<正>采用2002年QuiekBird遥感数据和地面调查数据，选用反映城市绿地建设水平的绿化覆盖率、绿地率、人均公共绿地、面积指数、多样性指数、均匀度指数、破碎化指数、绿地廊道密度指数8项数量质量指标，应用古林方法和模糊评阶方法，对乌鲁木齐市及4个主要建成区城市绿地建设情况进行系统评价。结果表明：乌鲁木齐市及其各主要建成区城市绿地建设总体水平处于中等偏上，水磨沟区最好，新市区次之，沙依巴克区再坟之，天山区最差。今后应加强乌鲁木齐市荒山绿化和废矿区地面绿化，尽可能连接中小型绿地，以便更好地发挥城市绿地的重要作用。

The rotors’ profiles of screw pumps were complicated generally,and their basic profiles were several kinds of cycloids. There were several methods about the deduction of equations of rotors’ profiles, e.g. as the way of geometry, the analytics,etc. Vector algebra was adopted to deduce the equations of the rotors’ cycloid profiles of<135>three screw pump. The equations included the whole deducing course about the parameter equations of theoretical and practical rotors’ profiles and the ranges of parameter values. Intermediate course and relative concept was explained too. It was found that this method was simple and the steps were dear. It was suitable for engineers and technicians to understand and apply it.