The distribution in discharge space, time change of electric field intensity, electron and ion density and the current density are calculated.
分别计算和分析了介质阻挡放电中电场、带电粒子浓度以及电流密度在放电空间的分布和随时间的演变过程。
Using monitored data of air sulphation speed for 1989-2003, the space-time change in (Xi 'an) City is analyzed.
依据1989—2003年监测数据，分析了西安市大气中硫酸盐的时空变化。
Distribution of soil erosion has obvious characters of space-time change. Researching its space-time change law has important significance for scientific prevention of soil erosion.
土壤侵蚀分布具有明显的时空变化特征，研究其时空变化规律对于科学地进行土壤侵蚀防治具有重要意义。
Through sampling soils of different years and depth in the reclaimed areas of Fushun coal mine, we analyzed the space-time change of soil nutrients and organic carbon.
以素有煤都之称抚顺矿区复垦土壤为例，对不同年限不同深度的土壤进行分析，揭示了抚顺煤矿区土壤养分的时空演变规律。
Through sampling soils of different years and depth in the reclaimed areas of Fushun coal mine, we analyzed the space-time change of soil nutrients and organic carbon.
以素有煤都之称抚顺矿区复垦土壤为例，对不同年限不同深度的土壤进行分析，揭示了抚顺煤矿区土壤养分的时空演变规律。
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