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method of lattice中文是什么意思

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  • The composite roll of high speed steel has the synthetical life of over ten times more than traditional high cr cast iron roll . now the research and production of the high speed steel for roll are very drastic . in this thesis , the microstructure , heat treatment and performance of high speed steel fe - 2 % c - 4 % v - 4 % mo - 5 % cr - x % w ( wt ) are studied systematically by using metallograph , method of lattice , xrd , sem , eds and hardness
    本文利用金相法(包括黑白金相和彩色金相) 、 x射線衍射( xrd ) 、掃描電子顯微鏡( sem ) 、能譜( eds )及洛氏硬度分析儀等手段,對(duì)復(fù)合軋輥用高速鋼fe - 2 c - 4 v - 4 mo - 5 cr - x w (其它部分如未作特殊注明均為質(zhì)量分?jǐn)?shù))合金系的顯微組織、熱處理工藝及性能進(jìn)行了系統(tǒng)地分析。
  • Secondllv in the 1 d random traffic flow model . the relation function between the correlation and the creation . disappearance . brake probabilities of the vehicles is presented . according to the statistical mechanical approach to the spatial correlation functions . the theoretical results agree with that of the computer simulation . thirdh . based on the bml model . a main - road traffic flow model with two speeds on two dimensions is designed . this model simulate the traffic situation of one main road and several branches in the cit traffic lights placed on the crossing . vehicles breaking ~ vhile running and turning to other direction while jamming . we investigate the ~ ' e1ocitv and flo ~ ~ of the model when the initial densitvthe brake and turning probabilities . the green to signal rati3 . thc number of the branches and the period of the signal are changed . then the reasons causing all the kinds of phenomena are analvzed . finallv . we simulate the bml model using the method of lattice boltzmann which ~ vas brought out by liu mu - renand obtain the velocity - density graph similar to the previous result . the upper critical densiw above which there are oniv jamming configurations . and the lo ~ ver critical density below which there are only moving configurations are the same as before . the boltzmann function which is on the lattices shows the moving and jaxmning transition obviouslv . thus it proves the possibilit of this method on the traffic research
    接著,建立了和研究了二維二速的主干道模型,該模型模擬了城市交通中一條主干道,多條支道的交通情況,在干道與支道的交叉路口設(shè)置紅綠燈,車(chē)輛在運(yùn)行中可以有對(duì)突發(fā)事件發(fā)生反應(yīng)的剎車(chē),在發(fā)生堵塞時(shí),路口的車(chē)輛可考慮通過(guò)轉(zhuǎn)向來(lái)緩解交通等各種實(shí)際情況的發(fā)生,給出了車(chē)輛演化的演化方程,并通過(guò)計(jì)算機(jī)模擬,研究模型在改變車(chē)輛的初始密度、剎車(chē)概率、轉(zhuǎn)向概率、支道數(shù)、紅綠燈信號(hào)的綠信比、紅綠燈信號(hào)周期等各種情況下支、主干道車(chē)輛的速度、流量的變化,并分析在各種情況下交通狀況的成因,提出改善交通的有效措施。最后,在劉慕仁提出的用格子boltzmann方法研究一維決定論交通流的思路下,將此法推廣到對(duì)二維bml模型的模擬上,得到了與用以往方法的研究結(jié)果相類(lèi)似的速度-密度圖線,且車(chē)輛從運(yùn)動(dòng)相到堵塞相轉(zhuǎn)變的上下臨界密度是一致的,同時(shí)分別給出車(chē)輛在處于暢通相和堵塞相時(shí), boltzmann函數(shù)在格子上的分布情況,進(jìn)一步驗(yàn)證了此法的可行性。
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