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基于统计数学理论的船舶航行流量预测 被引量:1
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作者 熊伟 黄方方 《舰船科学技术》 北大核心 2019年第24期34-36,共3页
船舶航行流量与多种因素相关,使得船舶航行流量变化复杂,对其进行预测面临巨大的挑战。为了解决当前船舶航行流量预测结果不理想的缺陷,以提高船舶航行流量预测精度为目标,提出基于统计数学理论的船舶航行流量预测方法。首先分析影响航... 船舶航行流量与多种因素相关,使得船舶航行流量变化复杂,对其进行预测面临巨大的挑战。为了解决当前船舶航行流量预测结果不理想的缺陷,以提高船舶航行流量预测精度为目标,提出基于统计数学理论的船舶航行流量预测方法。首先分析影响航行流量的因素,找出航行流量变化规律,然后收集航行流量历史数据,采用统计数学理论对航行流量历史数据进行分析,建立可以描述其变化规律的模型,最后对航行流量预测方法的有效性和优越性进行了测试与分析。结果表明,本文方法的船舶航行流量预测值与实际的航行流量值之间的偏差小,航行流量预测误差小于5%,提高了航行流量预测精度。 展开更多
关键词 船舶航行 流量历史数据 统计数学理论 预测偏差 变化规律
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大型灌区节水改造绩效综合评估模型的构建与应用 被引量:5
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作者 周志宇 《水利技术监督》 2022年第7期96-100,共5页
文章针对传统大型灌区节水改造绩效评估方法与指标选取适配度低,评估结果可信度不高的问题,基于i-Tree模型的评估理论,分别从社会、经济、技术、生态4个层面构建新的大型灌区节水改造绩效综合评估模型,通过优化设计评估指标体系,提高方... 文章针对传统大型灌区节水改造绩效评估方法与指标选取适配度低,评估结果可信度不高的问题,基于i-Tree模型的评估理论,分别从社会、经济、技术、生态4个层面构建新的大型灌区节水改造绩效综合评估模型,通过优化设计评估指标体系,提高方法和指标的适配度。通过实例验证,新构建的评估模型可解决传统方法指标适配度低的问题,评估指标适配度可提高10%以上,从而提高绩效综合评估的可信度。研究成果对于大型灌区节水改造绩效综合评估提供新方法。 展开更多
关键词 i-Tree模型 经济数学统计理论 节水改造 绩效综合评估 大型灌区
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A TREND DISPLACEMENT ANALYSIS FOR SPACE AND TIME ON XINTAN LANDSLIDE
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作者 贺可强 《Journal of Coal Science & Engineering(China)》 1998年第1期51-55,共5页
This paper, having made systematic trend analysis on the front and rear segments of Xintan landslide for space and time respectively by using matbematical statistical principles,discovered that there is obvious trend ... This paper, having made systematic trend analysis on the front and rear segments of Xintan landslide for space and time respectively by using matbematical statistical principles,discovered that there is obvious trend displacement Of the monitoring points in the rear margin area of the slope and the rates of trend displacement gradually increase with time whereas there is no trend displacement of the monitoring points in the front margin area. This result suggests that the rear margin area of segment is an area of overall sliding and is transforming towards destabilization whereas the front margin area is an area of relative stability. This analytical result well coincides with the conclusion of evaluation on dynamic stability. The analytical result mentioned above shows that the medium to short term forecast and prediction of slope stability can be made by using trend displacement analysis technique in order to achieve the goal of timely evaluation and prevention. 展开更多
关键词 trend displacement space and time LANDSLIDE mathematical statistical principle
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Comments on “double—Wave Theory”
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作者 ZHUZhen-He 《Communications in Theoretical Physics》 SCIE CAS CSCD 2003年第3期304-308,共5页
Some falsehoods of the so-called double-wave theory (DWT) are pointed out. The logic and the origin of the DWT, and three of the four fundamental hypotheses of DWT are criticized. It is expounded that the hypothesis o... Some falsehoods of the so-called double-wave theory (DWT) are pointed out. The logic and the origin of the DWT, and three of the four fundamental hypotheses of DWT are criticized. It is expounded that the hypothesis of two wave functions is unreasonable, the hypothesized Hamiltonian differs from the actually used Hamiltonian, and the hypothesized expression of measured values or mean values of mechanical quantities is wrong and does not express the measured values or mean values at all. 展开更多
关键词 quantum mechanics statistical properties deterministic properties double-wave theory mechanical quantities
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Brief Introduction to and Review on Elements of Computational Statistics 被引量:2
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作者 XU Li Quan WANG Zi Kun 《Journal of Mathematical Research and Exposition》 CSCD 2009年第1期153-163,共11页
A brief introduction and review of new book about the Elements of Computational Statistics is given.
关键词 James E. Gentle Elements of Computational Statistics computationally intensive Monte Carlo methods.
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