Qinghai Lake is the largest saline lake in China. The change in the lake volume is an indicator of the variation in wate......

Biocrusts affect soil detachment through above-ground(top crust\'s surface covering)and below-ground(sub-crust\'s bi......

Acetochlor is a widely used herbicide in agricultural production.Studies have shown that acetochlor has obvious environm......

Analysis of the climatic characterization of potential evapotranspiration (ETp) is significant for understanding the imp......

基于丹尼森算法运用省区面板数据测算了1990-2008年教育对区域农村经济增长的贡献率,并进行区域差异比较。结果发现：（1）区域间教育对......

对应用产出增长型生产函数计算科技进步贡献率时的前提假定和约束条件进行了本质性分析，给出了经济数学的解释，并讨论了减少计算误差......