نتایج جستجو برای: noise function

تعداد نتایج: 1380816  

1999
Xinchuan Zeng Tony R. Martinez

This paper shows that the performance of the Hoppeld network for solving optimization problems can be improved by using a new activation (output) function. The eeects of the activation function on the performance of the Hoppeld network are analyzed. It is shown that the sigmoid activation function in the Hoppeld network is sensitive to noise of neurons. The reason is that the sigmoid function i...

Journal: :مجله انسان، محیط زیست و ارتقاء سلامت 0
faramarz majidi parvin etesami ave. zanjan, iran nahid rezai parvin etesami ave. zanjan, iran

background; noise mapping in industry can be useful to assess the risks of harmful noise, or to monitor noise in machine rooms. using gis -based software for plot of noise maps in an indoor noisy work environment can be helpful for occupational hygienists to monitor noise pollution. methods; this study was carried out in noisy packaging unit of a food industry in ghazvin industrial zone, to eva...

Journal: :international journal of occupational hygiene 0
ali asghar alesheikh faculty of geomatics engineering, k. n. toosi university of technology, vali-e-asr st., mirdamad cross, tehran, iran manouchehr omidvari faculty of industrial and mechanical engineering, islamic azad university, qazvin branch, qazvin, iran

large urban areas are facing growing problems of noise pollutions. geospatial information systems (gis) can conveniently be adapted to gather, analyze and present noise information. gis can also be extended to answer to user specific problems through deterministic and statistics models. the objectives of this research were to measure urban traffic noise levels, analyze temporal and spatial dyna...

Journal: :iranian journal of medical physics 0
a. sazgarnia assistant professor, medical physics research center, bu-ali research institute, mashhad university of medical sciences, mashhad, iran. m. h. bahreyni toossi professor, medical physics research center, bu-ali research institute, mashhad university of medical sciences, mashhad, iran. h. moradi m. sc. in in medical physics, mashhad university of medical sciences, mashhad, iran.

introduction: among the environmental pollutions, noise is very important for its physiological  and psychological effects on human. traffic noise is one of the most important pollutants and the  hospitals  are  one  of  the  critical  places  regarding  this  type  of  noise.  for  these  reasons,  in  the  summer  of  1382,  the  traffic  noise  of  mashhad  main  streets  around  the  hospit...

2012

Phase locked loops for data links operating at 10 Gb/s or faster are low phase noise devices designed to operate with a low jitter reference clock. Characterization of their jitter transfer function is difficult because the intrinsic noise of the device is comparable to the random noise level in the reference clock signal. A linear model is proposed to account for the intrinsic noise of a PLL. ...

2004
Agamirza E. Bashirov

The suggested open problem concerns the error of estimation and the minimum of the cost in the filtering and optimal control problems for a partially observable linear system corrupted by wide band noise processes. Recent results allow to construct a wide band noise process in a certain integral form on the basis of its autocovariance function and design the optimal filter and the optimal contr...

In this paper, a new unsupervised algorithm for automatic retinal blood vessel extraction is presented. A pre-processing step is introduced to eliminating optic disk and back ground noise. Blood vessel highlighting is prepared by a new method inspired by simple cells in human visual system. An adaptive threshold is introduced as an activation function of simple cells. Post-processing step is us...

  In this paper, we propose a nonparametric rank-based alternative to the least-squares independent component analysis algorithm developed. The basic idea is to estimate the squared-loss mutual information, which used as the objective function of the algorithm, based on its copula density version. Therefore, no marginal densities have to be estimated. We provide empirical evaluation of th...

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