Conclusion It is an effective method to use multi - source proliferation mathematical model for studying the pollutants exposure concentration in atmosphere of the health survey region in history.
结论利用多源扩散数学模型是研究健康调查区域内大气污染物历史暴露浓度的一种可行方法。
The production model and method of application digital technique of surveying and mapping into the survey of building property map are expounded in the paper.
本文论述了应用数字化测绘技术测量房产图的生产模式和方法。
Field gravity survey was an important method of gravity field model optimization.
野外重力测量是精化全球和局部重力场模型的重要手段之一。
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