The effect of key parameters on fatigue life of common metallic components, e.g. steel, aluminium alloy, has been analysed quantitatively. The influential coverage and degree of these parameters have been investigated...The effect of key parameters on fatigue life of common metallic components, e.g. steel, aluminium alloy, has been analysed quantitatively. The influential coverage and degree of these parameters have been investigated systematically, some phenomena which can′t be discovered with qualitative analysis method have been revealed, a series of valuable conclusions has been obtained, which would be very beneficial to fatigue resistant design and improvement of anti fatigue ability of metallic components.展开更多
体系效能评估指标数量多、维数高,指标之间关联,且具有协同效应,加大了效能评估的计算复杂性。针对这一问题,建立考虑协同效应的联合作战体系效能指标灰色主成分分析(grey principal component analysis,GPCA)重构模型。首先,分析联合...体系效能评估指标数量多、维数高,指标之间关联,且具有协同效应,加大了效能评估的计算复杂性。针对这一问题,建立考虑协同效应的联合作战体系效能指标灰色主成分分析(grey principal component analysis,GPCA)重构模型。首先,分析联合防空作战体系的作战使命、任务、流程,构建其效能评估指标体系,并运用灰色关联模型分析指标间是否存在协同效应。其次,基于指标间存在的协同效应,给出3种重构效能评估指标体系的策略,并结合GPCA方法,构建具有协同效应的GPCA模型,对评估指标体系进行降维。最后,将所提方法应用于联合防空作战体系效能评估案例,筛选出具有协同效应的指标,重构效能评估指标体系。计算结果与方法对比分析表明,所提方法能够有效发现指标间的协同效应,重构后的评估指标体系保持了“同构性”。展开更多
基金TheFoundationforScholarsReturnedfromOverseaCNNC! (No .970 48 2 )
文摘The effect of key parameters on fatigue life of common metallic components, e.g. steel, aluminium alloy, has been analysed quantitatively. The influential coverage and degree of these parameters have been investigated systematically, some phenomena which can′t be discovered with qualitative analysis method have been revealed, a series of valuable conclusions has been obtained, which would be very beneficial to fatigue resistant design and improvement of anti fatigue ability of metallic components.
文摘体系效能评估指标数量多、维数高,指标之间关联,且具有协同效应,加大了效能评估的计算复杂性。针对这一问题,建立考虑协同效应的联合作战体系效能指标灰色主成分分析(grey principal component analysis,GPCA)重构模型。首先,分析联合防空作战体系的作战使命、任务、流程,构建其效能评估指标体系,并运用灰色关联模型分析指标间是否存在协同效应。其次,基于指标间存在的协同效应,给出3种重构效能评估指标体系的策略,并结合GPCA方法,构建具有协同效应的GPCA模型,对评估指标体系进行降维。最后,将所提方法应用于联合防空作战体系效能评估案例,筛选出具有协同效应的指标,重构效能评估指标体系。计算结果与方法对比分析表明,所提方法能够有效发现指标间的协同效应,重构后的评估指标体系保持了“同构性”。
