鍘嬮熷害鏈蹇殑涓縐嶅掓帓鏂囦歡鍘嬬緝綆楁硶
1錛屽寰呯紪鐮佺殑榪炵畫K涓暟鍊鹼紙涓鑸負128錛夛紝紜畾10%鐨勫ぇ鏁版暟鍊鹼紝鏍規嵁70%灝忔暟紜畾澶哄彇鐨勬瘮鐗瑰搴︼紝紜畾鏁翠釜搴忓垪
2錛屽鍘熷鏁版嵁閬嶅巻錛屽皢澶ф暟鏀劇疆鍒板熬绔紝騫惰漿鎹㈡垚閾捐〃緇撴瀯鐨勫簭鍒?/div>
3銆佸皢鎵鏈夋暟瀛楀帇緙╁埌闃熷垪涓?/div>
鏂囨。緙栧彿閲嶆帓搴?/strong>
緗戦〉鐨勬枃妗D+鍗曡瘝璇嶉淇℃伅錛屾枃妗D浣跨敤D-Gap榪涜緙栫爜
灝嗗唴瀹硅秺鐩鎬技鐨勭綉欏碉紝鍦ㄧ紪鎺掓枃妗e彿鏃惰秺鐩擱偦
嫻烽噺鏁版嵁鏂囨湰鑱氱被閫熷害杈冩參錛屽皢URL鐩鎬技鐨勭綉欏佃仛鍚堝湪涓璧鳳紝鍋囪鍚屼竴涓綉绔欑殑寰堝欏甸潰琛ㄨ揪鐨勪富棰樺唴瀹規槸榪戜技鐨?/div>
闈欐佺儲寮曡鍓?/strong>錛氫富鍔ㄦ姏寮冧竴閮ㄥ垎涓嶉噸瑕佺殑淇℃伅錛堢儲寮曢」錛夋潵杈懼埌鏁版嵁鍘嬬緝鐨勬晥鏋?/div>
浠ュ崟璇嶄負涓績鐨勭儲寮曡鍓?/strong>錛?/div>
鍒ゆ柇鍗曡瘝涓庢枃妗g殑鐩鎬技鎬э紝姣忎釜璇嶅吀涓殑鍗曡瘝錛屽叾瀵瑰簲鐨勫掓帓鎺掑垪涓嚦灝戜繚鐣橩涓儲寮曢」錛岃繕瑕佷繚鐣欒嫢騫插瘜浣欓」鐩?/div>
瀹為獙璇佹槑錛屽鏋滈鍏堝鎵鏈夌儲寮曢」鐨勫師濮嬪緱鍒嗗噺鍘誨緱鍒嗘渶浣庣儲寮曢」鐨勫緱鍒嗭紝鍐嶉噰鍙栵紙瀵筀涓」榪涜鎶樻墸錛屼箻涓涓姌鎵e洜瀛愶紝寰楀嚭闃堝糰錛屽墿涓嬬殑澶т簬a淇濈暀錛夋柟娉曡繘琛岃鍓紝鏁堟灉浼氬ぇ澶ф彁鍗?/div>
鍥犱負
绱㈠紩欏瑰緱鍒嗗垎宸浉鍏充笉澶э紝姣旇緝闆嗕腑鍦ㄦ煇涓尯闂達紝鎵浠ュ噺鎺夊緱鍒嗘渶浣庨」
浠ユ枃妗d負涓績鐨勭儲寮曡鍓?/strong>錛氭洿涓哄父鐢?/div>
鍦ㄥ緩绔嬬儲寮曚箣鍓嶈繘琛屾暟鎹澶勭悊錛屾妸涓庢枃妗d富棰樿〃杈句笉鐩稿叧鐨勫崟璇嶆姏寮冿紝濡傚仠鐢ㄨ瘝


]]>榪欏氨鏄悳绱㈠紩鎿庯紞絎旇瘯3-鎼滅儲寮曟搸绱㈠紩http://m.shnenglu.com/humanchao/archive/2013/09/16/203260.html鑳℃弧瓚?/dc:creator>鑳℃弧瓚?/author>Mon, 16 Sep 2013 06:01:00 GMThttp://m.shnenglu.com/humanchao/archive/2013/09/16/203260.htmlhttp://m.shnenglu.com/humanchao/comments/203260.htmlhttp://m.shnenglu.com/humanchao/archive/2013/09/16/203260.html#Feedback0http://m.shnenglu.com/humanchao/comments/commentRss/203260.htmlhttp://m.shnenglu.com/humanchao/services/trackbacks/203260.html鍗曡瘝璇嶅吀
1銆佸搱甯屽姞閾捐〃
2銆佹爲褰㈢粨鏋勶細B鏍戞垨鑰匓+鏍?/div>
鍊掓帓鍒楄〃錛?/div>
鍗曡瘝+鏂囨。鍙鳳紝璇嶉錛屽嚭鐜扮殑浣嶇疆
鏂囨。鍙蜂竴鑸噰鐢ㄥ樊鍊煎瓨鍌紝浠ヨ妭鐪佺┖闂?/div>
寤虹珛绱㈠紩
1銆佷袱閬嶆枃妗i亶鍘嗘硶
絎竴閬嶏紝鏀墮泦鍏ㄥ眬緇熻淇℃伅錛屾枃妗f暟N錛屾瘡涓枃妗e寘鍚笉鍚屽崟璇嶆暟M錛屾瘡涓崟璇嶅湪澶氬皯涓枃妗d腑鍑虹幇榪囩殑淇℃伅DF錛岄氳繃榪欎簺淇℃伅鍙互璁$畻鍑烘渶緇堢儲寮曠殑澶у皬
絎簩閬嶏紝鍦ㄥ緩绔嬪ソ鐨勫唴瀛樹腑寤虹珛绱㈠紩錛屼粠紓佺洏璇誨彇鏂囨。騫惰В鏋愭枃妗f槸鏈娑堣楁椂闂寸殑姝ラ
2銆佹帓搴忔硶
濮嬬粓鍦ㄥ唴瀛樹腑鍒嗛厤鍥哄畾澶у皬鐨勭┖闂達紝鐢ㄦ潵瀛樻斁璇嶅吀淇℃伅鍜岀儲寮曚腑闂寸粨鏋滐紝褰撳垎閰嶇┖闂存秷鑰楀厜鐨勬椂鍊欙紝鎶婁腑闂寸粨鏋滃啓鍏ョ鐩橈紝娓呯┖鍐呭瓨鏁版嵁榪涜涓嬩竴杞儲寮?/div>
涓棿緇撴灉鎺掑簭錛屾帓搴忓墠錛屾枃妗D錛屽崟璇岻D錛屽崟璇嶉鐜?/div>
鎺掑簭鍚庯紝鍗曡瘝ID錛堜富閿級錛屾枃妗D錛堟閿級
鍚堝茍涓棿緇撴灉錛屾妸涓棿緇撴灉鏂囦歡榪涜鍚堝茍錛屾寜鍗曡瘝ID鍐欏叆鏈緇堢粨鏋滄枃浠?/div>
3銆佸綊騫舵硶
鍦ㄤ腑闂寸粨鏋滄帓搴忓畬鎴愪互鍚庯紝鎶婂瓧鍏鎬俊鎭篃鍐欏叆鏂囨。涓紝榪欐牱鍏ㄩ浣跨敤鍐呭瓨
鍦ㄥ緩绔嬩腑闂寸儲寮曚腑錛屽疄闄呭崟璇嶏紝鏂囨。緙栧彿錛岃瘝棰?/div>
鍚堝茍鏃訛紝閽堝姣忎釜鍗曡瘝鐨勫掓帓鍒楄〃榪涜鍚堝茍錛屽艦鎴愭渶緇堢殑璇嶅吀淇℃伅
鍔ㄦ佺儲寮?/strong>
鍊掓帓绱㈠紩錛氳瘝鍏稿湪鍐呭瓨閲岋紝鍊掓帓鍒楄〃瀛樺偍鍦ㄧ鐩樻枃浠朵腑
涓存椂绱㈠紩錛氳瘝鍏稿拰鍊掓帓鍒楄〃閮藉湪鍐呭瓨涓紝褰撴湁鏂版枃妗e姞鍏ユ椂錛屾斁鍒頒復鏃剁儲寮曚腑
鍒犻櫎鏂囨。鍒楄〃錛氬綋鏂囨。鍐呭琚洿鏀規椂錛岀郴緇熻涓烘棫鏂囨。琚垹闄わ紝澧炲姞涓綃囨柊鏂囨。
褰撶敤鎴瘋緭鍏ユ煡璇㈡椂錛屽厛浠庢壘鍊掓帓绱㈠紩+涓存椂绱㈠紩錛屽幓鎺夊垹闄ゆ枃妗e垪琛ㄤ腑鐨勬枃妗g粨鏋?/div>
绱㈠紩鏇存柊絳栫暐
1銆佸畬鍏ㄩ噸寤虹瓥鐣ワ細褰撴柊澧炴枃妗h揪鍒頒竴瀹氭暟閲忓悗錛屾柊鑰佺儲寮曞悎騫墮噸寤猴紝閫傚悎灝忔枃妗i泦鍚堬紝涓繪祦鍟嗕笟鎼滅儲寮曟搸涓鑸篃閲囩敤姝ゆ柟寮忔潵緇存姢
2銆佸啀鍚堝茍絳栫暐錛?span style="font-size: medium; ">褰撴柊澧炴枃妗h揪鍒頒竴瀹氭暟閲忓悗錛屾柊鑰佺儲寮曞悎騫墮噸寤猴紝姝ゆ椂鑰佺儲寮曡繕鍦ㄨ浣跨敤錛岀敱浜庤佺儲寮曟湁搴忥紝鎵浠ュ悎騫剁瓥鐣ユ墽琛岃緝蹇紝浣嗘槸璇昏佺儲寮曪紝寤烘柊绱㈠紩錛屼篃闇瑕佽緝澶欼O鏃墮棿錛屾瘮杈冭楁椂
3銆佸師鍦版洿鏂扮瓥鐣ワ細鍦ㄥ緩绔嬭佺儲寮曟椂錛屽湪鑰佺儲寮曞掓帓鍒楄〃涓暀鏈変竴瀹氱殑浣欏湴錛屾柊鍔犲叆绱㈠紩鐩存帴榪藉姞鍒伴鐣欑┖闂達紝瀹為獙鏁版嵁琛ㄦ槑錛屾洿鏂版晥鐜囨瘮鍐嶅悎騫剁瓥鐣ヤ綆
4銆佹販鍚堢瓥鐣ワ細灝嗗崟璇嶆牴鎹笉鍚屾ц川榪涜鍒嗙被錛屽鍏剁儲寮曢噰鍙栦笉鍚岀殑绱㈠紩鏇存柊絳栫暐錛岄暱鍊掓帓鍒楄〃鍗曡瘝閲囧彇鍘熷湴鏇存柊絳栫暐錛堣鍐欏紑閿澶э級錛岀煭鍊掓帓鍒楄〃閲囧彇鍐嶅悎騫剁瓥鐣ワ紙璇誨啓寮閿涓嶇畻澶ぇ錛?/span>

鏌ヨ澶勭悊
1銆佷竴嬈′竴鏂囨。錛屾壘鍒板寘鍚叧閿瓧鐨勬墍鏈夋枃妗i泦鍚堬紝涓嬈¤綆椾竴涓枃妗g殑寰楀垎錛屼緷嬈¤綆楁墍鏈夋枃妗o紝璁$畻鍚庝竴鑸噰鐢ㄤ紭鍏堥槦鍒楀鍒嗘暟榪涜鎺掑簭
2銆佷竴嬈′竴鍗曡瘝錛屼竴嬈¤綆椾竴涓崟璇嶇殑寰楀垎錛屽茍鎶婄粨鏋滀互鏂囨。緙栧啓涓哄叧閿鹼紝浠ash琛ㄥ瓨鍌ㄥ緱鍒嗭紝璁$畻鎵鏈夋枃妗e緱鍒嗗悗錛屽hash琛ㄨ繘琛屾帓搴?/span>
璺寵穬鎸囬拡
鍦ㄥ瓨鍌ㄥ掓帓绱㈠紩鏂囨。緙栧彿鏃訛紝閫氬父浣跨敤璺寵穬鎸囬拡鑺傜渷絀洪棿錛岃煩璺冩寚閽堝垎鍧椾嬌鐢ㄦ牴鍙稬涓洪暱搴︽晥鏋滆緝濂?/div>
澶氬瓧孌電儲寮?/strong>錛氬緗戦〉鐨勪笉鍚屽尯鍩熻繘琛屽瓧孌靛垝鍒嗭紝榪涜绱㈠紩
1銆佸绱㈠紩鏂瑰紡錛屽姣忎釜涓嶅悓鐨勫瓧孌靛垎鍒緩绔嬬儲寮?/div>
2銆佸掓帓鍒楄〃鏂瑰紡錛屾妸瀛楁淇℃伅瀛樺偍鍒板掓帓鍒楄〃欏逛腑
3銆佹墿灞曞垪琛ㄦ柟寮忥紝鎶婃瘡涓瓧孌靛嚭鐜扮殑浣嶇疆璁板綍鍒頒竴寮犲垪琛ㄩ噷錛屽掓帓绱㈠紩鎵懼埌鍗曡瘝鍚庯紝鍒ゆ柇鍗曡瘝鐨勪綅緗槸鍚﹀湪鏌愬瓧孌佃寖鍥翠腑
鐭鏌ヨ錛氭湰璐ㄤ笂鏄浣曞湪绱㈠紩涓淮鎶ゅ崟璇嶉『搴忓叧緋繪垨浣嶇疆淇℃伅
1銆佷綅緗俊鎭儲寮曪紝閫氳繃浣嶇疆淇℃伅鍒ゆ柇涓や釜璇嶆槸鍚︿負鐭鍏崇郴錛岄傚悎甯歌鐭
2銆佸弻璇嶇儲寮曪紝棣栬瘝+涓嬭瘝錛屽彧瀵硅綆椾唬浠烽珮鐨勭煭璇緩绔嬪弻璇嶇儲寮曪紝涓鑸煭璇氳繃甯歌鎵嬫杈懼埌鐩殑
3銆佺煭璇儲寮曪紝緙虹偣鏃犳硶灝嗘墍鏈夌煭璇兘寤哄ソ绱㈠紩錛屼粠鐢ㄦ埛鏌ヨ鏃ュ織鎴栫綉欏墊湰韜寲鎺樼煭璇紝閫傚悎鐑棬鐭
4銆佹販鍚堟柟娉曪紝鐢ㄦ埛鏌ヨ->鐭绱㈠紩->鍙岃瘝绱㈠紩->甯歌绱㈠紩
鍒嗗竷寮忕儲寮曪細澶氬彴鏈哄櫒鍗忎綔瀹屾垚绱㈠紩
1銆佹寜鏂囨。鍒掑垎錛屾瘡鍙版満鍣ㄨ礋璐e鏌愪釜鏂囨。瀛愰泦寤虹珛绱㈠紩
2銆佹寜鍗曡瘝鍒掑垎錛屽皢鍗曡瘝鍒嗗埆浼犻佺粰鏈嶅姟鍣?錛岃綆楃粨鏋滃悗錛屽啀浼犻佺粰鏈嶅姟鍣?錛屼竴嬈′竴鍗曡瘝鐨勬煡璇㈠鐞嗘柟寮?/div>

