منابع مشابه
Multidimensional evaluation of soil pollution from railway tracks
Railway transport is a source of pollution to soils and living organisms by e.g. PAHs, PCBs, oil-derived products, pesticides and heavy metals. Soil toxicity evaluation requires chemical analyses, indicating the type and content of particular pollutants, as well as biological analyses, which allow assessing the reaction of organisms to these pollutants. This paper is focused on a multi-aspect e...
متن کاملPerceptual constancy in auditory perception of distance to railway tracks.
Distance to a sound source can be accurately estimated solely from auditory information. With a sound source such as a train that is passing by at a relatively large distance, the most important auditory information for the listener for estimating its distance consists of the intensity of the sound, spectral changes in the sound caused by air absorption, and the motion-induced rate of change of...
متن کاملExperimental and numerical determination of transfer functions along railway tracks
Ground borne vibration in buildings due to railway traffic is a major concern in densely built up areas. In practice, railway induced vibration is often predicted by means of empirical methods such as the Detailed Vibration Assessment developed by the U.S. Federal Railroad Administration (FRA). The vibration velocity level in the free field is predicted based on a separate characterization of t...
متن کاملA Novel Algorithm for Railway Tracks Detection using Satellite Imagery
Image processing applications have their wide ranged importance in today's world. Railway track detection is one of the hot research areas in visioning systems. An efficient algorithm and high quality images of railway tracks are required for accomplishing the desired task. Images produced by Google maps and Google earth are generally not so extraordinary. Their degraded quality affects th...
متن کاملAcceleration-Based Quality Assessment of Railway Tracks using a 2D simulation model and recorded track data
Car body acceleration is an important factor affecting track safety and ride comfort, which are two primary aspects of railway systems. Though track level is an important source of wagon body acceleration, no quantitative relation between them is available and the aim of this paper is to propose a method to address this issue. To do so, car body acceleration is determined using a 10 DOF simulat...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1876
ISSN: 0036-8733
DOI: 10.1038/scientificamerican11111876-731asupp