以容积率为核心的开发强度指标是土地高效使用和公共利益保障双向绩效的综合考量和核心所在。当前控规中开发强度指标确定存在着的依据性不强、价值取向片面、适应性欠缺等问题，使得土地资源无法得到合理使用，公共利益受到损害，导致控规操作频频失效。对于众多已经或即将进入快速发展建设时期的西北地区大中城市新区，过高强度开发的侵占公共利益和过低强度开发的隐性囤地现象并存，开发强度的控制尤为紧迫。本课题以兼顾土地使用效率和公共利益为绩效目标，对已建地块及片区不同层面与开发强度密切相关的各种因子的绩效进行分析与评价，建构反映地块自身和片区对地块影响的因子与开发强度指标的数理模型，确定地块开发强度值域范围，并将其转化为易于操作的视窗系统。通过选取典型案例进行可行性验证，最终提出经济效益与公共利益双赢的适于西北地区大中城市新区的开发强度"值域化"控制方法，以增强控规的科学性与可操作性、促进西北地区城市的科学发展。

The development intensity whose core is the floor area ratio, is the comprehensive consideration and the core of the two-way Perspectives which are efficient land use and public interests protection. Current ways to formulate the development intensity have many problems, such as the weak basis, one-sided value orientation, the lack of adaptability and so on. That can not get the rational use of land resources, and damage the public interest, then lead to the operation of regulatory control is frequently invalid. For many new area of large and medium-sized cities in Northwest zone, which have been or are about to enter the period of rapid development, The phenomenon that too high intensity development of misappropriation of public interest and too low intensity development of the hidden hoard is more prominent. Therefore, the control of the intensity of development is particularly urgent. This topic takes the efficiency of land use and public interest as the Achievements objectives. By analyzing and evaluating the performance of factors which are closely related to built land and area at different levels, it constructs a mathematical model to reflect the impact of land and the surrounding, and then determines the range of land development intensity, and translate them into a convenient windows system. By choosing some typical cases to test, the study finally puts forward a Win-win "Interval Form" control method of development intensity, suitable for new area of large and medium-sized cities. The method will enhance the scientific and operability of regulatory detailed planning, to promote the scientific development of cities in northwest region.