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Papers by xiaoming chen

Composites Science and Technology, 2004

We present the results of a computational investigation on the effect of microstructure on the (s... more We present the results of a computational investigation on the effect of microstructure on the (spatial and statistical distribution) of interface stresses in transversely loaded continuous fiber-reinforced composites. Instead of traditional unit-cell models, we use a parallel implementation of the boundary element method (BEM) to analyze large representative volume elements (RVEs) containing up to 144 individual fiber cross-sections placed within

1ABSTRACT Inthe last few years it has been shown,by several,authors and in a variety of tests and... more 1ABSTRACT Inthe last few years it has been shown,by several,authors and in a variety of tests and applications that Network RTK solutions are superior to classical single baseline RTK solutions. Today Network RTK is a widely accepted technique and therefore an increasing number ,of organizations are establishing networks ,providing real-time corrections from a reference ,station network. Basically two different techniques

Journal of Global Positioning Systems, 2002

Proceedings of The IEEE, 2002

ABSTRACT The use of reference station networks has become the ubiquitous solution for high precis... more ABSTRACT The use of reference station networks has become the ubiquitous solution for high precision satellite positioning applications. The main systematic errors affecting the RTK rover performance are multipath, atmospheric and ephemeris errors. Whereas single ...

IEEE Transactions on Consumer Electronics, 2008

In video communication based consumer device applications, the compressed video is extremely frag... more In video communication based consumer device applications, the compressed video is extremely fragile to transmission errors due to channel noise. Error Concealment (EC) is an efficient way to recover a damaged video sequence. The existing EC algorithms for compressed video typically apply uniform EC mode to entire video sequence regardless of frame features, or lack in sensible mode-switching considerations. This paper proposes a new Dynamic Multimode Switching (DMS) EC algorithm. The proposed algorithm provides several EC modes for intra-and interframes. The proposed smart decoder is able to adaptively apply these modes in different situations. The mode switching in DMS depends on the spatial/temporal correlation, estimated edge features of the corrupted Macroblock (MB), the smoothness of the reconstructed MB and etc. The proposed DMS algorithm has been evaluated and compared with 3 classical EC algorithms. The experimental results show that the DMS algorithm can achieve significant gains in Peak Signal Noise Ratio (PSNR) and therefore improves the decoded picture quality in video applications. 1

Composites Science and Technology, 2004

We present the results of a computational investigation on the effect of microstructure on the (s... more We present the results of a computational investigation on the effect of microstructure on the (spatial and statistical distribution) of interface stresses in transversely loaded continuous fiber-reinforced composites. Instead of traditional unit-cell models, we use a parallel implementation of the boundary element method (BEM) to analyze large representative volume elements (RVEs) containing up to 144 individual fiber cross-sections placed within

1ABSTRACT Inthe last few years it has been shown,by several,authors and in a variety of tests and... more 1ABSTRACT Inthe last few years it has been shown,by several,authors and in a variety of tests and applications that Network RTK solutions are superior to classical single baseline RTK solutions. Today Network RTK is a widely accepted technique and therefore an increasing number ,of organizations are establishing networks ,providing real-time corrections from a reference ,station network. Basically two different techniques

Journal of Global Positioning Systems, 2002

Proceedings of The IEEE, 2002

ABSTRACT The use of reference station networks has become the ubiquitous solution for high precis... more ABSTRACT The use of reference station networks has become the ubiquitous solution for high precision satellite positioning applications. The main systematic errors affecting the RTK rover performance are multipath, atmospheric and ephemeris errors. Whereas single ...

IEEE Transactions on Consumer Electronics, 2008

In video communication based consumer device applications, the compressed video is extremely frag... more In video communication based consumer device applications, the compressed video is extremely fragile to transmission errors due to channel noise. Error Concealment (EC) is an efficient way to recover a damaged video sequence. The existing EC algorithms for compressed video typically apply uniform EC mode to entire video sequence regardless of frame features, or lack in sensible mode-switching considerations. This paper proposes a new Dynamic Multimode Switching (DMS) EC algorithm. The proposed algorithm provides several EC modes for intra-and interframes. The proposed smart decoder is able to adaptively apply these modes in different situations. The mode switching in DMS depends on the spatial/temporal correlation, estimated edge features of the corrupted Macroblock (MB), the smoothness of the reconstructed MB and etc. The proposed DMS algorithm has been evaluated and compared with 3 classical EC algorithms. The experimental results show that the DMS algorithm can achieve significant gains in Peak Signal Noise Ratio (PSNR) and therefore improves the decoded picture quality in video applications. 1

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