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受粗糙集理论中知识约简的启发,在模糊多属性决策理论中提出属性约简的概念,构建属性约简方法,寻求属性集合中所有最简单的保序属性约简子集以及属性约简核.用属性约简子集代替原有的属性集合,通常可以显著简化模糊多属性决策问题.还将此属性约简方法应用到生产线工位绩效评估中,表明此属性约简算法的实用性. 相似文献
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为了提高建筑节能评价的客观性,根据现行建筑节能评价体系中各分项指标对建筑能耗的影响趋势以及建筑节能设计标准中的相关规定和技术要求,结合dest软件计算值,建立建筑节能综合评价决策表,然后采用等距离方法对决策属性值离散、Jelonek算法对属性约简、数据分析法对条件属性值约简,得出并行推理规则,去除重复推理规则得到规则约简。因此,粗糙集理论无需对知识或数据的局部给予主观评价,也就是粗糙集理论对不确定性的程度的描述相对客观。该方法和相关软件相结合,既能处理数据库信息系统,挖掘潜在规律,又克服处理问题精确化;这对于实现建筑节能评价的智能化提供了很好的途径。 相似文献
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基于双隶属模糊支持向量机的中小企业信用评价 总被引:1,自引:0,他引:1
构建了中小企业信用评价的双隶属模糊支持向量机模型(DFSVM),使每个训练样本依双隶属度同时隶属于两个信用类别,并通过粗糙集的属性约简方法确定支持向量机的最优输入指标组合。考虑到银行对于信用风险的厌恶,在模型的训练阶段对样本进行了"非对称"处理。实证结果表明,与传统的判别分析方法相比,建立的企业信用判别模型精度更高,调整后的模型可以进一步降低银行的信用风险。 相似文献
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影响采矿方案的因素错综复杂,为了建立科学合理的采矿方案评价体系,首先将影响因素进行分级,利用模糊数学确定各级影响因素的权重.由于噪声数据的存在,采用优势变精度粗糙集构建采矿方案评价体系,可以辨识规则间的不相容性,对条件属性进行约简,并生成最少偏好规则集,分类质量为100%.然后利用灰色关联度理论对约简后的属性进行优势分析,得到各属性对于方案的重要程度,完善采矿方案评价体系.研究结果表明:优势变精度粗糙集相对于经典粗糙集更具规则性,构建采矿方案评价体系是科学有效的. 相似文献
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针对复杂汽车产品质量难以量化及质量排名参差不齐的问题,综合考虑产品质量、售后服务和包含油耗、使用成本的总拥有成本等质量经济性指标,提出基于扩展VIKOR方法的汽车质量经济性综合评价模型,辅助消费者购买决策。由于评价信息多源和指标主观不确定,引入数值型、区间型及语言变量等混合类型指标量化方法;利用粗糙集属性约简删除冗余指标,确定关键影响因素,并计算熵权;通过构建混合指标欧氏距离公式和VIKOR多属性决策,得出基于综合效用值的多属性约束下的满意妥协解。案例分析验证本文模型能在消费者购车时实现智能推荐,对比是否考虑总拥有成本前后的推荐结果,可知:在不考虑使用成本情景下倾向于推荐价格便宜的产品;而在考虑使用成本等隐形损失情景下推荐高性价比的车型,更加符合购车消费者的实际情形。 相似文献
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Standards are the basis for production enterprises to organize production ex-factory inspection trade 《中国标准化(英文版)》2008,25(1):24-25
Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.…… 相似文献
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Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß. 相似文献
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《中国标准化(英文版)》2014,(4)
正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from 相似文献
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《中国标准化(英文版)》2014,(5)
正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively. 相似文献
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《中国标准化(英文版)》2014,(4)
正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to 相似文献
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刘智洋 《中国标准化(英文版)》2014,(4):M0002-M0002
正The Chinese Premier Li Keqiang's recent trip to the UK has reinforced the China-UK comprehensive strategic partnership;just as the British Prime Minister David Cameron put it,"the relationship is gaining in strength,depth and understanding"after a bucket of business deals being inked worth more than 30 billion US dollars.From the first agreement signing in 2004 to the new agreement of mutual standards recognition and adoption in 相似文献
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《中国标准化(英文版)》2014,(4):3-3
正A national directory of standards complexes for strategic emerging sectors was recently developed and released jointly by 12governmental departments,namely,SAC,NDRC,MOST,MIIT,MEP,MOA,AQSIQ,State Forest Administration,State Administration of Science and Technology for National Defense,State Oceanic Administration and National Railway Administration. 相似文献
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《中国标准化(英文版)》2014,(4)
正Four new national standards on air pollutant emission control offi cially issued by the Ministry of Environment Protection(MEP)together with AQSIQ and SAC has been brought into force from July 1,2014.The Emission standard for air pollutants of coal-burning,oil-burning and gasfi red boilers,which is the strictest emission standard historically,will tackle the stubborn pollution problem of boilers and waste incineration in most of China’s regions. 相似文献
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《新型炭材料》2014,(6):460
New Carbon Materials is a bimonthly journal published with the permission of the Ministry of Science and Technology and of the State News and Publication Agency.The journal is sponsored by the Institute of Coal Chemistry,Chinese Academy of Sciences,and is published by Science Press.Aims and Scope 相似文献
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《中国标准化(英文版)》2014,(5):3-3
正Recently,National Copyright Administration of China(NCAC)has rewarded 215 organizations and 179 individuals for their outstanding efforts on investigating standards copyright infringement and piracy in 2013.Hua Jianhua,the Deputy-Director of National Standards Copyright Protection Workgroup Office won a third prize of the national individual award.In 2012,SAC set up the national standards copyright protection working group,and developed policies to crack down standards infringement and piracy behaviors and to strengthen standards copyright protection. 相似文献