Results 41 to 50 of about 829 (116)

A New Padé Approach to Modeling Wormholes in Dekel‐Zhao Dark Matter Halos

Annalen der Physik, Volume 538, Issue 3, March 2026.
A matter‐first Padé strategy is introduced to build traversable wormholes from prescribed dark‐matter halos. Rational Padé fits approximately the Dekel–Zhao density and are analytically integrated to obtain a shape function that exactly reproduces the intended matter content, avoiding spurious poles of geometry‐first schemes.
Jonathan Alves Rebouças, Francisco Tiago Barboza Sampaio, Francisco Bento Lustosa, Leonardo Tavares de Oliveira, C. R. Muniz   +4 more
wiley   +1 more source

AN ATTITUDE MODELLING METHOD BASED ON THE INHERENT FREQUENCY OF A SATELLITE PLATFORM [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
The accuracy of attitude determination plays a key role in the improvement of surveying and mapping accuracy for high-resolution remote-sensing satellites, and it is a bottleneck in large-scale satellite topographical mapping.
F. Mo, X. Tang, J. Xie, C. Yan
doaj   +1 more source

Forced Response Analysis of Dynamic Systems With Inertia Nonlinearity by Applying the Multiharmonic Balance Method

Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 1, March 2026.
ABSTRACT Nonlinear mechanical vibrations under harmonic forcing can be well approximated by Fourier series. For a finite number of harmonics, the error is minimized over one period of vibration. This technique, known as multiharmonic balance method (MHBM), is today widely used in academics as well as industrial applications, e.g., for friction‐damped ...
Sebastian Tatzko, Sebastian Neumann, Tido Kubatschek   +2 more
wiley   +1 more source

Approximate Stability Analysis of Omega‐Stringer Stiffened Composite Panels

Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 1, March 2026.
ABSTRACT Thin‐walled composite structures are widely used in weight‐critical applications such as aircraft and spacecraft. However, ensuring the stability of such structures under various load cases remains a key challenge in their design and optimization.
Cherine El Yaakoubi‐Mesbah, Christian Mittelstedt   +1 more
wiley   +1 more source

TIE‐GCM ROPE—Part II: Dynamic Modeling

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Forecasting thermospheric density remains a critical challenge for satellite drag modeling and space situational awareness. Building on our previously introduced Reduced Order Probabilistic Emulator framework which compresses high‐dimensional Thermosphere‐Ionosphere‐ Electrodynamics General Circulation Model outputs into a low‐dimensional ...
Anirudh Tapedia, Daniele Sicoli, Piyush M. Mehta   +2 more
wiley   +1 more source

Interpolation in Spaces of Functions

Journal of Mathematical Extension, 2006
In this paper we consider the interpolation by certain functions such as trigonometric and rational functions for finite dimensional linear space X.
K. Mosaleheh
doaj  

On moments of the derivative of CUE characteristic polynomials and the Riemann zeta function

Journal of the London Mathematical Society, Volume 113, Issue 3, March 2026.
Abstract We study the derivative of the characteristic polynomial of N×N$N \times N$ Haar‐distributed unitary matrices. We obtain new explicit formulae for complex‐valued moments when the spectral variable is inside the unit disc, in the limit N→∞$N \rightarrow \infty$.
Nicholas Simm, Fei Wei
wiley   +1 more source

Numerical Approximation of a PDE‐Constrained Optimization Problem that Appears in Data‐Driven Computational Mechanics

International Journal for Numerical Methods in Engineering, Volume 127, Issue 4, 28 February 2026.
ABSTRACT We investigate an optimization problem that arises when working within the paradigm of Data‐Driven Computational Mechanics. In the context of the diffusion‐reaction problem, such an optimization problem seeks the continuous primal fields (gradient and flux) that are closest to some predefined discrete fields taken from a material data set. The
Pedro B. Bazon, Cristian G. Gebhardt, Gustavo C. Buscaglia, Roberto F. Ausas   +3 more
wiley   +1 more source

Phase‐Engineered Non‐Degenerate Sliding Ferroelectricity Enables Tunable Photovoltaics in Monolayer Janus In2S2Se

Advanced Science, Volume 13, Issue 11, 23 February 2026.
The meticulously phase‐engineered non‐degenerate sliding ferroelectricities in monolayer In2S2Se, along with their tunable impacts on photovoltaic performances, introduce innovative perspectives for the future design and optimization of 2D advanced photovoltaic devices.
Yixuan Li, Qiang Wang, Keying Han, Yitong Liang, Kai Kong, Yan Liang, Thomas Frauenheim, Xingshuai Lv, Defeng Guo, Bin Wang   +9 more
wiley   +1 more source

Optical quantum sensing for agnostic environments via deep learning

Physical Review Research
Optical quantum sensing promises measurement precision beyond classical sensors termed the Heisenberg limit (HL). However, conventional methodologies often rely on prior knowledge of the target system to achieve HL, presenting challenges in practical ...
Zeqiao Zhou, Yuxuan Du, Xu-Fei Yin, Shanshan Zhao, Xinmei Tian, Dacheng Tao   +5 more
doaj   +1 more source