نتایج جستجو برای: noise performance

تعداد نتایج: 1201599  

2003
Pascal Berthou Thierry Gayraud Olivier Alphand C. Prudhommeaux Michel Diaz

Wireless networks have become increasingly popular for the past few years, especially IEEE 802.11 as the most widespread wireless technology. This article proposes a new architecture for broadband 802.11 networks to support distributed multimedia applications. After discussing the differences between multimedia and traditional applications, we show how the 802.11b mechanism ensuring enhanced ro...

Journal: :روش های عددی در مهندسی (استقلال) 0
مسعود سبحانی و احمدرضا تابش m. sobhani and a. a. tabesh

in this paper, a new algorithm for system identification based on frequency response is presented. in this method, given a set of magnitudes and phases of the system transfer function in a set of discrete frequencies, a system of linear equations is derived which has a unique and exact solution for the coefficients of the transfer function provided that the data is noise-free and the degrees of...

ژورنال: سلامت کار ایران 2014

  Background and aims : Among all systems that each person may interact with in daily life public transportation systems may expose them to various risks. The noise exposure of drivers can cause accidents through developing hearing loss and stress and consequent impact on driver’s safety performance. The main objective of this study was to evaluate the relation between noise exposure and occupa...

ژورنال: طب کار 2017
ابارشی, فاطمه, جلیلیان, حامد, خواجه وندی, علی اصغر, ذکایی, مجتبی, علیمحمدی, ایرج, فقیه نیا ترشیزی, یوسف, فلاحتی, محسن,

Introduction: driving is such a complex cognitive task that requires a high level of vigilance and response to an emergency. Anything that leads to cognitive performance degradation in the driver's mental processing, increases crash risks. Traffic noise as one of the most destructive elements of cognitive function was examined in this study. Methods: In this study, the sample consisted of 80...

ژورنال: سلامت کار ایران 2016

Background and aims: Noise is one of the troubles in industrial world and numerous people are affected by it. Sleep disturbance is a harmful effect of exposure to noise. High quality of sleep is an important factor in health and well-being so its decline can threaten persons’ health and even their safety. The current study was conducted to assess the relationship between exposure to noise...

Many algorithms in machine learning, pattern recognition, and data mining are based on a similarity/distance measure. For example, the kNN classifier and clustering algorithms such as k-means require a similarity/distance function. Also, in Content-Based Information Retrieval (CBIR) systems, we need to rank the retrieved objects based on the similarity to the query. As generic measures such as ...

Journal: :IEEE Transactions on Signal Processing 2010

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