122 soil samples were collected in farmland of Jilin Province, analyzed the pollution situation of 6 kinds of heavy metals by the pollution index method, the geo-accumulation index method and potential ecological risk. The results showed that: according to Nemero pollution index, there are 1.64%, 8.20%...

The balanced layout of emergency shelters, which can be measured by spatial accessibility, is an important component of the urban disaster prevention and mitigation system. Among the various research methods, the two-step floating catchment area method (2SFCA) is a more comprehensive and convenient way....

On the basis of proposing a vector autoregressive model, this paper analyzes the dynamic relationship between tourism industry development and urbanization process in Guizhou Province through Johansen cointegration test, variance decomposition and so forth. The results indicate that there exists a long-term...

Taking the database of land use current situationin Jinshi City as the information source, the unit grid of 1km × 1km of whole Jinshi City is constructed through the processing and conversion of the database by using ArcGIS. The comprehensive ecological risk index in the unit grid is established based...

This paper uses the Xilin Gol League as a research area, based on Landsat TM and meteorological data for the past 15 years, selects three periods of remote sensing images to use RS, GIS technology and dynamic degree and landscape index to select the landscape pattern and desertification dynamics of sandy...

In order to provide effective guide for on-site ventilation of heating pipeline confined space and ensure safety of the workers, the influence of the vents position, the vents numbers, the ventilation air volume and the mixed ventilation on the ventilation effect are studied by scale model test. According...

At present, the prevention and control of heavy metal pollution in soil has become a hot issue in environmental management. Industrial Parks are the harder-hit areas of heavy metal pollution in soil. Early warning of heavy metal pollution in soil is an effective way to prevent the risk of heavy metal...

The problem of ecological environment is a global problem. It is a basic material condition for human beings to survive and engage in various production practices, and has a tremendous impact on our economic and social life and development. In recent years, the overall situation of the ecological environment...

In order to better build the ecological environment of guizhou province, accelerate the marketization and capitalization of guizhou province's ecological resources, and evaluate and study the construction level of guizhou's ecological civilization. This paper, by using intuitionistic fuzzy analytic hierarchy...

At present, industrial parks are the harder-hit of heavy metal pollution in soil. Heavy metal pollution in soil has seriously affected the sustainable utilization of land and the security of people's living environment. In industrial parks that involve a large number of companies, the key to prevent...

In this paper, the tail distribution of pork market price fluctuation is fitted effectively based on the peaks over threshold (POT) model, and the Generalized Pareto Distribution (GPD) of extreme risk is obtained, and VaR (value at risk) method is introduced to measure the extreme risk of price fluctuation.Results...