基于“TOPSIS／DEA／AHP”模型的战略性供应商选择

研究了供应链环境下战略性供应商选择的问题.通过分析和总结供应商评价选择的准则、指标和方法,以供应链核心企业选择战略性供应商为目标,提出了战略性供应商评价的指标体系,利用整体DEA有效模型来反映供应商的绩效,利用AHP反映供应链核心企业选择供应商的主观愿望,从而构建了TOPSIS与整体DEA有效相结合的"TOPSIS/DEA/AHP"战略性供应商评价选择模型,并通过实证分析,证实了该模型及方法的可行性.     

基于DEA灵敏度分析的物流系统综合评价研究

首先针对多目标系统建立了评价模型,将DEA和交叉系数矩阵法相结合,对模型进行求解,对所有的决策单元进行排序,避免了AHP排序的主观性;考虑实际数据采集误差对评价结果的影响,在评价模型的基础上建立了DEA灵敏度分析模型,对评价结果的可靠性进行了剖析,通过复合形法确立了评价结果的稳定区间.与传统求解DEA模型的单纯形法相比,其更灵活易变,并可求解非线性规划问题,收敛精度较好,能够有效地处理不等式的优化设计问题.最后通过对物流系统综合评价的实例,验证了上述模型和方法的可行性、实用性及有效性.     

基于神经网络训练的战略分析和协商机制的绩效评价

论述了绩效管理模型的发展历程和发展趋势，介绍了BP神经网络评价模型形成的原理，综合运用多种方法建立了财务指标和非财务指标相结合的企业投资决策战略绩效评价的一般指标体系，采用了主成分分析和专家判断相结合的方法对企业投资决策绩效评价指标进行筛选。建立了基于SWOT战略分析和BP神经网络训练的企业投资决策绩效评价模型，并运用该模型对武钢焦化企业投资项目进行了实证分析。     

公交企业运营绩效的信息熵与SE-DEA组合评价方法

提出了基于信息熵与超效率DEA模型(SE-DEA)的公交企业运营绩效组合评价方法,弥补了传统DEA模型无法对多个有效率单元再排序的缺陷,并降低了SE-DEA模型受指标维度影响的风险,进一步提高了其判别能力。以12家公交企业为研究对象,将公交行业监管、公交企业运营服务与乘客出行需求相结合,基于组合评价方法对公交企业运营绩效进行评价,并与SE-DEA模型得到的评价结果进行对比分析。结果表明,公交企业运营绩效值波动较大;组合评价方法所得到的公交企业运营绩效排序结果与SE-DEA模型得到的排序结果在总体趋势上是一致的,但两者测算的运营绩效值相差很大,且前者的判别能力比后者更强。根据评价结果提出可行建议,以便于顺利实施"优先发展公共交通"的战略。     

基于"组合评价"方法的第三方物流企业评价选择

将"组合评价"方法的思路应用于第三方物流企业评价选择的研究中,建立了基于AHP和因子分析法的DEA评价模型和指标体系,并用实例加以验证,为生产制造型企业评价选择第三方物流企业提供了方法论依据.     

基于模糊AHP和TOPSIS的企业知识吸收能力评价

建立了企业知识吸收能力的评价指标体系,并提出了基于模糊AHP和TOPSIS的评价方法。借助模糊AHP方法确定评价指标的三角模糊权重,并用重心法对模糊权重进行反模糊化;运用模糊TOPSIS方法构建模糊加权评价矩阵,计算各企业方案与理想解之间的相对贴近度,从而比较出各企业吸收能力强弱。通过实例分析验证了该方法的实用性和有效性。     

基于互补判断矩阵排序的供应商绩效评价方法

提出了一种基于互补判断矩阵排序的供应商绩效评价方法.由多位专家对供应商的绩效进行两两比较并进行评分;评分结果以互补判断矩阵的形式构造出相应的评价矩阵;利用权的最小平方法计算互补判断矩阵的排序向量;将排序向量中的分量按照大小排列,得到供应商绩效的比较结果.算例的计算过程和结果表明,该方法具有很好的可操作性.     

基于蓝色经济区的甩挂运输物流绩效评价研究

基于山东半岛蓝色经济区甩挂运输行业,运用平衡记分卡与AHP——模糊综合评价法并结合MATLAB7.0数学软件,以及模糊数学理论构建了甩挂运输企业的绩效模糊综合评价模型,并对某一运用甩挂运输的上市物流公司实例进行了模型的应用。     

基于SGS模型与AHP的侦测无人机造型设计研究

目的 为了满足无人机用户需求,完善侦测无人机造型设计方法,进一步拓展产品设计路径。方法 将管理学中的门径管理模型(SGS)融入产品系统开发设计流程;调研用户需求并结合层次分析法(AHP)构建判断矩阵,计算各个设计指标权重并排序,以此促进设计决策,完成侦测无人机造型设计方案;采用7点量表法进行初步方案设计评价,验证设计模型和过程的科学性。结论 以侦测无人机造型设计为例,通过构建SGS产品系统开发模型,运用AHP分析方法进行设计方案指标决策,为侦测无人机造型设计拓展设计路径,为相关产品的设计提供新思路。     

基于模糊AHP的第三方物流企业服务质量评价研究

从第三方物流企业服务质量评价的实际出发,提出了服务质量的评价准则,并基于梯形模糊数的AHP法构建评价的层次结构确定出准则的权重;定义了企业悲观相似度和乐观相似度的概念,在此基础上应用去模糊技术得出企业在二级准则下的绩效指数及排序;确定出被评价企业在服务质量上的合成绩效指数及其排序。通过一个仿真实例说明了所提方法的有效性。     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

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.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Brainstorming for ISO Strategy 2016-2020

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     

CNAS Passes APLAC's PTP Review

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.     

新闻(英文)

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