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Research on Some Questions About Selection of Independent Variables

第十二届工业工程和工程管理国际会议

作者： ZHANG Lianying pan jing dept. of engineering management Tianjin University Tianjin P. R. China 300072

＜正＞By analyzing the present conditions of safety management of the construction business in China,the main shortages of safety management are pointed out in this paper. The useful experience of safety management of the U.K and several other European countries are introduced. And some effective and feasible measures of construction safety management are investigated. The research result is useful to the construction business.

关键词： Safety management HSE Construction busmess Improvement

来源： cnki会议评论

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Systems Science and Systems engineering 2002年第4期11卷 471-478页

作者： TAO jing-xuandept.of management Science and engineering, China Institute of Metrology, Hangzhou 310034, China dept.of management Science and engineering China Institute of Metrology tangzhou 310034 China

The paper studies four methods about selection of independent variables in multivariate analysis. In general condition, advanced statistical method and backward statistical method could not obtain the best subset of independent variables. It is possibly affected by the orders of variables or associations among variables. When multicollinearity is presented in a set of explanatory variables-abnormal state, it is not effective to use the method, although stepwise regression and optimum selecting method of total subsets is widely used.;According to this case, the paper proposes a new method which combines deleting variables with ingredient analysis and is used in research and science practically.;The important characteristic of this paper is that it gives some examples to support each conclusion.

关键词： selection of independent variables multicollinearity stepwise regression subset of variables

污染物在下包气带非饱水条件下迁移转化的研究

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环境科学 1989年第2期10卷 2-6页

作者：聂永丰刘兆昌李亚东清华大学环境工程研究所

一、前言城市污水施于农田,其中的污染物可能潜入地下水中造成危害,为了控制这种现象的发生,有必要开展污染物在地下包括下包气带的迁移转化规律研究,以供制订有关标准的依据。

关键词：污染物下包气带非饱和土层

Quantifying both climate and land use/cover changes on runoff variation in Han River basin, China

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Frontiers of Earth Science 2022年第3期16卷 711-733页

作者： jing TIAN Shenglian GUO Jiabo YIN Zhengke pan Feng XIONG Shaokun HE State Key Laboratory of Water Resources and Hydropower engineering Science Wuhan UniversityWuhan 430072China Changjiang Institute of Survey PlanningDesign and ResearchWuhan 430010China Bureau of Hydrology Changjiang Water Resources CommissionWuhan 430010China

Climate change and land use/cover change(LUCC)can both exert great impacts on the generation processes of precipitation and ***,previous studies usually neglected considering the contribution component of future LUCC in evaluating changes in hydrological *** this study,an integrated framework is developed to quantify and partition the impact of climate change and LUCC on future runoff ***,a daily bias correction(DBC)method and the Cellular Automaton-Markov(CA-Markov)model are used to project future climate and LUCC scenarios,and then future runoff is simulated by the calibrated Soil and Water Assessment Tool(SWAT)model with different climate and LUCC ***,the uncertainty of future runoff and the contribution rate of the two driving factors are systematically *** Han River basin in China was selected as a case *** indicate that:1)both climate change and LUCC will contribute to future runoff intensification,the variation of future runoff under combined climate and LUCC is larger than these under climate change or LUCC alone;2)the projected uncertainty of median value of multi-models under RCP4.5(RCP8.5)will reach 18.14%(20.34%),12.18%(14.71%),11.01%(13.95%),and 11.41%(14.34%)at Baihe,Ankang,Danjiangkou,and Huangzhuang stations,respectively;3)the contribution rate of climate change to runoff at Baihe,Ankang,Danjiangkou,and Huangzhuang stations under RCP4.5(RCP8.5)are 91%-98%(84%-94%),while LUCC to runoff under RCP4.5(RCP8.5)only accounts for 2%-9%(6%-16%)in the annual *** study may provide useful adaptive strategies for policymakers on future water resources planning and management.

