A proposal to increase the subway fare in Beijing has commuters debating the merits of this move in a city choked with traffic and burgeoning public transport numbers.On June 19, 2011,Beijing Times reported that the c...A proposal to increase the subway fare in Beijing has commuters debating the merits of this move in a city choked with traffic and burgeoning public transport numbers.On June 19, 2011,Beijing Times reported that the city’s transport authority was mulling over instituting a policy of price differences between rush hour and off-peak hours.The proposal is aimed at spreading the mass of subway commuters during rush hours,展开更多
为研究交通流影响因子对噪声的影响,在早晚高峰时段对东北林业大学边和兴路进行连续4个星期的数据调研,运用灰色关联度分析的方法得出了车流量、车速、大型车、中型车和小型车与噪声的关联度分别为0.947,0.868,0.73,0.894,0.942。车流...为研究交通流影响因子对噪声的影响,在早晚高峰时段对东北林业大学边和兴路进行连续4个星期的数据调研,运用灰色关联度分析的方法得出了车流量、车速、大型车、中型车和小型车与噪声的关联度分别为0.947,0.868,0.73,0.894,0.942。车流量与噪声的同步变化程度最高,而大型车与噪声的同步变化程度最低,因为和兴路高峰时段大型车的辆数较少。中型车与小型车与噪声的关联度均大于车速,是因为高峰时段车辆停靠时间较长,所以车型对噪声的影响较大。由此,可以通过更换老旧汽车、减少大型车的进入等方法来降低城市噪声。运用Cadna/A通过改变车流量对居民楼附近的数据进行仿真,得到居民楼附近的噪声分布状况。当车流量从2 000辆/h增加到6 000辆/h时,噪声增加了6 d B,说明车流量对噪声影响较大。研究结果为城市降噪、创造良好的城市声环境提供理论依据。展开更多
文摘A proposal to increase the subway fare in Beijing has commuters debating the merits of this move in a city choked with traffic and burgeoning public transport numbers.On June 19, 2011,Beijing Times reported that the city’s transport authority was mulling over instituting a policy of price differences between rush hour and off-peak hours.The proposal is aimed at spreading the mass of subway commuters during rush hours,
文摘为研究交通流影响因子对噪声的影响,在早晚高峰时段对东北林业大学边和兴路进行连续4个星期的数据调研,运用灰色关联度分析的方法得出了车流量、车速、大型车、中型车和小型车与噪声的关联度分别为0.947,0.868,0.73,0.894,0.942。车流量与噪声的同步变化程度最高,而大型车与噪声的同步变化程度最低,因为和兴路高峰时段大型车的辆数较少。中型车与小型车与噪声的关联度均大于车速,是因为高峰时段车辆停靠时间较长,所以车型对噪声的影响较大。由此,可以通过更换老旧汽车、减少大型车的进入等方法来降低城市噪声。运用Cadna/A通过改变车流量对居民楼附近的数据进行仿真,得到居民楼附近的噪声分布状况。当车流量从2 000辆/h增加到6 000辆/h时,噪声增加了6 d B,说明车流量对噪声影响较大。研究结果为城市降噪、创造良好的城市声环境提供理论依据。