renand meaning in Chinese
勒南
Examples
- 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。