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灰色马尔柯夫链方法在设备故障预测中的应用初探 被引量:5
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作者 王清晓 陈家锭 《机械科学与技术》 CSCD 北大核心 1997年第3期491-495,共5页
将灰色马尔柯夫预测模型应用于设备运行状态的预测,实践证明,这种预测方法兼有灰色GM(1,1)预测和马尔柯夫概率矩阵预测的优点,尤其适用于随机波动性较大的数据列的预测。这一应用拓广了灰色预测的应用范围。对轴承振动的预测... 将灰色马尔柯夫预测模型应用于设备运行状态的预测,实践证明,这种预测方法兼有灰色GM(1,1)预测和马尔柯夫概率矩阵预测的优点,尤其适用于随机波动性较大的数据列的预测。这一应用拓广了灰色预测的应用范围。对轴承振动的预测结果表明,该预测模型的预测精度是令人满意的。 展开更多
关键词 马尔柯夫 预测模型 设备故障 概率矩阵预测
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Forecasting and optimal probabilistic scheduling of surplus gas systems in iron and steel industry 被引量:5
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作者 李磊 李红娟 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第4期1437-1447,共11页
To make full use of the gas resource, stabilize the pipe network pressure, and obtain higher economic benefits in the iron and steel industry, the surplus gas prediction and scheduling models were proposed. Before app... To make full use of the gas resource, stabilize the pipe network pressure, and obtain higher economic benefits in the iron and steel industry, the surplus gas prediction and scheduling models were proposed. Before applying the forecasting techniques, a support vector classifier was first used to classify the data, and then the filtering was used to create separate trend and volatility sequences. After forecasting, the Markov chain transition probability matrix was introduced to adjust the residual. Simulation results using surplus gas data from an iron and steel enterprise demonstrate that the constructed SVC-HP-ENN-LSSVM-MC prediction model prediction is accurate, and that the classification accuracy is high under different conditions. Based on this, the scheduling model was constructed for surplus gas operating, and it has been used to investigate the comprehensive measures for managing the operational probabilistic risk and optimize the economic benefit at various working conditions and implementations. It has extended the concepts of traditional surplus gas dispatching systems, and provides a method for enterprises to determine optimal schedules. 展开更多
关键词 surplus gas prediction probabilistic scheduling iron and steel enterprise HP filter Elman neural network(ENN) least squares support vector machine(LSSVM) Markov chain
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