]]>榪欏氨鏄悳绱㈠紩鎿庯紞絎旇瘯2http://m.shnenglu.com/humanchao/archive/2013/09/13/203210.html鑳℃弧瓚?/dc:creator>鑳℃弧瓚?/author>Fri, 13 Sep 2013 03:10:00 GMThttp://m.shnenglu.com/humanchao/archive/2013/09/13/203210.htmlhttp://m.shnenglu.com/humanchao/comments/203210.htmlhttp://m.shnenglu.com/humanchao/archive/2013/09/13/203210.html#Feedback0http://m.shnenglu.com/humanchao/comments/commentRss/203210.htmlhttp://m.shnenglu.com/humanchao/services/trackbacks/203210.html浜屻佺綉緇滄姄铏?/strong>

緗戦〉欏甸潰鍒掑垎涓?涓儴鍒嗭細
1銆佸凡涓嬭澆
2銆佸凡榪囨湡
3銆佸緟涓嬭澆
4銆佸彲鐭ョ綉欏甸泦鍚堬紝鏈笅杞斤紝浣嗗彲绱㈠紩
5銆佷笉鍙煡緗戦〉闆嗗悎錛屾殫緗戠綉欏?/div>
鐖櫕鍒嗕笁縐嶇被鍨嬶細
1銆佹壒閲忓瀷錛氭湁鏄庣‘鐨勬姄鍙栬寖鍥村拰鐩爣錛屽綋杈懼埌榪欎釜鐩爣鍚庡仠姝㈡姄鍙?/div>
2銆佸閲忓瀷錛氫笉鏂姄鍙栵紝鎶撳彇鍒頒互鍚庡畾鏈熸洿鏂?/div>
3銆佸瀭鐩村瀷錛氭姄鍙栫壒瀹氳涓氱綉欏?/div>
浼樼鐖櫕鐨勭壒鎬э細楂樻ц兘銆佸彲鎵╁睍錛堣壇濂界殑騫跺彂鎬э級銆佸仴澹с佸弸濂芥э紙閬靛畧Robot鍗忚錛?/div>
璇勪環鐖櫕璐ㄩ噺鐨勬爣鍑嗭細瑕嗙洊鐜囷紝鏃舵柊鎬э紝閲嶈鎬?/div>
 
鎶撳彇絳栫暐錛氫紭鍏堥夋嫨閲嶈緗戦〉榪涜鎶撳彇
1銆佸搴︿紭鍏堥亶鍘嗙瓥鐣ワ紝铏界劧鏈烘錛屼絾鏄晥鏋滃ソ錛岄殣鍚簡涓浜涚綉欏典紭縐綰х殑鍋囪
2銆侀潪瀹屽叏PageRank絳栫暐錛屽宸蹭笅杞界綉欏甸泦鍚堬紝鍔犱笂寰呮姄鍙朥RL錛屽艦鎴愮綉欏甸泦鍚堬紝榪涜PageRank璁$畻錛屽皢寰呮姄鍙栨寜寰楀垎榪涜鎺掑簭
3銆丱CIP絳栫暐錛屽湪綰塊〉闈㈤噸瑕佹ц綆楋紝寰呬笅杞介〉闈㈤兘鍒嗛厤鐩稿悓鐨刢ash錛屼笅杞藉悗鎶婇〉闈㈡嫢鏈夌殑鐜伴噾騫沖垎緇欏寘鍚殑閾炬帴錛?/div>
寰呮姄鍙朥RL鍒欐牴鎹墜澶寸幇閲戞帓搴忥紝浼樺厛涓嬭澆鏈鍏呰緗戦〉銆傝綆楅熷害蹇紝閫傚悎瀹炴椂璁$畻錛屾晥鏋滅暐浼樹簬瀹藉害浼樺厛
4銆佸ぇ绔欎紭鍏堢瓥鐣ワ紝鍝釜緗戠珯絳夌瓑涓嬭澆鐨勯〉闈㈡渶澶氾紝鍒欎紭鍏堜笅杞借繖浜涢摼鎺ワ紝鏁堟灉鐣ヤ紭浜庡搴︿紭鍏?/span>

緗戦〉鏇存柊絳栫暐
1銆佸巻鍙插弬鑰冪瓥鐣ワ紝榪囧幓棰戠箒鏇存柊鐨勭綉欏碉紝灝嗘潵涔熶細棰戠箒鏇存柊錛屽埄鐢ㄦ硦鏉捐繃紼?/span>
鎶撳彇絳栫暐搴旇蹇界暐鎺夊箍鍛婃垨瀵艱埅絳夐潪閲嶈鍖哄煙鐨勯綣佸彉鍖栵紝闆嗕腑鍦ㄤ富棰樺唴瀹圭殑鍙樺寲鎺㈡祴鍜屽緩妯?/span>
2銆佺敤鎴蜂綋楠岀瓥鐣ワ紝瀵規悳绱㈢粨鏋滄帓鍚嶉潬鍓嶏紝鏇存柊浠ュ悗瀵規悳绱㈣川閲忥紙鎺掑悕錛夌殑褰卞搷杈冨ぇ鐨勯〉闈㈣繘琛屾洿鏂?/span>
3銆佽仛綾繪娊鏍風瓥鐣ワ紝鍏堝緗戦〉榪涜鑱氱被錛屽鍚屼竴綾葷綉欏甸噰鐢ㄧ浉鍚岀殑鏇存柊棰戠巼
鑱氱被鐗瑰緛錛?/span>
闈欐佺壒寰侊紝欏甸潰鐨勫唴瀹癸紝鍥劇墖鏁伴噺錛岄〉闈㈠ぇ灝忥紝閾炬帴娣卞害錛孭ageRank鍊?/span>
鍔ㄦ佺壒寰侊紝闅忕潃鏃墮棿鐨勫彉鍖?錛岄潤鎬佺壒寰佺殑鍙樺寲鎯呭喌
鑱氱被鎶芥牱絳栫暐鏁堟灉濂戒簬鍓嶈堪涓ょ錛屼絾鏄浜胯緗戦〉榪涜鑱氱被錛岄毦搴﹁緝澶?/span>

鏆楃綉鎶撳彇
灝嗘殫緗戞暟鎹粠鏁版嵁搴撲腑鎸栨帢鍑烘潵錛岀櫨搴︾殑“闃挎媺涓?#8221;璁″垝灝辨槸瑙e喅姝ら棶棰?/span>
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]]>杞? 鎬庢牱閲忓寲璇勪環鎼滅儲寮曟搸鐨勭粨鏋滆川閲?/title><link>http://m.shnenglu.com/humanchao/archive/2012/12/19/196436.html</link><dc:creator>鑳℃弧瓚?/dc:creator><author>鑳℃弧瓚?/author><pubDate>Wed, 19 Dec 2012 03:03:00 GMT</pubDate><guid>http://m.shnenglu.com/humanchao/archive/2012/12/19/196436.html</guid><wfw:comment>http://m.shnenglu.com/humanchao/comments/196436.html</wfw:comment><comments>http://m.shnenglu.com/humanchao/archive/2012/12/19/196436.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.shnenglu.com/humanchao/comments/commentRss/196436.html</wfw:commentRss><trackback:ping>http://m.shnenglu.com/humanchao/services/trackbacks/196436.html</trackback:ping><description><![CDATA[<h2>杞嚜錛?a >http://www.infoq.com/cn/articles/cyw-evaluate-seachengine-result-quality</a><br /><br />鍓嶈█</h2><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鎼滅儲璐ㄩ噺璇勪及鏄悳绱㈡妧鏈爺絀剁殑鍩虹鎬у伐浣滐紝涔熸槸鏍稿績宸ヤ綔涔嬩竴銆傝瘎浠鳳紙Metrics錛夊湪鎼滅儲鎶鏈爺鍙戜腑鎵紨鐫閲嶈瑙掕壊錛屼互鑷充簬浠諱綍涓縐嶆柊鏂規硶涓庝粬浠殑璇勪環鏂瑰紡鏄瀺涓轟竴浣撶殑銆?/p><div style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><br />鎼滅儲寮曟搸緇撴灉鐨勫ソ鍧忎笌鍚︼紝浣撶幇鍦ㄤ笟鐣屾墍縐扮殑鍦ㄧ浉鍏蟲э紙Relevance錛変笂銆傜浉鍏蟲х殑瀹氫箟鍖呮嫭鐙箟鍜屽箍涔変袱鏂歸潰錛岀嫮涔夌殑瑙i噴鏄細媯绱㈢粨鏋滃拰鐢ㄦ埛鏌ヨ鐨勭浉鍏崇▼搴︺傝屼粠騫夸箟鐨勫眰闈紝鐩稿叧鎬у彲浠ョ悊瑙d負涓虹敤鎴鋒煡璇㈢殑緇煎悎婊℃剰搴︺傜洿瑙傜殑鏉ョ湅錛屼粠鐢ㄦ埛榪涘叆鎼滅儲妗嗙殑閭d竴鍒昏搗錛屽埌闇姹傝幏寰楁弧瓚充負姝紝榪欎箣闂寸粡鍘嗙殑榪囩▼瓚婇『鐣咃紝瓚婁究鎹鳳紝鎼滅儲鐩稿叧鎬у氨瓚婂ソ銆傛湰鏂囨葷粨涓氱晫甯哥敤鐨勭浉鍏蟲ц瘎浠鋒寚鏍囧拰閲忓寲璇勪環鏂規硶銆備緵瀵規鎰熷叴瓚g殑鏈嬪弸鍙傝冦?/div><h2>Cranfield璇勪環浣撶郴</h2><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">A Cranfield-like approach榪欎釜鍚嶇О鏉ユ簮浜庤嫳鍥紺ranfield University錛屽洜涓哄湪浜屽崄涓栫邯浜斿崄騫翠唬璇ュぇ瀛﹂鍏堟彁鍑轟簡榪欐牱涓濂楄瘎浠風郴緇燂細鐢辨煡璇㈡牱渚嬮泦銆佹紜瓟妗堥泦銆佽瘎嫻嬫寚鏍囨瀯鎴愮殑瀹屾暣璇勬祴鏂規錛屽茍浠庢紜珛浜?#8220;璇勪環”鍦ㄤ俊鎭绱㈢爺絀朵腑鐨勬牳蹇冨湴浣嶃?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">Cranfield璇勪環浣撶郴鐢變笁涓幆鑺傜粍鎴愶細</p><ol style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><li>鎶藉彇浠h〃鎬х殑鏌ヨ璇嶏紝緇勬垚涓涓妯¢傚綋鐨勯泦鍚?