نتایج جستجو برای: structure borne noise

تعداد نتایج: 1769229  

2014
Michael CIK Peter LERCHER

For decades, urban noise and vibration studies were mostly concerned with road traffic and trains. Tramway noise was rarely studied. Since the introduction of new types of tramways in the city of Graz strong complaints were brought up by local residents in certain areas. Typically, the annoyance by tramways results from a complex combination of sounds and vibration exposure depending on ground ...

Journal: :IEEE Access 2023

Seed-borne diseases play a crucial role in affecting the overall quality of seeds, efficient disease management, and crop productivity agriculture. Detection seed-borne using machine learning (ML) deep (DL) can automate process at large-scale industrial applications for providing healthy high-quality seeds. ML-based methods are accurate detecting classifying fungal infection seeds; however, the...

Background:  High noises in the NICU are known to have negative effects on the health and wellness of hospitalized preterm infants. Various technologies for the care of preterm infants, extensive therapeutic interventions and communication between staff are among the causes of loud noise in these wards. The aim of this review article is to evaluate the effectiveness of noise reduction intervent...

A. Parsa, L. Shahryari , S.M. Tavakkoli,

In this article, the ant colony method is utilized for topology optimization of space structures. Strain energy of the structure is minimized while the material volume is limited to a certain amount. In other words, the stiffest possible structure is sought when certain given materials are used. In addition, a noise cleaning technique is addressed to prevent undesirable members in optimum topol...

Aerospace engines testing is a source of noise pollution and determining the low frequency acoustic characteristics of the test cell, plays an important role in optimally control of the sound field and reducing the level of sound pressure and pollution. In this study, the drop in average sound pressure level is numerically predicted by constructing a test cell according to ISO 140 standard. To ...

2008
P. Kindt

This paper presents a structural model for an unloaded tyre, based on a three-dimensional flexible ring on an elastic foundation. The ring represents the belt and the elastic foundation represents the tyre sidewall. The model is valid till 300 Hz and includes a model of the wheel and the air cavity. This makes the model suitable for the prediction of structure borne interior noise. Unlike most ...

2002
M Shimizu

Induction motors and the generators ofen have problems associated with noise and vibration. Consequently,there is need for prediction of noise and vibration during the design of these machines.The Finite Element Modeling(FEM) method is used for the prediction and evaluation of natural frequencies and mode shapes of electrical equipment.However, FEM is ofen very difficalt,becouse of the influenc...

Journal: :International Astronomical Union Colloquium 2000

2010
Evert Attema Ciro Cafforio Michael Gottwald Pietro Guccione Andrea Monti Guarnieri Paul Snoeij

 Abstract — The paper introduces a novel quantizer suited for medium to high resolution SAR systems, like the forthcoming SENTINEL-1 SAR. The Flexible Dynamic Block Adaptive Quantization (FDBAQ) extends the concept of the Block Adaptive Quantization (BAQ), used in space-borne SAR since the Magellan mission, by adaptively tuning the quantizer rate according to the local Signal-to-Noise-Ratio. A...

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