基于灰关联分析的有向图法评价陶瓷材料的磨削加工性

提出一种新的陶瓷材料磨削加工性评价方法——灰关联分析的有向图法。该方法首先应用灰关联分析方法确定影响陶瓷材料磨削加工性的各种性能因素间的相关关系。在此基础上结合有向图法进行陶瓷材料磨削加工性的综合评价。以SiC、Al2O3、ZrO2和Si3N4四种陶瓷材料为例。应用该方法进行评价。评价结果能够准确地反映各种陶瓷材料的磨削加工性。     

用灰关联分析法确定性能参数对陶瓷材料磨削加工性的影响

选择反映磨削加工性系统行为的加工过程／输出参数，作为系统特征变量，选择陶瓷材料的性能参数为相关因素变量，应用灰关联分析法，分别生成各变量的处理数据序列，建立系统特征变量和相关因素变量的绝对灰关联度矩阵，利用优势分析原则确定陶瓷材料各种性能参数对其磨削加工性的影响程度。以SiC、Al2O3、Si3N4和ZrO2 4种陶瓷材料为例，应用灰关联分析法确定出4种性能参数对陶瓷材料磨削加工性影响程度的排序。研究实例表明，灰关联分析法是确定陶瓷材料性能参数对磨削加工性的影响程度的一种合理、有效的方法。     

产品协同创新开发的决策模型与灰关联分析

设计决策与分析评价是设计工作中密切相关的两项工作。提出了支持产品协同创新开发的决策模型，并分析其决策过程。建立了产品方案分析评价指标体系及灰关联分析评价模型，提供对产品的协同创新开发方案分析、优选的决策支持。研究了基于层次分析法的加权灰关联分析方法．改善分析评价的可信度和可靠性。研制方案分析评价系统，给出了断路器机构系统协同创新方案分析评价实例。应用表明了决策模型和分析方法的正确性及高效性。     

灰关联分析的制造企业第三方物流服务商评价研究

根据制造企业实际需求、第三方物流服务商的特点及制造业与物流业的联动模式,从服务商的实力指标、服务指标、发展潜力、联盟性和服务价格五个因素入手,构建了制造企业第三方物流服务商的评价指标体系,结合灰关联评价方法进行评价算例研究。实例分析验证,该指标体系和灰关联评价方法用于制造企业综合评价物流服务商是有效的和实用的。     

工件材料切削加工性的灰关联分析

采用灰色关联分析的方法,对材料的物理机械性能进行分析,可以综合评价出多种材料的相对切削加工性,即对多种材料的切削加工难易程序进行排序,也可以评估出每一种材料的切削加工难点。     

基于云-TOPSIS-灰关联分析模型的产品服务系统方案评价技术

方案评价是产品服务系统设计的关键环节之一,评价结果的合理性对企业发展至关重要。基于最小平方和法,构建了云-TOPSIS-灰关联分析模型,对产品服务系统方案进行评价。引入云模型和相对偏好关系量化离散型指标,解决专家评价的模糊性和随机性问题。运用TOPSIS灰关联分析法确定正、负理想灰关联系数矩阵,集成指标权重和正、负理想灰关联系数矩阵建立正、负理想加权灰关联系数矩阵,兼顾了几何方案序列曲线的位置接近度和形状相似度。运用最小平方和法求解灰关联投影系数,确定方案排序。以某农业装备企业拖拉机产品服务系统方案评价为实例,验证了所提模型的科学性和可行性。     

液压系统油液污染度评估的加权灰关联分析方法

分析了液压系统污染度等级评估标准中存在的不足 ,提出了一种污染度评估的加权灰关联分析方法。该方法克服了实际液压系统中颗粒尺寸分布难以满足原标准 5个尺寸范围规定的不足 ;通过权重的选择 ,综合考虑了实际液压系统的敏感尺寸、液压系统实际运行情况等因素的影响 ,使得污染度等级的评定更具针对性和灵活性。     

不锈钢高速磨削加工冷却工艺分析

针对不锈钢高速磨削加工时产生的质量问题,通过对磨削区温度特性分析和几种冷却工艺对比,提出实现不锈钢产品高速、环保、高效磨削加工的关键是采用低压除尘冷却液与高压冷风组合的冷却新工艺.     

基于AHP和三角模糊数的磨削工艺绿色度评价指标权重分析

建立了磨削工艺绿色度评价层次结构模型,并分析了其指标层权重计算的方法.在对AHP法和三角模糊数研究的基础上,提出了一种基于AHP和三角模糊数的磨削工艺绿色度评价指标权重分析法,建立了数学模型并给出实例分析.为面向现绿色制造的磨削工艺参数优化提供了理论基础.     

绿色机床评价指标体系的分析

提出了绿色机床的基本特征，并分析了绿色机床的评价指标体系。     

基于改进的AHP和灰色关联分析在实例检索中的应用

在基于实例推理的产品智能化设计中,实例检索是其实现的关键.本文结合最近邻法原理,利用改进的层次分析法确定实例属性权重,灰色关联分析计算属性相似度,由此求得实例之间的总体相似度.根据总体相似度排序与相似度阈值,得到需求解问题的最佳实例.最后,结合后装压缩式垃圾车装填装置的设计,给出了该检索模型的算例,证明其具有较好的实用性.     

