Results 91 to 100 of about 274,119 (324)

Raising and lowering operators, factorization and differential/difference operators of hypergeometric type

, 2004
Starting from Rodrigues formula we present a general construction of raising and lowering operators for orthogonal polynomials of continuous and discrete variable on uniform lattice.
Atakishiev N A, Atakishiev N M, Atakishiev N M, Atakishiyev N M, Bangerezako G, Bangerezako G, Koekoek R, Lorente M, Lorente M, Lorente M, Miguel Lorente, Miller W, Miller W, Nikiforov A F, Nikiforov A F, Smirnov Y F, Smirnov Y F, Smirnov Y F, Spiridonov V, Spiridonov V, Spiridonov V   +20 more
core   +1 more source

Unraveling the Effect of Tramp Elements on Phase Transformations in Steels by Combining CALPHAD Modeling and Experiments

Advanced Engineering Materials, EarlyView.
This study investigates how tramp elements from increased scrap usage influence phase transformations in low‐alloyed steel. Combining dilatometry and microscopy reveal that tramp elements delay transformations, reduce critical cooling rates and increase hardenability.
Lukas Hatzenbichler, Daniel Marian Ogris, Phillip Haslberger, Matthew Galler, Oleksandr Glushko, Ronald Schnitzer   +5 more
wiley   +1 more source

An Adaptive Quantum-inspired Differential Evolution Algorithm for 0-1 Knapsack Problem

, 2010
Differential evolution (DE) is a population based evolutionary algorithm widely used for solving multidimensional global optimization problems over continuous spaces. However, the design of its operators makes it unsuitable for many real-life constrained
Hota, Ashish Ranjan, Pat, Ankit
core   +1 more source

Positivity and discrete spectra for differential operators

Journal of Differential Equations, 1982
In this paper the author deals with differential expressions of the form \(Ly=\sum^{n}_{j=0}(-1)^ j(p_ jy^{(j)})^{(j)}.\) For an interval \(I=[a,b)\), he considers an operator T defined by \(Tf=w^{-1}Lf\) where w is positive, locally Lebesgue integrable on I and \(f\in L^ 2_ w\) (the Hilbert space with inner product \((f,g)_ w=\int^{b}_{a}f\bar gw ...
openaire   +2 more sources

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

Advanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

Single channel medical images enhancement using fractional derivatives.

PLoS ONE
The current research uses the Grünwald-Letnikov (GL) fractional differential mask to improve satellite and medical images. One of the important image enhancement methods in digital image processing is texture enhancement.
Anand Singh, Mohammad Sajid, Naveen Kumar Tiwari, Anurag Shukla   +3 more
doaj   +1 more source

Numerical Exploration of Thermal Shock Resistance in MgO–C Refractories

Advanced Engineering Materials, EarlyView.
A mesostructure‐resolved numerical framework is developed to evaluate the thermal shock resistance of MgO–C refractories. By modeling interface debonding under rapid temperature changes and introducing a modified thermal shock parameter that accounts for mesocracks, the study shows how graphite content and aggregate size influence thermal shock ...
Jishnu Vinayak Gopi, Stephan Roth, Christos G. Aneziris, Bjoern Kiefer   +3 more
wiley   +1 more source

Algorithm for determining two-periodic steady-states in AC machines directly in time domain

Archives of Electrical Engineering, 2016
This paper describes an algorithm for finding steady states in AC machines for the cases of their two-periodic nature. The algorithm enables to specify the steady-state solution identified directly in time domain despite of the fact that two-periodic ...
Sobczyk Tadeusz J.
doaj   +1 more source

A Lightweight Procedural Layer for Hybrid Experimental–Computational Workflows in Materials Science

Advanced Engineering Materials, EarlyView.
We unveil a prototype hybrid‐workflow framework that fuses automatedcomputation with hands‐on experiments. Built atop pyiron, a lightweight, parameterized layer translates procedure descriptions into executable manual steps, syncing instrument settings, human interventions, and data capture in real‐time today.
Steffen Brinckmann, Sarath Menon, Raphael Röske, Johannes Steinhülb, Michael Selzer, Jan Janssen, Tilmann Hickel, Ruth Schwaiger, Jörg Neugebauer   +8 more
wiley   +1 more source

Spectral asymptotics via the semiclassical Birkhoff normal form

, 2006
This article gives a simple treatment of the quantum Birkhoff normal form for semiclassical pseudo-differential operators with smooth coefficients. The normal form is applied to describe the discrete spectrum in a generalised non-degenerate potential ...
Charles, Laurent, Ngoc, San Vu
core   +2 more sources