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The flame temperature distribution measurement is very important for the combustion diagnosis. This paper presents a fast inversion method for 2-D flame temperature distribution reconstruction. Two orthogonal-arranged focused light field cameras are used to acquire the radiative intensities of the flame in different directions. The general source multi-flux method is chosen as direct solving model...
The environment in a Martian dust storm is critical to the operation of Mars airplanes and rovers due to high speed dust which may cause surface abrasion and equipment failure. In this work, a Martian dust storm simulation wind tunnel (MDSSWT) is designed and numerically investigated. This facility would be capable of performing simulation of the environment inside a Martian dust storm for ground-based...
In this paper, we propose a simple but effective specular highlight removal method using a single input image. Our method is based on a key observation - the maximum fraction of the diffuse color component (so called maximum diffuse chromaticity in the literature) in local patches in color images changes smoothly. Using this property, we can estimate the maximum diffuse chromaticity values of the...
This paper presents a thermal model of a certain permanent-magnet synchronous motor over its entire operating range. An experimental setup was designed and a series of experiments have been conducted to obtain the thermal power of the motor on various speeds and torques according to the input-output measurement principle. A regression model of the thermal power was proposed based on the support vector...
This paper presents a design of a permanent-magnet synchronous motor (PMSM) casing with organic phase change material (PCM), paraffin, stuffing to absorb and store the heat produced by the motor so as to prevent the motor temperature from sharp increase or decrease, and more important to avoid the motor from overheating. The paraffin is filled in the hollow motor casing on which some cavities are...
We are conducting a wide range of research on graphene and related two-dimensional materials from basic physics to device applications towards their electronics/photonics applications. In this paper, we review our recent research activities on the growth and functionalization of graphene, hexagonal boron nitride, and transition metal dichalcogenides with the emphasis on the following four topics;...
This paper proposes a coordinated control strategy of the rotor side converter (RSC) and grid side converter (GSC) of the doubly-fed induction generator (DFIG) based wind generation systems under unbalance voltage conditions. Mathematical models and system behaviors of the RSC and GSC under unbalanced voltage are illustrated. The reason why the rotor side converter has its limitation can be obtained...
In the theory of the concept lattices, the structure of a concept lattice is the base of data analysis and is very important. This paper mainly constructs two kinds of new concept lattices using the approximation operators “ □” and “◊” respectively. And also studies the relations among new concept lattices, object-oriented concept lattice, property-oriented concept lattice and complementary concept...
In this paper, a random rough subspace based neural network ensemble method is proposed for insurance fraud detection. In this method, rough set reduction is firstly employed to generate a set of reductions which can keep the consistency of data information. Secondly, the reductions are randomly selected to construct a subset of reductions. Thirdly, each of the selected reductions is used to train...
Inspired by the theory of rough sets, this paper studies formal contexts from the viewpoint of approaximation operators. Firstly, a pair of approaximation operators are proposed based on a formal context, and the corresponding concept latices are constructed. Then, the relationship among these two lattices and the original concept lattice, the concept lattice of the complement of the original formal...
In this paper, we propose a new method to construct an edge-preserving filter which has very similar response to the bilateral filter. The bilateral filter is a normalized convolution in which the weighting for each pixel is determined by the spatial distance from the center pixel and its relative difference in intensity range. The spatial and range weighting functions are typically Gaussian in the...
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