Advanced Materials Research Vols. 989-994

Abstract: We study the strong stability of linear forms of pairwise negatively quadrant dependent (NQD) identically distributed random variables sequence under some suitable conditions. To overcome the weakness of collaborative services ability in different grid portal, a new grid portal architecture based on CSGPA (Collaborative Services Grid Portal Architecture), is proposed. This paper aims to enhance the performance of PSO in complex optimization problems and proposes an improved PSO variant by incorporating a novel mutation operator. The results obtained extend and improve the corresponding theorem for independent identically distributed random variables sequence.

Abstract: HF channel sounding requires perfect autocorrelation property of the sounding sequences. Compared with other pseudonoise sounding sequences, Zadoff-Chu sequence gets great attention due to its predominant periodic autocorrelation property. A Wireless-Optical Broadband Access Network (WOBAN) is gaining more attention because its good performance and merits such as reliability, robustness and high capacity as well as flexibility. There are many factors that can affect the network performance, such as delay, packet loss and capacity utilization. Application examples show that, this system can significantly improve the efficiency of aerodynamic design.

Abstract: In order to make full use of texture features of image when fusing images, and taking into account the inherent advantages of fractal theory in this respect, a novel image fusion algorithm, which used fractal dimension and directional contrast, based on multi-wavelet transform was proposed in this paper. So, we put forward a new design of the intelligent lock which is mainly based on the technology of wireless sensor network. Particle swarm optimization (PSO) is a recently proposed intelligent algorithm which is motivated by swarm intelligence. PSO has been shown to perform well on many benchmark and real-world optimization problems; it easily falls into local optima when solving complex multimodal problems. Moreover, the objective indexes, which are image entropy, standard deviation and quality measure, were adopted to evaluate the comparative results of evaluating fusion quality. To avoid the local optimization, the algorithm renews population and enhances the diversity of population by using density calculation of immune theory and adjusting new chaos sequence.

Abstract: This paper presented the key techniques development of motor/generator (M/G) for the FES system in recent years, and summarized the latest developments of three machines such as: induction machine (IM), reluctance machine (RM) and permanent magnet machine (PMM) including traditional structure PMM and Halbach structure PMM, which now widely used in the FES system. The characteristics of three machines had been compared and analyzed, which provides guidance for the FES field researchers to choose appropriate M/G.Then the comparison of spectra of the sequences respectively interpolated by FDIA and commonly used interpolation algorithm is conducted, which affirms the superiority of FDIA. Finally, an effective method of achieving best decimation of the sequence interpolated by FDIA is provided. All these lay primary theory foundation for the application of Zadoff-Chu sequence to HF channel sounding.

Abstract: The multi-objectives of procurement scheme evaluation and the complicated nonlinear are pointed out in this paper according to the definition and characteristics of large complex equipments, and with regard to the defects present in the existing multi-objective comprehensive evaluation method, the assessment method of using fractal correlation dimension as the comprehensive quantitative index of multi-objective decision making in the large complex equipment procurement scheme is put forward, and the efficiency of such method is verified by the example of combat aircraft, which provides a new idea for the multiple objective decision making in the large complex equipment procurement scheme.

Abstract: In this paper, the traffic detection system based on ground sense coil is studied. Due to the change of ground sense coil inductance, the output waveform frequence of LC oscillation circuit changes [1]. The LC oscillation circuit is composed by the three point detection circuit. Then the wave is shaped into a square-wave by shaping circuit. The square-wave is transmitted into MCU, the frequency change is detected by MCU and motor is controlled by control signal from the MCU.So when a vehicle passes above the ground sense coil, this approach makes automobile blockader lift the stop lever automatically. And the system can stop the lever falling when there is a vehicle below the lever, so this system can prevent the vehicle damage. This system can improve practical value and application prospect of a automobile blockader.

Abstract: In many techneques for handling discontinuities, the presence of a discontinuity is detected by a change of sign in the value of a discontinuity function. This paper discusses the problems caused by this sign rule of detecting discontinuities for some engineering applications, and describes an alternative which uses a change of the state marker value .The modified program with Runge-Kutta-Merson and Gear integration subroutines have been successfully applied to the simulation for mechanical, electrical and other dynamic systems with discontinuities for which the original program is inefficient.

Abstract: In view of the characteristic of goods return in electronic commerce which some returned goods can be redistributed directly to customers after handling simply, a responsive closed-loop supply chain logistics network with integrating forward and reverse flow is researched. The returning feature of online commodity and economy of scale of return goods at initial collection point are based, and the optimization design model of closed-loop supply chain network aiming at determining the number and location of hybrid centers and initial collection points is presented, and a hybrid genetic algorithm is devised to solve the closed-loop supply chain logistics network problem. The usefulness of the proposed model and algorithm is validated by its application to an illustrative example.

Abstract: Public transit crew scheduling problem is to carry out the operations task with the minimum drivers and operational cost. It is a multi-objective programming problem, which is well-known to be NP-hard. Restrained by the operational constraints and labor agreement, all the feasible sets of shifts were pre-generated in this paper. This work established a penalty function to ensure the validity of the schedule, and a cost function to reduce costs. With the help of Tabu Search, a solution can be found easily. A computational experiment based on the real-world crew scheduling problem in China demonstrates the strength of this method.

Abstract: Harmony search algorithm is a new meta-heuristic optimization method imitating the music improvisation process where musicians improvise their instruments’ pitches searching for a perfect state of harmony. To enable the harmony search algorithm to transcend its limited capability of local optimum, a modified harmony search algorithm is proposed in this paper. In the modified harmony search algorithm, the mutation operation of differential evolution algorithm is introduced into MHS algorithm, which improves its convergence. Several standard benchmark optimization functions are to be test and compare the performance of the MHS. The results revealed the superiority of the proposed method to the HS and recently developed variants.