搜索结果: 1-15 共查到“知识库 工学 collision”相关记录26条 . 查询时间(0.187 秒)
UAV POSITIONING AND COLLISION AVOIDANCE BASED ON RSS MEASUREMENTS
UAV Positioning Collision avoidance RPAS Statistical filtering
2015/9/10
In recent years, Unmanned Aerial Vehicles (UAVs) are attracting more and more attention in both the research and industrial communities: indeed, the possibility to use them in a wide range of remote s...
On the impossibility of efficiently combining collision resistant hash functions
resistant hash functions efficiently combining
2015/8/5
Let H1, H2 be two hash functions. We wish to construct a new hash function H that is collision resistant if at least one of H1 or H2 is collision resistant. Concatenating the output of H1 and H2 clear...
Assessment of the Probability of a Midair Collision During an Ultra Closely Spaced Parallel Approach
Midair Collision Closely Spaced Parallel Approach
2015/6/29
In this era of increasing delays in air travel, all means of increasing the capacity of both airports and airspace are receiving intense consideration. In anticipation of future high precision guidanc...
The physical and mathematical foundations of the Oriented-Eddy Collision turbulence mo del are provided through a discussion of the Reynolds averaged NavierStokes (RANS) equations, probability density...
Development of an Oriented-Eddy Collision Model for Turbulence
Oriented-Eddy Collision Model Turbulence
2014/10/23
The exact governing equations of fluid dynamics are too computationally expensive to solve on a computer for practical applications. Hence, it is currently not possible to analytically describe the be...
Efficient point cloud collision detection and analysis in a tunnel environment using kinematic laser scanning and K-D Tree search
Collision Detection K-D Tree Kinematic Laser Scanning 3D Point Clouds
2014/9/9
Measuring the structure gauge of tunnels and other narrow passages has so far been the only way to evaluate whether large vehicles can pass through them. But especially for very long vehicles like tra...
Influences of variables on ship collision probability in a Bayesian belief network model
Maritime accidents Bayesian networks Sensitivity analysis Mutual information Causation probability
2012/4/15
The influences of the variables in a Bayesian belief network model for estimating the role of human factors on ship collision probability in the Gulf of Finland are studied for discovering the variabl...
Crash and burn Vehicle, collision, and driver factors that influence motor vehicle collision fires
Fire Semi trucks Injury Passenger vehicles Pickup trucks
2012/4/26
A retrospective population-based case–control study was performed to determine the association between vehicle fires, and vehicle, collision, and driver factors on highways with a posted speed limit o...
The Collision Security of Tandem-DM in the Ideal Cipher Model
Collision Security Tandem-DM Cipher Model
2012/12/3
We prove that Tandem-DM, which is one of the two “classical” schemes for turning a blockcipher of 2n-bit key into a double block length hash function, has birthday-type collision resistance in the ide...
A simple particle model for a system of coupled equations with absorbing collision term
Interacting particle systems large numbers limit absorption
2011/10/10
Abstract: We study a particle model for a simple system of partial differential equations describing, in dimension $d\geq 2$, a two component mixture where light particles move in a medium of absorbin...
燃油粘度与环境压力对喷雾碰撞过程的影响（Investigation of the Influences of Droplet Viscosity and Environmental Pressure on the Spray Collision）
内燃机 喷雾模拟 碰撞模型
2010/12/28
O’Rourke碰撞模型仅仅考虑了碰撞拉伸分离以及聚合，而忽略了碰撞反弹、反射分离以及高韦伯数下的碰撞二次破碎过程，在碰撞分区过程中也忽略了燃油物性以及碰撞环境条件的影响，使得预测的碰撞分区临界韦伯数偏低。复合碰撞模型根据相关的实验结果对碰撞分区进行油滴粘度以及碰撞环境压力修正，考虑碰撞反弹、反射分离、拉伸分离以及碰撞二次破碎过程，提高了碰撞分区的预测精度。基于复合碰撞模型，分析了油滴粘度与环境压...
Investigating traffic accidents: a collision of two motor vehicles
road traffic traffic accident traffic safety motor vehicle collision simulation PC-CRASH
2010/10/29
Traffic safety may be ensured by normal operation of all elements of the system, including the driver, a motor vehicle and transportation medium. Insufficient safety of some particular elements of thi...
Trends in Transit Bus Accidents and Promising Collision Countermeasures
Trends in Transit Bus Accidents and Promising Collision Countermeasures
2009/10/16
This article presents information on bus collisions from the National Transit Database
(NTD) and discusses implications of the findings on the design of transit collision
warning systems. A total of...
Photonic Balancing in DPSK Detection Using Pulse Collision in a Semiconductor Optical Amplifier
Photonic Balancing DPSK Detection Pulse Collision Semiconductor Optical Amplifier
2015/7/14
We present a new DPSK receiver scheme where counter-propagating pulses collide in a saturated semiconductor optical amplifier, realizing photonically balanced single-ended detection. Decreased fluctua...
Collision Avoidance Sensor System with Beam Width Selection Method
Beam width selection method Safety device Collision avoidance sensor
2009/6/12
A safety area sensor for automatic guided vehicles using a semiconductor laser and a CCD camera has been studied. But this detection system, which depends on the light intensity, has the weak point fo...