Results 141 to 150 of about 29,735 (296)

Existence and Uniqueness of Solution Represented as Fractional Power Series for the Fractional Advection–Dispersion Equation

Symmetry
The fractional advection–dispersion equation is used in groundwater hydrology for modeling the movements of contaminants/solute particles along with flowing groundwater at the seepage velocity in porous media. This model is used for the prediction of the transport of nonreactive dissolved contaminants in groundwater.
Alexandru-Nicolae Dimache, Ghiocel Groza, Marilena Jianu, Iulian Iancu   +3 more
openaire   +1 more source

Fractional Power Series Method For Solving The time-fractional biological population model equation

, 2017
In this paper, we present approximate analytical solution of the time-fractional biological population equation using the fractional power series method (FPSM). The fractional derivatives are described in the Caputo sense. Some examples are given and the
Mahdy, Amr M. S., A. M. S. Mahdy, G. M. A. Marai, A.Marai, G. M.   +3 more
core   +1 more source

3D Printing Innovations in Polymeric Porous and Patterned Architecture

Advanced Functional Materials, EarlyView.
Polymeric foams occupy a unique structural space between dense solids and open networks, where engineered void fraction governs mechanical compliance, thermal resistance, and mass transport. Additive manufacturing now enables precise spatial control over cellular architecture, unlocking designer foam structures across applications spanning crash ...
Dhanush Patil, Sri Vaishnavi Thummalapalli, Clarissa Westover, Arunachalam Ramanathan, M. Taylor Sobzcak, Roumika Patil, Qixuan Xiang, Tiantian Li, Sui Yang, Timothy E. Long, Hongyue Sun, Xianqiao Wang, Yang Liu, Kenan Song   +13 more
wiley   +1 more source

Graphical and numerical validation of the least-square Laplace residual power series method for fractional Fokker-Planck equations: a study of anomalous diffusion

Boundary Value Problems
The time-fractional Fokker-Planck equations are used to provide basic modeling of anomalous diffusion and non-Markovian processes in transport that occur in physics, biology and complex systems.
Ahmad Albaity, Musaad S. Aldhabani, Ali H. Hakami, Samaruddin Jebran   +3 more
doaj   +1 more source

Cointegration in Fractional Systems with Deterministic Trends [PDF]

We consider a cointegrated system generated by processes that may be fractionally integrated, and by additive polynomial and generalized polynomial trends.
Fabrizio Iacone, Peter M Robinson
core  

In Situ Crystalline‐Amorphous Composite Oxide Structure Suppressing Thermal Wear Instability for Refractory Multi‐Principal Element Alloy

Advanced Functional Materials, EarlyView.
An effective strategy is developed to overcome the medium temperatures wear resistance degradation in refractory multi‐principal element alloys. By utilizing chemical short‐range ordering to trigger oxygen‐induced amorphization, a composite oxide structure is formed, which combines high hardness with robust stiffness.
Xuhui Pei, Jianbao Zhang, Hanming Wang, Yin Du, Tao Yang, Ji‐Jung Kai, Benyebka Bou‐Saïd, Haifeng Wang   +7 more
wiley   +1 more source

Spectroscopic Investigation of Polysulfide Redox Evolution in Catholyte Solutions for Potassium–Sulfur Batteries

Advanced Functional Materials, EarlyView.
Potassium–sulfur batteries are investigated using UV–vis spectroscopy to track the evolution of potassium polysulfide species at elevated temperature. The study reveals sulfur radical anions as key intermediates and shows how solvent composition and cell design influence polysulfide stability, redox behavior, and cycling performance, providing insights
Chiara Morini, Dawid Kasprzak, Lincoln Crowe, Cecilia Spedalieri, Johannes Baller, Naiyu Qi, Fariza Kalyk, Gustav Graeber   +7 more
wiley   +1 more source

A REEXAMINATION OF FRACTIONAL INTEGRATING DYNAMICS IN FOREIGN CURRENCY MARKETS

This paper reexamines foreign currency markets for evidence of fractional integration, and extends the extant literature in several important dimensions.
Koo, Won W., Elder, John, Jin, Hyun Joung   +2 more
core  

Self‐Adaptive Anhydrous Passivation Mitigates Open‐Circuit Voltage Loss in Pb‐Sn Mixed Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
In this report, a self‐adaptive anhydrous passivation strategy is introduced by incorporating trimellitic anhydride (TMAH) into the perovskite precursor. In situ hydrolysis of TMAH yields trimellitic acid (TMA); ‐C═O/‐COO− groups of TMAH/TMA form a chelate with undercoordinated Pb2+/Sn2+, regulate nucleation, promote (100) orientation, passivate ...
Md. Ataur Rahman, Md. Abdul Karim, Md. Emrul Kayesh, Siliang Cao, Shamim Ahmmed, Kiyoto Matsuishi, Ashraful Islam   +6 more
wiley   +1 more source

The Empirical Properties of Some Popular Estimators of Long Memory Processes [PDF]

We present the results of a simulation study into the properties of 12 different estimators of the Hurst parameter, H, or the fractional integration parameter, d, in long memory time series.
Jennifer Brown, Les Oxley, William Rea, Marco Reale   +3 more
core