Results 141 to 150 of about 3,415,330 (329)

Roll‐to‐Roll Processable EC/TC Hybrid Smart Windows Driven by a Bidirectional Dual‐Chromic Polymer Electrolyte

Advanced Functional Materials, EarlyView.
We present a scalable EC/TC hybrid smart window using a DCPE that enables tunable solar modulation (ΔTsol:15–43%), fast electrochromic switching (<90 s), and strong thermal blocking (10–14°C reduction). HPMC improves thermal stability, while an optimized ISL enhances EC performance.
Soyeon Kim, Euiseok Jeong, Muhammad Jahandar, Huynh Tan Thanh Kha, Dong Chan Lim   +4 more
wiley   +1 more source

Perception of power quality disturbances using Fourier, Short-Time Fourier, continuous and discrete wavelet transforms

Scientific Reports
Electric power utilities must ensure a consistent and undisturbed supply of power, with the voltage levels adhering to specified ranges. Any deviation from these supply specifications can lead to malfunctions in equipment.
M. S. Priyadarshini, Mohit Bajaj, Lukas Prokop, Milkias Berhanu   +3 more
doaj   +1 more source

Spherical Fourier Transforms on Locally Compact Quantum Gelfand Pairs

Symmetry, Integrability and Geometry: Methods and Applications, 2011
We study Gelfand pairs for locally compact quantum groups. We give an operator algebraic interpretation and show that the quantum Plancherel transformation restricts to a spherical Plancherel transformation.
Martijn Caspers
doaj   +1 more source

Bacterial Cellulose‐Based Bilayer Passive Cooler for High‐Performance Radiative/Evaporative Cooling

Advanced Functional Materials, EarlyView.
A sustainable bilayer passive cooler based on bacterial cellulose integrates radiative and evaporative cooling for efficient zero‐energy temperature reduction. The scalable, low‐carbon material shows strong potential for food preservation, low‐temperature storage, and cold‐chain logistics.
Yibing Zhang, Da‐Wen Sun, Liang Xu, You Tian, Libin Sun, Rui Hu, Shiwei Zheng   +6 more
wiley   +1 more source

On a property of the Fourier transform.

MATHEMATICA SCANDINAVICA, 1997
The paper consists of the following result. Let \(C_0(\mathbb{R})\) be the sup-norm Banach space of continuous functions vanishing at infinity. Theorem. If \(X\) is a closed reflexive subspace of \(C_0(\mathbb{R})\) consisting entirely of Fourier transforms of \(L_1(\mathbb{R})\) functions, then \(X\) is finite-dimensional.
openaire   +2 more sources

Coordination‐Modulated Catalytic Pathways at Carbon Dots‐Supported Single‐Atom Sites Revealed by Thiol Interactions

Advanced Functional Materials, EarlyView.
Carbon dots‐supported single‐atom catalysts provide a model platform for uncovering how coordination interactions regulate catalytic reactivity. Thiol binding at Ru‒N4 centers reshapes the reaction energy landscape of H2O2 activation, dynamically modulating ROS‐generation pathways through electronic‐structure perturbation.
Yihong Chen, Li Zhang, Qian Dong, Qingshi Liu, Kun Wang, Huiping Wang, Shaomin Shuang, Chuan Dong, Jin‐Chang Guo, Xiaojuan Gong, Zhuo Chen, Yingfu Li   +11 more
wiley   +1 more source

Orthogonality Conditions for Non-Dyadic Wavelet Analysis [PDF]

The conventional dyadic multiresolution analysis constructs a succession of frequency intervals in the form of ( π  / 2  j , π  / 2  j  - 1 ); j  = 1, 2, . . . ,  n of which the bandwidths are halved repeatedly in the descent from high frequencies to low
Stephen Pollock, Iolanda Lo Cascio
core  

Fractional cosine and sine transforms

, 2002
The fractional cosine and sine transforms - closely related to the fractional Fourier transform, which is now actively used in optics and signal processing - are introduced and their main properties and possible applications are ...
Bastiaans, M.J., Bastiaans, MJ Martin, Alieva, T Tatiana, Tatiana Alieva, Alieva, T., Martin J. Bastiaans   +5 more
core   +1 more source

Mechanical Programming of PEGDA‐β‐CD Polyrotaxane‐Based Hydrogels via Host–Guest Molecular Recognition

Advanced Functional Materials, EarlyView.
A mechanically programmable hydrogel for tissue engineering is developed by modulating the molecular threading density of poly(ethylene glycol) diacrylate‐β‐cyclodextrin (PEGDA‐β‐CD) polyrotaxane and combining it with β‐CD‐modified gelatin. The polyrotaxane‐guided transition from disordered pores to laminar microstructures enables precise tuning ...
Shiyi Chen, Xudan Xing, Haopu Su, Dominik Voll, Xiaohe Xu, Jiafeng Wan, Tongtong Cui, Christian W. Schmitt, Stefan Bräse, Peng Li, Patrick Théato   +10 more
wiley   +1 more source

Introduction to Fourier transforms

, 2001
The proof of all the standard Fourier transformations: Discrete Fourier Transform, Fourier Series, Discrete-Time Fourier Transform and Fourier Transform is presented here in very simple mathematics.
Berrig, O E
core