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of 3 233
pro vyhledávání: '"Yacouba, A"'
In this article, we study the asymptotic behaviour of the residual autocorrelations for periodic vector autoregressive time series models (PVAR henceforth) with uncorrelated but dependent innovations (i.e., weak PVAR). We then deduce the asymptotic d
Externí odkaz:
http://arxiv.org/abs/2409.20001
Autor:
Bargo, Marius, Simpore, Yacouba
In this paper, we investigate, simultaneously, the null-controllability via the feedback control method and the turnpike property of dynamic systems arising from population dynamics models where the control is localized on the non-local term. These m
Externí odkaz:
http://arxiv.org/abs/2409.11247
Recently proposed automatic pathological speech detection approaches rely on spectrogram input representations or wav2vec2 embeddings. These representations may contain pathology irrelevant uncorrelated information, such as changing phonetic content
Externí odkaz:
http://arxiv.org/abs/2409.17276
Despite the promising performance of state of the art approaches for Parkinsons Disease (PD) detection, these approaches often analyze individual speech segments in isolation, which can lead to suboptimal results. Dysarthric cues that characterize sp
Externí odkaz:
http://arxiv.org/abs/2409.07884
Autor:
Simporé, Yacouba
This article examines an infinite-dimensional linear control system that describes population models structured by age, size, and spatial position. The control is localized with respect to space, age and size; an estimate of the time required to brin
Externí odkaz:
http://arxiv.org/abs/2408.05291
Autor:
Yacouba, Abdoul Nasser, Mallet, C., Deparis, J., Gaboreau, S., Leroy, P., Jougnot, D., Azaroual, M.
Publikováno v:
85th EAGE Annual Conference & Exhibition - Workshop Programme, Jun 2024, Oslo, Norway. pp.1-5
In recent years, water needs increased, driven by climate change and world population growth. In this context, we study groundwater flow in the vadose zone of Beauce aquifer (O-ZNS site, France). This lacustrine limestone vadose zone is characterized
Externí odkaz:
http://arxiv.org/abs/2406.16436
Publikováno v:
Journal of the American Statistical Association, 2018, 113 (524), pp.1813-1827
In this paper we derive the asymptotic distribution of normalized residual empirical autocovariances and autocorrelations under weak assumptions on the noise. We propose new portmanteau statistics for vector autoregressive moving-average (VARMA) mode
Externí odkaz:
http://arxiv.org/abs/2404.12692
Publikováno v:
Journal of Time Series Analysis, 2022, 43 (6), pp.964-1002
We establish the asymptotic behaviour of the sum of squared residuals autocovariances and autocorrelations for the class of multi-variate power transformed asymmetric models. We then derive a portmanteau test. We establish the asymptotic distribution
Externí odkaz:
http://arxiv.org/abs/2404.12685
Publikováno v:
Test, 2023, 32 (3), pp.958-997
This article develops the asymptotic distribution of the least squares estimator of the model parameters in periodicvector autoregressive time series models (hereafter PVAR) with uncorrelated but dependent innovations. When theinnovations are depende
Externí odkaz:
http://arxiv.org/abs/2404.12684
We consider an observed subcritical Galton Watson process $\{Y_n,\ n\in \mathbb{Z} \}$ with correlated stationary immigration process $\{\epsilon_n,\ n\in \mathbb{Z} \}$. Two situations are presented. The first one is when $\mbox{Cov}(\epsilon_0,\eps
Externí odkaz:
http://arxiv.org/abs/2404.12137