Advanced Materials Research Vols. 204-210

Abstract: As the core of routing protocols, route selection algorithm plays the key role in the scenario of quick mutability of the network topology. In mobile ad hoc networks, node mobility has been one of the dominant factors which cause the loss of performance so that the path duration and stability has to be taken into account. On the other hand, energy awareness for computation is becoming another crucial parameter. In this paper, a novel routing selection algorithm has been proposed without any additional device (such as GPS). Path stability based on stability change ratio and energy awareness has been jointly considered in this proposed algorithm. In order to verify the correctness of the proposed solution an enhanced routing protocol based on AODV named EN-AODV has been presented. Simulation results show that the performance of EN-AODV is better than that of traditional AODV and NCR-AODV in terms of normalized routing load, packet delivery ratio and nodes death rate.

Abstract: A novel porous micro heat sink system is presented for thermal management of high power LEDs, which has high heat transport capability. Numerical model for the micro heat sink is developed to describe liquid flow and heat transfer based on the local thermal equilibrium of porous media, and it is solved with SIMPLE algorithm. The numerical results show that the heated surface temperature of porous micro heat sink is low at high heat fluxes and is much less than the bearable temperature level of LED chips. The heat transfer coefficient of heat sink is very high, and increasing the liquid velocity can enhance the average heat transfer coefficient. The overall pressure loss of heat sink system increases with the increasing the inlet velocity, but the overall pressure drop is much less than the pumping pressure provided by micro pump.

Abstract: There are most important features hiding in the higher-order statistics information of the images. They are extracted by classical fast-fixed independent component analysis (FastICA algorithm) which requires a large amount of calculation and it is sensitive on the selection of initial point. To overcome the two shortcomings, an improved FastICA algorithm is proposed and mathematical models are constructed. And they are applied to obtain the basic vectors from the images. Finally, take litchi fruit image in natural environment as an instance and experiment with Matlab software. The results show that there are less computation and stronger stability of the improved FashICA algorithm used to extract image features.

Abstract: In the new trend of informatization and networking in development of household equipments, this paper designs a smart home security system based on Zigbee wireless sensor network technology and Internet technology. The smart home security system contains smart access control system, smart door and window burglarproof system, gas leakage detection, people positioning, remote video monitoring and database system development. The system takes the advantages of low power, low cost, distributed and self-organized owned by the wireless sensor network to improve flexibility and reliability of the security system. In addition, this paper also designs complete graphic user interfaces for upper computer server and client which are more user-friendly to do local and remote monitoring.

Abstract: This paper collected attribute data of impacting soil erosion factors by RS and GIS, combined soil erosion model, got load and density of soil erosion in Luoning county, Henan province, and analyzed relationship between soil erosion and its main impacting factors. The results indicated soil erosion modulus was 2799.29t/km².a and load was 6495744t, 61% of the county was tiny or light degree erosion, while the serious eroded area which mainly concentrated in western only occupied 20% of the area, but contributed 57.64% of sediment of whole area. There is a basically positive correlation between soil erosion and slope.

Abstract: The SIFT feature matching can overcome the influence of revolve and scale. It can recognize runway effectively under the complex flight environment, but its computation is heavy. In order to reduce the computation, this paper proposes a new fast method of SIFT feature extraction. This method uses a group of concentric squares to construct the Pyramid-feature-descrptor, calculates each seed vector of the Pyramid-feature-descrptor by using the recursion algorithm, and carries simple sort on the elements of each seed vector to maintain the revolving invariability. The experimental result of identifing the runway indicates that this algorithm not only can increase the speed, but also can identify the runway effectively in revolving and scale.

Abstract: In order to make more uniform wheel wear, save production and reduce production costs, we improve the production process and optimize the processing way with the interpolation algorithm and the speed distributed computing by making the error analysis. And then the production process is gradually developed into green, environmental, lower consumption, higher income process.

Abstract: Cruising condition is the crucial condition for cruising endurance of conventional submarine, therefore, the reliability research on conventional submarine cruising condition(CSCC) is valuable.In this paper, the component of a certain type conventional submarine power system was briefly introduced, and the normal cruising condition circuit diagram and the semi-storage-battery cruising conditon circuit diagram were present. Supposing each failure of component is exponentially distributed and is mutual independence, this paper constructed the reliability model of CSCC based on reliability block diagram(RBD). The experimental result shows that the reliability of the CSCC is greater than 0.7 in 60 months and the armatures are the most important components in the power system under cruising condition.

Abstract: With GIS spatial application model, from the angles of space developing and changing, explore the motion and change rules of urban development in the process of urbanization, and improve scientific nature and accuracy of forecast. To analyze the characteristics and their driving forces of changes in urban construction land and urban expansion space, first we have explored space model of urban expansion theoretically, then made some research combining the examples of urban spatial and temporal changes in Luoyang City. Study the laws of urban expansion from the angles of temporal and spatial variation with GIS space analysis model, thereby explore the internal mechanism of urban spatial variation, which can be provided with better research efficiency.

Abstract: How to improve the logistics service quality is one of significant problems for logistics alliance which formed by manufacturing enterprise and TPL. Firstly, the decision behavior of manufacturing enterprise and TPL under decentralized decision is analyzed. Then the results under decentralized and centralized decision are compared, and find that results under decentralized decision are inferior to those under centralized. Based on analyzing the cause of that, the coordination strategy is proposed which manufacturing enterprise motivated TPL to reduce the delay rate with reward contract. The conditions for logistics alliance to realize coordination are conducted, and it is revealed that the Pareto improvement of logistics alliance parties can be achieved and the benefit of logistics alliance can be optimum by choosing appropriate reward, Finally, a numerical example is given to illustrate the correlative conclusions.