Advanced Materials Research Vols. 926-930

Abstract: Low-power wireless sensor networks (WSNs) design involves all aspects of research in wireless sensor networks. As energy is limited in wireless sensor networks, how to effectively manage and use energy of WSNs, and how to maximize the reduction of power consumption in WSNs and extend the lifetime of WSNs become a key problem faced by wireless sensor networks. Aimed at these problems, a low-power clustering routing algorithm based on load-balanced is proposed. The algorithm introduced an energy load factor to reduce the power consumption of WSNs. The simulation results show that the low-power routing algorithm can effectively reduce power consumption of networks and extend the lifetime of networks.

Abstract: The basic frame of Example based machine translation is concerned in this paper. Some key issues, such as bilingual alignment, similarity measure between input sentence and example, and template acquisition, are introduced.

Abstract: Software FLAC^3D will be used to analyse the mechanics performance of soil nailing, including the force and distribution law of the soil nail,subsidence and horizontal displacement changes.The generalized shear strain can be got after calculating.The safety factor after each step of excavation can be shown ,and this mothed provides a good basis for concrete construction.

Abstract: Fuzzy clustering is a kind of language approximation method. It is a multivariate analysis method to classify samples based on the attribute diversity by using fuzzy mathematic method. From the diversity and complexity of impact tendency indicators of coal mine and rock, paper started with extreme value standardization and combined the classification indicators of impact tendency of coal mine and rock, then determined the fuzzy rating, membership function and weight set. Afterwards, paper established the fuzzy similar matrix by using cosine method, then transformed it into equivalent matrix, and did the fuzzy clustering analysis at last. The result shows that the method overcomes the irrationalities which made by existence of impact tendency, achieves a more accurate classification and evaluation, and provides a new method to the comprehensive evaluation of coal rock impact tendency.

Abstract: Based on the Nagel-Schrekenberg (NaSch) model, a cellular automation model is proposed to describe the mixing traffic flow in a single-lane roundabout with open boundary condition. In this model, the impact of the injection probability and the mixed proportion coefficient on the mixed traffic flow is emphatically studied. Simulation results indicate that the injection probability can change the system density, velocity and flow in a certain range for a constant mixed proportion coefficient. Moreover, for a fixed injection probability, when the injection probability is lower than the critical level, the system average velocity will be more affected by the mixed proportion coefficient, By contrast, the system flow will not change by the mixed proportion coefficient; When the injection probability is higher than the critical level, the mixed proportion coefficient can only change the system density, average velocity and flow in a small range.

Abstract: based on the main road into a two lane entrance ramp system the open boundary conditions, using the asymmetric lane changing rules, considering driver behavior characteristics, from standpoint of safety driving ,simulate the entrance ramp system. We get a basic road map different entrance probability of flow, velocity, and analyze the driving safety.compared with reference, and the reference results show that after considering driver behavior, in the ramp at the interface, reduce the interaction with the main ramp,not only the system traffic flow in each section is improved, and but also improve the driving safety.Considering the entrance ramp system driver behavior can be simulated more in line with the running state of the vehicle in real life.

Abstract: In this paper we investigate the existence of positive solution of the following nonlinear discrete third-order two-point boundary value problem. whereis continuous and there existssuch that . Our approach relies on the Krasnosel'skii fixed point theorem. An example is given to demonstrate the application of the theorem obtained.

Abstract: For cognitive radio environment needs of different users, A space-time diversity multi-carrier code division multiple access (OFDM-CDMA) technology architecture of the cognitive radio (CR) system is used, a novel non-cooperative power control algorithm and the price game (NPGP), in order to protect the economic interests of the spectrum of network providers, to achieve a fair and efficient allocation of spectrum resources have cognitive and improve spectrum efficiency. Simulation results show that the algorithm under the protection of the economic spectrum premise network provider benefits, both to ensure the fair and efficient allocation of spectrum resources, and achieve effective control of power users, system performance improved significantly.

Abstract: Through Mathematical derivation can be R(d) the parameters of the function expression R (s), but is generally must use computers that are to be evaluated specific iterations. According to R (d) definitions of functions, to seek the iterative algorithms for key is to first search for describes the mutual information of both a pair of independent variables. This selected, namely mutual information can be represented as . Through the simulation, study attained R(d) of the main properties of the function.

Abstract: Collaborative Filtering (CF) is one of the most popular techniques used in recommendation systems. User-based CF uses rating data to calculate similarity between users and is effective in traditional recommendation systems. However, it does not work well when applied in tag recommendation systems as there are tags with same semantics which does not match literally. Based on tag concept category, the improvement of traditional CF is achieved by compressing the dataset, analyzing the users preference and extracting the tags objective characteristics. The result of experiment shows the more satisfied accuracy than the traditional one does.