中文摘要：

有效的功能分区是城市系统健康有序发展的保障。本文构建评价指标体系，采用系统聚类分析方法，在功能分区视角下将西安市九个辖区分为核心区、雁塔区、未央区、长安区、灞桥区及临潼一阎良区六个功能区域。中心商务区主导下核心区商贸流通业发达，高新技术产业开发区与曲江文化产业示范区主导下雁塔区技术经济与文化产业特色鲜明，经济技术开发区主导下未央区工业经济特征明显，郭杜教育科技产业开发区与国家民用航天产业基地强化长安区科教文化发展方向，泸灞生态区彰显灞桥区生态经济发展特色，生态农业区、阎良飞机城加快临潼、阎良两区传统农业发展转型。功能分区及发展空间分异是城市化与经济发展、历史基础与路径依赖、规模经济与集聚效应、本底化与特色化等基础因子以及新经济与开发区建设、宏观调控与政策导向等新型因子综合驱动的结果，基础因子起缓慢影响与逐渐推进的辅助作用，新型因子起突变影响与直接推动的主导作用。研究有助于科学认识城市，合理组织城市，提供实践参考。

英文摘要：

Effective urban function partition is the guarantee of the development of a healthy and orderly urban system. Based on the panel and serial statistical data, urban functional zoning and the spatial differentiation in Xi＇an have been researched by hierarchical cluster analysis method. Nine districts of Xi＇an are divided into six functional zones consisting of the core zone, Yanta, Weiyang, Chang＇an, Baqiao and Yanliang-Lintong. Their main development directions are as follows. The core zone which functions as the central busi- ness district is characterized by its developed commercial circulation. Yanta District with Xi＇an High-tech Industrial Development Zone and Xi＇an Qujiang National Culture Industry Demonstration Zone are characterized by their technological economy and cultural indus- try. Weiyang District is characterized by Xi＇an Economic and Technological Development Zone and its industrial economy. Chang＇an District is featured by its industry of science, technology and education, which is strengthened by Guodu Industrial Development Zone of Education, Science and Technology and Xi＇an National Civil Aerospace Industry Base. Baqiao District is characterized by its development of ecotourism and ecological agriculture area. Xi＇an Yanliang National Aviation High-tech Industrial Base and ecological agriculture in Yanliang-Lintong area promote the transition of this area＇s traditional agriculture. In addition, this paper discusses the driving factors of urban functional zoning and their spa- tial development differentiation, and explains the comprehensive functions of the primary factors such as urbanization and economic development, historical basis and path depend- ence, scale economy and accumulative effect, localization and differentiation, and the new factors such as the construction of new economy and development zones, macroeconomic regulation and policy orientation and so on. The primary factors, as auxiliary function, can affect and propel the process to a certain degree, while the