л???ó?ú

?

????а???￡?С

                                     ?

 

???а?

??

?????????????????????л??????л????????й?ɡ棬??

???????????(3???)?????й??й(?????)й?????(3??з)??????

й?????

????й?ɡ????????????й?

?ó?ú(3?ó)???Χ??????

???(???)?ó??Χ???????

?

??????滮??ù滮??????

??????еε???????????飬???

(?)??????顢?????

()??й????豸

()???????????

?????

(?)???

()????2000?

()?з???????治?30

()??20;

()??涨

??з???(???)?????й?涨??????????????????

??

??????м??2?

(?)??飻

()?????鼰????о;

()??????(?)?(?)?;

()???????

м????г??滮??ù滮?滮??ù滮????

?????м??

??2?

(?)?

()?м??????ù滮?м???????滮??ù滮

()???????а???????(λ)??????;

()ɡ涨?

??45????

?????(????????)??????????м?????????

?????й?ɡ?ó??2?

(?)????;

()???????????3?

()???????;

()?????????飻

()ɡ?ó涨?

?ó??45??????????顷

???????ó??????顷?????鵽?????

???????????????Χ????????涨

?????????????????????涨?????涨??????????

??????????м???????

??????????????涨???????ɡ

????÷?

???

?????(λ)???????1涨????????????

???漰?3й? ??ó??ó?

?????20??????????????90??????ó????ó???45????

?????????涨?й???δ??????ú??

??

????????壬???еΡ

???????С???????????????涨

?????????淶??淶?豸?豸???й?涨

??????1??й?ɡ洦?

???????????л????????л?????й?涨?

????1?л?????????

???????棬?л???淨????

??????????й?涨?С

????????й?涨?С

??

??????????

??????????У?Σ?????У????????

??????????й?涨?й????

????Υй?ɡ?￡й?鴦Υ??????

ó??ɡ??

??????óΥ?涨????ú???й??Ρ

δ?ó?????????????,?????????????й?涨д

?

?????????????????С

?й?????

?????ó??????涨

???ó?

?涨200071?? ???????[89]3??????[1997]?ó292???