搜索结果: 1-15 共查到“理学 avalanche”相关记录27条 . 查询时间(0.136 秒)
Resilience of gated avalanche photodiodes against bright illumination attacks in quantum cryptography
quantum cryptography gated avalanche photodiodes
2011/9/13
Semiconductor avalanche photodiodes (APDs) are commonly used for single photon detection in quantum key distribution. Recently, many attacks using bright illumination have been proposed to manipulate ...
Ionisation in atmospheres of Brown Dwarfs and extrasolar planets I The role of electron avalanche
Brown Dwarfs extrasolar planets
2011/1/10
Brown Dwarf and extrasolar planet atmospheres form clouds which strongly influence the local chemistry and physics. These clouds are globally neutral obeying dust-gas charge equilibrium which is, on s...
Discrimination of hot versus cold avalanche deposits: Implications for hazard assessment at Mount Meager, B.C.
hot versus cold avalanche deposits hazard assessment Mount Meager, B.C.
2009/12/10
The surficial deposits surrounding the Mount Meager volcanic complex include numerous avalanche deposits. These deposits share many attributes: (a) they are nearly monolithologic and comprise mainly i...
Nearest neighbour models for local and regional avalanche forecasting
Nearest neighbour models local and regional avalanche forecasting
2009/12/9
This paper presents two avalanche forecasting applications NXD2000 and NXD-REG which were developed at the Swiss Federal Institute for Snow and Avalanche Re-search (SLF). Even both are based on the ne...
A new method for avalanche hazard mapping using a combination of statistical and deterministic models
avalanche hazard mapping statistical and deterministic models
2009/12/9
The purpose of the present paper is to propose a new method for avalanche hazard mapping using a combination of statistical and deterministic modelling tools. The methodology is based on frequency-wei...
The calibration of an avalanche mathematical model using field data
The calibration an avalanche mathematical model field data
2009/12/9
The experience of calibrating Eglit’s avalanche model using data about the avalanche travel distance lengths and velocity data from the Zailiyskiy Alatau range (Kazakhstan) is discussed. Empirical equ...
Recalculation of an artificially released avalanche with SAMOS and validation with measurements from a pulsed Doppler radar
an artificially released avalanche SAMOS a pulsed Doppler radar
2009/12/9
A joint experiment was carried out on 10 February 1999 by the Swiss Federal Institute for Snow and Avalanche Research (SFISAR) and the Austrian Institute for Avalanche and Torrent Research (AIATR, of ...
Observations and modelling of snow avalanche entrainment
snow avalanche entrainment avalanche events
2009/12/9
In this paper full scale avalanche dynamics measurements from the Italian Pizzac and Swiss Vallée de la Sionne test sites are used to develop a snowcover entrainment model. A detailed analysis of thre...
Possible deviations from Griffith’s criterion in shallow slabs, and consequences on slab avalanche release
Griffith’s criterion shallow slabs slab avalanche release
2009/12/9
Possible reasons for deviations from Griffith’s criterion in slab avalanche triggerings are examined. In the case of a major basal crack, we show (i) that the usual form of Griffith’s criterion is val...
Snow drift: acoustic sensors for avalanche warning and research
Snow drift acoustic sensors avalanche warning
2009/12/9
Based on wind tunnel measurements at the CSTB (Jules Verne) facility in Nantes and based on field observations at the SLF experimental site Versuchsfeld Weissfluhjoch, two acoustic wind drift sensors ...
The installation of the BESⅢ RPC system has been completed. Cosmic ray test results show that they perform very well in streamer mode and meet the BESⅢ requirements. We have tested several RPCs in the...
Regional evaluation of three day snow depth for avalanche hazard mapping in Switzerland
Regional evaluation hazard mapping Switzerland
2009/12/30
The distribution of the maximum annual three day snow fall depth H72, used for avalanche hazard mapping according to the Swiss procedure (Sp), is investigated for a network of 124 stations in the Alpi...
Application of a regional approach for hazard mapping at an avalanche site in northern Italy
Application regional approach hazard mapping avalanche site northern Italy
2010/1/27
The currently adopted approach to avalanche hazard mapping in northern Italy includes avalanche dynamic modelling, coupled with statistical analysis of snow depth at avalanche start. The 30-years and ...
Characterization of a rock avalanche deposit for risk assessment in the town of Celano (Fucino Basin,Central Italy)
Characterization rock avalanche deposit risk assessment Celano
2010/1/27
This paper describes multidisciplinary investigations carried out in the urban centre of Celano, a small town located at the northern edge of the Fucino Basin (Central Italy). The town lies upon a wid...
Different Avalanche Behaviors in Different Specific Areas of a
System Based on Neural Networks
self-organized criticality avalanche neuron networks
2007/8/15
2003Vol.40No.3pp.363-368DOI:
Different Avalanche Behaviors in Different Specific Areas of a
System Based on Neural Networks
ZHAO Xiao-Wei and CHEN Tian-Lun
Department o...