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基于反射波法的桩身完整性判别的神经网络模型 被引量:10
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作者 王成华 张薇 《岩土力学》 EI CAS CSCD 北大核心 2003年第6期952-956,共5页
提出了一种基于应力波反射波法判别基桩桩身完整性的BP型神经网络模型。该模型以桩身应力波波形曲线、桩的几何尺寸和桩身混凝土波速等为网络的输入信息,预测作为网络输出信息的桩身完整性特征,如正常、缩径、扩径、离析和开裂等。通过... 提出了一种基于应力波反射波法判别基桩桩身完整性的BP型神经网络模型。该模型以桩身应力波波形曲线、桩的几何尺寸和桩身混凝土波速等为网络的输入信息,预测作为网络输出信息的桩身完整性特征,如正常、缩径、扩径、离析和开裂等。通过采用多种运算改进技术,提高了网络的可行性和计算速度。对天津市软土地基中的数十根灌注桩的实测波形等资料学习和预测,取得了令人满意的精度。 展开更多
关键词 桩身完整性 应力波反射波法 预测精度 bp型神经网络模型 基桩质量检测
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Coal mine safety production forewarning based on improved BP neural network 被引量:38
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作者 Wang Ying Lu Cuijie Zuo Cuiping 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2015年第2期319-324,共6页
Firstly, the early warning index system of coal mine safety production was given from four aspects as per- sonnel, environment, equipment and management. Then, improvement measures which are additional momentum method... Firstly, the early warning index system of coal mine safety production was given from four aspects as per- sonnel, environment, equipment and management. Then, improvement measures which are additional momentum method, adaptive learning rate, particle swarm optimization algorithm, variable weight method and asynchronous learning factor, are used to optimize BP neural network models. Further, the models are applied to a comparative study on coal mine safety warning instance. Results show that the identification precision of MPSO-BP network model is higher than GBP and PSO-BP model, and MPSO- BP model can not only effectively reduce the possibility of the network falling into a local minimum point, but also has fast convergence and high precision, which will provide the scientific basis for the forewarnin~ management of coal mine safetv production. 展开更多
关键词 Improved PSO algorithm bp neural network Coal mine safety production Early warning
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