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石油化工作业工人急性中毒事故分析 被引量:1
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作者 金沈雄 陈昌发 +2 位作者 陈玉清 夏昭林 金复生 《劳动医学》 1999年第2期92-92,共1页
急性中毒事故给国家、企业、家庭和个人都带来严重的损失。本文就我院近20年间所救治的679例石油化工作业工人急性化学中毒的情况作一分析,以便总结经验教训,有效地预防和减少此类事故的发生。1资料来源全部资料取自我所197... 急性中毒事故给国家、企业、家庭和个人都带来严重的损失。本文就我院近20年间所救治的679例石油化工作业工人急性化学中毒的情况作一分析,以便总结经验教训,有效地预防和减少此类事故的发生。1资料来源全部资料取自我所1977~1997年门急诊职业性急性中毒... 展开更多
关键词 石油人工 急性中毒 化学中毒 事故分析
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Improved Crude Oil Price Forecasting With Statistical Learning Methods
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作者 Chokri Slim 《Journal of Modern Accounting and Auditing》 2015年第1期51-62,共12页
Reliable forecasts of the price of oil are of interest for a wide range of applications. For example, central banks and private sector forecasters view the price of oil as one of the key variables in generating macroe... Reliable forecasts of the price of oil are of interest for a wide range of applications. For example, central banks and private sector forecasters view the price of oil as one of the key variables in generating macroeconomic projections and in assessing macroeconomic risks. Of particular interest is the question of the extent to which the price of oil is helpful in predicting recessions. This paper presents a statistical learning method (SLM) based on combined fuzzy system (FS), artificial neural network (ANN), and support vector regression (SVR) to cope with optimum long-term oil price forecasting in noisy, uncertain, and complex environments. A number of quantitative factors were discovered from this model and used as the input. For verification and testing, the West Texas Intermediate (WT1) crude oil spot price is used to test the effectiveness of the proposed learning methodology. Empirical results reveal that the proposed SLM-based forecasting can model the nonlinear relationship between the input variables and price very well. Furthermore, in-sample and out-of-sample prediction performance also demonstrates that the proposed SLM model can produce more accurate prediction results than other nonlinear models. 展开更多
关键词 crude oil price fuzzy system (FS) artificial neural networks (ANNs) support vector regression (SVR)
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