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light place中文什么意思
例句與用法
- Preserved at a cool dry , evades light place , seal
于陰涼干燥處密封置放，避光保存。 - A wax - light placed on the mantle - piece threw some of its pale rays without , and a shadow was seen for one moment on the balcony
壁爐架上的一支蠟燭把它一部分慘白的光射到外面來，陽臺上出現(xiàn)了一個人影。 - Based on these models , a main - road traffic flow model with two speeds on one dimension is designed . this model simulate the situation of one road in the city , traffic lights placed on the crossing , using the computer simulation , firstly , in the case of synchronized traffic lights , we investigated the velocity and flow of the model when the initial density , the turning probabilities , the number of the traffic lights , the green to signal ratio and the period of the signal are changed , then we have advanced some meliorate measure to traffic flow ; secondly , in the case of the traffic lights " signal update delay in turn , we found the optimal matching between the period of the signal and the delay time of the traffic lights so as to the perfect velocity and the flow of the model are attained
在此基礎(chǔ)上，建立了一維二速主干道模型，該模型模擬了城市交通中一條主干道的交通情況，在交叉口處設(shè)置紅綠燈，通過計算機(jī)模擬，首先，在交通燈信號同步更新的條件下，研究模型在改變車輛的初始密度、轉(zhuǎn)向概率、交通燈個數(shù)、紅綠燈信號的綠信比、紅綠燈信號周期等各種情況下主干道的速度、流量的變化，根據(jù)模擬結(jié)果提出一些改善交通的有效措施；其次，在交通燈信號依次延遲更新的條件下，研究模型在參數(shù)道路長、紅綠燈綠信比、交通燈個數(shù)、車輛的初始密度給定的情況下找到紅綠燈信號周期和延遲時間的最佳匹配使得主干道的速度、流量達(dá)到最理想的值。 - We also analyze the influence of the boundary condition 、 safety distance and deceleration probability to the traffic flow . finally , we propose an crossroad modle . this model is made up of one main road and one branches ： traffic with lights placed on the crossing , vehicles " breaking while running and turning to other direction while jamming . we investigate the velocity and flow of the model when the initial density , the brake and turning probabilities , the green to signal ratio are changed . then the reasons causing all the kinds of phenomena are analyzed
最后研究了周期性邊界條件下的十字路口的ca模型，該模型由一條主干道和一條支道組成，在干道與支道的交叉路口設(shè)置紅綠燈，車輛在運(yùn)行中對突發(fā)事件發(fā)生反應(yīng)的剎車，路口的車輛可以轉(zhuǎn)向等各種實際交通行為，并通過計算機(jī)模擬，研究模型在改變車輛的初始密度、剎車概率、轉(zhuǎn)向概率、紅綠燈信號的綠信比等各種情況下支、主干道車輛的速度、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。 - 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，車輛在運(yùn)行中可以有對突發(fā)事件發(fā)生反應(yīng)的剎車，在發(fā)生堵塞時，路口的車輛可考慮通過轉(zhuǎn)向來緩解交通等各種實際情況的發(fā)生，給出了車輛演化的演化方程，并通過計算機(jī)模擬，研究模型在改變車輛的初始密度、剎車概率、轉(zhuǎn)向概率、支道數(shù)、紅綠燈信號的綠信比、紅綠燈信號周期等各種情況下支、主干道車輛的速度、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)果相類似的速度-密度圖線，且車輛從運(yùn)動相到堵塞相轉(zhuǎn)變的上下臨界密度是一致的，同時分別給出車輛在處于暢通相和堵塞相時， boltzmann函數(shù)在格子上的分布情況，進(jìn)一步驗證了此法的可行性。