关键词： climate change LUCC runoff response uncertainty analysis contribution rate

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二沉池排泥方式初探

土木工程与管理学报 1989年第2期27卷 48-52页

作者：许劲武汉城市建设学院环境工程系

本文根据现场测定和对生物相的观察,指出某市污水净化厂二沉池污泥上浮的原因和解决办法。

关键词：二沉池停留时间污泥上浮生物相

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多属性综合评价的一种新方法

系统工程理论与实践 1994年第9期14卷 58-62页

作者：郭亚军潘德惠东北工学院管理工程系

本文针对多属性的综合评价问题，提出了一种先分类后排序的综合评价方法。这种方法可使评价指标的权重系数的作用发挥得恰到好处，从而避免了排序的“串套”现象。此外，该方法还具有简单、合理，便于应用等特点。最后，应用本方法对我... 详细信息

本文针对多属性的综合评价问题，提出了一种先分类后排序的综合评价方法。这种方法可使评价指标的权重系数的作用发挥得恰到好处，从而避免了排序的“串套”现象。此外，该方法还具有简单、合理，便于应用等特点。最后，应用本方法对我国重点钢铁企业的发展状况进行了综合评价，并与用原有方法的评价结果作了比较。

关键词：多属性综合评价凸集有效集分类排序

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南水北调中线工程水源地旅游项目开发研究

十堰职业技术学院学报 2002年第1期15卷 36-41页

作者：靖增群十堰职业技术学院管理工程系湖北十堰442000

在旅游日益红火兴旺的今天 ,南水北调中线工程水源地的旅游发展却非常缓慢 ,其原因之一就是缺乏主要的旅游吸引物。本文针对这一问题 ,提出了水源地旅游项目开发的原则与创意 ,并阐释了其开发的可行性。

关键词：南水北调中线工程水源地旅游项目开发生态保护武汉文化

Laser diode pumped LNYAB self-frequency-doubling lasers

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Chinese Journal of Lasers 1993年第2期 3-8页

作者： Yujing Huo, Hongbing Wu, Jinxing Cai,Bingkun Zhou, (dept. of Electronic engineering, Tsinghua Univ. ,Beijing 100084,China)Pu Wang,Hengfu pan, jing Xue, Baosheng Lu (Institute of Crystal Materials, Shandong Univ. ,Jinan 250100,China)

The LNYAB self-doubling laser pumped by (LD) has been developed for the first time. The properties of the lasers are much better than those of NYAB self-doubling lasers pumped by LD. The LNYAB self-doubling laser pumped by LD can be operated in TEM00mode with threshold pumping power of 3.6mW which is lower than that of LD pumped NYAB self-doubling lasers by 74%. The output power is 29mW at 0.531μm in green region with optical-to-optical efficiency of 4.8% which is higher than that of NYAB self-doubling laser by 20%.

关键词： LD pumping LNYAB self-doubling fundamental transverse mode

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试论大武当旅游的山水一体化战略

十堰职业技术学院学报 2001年第3期14卷 21-24页

作者：靖增群十堰职业技术学院管理工程系湖北十堰442000

以武当山为龙头的十堰旅游业要形成大旅游、大产业 ,就必须实行大战略。大战略的核心吸引物“山(武当山 )、水 (丹江口水库 )”的一体化开发建设 ,在南水北调之际尤显重要。本文提出山水一体化战略的概念 ,对其必要性与可行性进行了阐... 详细信息

以武当山为龙头的十堰旅游业要形成大旅游、大产业 ,就必须实行大战略。大战略的核心吸引物“山(武当山 )、水 (丹江口水库 )”的一体化开发建设 ,在南水北调之际尤显重要。本文提出山水一体化战略的概念 ,对其必要性与可行性进行了阐述 ,并提出了方向性建议。

关键词： “大武当旅游” 山水一体化战略武当山十堰市旅游业可持续发展