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Conventional PCA method for fault detection and diagnosis has a high rate of false positives and false negatives due to most industrial processes with nonlinear and non-Gaussian characteristics. For a class of the problem of fault detection and diagnosis associated with nonlinear and non-Gaussian, an improved wavelet kernel KPCA method is proposed, It adopts kernel principal component analysis methods...
In order to realize the spare parts supply accurate security scheme decision, this paper built up equipment spare parts accurate security scheme decision index system. We analyzed the alternatives of the spare parts accurate security based on set pair method and selected out the best supply project.
Naive Bayes classifier is widely used in machine learning for its simplicity and efficiency. However, most of the existing work on naïve Bayes focused on improving the Bayes model itself or whether the “naïve assumption” is satisfied. In this paper, the performance of naïve bayes in text classification is analyzed and the corresponding results from different points of view is proposed, then an improving...
The scheduling problem of reservoir hydroelectric station during the flood season caused major concern in academia and industry many years. Due to the uncertainty of flood, the schedule strategy should guarantee the enough flood prevention capacity of hydroelectric, meanwhile, a certain water head should also be kept in order to guarantee the power generation efficiency. Therefore, it's a challenging...
Demand response behaviors of retailers are very important for dynamic pricing mechanism design and analysis. This paper presents a multi-agent system to simulate the household response to dynamic pricing. In each household, the best activities under real time pricing for every major electricity devices with their own characteristics and flexibilities are formulated as mixed integrated linear programming...
Many industrial processes are nonlinear distributed parameter systems (DPS) that have significant spatio-temporal dynamics. Due to different production and working conditions, they often need to work at a large operating range with multiple working points. However, direct global modeling and persistently exciting experiment in a large working region are very costly in many cases. Complex spatio-temporal...
Lightning is the main reason that endangers the safety and reliability of transmission line, and impulse grounding resistance is the main factor that affects the lightning withstand level of line. The common calculation method of impulse grounding resistance multiplying power frequency resistance by impulse coefficient is widely accepted in simulation model, and assumes that it is constant. However,...
The feasibility of using constructed mangrove wetlands to treat saline municipal wastewater was evaluated in this study. Constructed wetland, acting as an ecological engineering alternative, is capable of reducing NH4+-N, TN, TP and COD from saline wastewater. During the 10 months' operating period, the constructed wetland was operated with salinity increasing from 10 to 50 parts per thousands (ppt)...
In order to solve the problem of self-integrating Rogowski coil failing in measuring High-frequency Traveling wave current accurately, this paper come up with a System Identification solution based on Rogowski coil measuring. Through analyzing the measuring principles of Rogowski coil and using Square wave response to establish the Transfer function of the measurement system, digital correction of...
Because of the complex influencing factors, it is very difficulty to resolve the problem of large scale pillar extraction and goaf disposal in underground mine. Fortunately, with the rapid development of computational mechanics, numerical methods and computer technology, the feasibility of numerical simulation has become an important feature of the current rock mass mechanics. Accordingly, using the...
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