Falling Snow Optical Modeling PDF Download
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Author: Manuel Martinez-Sanchez
Publisher:
ISBN:
Category : Snow
Languages : en
Pages : 65
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Book Description
In order to develop a model describing the adverse weather effects of snow on optical transmission, it is necessary to incorporate optical, physical, and meteorological characteristics. We report on the development of a model which incorporates these three aspects of snow characterization. We first discuss a numerical model aimed at obtaining an understanding of the meteorological aspects of snowfall. Specifically, the model accepts as inputs such measurable quantities as temperature and dew point vertical profiles, as well as other quantities, often not measured, such as updraft velocity, cloud droplet size, and ice nucleus concentration. Based on these data, the model then predicts the time evolution of the cloud, and, eventually, the rate of precipitation and the type of snow particles arriving at the ground. We also discuss optical considerations in order to provide a framework in which physical and meteorological aspects can be included. Specifially, we discuss the need for areal, volume, and settling velocity parameters in calculating optical extinction coefficients. (Author).
Author: Manuel Martinez-Sanchez
Publisher:
ISBN:
Category : Snow
Languages : en
Pages : 65
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Book Description
In order to develop a model describing the adverse weather effects of snow on optical transmission, it is necessary to incorporate optical, physical, and meteorological characteristics. We report on the development of a model which incorporates these three aspects of snow characterization. We first discuss a numerical model aimed at obtaining an understanding of the meteorological aspects of snowfall. Specifically, the model accepts as inputs such measurable quantities as temperature and dew point vertical profiles, as well as other quantities, often not measured, such as updraft velocity, cloud droplet size, and ice nucleus concentration. Based on these data, the model then predicts the time evolution of the cloud, and, eventually, the rate of precipitation and the type of snow particles arriving at the ground. We also discuss optical considerations in order to provide a framework in which physical and meteorological aspects can be included. Specifially, we discuss the need for areal, volume, and settling velocity parameters in calculating optical extinction coefficients. (Author).
Author: V. Yousefian
Publisher:
ISBN:
Category : Snow
Languages : en
Pages : 26
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Book Description
Author: V. Yousefian
Publisher:
ISBN:
Category : Snow
Languages : en
Pages : 28
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1016
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Book Description
Author: Gary Koh
Publisher:
ISBN:
Category : Snow
Languages : en
Pages : 22
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1148
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Book Description
Author: Heinrich H. Bülthoff
Publisher: Springer
ISBN: 3540361812
Category : Computers
Languages : en
Pages : 676
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Book Description
This book constitutes the refereed proceedings of the Second International Workshop on Biologically Motivated Computer Vision, BMCV 2002, held in Tübingen, Germany, in November 2002. The 22 revised full papers and 37 revised short papers presented together with 6 invited papers were carefully reviewed and selected from 97 submissions. The papers are organized in topical sections on neurons and features, motion, mid-level vision, recognition - from scenes to neurons, attention, robotics, and cognitive vision.
Author: Lawrence C. Gibbons
Publisher:
ISBN:
Category : Meteorological instruments
Languages : en
Pages : 38
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Book Description
This report details the design, fabrication, and operation of three new instruments that were developed at AFGL to define some of the physical characteristics of naturally falling snow. Two are devices for the measurement of fall velocity and high-resolution snow rate. The other was conceived for the documentation of the ice-crystal composition of the prevailing snow. Problems that surfaced during the first year of operation are discussed along with the plans to correct the deficiencies. Examples of the data supplied by these instruments are shown. (Author).
Author: Paul G. Constantine
Publisher: SIAM
ISBN: 1611973864
Category : Computers
Languages : en
Pages : 105
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Book Description
Scientists and engineers use computer simulations to study relationships between a model's input parameters and its outputs. However, thorough parameter studies are challenging, if not impossible, when the simulation is expensive and the model has several inputs. To enable studies in these instances, the engineer may attempt to reduce the dimension of the model's input parameter space. Active subspaces are an emerging set of dimension reduction tools that identify important directions in the parameter space. This book describes techniques for discovering a model's active subspace and proposes methods for exploiting the reduced dimension to enable otherwise infeasible parameter studies. Readers will find new ideas for dimension reduction, easy-to-implement algorithms, and several examples of active subspaces in action.
Author:
Publisher:
ISBN:
Category : Optical instruments
Languages : en
Pages : 804
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Book Description
Publishes papers reporting on research and development in optical science and engineering and the practical applications of known optical science, engineering, and technology.
