Design change is one of the most common activities in design and development of mechanical products, and the change will affected by the design and maintenance of the products. It is not uncommon that multiple compone...Design change is one of the most common activities in design and development of mechanical products, and the change will affected by the design and maintenance of the products. It is not uncommon that multiple components might run out of order simultaneously during the use of a product, which would have significant influences on the product performance. Such kind of multi-component failure must be considered early in the product design stage, therefore it is necessary to study multiple design changes incurred by multi-component failure. Existing studies on the design change only focus on single change and ignore multiple simultaneous changes. To address this problem, a change influence network model is establishes, and the propagation path of multiple changes on the change influence network is described according to the change propagation characteristics of mechanical products. By analyzing the degree of dependence between the nodes and the absorption situations of nodes to change propagation, the possible paths of change propagation on the change influence network are determined, and based on which, calculation of the change influence is carried out, which provides decision-making support for product designers. Finally, the feasibility of the proposed methodology is demonstrated by taking a household juicer for case study.展开更多
随着Web技术的发展,微博逐渐成为当下最流行的社交平台之一。微博中用户影响力计算是相关研究中的焦点问题。通过对PageRank模型的改进,提出一种新的用户影响力挖掘算法PR4WB(PageRank for Micro Blogs),解决了传统的PageRank算法由于...随着Web技术的发展,微博逐渐成为当下最流行的社交平台之一。微博中用户影响力计算是相关研究中的焦点问题。通过对PageRank模型的改进,提出一种新的用户影响力挖掘算法PR4WB(PageRank for Micro Blogs),解决了传统的PageRank算法由于页面权威值的等分传递带来的潜在误差过大的问题。PR4WB算法在考虑微博中用户关系的同时,利用社会网络概念将自身的活跃度、博文质量及可信性加以关联,形成动态的评价模型。基于Twitter数据的实验表明,PR4WB算法能更加准确、客观地反映出用户的实际影响力。展开更多
文摘Design change is one of the most common activities in design and development of mechanical products, and the change will affected by the design and maintenance of the products. It is not uncommon that multiple components might run out of order simultaneously during the use of a product, which would have significant influences on the product performance. Such kind of multi-component failure must be considered early in the product design stage, therefore it is necessary to study multiple design changes incurred by multi-component failure. Existing studies on the design change only focus on single change and ignore multiple simultaneous changes. To address this problem, a change influence network model is establishes, and the propagation path of multiple changes on the change influence network is described according to the change propagation characteristics of mechanical products. By analyzing the degree of dependence between the nodes and the absorption situations of nodes to change propagation, the possible paths of change propagation on the change influence network are determined, and based on which, calculation of the change influence is carried out, which provides decision-making support for product designers. Finally, the feasibility of the proposed methodology is demonstrated by taking a household juicer for case study.
文摘随着Web技术的发展,微博逐渐成为当下最流行的社交平台之一。微博中用户影响力计算是相关研究中的焦点问题。通过对PageRank模型的改进,提出一种新的用户影响力挖掘算法PR4WB(PageRank for Micro Blogs),解决了传统的PageRank算法由于页面权威值的等分传递带来的潜在误差过大的问题。PR4WB算法在考虑微博中用户关系的同时,利用社会网络概念将自身的活跃度、博文质量及可信性加以关联,形成动态的评价模型。基于Twitter数据的实验表明,PR4WB算法能更加准确、客观地反映出用户的实际影响力。
