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Established a wireless sensor networks and a concrete plan is brought forward based On ZigBee technology. Corrected the time of network by Time Protocol. The hardware and software of the system is designed. Finally, the application effects of the system are analyzed and compared. The System realized the goals such as low cost, low consumption, high stability, high flexibility and expansibility. The...
In order to solve the communication conflict of the mine personnel positioning system, clustering protocol is employed, in which the node receiving the strongest signal is selected as the new head of the cluster and the members are selected based on the method of RSSI similarity and neighbor node K. Simulation on clustering protocol was performed using the software MATLAB. It indicated that the speed...
With the popularity of the Internet, the extension speed of network resources always lags behind the demands of network bandwidth of network users. It is not an omnipotent solution to increase the available bandwidth. That is why it is important to analyze, control and manage network traffic accurately nowadays. It is reported that, as one of the prominent occupants, peer-to-peer (P2P) traffic takes...
Based on the analysis of the characteristic of HLA and Web Services, this paper advances a distributed simulation based on web enabling HLA and gives two development methods of the web enabling HLA. This method gives a good solution on building good opening and high model scalability distributed simulation environment and supports the interoperability among heterogeneous simulations and enabling reusability...
Recently IPv6 test network has already had considerable scale and relatively abundant network resources. Especially streaming media resources have been established in order to attract more and more users to access it. There is a kind of implementation method of network TV wall based on the streaming media and IPv6 presented in this paper. Compared with the traditional interface, it has visibility...
Regardless of the traditional network, or wireless sensor networks, routing algorithms is the key support for network transmission technology. This paper focuses on the combination of GA and WSN routing algorithm, and analyzes the problem about hierarchy routing algorithm based on GA. Thus, this paper improves hierarchy routing algorithm using GA. The experiment result show that the performance of...
In multi-attribute auctions, score auction is the most prevalent mechanism in practical application. We consider the second-score auction protocol because of its properties of incentive compatibility and individual rationality. In the paper, we use the theory of production possibilities set in DEA to analyze the second-score auction. With the DEA-based cost norms, we revise the payment rule in the...
Nowdays we need read the Electric energy allowance of the watt-hour meter timely when we replace it, and the device in this paper can help us realize this function. This device structures include CPU, buttons, display, communication and other modules. The CPU type is STM32F101V8T6, display module type is 19264, communication module type is RSM485C. The device's software system uses a embedded operating...
Upon detailed analyzes of cycle scanning time of PLC and the message transaction cycle time of PROFIBUS, a analytical model is set up to estimate the response time between master PLC and intelligent slave, and the corresponding formula is given. The impact of system response time on the model is discussed with a distributed control system.
In order to integrate stereo garage devices in a network and realize information sharing, a communication network based on RS485 is designed. The network is simple but stable and useful. Both hardware design and software design are introduced. In hardware design, some primary schematics are proposed. In software design, communication protocols and data structures are discussed. At last, the service...
The design and implementation of network camera based on embedded Linux system and the TMS320DM356 processor is put forward which can be operated on 5-megapixel. At 30 frames per second in full frame rates, It is the video stream up to 2Mbps bit rate to provide resolution of 1280×720 pixels. The sampled video stream which compressed and encoded by the protocol of H.264 can be transferred in the network...
Introduces a design of intelligent release which is used TCP /IP communication protocol. In this paper, dsPIC as the core processor and showing the overall hardware design scheme of intelligent release. It can achieve signal acquisition, signal processing and protect power in the grid. And using Ethernet controller ENC28J60 and TCP / IP protocol stack to achieve the communication of intelligent release.
In this paper, we use the TCP/IP protocol stack and PPP dialer integrated in single chip terminal to gather information, through GPRS wireless communications to connect internet, transmitting the data to the upper monitor to analysis and process, realizing the remote monitoring to the transmission towers' on-line monitoring to ensure the reliability of electricity and raise the ability of troubleshoot.
In this paper, we first present the concept of a “fair” password authentication system which means that when a user provides a password that is unable to pass the authentication, the system is capable of taking a step ahead to detect and determine the real cause of the authentication failure, whether it was the user's own problem or that the authentication files had already been tampered with or damaged...
Marketing activities of companies under the environment of electronic commerce have shown a series of new characteristics because of their marketing operation modes which differ from traditional modes. As a result, a lot of problems and challenges were roused. As one of the key factors of companies' marketing strategy realization, marketing strategy channel under the environment of electronic commerce...
This article describes the design of intelligent control system for air conditioning. Proposed the processing algorithms of the key controlling and the power Fail Safeguard; Design the key priority encoder and the encoder interrupt and status with the programmable logic device, it solved the problem of resource shortage of the microcontroller. Proposed the processing algorithms of the control of steering,...
In order to solve the problem of data monitoring in solar power system, the paper discussed the data acquisition of ARM7 and principle of serial communication. And the design scheme combined GPRS wireless communication and the highly effective energy conservation chip LPC2114 was presented, the system not only made the data information transmit to the monitoring center real-time and effectively, but...
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