Papers by Keyword: Node

Abstract: The paper design hardware platform based on network node, and analyze ZigBee protocol architecture and standards of each layer; on based of ZigBee protocol stack, we design the application program of network coordinator and terminal node to realize the data acquisition; design of network system has the characteristics of low cost, small volume, test results show that the mesh topology, network support, can be rapidly deployed, temperature, humidity, light intensity information of the smooth reading environment, that can be used for domestic environmental monitoring field.

Abstract: A new method based on information entropy theory and variable weight theory was used to evaluate urban expressway nodes in the present research. First of all, theory evaluation index system of urban expressway nodes was established on the basis of influence factors. Secondly, constant weight was established based on information entropy theory and state variable weight vectors were chosen according to the interplay of the influence factors. Thirdly, variable weight was established by using the constant weight and state variable weight vectors. Finally, the model was verified by an example. The results showed that the model based on variable weight could better evaluate the importance of urban expressway nodes and provide a theory for planning and designing urban expressway nodes.

Abstract: Reference to the proposed research results and abroad specification, T-stub connection is widely used in engineer steel connection. The calculation of moment-rotation curve for this connection be proposed. The parameters which can connect directly reflect the moment of nodes nodes-the impact corner, By comparing the calculated results with finite element results prove that this method can be a good trend and finite element results coincide.

Abstract: Aiming at the access control problem of the cloud service platform, puts forward the control scheme of multi-level system for multi type coordination.By the definition of cloud services platform multi access control object system,constructs multidimensional Boolean relation matrix. The semantic relation of Boolean matrices, design of large-scale complex network node control system model, and simulate the hierarchical network loop control model.Through the analysis of network model, shows that the research results can better support for cloud services platform in multi-level access, dynamic authorization complexity problems in management control.

Abstract: Wireless sensor network (WSN) is the network which is composed of a large number of intelligent sensor nodes, it has the ability of self-organizing network routing, therefore, it has been widely used. Building wireless sensor networks is the key to WSN nodes. This paper introduces the basic structure of wireless sensor network node based on ARM, and it delivers a detailed analysis on the operating features and the CC2480 hardware interface of the ZigBee processor, what’s more, it specifically talks about the implementation of the Wince driver of WSN nodes.

Abstract: Based on the characteristics of the welding of equal linear velocity of CNC welding machine, this article expounds the calculation of nodes by equal-error method to approach plane curve of cam contour with helix, and some characteristics of the method in the Welding process. Calculating by VC++ Program, we can find the distribution of maximum error and the nodes of plane curve of Cam Contour with CNC welding system of this method. With the system, the program can simulate the trajectory of the soldering point.

Abstract: With the technology development, wireless network has been the important combination of current high and new technology. In order to confirm communication performance and different high-efficiency satisfaction of various users, relay question research of wireless network communication is the hot spot. Take the advantage of cooperation diversity technique can diverse each node in the network system. Moreover, optimize the relationship among each node is the important method of communication technology. This article evaluates relay questions in the wireless network communication. It analyzes relay and protocol, explains three transmission methods in network communication, discuss selection algorithm of multi-relay, and combines genetic algorithm and selection algorithm of multi-relay. In the end, this article provides part of the core codes.

Abstract: Considering to establish a national ammunition warehouse data processing of a large number of real-time monitoring information and real-time transmission to the requirement of server hardware resources, it was proposed to build a national ammunition warehouse distributed test system based on grid technology. Experiments show that the system has a scalable computing capacity, high computational efficiency, low cost, and good application prospect.

Abstract: Nowadays, wireless sensor networks (WSN) focus on sounds and images and other complex patterns such as data collection, processing, transmission, integration and reconstruction. In order to support these types of data, network node processors need the higher requirements. The embedded multi-core processors are able to play a great role. For improving the efficiency of multi core processing node, a cache allocation algorithm which provides suitable cache to parallel tasks is proposed. By experiment verification, the proposed algorithm achieves higher performance than that adopting conventional LRU scheduling algorithm which improves the WSN performance and utilization effectively.

Abstract: Cloud computing has already became one of the most sought-after center topics in the global IT industry, not only IT companies and the famous Internet enterprise, but also in each fields related to computer and the Internet are research and apply the cloud computing. The technology related to Cloud computing has also changed. This paper presents a hybrid P2P network model in the environment of cloud computing, defines the model, research and design the structure of the model, using DHT algorithm located the resource of Hash ring and analyzed the ring node in-and-out in detail. Finally, using the related mathematical theory deduce the performance evaluation results that the model of node can be hierarchical classification, improve the efficiency of information positioning and searching.