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̽ӑӰ푙Cеӹȵc
1
ļӹ|DZCCеaƷܺͮaƷĻACеӹ|ָЃɷ漴ӹc|ڙCеӹ^ڸNصӰʹߺg[1]_λðlƫӹcҪȫߵķϳ̶ȿÙCеӹȺͼӹ`ʾӹָӹČH΅ߴΠλãc΅ķϳ̶ӹ`ָӹČH΅ߴΠλãc΅ƫx̶ӹԽtӹ`ԽС֮ԽӹȵĸߵԇP˜ʁʾ
2 @üӹȵij÷
1@óߴ羫ȵķԇзچμСa{ڳߴ絶߷aʸsԄӿƷya{
2@Πȵķ܉Eõ\܉EγɹΠε߷ɵеΠγɹΠչɷаjγɹΠ[2].
3@λþȵķҪəCA߾ȺbAȁC
3 CеӹȵӰ
3.1 ˇϵyĎξȌӹȵӰ
3.1.1 ӹԭ`
ӹԭ`ָ˽Ƶij\ӻƵ݆Mмӹa`LXӹõX݆LЃɷN`X`ϵyð»UֱUu_UڝLXHӹXһl۾ՓĹ⻬u_вͨ^ýƵij\ӻƵ݆mȻӹԭ`ɺCߵĽYaЧЕrܵõ^ߵļӹ[3].ֻҪ`^ҎľҪaܵõVđ
3.1.2 C`
C`ɚw{飺C܉`CSD`C朵`
1SD` SD`HDScDSƫNʽ
ǶȔ[SZD1ʾ
ӰSDȵҪSб`Sg϶SgͬS`SiSͬS`SϵyĄȺ͟׃εSDȵӰ푴СSӹʽͬ
2C܉` ܉Ǵ_ҪλõĻҲ\ӻ`ֱӰ푱ӹľȌ܉ľҪҪУˮƽȵֱڴֱȵֱǰ܉ƽжȣŤ܉`ӹȵӰ푣܇r܉ˮƽȏǰtF`[4];tF`D2ʾ
3C` ָCȂʼĩɶ˵ĂԪg\ӵ`һÂĩԪD`aԭǂиԪ`b`ĥpX݆iijһr̮aD`$Ui,tɂĩԪD`Ki$Ui,KiԓSĩԪĿӱQ`fϵKi1t`U֮KiС1`sСӼӰ푵Ŀ͞EKi$Ui.
3.1.3 ߵĎ`
bA`߰b`ߴ絶ߣ߳ߴ羫ֱӰ푹ߴ羫εߣΠֱӰ푹ΠչɵߣΠȕӰ푹ӹһ㵶ߣ쾫ȌӹȟoֱӰ[5].
3.1.4 {`
ڹ{ڵ`{`һ{ڵ`@һӰ푲׃
ӹдڶ{ÿȫͬȫfÿ{`żȻ`
C{`ߴֲĵƫ
3.2 ˇϵy׃ΌӹȵӰ
ˇϵyӹܵУTAoˇϵy@Щa׃@N׃ΌƉк֮g{õ_λPϵĶaӹ`ˇϵyĄȌӹȵӰ푚w{гҊʽcλõ׃aĹΠ``ӳëӲȲʹa׃ˇϵy׃S֮׃aӹ`ˇϵyʹˇϵyijЩh׃ζaӹ`D3ʾ
3.3 ˇϵyğ׃ΌӹȵӰ
ˇϵyڸNԴӰas׃¹aӹ`ˇϵyğ׃ΌӹȵӰҪ֞NC׃ļӹ`CܟԴӰ֜l׃ڟԴֲIJ͙CYďsCl̶ͬȵğ׃Ɖ˙CԭеĎξĶ˙Cļӹ׃ļӹ`ʹa׃εğԴʹa׃εğԴᣨҪcⲿԴͬrͬļӹͬĹYͳߴܟ׃Ҳͬ[6];ߟ׃ļӹ`ߵğ׃ҪoߵğmڵweССҟּԮaܸߵĜ
4 ߙCеӹȵĴʩ
1ֱӜp` ֱӜp`aБ^Vڲaӹ`ҪֱMpٵķ磺LS܇͟Ӱ푶ʹa׃FáMo,o֮ԏɺ피MһLΣD4ʾ
2`a `a˞һNµԭʼ`ȥԭˇϵyйеԭʼ`Ķpټӹ`ӹ[7].
3`DƷ `DƷ|njˇϵyĎ`׃κ͟׃εDƵӰ푼ӹȵķȥзֶȻDλĶλӹDλܼӹĹֶDλ`ֱӰPļӹߴֱbDɌDDλr؏Ͷλ`DƵȿӹ`зɜpټӹ`Įaӹ[8].
4ԭʼ` ëȻϵļӹDz@rɰëϵĹߴ`С֞nMÿMë`ͿsСԭ1/n,ȻMƽߴքe{cλû{λԪͿɴsСijߴɢaЕ@NrļӹȷҲëϵӹİƷ̫λ`ӳ`^ܱCӹ[9].
5͵ؼӹ Cbλپӹ`Ӱţ^Tٹ_bCMСԡӹԱCMƽжƽĥ_bĥԡӹڙCPƽƽֱצͬS
5 Y Z
ڙCеӹ^`Įa܉ֻнYϾwr`FԭMԔM܉ȡČߜpСӹ`ĶߙCеӹľʹӹ`Sɷ֮ĶCļӹ|
īI
[1] ƽCеӹ`ķ[J].ߌ 20054 124-125.
[2] Cе켼g[M].CеI 1999.
[3] ˇϵy`ӹȵӰ[ J].ƼϢ 20044 56-58.
[4] xwRطNӹİ[M].CеI2004.
[5] 칤փ[M].չI 1993.
[6] RCе켼g[M].CеI 2005.
[7] wCеӹˇAc[M].ߵȽ 1999.
[8] O־Ԭοƽֵ2棩[M].Ͼ|ϴW 2002.
[9] Чؼg[M].hƌWg200.
[10] ϯӽؙCӹˇcS[M].Lӳ 2003.
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