Advanced Materials Research Vol. 1046

Abstract: The development of power line carry technology provides a new possibility way of reform for low-voltage feed switch. We want to find the realization methods and the key technologies of the communication module in the mine use low voltage flameproof feed switch. It also offering solutions in view of the possible interference, and partly using MATLAB simulation analysis methods to validate. Methods of this paper provide a guideline for the design of communication module in the mine use separated explosion low voltage switch.

Abstract: The applied technology in effectiveness of weapons systems is the ability of weapons to complete the task in the offensive and defensive battle field environment. It is the ultimate goal pursued to develop and applied in the system, and is the most important indicator to evaluate the advantages and disadvantages of weapon systems. In this paper, ADC method is proposed to assess weapons systems. The assessment method of the probability of service, hit probability, mobility and protection for a weapon is studied. Firstly, after the components level division of weapons systems, the solution process of system availability row vector is analyzed based on reliability and maintenance-related. Secondly, the characteristics of laser range finder is analyzed, the whole process of search target is simulated. At last, simulation statistics according to the process of antiaircraft gun burst firing to obtain the burst firing kill probabilities is proposed.

Abstract: Remote fault diagnosis in order to realize the mining enterprise equipment requirement, reduce the cost of fault diagnosis system based on VPN remote fault diagnosis system scheme is put forward. VPN technology to establish the enterprise network system, it is reasonable to implement remote connections between corporate headquarters to the mines. It can always track the running status of equipment working in the field of improving customer service response speed. Users can use it to avoid safe hidden trouble, as far as possible to shorten downtime, increase productivity. Field operation shows that our designed system can quickly diagnose the cause of the problem in time to provide a good reference.

Abstract: This paper describes the positioning based on ZigBee network, and it provides location indoor information and node state alarm information. Wireless sensor indoor positioning system consists of 3 types nodes: the coordinator node, reference node and blind. Time synchronization protocol is an efficient synchronization technology star network structure, synchronization to the gateway node as a starting point, each cluster head node synchronization tree network structure. The paper presents novel model of wireless sensor indoor positioning algorithm and time synchronization protocol. Experiments show that the design of indoor positioning system can meet requirement function and performance of nodes positioning system.

Abstract: In order to achieve reliable data transmission in clustering structure based data acquisition systems of wireless sensor network, in this paper, we propose a reliable data transmission scheme based on network coding for clustering wireless sensor network. We use random linear network coding to solve reliable multicast data transmission from base station to other nodes, and then combine random linear network coding with multipath routing for transmitting acquired data to the base station, so as to improve the success rate for sending acquired data to the base station. Simulation results show that the proposed algorithm can achieve reliable data transmission with lower energy, and significantly improve the transmission reliability compared to data transmission without using network coding.

Abstract: The scheduling algorithm is one of the key technologies in LTE-Advanced system. In this paper, a semi-persistent scheduling algorithm designed for the VoIP service in LTE-Advanced system is proposed. The time-frequency resource will be allocated to the users according to the semi-persistent scheduling algorithm based on the gain for each user on the certain RB. By introducing the mechanism and procedure, analyzing the proposed semi-persistent scheduling algorithm combined the source coding (SC) or modulation and coding scheme (MCS) techniques, the superiority of the proposed algorithm is shown. The simulation results indicate that the performance of the proposed semi-persistent scheduling algorithm is better than the traditional algorithms in term of resource utilization ratio, system throughput and scheduling success rate.

Abstract: Concerning the problem that classical time synchronization algorithms applied to large-scale Wireless Sensor Network have low precision and high energy consumption, this paper proposes a time synchronization algorithm based on cluster-tree. The algorithm can decrease the synchronization hop count by constructing a spanning tree, and uses two-way SRS in inter-cluster and one-way ROS in intra-cluster to reduce the number of messages required for the network synchronization. The experimental results show that the algorithm can keep the network synchronization precision at a higher level and effectively reduce energy consumption of nodes compared with the RBS and TPSN.

Abstract: With the wide application of Internet technology, the embedded system is becoming more and more to develop in the direction of the network. The combination of embedded devices and the Internet represents the future direction of development of embedded systems. In this paper, a microprocessor-based embedded Ethernet solution was presented. The collaborative software and hardware design thought was used in system. TheμC /OS-II operating system, joined the TCP/IP protocol stack, was transplanted to the embedded Ethernet platform. The test results proved that the embedded Ethernet system network communication is stable and reliable.

Abstract: Job scheduling and resource allocation problems relate to the overall performance and resource utilization of Hadoop platform. This paper proposes a dynamic adaptive job scheduling algorithm based on Hadoop platform. This algorithm monitors the change of each computing resource nodes in real time. And through the feedback mechanism pass this information to the control node. It implements the purpose of assign the optimal resource for each of tasks.

Abstract: Job scheduling algorithm is one of the key technologies Hadoop platform. In this paper, waiting for a fair scheduling algorithm based on delay resource situation. The algorithm periodically obtain status through the use of cluster resources to determine the wait timeout, it has dynamic. Experimental results show that the Delay Fair Scheduling Algorithm Based On the Resource Situation than the original algorithm to some extent reduces the job run time and improve the throughput of Hadoop platform.