基于灰区间真值的群体决策方法及应用

研究了灰区间偏好的群体决策问题.在专家灰区间偏好群体意见集结过程中,常规的灰区间运算会产生决策信息的失真.为了避免这一缺陷,首先引入了灰区间调节参数的概念,通过建立求解调节参数的二次规划模型,确定专家灰区间判断的真值.建立了专家客观权重求解的二次规划模型,并给出了专家客观权重的最优解.此外,从另外一个角度同时考虑调节参数与客观权重,建立求解灰区间真值与专家客观权重的群体最优决策模型.气象敏感性行业专家群体评估决策的算例表明,决策策略是有效的.     

1993—2004年华东部分地区酸雨的时空分布特征及其与气象条件的关系

分析华东地区15个酸雨观测站的1993—2004年数据资料,结果显示华东地区的酸雨灾害在全国范围内较为严重,其中以长江以南的浙江、福建地区尤为突出.1993—2004年华东地区降水的酸度呈现出先减轻后加重的趋势.降水量是影响华东酸雨的电导率和pH值的重要因素.pH值季节变化由高到低为夏、秋、冬、春,酸雨频率随季节的变化不显著.对同期15个观测站的电导率变化的分析显示,12年间华东地区降水的电导率呈现先稳定后变幅增大的趋势,降水酸度和电导率的年际变化存在显著的正相关关系.应当对影响降水酸度和电导率的相关大气成分加强监测与研究.     

当前人们对马克思主义劳动和劳动价值论的几种曲解

人们在深化对劳动和劳动价值论的研究和认识过程中存在着曲解马克思主义劳动和劳动价值论的几种情况 :认为马克思劳动价值论中的劳动是单指体力劳动 ,认为创造价值的劳动不包括科技劳动 ,认为马克思把管理劳动排除在创造价值的劳动之外 ,认为马克思否认非物质生产领域劳动能创造价值。     

EVALUATION ON NUTRITIVE VALUE OF PORTUNUS TRITUBERCULATUS

MODUon0NP.trituberculatushasanupswellingshuttiedsecephalothoraxcrust0nWhosescheearemanydiversefinegranuleswhichbererneroughandconcentIatalinthegillaas.IthasthIeewartybulgesandtwosharpodhonitSforeheadPaiAiy-U,l986).Thechelipedisdeveloped,itSmerusisshuuleshaped,thefotirthpairofpereiopodsareuseoars,itScarpopoditiswideandshort,thedaCty0poditisslab-shaped,eachjoint'sedgehasshorthahaforswirTuning,themalebodyisbluishgreen,andthebolebodyisadeeppmple.Maleanddrileglands')locateatthedorsalordorsola…     

一阶可变号非线性奇异初值问题

获得了一类一阶可变号非线性奇异初值问题的新结果。     

USE OF VALUE FUNCTIONS AS A POSSIBLE SUITABILITY SCALING PROCEDURE IN AUTOMATED COMPOSITE MAPPING

The application of composite suitability mapping integrated with a geographic information system is progressing at a much faster rate than the methodological improvements necessary for optimal use in the public planning context. The use of value functions is suggested as an alternative scaling procedure that is scientifically and operationally preferable to existing procedures. Value functions limit the operational subjectivity and enhance the potential for replication and verification of the analysis. Value functions are conducive to increased automation of the land planning and decision process while being comprehensible to non-expert decision-makers and the public.     

Extreme Earthquake and Earthquake Perceptibility Study in Greece and its Surrounding Area

The sample interval for the selection of extreme magnitudes plays an important part in the quality of Gumbel model fitting. A short sample interval can produce many observations, which is helpful in obtaining a reliably fitting model. However a short sample interval can bring many dummy ``observations', a condition which adversely biases the fitting. The short sample interval also increases the chance to introduce non-independent observations as well, which violates a basic requirement of the Gumbel model. On the other hand, a large time interval not only reduces the number of observations, but also enlarges the observation error. Thus, for Greece, the most suitable parameters of the third Gumbel extreme model are obtained by using a sample interval which produces minimum error. In consideration of the reliability of the seismic data, earthquakes with magnitude M 5.5 in Greece and its surrounding region after 1900 are used mainly in the present paper. In order to obtain well resolved contour maps with smooth changes a 2°× 2° cell with half-degree overlap strategy was used to scan the region. The most expected largest earthquake for the next fifty, one hundred and two hundred years are estimated for each cell. Likewise, the events with magnitude at a probability of 90\% of non-exceedance over the next fifty, one hundred and two hundred years are estimated for each cell. In parallel to this procedure we also analyze the 67 shallow seismic zones outlined by Papazachos and his colleagues and detail individual zone results where these are obtained. The most perceptible earthquake magnitude for the range of intensities I = {VI}, VII and VIII are also calculated. All results show that the areas around the Hellenic Arc and the Cephalonia Transform Fault for Greece have comparatively high frequency of destructive earthquakes accompanied by a high occurrence probability of moderate earthquakes (M 5.5).     

对地铁结构监测基准点稳定性的研究

本文在研究大量变形监测技术与监测成果的基础上,注意到基准点的稳定性,它直接影响到监测成果的可靠性和客观性,尤其当基准点的稳定性超过两倍测量中误差时,监测成果不仅不能客观反映变形体的变形量,甚至出现较大偏差或错误,从而导致人们对变形体的变形趋势和安全性分析失准。因此,本文对监测基准点稳定性进行深入研究,并通过应用实例提出监测基准点的布设方法和稳定性分析方法。     

GIS在采煤沉陷区生态价值评价中的应用

以淮南市在采煤沉陷区生态治理规划中对规划区的生态价值评价为例,探讨了运用GIS技术和多源信息复合原理对规划区进行生态要素单因子评价和生态价值综合评价,选取评价因子包括地形因子、生态基质因子、植被因子及水环境保护因子。采用遥感与地理信息系统相结合的技术,建立与评价相关的基于GIS的基础数据平台,运用GIS的空间分析功能对规划区的生态价值进行分析和评估。通过对规划区各类生态因子的评价,深入了解规划区内生态价值的特征与空间分布,提取重要生态节点;为挖掘规划区生态建设潜力,实施生态治理和建设提供依据。     

线纹计量器具检定系统表修订建议

JJG 2001-1987《线纹计量器具检定系统》是我国线纹计量器具进行量值传递的检定系统表,但其存在着许多不足,已无法满足当今计量检定的需要。此处对该检定系统表进行详细分析后给出修订建议,并介绍了目前国际上有关动向,提出了一些有益建议。