Simulation of bidirectional pedestrian flow in transfer station corridor based on multi forces

A good understanding of pedestrian movement in the transfer corridor is vital for the planning and design of the station,especially for efficiency and safety.A multi-force vector grid model was presented to simulate the movement of bidirectional pedestrian flow based on cellular automata and forces between pedestrians.The model improves rule-based characteristics of cellular automata,details forces between pedestrians and solves pedestrian collisions by a several-step updating method to simulate pedestrian movements.Two general scenarios in corridor were simulated.One is bidirectional pedestrian flow simulation with isolation facility,and the other is bidirectional pedestrian flow simulation without isolation facility,where there exists disturbance in the middle.Through simulation,some facts can be seen that pedestrians in the case with isolation facility have the largest speed and pedestrians in the case without isolation facility have the smallest speed; pedestrians in the case of unidirectional flow have the largest volume and pedestrians in the case of without isolation facility have the smallest volume.

比附“主谓结构”引起的问题

说汉语也有"主谓结构",这只是一种比附的说法,因为汉语并没有界定主谓结构的形式标准,所说的"主谓结构"其实是指逻辑上的命题。比附主谓结构并用它来套汉语现象,结果引起许多问题,特别表现在近年来学界讨论的一些热点问题上,主要有施格型、中动式、事件结构、关系从句、话题凸显等五个。布龙菲尔德指出,"语言学研究的一条基本原则是,我们无权在分析一种语言的时候注入这种语言没有表示的区分",要解决存在的问题,我们应该认真考虑在讲汉语语法的时候如何超越主谓结构。