Applied Mechanics and Materials Vols. 246-247

Abstract: We have studied the mechanism of interaction of shock waves with dust bulk, and built the model of stripping of boundary layer of dust entrained by shock waves, and calculated out the maximum uprising velocity of dust particle, and built the equation of dust outline with the equation of relaxation movement of a dust particle behind shock waves. The result is identical with that of experiments.

Abstract: The Internet has changed the enterprise management mode too extremely. In China's automobile industry development, the traditional supply chain management (SCM) requirement can't adapt to the new situation of e-commerce. E-commerce supply chain management solutions based on the Internet automobile sales have been widely used in automotive industry. In this paper, firstly compares the difference between traditional supply chain management and traffic. Then provide information flow control solutions Automobile sales industries. In addition, puts forward an integrated management system in automotive industry order planning sales were introduced in detail.

Abstract: In order to deal with nonlinear, time-varying and disturbance-involved characteristics in the practical industrial processes, an indirect adaptive state-space MPC (model predictive control) method based on subspace identification is proposed. The state-space model, obtained through the POMOESP (Past Output MOESP, MOESP is one form of the subspace identification methods) algorithm, is regarded as the system model. Then, this model is used to design the model predictive controller that involves the solution of a quadratic programming problem to constraints. This controller is applied to the process control simulation on a 2-CSTR. Through comparisons of performance with a linear state-space MPC scheme, the superiority of the proposed control method is illustrated.

Abstract: As an important part of the knowledge management activities, knowledge transfer is effective way that the cluster enterprises to gain, learn and accumulate their own knowledge. In this study, we analyzed the mechanism of the knowledge potential difference between enterprises in the industrial cluster on knowledge transfer. Through establishing a cellular automata model, the paper simulated the process of knowledge potential difference effect on the knowledge transfer between enterprises within the industrial cluster. The simulation results indicate that the knowledge distance has remarkable impact on the knowledge transfer between cluster enterprises, and only the proper knowledge distance will be more conducive to the knowledge transfer between cluster enterprises.

Abstract: The key technology of visual simulation, of automobile engine is introduced in this paper. The mathematical model of crank connecting rod, and then-the mathematical model of the valve train get the results data Adams in dynamics simulation. The scene is driving. And the user interactions between the virtual environment is based on the prime minister and only once. Realization and system connecting rod crank-also in connection of valve and train. It has well real-time and soaked, and will bring reference value to the research of visual simulation system several similar mechanical transmission.

Abstract: The mathematical model based on temperature formulation for describing freezing course of soil is presented and the explicit finite difference method is used to perform computer simulation of freezing time of soil in this paper. It seems to be satisfactory by comparing the numerical results by the method of TDMA with experimental data. It is significant for freezing process and freezing units, optimum design of practical engineering.

Abstract: To solve the task allocation of multi-robot systems, a novel explosive evolution - based immune genetic algorithm (EIGA) is presented. On the basis of the immune genetic algorithm (IGA), the population number of EIGA is increased quickly through explosive evolutionary mode, and then the better individuals are selected through the comparison of allelic genes, which can improve the population quality with the premise of ensuring the population diversity, and enhance the search speed and search precision of EIGA. Compared with the IGA and genetic algorithm (GA), the simulation results indicate that the proposed EIGA is characterized by quick convergence speed, high optimization precision and good stability, and the tasks are allocated rationally and scientifi-cally which realizes the task cooperation of multi-robot systems well.

Abstract: Dynamic characteristics of flow field on the ship deck are complex. CFD(Computational Fluid Dynamics) results of LHA ship were verified the accuracy of numerical simulation through compared with the experimental data. Three different grids were generated to discuss and analyze the influence of the prismatic layer grid. The results show that, the presence of prismatic layer grid does not affect the results. With calculating the full-size aircraft carrier ship, the mechanical evolution of vortices in the ship deck airwake field was found. The results can provide an important reference for engineering calculation of the fluid dynamics and establish best design method early in a ship's planning stage.

Abstract: In order to improve design efficiency and reduce design cost, a new method combining numerical simulation with experimental verification was proposed in this study. Firstly, controllable process parameters such as continuous casting speed and cooling water flow rate, are robustly designed according to the numerical simulation results of flow field, process experiments were subsequently done on a newly developed continuous casting machine of lead slice, then the robust optimal design for the continuous casting process were gained. The results show that the cooling water flow significantly affects axial thickness of the lead slice, while the casting speed determines mainly its circumferential thickness. When the casting speed is between 280L/min and 320L/min, and the cooling water flow rate is between 950r/min and 1100r/min at the same time, the axial thickness and circumferential thickness can been kept respectively in1.0±0.03mm and 1.0±0.1mm, which meet the robust design requirements.

Abstract: Development of an appropriate propagation channel model is an important step to design wireless body area network (WBAN). Because the human body has different body shapes (male, female and child), different tissues with different permittivity and conductivity (even the same person at the different age), and limbs positions and postures are changing all the time, this made the in-body channel modelling extremely difficult, if not impossible. There are few publications on implant communication channel models compared to wearable WBAN. In this paper, we present a literature survey on radio channel modelling for WBAN, especially the IEEE 802.15.6 models. The performance of the model is studied by simulating probability density functions (PDF) and cumulative distribution functions (CDF). Finally, we briefly outline some aspects of our future research works.