On this foundation the article inducts in detail the method which is based on the relative settlement of calculating unit area end support ( qb ) force at the same time considering the feature of pedestal pile ' s " arch effect " the article introduces conception of pile effective length and finally obtain t he formula of calculating man - made pipe with bulb - shaped axial carrying capacity . the article uses marc program to calculate and analyze foundation soil ' s stress and displacement and gets the change curve chart and the proportion that is shared by king - pipe side soil friction resistance and pipe end counterforce respectively . the article inducts the structure of pedestal in detail on the basis of generalizing pedestal application cases of many countries 在此基礎(chǔ)上論文詳細(xì)歸納了以相對(duì)沉降為依據(jù)確定單位面積端承力q _ b的計(jì)算方法,并考慮擴(kuò)底樁的“拱效應(yīng)”特點(diǎn)引入了有效樁長(zhǎng)的概念,最后結(jié)合公路規(guī)范推出了比較實(shí)用的人工挖孔擴(kuò)底樁軸向承載力計(jì)算公式。論文運(yùn)用了marc程序?qū)Φ鼗恋膽?yīng)力和位移進(jìn)行了有限元數(shù)值計(jì)算分析,得到了地基土的應(yīng)力和位移場(chǎng)的變化曲線和在加載過程中樁側(cè)土摩阻力和樁端反力各自所承擔(dān)的比例;本文還在總結(jié)各國(guó)挖孔擴(kuò)底樁應(yīng)用情況的基礎(chǔ)上就擴(kuò)底樁的構(gòu)造進(jìn)行了詳細(xì)的歸納。
At first , the author introduces the model of multi element linear regressive analysis . moreover , the author thinks that plotting grade and accessing price of land - value is also a model of city land - value spatial structure . and then , the author also provides her physiognomy model of city land - value spatial structure that includes the conception of the city land - value surface , land - value section chart ( land - value curve chart ) and land - value isoline chart 筆者首先介紹了多元線形回歸模型,認(rèn)為城市土地的定級(jí)估價(jià)本身就是一種城市地價(jià)空間結(jié)構(gòu)模型,在此基礎(chǔ)上,又提出了自己的城市地價(jià)空間結(jié)構(gòu)的地貌模型,在這個(gè)模型中,筆者提出了城市地價(jià)面、地價(jià)剖面圖(地價(jià)曲線圖) 、地價(jià)等值線圖等概念。
And then , the thesis import a thrice - polynomial technology to depict the yield curve of shanghai stork exchange market and gained the yield curve chart . under one factor model hypothesis , deduce the bond pricing formulae . based on 1945 data of buy - back rate in banking market , the thesis use ols and gmm estimation technologies to estimate the parameters of vasicek model , cir model , and ckls model , and verify which model can explain the china market ’ s short rate ’ s wave 然后,從實(shí)證的角度,用三次多項(xiàng)式來擬合上交所國(guó)債收益率曲線,并得出收益率曲線圖,在單因素模型推導(dǎo)了動(dòng)態(tài)理論期限結(jié)構(gòu)下的債券定價(jià)公式,并以1945個(gè)中國(guó)銀行間債券市場(chǎng)7天回購(gòu)利率數(shù)據(jù)作為短期利率的代表,驗(yàn)證vasicek模型、 cir模型與ckls模型是否適用中國(guó)短期利率的波動(dòng)行為,估計(jì)出三個(gè)模型的參數(shù)。