Base on the analysis of urbanization in Jiangxi province, urban efficiency of eleven cities is analyzed quantitatively with the application of urban efficiency index, and regional difference regular of urban efficiency are concluded, and the correlation analysis research of urbanization level and the city efficiency are conducted.

City competitiveness largely hinges on urban efficiency that is reflected in labor markets, land markets, capital markets, and provision of urban infrastructure.

With the application of urban efficiency index, this article analyses quantitatively urban efficiencies of fourteen cities in Anhui province and concludes regional difference regular of urban efficiencies.

Self-organization Theories of Urban System;

With technologies of java-swarm simulation, this paper simulates urban system from.

At first,this paper discusses the relationships among urban system,urban spatial structure,and complexity studies.

The main characteristics of complexitywith city system have been revealt based on Science of Complexity.

As a kind of exoteric complex huge system, City system consist of substantial and non-substantial elements, include natural, social, economic and cultural elements, which has the self-organization character expressing in the course of gaining the order and complicated structure in space, time and function.

City system is a typical immense system, and analysis, research, planning and management of city system should be performed in view of huge system.

This paper studys the the urbanization efficiency of China\'s provinces,from both active and passive perspectives,based on DEA.

The sustainable administration for urban water system;

Evaluation of environmental sustainability for urban water systems based on LCA framework;

Research on Urban Water System Operating Efficiency;