左云

利用K-Ar年代学方法，对山西左云地区第三纪火山岩剖面进行了初步精细定年。

By K-Ar chronology , we have preliminarily attempted on careful dating for a Tertiary volcanic profile in Zuoyun , Shanxi Province .

介绍了短时局地暴雨的监测和左云县气象站点要素演变，对天气形势、加密观测资料和多普勒雷达资料进行了分析。

Analysis and Monitoring of the Local Short-time Rainstorm of Zuoyun County with Single Element Rainfall Station and Doppler Radar ;

其次，针对山西大唐国际左云风电项目及该风电场投运风机最大功率跟踪的实际应用情况，分析了双馈异步风力发电机额定风速以下的最大功率跟踪控制方法。

Secondly , for a practical application in Shanxi Datang International Zuoyun wind power farm , the control method of maximum power tracking is analyzed under rated wind speed for a double fed wind induction generator .

介绍了左云县污水处理厂采用国产曝气转盘氧化沟的设计参数、工艺流程以及设备选型情况，并指出了氧化沟系统在运行中应注意的问题。

This paper introduces the design parameters , technical process and equipment type selection of the domestic aeration rotary disk oxidation ditch adopted by the Sewage Treatment Plant of Zuoyun County , and puts forward some problems needing attention in the operation of the oxidation ditch system .