Certification criteria in type I ecolabelling related to metals for sustainable materials management

A sustainable materials management for metals should be achieved to conserve resources of metal minerals. For the sustainable materials management, material flows through the whole life cycle of materials have been recognized by material flow analysis (MFA) studies. Former MFA studies pointed out that cyclic use of metals could be enhanced not only by increasing quantity of recovered scrap but also by upgrading quality of the scrap. In general, the quality is degraded by contaminants which commingle at disassembling processes. The mixture of contaminants depends on usage of materials in products. Here, Type I ecolabelling has a potential to convey messages for avoiding mixture of contaminants to the producers of finished products. In this study, on the basis of a survey on existing certification criteria related to metals in the world, a general concept of certification criteria on sustainable materials management for metals in Type I ecolabelling system is proposed. Finally, we propose six criteria in the form of certification criteria in Type I ecolabelling system.     

A Research on Analytical Method of Driver-Vehicle-Environment System for Construction of Intelligent Driver Support System

In this study, a driver model with the multiple regression and the neural network is constructed to analyze the relationship between the driver's control action and the information that includes data of vehicle behavior and environment. Using these models, effectiveness of the information to control the action of a driver is examined. To evaluate the intelligent driver support systems, Mental Work Load (MWL) model is constructed with the multiple regression and the neural network. MWL is expressed as Heart Rate Variability (HRV). Measured HRV data and calculated HRV data with MWL model show good agreement. Effectiveness of information is examined using the MWL model. From these results, it is shown that the analytical method with the driver's MWL can be used to assess and improve the intelligent driver support systems as the next stage of this research.     

橡胶隔振器有限元建模技术及静态弹性特性分析

以液阻型橡胶隔振器的橡胶主簧为研究对象，利用有限元分析软件ABAQUS和ADINA，建立了轴对称、1／4对称和完整的三维有限元模型；进行了橡胶隔振器有限元建模技术的数值试验分析；探讨了橡胶材料体积近似不可压缩特性的数值确定方法、杂交单元计算稳定性的数值判断方法、单元类型的选择（包括位移与压力节点的匹配方式及其插值函数阶次、单元积分形式等）、橡胶材料的超弹性本构关系的确定等；阐述了基于有限元方法的橡胶隔振器大变形静态弹性特性有限元分析方法。所预测的橡胶主簧的垂向静态弹性特性与实测结果吻合较好。