Results 11 to 20 of about 848,819 (301)
Climatological Study of Ozone over Saudi Arabia
Atmosphere, 2021 In this work, analysis of the variability of total column ozone (TCO) over the Kingdom of Saudi Arabia (KSA) has been conducted during the 1979–2020 period based on the ECMWF-ERA5 dataset.
Saleha Al-Kallas +5 more
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pyHomogeneity: A Python Package for Homogeneity Test of Time Series Data
Journal of Open Research Software, 2023 The pyHomogeneity package is a pure python package for performing homogeneity tests. The homogeneity test is applied to detect one (or more) change-point/breakpoint in the time series or sequential data.
Md. Manjurul Hussain +2 more
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Homogeneity Test of Multi-Sample Covariance Matrices in High Dimensions
Mathematics, 2022 In this paper, a new test statistic based on the weighted Frobenius norm of covariance matrices is proposed to test the homogeneity of multi-group population covariance matrices.
Peng Sun, Yincai Tang, Mingxiang Cao
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Is the Universe homogeneous? [PDF]
, 2011 The standard model of cosmology is based on the existence of homogeneous surfaces as the background arena for structure formation. Homogeneity underpins both general relativistic and modified gravity models and is central to the way in which we interpret
Maartens, Roy
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Spatio-Temporal Variability in Hydroclimate over the Upper Yangtze River Basin, China
Atmosphere, 2022 As global warming produces dramatic climate changes, water management is facing increasingly serious challenges. Given to the process of climate change and its complex effects on watershed hydrology, this paper investigates the spatial and temporal ...
Ruting Yang, Bing Xing
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Statistical analysis and forecasting monthly temperature of Sanandaj synoptic station with the application of SARIMA model [PDF]
مدلسازی و مدیریت آب و خاک, 2023 Introduction Analysis and modeling of temperature time series are important challenges in predicting the behavior of the climate. Temperature is one of the basic elements of climate formation and the most basic factor in determining the role and ...
Mahmud Ahmadi, Muhammad Kamangar
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An accurate test for homogeneity of odds ratios based on Cochran's Q-statistic [PDF]
, 2015 Background: A frequently used statistic for testing homogeneity in a meta-analysis of K independent studies is Cochran's Q. For a standard test of homogeneity the Q statistic is referred to a chi-square distribution with K - 1 degrees of freedom. For the
AF Schmidt +28 more
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Homogeneity Test Based Voice Activity Detection
Al-Lisaniyyat, 2014 In this paper a new approach for voice activity detection (VAD) is proposed. This technique is based on homogeneity test of two autoregressive (AR) processes; each one models a speech window and involves the measure of a defined distance.
Ouahbi Rekik, Mustapha Djeddou
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Sichuan jingshen weisheng, 2021 The purpose of this paper was to introduce the methods of the "layered person-time data" rate ratio analysis and the SAS implementation. The specific contents included the following four aspects： ① the point estimation and the confidence interval ...
Hu Chunyan, Hu Liangping
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Unbiasedness of Tests for Homogeneity
The Annals of Statistics, 1987 The authors consider the problem of testing homogeneity of k-samples drawn from a one-parameter exponential family with pdf \(f(x,\theta)=\beta (\theta)e^{\theta x} h(x)\) where h(x) is assumed log concave or is a Polya frequency function of order two. W.l.g.
Cohen, Arthur, Sackrowitz, Harold B.
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