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- isolated street canyon 孤立街道峡谷
- It shows that when %A% is more than 2.1, a stable vortex formed within the urban street canyon become two vortexes. 各类型街谷内污染物扩散水平从强到弱依次为迎风面建筑物高度大于背风面建筑物高度的街道峡谷,迎风面建筑物高度小于背风面建筑物高度的街道峡谷;
- This paper describes the current study on vehicle pollutants dispersion in the urban street canyon. 本文叙述了目前城市街道峡谷内机动车污染物扩散的研究现状。
- High pollution levels often occurred in urban street canyon due to the increased traffic emissions and reduced natural ventilation. 机动车尾气排放不断增加以及城市通风能力降低,常导致城市街谷内的空气污染。
- The dispersion characteristics of vehicular pollutant within street canyon were analyzed by using the method of numerical calculation. 摘要通过数值计算的方法分析了城市街道峡谷内机动车排气污染物的扩散特性。
- In this article, a numerical model was used to study the relationship between street canyon characteristics and diffusive and wind characteristics. 结果表明:当街道峡谷高宽比>2.;1时;街谷内的流场结构由一个完整的垂直涡旋变为上下两个反向运动的强弱不同的垂直涡旋。
- This study presented the distribution and dispersion characteristics of vehicular pollutant within a given street canyon, and the results of this work can provide the basis for the environmental control of street canyon. 研究工作给出了特定街道峡谷内的机动车排气污染物的分布特征及扩散规律，可以为城市街道峡谷的环境控制提供依据。
- Study on street canyon flows with bottom heating 日光照射地面对街道峡谷内流场的影响研究
- He beckoned to me from across the street. 他在马路对面向我招手致意。
- In present study,an urban street canyon dispersion model developed in our unit was used for the simulation of fluid fields and vehicle emissions' dispersion in the typical street canyons. 采用自主开发的街道峡谷内污染物扩散模式,对城市中几种典型的街道峡谷内流场和污染物的浓度场进行了模拟研究。
- A canyon usually has a river flowing through it. 峡谷常常有河流经过其中。
- Abstract Based on Reynolds stress turbulence model,airflow fields within urban street canyons under different building heights were simulated. 摘要 应用雷诺应力湍流模型,模拟了不同高度比的城市街道峡谷的气流场。
- Arizona is famous for the Grand Canyon. 亚利桑那州因科罗拉多大峡谷而著名。
- The hermetic confines of an isolated life. 与世隔绝生活的不受外界干扰的区域
- Sufferers from the infectious disease are isolated. 感染到这种传染病的人被隔离起来。
- The main methods for studying the atmospheric environment in street canyons include field observations, reduced-scale physical models and mathematical models. 城市街谷大气环境主要研究方法包括外场观测、实验室物理模拟和数值计算。
- The street is overarched by ginkgoes. 那条街道给拱形的银杏树遮盖着。
- The enemy was holed up in a few isolated strongholds. 敌人龟缩在几个孤立的据点里。
- In the paper,mathematical statistics and fuzzy mathematics method were utilized to optimize the monitoring time with CO and NO2 as the monitoring gas in urban street canyons. 以CO和NO2为监测气体,应用数理统计和模糊数学方法,对城市街道峡谷机动车排放的日监测时段进行了优化。
- A loud noise from the street diverted my attention. 街上一阵喧闹声转移了我的注意力。