/li><li>閽堝鏌ヨ鏍蜂緥闆嗗悎錛屼粠媯绱㈢郴緇熺殑璇枡搴撲腑瀵繪壘瀵瑰簲鐨勭粨鏋滐紝榪涜鏍囨敞錛堥氬父浜哄伐榪涜錛?/li><li>灝嗘煡璇㈣瘝鍜屽甫鏈夋爣娉ㄤ俊鎭殑璇枡搴撹緭鍏ユ绱㈢郴緇燂紝瀵圭郴緇熷弽棣堢殑媯绱㈢粨鏋滐紝浣跨敤棰勫畾涔夊ソ鐨勮瘎浠瘋綆楀叕寮忥紝鐢ㄦ暟鍊煎寲鐨勬柟娉曟潵璇勪環媯绱㈢郴緇熺粨鏋滃拰鏍囨敞鐨勭悊鎯崇粨鏋滅殑鎺ヨ繎紼嬪害</li></ol><h2>鏌ヨ璇嶉泦鍚堢殑閫夊彇</h2><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">Cranfield璇勪環緋葷粺鍦ㄥ悇澶ф悳绱㈠紩鎿庡叕鍙稿唴鏈夊箍娉涚殑搴旂敤銆傚叿浣撳簲鐢ㄦ椂錛岄鍏堥渶瑕佽В鍐崇殑闂鏄瀯閫犱竴涓祴璇曠敤鏌ヨ璇嶉泦鍚堛?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鎸夌収Andrei Broder錛堟浘鍦ˋltaVista/IBM/Yahoo浠昏亴錛夌殑鐮旂┒錛屾煡璇㈣瘝鍙垎涓?綾伙細瀵誨潃綾繪煡璇紙Navigational錛夈佷俊鎭被鏌ヨ(Informational)銆佷簨鍔$被鏌ヨ(Transactional)銆傚搴旂殑姣斾緥鍒嗗埆涓?/p><pre style="overflow: auto; width: 964.25px; padding: 0px 0px 5px; font-size: 12px; line-height: 15px; font-family: 'Courier New', Courier; color: #222222; margin-top: 0px; margin-bottom: 0px; background-color: #fafafa; border: 2px solid #efefef; ">Navigational 錛?12.3% Informational 錛?62.0% Transactional 錛?25.7% </pre><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">涓轟簡浣垮緱璇勪及絎﹀悎綰夸笂瀹為檯鎯呭喌錛岄氬父鏌ヨ璇嶉泦鍚堜篃浼氭寜姣斾緥榪涜閫夊彇銆傞氬父浠庣嚎涓婄敤鎴風殑Query Log鏂囦歡涓嚜鍔ㄦ娊鍙栥?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; 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line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image1.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image2.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image3.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image4.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image5.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image6.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><h2>Precision-recall錛堝噯紜巼-鍙洖鐜囨柟娉曪級</h2><h3>璁$畻鏂規硶</h3><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">淇℃伅媯绱㈤鍩熸渶騫夸負浜虹煡鐨勮瘎浠鋒寚鏍囦負Precision-Recall錛堝噯紜巼-鍙洖鐜囷級鏂規硶銆傝鏂規硶浠庢彁鍑鴻嚦浠婂凡緇忓巻鍗婁釜涓栫邯錛岃嚦浠婂湪寰堝鎼滅儲寮曟搸鍏徃鐨勬晥鏋滆瘎浼頒腑浣跨敤銆?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">欏懼悕鎬濅箟錛岃繖涓柟娉曠敱鍑嗙‘鐜囧拰鍙洖鐜囪繖涓や釜鐩鎬簰鍏寵仈鐨勭粺璁¢噺鏋勬垚錛氬彫鍥炵巼錛圧ecall錛夎 閲忎竴涓煡璇㈡悳绱㈠埌鎵鏈夌浉鍏蟲枃妗g殑鑳藉姏錛岃屽噯紜巼錛圥recision錛夎 閲忔悳绱㈢郴緇熸帓闄や笉鐩稿叧鏂囨。鐨勮兘鍔涖傦紙閫氫織鐨勮В閲婁竴涓嬶細鍑嗙‘鐜囧氨鏄畻涓綆椾綘鏌ヨ寰楀埌鐨勭粨鏋滀腑鏈夊灝戞槸闈犺氨鐨勶紱鑰屽彫鍥炵巼琛ㄧず鎵鏈夐潬璋辯殑緇撴灉涓紝鏈夊灝戣浣犵粰鎵懼洖鏉ヤ簡錛夈傝繖涓ら」鏄瘎浠鋒悳绱㈡晥鏋滅殑鏈鍩虹鎸囨爣錛屽叾鍏蜂綋鐨勮綆楁柟娉曞涓嬨?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">Precision-recall鏂規硶鍋囧畾瀵逛竴涓粰瀹氱殑鏌ヨ錛屽搴斾竴涓媯绱㈢殑鏂囨。闆嗗悎鍜屼竴涓笉鐩稿叧鐨勬枃妗i泦鍚堛傝繖閲岀浉鍏蟲ц鍋囪涓轟簩鍏冪殑錛岀敤鏁板褰㈠紡鍖栨柟娉曟潵鎻忚堪錛屽垯鏄細</p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">A琛ㄧず鐩稿叧鏂囨。闆嗗悎</p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><span style="text-decoration: overline; ">A</span>琛ㄧず涓嶇浉鍏抽泦鍚?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">B琛ㄧず琚绱㈠埌鐨勬枃妗i泦鍚?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><span style="text-decoration: overline; ">B</span>琛ㄧず鏈媯绱㈠埌鐨勬枃妗i泦鍚?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鍒欏崟嬈℃煡璇㈢殑鍑嗙‘鐜囧拰鍙洖鐜囧彲浠ョ敤涓嬭堪鍏紡鏉ヨ〃杈撅細</p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img alt="" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image7.jpg" _href="img://image7.jpg" _p="true" style="border: 0px; " /></p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">錛堣繍綆楃∩ 琛ㄧず涓や釜闆嗗悎鐨勪氦闆嗐倈x|絎﹀彿琛ㄧず闆嗗悎x涓殑鍏冪礌鏁伴噺錛?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">浠庝笂闈㈢殑瀹氫箟涓嶉毦鐪嬪嚭錛屽彫鍥炵巼鍜屽噯紜巼鐨勫彇鍊艱寖鍥村潎鍦╗0,1]涔嬮棿銆傞偅涔堜笉闅炬兂璞★紝濡傛灉榪欎釜緋葷粺鎵懼洖鐨勭浉鍏寵秺澶氾紝閭d箞鍙洖鐜囪秺楂橈紝濡傛灉鐩稿叧緇撴灉鍏ㄩ儴閮界粰鍙洖浜嗭紝閭d箞recall姝ゆ椂灝辯瓑浜?.0銆?