共查询到20条相似文献,搜索用时 93 毫秒
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神经网络在宝钢连铸漏钢预报系统中的应用 总被引:1,自引:0,他引:1
介绍了连铸粘结性漏钢产生的机理和过程,以及宝钢利用人工神经网络技术建立的一套新的漏钢预报系统。该系统在预报精度和系统性能等方面均优于宝钢原有的漏钢预报装置。 相似文献
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以现场收集的四钢轧SS400热轧板的原始化学成分、终轧厚度、实测的力学性能数据为基础,通过回归模型和人工神经网络BP算法建模,确定其相互关系,并最终通过其化学成分和终轧厚度来预测产品力学性能。现场使用证明,在现有的条件下,回归模型比人工神经网络更适用。经测试,其抗拉强度预报值与实测值的相对误差有80%7g超过5%,屈服强度预报值与实测值的相对误差有76%不超过10%,延伸率预报值与实测值的相对误差有77%不超过10%。 相似文献
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用人工神经网络模型预测高碳钢高速线材力学性能 总被引:4,自引:1,他引:3
以现场正交试验数据为基础,采用人工神经网络方法预测高碳钢高碳钢高速线材产品力学性能,将预报结果与试验结果相比较可知,该模型具有较高的精度。 相似文献
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Sang Hyun Sohn Sea Cheon Oh Byung Wan Jo Yeong-Koo Yeo 《Canadian Metallurgical Quarterly》2000,126(8):688-696
The atmospheric ozone concentration in Seoul was forecasted using an artificial neural network and spatiotemporal analysis. The artificial neural network was trained by using hourly pollutant and meteorological data that resulted in complex patterns of ozone formation. The finite-volume method was employed in the spatiotemporal analysis in order to take into account the effects of wind. Time horizons in the forecasts were 1–6 h and 16–21 h. The resulting predictions of ozone formation were compared to measured data. From the comparison, it was found that the neural network method gave reliable accuracy within a limited prediction horizon. 相似文献
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In this report the development of an artificial neural network, capable of predicting the temperature after the last finishing stand of a hot strip mill for a certain class of steels, is described. Three neural networks with different numbers of hidden nodes (3, 5 and 7) were trained. The relative standard deviation in finish temperature as predicted by the best performing neural network model (7 hidden nodes) was just over 25% smaller than that of the linear Hoogovens model. This improved accuracy can be explained by the incorrect assumption in the Hoogovens model of linear dependence of the finishing temperature on some input parameters. With the trained neural network, the influence of the various input parameters on the finishing temperature could be examined. The dependencies predicted by the neural network can be approximated by a linear fit and are a factor 2 lower for all input parameters. It is conceivable that operation of the mill using an artificial neural network for the prediction of the finishing temperature would have resulted in smaller operational fluctuations. 相似文献
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将模糊理论和人工神经网络理论相结合,建立了一种自适应神经模糊推理系统(ANFIS),应用于地下工程围岩稳定性分类.并根据收集到的围岩分类资料作为样本来训练和测试网络模型.预测结果表明,该模型能较好地用于地下硐室围岩分类. 相似文献
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An artificial neural network based methodology is applied for predicting the level of organizational effectiveness in a construction firm. The methodology uses the competing value approach to identify 14 variables. These are conceptualized from four general categories of organizational characteristics relevant for examining effectiveness: structural context; person-oriented processes; strategic means and ends; and organizational flexibility, rules, and regulations. In this study, effectiveness is operationalized as the level of performance in construction projects accomplished by the firm in the past 10 years. Cross-sectional data has been collected from firms operating in institutional and commercial construction. A multilayer back-propagation neural network based on the statistical analysis of training data has been developed and trained. Findings show that by applying a combination of the statistical analysis and artificial neural network to a realistic data set, high prediction accuracy is possible. 相似文献