fungus
发表于 2025-3-21 18:15:43
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背景
发表于 2025-3-21 21:14:10
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alabaster
发表于 2025-3-22 01:28:00
Matania Ben-Artzi,Jonathan Nemirovsky Pettit 2014). These requirements, which may appear as airborne noise, underwater radiated noise, sonar self-noise, and/or vibration limits, are spelled out in ship specifications. They are becoming more prevalent as detrimental impacts from noise are receiving greater recognition. The impacts range
节省
发表于 2025-3-22 06:23:36
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针叶类的树
发表于 2025-3-22 09:57:18
Hitoshi Kitadaes using beamforming. Based on measurements with an array of microphones, while also measuring the position of the vehicle, the technique calculates the contribution of noise, and visualizes it as a contour plot on top of a picture of the train. Deconvolution is applied in addition to traditional be
持续
发表于 2025-3-22 13:42:34
Peter Kuchment,Boris Vainbergthe sleepers to the train external surfaces. In the 2.5D models, only the cross-section of the vehicle is created by using boundary elements, while the third direction is taken into account in terms of wavenumbers. After the sound pressure on the train cross-section is obtained, an inverse Fourier t
夸张
发表于 2025-3-22 20:58:32
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insert
发表于 2025-3-23 00:03:10
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流行
发表于 2025-3-23 04:49:35
A. G. Rammage sound level has generally been applied as the standard indicator. However, surveys show that the passengers’ satisfaction varies for different types of rolling stock, even though the sound level is comparable. In order to set consistent design targets, the challenge is to relate emotional and su
打谷工具
发表于 2025-3-23 06:25:50
Peter Rejto,Mario Taboadaod. The aim of analysing a large dataset is to derive statistically significant results on how angle of attack, speed, rail lubrication and rail grinding influence wheel squeal. The key finding is that the generation of severe wheel squeal is strongly determined by the angle of attack, which is cons