检索结果-南通市图书馆

维普期刊数据库

puff Models for Simulation of Fugitive Hazardous Emissions in Atmosphere

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Protection 2011年第2期2卷 154-161页

作者： Ledina Lentz Pereira Camila Pinto da Costa Marco Tullio Vilhena Tiziano Tirabassi 不详

A puff model for the dispersion of material from fugitive hazardous emissions is presented. For vertical diffusion the model is based on general techniques for solving time dependent advection-diffusion equation: the ADMM (Advection Diffusion Multilayer Method) and GILTT (Generalized Integral Laplace Transform Technique) techniques. Both approaches accept wind and eddy diffusion coefficients with any restriction in their height functions. Comparisons between values predicted by the models against experimental ground-level concentrations (from Copenhagen data set) are shown. The preliminary results confirm the applicability of the approaches proposed and are promising for future work.

关键词： Hazardous Emissions Advection-Diffusion Equation Analytical Solutions Air Pollution Modeling puff Models

Comparison between Non-Gaussian puff Model and a Model Based on a Time-Dependent Solution of Advection-Diffusion Equation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Protection 2010年第2期1卷 172-178页

作者： Tiziano Tirabassi Davidson M. Moreira Marco Tullio Vilhena Camila Pinto da Costa 不详

A comparison between a non-Gaussian puff model and an advanced time-dependent model to simulate the pollutant dispersion in the Planetary Boundary Layer is presented. The puff model is based on a general technique for solving the K-equation, using the truncated Gram-Charlier expansion (type A) of the concentration field and finite set equations for the corresponding moments. The other model (named ADMM: Analytical Dispersion Multilayers Model) is an semi- analytical solution to the time-dependent two-dimensional advection-diffusion equation based on a discretization of the PBL in N sub-layers;in each sub-layers the advection-diffusion equation is solved by the Laplace transform technique, considering an average value for eddy diffusivity and the wind speed. A preliminary performance evaluation is shown in the case of continuous emission from an elevated source in a variable boundary layer. Both models were able to correctly reproduce the concentration field measured and so to be used as operative air pollution models.

关键词： Advection-Diffusion Equation Air Pollution Modeling Analytical Solution puff Models

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

翻墙利器puff的使用方法

网友世界 2010年第6期 28-28页

作者： dwz

从Youtube到twitter,国外优秀的社交网站似乎都逃不过在国内被封的命运。因此能够提供网页代理访问服务的翻墙工具就越来越多的被我们使用了。

关键词：访问服务社交网站安装文件免费版 puff 英文界面不可用状态中文界面商业版 http

Development of Debris-free Laser Plasma Sources for EUV Lithography in CIOMP

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

光学精密工程 2001年第5期9卷 442-445页

作者： CHEN Bo, NI Qi liang,CAO Jian lin (State Key Laboratory of Applied Optics,Changchun Institute of Optics, Fine Mechanics and Physics,Chinese Academy of Sciences, Changchun 130022, China) 中科院长春光学精密机械与物理所应用光学国家重点实验室吉林长春 130022

We have been developing debris-free laser plasma sources for EUV lithography since 1996. Two types of debris-free sources, such as cryogenic target and gas-puff target laser plasma sources, were designed and built up ... 详细信息

关键词： EUV lithography laser plasma debris - free cryogenic target gas - puff target

维普期刊数据库

在线全文

学校读者我要写书评

暂无评论

应用吸收结构法预测火山灰云漂移轨迹

自然灾害学报 2015年第3期24卷 82-89页

作者：赵谊马宝君梁跃李太岩张明中国地震局地壳应力研究所北京100085 黑龙江省地震局黑龙江哈尔滨150090 牡丹江地震台黑龙江牡丹江157009 上海大学上海200433

火山灰云能对航空运输安全产生直接危害,所以对火山灰云轨迹进行预测是非常必要的。吸收结构法和puff模型都能依据数值天气预报的数据预测火山灰云飘移轨迹。应用这两种方法的原理,采用美国1958年至1997年的精确大气轨迹参数数据,计算... 详细信息

火山灰云能对航空运输安全产生直接危害,所以对火山灰云轨迹进行预测是非常必要的。吸收结构法和puff模型都能依据数值天气预报的数据预测火山灰云飘移轨迹。应用这两种方法的原理,采用美国1958年至1997年的精确大气轨迹参数数据,计算了风场的吸收结构,减化了计算过程,摆脱了对数值天气预报数据的依赖,实现了火山灰云漂移路径预测,并与吸收结构方法进行了比较。结果表明,应用风场计算的方法进行火山灰云追踪是可行的。

关键词：风场吸收结构 puff

维普期刊数据库