Галерея 3293669
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1 Laboratory of Theoretical and Physical Biology, National Institute of Child Health and Human Development, Bethesda, Maryland 20892.
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A thermospray high-performance liquid chromatography/mass spectrometry method for the separation and quantification of cortisol in human serum has been developed. The technique does not require derivatization, allows for both qualitative and quantitative determinations, provides increased specificity not available from conventional high-performance liquid chromatography, and has a detection limit of 5 pmol on-column. This isotope dilution mass spectrometry method, using d3-cortisol as an internal standard, allows precise determinations even at low isotopic ratios (2%-5 mole%). Evidence that this technique can be applied to the quantification of serum cortisol and to the determination of daily cortisol production in humans is presented.
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Virtual Reality Oriented Modeling and Simulation of Water-dropping From Helicopter
Published: 23 November 2018 Publication History
AIVR 2018: Proceedings of the 2018 International Conference on Artificial Intelligence and Virtual Reality
In-Cooperation University of Tsukuba: University of Tsukuba
Qualifiers research-article Research Refereed limited
A.C. Scott, Bowman DMJS, W.J. Bond, S.J. Pyne, M.E. Alexander, Fire on Earth: Introduction, Wiley-Blackwell, Chichester, England, 2014. Google Scholar Robins, Mark. Fighting the Helicopters and the equipment they support are an invaluable component to aerial firefighting{J}. Rotor & Wing, 2013, 47(6). Google Scholar Enrico Marchi, Enrico Tesi, Niccolò Brachetti Montorselli, Francesco Neri. Helicopter activity in forest firefighting: A data analysis proposal{J}. Forest Ecology and Management, 2006, 234. Google Scholar Chen J, Liu H, Sun X, et al. Effectiveness evaluation for single helicopter forest fire-fighting training based on ANP{J}. Journal of Beijing University of Aeronautics & Astronautics, 2017, 43(4):782--789. Google Scholar Konishi T, Kikugawa H, Iwata Y, et al. Aerial firefighting against urban fire: Mock-up house experiments of fire suppression by helicopters{J}. Fire Safety Journal, 2008, 43(5):363--375. Google Scholar Cross Ref Dudley M, Greenhoe G S. Fifty years of helicopter firefighting{J}. Fire Management Notes, 1998. Google Scholar Freund E, Rossmann J, Bucken A. Fire training in a virtual-reality environment{C}// Stereoscopic Displays and Virtual Reality Systems XII. International Society for Optics and Photonics, 2005:388--394. Google Scholar Fu L. Application of virtual reality technology in simulation experiments of fire-fighting and rescue{J}. Experimental Technology & Management, 2015. Google Scholar Kinateder M, Ronchi E, Nilsson D, et al. Virtual reality for fire evacuation research{C}// Computer Science and Information Systems. IEEE, 2014:313--321. Google Scholar Liu Y, Yang H. Study on Virtual Reality System for Mine Fire Emergency Rescue Training{J}. Mining Safety & Environmental Protection, 2013. Google Scholar Cha M, Han S, Lee J, et al. A virtual reality based fire training simulator integrated with fire dynamics data {J}. Fire Safety Journal, 2012, 50(3):12--24. Google Scholar Cross Ref Amorim J H. Numerical modelling of the aerial drop of firefighting agents by fixed-wing aircraft. Part I: model development{J}. International Journal of Wildland Fire, 2011, 20(20):384--393. Google Scholar Cross Ref Amorim J H. Numerical modelling of the aerial drop of firefighting agents by fixed-wing aircraft - Part II: Model validation{J}. International Journal of Wildland Fire, 2011, 20(20):394--406. Google Scholar Cross Ref G. Grant, J. Brenton, D. Drysdale, Fire suppression by water sprays, Prog. Energy Combust. Sci. 26 (2000) 79--130. Google Scholar Cross Ref Lv H X, Wu C L, Xiong Y Z, Li Y N. Numerical Modeling on Rain Drops Falling Velocity{J}. Journal of Soil and Water Conservation, 1997 (02):14--21. Google Scholar Modern Hydraulics III Mechanics of turbulence{M}. Beijing: Higher Education Press, 1992. Google Scholar Zhou L. Recent Development in Modeling Theory for Turbulent Gas-Particle Flows{J}. Journal of Combustionence & Technology, 1995. Google Scholar Dominique Legendre. Air tanker drop patterns. International Journal of Wildland Fire, January 2014. Google Scholar Wang H, Lei H, Yang J. Microphysical processes of a stratiform precipitation event over eastern China: analysis using micro rain radar data{J}. Advances in Atmospheric Sciences, 2017, 34(12):1472--1482. Google Scholar Cross Ref Sun X J, Sun H Y, Jiang Z D. Numerical Simulation of Terminal Velocity of Raindrops Falling under Different Atmospheric Conditions{J}. Computer Simulation, 2011, 28(12):402--406 Google Scholar
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Fire-fight helicopter is the core of forest aviation firefighting. Using virtual reality technology to train the crew of helicopter can improve their skill to put out fire efficiently and reduce property loss. However, current methods of visualizing water-dropping of helicopter in virtual environment cannot simultaneously ensure real-time performance and accuracy. On the one hand, the existing visualization methods, which have been widely used, are often just visual imitations and cannot reflect the physical laws of water-dropping. On the other hand, complex computations are required for the general fluid modeling method, which cannot meet the requirement of real-time response in a VR system. It is of great significance to establish a simulation-oriented model of water-dropping from helicopter for achieving realistic water visualization and further increasing the fidelity and immersion of the virtual environment.
In this paper, we demonstrate an effective approach to establish a water-dropping model of helicopter and visualize it in a VR system, simulating physical laws and virtual effects at the same time.
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