Results 61 to 70 of about 3,330 (300)

Synchronously Predicting Tea Polyphenol and Epigallocatechin Gallate in Tea Leaves Using Fourier Transform–Near-Infrared Spectroscopy and Machine Learning

Molecules, 2023
Tea polyphenol and epigallocatechin gallate (EGCG) were considered as key components of tea. The rapid prediction of these two components can be beneficial for tea quality control and product development for tea producers, breeders and consumers.
Sitan Ye, Haiyong Weng, Lirong Xiang, Liangquan Jia, Jinchai Xu   +4 more
doaj   +1 more source

MODULATION AND PARSEVAL’S THEOREM FOR DISTRIBUTIONAL TWO DIMENSIONAL FOURIER-MELLIN TRANSFORM

, 2016
The Mellin transform is an integral transform that may be regarded as the multiplicative version of the two-sided Laplace transform and the Fourier transform is a reversible, linear transform with many important properties.
V. D. Sharma, P. D. Dolas
core   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

An Improved Local Gradient Method for Sea Surface Wind Direction Retrieval from SAR Imagery

Remote Sensing, 2017
Sea surface wind affects the fluxes of energy, mass and momentum between the atmosphere and ocean, and therefore regional and global weather and climate.
Lizhang Zhou, Gang Zheng, Xiaofeng Li, Jingsong Yang, Lin Ren, Peng Chen, Huaguo Zhang, Xiulin Lou   +7 more
doaj   +1 more source

Weighted inequalities for Hilbert transforms and multiplicators of Fourier transforms

Journal of Inequalities and Applications, 1997
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
A. Meskhi, V. Kokilashvili
openaire   +4 more sources

A State‐Adaptive Koopman Control Framework for Real‐Time Deformable Tool Manipulation in Robotic Environmental Swabbing

Advanced Robotics Research, EarlyView.
This work presents a state‐adaptive Koopman linear quadratic regulator framework for real‐time manipulation of a deformable swab tool in robotic environmental sampling. By combining Koopman linearization, tactile sensing, and centroid‐based force regulation, the system maintains stable contact forces and high coverage across flat and inclined surfaces.
Siavash Mahmoudi, Amirreza Davar, Dongyi Wang   +2 more
wiley   +1 more source

Classification of artificially aged lentil seeds using Fourier transform near-infrared spectroscopy

Pesquisa Agropecuária Tropical
Seed deterioration is among the main causes of loss in physiological potential. This study aimed to investigate the potential of Fourier transform near-infrared (FT-NIR) spectroscopy to classify lentil seeds subjected to artificial aging at 41 ºC and 100
Marcelo Augusto Rocha Limão, Daniel Teixeira Pinheiro, André Dantas de Medeiros, João Paulo Oliveira Ribeiro, Denise Cunha Fernandes dos Santos Dias, Laércio Junio da Silva   +5 more
doaj   +1 more source

Mid-infrared Spectroscopy for Rapid Determination of Key Component Contents in Anji Golden Flower Tea during Eurotium cristatum Fermentation [PDF]

Shipin Kexue
To enhance the utilization of pruned leaves from Anji white tea and to achieve rapid detection and quantitative analysis of key quality components in fermented tea, Eurotium cristatum was inoculated to pruned leaves of Anji white tea to prepare Anji ...
ZHAO Shiru, HUANG Pujie, LI Xianxiu, MAO Yangchen, WANG Zhenzhen, MAO Jianwei, SHA Ruyi, SHAO Yihuai
doaj   +1 more source

Solid Harmonic Wavelet Bispectrum for Image Analysis

Advanced Science, EarlyView.
The Solid Harmonic Wavelet Bispectrum (SHWB), a rotation‐ and translation‐invariant descriptor that captures higher‐order (phase) correlations in signals, is introduced. Combining wavelet scattering, bispectral analysis, and group theory, SHWB achieves interpretable, data‐efficient representations and demonstrates competitive performance across texture,
Alex Brown, Mathilda Avirett‐Mackenzie, Carolin Villforth, Georgios Exarchakis   +3 more
wiley   +1 more source

Relations Between Uniformly Almost Periodic Functions and the Fourier Transform [PDF]

, 2022
With this work, we intend to study the relation between uniformly almost periodic func- tions and the Fourier transform. To this end, we start by defining the concept of a uni- formly almost periodic function and we study several important algebraic ...
Araújo, Gonçalo Gomes
core