Results 71 to 80 of about 219,337 (309)
Advanced Science, EarlyView.On the Qinghai–Tibetan Plateau, microbial carbon use efficiency (CUE) peaks at intermediate soil organic carbon levels and declines thereafter. In carbon‐rich soils, the formation of stable mineral‐associated organic carbon is decoupled from microbial CUE.
Yuting Wang +8 more
wiley +1 more source
A New Nonsmooth Bundle-Type Approach for a Class of Functional Equations in Hilbert Spaces
Journal of Function Spaces, 2017 A new bundle-type approach for solving a class of functional equations is presented by combining bundle idea for nonsmooth optimization with common iterative process for functional equations.
Jie Shen +3 more
doaj +1 more source
Separable Concave Optimization Approximately Equals Piecewise-Linear Optimization [PDF]
, 2012 We study the problem of minimizing a nonnegative separable concave function over a compact feasible set. We approximate this problem to within a factor of 1+epsilon by a piecewise-linear minimization problem over the same feasible set. Our main result is
Magnanti, Thomas L., Stratila, Dan
core +1 more source
Ultrafast Multilevel Switching and Synaptic Behavior in a Planar Quantum Topological Memristor
Advanced Science, EarlyView.Dry‐transferred Bi2Te3 layers enable a planar quantum topological memristor framework. In‐plane topological surface states facilitate ultrafast & low‐power operations. Coexisting analog and digital modes support current‐controlled multilevel states. PQTM exhibits 105 s retention, 103 cycles endurance, and reproducibility across 24 devices.
Mamoon Ur Rashid +12 more
wiley +1 more source
Advanced Science, EarlyView.A MXene‐enhanced electrochemical sensor enables the rapid and direct detection of methamphetamine. Molecular simulations reveal that specific MXene surface functional groups act as key signal amplifiers by facilitating interfacial interactions. The sensor demonstrates high sensitivity and robust performance in complex biological matrices.
Ri Wang +7 more
wiley +1 more source
A block Krylov subspace time-exact solution method for linear ODE systems [PDF]
, 2012 We propose a time-exact Krylov-subspace-based method for solving linear ODE (ordinary differential equation) systems of the form $y'=-Ay + g(t)$ and $y''=-Ay + g(t)$, where $y(t)$ is the unknown function. The method consists of two stages.
Botchev, M.A.
core +2 more sources
Physics‐Embedded Neural Network: A Novel Approach to Design Polymeric Materials
Advanced Science, EarlyView.Traditional black‐box models for polymer mechanics rely solely on data and lack physical interpretability. This work presents a physics‐embedded neural network (PENN) that integrates constitutive equations into machine learning. The approach ensures reliable stress predictions, provides interpretable parameters, and enables performance‐driven, inverse ...
Siqi Zhan +8 more
wiley +1 more source
Behavioral Model of RF PAs Including Load Mismatch Effects Based on Canonical Section-wise Piecewise-Linear Function [PDF]
, 2020 Jialin Cai, Justin King
openalex +1 more source
Piecewise-Linear Lyapunov Functions for Linear Stationary Systems
Automation and Remote Control, 2002 The paper deals with piecewise-linear Lyapunov functions for the linear stationary system described by the vector differential equation \[ \frac {dx}{dt}=Ax,\quad x\in \mathbb R^N, \] where \(A\) is a real \(N\times N\)-matrix with constant elements. A Lyapunov function for this system can be constructed in the class of piecewise-linear functions as ...
openaire +4 more sources
Symmetrical Piecewise Linear Functions Composed by Absolute Value Function
Formalized Mathematics, 2023 Summary We continue the formal development of the application of piecewise linear functions and centroids in the area of fuzzy set theory. The corresponding piecewise linear functions are symmetrical and composed by absolute function. In this paper we prove that the membership functions of isosceles triangle type and isosceles trapezoid ...
openaire +3 more sources