Youliang Chen

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The PoYang Lake is the largest fresh lake in China, also a national famous place of commodity grain. But on the other hand, flooding disaster happens frequently, and the economic loss caused by flood is extremely huge. In order to reduce the loss caused by the flooding disaster, it is necessary to monitor the flood disaster situation in PoYang Lake area.(More)
Displaying map data at scales smaller than its source can result in objects that are either too small to be seen or too close to each other to be distinguishable. Furthermore, map conflicts become more likely when certain map symbols are no longer a true scale representation of the feature they represent. Map generalization involves careful examination of(More)
It is a complex and challenging problem to evaluate the manufacture efficiency of mechanical slicer. Based on the grey relational theory, different evaluation models and algorithms for the manufacture efficiency of mechanical slicer are reviewed in the paper and then a novel grey relational theory-based model is proposed. A numeral example is given to prove(More)
Advisor Date ii ACKNOWLEDGMENTS First of all, I would like to express my special appreciation and thanks to my Advisor, Professor Xiaoyan Han. You have been a tremendous mentor for me. I would like to thank you for encouraging my research and for allowing me to grow as a research scientist. Your knowledge and logical way of thinking have been of great value(More)
Nowadays spatial relationships are widely used in more and more aspects in Geographic Information System. However, in the process of spatial database updating, due to updating period inconsistent of spatial objects, there often lead to spatial conflicts. In addition, in the field of computer cartography, map data are usually derived from a source that is(More)
The complex behaviour of fine-grained materials in relation with structural elements has received noticeable attention from geotechnical engineers and designers in recent decades. In this research work an evolutionary approach is presented to create a structured polynomial model for predicting the undrained lateral load bearing capacity of piles. The(More)
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