The result shows that the risky area is closely related with not only the source term,but also the meteorological conditions and the time after the accident;the high concentration zone spread near the leaking point under the unstable and strong winding meteorological conditions,while,the high concentration zone not only lasts for a long time,but also has the transportation function under the.

It is very complex engineering system for the emergent assistance at the leaking accident of the toxic and harmful gas,and the key to the settlement of the question lies the right determination of the potential risky area.

The systematic analysis and its forewarn mechanism of project regional risk;

A Study on the Response Policy Choice for the Project s Regional Risk Based on the Resource Restriction;

Based on the theory of quantitative risk assessment, a regional risk assessment (RRA) method was put forward.

Systematic analysis on China s regional disparity of tourism development;

Analysis on Regional Disparity and Convergence of TFP Change in China's Information Service Industry

Analysis on regional disparity of energy utilization efficiency:Gini coefficient in China

Empirical research on regional differences in rural urbanization:a case study of Jiangsu Province;

Regional difference of cropping-animal husbandry system and its developmental trends at intensive farming region in the Changjiang River Delta.;

The development stages and trend of population ageing and its regional differences in China;