Results 121 to 130 of about 744,050 (371)

Discussion on Weighted Fractional Fourier Transform and Its Extended Definitions

Fractal and Fractional
The weighted fractional Fourier transform (WFRFT) has always been considered a development of the discrete fractional Fourier transform (FRFT). This paper points out that the WFRFT is a discrete FRFT of eigenvalue decomposition, which will change the ...
Tieyu Zhao, Yingying Chi
doaj   +1 more source

Dynamic Networks via Polymerizable Deep Eutectic Monomers for Uniform Li+ Transport at Interfaces in Lithium Metal Batteries

Advanced Functional Materials, EarlyView.
The PDEM‐based SIGPE provides a dynamic nanophase from Li+‐bridged molecular self‐association, enhancing electrochemical stability and facilitating uniform Li+ ion flux at the interface. This unique solvation structure results in a hetero species‐driven inorganic‐rich SEI and long‐term cycle stability, suggesting that a PFAS‐free Li+‐containing monomer
Susung Yun, Seonho Kim, Puji Lestari Handayani, Sungyeb Jung, Jae Hyun Park, U Hyeok Choi   +5 more
wiley   +1 more source

Synchroextracting Transform Based on the Novel Short-Time Fractional Fourier Transform

Fractal and Fractional
As a generalization of the short-time Fourier transform (STFT), the novel short-time fractional Fourier transform (NSTFRFT) has been introduced recently.
Bei Li, Zhuosheng Zhang
doaj   +1 more source

Fractional Radon Transform and its Convolution Theorem [PDF]

, 2019
Fractional Radon transform which is symbolized with the notation , it is different to the classical Radon transform. The shift property of fractional Radon transform is controlled by the fractional order Rotation of the input object at angle  will ...
Abdul Rehman, Abdul Rehman, Ali, Hazrat, Iqbal, Saleem, Kakar, Saboor Ahmed, Sarwar, Farhana   +4 more
core   +1 more source

Supercompliant Lattice Boosts n‐type AgSbTe2 Thermoelectrics

Advanced Functional Materials, EarlyView.
The supercompliant lattice design enables the first realization of n‐type electrical transport in AgSbTe2 by overcoming intrinsic electron‐killer defects and exceeding the doping limits imposed by the conventional Hume–Rothery rule. Accordingly, the best performance n‐type Ag0.8Na0.3Sb0.6Bi0.4Te2 sample achieves a low κ of 0.27 W·m−1·K−1 that ...
Ruoyan Li, Shuai Han, Chunyu Zhang, Suyao Liu, Wen Yin, Yuanguang Xia, Pengfei Liu, Zhen‐Hua Ge, Dongyao Zhao, Bingchao Yang, Lulu Huang, Zhi Zhang, Yongsheng Zhang, Yuan Yu, Bangzhi Ge, Chongjian Zhou   +15 more
wiley   +1 more source

Modified Local Whittle Estimation of the Memory Parameter in the Nonstationary Case [PDF]

Semiparametric estimation of the memory parameter is studied in models of fractional integration in the nonstationary case, and some new representation theory for the discrete Fourier transform of a fractional process is used to assist in the analysis. A
Katsumi Shimotsu, Peter C.B. Phillips
core  

Optical Control of Ferroelectric Imprint in BiFeO3

Advanced Functional Materials, EarlyView.
Above‐bandgap irradiation at room temperature enables on‐demand optical control of defect‐driven built‐in electric fields in BiFeO₃ thin films, fabricated via scalable, chemical spray pyrolysis. These fields, otherwise “frozen‐in,” can cause severe device degradation, including non‐switchable polarization, dead layers near interfaces, and polarization ...
Haoze Zhang, Malur C. Nagashree, Richard F. Webster, Zhipeng Wang, Xiaoran Zheng, Suresh D. Kulkarni, Rajendra B. Venkataramana, Jan Seidel, Pankaj Sharma   +8 more
wiley   +1 more source

A novel algorithm to get the Fourier power spectra of a real sequence [PDF]

arXiv, 2019
For a real sequence of length of m = nl, we may deduce its congruence derivative sequence with length of l. The discrete Fourier transform of original sequence can be calculated by the discrete Fourier transform of the congruence derivative sequence. Based on the relation of discrete Fourier transforms between the two sequences, the features of Fourier
arxiv  

Signal recovery from partial fractional fourier domain information and pulse shape design using iterative projections [PDF]

, 2005
Cataloged from PDF version of article.Signal design and recovery problems come up in a wide variety of applications in signal processing. In this thesis, we first investigate the problem of pulse shape design for use in communication settings with ...
Güven, H Emre
core  

Fractional Fourier transforms and their optical implementation II [PDF]

, 1993
Haldun M. Özaktaş, David Mendlovic
openalex   +1 more source