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "></p><table cellspacing="0" cellpadding="0" border="1" style="color: #000000; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; text-align: start; background-color: #ffffff; "><tbody><tr><td width="156" valign="top" style="font-size: small; "> </td><td width="156" valign="top" style="font-size: small; "><p align="center">鐩稿叧鐨?/p></td><td width="156" valign="top" style="font-size: small; "><p align="center">涓嶇浉鍏?/p></td></tr><tr><td width="156" valign="top" style="font-size: small; "><p align="center">琚绱㈠埌</p></td><td width="156" valign="top" style="font-size: small; "><p align="center">A∩ B</p></td><td width="156" valign="top" style="font-size: small; "><p align="center"><span style="text-decoration: overline; ">A</span>∩ B</p></td></tr><tr><td width="156" valign="top" style="font-size: small; "><p align="center">鏈媯绱㈠埌</p></td><td width="156" valign="top" style="font-size: small; "><p align="center">A∩<span style="text-decoration: overline; ">B</span></p></td><td width="156" valign="top" style="font-size: small; "><p align="center"><span style="text-decoration: overline; ">A</span>∩<span style="text-decoration: overline; ">B</span></p></td></tr></tbody></table><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "></p><h3>Precision-Recall鏇茬嚎</h3><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鍙洖鐜囧拰鍑嗙‘鐜囧垎鍒弽鏄犱簡媯绱㈢郴緇熺殑涓や釜鏈閲嶈鐨勪晶闈紝鑰岃繖涓や釜渚ч潰鍙堢浉浜掑埗綰︺傚洜涓哄ぇ瑙勬ā鏁版嵁闆嗗悎涓紝濡傛灉鏈熸湜媯绱㈠埌鏇村鐩稿叧鐨勬枃妗o紝蹇呯劧闇瑕?#8220;鏀懼”媯绱㈡爣鍑嗭紝鍥犳浼氬鑷翠竴浜涗笉鐩稿叧緇撴灉娣瘋繘鏉ワ紝浠庤屼嬌鍑嗙‘鐜囧彈鍒板獎鍝嶃傜被浼肩殑錛屾湡鏈涙彁楂樺噯紜巼錛屽皢涓嶇浉鍏蟲枃妗e敖閲忓幓闄ゆ椂錛屽姟蹇呰鎵ц鏇?#8220;涓ユ牸”鐨勬绱㈢瓥鐣ワ紝榪欐牱涔熶細浣夸竴浜涚浉鍏崇殑鏂囨。琚帓闄ゅ湪澶栵紝浣垮彫鍥炵巼涓嬮檷銆?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鎵浠ヤ負浜嗘洿娓呮櫚鐨勬弿榪頒袱鑰呴棿鐨勫叧緋伙紝閫氬父鎴戜滑灝哖recison-Recall鐢ㄦ洸綰跨殑鏂瑰紡緇樺埗鍑烘潵錛屽彲浠ョ畝縐頒負P-R diagram銆傚父瑙佺殑褰㈠紡濡備笅鍥炬墍紺恒傦紙閫氬父鏇茬嚎鏄竴涓愭鍚戜笅鐨勮蛋鍔匡紝鍗抽殢鐫Recall鐨勬彁楂橈紝Precision閫愭闄嶄綆錛?/p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image8.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><h3>P-R鐨勫叾瀹冨艦鎬?/h3><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">涓浜涚壒瀹氭悳绱㈠簲鐢紝浼氭洿鍏蟲敞鎼滅儲緇撴灉涓敊璇殑緇撴灉銆備緥濡傦紝鎼滅儲寮曟搸鐨勫弽浣滃紛緋葷粺錛圓nti-Spam System錛変細鏇村叧娉ㄦ绱㈢粨鏋滀腑娣峰叆浜嗗灝戞潯浣滃紛緇撴灉銆傚鏈晫鎶婅繖浜涢敊璇粨鏋滅О浣滃亣闃蟲э紙False Positive錛夌粨鏋滐紝瀵硅繖浜涘簲鐢紝閫氬父閫夋嫨鐢ㄨ櫄鎶ョ巼錛團allout錛夋潵緇熻錛?/p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img alt="" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image9.jpg" _href="img://image9.jpg" _p="true" style="border: 0px; " /></p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">Fallout鍜孭resion鏈川鏄畬鍏ㄧ浉鍚岀殑銆傚彧鏄垎鍒粠姝e弽涓ゆ柟闈㈡潵璁$畻銆傚疄闄呬笂鏄疨-R鐨勪竴涓彉縐嶃?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鍐嶅洖鍒頒笂鍥撅紝Presion-Recall鏄竴涓洸綰匡紝鐢ㄦ潵姣旇緝涓や釜鏂規硶鐨勬晥鏋滃線寰涓嶅鐩磋錛岃兘涓嶈兘瀵逛袱鑰呰繘琛岀患鍚堬紝鐩存帴鍙嶆槧鍒頒竴涓暟鍊間笂鍛紵涓烘IR瀛︽湳鐣屾彁鍑轟簡F鍊煎害閲忥紙F -Measure錛夌殑鏂規硶銆侳-Measure閫氳繃Presion鍜孯ecall鐨勮皟鍜屽鉤鍧囨暟鏉ヨ綆楋紝鍏紡涓猴細</p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image10.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鍏朵腑鍙傛暟λε(0,1)璋冭妭緋葷粺瀵筆recision鍜孯ecall鐨勫鉤琛$▼搴︺傦紙閫氬父鍙?#955;=0.5錛屾鏃?nbsp;<img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image11-1.jpg" alt="" style="border: 0px; " />錛?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">榪欓噷浣跨敤璋冨拰騫沖潎鏁拌屼笉鏄氬父鐨勫嚑浣曞鉤鍧囨垨綆楁湳騫沖潎錛屽師鍥犳槸璋冨拰騫沖潎鏁板己璋冭緝灝忔暟鍊肩殑閲嶈鎬э紝鑳芥晱鎰熺殑鍙嶆槧灝忔暟瀛楃殑鍙樺寲錛屽洜姝ゆ洿閫傚悎鐢ㄦ潵鍙嶆槧媯绱㈡晥鏋溿?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">浣跨敤F Measure鐨勫ソ澶勬槸鍙渶瑕佷竴涓崟涓鐨勬暟瀛楀氨鍙互鎬葷粨緋葷粺鐨勬绱㈡晥鏋滐紝渚夸簬姣旇緝涓嶅悓鎼滅儲緋葷粺鐨勬暣浣撴晥鏋溿?/p><h2>P@N鏂規硶</h2><h3>鐐瑰嚮鍥犵礌</h3><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">浼犵粺鐨凱recision-Recall騫朵笉瀹屽叏閫傜敤瀵規悳绱㈠紩鎿庣殑璇勪及錛屽師鍥犳槸鎼滅儲寮曟搸鐢ㄦ埛鐨勭偣鍑繪柟寮忔湁鍏剁壒孌婃э紝鍖呮嫭錛?