The History Evolution And Develop Of Urban Complexity

Urban always is one of the core research fields of the geography, economics, and sociology. Urban is replacing villages to become the main habitation of mankind, and their factor, constitutions, structures, functions and evolutions just become more and more complex. Following the development of science and technology, people's understanding and research of the urban system complexity also deepen continually.Most of the pro-researches of urban systems in economics, sociology, ecology etc., used to adopt the reductive methods, and focus on partial and local characteristic study of urban system. We should think that the essence of city can comprehend for the material space crunodes which is given a certain spirit attribute, be made by the mankind, and be the carriers and the body which deeply be subjected to a mankind's society. It is a living top of responds chains of social activities and mankind, a product in space-time integral of our residents' behavior and the most vivid portrayal of our social activities.By the research toward the urban social space structure and the research of complexity science paradigm, following macrocosm, systemic and comprehensive view, and this paper make use of the city geography, city economics, city planning, system science, complexity science etc and research the complexity of urban system.This paper includes seven chapters.Chapter one: for introduction. It points out the backgrounds and gist, the purposes and purports, the methods and technique routes. Finally, it discusses the study summarize of overseas and homeland.Chapter two: the research in complexity of the urban and urban spatial Structure. First, it put forward the content of urban complexity and the drive mechanism of urban system complexity following the urban hypostatic research; secondly it discusses the complexity of urban spatial structure and indicates that the origin of the urban is derived from the person's complexity.Chapter three: the research foundation of the urban history cultural special features block. It researches the concept, characteristic, constitute and purport of the urban history cultural special features block and put forward the organization characteristic of the urban history cultural special features block.Chapter four: the background analysis of the Xian history cultural special features block. First, we have a brief introduction for the location of the Xian history cultural special features block; secondly, we research it's the past history; thirdly, we discuss the folk habit of it; Finally, passing to its comprehensive research, we put forward to the theoretic that is society tetrahedron space structure of the Xian history cultural special features block.Chapter five: the evolvement model which is based on the CA theories of the urban space structure. Firstly, it introduces the definition, characteristic and composing of CA theories; secondly, we manage the CA model to Xian history cultural special features block; finally, we analyze the result of the evolvement model, and form a countermeasure for the urban space structure.Chapter six: the complexity of Xian history cultural special features block. Firstly, it researches the surface concept of the districts complexity and put forward some characteristic; then we research the content of complexity, excogitate the method of the complexity research and discuss the constitute and function; Finally, it research the drive mechanism of complexity, excogitating the mechanism which include nonlinear, multi-feedback, competition and synergy, self-organizing, which is between in urban space and environment.Chapter seven: conclusion. It summarizes the paper, excogitate the advice and put forward the next way of research.