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BACKGROUND Spectral processing and post-experimental data analysis are the major tasks in NMR-based metabonomics studies. While there are commercial and free licensed software tools available to assist these tasks, researchers usually have to use multiple software packages for their studies because software packages generally focus on specific tasks. It(More)
Acoustoelasticity provides a significant method for testing the residual stress on the mechanical components. This leads to use the ultrasonic methods to detect residual stress. However, the influence on the detection precision resulted from the uneven thickness of tested components and the inaccurate stress coefficient obtained by the tensile experiment(More)
According to the theory of elasticity, this paper proposes a new method to measure the residual stress of components based on the critical refraction longitudinal wave (LCR). The expression model of stress in different depth layers was studied, and the residual stress gradient of different layers was detected by ultrasonic probe at different frequency, and(More)
In this paper, we propose a new shape decomposition method based on visual perception for shape matching and retrieval which uses the protrusive corners under multiple scales. Our approach composes of a multi-scale shape decomposition procedure and a contour segments matching procedure. Firstly, morphological operations are used for more stable and visual(More)
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