Results 91 to 100 of about 1,921,662 (293)

Multiplicative complexity of the two-dimensional discrete Fourier transform DFT (2 ⁿ ; 2)

Electronics Letters, 1988
The authors extend known results of multiplicative complexity from Winograd, Auslander, Heideman, etc. to the two-dimensional discrete Fourier transform \(DFT(2^ n,2)\). They show that the \(DFT(2^ n,2)\) can be transformed into a series of distinct second versions of the discrete cosine transform (DCT).
Ma, W., Yang, D.
openaire   +1 more source

Theory and realization of novel algorithms for random sampling in digital signal processing [PDF]

, 1996
Random sampling is a technique which overcomes the alias problem in regular sampling. The randomization, however, destroys the symmetry property of the transform kernel of the discrete Fourier transform.
Lo, King Chuen
core  

Bidirectional Soft Catalysts for Improved Power Performance of Li‐S Batteries

Advanced Science, EarlyView.
A soft polymer‐metal catalyst is integrated into the binder to create a catalytically active microenvironment that accelerates bidirectional sulfur redox kinetics in lithium‐sulfur batteries. A model polyvinyl alcohol‐Cu catalyst enables high areal capacities at demanding current densities and stable cycling in pouch‐cell prototypes at 0.5 C, achieving
Maleesha M. Nishshanke, Petar Jovanovic, Swarit Dwivedi, Declan McNamara, Akshat Tanksale, Mahdokht Shaibani, Matthew Hill, Mainak Majumder   +7 more
wiley   +1 more source

Spectrum analysis of digital UPWM signals generated from random modulating signals

Scientific Reports
This work studies the spectrum of discrete-time Uniform-sampling pulse width modulation (UPWM) signals originating from stochastic input signals. It demonstrates that for ergodic input sequences of independent and identically distributed random variables,
Konstantinos Kaleris, Emmanouil Psarakis, John Mourjopoulos   +2 more
doaj   +1 more source

Elastomeric Core‐Conductive Shell Slurry Additive Stabilizes High‐Voltage NCM811 Cathodes via Mechanical‐Electrical Dual Regulation

Advanced Science, EarlyView.
A core‐shell ASA slurry additive constructs a mosaic‐like interface on high‐voltage NCM811 cathodes. This architecture decouples interfacial functions: the elastomeric core buffers mechanical stress to prevent microcracking, while the conductive shell facilitates rapid ion/electron transport, enabling mechanical‐electrical dual regulation and enhanced ...
Jiamin Duan, Xingchen Liu, Jiapei Li, Zhuijun Xu, Said Amzil, Baohu Wu, Yiyao Xiao, Wenjun Zhang, Tong Yu, Xiaohong Li, Wenwen Xue, Xiangyu Chen, Changwei Liu, Jie Gao, Peter Müller‐Buschbaum, Ya‐Jun Cheng, Yonggao Xia   +16 more
wiley   +1 more source

DCT/DST-based frequency modulated-OFDM

ICT Express
Among the recent advancements in waveform design for wireless communication, the frequency-modulated orthogonal frequency-division multiplexing (FM-OFDM) has gained attention due to its resilience to phase noise and Doppler spread, as well as its zero-dB
Gosan Noh, Wooram Shin, Kyeongpyo Kim, Eunkyung Kim   +3 more
doaj   +1 more source

Efficient and Secure Outsourcing of DFT, IDFT, and Circular Convolution

IEEE Access, 2019
Discrete Fourier transform (DFT), inverse DFT (IDFT), and circular convolution are important tools for analyzing and designing discrete signals and systems, and are widely used in various industries.
Xiangli Xiao, Junjian Huang, Yushu Zhang, Xing He   +3 more
doaj   +1 more source

Programmable Guest‐Induced 5‐Phase‐Transition Topological Reconstructions of Cobalt Formate Metal–Organic Frameworks

Advanced Science, EarlyView.
A reversible five‐phase topological cycle is achieved in a minimalist cobalt formate metal–organic framework. The amorphous phase functions as a programmable reactive hub, selectively reconstructing into four distinct crystalline architectures through cationic templates, humidity, or CO2.
Zhiyu Tao, Jingjian Li, Jing Ling, Tianxiang Chen, Wing‐Yiu Yu, Cong Lin, Tsz Woon Benedict Lo   +6 more
wiley   +1 more source

Defect‐Rich CoNi Prussian Blue Analogues Enable Highly Selective Electrochemical Hydrogen Peroxide Production

Angewandte Chemie, EarlyView.
Introducing [Co(CN)6]3− defects into CoNi Prussian Blue analogues exposes square‐planar Ni–N4 active sites, leading to remarkable H2O2 selectivity during the electrochemical oxygen reduction reaction in alkaline media. ABSTRACT Decentralized electrosynthesis of hydrogen peroxide (H2O2) via the two‐electron oxygen reduction reaction (2e− ORR) offers a ...
Kai Sun, Yu Mao, Yongfang Zhou, Ziyun Wang, Geoffrey I. N. Waterhouse   +4 more
wiley   +2 more sources

Designer Moiré Quantum Materials Enabled by Freestanding Oxide Membranes in Twisted and Hybrid Bilayers

Advanced Science, EarlyView.
Freestanding oxide membranes transform twistronics by enabling deterministic stacking, strain release, and integration with two‐dimensional materials. A unified framework links local atomic registry to structural reconstruction, polar textures, charge modulation, flat bands, and magnetic responses, while identifying the fabrication and characterization
Puneet Kaur, Rahul, Jan‐Chi Yang
wiley   +1 more source