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Preheater has the characteristic of strongly nonlinear, large-lag, serious coupling, greatly disturbed etc. Building a dynamic model of preheater is very difficult. In this paper, the work principle of preheater was analyzed; some key parameters were selected, and preheater was described by a dynamic model which is based on RBF-ARX model. Emphasis is also put on the design of the structure of RBF-ARX...
The combustion in circulated fluidized-bed (CFB) boiler is a complex and multi-variables coupling process. It is too difficult to build an exact mathematic model to describe the process. The main steam pressure control is an important subsystem of burning system, and it is difficult for the norm PID algorithm to control it. According to these, the human-simulated intelligent control technique is applied...
Based on the sense of burning zone and the characteristics of burning process in cement vertical kiln, systemic classification and definition of burning zone state for vertical kiln is made using fuzzy control theory and the fuzzy identification method for cement vertical kiln is proposed. These establish the base for the fuzzy control of production of cement vertical kiln.
E-learning has evolved dramatically in the past decades. With the emergence of more and more advanced technologies such as Web services, development of light weight, flexible, and intelligent E-learning systems becomes a reality. This paper proposes a novel architecture for E-learning systems based on Web services and intelligent agents. This architecture provides a flexible integration model in which...
In this paper, we combine computational intelligence tools: neural network, fuzzy logic, and genetic algorithm to develop a data mining framework (DMFBCI), which discovers patterns and represents them in understandable forms. In the DMFBCI, input data are preprocessed by fuzzification or one-of-m coding, then, principal component analysis (PCA) is applied to reduce the dimensions of the preprocessed...
The nonlinear characteristic of an LED (light emitting diode) imposes limitations on the performance of indoor optical wireless (OW) systems when using intensity modulation in combination with OFDM (orthogonal frequency division multiplexing). First, the impact of the nonlinear characteristic on bit-error performance is analyzed using a commercially available LED (OSRAM, SFH 4230). Second, the paper...
The geographic information service (GIS) raises requirements for high performance computation, large-scale spatial database and sharing of other distributed resources in different system. In this paper, we analyze the deficiencies of current application systems and the requirements of GIS. We construct the distributed GIS on grid platform. Considering the flexibility and efficiency, we integrate the...
In Automatic Question Answering System, topic identification is usually based on relevancy computation of sentences. This paper introduces an approach to compute topic relevancy. Using the semantic computation in HowNet, the relevancy of sentences can be calculated. The topic relevancy of sentences can be calculated through the computation of relevancy between words of sentence and subject words....
The article presents a new way to apply IP multicast technology in computer laboratory teaching, this system can keep the data transmission in a limited area, so as to increase the efficiency of network.
Analyzing existing location modeling, this paper addresses location issues in ubiquitous mobile computing and presents a semantic location model, which introduces query and context semantics into this user-centered model, to support context-awareness based cooperative mobile event. An event-reasoning mechanism, based on semantic matching, is established to recognize and make use of semantics. A natural...
Coverage control is one of the key problems of research and applications of wireless sensor networks. In this paper, the coverage control problem for hybrid networks which comprise both static and mobile sensors is investigated. A strategy for the discovery and determination of coverage blind spots based on Voronoi diagram is presented. For the situation that there are many blind spots in the same...
Wireless sensor network is a new information acquisition and processing technology, which is widely used in monitoring systems. Taking into account that the physical topology of the mine is relatively fixed, as well as that the energy can be added to the mobile nodes, in this paper we propose an energy-efficient wireless sensor network routing algorithm to adapt to the mine environment. Demonstrated...
The paper focuses on quality of service (QoS) provision schemes in wireless access networks. In allusion to the limitations of mobile IP in fast and efficient handoff, it is proposed a QoS solution of micro-mobile IP and RSVP loosely coupled-advanced weak dynamic resource reservation protocol (AWDRSVP).This mechanism can minimize resource reservation delays and signaling overheads, which combines...
There is an increasing interest in uncertain and probabilistic databases arising in application domains such as sensor networks, information retrieval, mobile object data management, information extraction, and data integration. A range of different approaches have been proposed to find the frequent items in uncertain database. But there is little work on processing such query in distributed, in-network...
An intelligent network self-healing solution with regard to the current problem existing in the dedicated network was proposed in this paper. The solution can implement the self-healing by introducing intelligent network self-healing devices which were developed and produced on our own between outside and inside networks, without changing of the current network structure. The devices enable the 1+1...
Data explosion and higher energy consumption in flooding routing of WSN is a considerable problem. A directed flooding routing mechanism according to the sensor nodespsila hop count is presented. In this paper a distributed algorithm to calculate the node-hop is designed and a data packets forwarding criterion using node-hop is constructed. With the methods the data packetspsila broadcast scale can...
Multi-channel communication in a Wireless Mesh Network with routers having multiple radio interfaces significantly enhances the network capacity. Efficient channel assignment is critical for realization of optimal throughput in such networks. This paper addresses the channel assignment problem for multi-channel multi-interface (radio) wireless mesh networks. We focus on static wireless mesh networks...
Peer to Peer (P2P) as well as mobile ad hoc networks (MANETs) follows the same idea of creating a network without the help of central entities. Both networks are faced with the same fundamental challenge - routing. Distributed Hash Tables (DHTs) have recently proven to be a novel and efficient way for locating objects. Routing protocols of MANETs can potentially benefit from the combination with DHTs...
Energy efficiency is a critical consideration in the design of low cost sensor networks. This paper studies the problem of extending the lifetime of the sensor networks as far as possible while maintaining the quality of network coverage. A systematical analysis on the relationship between the network lifetime and cover sets alternation is given, and by introducing the concept of time weight factor,...
The sensor network deployment plays an important role in achieving good network coverage and workload balance. In this paper, we propose a distributed deployment scheme by jointly exploiting the concepts of entropy and the Voronoi diagram. This approach first removes redundant sensor nodes through entropy evaluation, and then redeploy the redundant nodes with help of Voronoi diagrams to acquire fine...
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