Applied Mechanics and Materials Vols. 644-650

Abstract: This paper analyzes the effects of some parameters of meshless local Petrov-Galerkin method for fully developed magnetohydrodynamic flow in rectanular duct on error of numerical simulation. These parameters includes: the size of local quadrature domain , the number of local domain in local quadrature domain, and the size of support domain. By a series of numerical simulations, the optimal values for these parameters which may cause a good accuracy of computation are determined.

Abstract: BP neural network has parallel processing capabilities and a good approximation of the nonlinear mapping and gradually been widely used in the forecast. Because it is difficult to determine the BP neural network structural model, this paper presents the design ideas from six aspects. Combined with the practical example-mushroom classification, this paper presents the affect of the hidden layer, learning rate, training function on BP network and has some practical significance.

Abstract: In the view of the current support process of spare parts is not comprehensive enough, all aspects without linking with each other, the resources without being shared, spare parts with slow turnaround and high inventory levels, which results in low economic efficiency. Therefore, considering the modern information technology and network technology, the document research on the spare parts support process optimization, which is to make the process more scientific and reasonable, support resources more economical, and respond more sensitive, thereby increasing military and economic benefit of the spare parts support. By means of analyzing three major elements of the spare parts support process modeling including perception task, spare parts resources, business processes, and analysis of several major process modeling method, the document raise the modeling method of petri nets for the task-oriented spare parts support process.

Abstract: Automatic data acquisition and analysis system is set up aiming at measuring and analyzing the electron beams distribution from electron gun and traveling wave tube. It can obtain electron beam parameters, such as three-dimension current density distribution, beam center, beam waist and total current etc. and it can be applied to space technology ranging from centimeter wave to millimeter wave. LabVIEW program is used to acquire data from the hardware equipment and deduce results from post-processing system. As a result, this study is significant to improve the design of electron gun and traveling wave tube in space application.

Abstract: Existing Internet congestion control algorithms did not consider any faults. This paper presents a state feedback fault-tolerant congestion control algorithm which is based on adaptive and robust H_∞ approaches. Simulation result shows that the proposed algorithm has good performance.

Abstract: We focus on produce network models by constructive operations based on configurations in order to provide various network models for The Internet of Things (IoT) such that these models may be economic and strong in building real networks of IoT.

Abstract: The reactive power optimization is formulated based on genetic algorithms in distribution net work. SGA has defects of slow convergence and being prone to immature convergence. In order to eliminate the defects, an improved GA is proposed in this thesis. CIP scheme is presented, which can guarantee diversity of the population by designing the initial population to obtain all the values within the definition area. A parameter called individual distributing degree is defined to describe how individuals are distributed in the definition area. Adaptive mutation rate is defined as an exponential function of the retained generations of the Elitism, and it is in inverse proportion to individual distribution degree. It accelerates the convergent process.

Abstract: This paper studied three traffic rules under the situation of highway straight using the idea of cellular automata, and established the cellular automaton model of two-lane highway (situation of highway straight) for running but not allowing overtaking, the cellular automaton model of two-lane highway (situation of highway straight) for running on the right side and overtaking from the left side, and cellular automaton model of two-lane highway (situation of highway straight) for running on both sides and freely overtaking. This paper defines the concepts such as congestion probability, free passage probability, vehicles entering the highway probability, etc, in which, the congestion density is used to characterize the security of road traffic (the greater the congestion probability is, the less safety); free passage probability is used to evaluate the highway traffic capacity (the greater is the free passage probability, the better is the highway traffic capacity). Based on the simulation results, we can know about the two-lane freely overtaking rules have some effect in improving highway safety and traffic capacity.

Abstract: This paper proposed a coordinate positioning method of 5-wire resistive touch screen. The 5-wire resistive touch screen applying a constant current from the four corners of the lower conductive layer, and all current flowing out from upper conductive layer. When positioning touch coordinates, first set initial preset point. Then measure the actual diagonal voltage of the touch point. Use the opposition searching method to calculate the theoretical diagonal voltage about preset and searching point. Take the theoretical minimum error diagonal voltage point as the new preset point and then searching repeatedly so that the touch point can be approached finally. The method solves the problem about nonlinear equations solution and distortion correction of the 5-wire resistive touch screen without the compensation electrode. It can narrow the frame of the 5-wire resistive touch screen and broaden its applications in a small screen.

Abstract: The remote control system platform and the main function modules are studied and analyzed based on Android operating system. The problem of image transmission of remote control on Android equipment is solved by means of the analysis and comparison of several methods of screenshots and image compression, such as ImageIO compression and JPEGEncoder compression. Finally, we got the conclusion that the transmission efficiency can be increased by the screenshots with robot class and JPEGEncoder compression.