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Aiming at the power component open circuit faults of the cascaded inverter, the fault model is set up, and the PSO-BP neural network is used to diagnose the faults. At the same time, in order to avoid the premature convergence in the basic PSO algorithm, some mutation operations are conducted upon the particles. The wavelet decomposition is used to extract the fault characteristics for training and...
This paper is an algorithm study of data warehouse based on dynamic plan recognition, integrating pattern recognition and data mining logically. Focused on the issue of establishing data warehouse in data mining study, the study also considered the current situation of researches into dynamic plan recognition.
There are many factors effecting on the NOx formation and fuel characteristics are one of them. Two kinds of coal in common use by one 300MW coal-fired generating unit were chose as typical fuels. Experimentations and numerical simulations were done to study the effects of coal characteristics on NOx formation. The results of experimentations and numerical simulations were similar. In elemental analysis,...
The evaluation of communication link is crucial to wireless sensor networks. A link evaluation algorithm based on mean LQI and mean RSSI is proposed by analysis of a large mount of data collected from communication tests. This algorithm can improve the speed and precision of evaluation for communication link, and improve the reliability of wireless sensor networks. Then EPA based Frequency Hopping...
Currently, the parameter characterizing scattering performance of airborne antenna is still the free space radar cross section (free space RCS). However, without considering the coupling between antennas and the plane, this parameter does not adequately reflect the effects how the antenna affects the plane's RCS after installation. To solve this problem, this article researches the coupling effects...
The electromagnetic environment around the satellite is quite complex, it is necessary to analyze the electric field sensitivity of the receiver to ensure the electromagnetic compatibility among the on-board equipments. Based on the combination of the behavioral simulation and the numerical simulation of electromagnetic fields, this paper proposed a detailed and engineering method for the analytical...
It is known to all that potential global climate change has a great deal to do with anthropogenic emissions of CO2. The carbon dioxide emissions from the exhaust gases of the fossil fuel-fired power plants account for about a third of global CO2 emissions and are increasing in the last decades. At this context, this work presents a survey on the carbon dioxide capture technologies from the power plants...
Firstly, the article introduces the WIA-PA wireless network which is under study at present and can be used for industrial control. Aiming to FTSP algorithm can be used correctly in this network, combined with the unique TDMA media access control method of this network, this article takes a way building the logic synchronization tree to improve the precision of multi-hop FTSP clock synchronization...
Evaluating nodes importance in the network is an important research topic in the fields of complex networks, social network analysis and graph-based data mining. Enlightened by the knowledge of physical field, this paper proposes a topological ranking algorithm based on data field theory. Its basic idea is that each node in the network can be viewed as a material particle which creates a potential...
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