Results 71 to 80 of about 260,835 (293)

Dynamic Models and Nonlinear Filtering of Wave Propagation in Random Fields

, 2004
In this paper, a general model of wireless channels is established based on the physics of wave propagation. Then the problems of inverse scattering and channel prediction are formulated as nonlinear filtering problems.
Wei, Haiqing
core   +2 more sources

Infrared Nanocrystals for Space Application: Hardness to Irradiations

Advanced Functional Materials, EarlyView.
This article investigates infrared HgTe nanocrystals under X‐ray and ion irradiation, revealing remarkable radiation hardness. It uncovers distinct degradation mechanisms and shows that the nanomaterial outperforms integrated electronics. The results position colloidal nanocrystals as promising candidates for resilient space and harsh‐environment ...
Alexandre Neyret, Dario Mastrippolito, Bingbing Xia, Adrien Khalili, Maxime Lebreton, Giorgia Strobbia, Albin Colle, Marco Paye, Mariarosa Cavallo, Erwan Bossavit, Claire Abadie, Yoann Prado, Debora Pierucci, Victor Parahyba, Francois Coursaget, David Darson, Emrick Briand, Ian Vickridge, Stephane Demiguel, Sebastien Massenot, Jean‐Marc Belloir, Vincent Goiffon, Emmanuel Lhuillier   +22 more
wiley   +1 more source

Magnetic Force Microscopy Signatures of Higher‐Order Skyrmions and Antiskyrmions

Advanced Functional Materials, EarlyView.
Magnetic force microscopy operated under vacuum conditions enables the qualitative identification of higher‐order skyrmions and antiskyrmions in Co/Ni multilayers at room temperature. Distinct stray‐field contrast signatures arise from vertical Bloch lines and complex domain‐wall configurations.
Sabri Koraltan, Joe Sunny, Tamer Karaman, Reshma Peremadathil‐Pradeep, Emily Darwin, Felix Büttner, Dieter Suess, Hans Josef Hug, Manfred Albrecht   +8 more
wiley   +1 more source

Latent Abstractions in Generative Diffusion Models

Entropy
In this work, we study how diffusion-based generative models produce high-dimensional data, such as images, by relying on latent abstractions that guide the generative process. We introduce a novel theoretical framework extending Nonlinear Filtering (NLF)
Giulio Franzese, Mattia Martini, Giulio Corallo, Paolo Papotti, Pietro Michiardi   +4 more
doaj   +1 more source

Deep Nonlinear Non-Gaussian Filtering for Dynamical Systems

, 2018
Filtering is a general name for inferring the states of a dynamical system given observations. The most common filtering approach is Gaussian Filtering (GF) where the distribution of the inferred states is a Gaussian whose mean is an affine function of ...
Mehrjou, Arash, Schölkopf, Bernhard
core  

Dense Nanofibrillar Collagen–Silica Hybrids with High Strength and ECM‐Mimetic Tissue Integration

Advanced Functional Materials, EarlyView.
Dense nanofibrillar collagen–silica hybrids are engineered by synchronizing collagen fibrillogenesis with silica condensation, producing printable scaffolds that unexpectedly approach native extracellular matrix organization and strength. These cell‐free constructs guide endogenous cell‐infiltration, enable localized matrix remodeling, and integrate ...
Norein Norein, Shima Tavakoli, Philipp Wolf, Xie Ling, Veronica Rondahl, Klaus Leifer, Gry Hulsart‐Billström, Jöns Hilborn   +7 more
wiley   +1 more source

On the exchange of intersection and supremum of sigma-fields in filtering theory

, 2011
We construct a stationary Markov process with trivial tail sigma-field and a nondegenerate observation process such that the corresponding nonlinear filtering process is not uniquely ergodic. This settles in the negative a conjecture of the author in the
A. Budhiraja, A. J. Majda, B. Weiss, D. S. Ornstein, F. Hollander den, H. Kesten, H. Kunita, H. Matzinger, H. Totoki, H. Weizsäcker von, I. Crimaldi, I. Meilijson, J. Brossard, L. Chaumont, M. Rahe, M. Smorodinsky, M. Yor, M. Émery, O. Cappé, P. A. Meyer, P. Baxendale, P. Chigansky, P. Masani, R. Handel van, R. Handel van, R. Handel van, Ramon van Handel, S. A. Kalikow, S. Laurent, S. Meyn, V. A. Volkonskii, Ya. G. Sinai   +31 more
core   +1 more source

Imaging of Biphoton States: Fundamentals and Applications

Advanced Functional Materials, EarlyView.
Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley   +1 more source

Spherical Simplex-Radial Cubature Quadrature Kalman Filter

Journal of Electrical and Computer Engineering, 2017
A spherical simplex-radial cubature quadrature Kalman filter (SSRCQKF) is proposed in order to further improve the nonlinear filtering accuracy. The Gaussian probability weighted integral of the nonlinear function is decomposed into spherical integral ...
Zhaoming Li, Wenge Yang
doaj   +1 more source

Spatial and spectral properties of the pulsed second-harmonic generation in a PP-KTP waveguide

, 2012
Spatial and spectral properties of the pulsed second harmonic generation in a periodically-poled KTP waveguide exploiting simultaneously the first, second, and third harmonics of periodic nonlinear modulation are analyzed.
A. Snyder, E. Kawano, I. Rubinstein, J. Jin, J. Peřina, Jan Peřina, Jan Soubusta, Jiří Svozilík, L. Mandel, N. Yu, N. Yu, Ondřej Haderka, R. Boyd, Radek Machulka, W. Arnoldi   +14 more
core   +1 more source