Applied Mechanics and Materials Vols. 536-537

Abstract: Based on PN junction population, flow model is set up to consider the amount of land to simulate the population migration, and take into account the level of economic development, the factors combine and incorporated into the analytical framework of a model derived the probability of a combination of multiple factors under conditions of population migration. The results of this simulation model can effectively explain the process of urbanization of the population flow problems, is an innovative model generality, there is some reference in the theoretical study.

Abstract: In this paper, we give the definitions of approximately derivates, and then define the ap-Denjoy integral of fuzzy valued functions using fuzzy approximate Lusin function and investigate some properties of ap-Denjoy integral.

Abstract: Some new impulsive integral inequalities related to certain integral inequalities are established, which extend the results proved by J. Li in [On some new impulsive integral inequalities, Journal of Inequalities and Applications, Vol. 200. The inequalities given here can be used as basic tools in the qualitative theory of certain impulsive differential and integral equations.

Abstract: This paper present a typical respiratory movement method simulated by LabVIEW and Simulink.Because calling Matlab in LabVIEW can control hardware easily and realize complex algorithm concurrently,so we combine the capabilities of Simulink and Real-Time Workshop with LabVIEW,and use Simulation Interface Toolkit importing simulation models into LabVIEW.This paper provides a through introduction for respiratory modelling and control design,the combined method that can integrate the advantage of the two method is illustrated for control aim.

Abstract: The medium with gradient change of acoustic impedance is a new acoustic structure which developed from multiple layer structures. In this paper, the inclusion is introduced and a new set of equations is developed. It can obtain better acoustic properties based on the medium with gradient change of acoustic impedance. Theoretical formulation has been systematically addressed which demonstrates how the idea of utilizing this method. The sound reflection and absorption coefficients were obtained. At last, the validity and the correctness of this method are assessed by simulations. The results show that appropriate design of parameters of the medium can improve underwater acoustic properties.

Abstract: The high-performance parallel computing (HPPC) has a better overall performance and higher productivity, for a generical large-scale army equipment system of systems (AESoS) simulation, and the runtime efficiency can be multiplied several tenfold to several hundredfold. The requirement analysis of simulation framework of AESoS based on HPPC was proposed. After the simulation framework of AESoS based on HPPC and its key techniques were discussed, the simulation framework of AESoS Based HPPC was designed. it is of great significance to offer certain references for the engineering application in the simulation fields of AESoS based on HPPC.

Abstract: To improve the precision and real-time of the virtual liver surgery simulation system with haptic feedback, a novel deformation modelling based on wave equation and spherical harmonic is proposed. Continuous changed liver models were mapped into a common reference system in which corresponding coefficients of spherical harmonic were compared with method of principal components analysis and force feedback were calculated by simplified deformation wave equation. Moreover, system structure design, fast collision detection and real-time feedback operation are also discussed in detail. Experimental platform of virtual liver surgery was established based on vizard 4.0 and Sensable-phantom® desktopTM. Experiment results show that the system can provide a stable force to the human operator and which satisfy the requirement of real-time performance. Establishing a simple and lifelike physics deformation model and a precise and rapid collision detection algorithm favors the performance improvement of the virtual liver surgery simulation system.

Abstract: Let n be a positive integer and k≥2, b_k(n) denotes the k-th power complement fuction, we define a new set A.This paper is mainly to study the mean value properties of the Euler function in set A,and give an interesting asymptotic formula.

Abstract: In this paper, Von Karman random media is constructed with power spectrum method. The random media with Von Karman autocorrelation cannot be constructed in time domain but in frequency domain. So power spectrum method is utilized to solve the problem. The spectrum of random function is generated in frequency domain with random field and auto-correlation function. With inverse Fourier transformation, the Von Karman random media model is constructed. With different correlation lengths, six group of Von Karman random media are constructed.

Abstract: This paper proposes a new approach to the multi-robot map fusion algorithm that enables a team of robots to build a joint map without initial knowledge of their relative pose. First, the relative distance and bearing measurements between two robots are fused together by the covariance intersection method after they detect each other. Second, the transformation equations among multi robots coordinates are derived based on their relative distance and bearing measurements. Third, all the multi robots local maps are merged into one global map by unscented transform based on the transformation equations. Fourth, the possible duplicate features are filtered out by the robots maximal detection area and the features coordinate range, then the Mahalanobis distance is computed to decide the duplicate features correspondence through unscented transform, and the Kalman Filter is used while fusing the duplicate features information. As a means of validation for the proposed method, experimental results obtained from the two robots are presented.