/p><pre style="overflow: auto; width: 964.25px; padding: 0px 0px 5px; font-size: 12px; line-height: 15px; font-family: 'Courier New', Courier; color: #222222; margin-top: 0px; margin-bottom: 0px; background-color: #fafafa; border: 2px solid #efefef; ">A 60-65%鐨勬煡璇㈢偣鍑諱簡鍚嶅垪鎼滅儲緇撴灉鍓?0鏉$殑緗戦〉錛? B 20-25%鐨勪漢浼氳冭檻鐐瑰嚮鍚嶅垪11鍒?0鐨勭綉欏碉紱 C 浠呮湁3-4%鐨勪細鐐瑰嚮鍚嶅垪鎼滅儲緇撴灉涓垪絎?1鍒扮30鍚嶇殑緗戦〉 </pre><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">涔熷氨鏄錛岀粷澶ч儴鍒嗙敤鎴鋒槸涓嶆効鎰忕炕欏靛幓鐪嬫悳绱㈠紩鎿庣粰鍑虹殑鍚庨潰鐨勭粨鏋溿?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鑰屽嵆浣垮湪鎼滅儲緇撴灉鐨勯欏碉紙閫氬父鍒楀嚭鐨勬槸鍓?0鏉$粨鏋滐級錛岀敤鎴風殑鐐瑰嚮琛屼負涔熷緢鏈夋剰鎬濓紝鎴戜滑閫氳繃涓嬮潰鐨凣oogle鐐瑰嚮鐑浘錛圚eat Map錛夋潵瑙傚療錛堣繖涓儹鍥懼湪浜岀淮鎼滅儲緇撴灉欏典笂閫氳繃鍏夎氨鏉ュ艦璞$殑琛ㄨ揪涓嶅悓浣嶇疆鐢ㄦ埛鐨勭偣鍑葷儹搴︺傞鑹茬害闈犺繎綰㈣壊琛ㄧず鐐瑰嚮寮哄害瓚婇珮錛夛細</p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image12.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">浠庡浘涓彲浠ョ湅鍑猴紝鎼滅儲緇撴灉鐨勫墠3鏉″惛寮曚簡澶ч噺鐨勭偣鍑伙紝灞炰簬鐑害鏈楂樼殑閮ㄥ垎銆備篃灝辨槸璇達紝瀵規悳鑻忓紩鎿庢潵璇達紝鏈鍓嶇殑鍑犳潯緇撴灉鏄渶鍏抽敭鐨勶紝鍐沖畾浜嗙敤鎴風殑婊℃剰紼嬪害銆?/p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image13.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">搴蜂箖灝斿ぇ瀛︾殑鐮旂┒浜哄憳閫氳繃eye tracking瀹為獙鑾峰緱浜嗘洿涓虹簿紜殑Google鎼滅儲緇撴灉鐨勭敤鎴瘋涓哄垎鏋愬浘銆備粠榪欏紶鍥句腑鍙互鐪嬪嚭錛岀涓鏉$粨鏋滆幏寰椾簡56.38%鐨勬悳绱㈡祦閲忥紝絎簩鏉″拰絎笁鏉$粨鏋滅殑鎺掑悕渚濇闄嶄綆錛屼絾榪滀綆浜庢帓鍚嶇涓鐨勭粨鏋溿傚墠涓夋潯緇撴灉鐨勭偣鍑繪瘮渚嬪ぇ綰︿負11:3:2 銆傝屽墠涓夋潯緇撴灉鐨勬葷偣鍑誨嚑涔庡垎嫻佷簡鎼滅儲嫻侀噺鐨?0%銆?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鍙﹀鐨勪竴浜涙湁瓚g殑緇撹鏄紝鐐瑰嚮閲忓茍涓嶆槸鎸夌収欏哄簭渚濇閫掑噺鐨勩傛帓鍚嶇涓冧綅鑾峰緱鐨勭偣鍑繪槸鏈灝戠殑錛屽師鍥犲彲鑳藉湪浜庣敤鎴峰湪嫻忚榪囩▼涓笅鎷夐〉闈㈠埌搴曢儴錛岃繖鏃跺欏氨鍙樉紺烘渶鍚庝笁浣嶆帓鍚嶇綉绔欙紝絎竷鍚嶄究瀹規槗琚拷鐣ャ傝岄灞忔渶鍚庝竴涓粨鏋滆幏寰楃殑娉ㄦ剰鍔涳紙2.55錛夋槸澶т簬鍊掓暟絎簩浣嶇殑(1.45)錛屽師鍥犳槸鐢ㄦ埛鍦ㄧ炕欏靛墠錛屽鏈鍚庝竴鏉$粨鏋滃嵃璞$浉瀵硅緝娣便傛悳绱㈢粨鏋滈〉闈㈢浜岄〉鎺掑悕絎竴鐨勭綉欏碉紙鍗蟲繪帓鍚?1浣嶇殑緇撴灉錛夋墍鑾峰緱鐨勭偣鍑誨彧鏈夐欏墊帓鍚嶇鍗佺綉绔欑殑40%錛屼笌棣栭〉鐨勭涓鏉$粨鏋滅浉姣旓紝鏇存槸鍙湁鍏?/60鑷?/100鐨勭偣鍑婚噺銆?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鍥犳鍦ㄩ噺鍖栬瘎浼版悳绱㈠紩鎿庣殑鏁堟灉鏃訛紝寰寰闇瑕佹牴鎹互涓婃悳绱㈢敤鎴風殑琛屼負鐗圭偣錛岃繘琛岄拡瀵規х殑璁捐銆?/p><h3>P@N鐨勮綆楁柟娉?/h3><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">P@N鏈韓鏄疨recision@N鐨勭畝縐幫紝鎸囩殑鏄鐗瑰畾鐨勬煡璇紝鑰冭檻浣嶇疆鍥犵礌錛屾嫻嬪墠N鏉$粨鏋滅殑鍑嗙‘鐜囥備緥濡傚鍗曟鎼滅儲鐨勭粨鏋滀腑鍓?綃囷紝濡傛灉鏈?綃囦負鐩稿叧鏂囨。錛屽垯P@5 = 4/5 = 0.8 銆?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">嫻嬭瘯閫氬父浼氫嬌鐢ㄤ竴涓煡璇㈤泦鍚堬紙鎸夌収鍓嶆枃鎵榪版柟娉曟瀯閫狅級錛屽寘鍚嫢騫叉潯涓嶅悓鐨勬煡璇㈣瘝錛屽湪瀹為檯浣跨敤P@N榪涜璇勪及鏃訛紝閫氬父浣跨敤鎵鏈夋煡璇㈢殑P@N鏁版嵁錛岃綆楃畻鏈鉤鍧囧鹼紝鐢ㄦ潵璇勫垽璇ョ郴緇熺殑鏁翠綋鎼滅儲緇撴灉璐ㄩ噺銆?/p><h3>N鐨勯夊彇</h3><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">瀵圭敤鎴鋒潵璇達紝閫氬父鍙叧娉ㄦ悳绱㈢粨鏋滄渶鍓嶈嫢騫叉潯緇撴灉錛屽洜姝ら氬父鎼滅儲寮曟搸鐨勬晥鏋滆瘎浼板彧鍏蟲敞鍓?銆佹垨鑰呭墠3緇撴灉錛屾墍浠ユ垜浠父鐢ㄧ殑N鍙栧間負P@3鎴朠@5絳夈?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">瀵逛竴浜涚壒瀹氱被鍨嬬殑鏌ヨ搴旂敤錛屽瀵誨潃綾葷殑鏌ヨ錛圢avigational Search錛夛紝鐢變簬鐩爣緇撴灉鏋佷負鏄庣‘錛屽洜姝ゅ湪璇勪及鏃訛紝浼氶夋嫨N=1錛堝嵆浣跨敤P@1錛夈備婦涓緥瀛愭潵璇達紝鎼滅儲“鏂版氮緗?#8221;銆佹垨“鏂版氮棣栭〉”錛屽鏋滈鏉$粨鏋滀笉鏄?鏂版氮緗戯紙url錛?a style="color: #0b59b2; ">www.sina.com.cn</a>錛夛紝鍒欑洿鎺ュ垽璇ユ鏌ヨ綺懼害涓嶆弧瓚抽渶姹傦紝鍗砅@1=0</p><h2>MRR</h2><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">涓婅堪鐨凱@N鏂規硶錛屾槗浜庤綆楀拰鐞嗚В銆備絾緇嗗績鐨勮鑰呬竴瀹氫細鍙戠幇闂錛屽氨鏄湪鍓峃緇撴灉涓紝鎺掑簭絎?浣嶅拰絎琋浣嶇殑緇撴灉錛屽鍑嗙‘鐜囩殑褰卞搷鏄竴鏍風殑銆備絾瀹為檯鎯呭喌鏄紝鎼滅儲寮曟搸鐨勮瘎浠鋒槸鍜屾帓搴忎綅緗瀬涓虹浉鍏崇殑銆傚嵆鎺掔涓鐨勭粨鏋滈敊璇紝鍜岀10浣嶇殑緇撴灉閿欒錛屽叾涓ラ噸紼嬪害鏈夊ぉ澹や箣鍒傚洜姝ゅ湪璇勪環緋葷粺涓紝闇瑕佸紩鍏ヤ綅緗繖涓洜绱犮?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">MRR鏄鉤鍧囨帓搴忓掓暟錛圡ean Reciprocal Rank錛夌殑綆縐幫紝MRR鏂規硶涓昏鐢ㄤ簬瀵誨潃綾繪绱紙Navigational Search錛夋垨闂瓟綾繪绱紙Question Answering錛夛紝榪欎簺媯绱㈡柟娉曞彧闇瑕佷竴涓浉鍏蟲枃妗o紝瀵瑰彫鍥炵巼涓嶆晱鎰燂紝鑰屾槸鏇村叧娉ㄦ悳绱㈠紩鎿庢绱㈠埌鐨勭浉鍏蟲枃妗f槸鍚︽帓鍦ㄧ粨鏋滃垪琛ㄧ殑鍓嶉潰銆侻RR鏂規硶棣栧厛璁$畻姣忎竴涓煡璇㈢殑絎竴涓浉鍏蟲枃妗d綅緗殑鍊掓暟錛岀劧鍚庡皢鎵鏈夊掓暟鍊兼眰騫沖潎銆備緥濡備竴涓寘鍚笁涓煡璇㈣瘝鐨勬祴璇曢泦錛屽墠5緇撴灉鍒嗗埆涓猴細</p><pre style="overflow: auto; width: 964.25px; padding: 0px 0px 5px; font-size: 12px; line-height: 15px; font-family: 'Courier New', Courier; color: #222222; margin-top: 0px; margin-bottom: 0px; background-color: #fafafa; border: 2px solid #efefef; ">鏌ヨ涓緇撴灉錛?.AN 2.AR 3.AN 4.AN 5.AR 鏌ヨ浜岀粨鏋滐細1.AN 2.AR 3.AR 4.AR 5.AN 鏌ヨ涓夌粨鏋滐細1.AR 2.AN 3.AN 4.AN 5.AR </pre><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鍏朵腑AN琛ㄧず涓嶇浉鍏崇粨鏋滐紝AR琛ㄧず鐩稿叧緇撴灉銆傞偅涔堢涓涓煡璇㈢殑鎺掑簭鍊掓暟錛圧eciprocal Rank錛塕R<sub>1</sub> = 1/2=0.5 錛涚浜屼釜緇撴灉RR<sub>2</sub> = 1/2 = 0.5 錛?