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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。
- This non sequitur invalidates his argument. 他不根据前提推理因而论证无效。
- 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。
- The hermetic confines of an isolated life. 与世隔绝生活的不受外界干扰的区域
- Patience is a sine qua non for a good teacher. 做个优秀教师必不可少的条件是要有耐心。
- The diplomat was declared persona non grata. 这位外交家被宣布为不受欢迎的使节。
- Sufferers from the infectious disease are isolated. 感染到这种传染病的人被隔离起来。
- 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。
- The street is overarched by ginkgoes. 那条街道给拱形的银杏树遮盖着。
- He is declared personal non grata and forced to leave the country. 他被宣布为不受欢迎的人而被迫离开该国。
- The enemy was holed up in a few isolated strongholds. 敌人龟缩在几个孤立的据点里。
- A loud noise from the street diverted my attention. 街上一阵喧闹声转移了我的注意力。