Advanced Materials Research Vols. 756-759

Abstract: With the rapid development of economy, the requirement for electricity supply is growing dramatically, and the consumers are claiming for higher power supply quality with less outage. Scheduled outage makes a major part of power outage, and it is mainly caused by power grid construction and power equipment maintenance. Scheduled outage has a lot of concerns, such as grid structure, potential outage loss, critical consumers or important occasions, and such factors are changing rapidly with the quick development of distribution network. As a result, the validation and optimization of scheduled outage becomes complicated. Rule engine [1] can describe business rules by pre-defined language, separate such rules from functional code [2], and execute them when trigger condition is satisfied. The application of rule engine can increase system adaptability to business variation, and decrease the system coupling and maintenance cost. With the application of rule engine in scheduled outage management, outage plan can be effectively validated and flexibly optimized, and the outage loss and consumer complaints could be significantly decreased.

Abstract: When multiple source node nodes need to transmit their data packets through a single relay to a common destination, distributed rateless codes can be employed. In this paper, a new kind of completely random rateless codes and its distributed encoding process is proposed based on random matrices theory. The proposed method is very easy to implement. The decoding performance is determined by the rank property of random matrices. Both theoretical analysis and simulation results show that the proposed method is effective.

Abstract: Web of Things has been proposed to facilitate the integration and composition of everyday device like sensors and actuators with existing standards and blueprints. However, the existing researches do not address all the problems such as integrating legacy devices with constrained capabilities, managing the resources with dynamic attributes. In addition, considering the large-scale deployment of devices in WoT, the deployment expense is supposed to be controlled. In this paper, we propose a middleware-based network architecture for the web of things. Within the architecture, we deal with the practical challenges in deployment. A SMART HOME system is developed as the implementation to verify and discuss the proposed architecture.

Abstract: A mobile application meets the highly real-time requirement for data in sensor networks. However mobile applications have to handle many difficulties that do not exist in non-mobile environment. For example, the wireless network provided for mobile is slow, expensive and bandwidth-limited. So mobile application cannot acquire sensor data like a common application does, which will consume a large share of bandwidth, CPU and memory. To address this issue, we propose our design that will limit the concurrently acquisition of the sensor data with a self-adapting mechanism. It can lower the overhead of the system significantly and whats more, it hardly reduces the user experience even in the situation that the total acquisition frequency is limited.

Abstract: By using powerful secondary development tool MapXtreme and combining .NET development platform, Web Geographic Information System (WebGIS) used for the monitoring of the indoor personnel is designed. The system could display real-time location of the indoor personnel on the electronic map through getting the coordinates and other data measured by wireless positioning system combined with map matching. This system follows the browser/server mode (B/S mode), thus the visitors can easily access simply by the browser without the need of installing other application software.

Abstract: The effect of the modulation index of Mach-Zehnder modulator on single sideband (SSB) radio over fiber (RoF) system is investigated, and two different data modulation schemes are considered. The quantitative results suggest that there exist an optimum modulation index, and the system performance could be improved if the data signal is modulated on only optical carrier or sideband.

Abstract: One key issue of seafloor observatory network is to ensure that the whole system operates normally when some equipment failure exists. Branch Unit can cut off the connection between the failure parts and the backbone network automatically and protect other equipment of the network from the impact of equipment failure. This paper proposes a design of the Branch Unit. The Branch Unit uses zener diode to provide power for the control circuits and constructs DWDM system with the help of the OADM. One Branch Unit model was built in this paper. Experiments verify the principle and functions of the Branch Unit and prove the feasibility of the design. The design provides a reference for the realization of the seafloor observatory network.

Abstract: Visual simulation can simulate a variety of situations of actual scene in real-time through the establishment of the virtual scene similar to a real scene. This paper studies on the node localization system for WSN (Wireless Sensor Network). In order to be able to observe the specific information of the node location for the wireless sensor network visually, we can construct scene model and texture process by Creator, then use Vega Prime to develop the visual simulation of node localization for wireless sensor network in the VS2005 platform, and demonstrate the node localization for wireless sensor network in real time and realistically.

Abstract: Based on 3-D model's common formats obj and stp as well as Deep Exploration and Rhino software, this article takes the 1G-scale Pro/E 3-D models as an example, uses third-party format conversion to study and summarize the methods of lightweight conversion of 3-D model. The article has also compared the advantages and disadvantages of four different methods and conducted a feasibility analysis on them, which serves as effective basis for the follow-up work.

Abstract: With the development of computer and biological sciences and information technology, the Internet of things (IOT) technology has been successfully applied to agricultural fields. Twenty-first Centuries is the times that science and technology are rapidly developed. The realization of agricultural modernization and integrated management is the urgently problem needed to be solved for modern agricultural technology. In this background, this paper puts forwards the key technology and existing problems of sunlight greenhouse complex system and intelligent IOT control system through the study of identified collecting and processing process of sunlight greenhouse temperature multi-nodes big system. The paper builds parameters mathematical model for the IOT bearing capacity from four aspects, such as, the occupied bandwidth, delay characteristics of the network, packet loss rate and power consumption, and uses MCU signal amplification system and a signal sensor to jointly control the temperature effect of sunlight greenhouse. Eventually, it finds that the occupied bandwidth of intelligent system has reached 35kb, the highest network delay has reached 20s, and the maximum of packet loss rate has reached 2.5%, which proves that the IOT characteristics of intelligent systems have more controlling complexity than that of the local system.