نتایج جستجو برای: noise disturbance

تعداد نتایج: 237210  

Journal: :Ergonomics 2016
Pyoung Jik Lee Byung Kwon Lee Jin Yong Jeon Mei Zhang Jian Kang

UNLABELLED This study uses a structural equation model to examine the effects of noise on self-rated job satisfaction and health in open-plan offices. A total of 334 employees from six open-plan offices in China and Korea completed a questionnaire survey. The questionnaire included questions assessing noise disturbances and speech privacy, as well as job satisfaction and health. The results ind...

2008
Constantine Caramanis Shie Mannor

We study distribution-dependent, data-dependent, learning in the limit with adversarial disturbance. We consider an optimization-based approach to learning binary classifiers from data under worst-case assumptions on the disturbance. The learning process is modeled as a decision-maker who seeks to minimize generalization error, given access only to possibly maliciously corrupted data. Two model...

2010
Daniel Shepherd David Welch Kim N. Dirks Renata Mathews

The relationship between environmental noise and health is poorly understood but of fundamental importance to public health. This study estimated the relationship between noise sensitivity, noise annoyance and health-related quality of life in a sample of adults residing close to the Auckland International Airport, New Zealand. A small sample (n = 105) completed surveys measuring noise sensitiv...

2007
Bert Stallaert Steven Devos Gregory Pinte Wim Symens Jan Swevers Paul Sas

This work covers the design of active structural acoustic source controllers, where the aim is to reduce radiated noise by placing actuators as close as possible to the disturbance source, in order to intervene as early as possible in the transfer path between disturbance and noise radiators. The considered application is rotating machinery, where the noise is periodic with a fundamental freque...

2009
Murali R. Rajamani James B. Rawlings

Integrated white noise disturbance models are included in advanced control strategies, such as Model Predictive Control, to remove offset when there are unmodeled disturbances or plant/model mismatch. These integrating disturbances are usually modeled to enter either through the plant inputs or the plant outputs or partially through both. There is currently a lack of consensus in the literature...

Journal: :IEEE Trans. Automat. Contr. 2001
Hua Deng Miroslav Krstic Ruth J. Williams

This paper poses and solves a new problem of stochastic (nonlinear) disturbance attenuation where the task is to make the system solution bounded (in expectation, with appropriate nonlinear weighting) by a monotone function of the supremum of the covariance of the noise. This is a natural stochastic counterpart of the problem of input-to-state stabilization in the sense of Sontag. Our developme...

Journal: :Environment international 2016
Jeppe Schultz Christensen Dorrit Hjortebjerg Ole Raaschou-Nielsen Matthias Ketzel Thorkild I A Sørensen Mette Sørensen

BACKGROUND Exposure to road traffic noise has been associated with adiposity and diabetes in adults. The suggested pathways have been through sleep disturbance and stress. Children may be particularly susceptible to noise induced sleep disturbance and stress and the effects hereof. OBJECTIVES To examine the association between traffic noise exposure during pregnancy and early childhood and ad...

Journal: :Environment international 2015
Igho J Onakpoya Jack O'Sullivan Matthew J Thompson Carl J Heneghan

Noise generated by wind turbines has been reported to affect sleep and quality of life (QOL), but the relationship is unclear. Our objective was to explore the association between wind turbine noise, sleep disturbance and quality of life, using data from published observational studies. We searched Medline, Embase, Global Health and Google Scholar databases. No language restrictions were impose...

2014
Mehrshad Salmasi Homayoun Mahdavi-Nasab

Active Noise Control (ANC) works on the principle of destructive interference between the primary disturbance field heard as undesired noise and the secondary field which is generated from control actuators. In the simplest system, the disturbance field can be a simple sine wave, and the secondary field is the same sine wave but 180 degrees out of phase. This research presents an investigation ...

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