Now showing items 1-10 of 155
Modelos de volatilidade estatística
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-graduação em Estatística, 2008-08-22)
In the financial market usually notices are taken of the shares sequentially over the time in order to characterize them a time series. However, the major interest is to forecast the behavior of these shares. Motivated by ...
On the possibility of breaking the heterodyne detection quantum noise limit with cross-correlation
(Institute of Electrical and Electronics Engineers Inc., 2018)
The cross-correlation sensitivity of two identical balanced photodiode heterodyne receivers is characterized. Both the balanced photodiodes receive the same weak signal split up equally, a situation equivalent to an ...
Pitch detection algorithms based on zero-cross rate and autocorrelation function for musical notes
This paper discusses two pitch detection algorithms (PDA) for simple audio signals which are based on zero-cross rate (ZCR) and autocorrelation function (ACF). As it is well known, pitch detection methods based on ZCR and ...
Comparação entre qualidade de visão auto-relatada e acuidade visual em população idosa de baixa renda na cidade de São Paulo
(Conselho Brasileiro de Oftalmologia, 2006-02-01)
PURPOSE: Self-reported visual function questionnaires are becoming more common in clinical research. The purpose of this study is to evaluate and correlate self-reported visual function assessed by a visual function ...
Cholinergic autoantibodies from primary Sjögren’s syndrome inhibit mucin production via phospholipase c and cyclooxygenase-2 in the rat submandibular gland
(Isfahan Univ Med Sciences, 2011-03)
BACKGROUND: Patients with primary Sjögren's syndrome (pSS) produce functional IgG against cholinoreceptor of exocrine glands modifying their activity. The aim of the present work was to demonstrate pSS IgG antibodies (pSS ...