Results 101 to 110 of about 521,797 (371)

The Periodogram of fractional processes. [PDF]

We analyse asymptotic properties of the discrete Fourier transform and the periodogram of time series obtained through (truncated) linear filtering of stationary processes.
Velasco, Carlos
core  

Alginate‐Sludge Derived Biochar‐Calcium Hydrogel for Phosphate Removal and Slow‐Release Fertilizer: A Sustainable and Multifunctional Solution

Advanced Functional Materials, EarlyView.
An alginate‐based biochar hydrogel (ABC‐hydrogel), derived from sewage sludge, is developed for simultaneous phosphate removal and agricultural reuse. It captures phosphorus from water and gradually releases it as fertilizer, enhancing lettuce growth.
Yu Zhang, Baile Wu, Haoran Dong, Xiaohong Guan, Irene M. C. Lo   +4 more
wiley   +1 more source

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  

Fast‐Responding O2 Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks (MOF‐76)

Advanced Functional Materials, EarlyView.
Luminescent MOF‐76 materials based on Eu(III) and mixed Eu(III)/Y(III) show rapid and reversible changes in emission intensity in response to O2 with very short response times. The effect is based on triplet quenching of the linker ligands that act as photosensitizers. Average emission lifetimes of a few milliseconds turn out to be mostly unaffected by
Zhenyu Zhao, Christian Weinberger, Jakob Steube, Matthias Bauer, Martin Brehm, Michael Tiemann   +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 Fokker-Planck Equation for Fractal Media

, 2006
We consider the fractional generalizations of equation that defines the medium mass. We prove that the fractional integrals can be used to describe the media with noninteger mass dimensions.
Forster D., Isihara A., Kolmogorov A. N., Levy P. P., Mandelbrot B., Resibois P., Samko S. G., Samko S. G., Schroeder M., Tarasov V. E., Tarasov V. E., Vasily E. Tarasov, Zaslavsky G. M.   +12 more
core   +1 more source

Quaternionic Fractional Fourier Transform for Boehmians

Ukrainian Mathematical Journal, 2020
UDC 517.9 We construct a Boehmian space of quaternion valued functions using the quaternionic fractional convolution. Applying the convolution theorem, the quaternionic fractional Fourier transform is extended to the context of Boehmians and its properties are established.
openaire   +2 more sources

2D Phosphorene‐Decorated Ni‐Rich Layered Cathodes for High‐Power and High‐Energy Li‐Ion Batteries

Advanced Functional Materials, EarlyView.
A conformal coating of 2D phosphorene nanosheets is decorated on Li[Ni0.8Co0.1Mn0.1]O2 cathodes to enhance fast charge–discharge performance and structural stability under high mass loading and low carbon content. As a result, it exhibits improved power capability, cycle stability, and suppressed structural degradation, offering a promising strategy ...
Jihoe Lee, Kijeong Nam, Bonyoung Ku, Myungeun Choi, Min‐kyung Cho, Su Yeon Jung, Jinhong Min, Jinho Ahn, Yongseok Lee, Sang‐Yeop Lee, Dohyun Lee, Yun Seong Cho, Da‐Sol Kwon, Jung‐Keun Yoo, Joohoon Kang, Jongsoon Kim   +15 more
wiley   +1 more source

Discrete Fourier Transforms of Fractional Processes [PDF]

Discrete Fourier transforms (dft's) of fractional processes are studied and an exact representation of the dft is given in terms of the component data. The new representation gives the frequency domain form of the model for a fractional process, and is ...
Peter C.B. Phillips
core  

SAR-Based Vibration Estimation Using the Discrete Fractional Fourier Transform [PDF]

, 2012
A vibration estimation method for synthetic aperture radar (SAR) is presented based on a novel application of the discrete fractional Fourier transform (DFRFT).
Atwood, Tom, Beach, Ryan J., Doerry, Armin W., Dunkel, Ralf, Gerstle, Walter, Hayat, Majeed M., Pepin, Matthew, Santhanam, Balu, Wang, Qi   +8 more
core   +1 more source