Temat: outlier test - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Comparison of outlier detection methods in biomedical data
Autorzy:: Chromiński, K.
Tkacz, M.
Powiązania:: https://bibliotekanauki.pl/articles/333124.pdf
Data publikacji:: 2010
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: wykrywanie próbek odstających
diagnozy medyczne
test obserwacji odstających
outlier detection
medical diagnoses
outlier test
Opis:: In this paper the use of outlier detection methods is discussed. This analysis is an introduction to the use of various methods of outlier detection in medical diagnoses (screening). The authors investigated the usefulness of selected outlier detection methods in the context of detection sensitivity, speed performance analysis and the difficulty of automating the performance analysis by using the test methods for outlier detection.
Źródło:: Journal of Medical Informatics & Technologies; 2010, 16; 89-94
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: An attempt to determine the effect of increase of observation correlations on detectability and identifiability of a single gross error
Autorzy:: Prószyński, W.
Kwaśniak, M.
Powiązania:: https://bibliotekanauki.pl/articles/145479.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: sieć GPS
sieć geodezyjna
system nawigacji
single outlier case
correlated observations
detectability
identifiability
outlier-test sensitivity
mean-shift model
Opis:: The paper presents the results of investigating the effect of increase of observation correlations on detectability and identifiability of a single gross error, the outlier test sensitivity and also the response-based measures of internal reliability of networks. To reduce in a research a practically incomputable number of possible test options when considering all the non-diagonal elements of the correlation matrix as variables, its simplest representation was used being a matrix with all non-diagonal elements of equal values, termed uniform correlation. By raising the common correlation value incrementally, a sequence of matrix configurations could be obtained corresponding to the increasing level of observation correlations. For each of the measures characterizing the above mentioned features of network reliability the effect is presented in a diagram form as a function of the increasing level of observation correlations. The influence of observation correlations on sensitivity of the w-test for correlated observations (Förstner 1983, Teunissen 2006) is investigated in comparison with the original Baarda’s w-test designated for uncorrelated observations, to determine the character of expected sensitivity degradation of the latter when used for correlated observations. The correlation effects obtained for different reliability measures exhibit mutual consistency in a satisfactory extent. As a by-product of the analyses, a simple formula valid for any arbitrary correlation matrix is proposed for transforming the Baarda’s w-test statistics into the w-test statistics for correlated observations.
Źródło:: Geodesy and Cartography; 2016, 65, 2; 313-333
2080-6736
2300-2581
Pojawia się w:: Geodesy and Cartography
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Testing on the first-order autoregressive model with contaminated exponential white noise finite sample case
Autorzy:: Fellag, Hocine
Powiązania:: https://bibliotekanauki.pl/articles/729886.pdf
Data publikacji:: 2001
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:: autoregressive model
exponential distribution
outlier
test
Opis:: The testing problem on the first-order autoregressive parameter in finite sample case is considered. The innovations are distributed according to the exponential distribution. The aim of this paper is to study how much the size of this test changes when, at some time k, an innovation outlier contaminant occurs. We show that the test is rather sensitive to these changes.
Źródło:: Discussiones Mathematicae Probability and Statistics; 2001, 21, 1; 11-20
1509-9423
Pojawia się w:: Discussiones Mathematicae Probability and Statistics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Unit root test under innovation outlier contamination small sample case
Autorzy:: Atil, Lynda
Fellag, Hocine
Nouali, Karima
Powiązania:: https://bibliotekanauki.pl/articles/729686.pdf
Data publikacji:: 2006
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:: autoregressive process
Dickey-Fuller test
innovation outlier
power
size
Opis:: The two sided unit root test of a first-order autoregressive model in the presence of an innovation outlier is considered. In this paper, we present three tests; two are usual and one is new. We give formulas computing the size and the power of the three tests when an innovation outlier (IO) occurs at a specified time, say k. Using a comparative study, we show that the new statistic performs better under contamination. A Small sample case is considered only.
Źródło:: Discussiones Mathematicae Probability and Statistics; 2006, 26, 1; 5-17
1509-9423
Pojawia się w:: Discussiones Mathematicae Probability and Statistics
Dostawca treści:: Biblioteka Nauki

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