Applied Mechanics and Materials Vols. 556-562

Abstract: The wave run-up formulas from the Code of Hydrology for Sea Harbour (CHSH), the Code for design of levee project (CDLP) and Hunt are all widely used, but they are in different forms of mathematical equations. In this paper, some flume experiments for wave run-up are made to examine these formulas. The tests show that the wave run-up formula from Hunt is in good agreement with the experiments. The wave run-up formula from CDLP has been usually used in steep slopes, while the tests show that it is also in good agreement with the experiments in the small slope flume. The wave run-up formula from CHSH is also used mainly in steep slopes, it brings significant error of the wave run-up calculation contrasting with the experiments.

Abstract: A mathematical model for the growth of gallium nitride in a vertical impinging metalorganic chemical vapor deposition (MOCVD) reactor is developed. The dependence of the GaN film and the uniformity of the deposited layers on the inlet velocity is investigated to gain greater insight into the reactor performance and characteristics. Based on the simulation results, discussion is presented in this paper to offer the possibility of better control of the GaN film growth process and to ultimately lead to an optimization of the process.

Abstract: This paper researches the problem of minimization of delay under the multicast end-to-end delay bounded and presents a new multicast routing algorithm. This algorithm using anew strategy based on Optimized_Floyd algorithm modifies the paths from the source node to the destinations, the nodes whose delay are smaller than the average achieves a new delay as big as possible and the nodes whose delay are above the average achieves a new delay as small as possible. So it also offers a good balance between tree cost and delay. Simulation results show that the algorithm has low cost, less time complexity and good comprehensive performance, can be used in actual network environment.

Abstract: Belt conveyor system for bulk material in large plants usually needs amounts of transfer station, which are one of most important dust generation areas. The dust generation mechanism of transfer station is that bulk material dropping down from high site causes air flow and small particle material move with air. The skirtboard of transfer station can restrain dust to some extent through airproofing its flow. Gas-solid flow in transfer station is simulated with Computational Fluid Dynamics (CFD) method in this paper. Based on the simulation results of traditional rectangular skirtboard, an optimized skirtboard is proposed. Contrast of two plans’ simulation results indicates that the new one can restrain dust obviously, which is significant for material saving and environment protecting.

Abstract: Higher mathematics and Probability and statistics are the core course in university,There is a close relation between the two. By comparison and analysis of the scores of the two courses, this paper attempts to show that higher math scores on the impact of Probability and statistics, Higher mathematics X is in linear relationship with Probability and statistics Y,The coefficients for the two is r=0.541. the correlativity between higher mathematics and Probability and statistics has been investigated by regression analysis,the regression equation between the two is obtained,therefore the quantitative analysis can be carried out.Conclusion: There is a good linear correlation between higher mathematics scores and Probability and statistics scores.Description the quality of higher mathematics achievements on the impact of Probability and statistics can not be ignored, for the construction of Higher mathematics courses provide a strong basis.

Abstract: Security is the main direction of ammunition for future development. Depending on the security level that ammunition relative to its life process may suffer major environmental stimuli factors, raising ammunition’s safety criterion, introducing safety parameters, establishing a theoretical model of ammunition safety performance evaluation. In the model, based on the value of the safety of ammunition, we divides the security level of ammunition. Based on this evaluation model to calculate the conventional bomb safety performance of the changing Mk-82’s insensitivity. We analyzed the influence of unexploded ordnance (UXO) on the overall safety performance of ammunition from the failure of the design. The results show that the end of unexploded failure design can significantly improve the safety level of ammunition. This model better reflects the inherent safety performance of ammunition, can provide theoretical guidance for the safety design of ammunition and safety performance evaluation.

Abstract: Airport gate assignment is to appoint a gate for the arrival or leave flight and to ensure that the flight is on schedule. Assigning the airport gate with high efficiency is a key task among the airport ground busywork. As the core of airport operation, aircraft gate assignment is known as a kind of complicated combinatorial optimization problem. In this paper, we consider the over-constrained Airport Gate Assignment Problem where the number of flights exceeds the number of gates available, and where the objective is to minimize the overall variance of slack time (OVST). According to the intrinsic characteristics of the objective function itself, we design a meta-heuristic method and simulated annealing to solve the problem. Finally, the illustrative examples show the validity of the proposed approach.

Abstract: In this paper, particle swarm optimization (PSO) algorithm is presented to optimize the five-effect evaporator system in a cane sugar production plants and realize the minimum loss of energy.Generally, the energy optimization of five-effect evaporator system is a so complex that can not be found a effective algrithm to resolve. The energy optimization of five-effect evaporator system requires considering various parameter criteria so as to meet the requirements of the production process. Hence, a energy optimization model of five-effect evaporator system is proposed. We tested the presented model and PSO algorithm at a cane sugar production plant in Guangxi province so as to support the application of industry.The results of the empirical study show that the energy optimization of five-effect evaporation in cane sugar production plants based on a PSO algorithm is feasible and effective.

Abstract: In precision machining field,lighting quality has an important influence on subjective visual experience and job performance. Therefore,it has great significance that the effective assessment of illumination uniformity.In connection with illumination uniformity assessment which is a nonlinear optimization problem, a evaluation method of illuminance uniformity based on improved particle swarm optimization algorithm is proposed.under the premise of elaborate the basic principles of the algorithm and implementation steps. The paper has given its optimized objective function and fitness function of the algorithm.what’s more, the feasibility and accuracy of the algorithm is verified.The results that illumination uniformity function of the simulation show that this method not only improves the calculation accuracy and reduces the possibility of local convergence.

Abstract: In most of the existing sealing machine of tube, the sealing efficiency is universally low, this paper apply concentrated forcing scheme to the movable sealing plate, and create a new model of sealing of the tube, using the professional analysis software Inventor to carry out stress analysis for the movable sealing plate, the results show, in concentrated forcing scheme, the movable sealing plate can satisfy the force demand, and the space of the movable sealing plate can be greatly used, multiple tubes can be sealed at the same, the sealing efficiency of tube is greatly improved.