Results 131 to 140 of about 7,283,719 (303)
Hamiltonian maps and transport in structured fluids
Physica D: Nonlinear Phenomena, 1994 14 pages, Plain TeX, 6 Postscript figures to be published in Physica D, Proceedings of the NATO and EGS Workshop on Chaotic Advection, Tracer Dynamics, and Turbulent Dispersion, Sereno Di Gavi, Italy, May ...
openaire +3 more sources
The In Situ Electrochemical−Chemical Cascade Strategy for Pyruvic Acid Synthesis
Advanced Science, EarlyView.By employing an “unsaturation−oxygen coordination engineering” strategy, the local coordination environment is regulated to achieve efficient electrochemical synthesis of H2O2. Importantly, an electrochemical−chemical coupled cascade strategy is utilized for the efficient preparation of pyruvic acid via lactic acid oxidation. ABSTRACT Hydrogen peroxide
Xueli Mei +6 more
wiley +1 more source
Symplectic Structure of Discrete Hamiltonian Systems
Journal of Mathematical Analysis and Applications, 2002 The author considers the discrete Hamiltonian system \[ \Delta x(t)= H_u(t,x(t+1),u(t)), \qquad \Delta u(t)= -H_x(t,x(t+1),u(t)), \tag{1} \] where \(x,u\in \mathbb R^d\), \(H(t,x,u)\) is the corresponding real Hamiltonian function having continuous derivatives in \(x\), \(u\).
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Spin Splitting Coupled Visible‐Light Driven Injection Photocurrent in Bilayer Altermagnets
Advanced Science, EarlyView.Interlayer engineering in bilayer altermagnets continuously tunes visible‐light injection photocurrents, accompanied by controllable altermagnetic spin splitting. Enhanced interlayer hybridization reconstructs the band and quantum geometries, leading to opposite evolution of the normal and magnetic injection currents and establishing a direct ...
Huanhuan Yang +3 more
wiley +1 more source
SPINI: a structure-preserving neural integrator for hamiltonian dynamics and parametric perturbation
Scientific ReportsStandard numerical solvers struggle with the long-term simulation of nonlinear Hamiltonian systems, often failing to preserve geometric structure and introducing unphysical errors.
Chengtian Liang +4 more
doaj +1 more source
ranocha/Hamiltonian-RRK-notebooks
, 2020 Relaxation Runge-Kutta Methods for Hamiltonian ...
Hendrik Ranocha (7307627) +3 more
core +1 more source
Advanced Science, EarlyView.This work reports conceptually unprecedented topological quantum biomaterials derived from engineered Pd3Sn nanostrips for oncological applications. Their near‐Fermi‐level electronic architecture and superior interfacial charge transport facilitate ultrasound‐amplified redox reactions and efficient ROS generation.
Zilu Chen +10 more
wiley +1 more source
POLYNOMIAL HAMILTONIAN STRUCTURE FOR THE A4-SYSTEM
Kyushu Journal of Mathematics, 1998 Let \(n\) be a positive integer. A linear differential equation of the form \[ {d^2y\over dx^2}+ p_1(x, t){dy\over dx}+ p_2(x,t) y=0 \] with \[ p_1(x, t)= -A_n(x, t)- \sum^n_{k= 1}{1\over x-\lambda_k}, \] \[ p_2(x,t)=- (2\alpha+ 1)x^n- 2 \sum^n_{j=1} H_j x^{n-j}+ \sum^n_{k= 1}{\mu_k\over x-\lambda_k} \] and \[ A_n(x,t)= 2x^{n+ 1}+ \sum^n_{j=1} jt_j x ...
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Q‐LEAP: Millisecond Hyperdimensional Optimization for Full‐Spectrum Optical Metamaterials
Advanced Science, EarlyView.Q‐LEAP integrates physics‐informed residual machine learning with factorization‐machine‐encoded quantum annealing to design full‐spectrum optical metamaterials. It explores a 2108 design space and, in a single 2.56 ms annealing step, reaches 85.83% of the theoretical FoM limit, enabling selective 5‐8 µm emission with 3–5 and 8–14 µm suppression and ∼40×
Zikang Guo +3 more
wiley +1 more source
On the Generalized Maxwell-Bloch Equations
Symmetry, Integrability and Geometry: Methods and Applications, 2006 A new Hamiltonian structure of the Maxwell-Bloch equations is described. In this setting the Maxwell-Bloch equations appear as a member of a family of generalized Maxwell-Bloch systems.
Pavle Saksida
doaj