The backward scattering field of extended target is approximated as the synthesis of many strong scatter centers on target , and geometric optical method is used in establishing deterministic model of a aircraft in the paper , the model is used to evaluate the performance of frequency diversity in suppressing glint at last 本文將復(fù)雜目標(biāo)后向散射回波近似為目標(biāo)上若干強散射中心回波的合成,結(jié)合幾何光學(xué)法得到了某種飛機目標(biāo)的確定性模型,并用該模型評定頻率分集對角閃爍抑制的改善性能。
It benefits to build 3d reservoir geological model with 2d seismic data . some methods that can integrate seismic data to build reservoir geological model are introduced , for example , co - kriging , collocated co - kriging , kriging with an external drift and bayes kriging of deterministic modeling methods , sequential indicator collocated co - simulation , sequential gaussian co - simulation , sequential gaussian collocated co - simulation and sequential gaussian simulation with block kriging of stochastic modeling methods , and stochastic inversion method 介紹了能夠結(jié)合地震資料建立儲層地質(zhì)模型的協(xié)克里金、同位協(xié)同克里金、具有外部漂移的克里金和貝葉斯克里金等確定性建模方法、序貫指示同位協(xié)同模擬、序貫高斯協(xié)模擬、序貫高斯同位協(xié)同模擬和塊克里金序貫高斯模擬等隨機建模方法,以及隨機反演方法。
Based the result of calculation and analysis in this paper , it is feasible that predicting of the service life of reinforced concrete component exposed to chloride environment with a probability based method . the result of analysis is consistent with the changing rules of service life in practice . probability based limit state method is used for service prediction . it is more reasonable than a deterministic model and satisfied with the required method of national structure designing uniform code 理論研究和實例分析的結(jié)果表明,本文建立的基于概率的極限狀態(tài)分析方法的氯離子侵蝕環(huán)境下鋼筋混凝土構(gòu)件耐壽命的預(yù)測方法是可行和有效的,計算結(jié)華僑大學(xué)申請碩十學(xué)位論文果反映出工程實際中構(gòu)件耐久性壽命的變化規(guī)律;本文使用的基于概率的極限狀態(tài)分析方法比確定性計算方法更科學(xué),與我國現(xiàn)行結(jié)構(gòu)設(shè)計規(guī)范中所規(guī)定的設(shè)計思想保持一致。
Firstly , well - log data is main data in reservoir geological modeling integrated seismic and well - log data , seismic data only makes restriction function , and seismic data is main in seismic inversion , well - log data only makes restriction function . secondly , reservoir geological modeling integrated seismic and well - log data not only includes deterministic modeling methods , but also includes stochastic modeling methods , and seismic inversion belongs to deterministic modeling domain . they also have some difference ir , modeling arithmetic and precision 但兩者之間存在很大的不同,地震與地質(zhì)資料綜合儲層地質(zhì)建模以井資料為主,地震資料起約束作用,而地震反演以地震資料為主,井資料起約束作用;前者即包括確定性建模方法,也包括隨機建模方法,而后者從廣義上講屬確定性建模范疇;兩者在建模算法和精度等方面還有所不同。