Shijie Dai

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A rough set genetic algorithm (RSGA) is mainly studied to optimize the robot path planning speed and enhance the precision. At first, under the grid model and by the feasibility of the grid, the initial decision-making table of the robot is obtained, which can be simplified by the rough set theory to extract the minimal decision-making rules. We use these(More)
In order to solve the problem about the recognition accuracy, Tchebichef moment invariants and support vector machine (SVM) are adopted to recognize the vehicle-logo. It extracts six invariant moments of the object as feature vectors, and then uses the support vector machines (SVM) to recognize vehicle-logo. Tchebichef moment invariants perform(More)
To solve the seam tracking problem of the welding mobile robot, a new controller based on the dynamics model of the mobile welding robot is designed. Self-turning fuzzy controller is designed to complete coordinately controlling of cross-slider and wheels, and exactly welding seam tracking was realized by use of the controller. To make the tracking more(More)
With the rapid development of economic globalization, the method of material identification in customs is behind the times. The higher identification efficiency is required by the increase of imports. In this paper, a new hyperspectral imaging intelligent material identifying system based on instantly scanning technique is proposed. The system is(More)
This paper discusses how to construct a B-spline surface from its boundary information and inner points. First, an algorithm is presented which can construct a B-spline surface that interpolates four given boundary curves and simultaneously approximates given inner points. Then, the approach is extended to interpolate the cross-boundary derivatives as well.(More)
Thermally induced errors have been significant factors affecting machine tool accuracy. It is very significant to study how to accurately simulate the spindle thermal errors. In this paper a novel concept of thermal error modes analysis is proposed to develop a better understanding of the thermal deformation on a machine tool. The basic thermal error modes(More)
A control strategy that combines input shaping with PD feedback control is presented in this paper. Input shaping was used to cancel the swing of the bucket, and feedback was used to detect and eliminate the position error of the trolley. Simulation of the bucket dynamics was carried on to evaluate the performance of the controller.
A carboxymethylated polysaccharide (CMSERP) was prepared from the residue of Sarcandra glabra (Thunb.) Nakai. CMSERP was mainly composed of galacturonic acid (GalA), glucose (Glc), galactose (Gal), glucuronic acid (GlcA), arabinose (Ara), rhamnose (Rha), xylose (Xyl), ribose (Rib), and fucose (Fuc) at the ratio of(More)