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Search Results: 1 - 10 of 141736 matches for " 徐永利 "
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柴北缘双口山荒漠戈壁景观区1:5万 “HS-9-4”弱小化探异常的矿化发现及意义

地质与勘探 , 2015,
Abstract: 双口山荒漠、戈壁景观区位于我国柴北缘重要成矿带上。景观区1:5万水系沉积物测量“HS-9-4”综合异常弱小、零散、峰值低;元素空间套合性差,无规律性;多元素仅有1级异常分带。根据其本身自然地理景观,经“衬度异常法”与常规方法对比,发现“HS-9-4”弱小异常值得重视,对该异常开展了查证工作,最终在异常区发现了多处与金相关的矿(化)体及线索,为下一步地质工作提供了可靠依据。
基于函数性数据分析的中国社会消费品零售总额数据的预测
李小星,
- , 2018, DOI: 10.13543/j.bhxbzr.2018.03.017
Abstract: 基于数据的函数性特征,采用函数性数据分析方法对中国社会消费品零售总额进行预测。将总额数据分解为长期趋势成分和季节性波动成分分别进行预测。对长期趋势成分引入居民可支配收入数据来辅助预测,对于季节性成分采用自适应选择权重的加权预测法,将两项预测值的和作为总额预测结果。真实数据上的实验结果表明,本文提出的预测方法预测误差小,且预测结果具有很好的可解释性。
Abstract:The functional data analysis method is used to predict the data of Chinese total retail sales of consumer goods. The total data is decomposed into a long-term trend component and a seasonal fluctuations component, and then the predictions for these two components are carried out respectively. For the long-term trend component, the data of disposable personal income is introduced to support the forecast. For the seasonal component, a weighted selection method with adaptive selection weights is used. The sum of the two predictions is taken as the total forecast. The experimental results using the real data show that the proposed method can give smaller prediction errors and the predictions clearly explain the observed result.
基于函数性数据分析的中国社会消费品零售总额数据研究
贾鑫,
- , 2016, DOI: 10.13543/j.bhxbzr.2016.03.019
Abstract: 运用函数性数据分析中的主微分分析方法对中国 1984 年至 2010 年间的社会消费品零售总额进行拟合,较传统方法获得了更好的拟合效果。 采用两阶段的拟合过程来分别刻画社会消费品零售总额的长期趋势和季节性波动。 结果表明:拟合函数在历年的季节性成分具有大致相同的走势,反映了数据的季节性波动的规律;历年的季节性成分又不是完全重合,而是能够体现年份之间的差异,因而获得了较小的拟合误差。
Abstract:Principal differential analysis has been used to fit the data for Chinese total retail sales of consumer goods from 1984 to 2010, and has been shown to give a better fitting effect than the traditional method. A two phase fitting process is used to describe the long-term trends and seasonal fluctuations of the total retail sales of consumer goods. The fitting function has roughly the same trend in seasonal component of the calendar years, reflecting the seasonal fluctuations of the data. In addition, the seasonal variations in different years are not fully coincident, which thus can reflect the differences between years and give smaller fitting errors.
“收稿日期”标示宜规范化
,朱家龙
中国科技期刊研究 , 1994,
Abstract:
英文科技期刊书眉的编辑加工
,钱俊龙
中国科技期刊研究 , 1992,
Abstract:
对美国《化学文摘》千种表的一见
朱家龙?,
中国科技期刊研究 , 1995,
Abstract:
英文科技期刊书眉的编辑加工
,钱俊龙?
中国科技期刊研究 , 1992,
Abstract:
“收稿日期”标示宜规范化
,朱家龙?
中国科技期刊研究 , 1994,
Abstract:
略谈英语科技论文图题的编写
,钱俊龙?
中国科技期刊研究 , 1993,
Abstract:
高密度聚乙烯-炭黑(hdpe-c)ptc材料的导电机制
,陈汴琨
材料研究学报 , 1995,
Abstract: ?利用炭黑与高密度聚乙烯复合制成了具有ptc功能的导电材料(hdpe-c),根据目前各种导电理论,提出“晶界”导电模型,并推导出了炭黑的填加量(l)、高聚物结晶体大小(α)、碳粒子半径(rc)、碳粒子间距(x)之间的关系.晶界导电模型与实验结果有较好的符合.
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