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综采工作面生产指标预测的改进型BP神经网络 被引量:8
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作者 俞书伟 王新宇 +1 位作者 时成忠 王洪欣 《煤炭学报》 EI CAS CSCD 北大核心 1999年第2期132-136,共5页
应用几种改进BP算法,提高了BP神经网络的收敛速度与稳定性,详细描述了神经网络预测产量及工效的求解机理与具体实施步骤.重点研究了网络学习前后的数据处理工作、网络结构的确定方法以及网络合理的学习步数.
关键词 BP神经网络 综采 产量 生产指标预测 采煤
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Exploring Individual Lifetime Wellbeing: An Optimal Year of Birth
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作者 Aled W. Jones Yingting Qian Rosalyn A. V. Robison 《Sociology Study》 2014年第9期802-817,共16页
This paper aims to explore the concept of wellbeing from an individual's perspective. Current indicators of wellbeing [including economic indicators such as Gross Domestic Product (GDP)] are static indicators--they... This paper aims to explore the concept of wellbeing from an individual's perspective. Current indicators of wellbeing [including economic indicators such as Gross Domestic Product (GDP)] are static indicators--they take into account issues as they are in a given period of time such as the current year. However, these indicators fail to measure the sense of wellbeing felt by an individual over a lifetime, and therefore could miss important issues of relevance when developing policy and other interventions to improve wellbeing. Various wellbeing indicators for the OK over the period of 1945-2013 are explored. These indicators are used to develop a "lifetime wellbeing" measure. The indicators are grouped and predictions of indicators into the future are made. The data show that some indicators have peaked and are now in decline. Therefore, under a certain choice of indicators and weightings, it is possible to maximise wellbeing over a person's lifetime meaning, there may have been an optimum year in which to be born. 展开更多
关键词 SUSTAINABILITY wellbeing INDICATORS development
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