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。
Comprehensively analyse the date of survey and test in soft ground. A method of assessing the stress history of soft clay by Vane Shear test (VST) is induced.
通过对软土地基勘察试验成果的综合分析，归纳出用十字板试验评价软弱粘性土层应力史的方法。
The application of sample survey method in history research is analyzed.
方法：对项目点北碚区进行抽样调查。
The application of sample survey method in history research is analyzed.
方法：对项目点北碚区进行抽样调查。
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