Results 161 to 170 of about 688 (217)

Large Language Model‐Based Localization of Premature Ventricular Contraction Origins: A Retrospective Diagnostic Accuracy Study

Journal of Cardiovascular Electrophysiology, EarlyView.
ABSTRACT Background Accurate localization of premature ventricular contraction (PVC) origin from 12‐lead electrocardiography (ECG) is important for procedural planning in catheter ablation. Although convolutional neural network (CNN)‐based models have shown promising diagnostic performance, they require task‐specific training and remain limited in ...
Kazuhisa Matsumoto, Yuya Fujisaki, Syunta Higuchi, Masataka Narita, Wataru Sasaki, Tsukasa Naganuma, Naomichi Tanaka, Daisuke Kawano, Kei Matsumoto, Wataru Yoshino, Yoshifumi Ikeda, Ritsushi Kato, Hitoshi Mori   +12 more
wiley   +1 more source

Continuous Operators from Spaces of Lipschitz Functions. [PDF]

Results Math
Bargetz C, Kąkol J, Sobota D.
europepmc   +1 more source

A Note on Local Polynomial Regression for Time Series in Banach Spaces

Journal of Time Series Analysis, EarlyView.
ABSTRACT This work extends local polynomial regression to Banach space‐valued time series for estimating smoothly varying means and their derivatives in non‐stationary data. The asymptotic properties of both the standard and bias‐reduced Jackknife estimators are analyzed under mild moment conditions, establishing their convergence rates.
Florian Heinrichs
wiley   +1 more source

A useful formula for periodic Jacobi matrices on trees. [PDF]

Proc Natl Acad Sci U S A
Banks J, Breuer J, Garza-Vargas J, Seelig E, Simon B.   +4 more
europepmc   +1 more source

Detecting Periodicity of a General Stationary Time Series via AR(2)‐Model Fitting

Journal of Time Series Analysis, EarlyView.
ABSTRACT Estimating the periodicity of a stationary time series via fitting a second‐order stationary autoregressive (AR(2)) model has been initiated by the seminal paper of Yule (1927). We investigate properties of this procedure when applied to general stationary processes possessing a spectral density with a dominant peak at some unknown frequency ...
Jens‐Peter Kreiss, Panagiotis Maouris, Efstathios Paparoditis   +2 more
wiley   +1 more source

Arrow of Time in Quantum Mechanics and Set Theory. [PDF]

Entropy (Basel)
Król J.
europepmc   +1 more source

Near Linearity of the Macroscopic Hall Current Response in Infinitely Extended Gapped Fermion Systems. [PDF]

Commun Math Phys
Wesle M, Marcelli G, Miyao T, Monaco D, Teufel S.   +4 more
europepmc   +1 more source

On the Monotonicity of Relative Entropy: A Comparative Study of Petz's and Uhlmann's Approaches. [PDF]

Entropy (Basel)
Matheus S, Bottacin F, Provenzi E.
europepmc   +1 more source

On degree-based operators and topological descriptors of molecular graphs and their applications to QSPR analysis of carbon derivatives. [PDF]

Sci Rep
Khan AR, Bhatti SA, Tawfiq F, Siddiqui MK, Hussain S, Ali MA.   +5 more
europepmc   +1 more source

Reliability as Projection in Operator-Theoretic Test Theory: Conditional Expectation, Hilbert Space Geometry, and Implications for Psychometric Practice. [PDF]

Educ Psychol Meas
Zumbo BD.
europepmc   +1 more source