Optimization of cryogenic cooled EDM process parameters using grey relational analysis

This paper presents an experimental investigation on cryogenic cooling of liquid nitrogen (LN₂) copper electrode in the electrical discharge machining (EDM) process. The optimization of the EDM process parameters, such as the electrode environment (conventional electrode and cryogenically cooled electrode in EDM), discharge current, pulse on time, gap voltage on material removal rate, electrode wear, and surface roughness on machining of AlSiCp metal matrix composite using multiple performance characteristics on grey relational analysis was investigated. The L₁₈ orthogonal array was utilized to examine the process parameters, and the optimal levels of the process parameters were identified through grey relational analysis. Experimental data were analyzed through analysis of variance. Scanning electron microscopy analysis was conducted to study the characteristics of the machined surface.     

基于灰色关联分析与自适应混沌差分进化算法的激光熔覆工艺参数优化方法

多道搭接激光熔覆工艺具有复杂性与耦合性,熔覆层质量受到工艺参数的直接影响.为确定最佳的工艺参数,以45钢表面多道搭接激光熔覆M2合金粉末为例,针对工艺参数对熔覆层宽度、表面平整度和稀释率的影响,设计相应的中心复合实验;通过灰色关联分析(GRA)建立熔覆层质量综合评价度,将多目标优化问题转化为单目标,并采用响应面分析法建...     

Optimizing multi-requirements of surface finishing in magnetic abrasive cutting process using grey relational analysis

Journal of Mechanical Science and Technology - Mechanical machining inevitably generates undesirable parts on the surface of workpieces. It brings adverse effects in terms of manufacturing cost,...     

基于灰关联分析的质量功能配置方法研究

传统质量功能配置中,通常存在顾客需求重要度的确定具有主观性强、准确性差的问题.为此,提出了基于灰关联分析的质量功能配置方法.该方法通过灰关联对顾客需求重要度进行排序,根据顾客需求间的序关系确定顾客需求重要度,用灰关联矩阵代替质量屋中的关系矩阵,具有简单、客观的特点,为产品质量功能配置过程中关键措施和瓶颈技术的确定提供了更加科学的依据.     

Multiple process parameter optimization of wire electrical discharge machining on Inconel 825 using Taguchi grey relational analysis

In this paper, an effective approach, Taguchi grey relational analysis, has been applied to experimental results of wire cut electrical discharge machining (WEDM) on Inconel 825 with consideration of multiple response measures. The approach combines the orthogonal array design of experiment with grey relational analysis. The main objective of this study is to obtain improved material removal rate, surface roughness, and spark gap. Grey relational theory is adopted to determine the best process parameters that optimize the response measures. The experiment has been done by using Taguchi’s orthogonal array L36 (2¹?×?3⁷). Each experiment was conducted under different conditions of input parameters. The response table and the grey relational grade for each level of the machining parameters have been established. From 36 experiments, the best combination of parameters was found. The experimental results confirm that the proposed method in this study effectively improves the machining performance of WEDM process.     

Grey relational analysis coupled with principal component analysis for optimisation design of the process parameters in in-feed centreless cylindrical grinding

This paper investigates optimisation design of an in-feed centreless cylindrical grinding process performed on EN52 austenitic valve steel (DIN: X45CrSi93). The major performance characteristics selected to evaluate the process are surface roughness, out of cylindricity of the valve stem and diametral tolerance, and the corresponding centreless cylindrical grinding parameters are dressing feed, grinding feed, dwell time and cycle time. In this study, since the process is with multiple-performance characteristics, therefore, the grey relational analysis that uses grey relational grade as performance index is specially adopted to determine the optimal combination of centreless cylindrical grinding parameters. Moreover, the principal component analysis is applied to evaluate the weighting values corresponding to various performance characteristics so that their relative importance can be properly and objectively described. The results of confirmation experiments reveal that grey relational analysis coupled with principal component analysis can effectively be used to obtain the optimal combination of centreless cylindrical grinding parameters. Hence, this confirms that the proposed approach in this study can be a useful tool to improve the centreless cylindrical grinding performance of valve stem in in-feed centreless cylindrical grinding process.     

AHP法在校园网系统质量评价体系中的应用分析

通常对校园网只能给出定性的评价,却很难给出比较合理的定量的评价,本文主要论述的就是如何利用AHP法对校园网给出比较科学和合理的定性与定量相结合的评价方法.     

Integrating sustainability into supplier selection with analytical hierarchy process and improved grey relational analysis: a case of telecom industry

Supplier selection is one of the critical problems in supply chain systems. Within the last decades, by the emergence of sustainability concept, companies have been motivated to enhance their supplier’s sustainability and move toward sustainable development. This paper proposes a structured and integrated decision model for evaluating sustainable suppliers in the context of telecom industry by combining analytical hierarchy process (AHP) and improved grey relational analysis (IGRA) approaches. The proposed model employs AHP for calculating sustainability criteria weights and IGRA for ranking suppliers. Moreover, a sensitivity analysis is also performed to demonstrate the robustness of the model. In this research, the sustainable supplier selection problem of the telecom industry in the southern part of Iran was investigated, showing the effectiveness and applicability of this proposed integrated approach.