Qingyang District

For the pure technical efficiency , comparing the number of districts of which DEA is relatively effective with that of districts of which comprehensive efficiency is relatively effective , Qingyang District of Chengdu and Kuancheng District of Changchun are added .

从纯技术效率的角度来看，DEA相对有效的城区与综合效率相对有效数相比，增加了成都市青羊区、长春市宽城区。

The research results may not only enrich the modern service industry theories , but also provide the scientific basis to formulate modern service industry developmental strategy , the industrial support policy , and promotion of the city core competitive power in Qingyang District and even in Chengdu City .

研究结果不仅可以丰富现代服务业的相关理论，而且可以为青羊区乃至成都市完善现代服务业产业发展战略和产业扶持政策，提升城市核心竞争力提供科学依据。

A Study on the Charge Standard of Agricultural Machinery Work in Qingyang District

庆阳地区农机作业收费标准研究

The impact of combination of dissolved pore-intergranular pore on ultra low permeability reservoir physical property : an example from Chang 8 reservoir of Qingyang district in Xifeng Oilfield

溶孔-粒间孔组合对超低渗透储层物性的影响&以西峰油田庆阳区长8油层为例

Sunken cave dwelling is an unique form of raw-soil cave dwelling in the Loess Plateau of our country , which is mainly distributed in western Henan province , Shaanxi province north of the Weihe River , eastern Gansu Qingyang district and southern Shanxi Yuncheng prefecture .

地坑窑民居是我国黄土高原地区一种独有的生土窑居形式，主要分布在豫西地区、陕西渭北一带、甘肃东部庆阳地区、山西南部运城地区。

As the unrest of war and changes of culture and dynasties , lots of national research materials about Qingyang were lost in the history , also it makes us inconvenient to study about the ancient national development conditions around Qingyang District .

由于战争动荡、文化变革、朝代更迭等原因，许多关于庆阳地区民族状况的史料堙没无存，这为我们研究庆阳地区古代民族发展状况造成了诸多不便。