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In this paper, we present a wavelet-based multigrid approach to solve the perturbation equation encountered in optical tomography. With this scheme, the unknown image, the data, as well as the weight matrix are all represented by wavelet expansions, thus yielding a multiresolution representation of the original perturbation equation in the wavelet domain.(More)
This article may be used for research, teaching and private study purposes. Any substantial or systematic reproduction, redistribution , reselling , loan or sub-licensing, systematic supply or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents(More)
This work presents a method for plant species identification using the images of flowers. It focuses on the stable features of flowers such as color, texture and shape. K-means clustering is used to extract the color features. Texture segmentation is done using texture filters. Edge detectors are used to trace the boundary of the image and hence the shape(More)
In this paper, the four integral identities satisfied by the fundamental solution for elasto-static problems are reviewed and slightly different forms of the third and fourth identities are presented. Two new identities, namely the fifth and sixth identities, are derived. These integral identities can be used to develop weakly singular and nonsingular forms(More)
Acoustic manipulation has been widely studied and applied in many research and industry fields. Recently Surface Acoustic Wave (SAW) technology, because of its energy concentration and easy integration, has become more and more popular in microfluidics. In this paper, we fabricated our SAW chips and setup a SAW-based acoustic manipulation system. To study(More)
PUBLICATIONS AND MANUSCRIPTS Peer reviewed publications 1. Z. Chen, S. Nadarajah (2014) " On the optimally weighted z-test for combining probabilities from independent studies ". Computational Statistics and Data Analysis, 70: 387–394. 2. Z. Chen (2013) " Association tests through combining p-values for case control genome–wide association studies ". (2013)(More)