Advanced Materials Research Vols. 798-799

Abstract: An AC electric dynamometer load-based fuel cell hybrid vehicles integrated test bench was developed with program automatically control and driving two modes. Real-time data was acquired through data acquisition card. Vehicle control and energy management were implemented by IPC.It can be used for fuel cells, lithium battery sets, motors, hybrid power allocation and management performance test. Test results that driven by Lithium iron phosphate battery sets alone in driving mode and driven by fuel cell and Lithium iron phosphate battery sets in the program automatically control mode were given and discussed.

Abstract: in order to analyze the guide beam output displacement of the right-angle flexure hinge symmetrical four-bar mechanism, a half beam model was established based on the special structural characteristics and deformation characteristics. The formula of guiding displace were derived using approximate beam deflection curve equation. The finite element analysis of the model was carried out by ANSYS, it analyzed the cause of the theoretical value and simulation value for different reasons.

Abstract: The crew emergency evacuation security system is a life-saving device, the ultimate function of which is to save the life of the aircraft crew in a new regional airliner at high altitude. The system is used to push the service door with translational motion for a suitable distance. Before the system was started, the force state of the service door was got with the fluid mechanics knowledge. When the system was started, after a period of pressure relief time, the aircraft cabin pressure was calculated with the Bernoulli's Equation. The movement trajectory and the force state of the service door were obtained by the computational fluid dynamics theory and numerical simulation method. All of the above work must lay a theoretical foundation for the development of the crew emergency evacuation security system, and ensure the flight safety.

Abstract: In this study, the single mineral flotation experiments of magnesite and its associated minerals including dolomite, serpentine, talc and quartz were conducted, and the influences of the dosage of collectors such as sodium oleate and lauryl amine, pH value and the influences of regulars such as sodium hexametaphosphate and sodium silicate on those minerals were researched. According to the results, a process to reduce the content of gangue minerals was proposed, which at first use lauryl amine as a collector to remove most talc and quartz and part of the dolomite and serpentine, and then use sodium oleate as a collector to separate magnesite from dolomite and serpentine. This is a theoretical reference for the beneficiation of magnesite.

Abstract: Brittleness source identification is the work of finding every brittle source. The key of analysis of the brittleness of system is to build the brittle model. The chart theory can describe the direction and weigh of the brittle spread model. In this paper, bring forward the method and step of building the brittle model based on the chart theory, build a model of 7 nodes electric power system and analyze it and then obtain the hierarchy electric power system brittle model and the brittle source, and at last verify this method is valid to network system.

Abstract: This paper first mapped out a processing scheme of handle shell injection mould cavity, then carried out the manufacturing simulation of the cavity by making use of NX CAM, furthermore, it made an analysis to the phenomenon of the residuary materials left at the corner area when milling cavity in a high-speed. At last, the thesis proposed the best tool path optimizing strategy.

Abstract: The finite element model of an aircraft hydraulic pipe was established in this paper. Based on LS-Dyna software equivalent static pressure and peak pressure surface loads on the tire burst test (main landing gear retracted state, and did not consider the impact of tire debris) jets were applied to the hydraulic pipe. Both stress and strain contours of hydraulic pipe were obtained under dynamic loading. Plastic strain occurred under both loads on the hydraulic pipe, and the peak pulse loads were more severe than equivalent static loads, the maximum strain reached 0.41172 under the peak pulse loads. However, in both cases the pipe is not broken.

Abstract: The flexible job-shop scheduling algorithm with the high computational complexity is important in both fields of production management and combinatorial optimization. We developed an improved genetic approach for the flexible job-shop scheduling problem (FJSP), since it is quite difficult to achieve an optimal solution to this problem within reasonable computation time. A chromosome representation combines both routing and sequencing information is represented with genetic algorithms (GAs) commonly optimize the problem by minimizing an objective, makespan. Our algorithm selects the chromosome according to different objectives, and crossover each other to maintain the species diversity. New crossover and the mutation operators utilize the critical path with certain probability to modify assignment and sequence for preventing being trapped in a local optimum. The results obtained from the computational study have shown that the proposed algorithm is an effective approach for the FJSP.

Abstract: A light mobile GIS framework is proposed which is based on J2ME and mobile scalable vector graphics (SVG), GIS is an important component in digital oilfield. First, it defines a general mobile GIS framework. Second, all kinds of GIS code rules are defined, how to manage map layer in SVG is defined, all kinds of GISs object can be described in SVG and DOM of XML. And finally, in distributed environment, based on SVG, JAVAME and related technologies, a light mobile GIS platform is implemented. In this case, the light mobile GIS platform can be used to not only transmit production data, but also locate the interested objects, and the platform is applied to the Daqing oil field.

Abstract: Brittleness source identification is the work of finding every brittle source. At first, build model of electric power system, based on direct current tide, all branch currents can be solved quickly. Break off every branch in turn. Use distributing factor method to obtain the other branch currents by breaking a branch current. If the other branch current exceeds the 20% rating current, then it breaks. This will lead to the refresh distribution, until all branch breaks, namely the brittleness being motivated, or until the other branch currents all satisfy the restriction condition. Thus all branches which lead brittleness to be motivated is the brittle source of electric power system. Through analyzing a three generatrixs system, obtain that (2),(3) and (4) is the brittle source.