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According to Beijing agriculture and countryside current situation, Beijing suburban natural resources and socio-economic information management platform was built to improve efficiency and effectiveness of decision-making of rural development, modern city agriculture and rural comprehensive information service system, and further integrate and develop rural information resources. Structure and content...
Air temperature is one of important environmental phenomena with both spatial and temporal characteristics. In order to realize spatial-temporal interpolation at any point in space-time field, a kind of practical product-sum covariance for spatial-temporal modeling is chosen for monthly average air temperature in the three provinces (Heilongjiang, Jilin and Liaoning Province) of Northeast China from...
Accurate evaluation and prediction of the potential impact of climate change on crop production is essential to the sustainable development of a country's agriculture. Model variations plus uncertainties in the future climate change scenarios create a big challenge for such evaluation. In this work, we developed a statistical crop model using the historical yield data between 1981–2010 from the National...
This paper introduces the application of web 3D GIS (Geographic information system) for dam-break flood modeling, including dynamic 3D visualization and spatio-temporal analysis. Distributed virtual scene modeling method was firstly introduced. Then the system framework was proposed. Meantime some key technologies including the collaborative workflow, mobile agent computing service and simulation...
This topic using SPSS software guangan of 1999 ∼ 2009 data of land change the correlation analysis, and the cultivated land and other land factor analysis of the relationship, and concludes that the long-term impact of cultivated land change the most main factor is construction land. Through the use of a linear regression model to construction land and land related analysis, and the use of a linear...
A quantitative dynamic knowledge model for evaluating the stability and analyzing the fluctuations of crop production was established in this study based on the results of farmland ecosystem stability and fluctuation of crop output. This dynamic model was combined with the technology of B/S distributive network structure and information management platform based on WebGIS to establish a Farmland Ecosystems...
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