Results 41 to 50 of about 37,248 (196)

QPSK Training Sequence-Based Both OSNR and Chromatic Dispersion Monitoring in DWDM Systems

IEEE Photonics Journal, 2018
We design a quadrature phase-shift keying training sequence (QPSK-TS) for monitoring both optical signal-to-noise ratio (OSNR) and chromatic dispersion (CD) in a dense wavelength division multiplexing (DWDM) system.
Feilong Wu, Aiying Yang, Peng Guo, Yaojun Qiao, Lingwei Zhuang, Shaojian Guo   +5 more
doaj   +1 more source

Improving teleportation of continuous variables by local operations

, 2004
We study a continuous-variable (CV) teleportation protocol based on a shared entangled state produced by the quantum-nondemolition (QND) interaction of two vacuum states.
D. F. Walls, J.-Ph. Poizat, Ladislav Mišta, Radim Filip, S. L. Braunstein, W. P. Bowen   +5 more
core   +1 more source

Asymptotically optimal definite quadrature formulae of 4th order

Journal of Computational and Applied Mathematics, 2017
26 pages, 4 figures, 4 ...
Avdzhieva, Ana, Nikolov, Geno
openaire   +3 more sources

Stability Evaluation and Parametric Optimization of Coal‐Concrete Composite Bearing Systems Under Mine‐Water‐Induced Deterioration: Experiments and FEINN Analysis

Energy Science &Engineering, EarlyView.
Mine‐water immersion tests reveal pronounced coal weakening (vs. minor concrete degradation), identifying coal pillars as the stability‐limiting component in composite dams. A coupled FEINN framework quantifies extreme‐pressure stability and ranks multi‐parameter designs via a normalized multi‐indicator scheme, enabling optimized dam configuration for ...
He Wen, Hongchuan Dai, Guixin Zhang, Pengzhe Li, Tong Yang, Cang Gong, Renbo Gao   +6 more
wiley   +1 more source

The discrete analogue of high-order differential operator and its application to finding coefficients of optimal quadrature formulas

Journal of Inequalities and Applications
The discrete analog of the differential operator plays a significant role in constructing interpolation, quadrature, and cubature formulas. In this work, we consider a discrete analog D m ( h β ) $D_{m}(h\beta )$ of the differential operator d 2 m d x 2 ...
K. M. Shadimetov, J. R. Davronov
doaj   +1 more source

ERROR BOUNDS FOR SURFACE AREA ESTIMATORS BASED ON CROFTON’S FORMULA

Image Analysis and Stereology, 2011
According to Crofton's formula, the surface area S(A) of a sufficiently regular compact set A in Rd is proportional to the mean of all total projections pA (u) on a linear hyperplane with normal u, uniformly averaged over all unit vectors u.
Markus Kiderlen, Daniel Meschenmoser
doaj   +1 more source

Quadrature-Based Vector Fitting: Implications For H2 System Approximation

, 2014
Vector Fitting is a popular method of constructing rational approximants designed to fit given frequency response measurements. The original method, which we refer to as VF, is based on a least-squares fit to the measurements by a rational function ...
Beattie, Christopher, Drmac, Zlatko, Gugercin, Serkan   +2 more
core   +1 more source

Benchmarking Hybrid CNN‐Transformer Versus Pure Transformer Architectures for Accelerated Hyperpolarized 129Xe MRI Reconstruction

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background Hyperpolarized 129Xe MRI faces technical challenges including low signal‐to‐noise ratio and breath‐hold constraints. Current literature focuses on proprietary deep learning methods or image‐domain enhancements. Purpose To present a comprehensive evaluation of transformer and hybrid CNN‐transformer architectures integrating dual ...
Ramtin Babaeipour, Matthew S. Fox, Grace Parraga, Alexei Ouriadov   +3 more
wiley   +1 more source

Is Gauss quadrature better than Clenshaw-Curtis? [PDF]

, 2006
We consider the question of whether Gauss quadrature, which is very famous, is more powerful than the much simpler Clenshaw-Curtis quadrature, which is less well-known.
Trefethen, Lloyd N.
core  

Optimal finite measurements and Gauss quadratures

, 2006
We exhibit measurements for optimal state estimation which have a finite number of outcomes. This is achieved by a connection between finite optimal measurements and Gauss quadratures.
Bagan, Bagan, Derka, Gill, Hardin, Hayashi, Hayashi, Jérémie Roland, Latorre, Lebedev, Lebedev, Lebedev, Massar, Perelomov, Peres, Sofyan Iblisdir, Szego, Vidal   +17 more
core   +1 more source