light place中文什么意思

例句与用法

1. Preserved at a cool dry , evades light place , seal
   于阴凉干燥处密封置放，避光保存。
2. 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
   壁炉架上的一支蜡烛把它一部分惨白的光射到外面来，阳台上出现了一个人影。
3. 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
   在此基础上，建立了一维二速主干道模型，该模型模拟了城市交通中一条主干道的交通情况，在交叉口处设置红绿灯，通过计算机模拟，首先，在交通灯信号同步更新的条件下，研究模型在改变车辆的初始密度、转向概率、交通灯个数、红绿灯信号的绿信比、红绿灯信号周期等各种情况下主干道的速度、流量的变化，根据模拟结果提出一些改善交通的有效措施；其次，在交通灯信号依次延迟更新的条件下，研究模型在参数道路长、红绿灯绿信比、交通灯个数、车辆的初始密度给定的情况下找到红绿灯信号周期和延迟时间的最佳匹配使得主干道的速度、流量达到最理想的值。
4. 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
   最后研究了周期性边界条件下的十字路口的ca模型，该模型由一条主干道和一条支道组成，在干道与支道的交叉路口设置红绿灯，车辆在运行中对突发事件发生反应的刹车，路口的车辆可以转向等各种实际交通行为，并通过计算机模拟，研究模型在改变车辆的初始密度、刹车概率、转向概率、红绿灯信号的绿信比等各种情况下支、主干道车辆的速度、流量的变化，并分析在各种情况下交通状况的成因，提出改善交通的有效措施。
5. 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
   接着，建立了和研究了二维二速的主干道模型，该模型模拟了城市交通中一条主干道，多条支道的交通情况，在干道与支道的交叉路口设置红绿灯，车辆在运行中可以有对突发事件发生反应的刹车，在发生堵塞时，路口的车辆可考虑通过转向来缓解交通等各种实际情况的发生，给出了车辆演化的演化方程，并通过计算机模拟，研究模型在改变车辆的初始密度、刹车概率、转向概率、支道数、红绿灯信号的绿信比、红绿灯信号周期等各种情况下支、主干道车辆的速度、流量的变化，并分析在各种情况下交通状况的成因，提出改善交通的有效措施。最后，在刘慕仁提出的用格子boltzmann方法研究一维决定论交通流的思路下，将此法推广到对二维bml模型的模拟上，得到了与用以往方法的研究结果相类似的速度-密度图线，且车辆从运动相到堵塞相转变的上下临界密度是一致的，同时分别给出车辆在处于畅通相和堵塞相时， boltzmann函数在格子上的分布情况，进一步验证了此法的可行性。