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提出了煤层突出危险性预测的神经网络专家系统的结构,介绍了知识的获取、推理过程及知识的表示和设计方法,实例分析表明,神经网络专家系统适合于预测煤层突出这一极其复杂的动力现象。 相似文献
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对采空区煤炭自然发火进行了危险性评价,从自然发火条件入手,建立采空区自然发火事故模型,确定采空区发火现状危险等级为C级,较危险;利用采空区已有的自然发火预测指标建立BP神经网络的时间序列预测模型,对未来该采空区有无发火危险进行了预测,确定未来采空区发火可能性大小.结果表明:运用BP神经网络的时间序列预测模型对煤炭自然发火进行预测,采空区自然发火处于"有发火危险"程度,发火危险性较大,因此应做好采空区火灾预防工作. 相似文献
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爆破震速预测的模糊神经网络模型及其应用 总被引:2,自引:0,他引:2
利用模糊神经网络的高度鲁棒性和学习能力,模拟爆破参数间的非线性关系。建立了爆破震速预测模型,进而预测爆破质点峰值震动速度。预测结果与工程实际具有较好的相关性。所建立的预测模型对研究爆破震动效应及其灾害的控制具有较高的理论和应用价值。 相似文献
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爆破震动强度预测的神经网络模型研究 总被引:6,自引:2,他引:4
爆破震动控制一直是工程爆破界的一个重要研究课题,而如何对爆破震动进行准确地预测则是进行震动控制的前提和基础。BP神经网络是目前在非线性预测中得到极为广泛的一种神经网络模型,通过建立一个BP神经网络实现了对爆破震动速度的预测,并与常用的线性回归方法进行了比较,结果表明,神经网络预测模型具有更高的精确性。 相似文献
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神经网络模型在爆破震动强度预测中的应用研究 总被引:6,自引:0,他引:6
爆破震动控制一直是工程爆破界的一个重要研究课题 ,而如何对爆破震动进行准确地预测是进行震动控制的前提和基础。本文通过建立一个BP神经网络实现了对爆破震动速度的预测 ,并与常用的线性回归方法进行了比较 ,结果表明神经网络预测模型具有更高的精确性。 相似文献
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通过对开采煤层自燃机理的分析 ,选出了主要的影响因素 ,采用了人工神经网络方法 ,通过对典型样本的学习 ,建立了开采煤层自燃危险性预测的无督神经网络模型。并用“未知”样本进行了验证 ,结果表明了该方法的准确性 相似文献
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Introduction Gas explosion hazard is the most dangerous haz-ard and always the archenemy of safety production in coalmine, and it becomes the essential problem of safety production in coalmine at present. It is neces-sary to identify and assess gas explosion hazard be-cause gas accumulates frequently and it is apt to ex-plode in many places of coalmines especially in head-ing face. Statistically, gas explosion in heading face accounts for about 60%~70% of the total gas explo-sion accident[1]. … 相似文献
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Through analysis on drillability of frozen soil, it is concluded that the main factors affecting the drillability of frozen soil are temperature, wave velocity, impact inductility and chiseling specific work. Based on the foundation it is discussed that applying the neural networks method to classify the drillability of frozen soil is simple and feasible, and the inputted vectors quantity of networks don‘‘t be restricted, which make the classification on ddllability of frozen soil rather well match the objective practice. 相似文献
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基于BP神经网络的磨机调心滚子轴承故障诊断研究 总被引:3,自引:0,他引:3
对BP神经网络在磨机滚动轴承故障诊断的模式表达及相关参数等问题进行了初步研究 ,并利用BP网络对轴承的 4种故障模式进行训练学习和诊断 ,取得了满意的效果。结果表明 :BP神经网络是解决轴承故障诊断中复杂的状态识别问题的一种有效工具。 相似文献
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Function simulation, which is called virtual reality too, is popularly applied to solve uncertain problems. Good performance
of hidden layers and perfect capability of function simulation make artificial neural networks one of the best choices to
simulate functions with form unknown. Inputs and outputs were used to train the structure of the artificial neural network
to make the outputs of network vary with the given inputs and keep consistent with the original data within tolerance. However,
we couldn’t get expected results by using samples of a simple two-variable-model for the cause of dimensional difference.
The way of artificial neural networks to fit functions, which uses “multi-dimensional surface” of high dimension to fit “multi-dimensional
line” of low dimension, was proved; the conclusion that good effects of fitting don’t mean good function modeling when a dimensional
difference exists was provided, and a suggestion of “surface collecting” in practical engineering application was proposed
when collecting useful data. 相似文献
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傅晓锦 《煤炭学报(英文版)》2006,12(1):119-123
Based on the traditional optimization methods about the pressure control spring of the relief valve and combined with the advantages of neural network, this paper put forward the optimization method with many parameters and a lot of constraints based on neural network. The object function of optimization is transformed into the energy function of the neural network and the mathematical model of neural network optimization about the pressure control spring of the relief valve is set up in this method which also puts forward its own algorithm. An example of application shows that network convergence gets stable state of minimization object function E, and object function converges to the utmost minimum point with steady function, then best solution is gained, which makes the design plan better. The algorithm of solution for the problem is effective about the optimum design of the pressure control spring and improves the performance target. 相似文献