Biomedical subjects

Shengtong Cheng

Publications and source records attributed to Shengtong Cheng.

3 recordsLinked to original sources

PubMed2003

[Extract non-point pollution source information from a TM image by hierarchical classification].

The issue of the article is hierarchical classification that is used to extract land-use information relating to non-point source pollution from TM image. The result shows that it performs better than traditional maximum likelihood method. It is useful to extract information quickly and effectively with advantages of simplifying complex problem, giving prominence to key point and having more flexibility.

Agriculture↗

PubMed2003

[An artificial neural network model for lake color inversion using TM imagery].

The technology of artificial neural network was used for inversing water quality parameters from TM imagery data in the paper in order to study water quality and eutrophic status of lake. On the basis of satellite synchronous monitoring experiment, a BP neural network model was constructed, in which concentrations of SS, CODMn, DO, T-N, T-P and chlo-a were inversed from Landsat TM data and the accuracy of which was good, the relative error of which could be controlled below 25%. Moreover, the reasons of simulating error, ways of improving model and applications of the model were also analyzed in detail. The results of this research told that based on a small-scale of satellite synchronous experiment, the model could be applied successfully in investigation, analysis and estimation of lake water quality.

Color↗

PubMed2003

[Development of MOIMS on environmental data distribution].

'Environmental WebGIS system for Ganjiang Watershed', based on 1:250,000 topographic spatial database and environmental database of Jiangxi province, was developed. In the system, a hybrid strategy was adopted. And the GIS analysis functions of MapObjects and Map server functions of MOIMS were integrated in the system. Users can use GIS functions, such as zooming in, zooming out, panning, making theme maps, finding geographic objects by environmental attribute values etc., through web browser on the client computers. With the application of the WebGIS system, expanding the GIS users' range, making the GIS operation easily, and assistanting environmental management and decision can be completed.

Environmental Health↗