نتایج جستجو برای: detection of noisy frequencies

تعداد نتایج: 21218110  

Journal: :Pollack Periodica 2021

Abstract Visual identification of objects is an important challenge today. Main target frequently applied methods to identify or classify complex objects. These are far less effective when small and complex, thus descriptor features on hand. The main reason for this that these can significantly change object occlusion appearance noise. presented solution performs simple, (size 17 × 13 pixels) w...

2017
Rosane Ushirobira Wilfrid Perruquetti Mamadou Mboup

In this paper, a novel algebraic method is proposed to estimate amplitudes, frequencies and phases of a biased and noisy sum of complex exponential sinusoidal signals. The resulting parameter estimates are given by original closed formulas, constructed as integrals acting as time-varying filters of the noisy measured signal. The proposed algebraic method provides faster and more robust results,...

Journal: :iranian journal of medical sciences 0
a. zahedmehr department of biotechnology, pas-teur institute of iran, tehran, iran s. delmaghani department of biotechnology, pas-teur institute of iran, tehran, iran r. sharifian hemophilia centre, imam khomeini hospital, tehran university of medical sciences, tehran, iran m. lak hemophilia centre, imam khomeini hospital, tehran university of medical sciences, tehran, iran s. zeinali department of biotechnology, pas-teur institute of iran, tehran, iran

background: hemophilia b is an x-linked recessive coagulation disorder caused by factor ix deficiency.  analysis of factor ix gene polymorphisms is considered the best approach for prenatal diagnosis and carrier detection of hemophilia b where the identification of gene mutation is not easily possible.   objective: to study the frequency of three factor ix-linked restriction fragment length pol...

2002
János Demetrovics Gyula O. H. Katona Dezsö Miklós

A relational database D is given with Ω as the set of attributes. The rows (tuples, data of one individual) are transmitted through a noisy channel. It is supposed that at most one data in a row can be changed by the transmission. We say that A → b (A ⊂ Ω, b ∈ Ω) is an error-correcting functional dependency if the data in A uniquely determine the data in b in spite of the error. We investigate ...

2011
Roger Levy

A system making optimal use of available information in incremental language comprehension might be expected to use linguistic knowledge together with current input to revise beliefs about previous input. Under some circumstances, such an error-correction capability might induce comprehenders to adopt grammatical analyses that are inconsistent with the true input. Here we present a formal model...

Abstract Purpose: Errors in data collection and failure to pay attention to data that are noisy in the collection process for any reason cause problems in data-based analysis and, as a result, wrong decision-making. Therefore, solving the problem of missing or noisy data before processing and analysis is of vital importance in analytical systems. The purpose of this paper is to provide a metho...

1998
Lamia Karray Jean Monné

Recognition performance decreases when recognition systems are used over the telephone network, especially wireless network and noisy environments. It appears that non efficient speech/non-speech detection is a very important source of this degradation. Therefore, speech detector robustness to noise is a challenging problem to be examined, in order to improve recognition performance for the ver...

2001
LORI WOLLERMAN

Many animals communicate in environments with high levels of background noise. Although it is a fundamental prediction of signal detection theory that noise should reduce both detection and discrimination of signals, little is known about these effects in animal communication. Female treefrogs, Hyla ebraccata, in Costa Rica choose mates in large noisy multispecies choruses. We tested gravid fem...

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