Advanced Materials Research Vols. 805-806

Abstract: Based on the 16V265H high power diesel engine as the research object, used GT-Fuel and GT-Power to build the simulation model and study solenoid valve parameters such as spring pre-tightening force, moving parts mass and spring stiffness to the influence on engine combustion performance. Through calculation and analysis, we got a set of reasonable solenoid valve parameters. The experiment proved that the simulation model can well simulate the actual operation of diesel engine and the solenoid valve parameters are feasible.

Abstract: With medical image three-dimensional reconstruction software reconstruct three-dimensional model of the pelvic, Not only the principle of aiming device design is introduced, but also deduces the relationship between the measurements of pre-operative pictures and the angles of drilling ringers of the aiming device, and also compiles applied software for numeration, By the virtual prototype on aiming device of setting screws in acetabulum anterior column, the doctors can simulate the operative environment before operation, The study provides a dependable approach to advance the accuracy rate during operation of acetabulum anterior column setting screws deeply.

Abstract: Based on the existing LED (light emitting diode) chip waxing machine running in single-station serial mode, a multi-station LED chip waxing machine was designed which made creative improvements on the revolving platform of the waxing machine. Working efficiency was greatly increased with multi-station continuous parallel working mode. The control system used genetic algorithm-based PID (proportion integration differentiation) control to precisely control the revolving platform and all the manipulators, so that the waxing machine would carry out the fully automated assembly line work.

Abstract: On type 380 diesel engine, orthogonal experimental studying on exhaust noise was carried out. This is to study the influence factors and degree on exhaust noise of internal combustion engine, and determine the main and secondary influence factors on diesel exhaust noise and their interaction. A noise prediction equations was established by studying the test samples based on genetic algorithm neural network. The results is very precise by test.

Abstract: The effects of moving wakes on the compressor cascade flow are discussed in this article, which can be regarded as the flow simulation between stages of compressor cascade. The moving wakes are simulated by moving cylinder before a compressor cascade flow. Different flow situations by changing the angle of wakes direction are presented by numerical simulation. The performance of cascade influenced by cylinder wakes can be related to several parameters, such as the distance between cascades in the shaft direction, the angle of wake direction. Loss of the cascade changes along with those parameters whose optimal direction is demonstrated.

Abstract: The performance analyses of adaptive access mechanism have not been studied completely, especially in non-saturation conditions. By using feedback signal of channel, we propose an adaptive access mechanism, which adjusts parameters based on idle slot intervals between two data transmissions. Then, we analyze the network performance of throughput, media access delay and retransmission attempts of packets, which shows some main characteristics of adaptive access mechanism. The simulation results also demonstrate the validity and good scalability of the proposed access mechanism.

Abstract: In this paper,using numerical simulation tools PHOENICS for numerical simulation study is made on furnace gas burning in the hearth, and analyses furnace oil furnace temperature distribution in the flow field characteristics the internal flow field of oil field heating furnace hearth temperature distribution characteristics. On this basis, this paper establisheda mathematical model which can truly describe the chamber internal physical and chemical changes, selected the appropriate numerical simulation methods, plotted the actual temperature profile case, which can reflect the qualitative and quantitative actual situation of work.Finally suggestions are given, which provides the theoretical foundation for the next step and the actual research.

Abstract: This paper proposed a novel diagnosis algorithm based on Hurst exponent and BP neural network to detect carbide anvil fault in synthetic diamond industry. Firstly, a sort of preprocessing algorithm is proposed, which uses the sliding window and energy threshold method to separate the pulse from initial continuous signal. Then, some characteristic parameters which are based on Hurst exponent are extracted from the separated pulse signal. These characteristic parameters are used to construct fault characteristic vectors. Finally, the BP neural network model was established for fault recognition. Experimental results show that the proposed fault detection method has high recognition rate of 96.7%.

Abstract: Scene simulation technique has been widely used on the field of weapon developing. However, the problems such as technique intricacy and the difficulty of cooperating with work prevent it further developing. So the scene simulation approach to the complex system is put forward based on UML. It can be used to manage effectively the relation of scene simulation models with UML, the organization of models, and the maintenance or the modification of the simulation, to implement till the optimized project. Practical application showed that the approach is available for visualization of numerical calculation, simulation model, simulation interaction, maintenance and modification of scene simulation. It can improve actual operation efficiency considerable.

Abstract: Content-based image retrieval, limiting its functionality and semantics. In order to study a new method, this study, with the representative image for more information on user feedback, positive feedback framework proposes two new components called the representative image selection and label propagation. A very large image acquisition experimental result demonstrates the high electiveness positive feedback framework proposal.