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基于层次分析与模糊综合评判的突出危险程度预测 总被引:3,自引:0,他引:3
针对煤与瓦斯突出预测缺乏定量评价方法,将层次分析与模糊综合评判运用到煤与瓦斯突出危险程度预测中,使用层次分析法确定了煤与瓦斯突出各影响因素权重系数,运用模糊综合评判法建立了煤与瓦斯突出危险程度预测模型。最后,对某煤矿9煤层进行了煤与瓦斯突出危险性预测。结果表明,应用层次分析与模糊综合评判进行煤与瓦斯突出危险程度预测是可行的。 相似文献
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传统的模糊C-均值聚类在处理煤与瓦斯突出的预测时,由于其对初始聚类中心的过度依赖而导致预测结果准确率的降低。为了准确预测煤与瓦斯突出,提出了一种基于自适应权重模糊C-均值聚类的煤与瓦斯突出预测方法。该方法将瓦斯浓度相关影响因素作为特征空间中的样本,采用高斯距离比例表示权重,动态计算每个样本对于类的权重,对特征空间中的样本进行聚类分析预测,降低了算法对初始聚类中心的依赖。实例验证表明:所提出的方法具有较高的预测精度,具有较大的实用价值。 相似文献
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模糊神经网络技术在煤与瓦斯突出预测中的应用 总被引:19,自引:1,他引:18
由于煤与瓦斯突出发生的内在机理的复杂性、突出影响因素与突出事件之间的相关规律的不精确性和模糊性, 使得基于经验的传统预测方法和基于数学建模的统计预测方法的应用都受到很大限制. 而具有表达、处理不精确信息和实现信息影射变换双重特性的模糊神经网络, 通过训练能够捕捉、把握影响突出的因素与突出事件之间的特定相关规律, 从而有望实现煤与瓦斯突出的正确预测. 相似文献
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煤与瓦斯突出灰色-神经网络预测模型的建立及应用 总被引:4,自引:0,他引:4
对煤与瓦斯突出影响因素进行灰关联分析,以此确定人工神经网络的输入参数.并应用改进的BP算法,选择灰关联分析的5个优势因子作为输入参数,建立了煤与瓦斯突出预测的神经网络模型.选用典型突出矿井的煤与瓦斯突出实例作为学习样本,对网络进行训练学习,并以云南恩洪煤矿的煤与瓦斯突出实例作为预测样本,将经过网络预测的结果与传统方法的计算结果进行对比.结果表明该灰色一神经网络模型能够满足煤与瓦斯突出预测的要求. 相似文献
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The danger degree evaluation of coal and gas outburst is mainly evaluating spot risk using the safety examination table and
the evaluation value can be found. According to factors influence coal and gas outburst majorth were qualitative or fuzzy
similar factors, used fuzzy gathering classification method for the coal and the gas outburst analysis, established fuzzy
model, according to the model adopted the fuzzy similar selective principle proceeding evaluated. Two kinds methods join together
analysis can raise on the accuracy rate of the prediction.
Supported by the National Natural Science Foundation of China(50674052) 相似文献
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煤与瓦斯突出综合预测的集对分析模型与应用 总被引:2,自引:0,他引:2
针对煤与瓦斯突出的复杂性,应用集对理论,进行了同、异、反分析,确立了煤与瓦斯突出指标和突出可能性之间的联系度,进而建立了预测煤与瓦斯突出的集对分析模型。实例表明,集对分析方法能够较好地预测煤与瓦斯突出的可能性,是预测模糊系统的一种有效的、科学的方法。 相似文献
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为有效预测矿井内煤与瓦斯突出的危险程度,对其影响因素做了分析与探讨,分别构建了基于粒子群优化算法以及遗传算法支持向量机的煤与瓦斯突出预测模型,并且通过实例对两种模型预测的准确性进行了验证。分别利用单项以及综合指标、BP神经网络以及PSO-SVM模型、GA-SVM模型,对寺河煤矿二号井的突出区域进行预测比较。结果表明,PSO-SVM的预测模型不仅可以在小样本数据中预测出煤与瓦斯突出程度的大小,而且综合预测结果更加精确,其在解决矿井内煤与瓦斯突出的小样本数据中显示出更加强大、通用的性能。 相似文献
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In order to predict the danger of coal and gas outburst in mine coal layer correctly, on the basis of the VLBP and LMBP algorithm in Matlab neural network toolbox, one kind of modified BP neural network was put forth to speed up the network convergence speed in this paper. Firstly, according to the characteristics of coal and gas outburst, five key influencing factors such as excavation depth, pressure of gas, and geologic destroy degree were selected as the judging indexes of coal and gas outburst. Secondly, the prediction model for coal and gas outburst was built. Finally, it was verified by practical examples. Practical application demonstrates that, on the one hand, the modified BP prediction model based on the Matlab neural network toolbox can overcome the disadvantages of constringency and, on the other hand, it has fast convergence speed and good prediction accuracy. The analysis and computing results show that the computing speed by LMBP algorithm is faster than by VLBP algorithm but needs more memory. And the resuits show that the prediction results are identical with actual results and this model is a very efficient prediction method for mine coal and gas outburst, and has an important practical meaning for the mine production safety. So we conclude that it can be used to predict coal and gas outburst precisely in actual engineering. 相似文献