Zobrazeno 1 - 10
of 1 486
pro vyhledávání: '"Ollila, P."'
The Internet of Things paradigm heavily relies on a network of a massive number of machine-type devices (MTDs) that monitor various phenomena. Consequently, MTDs are randomly activated at different times whenever a change occurs. In general, fewer MT
Externí odkaz:
http://arxiv.org/abs/2405.02741
Autor:
Ollila, Esa
We propose greedy Capon beamformer (GCB) for direction finding of narrow-band sources present in the array's viewing field. After defining the grid covering the location search space, the algorithm greedily builds the interference-plus-noise covarian
Externí odkaz:
http://arxiv.org/abs/2404.15329
Autor:
Ollila, Esa
In the Multiple Measurements Vector (MMV) model, measurement vectors are connected to unknown, jointly sparse signal vectors through a linear regression model employing a single known measurement matrix (or dictionary). Typically, the number of atoms
Externí odkaz:
http://arxiv.org/abs/2401.13975
Autor:
C. Royer, C. C. Bedford, J. R. Johnson, B. H. N. Horgan, A. Broz, O. Forni, S. Connell, R. C. Wiens, L. Mandon, B. S. Kathir, E. M. Hausrath, A. Udry, J. M. Madariaga, E. Dehouck, R. B. Anderson, P. Beck, O. Beyssac, É. Clavé, S. M. Clegg, E. Cloutis, T. Fouchet, T. S. J. Gabriel, B. J. Garczynski, A. Klidaras, H. T. Manelski, L. Mayhew, J. Núñez, A. M. Ollila, S. Schröder, J. I. Simon, U. Wolf, K. M. Stack, A. Cousin, S. Maurice
Publikováno v:
Communications Earth & Environment, Vol 5, Iss 1, Pp 1-13 (2024)
Abstract The NASA Perseverance rover discovered light-toned float rocks scattered across the surface of Jezero crater that are particularly rich in alumina ( ~ 35 wt% Al2O3) and depleted in other major elements (except silica). These unique float roc
Externí odkaz:
https://doaj.org/article/62641cff948041ab94edca3ddaf8c5dd
Autor:
Ollila, Esa
This chapter reviews methods for linear shrinkage of the sample covariance matrix (SCM) and matrices (SCM-s) under elliptical distributions in single and multiple populations settings, respectively. In the single sample setting a popular linear shrin
Externí odkaz:
http://arxiv.org/abs/2308.04721
We propose estimating the scale parameter (mean of the eigenvalues) of the scatter matrix of an unspecified elliptically symmetric distribution using weights obtained by solving Tyler's M-estimator of the scatter matrix. The proposed Tyler's weights-
Externí odkaz:
http://arxiv.org/abs/2305.04330
Expectation-Maximization (EM) algorithm is a widely used iterative algorithm for computing (local) maximum likelihood estimate (MLE). It can be used in an extensive range of problems, including the clustering of data based on the Gaussian mixture mod
Externí odkaz:
http://arxiv.org/abs/2303.14989
Autor:
Cavender, Chapin E., Case, David A., Chen, Julian C. -H., Chong, Lillian T., Keedy, Daniel A., Lindorff-Larsen, Kresten, Mobley, David L., Ollila, O. H. Samuli, Oostenbrink, Chris, Robustelli, Paul, Voelz, Vincent A., Wall, Michael E., Wych, David C., Gilson, Michael K.
This review article provides an overview of structurally oriented, experimental datasets that can be used to benchmark protein force fields, focusing on data generated by nuclear magnetic resonance (NMR) spectroscopy and room temperature (RT) protein
Externí odkaz:
http://arxiv.org/abs/2303.11056
A robust and sparse Direction of Arrival (DOA) estimator is derived for array data that follows a Complex Elliptically Symmetric (CES) distribution with zero-mean and finite second-order moments. The derivation allows to choose the loss function and
Externí odkaz:
http://arxiv.org/abs/2301.06213
Autor:
Toni T. Lemmetyinen, Emma W. Viitala, Linnea Wartiovaara, Pekka Päivinen, Heikki T. Virtanen, Nalle Pentinmikko, Pekka Katajisto, Tomi P. Mäkelä, Timothy C. Wang, Jaan-Olle Andressoo, Saara Ollila
Publikováno v:
iScience, Vol 27, Iss 12, Pp 111246- (2024)
Summary: Enteroendocrine cells (EECs) differentiate and mature to form functionally distinct populations upon migration along the intestinal crypt-villus axis, but how niche signals affect this process is poorly understood. Here, we identify expressi
Externí odkaz:
https://doaj.org/article/ea27196119484f11b10254daaf73c7e0