娉ㄦ剰鍊掓暟鐨勫間笉鍙橈紝鍗充嬌鏌ヨ浜岃幏寰楃殑鐩稿叧緇撴灉鏇村銆傚悓鐞嗭紝RR<sub>3</sub>= 1/1 = 1銆?瀵逛簬榪欎釜嫻嬭瘯闆嗗悎錛屾渶緇圡RR=錛圧R<sub>1</sub>+RR<sub>2</sub>+RR<sub>3</sub>錛? 3 = 0.67</p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鐒惰屽澶ч儴鍒嗘绱㈠簲鐢ㄦ潵璇達紝鍙湁涓鏉$粨鏋滄棤娉曟弧瓚抽渶姹傦紝瀵硅繖縐嶆儏鍐碉紝闇瑕佹洿鍚堥傜殑鏂規硶鏉ヨ綆楁晥鏋滐紝鍏朵腑鏈甯哥敤鐨勬槸涓嬭堪MAP鏂規硶銆?/p><h2>MAP</h2><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">MAP鏂規硶鏄疢ean Average Precison錛屽嵆騫沖潎鍑嗙‘鐜囨硶鐨勭畝縐般傚叾瀹氫箟鏄眰姣忎釜鐩稿叧鏂囨。媯绱㈠嚭鍚庣殑鍑嗙‘鐜囩殑騫沖潎鍊鹼紙鍗矨verage Precision錛夌殑綆楁湳騫沖潎鍊鹼紙Mean錛夈傝繖閲屽鍑嗙‘鐜囨眰浜嗕袱嬈″鉤鍧囷紝鍥犳縐頒負Mean Average Precision銆傦紙娉細娌″彨Average Average Precision涓鏄洜涓洪毦鍚紝浜屾槸鍥犱負鏃犳硶鍖哄垎涓ゆ騫沖潎鐨勬剰涔夛級</p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">MAP 鏄弽鏄犵郴緇熷湪鍏ㄩ儴鐩稿叧鏂囨。涓婃ц兘鐨勫崟鍊兼寚鏍囥傜郴緇熸绱㈠嚭鏉ョ殑鐩稿叧鏂囨。瓚婇潬鍓?rank 瓚婇珮)錛孧AP灝卞簲璇ヨ秺楂樸傚鏋滅郴緇熸病鏈夎繑鍥炵浉鍏蟲枃妗o紝鍒欏噯紜巼榛樿涓?銆?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">渚嬪錛氬亣璁炬湁涓や釜涓婚錛?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">涓婚1鏈?涓浉鍏崇綉欏碉紝涓婚2鏈?涓浉鍏崇綉欏點?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鏌愮郴緇熷浜庝富棰?媯绱㈠嚭4涓浉鍏崇綉欏碉紝鍏秗ank鍒嗗埆涓?, 2, 4, 7錛?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">瀵逛簬涓婚2媯绱㈠嚭3涓浉鍏崇綉欏碉紝鍏秗ank鍒嗗埆涓?,3,5銆?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">瀵逛簬涓婚1錛屽鉤鍧囧噯紜巼MAP璁$畻鍏紡涓猴細</p><pre style="overflow: auto; width: 964.25px; padding: 0px 0px 5px; font-size: 12px; line-height: 15px; font-family: 'Courier New', Courier; color: #222222; margin-top: 0px; margin-bottom: 0px; background-color: #fafafa; border: 2px solid #efefef; ">(1/1+2/2+3/4+4/7)/4=0.83銆?</pre><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">瀵逛簬涓婚2錛屽鉤鍧囧噯紜巼MAP璁$畻鍏紡涓猴細</p><pre style="overflow: auto; width: 964.25px; padding: 0px 0px 5px; font-size: 12px; line-height: 15px; font-family: 'Courier New', Courier; color: #222222; margin-top: 0px; margin-bottom: 0px; background-color: #fafafa; border: 2px solid #efefef; ">(1/1+2/3+3/5+0+0)/5=0.45銆?</pre><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鍒橫AP= (0.83+0.45)/2=0.64銆?#8221;</p><h2>DCG鏂規硶</h2><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">DCG鏄嫳鏂嘍iscounted cumulative gain鐨勭畝縐幫紝涓枃鍙炕璇戜負“鎶樻墸澧炵泭鍊?#8221;銆侱CG鏂規硶鐨勫熀鏈濇兂鏄細</p><ol style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><li>姣忔潯緇撴灉鐨勭浉鍏蟲у垎絳夌駭鏉ヨ 閲?/li><li>鑰冭檻緇撴灉鎵鍦ㄧ殑浣嶇疆錛屼綅緗秺闈犲墠鐨勫垯閲嶈紼嬪害瓚婇珮</li><li>絳夌駭楂橈紙鍗沖ソ緇撴灉錛夌殑緇撴灉浣嶇疆瓚婇潬鍓嶅垯鍊煎簲璇ヨ秺楂橈紝鍚﹀垯緇欎簣鎯╃綒</li></ol><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鎴戜滑棣栧厛鏉ョ湅絎竴鏉★細鐩稿叧鎬у垎綰с傝繖閲屾瘮璁$畻Precision鏃剁畝鍗曠粺璁?#8220;鍑嗙‘”鎴?#8220;涓嶅噯紜?#8221;瑕佹洿涓虹簿緇嗐傛垜浠彲浠ュ皢緇撴灉緇嗗垎涓哄涓瓑綰с傛瘮濡傚父鐢ㄧ殑3綰э細Good錛堝ソ錛夈丗air錛堜竴鑸級銆丅ad錛堝樊錛夈傚搴旂殑鍒嗗紃el涓猴細Good:3 / Fair:2 / Bad:1 銆備竴浜涙洿涓虹粏鑷寸殑璇勪及浣跨敤5綰у垎綾繪硶錛歏ery Good錛堟槑鏄懼ソ錛夈丟ood錛堝ソ錛夈丗air錛堜竴鑸級銆丅ad錛堝樊錛夈乂ery Bad錛堟槑鏄懼樊錛夛紝鍙互灝嗗搴斿垎鍊紃el璁劇疆涓猴細Very Good:2 / Good:1 / Fair:0 / Bad:-1 / Very Bad: -2</p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">璇勫垽緇撴灉鐨勬爣鍑嗗彲浠ユ牴鎹叿浣撶殑搴旂敤鏉ョ‘瀹氾紝Very Good閫氬父鏄寚緇撴灉鐨勪富棰樺畬鍏ㄧ浉鍏籌紝騫朵笖緗戦〉鍐呭涓板瘜銆佽川閲忓緢楂樸傝屽叿浣撳埌姣忔潯</p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image14.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">DCG鐨勮綆楀叕寮忓茍涓嶅敮涓錛岀悊璁轟笂鍙姹傚鏁版姌鎵e洜瀛愮殑騫蟲粦鎬с傛垜涓漢璁や負涓嬮潰鐨凞CG鍏紡鏇村悎鐞嗭紝寮鴻皟浜嗙浉鍏蟲э紝絎?銆?鏉$粨鏋滅殑鎶樻墸緋繪暟涔熸洿鍚堢悊錛?/p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image15.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">姝ゆ椂DCG鍓?