Applied Mechanics and Materials Vols. 556-562

Abstract: In view of the shortages time lag existing in traditional digital low-pass filter in Active Power Filter (Active Power Filter, APF), this paper proposes to adopt slipped-window integrator to realize low-pass filter in harmonic current detection.The current tracking control uses Space Vector Pulse Width Modulation method. Meanwhile, the repetitive predictor is applied so as to improve the real-time performance of the compensation current tracking control. Built a three-phase shunt active power filter simulation model in Matlab/Simulink environment and take experiment under the low pressure condition. The results show that slipped-window integrator and deadbeat current mothod can acquire good dynamic response performance as well as high precision.

Abstract: Manifold learning has made many successful applications in the fields of dimensionality reduction and pattern recognition. However, when it is used for supervised classification, the result is still unsatisfactory. To address this challenge, a novel supervised approach, namely macro manifold learning (MML) is proposed. Based on the proposed approach, the low-dimensional embeddings of the testing samples is more favorable for classification tasks. Experimental results demonstrate the feasibility and effectiveness of our proposed approach.

Abstract: We research on 44 ancient ceramics made in Jingdezhen through previous dynasties about its classification problem by K-means Cluster and K-medoids Cluster. We got on classification results and analysed the classification effectiveness of different classification methods. The study has the reference value about the identification of the ancient ceramics.

Abstract: Four two-ordered basis matrices were introduced to deduct Stokes parameter representing electromagnetic wave polarization. Two of them have algebra features similar to unity and imaginary of complex number, so an exponential function was defined which can easily express some matrix operation such as coordination rotation in 2-dimension. The other 2 basis matrices were also incorporated to deduce the Stokes parameters. The four matrices have some fatigue algebra structure which was incorporated in deduction. The coordinate transformation was converted to some matrix problems and we get a more concise result.

Abstract: The paper introduces the way of solid modeling and wire frame modeling, described modeling ways from drawing the general outline of the form, to using the general model to make out the general modeling of form, to making the whole effect of the animation by combining with concrete examples which are pf rapid and convenient application value in promoting design speed, enriching expression effect (surface modeling), optimizing design process. It is beneficial to play the design wisdom, give consideration to both economic and social benefits. Its modeling is easy to meet consumer demand for fresh and exaggerated things, and helps to clear the market demand, good commodity modeling and its industrialization prospect.

Abstract: According to the characteristics of marine operation, this article designs a simulation method of marine operation resources scheduling, and improves multi-dimensional dynamic list scheduling algorithm to make it applicable to the marine resources scheduling of unit level. Simulation results are obtained through a simulation based on an anti-submarine mission. Finally analysis on the existing problem of the simulation framework combined with the actual situation is enumerated, and further study direction is put forward.

Abstract: Differential evolution algorithm’s performance often depends heavily on the parameter settings. Based on analyzing the influence of the parameters setting in the experiment, the effects and the optimal selection of those major parameters on DE are analyzed, and some conclusions are derived. A new differential evolution algorithm which the scale constant (F) and crossover constant (CR) are generated as random numbers within a certain range in each iteration process is proposed. The experimental results shows that the new algorithm is simple, easy to realize and can get higher precision and better stability.

Abstract: A new target assignment strategy is presented for cooperative interception in a multi-interceptor against multi-target engagement. The target assignment strategy is inspired by hybrid model predictive control. The performance index of target assignment is composed of the prediction of zero-effect-miss (ZEM) and logical variables, which are given in this paper respectively. The strategy is then derived via one-step predictive control. Finally, numerical simulations with different interception conditions are carried out, the results verify the effectiveness of the proposed method.

Abstract: A kind of hybrid parallel compensation scheme combining active compensation and passive compensation technology was proposed in this paper. The regulating function of reactive power can be realized dynamically and smoothly by means of integrating Static Var Generator (SVG) with passive filter (PPF) and then paralleling with the system load side bus. The harmonic current and voltage in the system could be filtered out. The calculation method of total compensation capacity, the determination method of SVG compensation capacity and the design method of PPF filter branches has been presented. Simulation result has proved that this scheme can achieve reactive power compensation and complete harmonic governance at the same time. Besides, the problems of reactive power and harmonic in the power system can be solved effectively, and the good engineering practical value is obvious. Figure 1 Hybrid parallel compensation structure diagram of SVG and PPF

Abstract: Establishing 3d model is basis for visual simulation, it has a great effect on real-time and authenticity in process of rendering and taking on Vega visual simulation platform. Therefore, reasonably optimizing model is very important for solving the contradiction between real-time and authenticity and realizing effects of establishing authentic and fast establishing in visual simulation. This paper will analyze how to use modeling optimization techniques to optimize armored vehicle model based on Creator, so as to make it better to meet immersive and interactive requirements in visual simulation for human, vehicle and driving environment, and perfectly present real-time and authenticity effect for armored vehicle in visual simulation.