Besides , the author understood the rule of negative multiplication completely and studied the problem of permutation and combination deeply 另外,薩瑪瓦爾完全理解了負(fù)數(shù)的乘法法則,并對(duì)排列組合問(wèn)題也有充分的認(rèn)識(shí)。
And through leslie matrix analysis , we deduced , except of the subpopulation at altitude 490m , the subpopulations of lilium tsingtauense will not die out if not been disturbed badly . we estimated the growth ability and resistance ability of both metapopulation and local population by use the method of quamitative analysis for population structura1 dynamics . the growth ability order is population l > population 2 > population 3 > population 5 > population 6 > metapopulation > population 4 川叩iqu n了e )復(fù)合種群研究摘要從種群年齡結(jié)構(gòu)的穩(wěn)定、衰退、增長(zhǎng)概念出發(fā),以種群結(jié)構(gòu)參數(shù)為依據(jù),運(yùn)用加權(quán)法與條件概率乘法法則,定量椎導(dǎo)出衡量種群年齡結(jié)構(gòu)及群落結(jié)構(gòu)的動(dòng)態(tài)指數(shù),該方法克服了過(guò)去在植物種群結(jié)構(gòu)動(dòng)態(tài)比較評(píng)價(jià)中粗放的等級(jí)歸類(lèi)劃分的缺陷,并能解決結(jié)構(gòu)動(dòng)態(tài)定量比較評(píng)價(jià)問(wèn)題,因而認(rèn)為有普遍使用的價(jià)值。