涓綅緗笂緇撴灉鐨勬姌鎵e洜瀛愶紙Discount factor錛夋暟鍊間負錛?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "></p><table cellspacing="0" cellpadding="0" border="1" style="color: #000000; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; text-align: start; background-color: #ffffff; "><tbody><tr><td width="189" valign="top" style="font-size: small; "><p align="center">i</p></td><td width="189" valign="top" style="font-size: small; "><p align="center">log<sub>2</sub> (i+1)</p></td><td width="189" valign="top" style="font-size: small; "><p align="center">1/log<sub>2</sub> (i+1)</p></td></tr><tr><td width="189" valign="top" style="font-size: small; "><p align="center">1</p></td><td width="189" valign="top" style="font-size: small; "><p align="center">1</p></td><td width="189" valign="top" style="font-size: small; "><p align="center">1</p></td></tr><tr><td width="189" valign="top" style="font-size: small; "><p align="center">2</p></td><td width="189" valign="top" style="font-size: small; "><p align="center">1.59</p></td><td width="189" valign="top" style="font-size: small; "><p align="center">0.63</p></td></tr><tr><td width="189" valign="top" style="font-size: small; "><p align="center">3</p></td><td width="189" valign="top" style="font-size: small; "><p align="center">2</p></td><td width="189" valign="top" style="font-size: small; "><p align="center">0.5</p></td></tr><tr><td width="189" valign="top" style="font-size: small; "><p align="center">4</p></td><td width="189" valign="top" style="font-size: small; "><p align="center">2.32</p></td><td width="189" valign="top" style="font-size: small; "><p align="center">0.43</p></td></tr></tbody></table><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "></p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鍙栦互2涓哄簳鐨刲og鍊間篃鏉ヨ嚜浜庣粡楠屽叕寮忥紝騫朵笉瀛樺湪鐞嗚涓婄殑渚濇嵁銆傚疄闄呬笂錛孡og鐨勫熀鏁板彲浠ユ牴鎹鉤婊戠殑闇姹傝繘琛屼慨鏀癸紝褰撳姞澶ф暟鍊兼椂錛堜緥濡備嬌鐢╨og<sub>5</sub> 浠f浛log<sub>2</sub>錛夛紝鎶樻墸鍥犲瓙闄嶄綆鏇翠負榪呴燂紝姝ゆ椂寮鴻皟浜嗗墠闈㈢粨鏋滅殑鏉冮噸銆?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">涓轟簡渚夸簬涓嶅悓綾誨瀷鐨剄uery緇撴灉涔嬮棿妯悜姣旇緝錛屼互DCG涓哄熀紜錛屼竴浜涜瘎浠風郴緇熻繕瀵笵CG榪涜浜嗗綊涓錛岃繖浜涙柟娉曠粺縐頒負nDCG錛堝嵆 normalize DCG錛夈傛渶甯哥敤鐨勮綆楁柟娉曟槸閫氳繃闄や互姣忎竴涓煡璇㈢殑鐞嗘兂鍊糹DCG錛坕deal DCG錛夋潵榪涜褰掍竴錛屽叕寮忎負錛?/p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image16.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">姹俷DCG闇瑕佹爣瀹氬嚭鐞嗘兂鎯呭喌鐨刬DCG錛屽疄闄呮搷浣滅殑鏃跺欐槸寮傚父鍥伴毦鐨勶紝鍥犱負姣忎釜浜哄“鏈濂界殑緇撴灉”鐞嗚В寰寰鍚勪笉鐩稿悓錛屼粠嫻烽噺鏁版嵁閲岄夊嚭鏈浼樼粨鏋滄槸寰堝洶闅劇殑浠誨姟錛屼絾鏄瘮杈冧袱緇勭粨鏋滃摢涓洿濂介氬父鏇村鏄擄紝鎵浠ュ疄璺靛簲鐢ㄤ腑錛岄氬父閫夋嫨緇撴灉瀵規瘮鐨勬柟娉曡繘琛岃瘎浼般?/p><h2>鎬庢牱瀹炵幇鑷姩鍖栫殑璇勪及錛?/h2><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">浠ヤ笂鎵浠嬬粛鐨勬悳绱㈠紩鎿庨噺鍖栬瘎浼版寚鏍囷紝鍦–ranfield璇勪及妗嗘灦錛圕ranfield Evaluation Framework錛変腑琚箍娉涗嬌鐢ㄣ備笟鐣岀煡鍚嶇殑TREC錛堟枃鏈俊鎭绱細璁級灝變竴鐩村熀浜庢綾繪柟娉曠粍緇囦俊鎭绱㈣瘎嫻嬪拰鎶鏈氦嫻併傞櫎浜員REC澶栵紝涓浜涢拡瀵逛笉鍚屽簲鐢ㄨ璁$殑Cranfield璇勬祴璁哄潧涔熷湪榪涜榪涜錛堝 NTCIR銆両REX絳夛級銆?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">浣咰ranfield璇勪及妗嗘灦瀛樺湪鐨勯棶棰樻槸鏌ヨ鏍蜂緥闆嗗悎鐨勬爣娉ㄤ笂銆傚埄鐢ㄦ墜宸ユ爣娉ㄧ瓟妗堢殑鏂瑰紡榪涜緗戠粶淇℃伅媯绱㈢殑璇勪環鏄竴涓棦鑰楄垂浜哄姏銆佸張鑰楄垂鏃墮棿鐨勮繃紼嬶紝鍙湁灝戞暟澶у叕鍙歌兘澶熶嬌鐢ㄣ傚茍涓旂敱浜庢悳绱㈠紩鎿庣畻娉曟敼榪涖佽繍钀ョ淮鎶ょ殑闇瑕侊紝媯绱㈡晥鏋滆瘎浠峰弽棣堢殑鏃墮棿闇瑕佸敖閲忕緝鐭紝鍥犳鑷姩鍖栫殑璇勬祴鏂規硶瀵規彁楂樿瘎浼版晥鐜囧崄鍒嗛噸瑕併傛渶甯哥敤鐨勮嚜鍔ㄨ瘎浼版柟娉曟槸A/B testing緋葷粺銆?/p><h3>A/B Testing</h3><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image17.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><p align="center" style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><strong>A/B Testing緋葷粺</strong></p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">A/B testing緋葷粺鍦ㄧ敤鎴鋒悳绱㈡椂錛岀敱緋葷粺鏉ヨ嚜鍔ㄥ喅瀹氱敤鎴風殑鍒嗙粍鍙鳳紙Bucket id錛夛紝閫氳繃鑷姩鎶藉彇嫻侀噺瀵煎叆涓嶅悓鍒嗘敮錛屼嬌寰楃浉搴斿垎緇勭殑鐢ㄦ埛鐪嬪埌鐨勬槸涓嶅悓浜у搧鐗堟湰錛堟垨涓嶅悓鎼滅儲寮曟搸錛夋彁渚涚殑緇撴灉銆傜敤鎴峰湪涓嶅悓鐗堟湰浜у搧涓嬬殑琛屼負灝嗚璁板綍涓嬫潵錛岃繖浜涜涓烘暟鎹氳繃鏁版嵁鍒嗘瀽褰㈡垚涓緋誨垪鎸囨爣錛岃岄氳繃榪欎簺鎸囨爣鐨勬瘮杈冿紝鏈鍚庡氨褰㈡垚浜嗗悇鐗堟湰涔嬮棿瀛頒紭瀛板姡鐨勭粨璁恒?