Yuanqiao Wen

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This paper describes the framework of a numerical model coupling system based on distributed computing environment by using mobile agents. The multi-layered system provides a flexible shared workspace for the cooperation of multidisciplinary researchers in geophysical modeling and makes it is possible for the researchers to implement the numerical model(More)
Considering vehicles in highway as surveillance object, the paper proposes a detection-location framework based on homography planar projection. The proposed work allows vehicle' position, speed value and direction angle in physical scale to be accessed. Different from the traditional detection, our detection part employs background modeling and detector(More)
According to the features of the high temperature's impacts on inland shipping, the impacts were divided into light, moderate and severe level. Based on the series data of temperature time in seventeen stations which near the coastal area of Middle Yangtze River during the period between 1965 and 2008, the characteristics of climate variations influenced by(More)
a coupled atmosphere-wave-ocean model is used to evaluate the effect of sea surface roughness on ocean surface wave, observational studies about the sea surface roughness are parameterized in the coupled model, a typical typhoon case Vongfong (No. 0214) is chosen to examine the effect of sea surface roughness on typhoon wave modeling. The results indicate(More)
A new tree approximation based on contourlet transform is proposed in this paper. Contourlet transform produce a simple and effective representation frame for geometrical image by employing Laplace-pyramid decomposition and followed by direction filter bank (DFB). However, the redundancy of contourlet constrains its application in image representation.(More)
A unified detection-tracking-estimation vision navigation system and algorithms framework for position and pose estimation of UAV (unmanned aerial vehicle) is proposed in this paper. The major contribution of this work is a novel cooperative object detection algorithm for robust detection of UAV: the spatial color pattern and temporal flicking pattern of(More)
With the rapid development of e-commerce, security issues are arising from people's attention. The security of the transaction is the core and key issues of the development of e-commerce. This paper about the security issues of e-commerce activities put forward solution strategy from two aspects that are technology and system, so as to improve the(More)
a coupled atmosphere-wave-ocean model is used to evaluate the effect of sea surface roughness on typhoon wind fields, observational studies about the sea surface roughness are parameterized in the coupled model. A series of numerical experiments is conducted for a typical typhoon case Rananim (No. 0414) to examine the effect of sea surface roughness on(More)