Using the three ? arameter solid model and the burgers four - parameter model to fit the creep curve separately , it was found that the burgers model can describe the creep process more well , and then provide parameters for finite element analysis of asphalt concrete cores for embankment dams 用三元固體模型和burgers四元模型來(lái)擬合瀝青混凝土的蠕變曲線,發(fā)現(xiàn)burgers模型能夠更好的描述瀝青混凝土的蠕變過(guò)程,為土石壩瀝青混凝土心墻的有限元計(jì)算提供參數(shù)。
The theoretical analysis and the simulation of the chain structure model indicate that the fluctuations of mass leaving enthalpy close in on that of distributed parameter model with two - order , two - order , and three order precision at the disturbances of heat flow rate , mass entering flow rate , and mass entering enthalpy 理論分析及仿真結(jié)果表明,該模型在熱流量、入口流量和入口焓的擾動(dòng)條件下,出口焓的變化分別以二階、二階、三階精度逼近分布參數(shù)模型。
On the basis of studying reservoir parameter model , setting up and forming invasion water characteristic method , mobile water analyzing method and resistively intersection method , etc . interpretation methods , which effectively improving coincidence rate of oil and water interpretation and providing a technical support for exploration production and reserve evaluation 在儲(chǔ)層參數(shù)模型研究基礎(chǔ)上,建立并形成了侵入特徵法、可動(dòng)水分析法、電阻率交會(huì)法等解釋方法,有效提高了油水層解釋符合率,為勘探生產(chǎn)和儲(chǔ)量評(píng)價(jià)提供了技術(shù)支援。
Based on the theory of system identification and experimental data , the simulating results of many kinds of parameter models have been compared . among them , we can find a parameter model that can precisely express the dynamic character of measurement system . on the system model constructed , the dynamic error of measuring data is processed by inverse filtering method 本文先后對(duì)測(cè)試系統(tǒng)進(jìn)行了多次動(dòng)態(tài)校準(zhǔn),根據(jù)所得實(shí)驗(yàn)數(shù)據(jù)在系統(tǒng)辨識(shí)理論的基礎(chǔ)上,比較了多種參數(shù)模型的仿真效果,尋找到一類能夠準(zhǔn)確地描述測(cè)試系統(tǒng)動(dòng)態(tài)特性的參數(shù)化模型,并根據(jù)所建立的系統(tǒng)模型,采用反濾波方法改進(jìn)了測(cè)試系統(tǒng)的動(dòng)態(tài)特性。
Obtained by emtp program and the egm , this paper studies on lightning protection performance on 500kv double circuit transmission line the distributed parameter model of tower is built when analyzing the back stroking lightning protection performance for double circuit line , it can truly reflect the spreading course of lightning current on the tower , furthermore , considering the randomness of working voltage ' s phase when lightning strokes the top tower and supposing the probability of lightning appearing arbitrary phase in a cycle of ac is equal , this paper brings forward the statistical method to calculate the rate of back stroking on double circuit line 本文利用emtp程序、擊距法對(duì)500kv同桿雙回線路的耐雷性能進(jìn)行了研究。在分析同桿雙回線路的反擊耐雷性能時(shí),建立了桿塔的分布參數(shù)計(jì)算模型,此模型可以真實(shí)地反映雷電流在桿塔上的傳播過(guò)程。并針對(duì)雷擊塔頂時(shí),導(dǎo)線運(yùn)行電壓相位角的隨機(jī)性,本文假定雷擊出現(xiàn)于交流一周期的任一角度區(qū)間內(nèi)的概率相等,提出了利用統(tǒng)計(jì)法計(jì)算同桿雙回線路的反擊跳閘率。
In order to geosteering , log - geology model of target formation should be built according to logging data and the interpreting result of wells nearby . geosteering parameters model is created to build simulative curves . compared these curves with logging curves , the position and drilling direction of the bit can be found combined with the concrete geological situation 要實(shí)現(xiàn)地質(zhì)導(dǎo)向,首先要根據(jù)鄰井的測(cè)井資料及其解釋結(jié)果建立目標(biāo)層測(cè)井地質(zhì)模式,然后通過(guò)建立地質(zhì)導(dǎo)向參數(shù)的預(yù)測(cè)模型構(gòu)造相應(yīng)的模擬曲線,將模擬曲線與實(shí)測(cè)曲線進(jìn)行對(duì)比,結(jié)合具體地質(zhì)情況,確定鉆頭在目標(biāo)層中的位置及其鉆進(jìn)方向,及時(shí)調(diào)整井眼軌跡,使其始終保持在目標(biāo)層中物性最好的部位。