نتایج جستجو برای: cyclone samplers

تعداد نتایج: 7849  

Journal: :Engineering Letters 2009
I. Mokni Hatem Dhaouadi Hatem Mhiri Georges Le Palec

A numerical analysis of the turbulent and strongly swirling flow field of a uniflow cyclone and its performances is described. The gas flow is obtained by the use of the Reynolds stress model while, the determination of particle flow is ensured by the use of a Stochastic Lagrangian model. The flow features are examined in terms of tangential, axial and radial velocities, pressure drop and separ...

2000
Frederick Smith Dan Grossman Greg Morrisett Luke Hornof Trevor Jim

Cyclone is a programming language that provides explicit support for dynamic specialization based on runtime code generation. To generate specialized code quickly, our Cyclone compiler uses a template based strategy in which pre-compiled code fragments are stitched together at runtime. To achieve good performance, the pre-compiled fragments must be optimized. This paper describes a principled a...

2003
Michael Hicks Greg Morrisett Dan Grossman Trevor Jim

Cyclone is a type-safe programming language intended for applications requiring control over memory management. Our previous work on Cyclone included support for stack allocation, lexical region allocation, and a garbage-collected heap. We achieved safety (i.e., prevented dangling pointers) through a region-based type-and-effects system. This paper describes some new memory-management mechanism...

2006
Patrick A. Harr

In this section, summaries of recent progress in observations, forecasting, and research of tropical cyclone formation and extratropical transition are provided. Furthermore, requirements that remain for advancements in these topics are identified. During the period since IWTC-V, there have been improvements in observational capability, new research results into important physical processes, an...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Aslak Grinsted John C Moore Svetlana Jevrejeva

Detection and attribution of past changes in cyclone activity are hampered by biased cyclone records due to changes in observational capabilities. Here we construct an independent record of Atlantic tropical cyclone activity on the basis of storm surge statistics from tide gauges. We demonstrate that the major events in our surge index record can be attributed to landfalling tropical cyclones; ...

Journal: :Eastern Mediterranean health journal = La revue de sante de la Mediterranee orientale = al-Majallah al-sihhiyah li-sharq al-mutawassit 2012
F Panahi R Asadollahi M Asadollahi A Hasani-Bafarani

Gonu, the second tropical cyclone of the 2007 northern Indian ocean cyclone season, affected Oman, Pakistan, the United Arab Emirates and the Islamic Republic of Iran. This report examines the effects of cyclone Gonu in the Islamic Republic of Iran where it approached on its path on 6 June 2007 and reviews the actions taken before, during and after the cyclone. The incident highlighted the need...

2004
Zuohao CAO Da-Lin ZHANG

Surface cyclone tracks are investigated in the context of moist potential vorticity (MPV). A prognostic equation of surface absolute vorticity is derived which provides a basis for using negative MPV (NMPV) in the troposphere as an alternative approach to track surface cyclones. An observed case study of explosive lee cyclogenesis is performed to test the effectiveness of the MPV approach. It i...

2016
Benjamin Bloem-Reddy John Cunningham

Hamiltonian Monte Carlo and slice sampling are amongst the most widely used and studied classes of Markov Chain Monte Carlo samplers. We connect these two methods and present Hamiltonian slice sampling, which allows slice sampling to be carried out along Hamiltonian trajectories, or transformations thereof. Hamiltonian slice sampling clarifies a class of model priors that induce closed-form sli...

ژورنال: سلامت و محیط زیست 2013
امجد سردرودی, حسین, بهرامی, عبدالرحمن, فردمال, جواد, قربانی شهنا, فرشید,

Background and Objectives: Cyclone is one of the most utilized dust collectors for airborne particles control. It separates particles from airflow by centrifugal force. However, it is not effective in collecting very fine particles smaller than 10 μm in diameter. The aim of this study was to assess the performance of charging particles on cyclone efficiency in collecting particles smaller than ...

Journal: :The Annals of occupational hygiene 2008
Eddy Langlois

Passive sampling is an approved and accurate method for the assessment of organic compound exposure over long sampling time. This method could be very convenient for the short-time exposure assessment, but passive samplers have to be validated for this use. In this article, the behaviour of two commercial passive samplers (GABIE and Perkin Elmer) under fluctuant concentration conditions is stud...

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