Starting from the supposition of time-space substitution, the Langbein-Schumm's Law was applied to deal with response of fluvial erosion System to the changes in mean annual Precipitation induced by global green-h...Starting from the supposition of time-space substitution, the Langbein-Schumm's Law was applied to deal with response of fluvial erosion System to the changes in mean annual Precipitation induced by global green-house warming. As a result, a simple method was put forward to predict change in sediment yield, with Ningxia Hui Autonomous Region in the northern fringe of the Loess Plateau of China as an example. Results show that, even the change in mean annual precipitation is the same, the direction and magnitude of the resultant chang in sediment yteld would be quite different in fferent physico-geographical zones. When mean annual precipitation is increased, sediment yield in arid or semi-arid areas with a mean anntal Peripitation of less than 400 mm will be increased, while sediment yield in sub-humid or humid areas with a mean annual precipitation of more than 400 mm will be decreased.Additionally, the complex response of fluvial erosion system in time series due to the lag of change in vegetation behind the changn in precipitation has also been qualitatively discussed in this paper.展开更多
针对列车轴箱参数关系,给出了正向设计方法的定义,以及列车轴箱参数的边界条件、性能指标和设计参数的定义,提出将质量屋(House of Quality,HoQ)理论和复杂网络理论相结合的办法,并分析出弹簧种类、整备质量及车辆悬挂方式等出度指标较...针对列车轴箱参数关系,给出了正向设计方法的定义,以及列车轴箱参数的边界条件、性能指标和设计参数的定义,提出将质量屋(House of Quality,HoQ)理论和复杂网络理论相结合的办法,并分析出弹簧种类、整备质量及车辆悬挂方式等出度指标较高的参数为重要的边界条件,车体自重、车辆自由振动及车辆悬挂刚度等出入度指标较高的参数为最需考虑的性能指标,阻尼器油缸体积、材料(特性)及弹簧中心横向跨距等入度指标较高的参数为设计时最为重要的设计参数。通过出、入度统一指标公式的计算,得到了轴箱在设计时的关键参数。展开更多
文摘Starting from the supposition of time-space substitution, the Langbein-Schumm's Law was applied to deal with response of fluvial erosion System to the changes in mean annual Precipitation induced by global green-house warming. As a result, a simple method was put forward to predict change in sediment yield, with Ningxia Hui Autonomous Region in the northern fringe of the Loess Plateau of China as an example. Results show that, even the change in mean annual precipitation is the same, the direction and magnitude of the resultant chang in sediment yteld would be quite different in fferent physico-geographical zones. When mean annual precipitation is increased, sediment yield in arid or semi-arid areas with a mean anntal Peripitation of less than 400 mm will be increased, while sediment yield in sub-humid or humid areas with a mean annual precipitation of more than 400 mm will be decreased.Additionally, the complex response of fluvial erosion system in time series due to the lag of change in vegetation behind the changn in precipitation has also been qualitatively discussed in this paper.
文摘针对列车轴箱参数关系,给出了正向设计方法的定义,以及列车轴箱参数的边界条件、性能指标和设计参数的定义,提出将质量屋(House of Quality,HoQ)理论和复杂网络理论相结合的办法,并分析出弹簧种类、整备质量及车辆悬挂方式等出度指标较高的参数为重要的边界条件,车体自重、车辆自由振动及车辆悬挂刚度等出入度指标较高的参数为最需考虑的性能指标,阻尼器油缸体积、材料(特性)及弹簧中心横向跨距等入度指标较高的参数为设计时最为重要的设计参数。通过出、入度统一指标公式的计算,得到了轴箱在设计时的关键参数。
