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This paper focuses on an experimental investigation of arc plasma in a liquid metal current-limiting device based on pinch effect. A specially designed experimental setup is employed to observe the dynamic process of arc initiation and arc evolution. From the frames obtained by high-speed photography, the mechanism of arc initiation is revealed. It indicates that the arc ignites due to the self-pinch...
According to defocus imaging theory, the amount of blur in the defocus images varies with depth of the object in the scene. So depth in the scene can be recovered by estimating the blur with the knowledge of the lens parameters. A novel application of the total variation principle is made for the estimation of the amount of blur in the defocus images. Three main processes are included: the process...
In this paper, a linear method is proposed to determine the distance according to RSSI, which avoids the traditional disadvantages of low effectiveness, high cost greatly. And two measures, first and second filtering, are taken to discard all the incorrect information and improve the accuracy for location.
The transport-of-intensity equation describes the internal relationship between the intensity and phase distribution while wave is propagating in the mobile space. So the phase distribution can be solved by the use of the equation. It is an important measurement of non-interferometry. A new phase retrieval based on transport-of-intensity equation is presented. This method has the advantage of measuring...
The evaluation of course design performance is very important for universities to manage students' practical teaching performance effectively. Aim at such drawbacks of conventional evaluation methods as more dependence on teachers' experience and subjective estimation, difficult to evaluate accurately, the paper presented a performance evaluation method based on rough set theory. Where, firstly the...
On-line handwritten signature aligning is crucial in verification. This paper deals with this aligning as an optimization problem. By transforming the squared Euclidean distance based DTW distance in terms of geometric transformations including rotation, scaling and translation, corresponding optimal objective functions are formulated and solved in closed form. Subsequently, an iterative optimization...
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