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鍦ㄦ寚鏍囪綆楁椂錛屽張鍙粏鍒嗕負涓ょ鏂規硶錛屼竴縐嶆槸鍩轟簬涓撳璇勫垎鐨勬柟娉曪紱涓縐嶆槸鍩轟簬鐐瑰嚮緇熻鐨勬柟娉曘?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">涓撳璇勫垎鐨勬柟娉曢氬父鐢辨悳绱㈡牳蹇冩妧鏈爺鍙戝拰浜у搧浜哄憳鏉ヨ繘琛岋紝鏍規嵁棰勫厛璁懼畾鐨勬爣鍑嗗A銆丅涓ゅ鐜鐨勭粨鏋滅粰浜堣瘎鍒嗭紝鑾峰彇姣忎釜Query鐨勭粨鏋滃姣旓紝騫舵牴鎹畁DCG絳夋柟娉曡綆楁暣浣撹川閲忋?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鐐瑰嚮璇勫垎鏈夋洿楂樼殑鑷姩鍖栫▼搴︼紝榪欓噷浣跨敤浜嗕竴涓亣璁撅細鍚屾牱鐨勬帓搴忎綅緗紝鐐瑰嚮鏁伴噺澶氱殑緇撴灉璐ㄩ噺浼樹簬鐐瑰嚮鏁伴噺灝戠殑緇撴灉銆傦紙鍗矨2琛ㄧずA嫻嬭瘯鐜絎?鏉$粨鏋滐紝濡傛灉A2 > B2錛屽垯琛ㄧずA2璐ㄩ噺鏇村ソ錛夈傞氫織鐨勮錛岀浉淇$兢浼楋紙鍥犱負緹や紬鐨勭溂鐫涙槸闆寒鐨勶級銆傚湪榪欎釜鍋囪鍓嶆彁涓嬶紝鎴戜滑鍙互灝咥/B鐜鍓峃鏉$粨鏋滅殑鐐瑰嚮鐜囪嚜鍔ㄦ槧灝勪負璇勫垎錛岄氳繃緇熻澶ч噺鐨凲uery鐐瑰嚮緇撴灉錛屽彲浠ヨ幏寰楀彲闈犵殑璇勫垎瀵規瘮銆?/p><h3>Interleaving Testing</h3><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鍙﹀2003騫寸敱Thorsten Joachims 絳変漢鎻愬嚭鐨処nterleaving testing鏂規硶涔熻騫挎硾浣跨敤銆傝鏂規硶璁捐浜嗕竴涓厓鎼滅儲寮曟搸錛岀敤鎴瘋緭鍏ユ煡璇㈣瘝鍚庯紝灝嗘煡璇㈣瘝鍦ㄥ嚑涓憲鍚嶆悳绱㈠紩鎿庝腑鐨勬煡璇㈢粨鏋滈殢鏈烘販鍚堝弽棣堢粰鐢ㄦ埛錛屽茍鏀墮泦闅忓悗鐢ㄦ埛鐨勭粨鏋滅偣鍑昏涓轟俊鎭紟鏍規嵁鐢ㄦ埛涓嶅悓鐨勭偣鍑誨懼悜鎬э紝灝卞彲浠ュ垽鏂悳绱㈠紩鎿庤繑鍥炵粨鏋滅殑浼樺姡錛?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">濡備笅鍥炬墍紺猴紝灝嗙畻娉旳鍜孊鐨勭粨鏋滀氦鍙夋斁緗紝騫跺垎嫻侀噺榪涜嫻嬭瘯錛岃褰曠敤鎴風偣鍑諱俊鎭傛牴鎹偣鍑誨垎甯冩潵鍒ゆ柇A鍜孊鐜鐨勪紭鍔c?/p><p style="overflow-x: auto; width: 964.25px; overflow-y: hidden; font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><img border="0" _href="img://image1.jpg" _p="true" src="http://www.infoq.com/resource/articles/cyw-evaluate-seachengine-result-quality/zh/resources/image18.jpg" alt="" style="border: 0px; display: block; float: none; margin-left: auto; margin-right: auto; " /></p><p align="center" style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; "><strong>Interleaving Testing璇勪及鏂規硶</strong></p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">Joachims鍚屾椂璇佹槑浜咺nterleaving Testing璇勪環鏂規硶涓庝紶緇烠ranfield璇勪環鏂規硶鐨勭粨鏋滃叿鏈夎緝楂樼殑鐩稿叧鎬с傜敱浜庤褰曠敤鎴烽夋嫨媯绱㈢粨鏋滅殑琛屼負鏄竴涓笉鑰楄垂浜哄姏鐨勮繃紼嬶紝鍥犳鍙互渚挎嵎鐨勫疄鐜拌嚜鍔ㄥ寲鐨勬悳绱㈡晥鏋滆瘎浼般?/p><h2>鎬葷粨</h2><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">娌℃湁璇勪及灝辨病鏈夎繘姝?#8212;—瀵規悳绱㈡晥鏋滅殑閲忓寲璇勬祴錛岀洰鐨勬槸鍑嗙‘鐨勬壘鍑虹幇鏈夋悳绱㈢郴緇熺殑涓嶈凍錛堟病鏈夊摢涓悳绱㈢郴緇熸槸瀹岀編鐨勶級錛岃繘鑰屼竴姝ヤ竴涓剼鍗板綆楁硶銆佺郴緇熻繘琛屾敼榪涖傛湰鏂囦負澶у鎬葷粨浜嗗父鐢ㄧ殑璇勪環妗嗘灦鍜岃瘎浠鋒寚鏍囥傝繖浜涙妧鏈儚涓鎶婃妸灝哄瓙錛屽害閲忕潃鎼滅儲鎶鏈瘡涓嬈″墠榪涚殑璺濈銆?/p><hr style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; " /><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">鎰熻阿<a style="color: #0b59b2; ">寮犲嚡宄?/a>瀵?鏈枃鐨勫鏍°?/p><p style="font-family: Lucida, 'Lucida Grande', Tahoma, sans-serif; font-size: 13px; line-height: 19px; background-color: #ffffff; ">緇橧nfoQ涓枃绔欐姇紼挎垨鑰呭弬涓庡唴瀹圭炕璇戝伐浣滐紝璇烽偖浠惰嚦<a href="mailto:editors@cn.infoq.com" style="color: #0b59b2; ">editors@cn.infoq.com</a>銆備篃嬈㈣繋澶у鍔犲叆鍒?a target="_blank" style="color: #0b59b2; ">InfoQ涓枃绔欑敤鎴瘋璁虹粍</a>涓笌鎴戜滑鐨勭紪杈戝拰鍏朵粬璇昏?鏈嬪弸浜ゆ祦銆?/p><img src ="http://m.shnenglu.com/humanchao/aggbug/196436.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.shnenglu.com/humanchao/" target="_blank">鑳℃弧瓚?/a> 2012-12-19 11:03 <a href="http://m.shnenglu.com/humanchao/archive/2012/12/19/196436.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss> <a href="http://m.shnenglu.com/">青青草原综合久久大伊人导航_色综合久久天天综合_日日噜噜夜夜狠狠久久丁香五月_热久久这里只有精品</a> <div style="position:fixed;left:-9000px;top:-9000px;"><font id="pjuwb"></font><button id="pjuwb"><pre id="pjuwb"></pre></button><sub id="pjuwb"></sub><tbody id="pjuwb"><var id="pjuwb"><address id="pjuwb"></address></var></tbody><listing id="pjuwb"><label id="pjuwb"><strong 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