Study On The Simulation Of The Pedestrian Flow Based On The Multi-agent System

It is an important field to simulate the evolution of cities and related systems with a dynamic model by GIS. The development of the theory and method of multi-agent system provide a new way to simulate the urban dynamics. By this, the research to the complex urban system and mechanism will be promoted so greatly that it can be simulated the urban pedestrian flow. Urban pedestrian flow simulation, that is what this dissertation focus on. By the Complex Autonomous System theory and method, a dynamic model based on the multi-agent system will be set up, and then it will be applied to simulate the spatial evolution and temporal process of pedestrian flow in the city.The central works in this dissertation are listed as follows:1. The scheme for urban pedestrian flow simulation was discussed after the systematic analysis of Modernistic System Science, Nonlinear Science and Science of Complexity and comprehensive exploration of complexity properties of pedestrian flow in urban, especial to the Multi-agent System theory from Artificial Intelligence.2. Considering the characteristic of urban pedestrian flow and Multi-agent System, a dynamic model framework is brought forward as a general framework of based simulation model for simulating and analyzing complex pedestrian flow system. It is a scheme for the study of pedestrian flow, through which profound principle can be explored. By that, a dynamic model is constructed especially for simulating urban pedestrian flow dynamic evolution. With the support of GIS spatial database, it can also simulate the real city pedestrian flow, while the hypothetical city environment can be used for simulation using this model. Bottom-Up modeling strategy are applied in this model. And it has hierarchical structure. It is composed of many layers. By dynamically integrating with socio-economical model, it enables macro and micro principles, statistical attributes and spatial distribution pattern to combine together concurrently. The simulating and predicting power of this model is strong.3. To achieve the intelligence of pedestrian agent, the design of the model in this dissertation should base on the vector data not on the grid data when it is applied in GIS. And the key technology is discussed to carry out the integration the model with GIS. Therefore the dynamic model could be support by the GIS spatial database to be applied in a real city environment.4. The model as kernel, a computer software is developed to simulate urban pedestrian flow dynamic evolution using Object-Oriented Design (OOD) and Object-Oriented techniques. The software platform makes it possible to calculate and visualize urban evolution in real-time. Thus, it can be regarded as the "Virtual Laboratory" for the exploration of dynamic evolution of complex urban pedestrian flow system.5. Dynamic evolution behaviors of the urban pedestrian flow are explored thoroughly using the software system. And through the experiments, some principles and characteristics for urban pedestrian flow are testified or educed. The experiment cases include pedestrian flow simulation Shanghai Stadium and Tongji University. And both result is satisfy.In a word, the main contribution in this dissertation include: 1.Inspired by the theories of complex system, a bottom-up mode model framework for complex urban pedestrian flow system simulation is put forward; 2.In the light of conceptual model, a delicate urban dynamic model is constructed; 3.And corresponding computer software system is developed; 4.Furthermore, the...