Results 71 to 80 of about 1,950,575 (284)

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

Software and Hardware Solutions for Channel Estimation based on Cyclic Golay Sequences [PDF]

Radioengineering, 2016
This paper presents channel estimation methods based on cyclic complementary Golay sequences. First, the conventional Golay correlator is investigated, then a frequency domain approach using Discrete Fourier Transform (DFT) is provided.
B. Csuka, Z. Kollar
doaj  

Deciphering Structure‐Bubble‐Mass Transfer Relationships in Water Electrolysis Through Electrode Morphology Regulation

Advanced Science, EarlyView.
Electrode morphology is shown to govern oxygen‐bubble dynamics and interfacial mass transfer during water electrolysis. Positive‐curvature nanoneedles promote rapid release of small bubbles, sustain electrolyte renewal, and minimize mass‐transport losses, whereas flat and concave architectures increasingly retain bubbles.
Zhiqing Tang, Ziyun Zhang, Huicun Gu, Baoxin Wu, Kejun Yan, Jiahui Luo, Yuting Jiang, Cailin Xiao, Yu Xu, Lin Zeng   +9 more
wiley   +1 more source

Discrete Fourier Transform and H∞ Approximation

, 1990
The discrete Fourier transform (DFT) has been used to obtain rational approximations for transfer functions of infinite-dimensional systems. Justification is provided in this note for the use of the DFT in such approximations.
Gu, Guoxiang, Wu, Neng Eva
core   +1 more source

Synergistic Integration of Fe–N4 Single‐Atom Sites and Directionally Aligned Electrode Architecture for High‐Performance Lithium–Sulfur Batteries

Advanced Science, EarlyView.
A directionally ice‐templated sulfur cathode integrated with atomically dispersed Fe–N4 catalytic sites is developed for high‐performance lithium–sulfur batteries. The structure–catalysis synergy accelerates Li+ transport and polysulfide conversion, leading to high sulfur utilization and stable long‐term cycling performance.
Lin Shen, Yijia Zou, Yuming Wang, Erya Gao, Christopher S. Allen, Tianyi Zhang, Stephen J. Skinner, Nigel P. Brandon, Chun Huang   +8 more
wiley   +1 more source

Sn‐Driven Grain Boundary Elimination for Single‐Crystalline Ni‐Rich Cathodes with Superior High‐Voltage Stability in Lithium‐Ion Batteries

Advanced Science, EarlyView.
A low‐temperature synthesis method of single‐crystalline NCA was successfully achieved by Sn doping, employing the same synthetic conditions as its polycrystalline counterparts. This synthesis was conducted at a temperature that was 150 °C lower than that required for synthesizing single‐crystalline NCA without Sn doping.
Guomeng Xie, Delai Qian, Ruiwu Li, Terence Xiaoteng Liu, Shun Lu   +4 more
wiley   +1 more source

Supramolecular Chiral Assemblies from Benzoselenadiazole‐Alanine‐Acylhydrazone Conjugates Enable Cardioprotection

Advanced Science, EarlyView.
The C3‐symmetric conjugate TASe, which integrates benzoselenadiazole, alanine, and acylhydrazone modules, self‐assembles into a chalcogen‐/hydrogen‐bonded porous framework in the solid state and uniform chiral nanospheres in aqueous media. These assemblies protect cardiomyocytes from doxorubicin‐induced oxidative injury by scavenging intracellular ...
Jinkui Teng, Renjing Yang, Yu Du, Jingzhong Duan, Yiming Xu, Zhihua He, Guanghui Wang, Wenjing Tian, Aijie Liu, Haifeng Chen, Yun‐Bao Jiang, Xiaosheng Yan   +11 more
wiley   +1 more source

Experimental Research on Adaptive 128/64QAM DFT-Spread IFFT/FFT Size Efficient OFDM With a High SE in VLLC System

IEEE Photonics Journal, 2017
In this paper, an adaptive inverse fast Fourier transform and fast Fourier transform (IFFT/FFT) size efficient orthogonal frequency division multiplexing (OFDM) modulation scheme with 128/64-quadrature amplitude modulation (QAM) and ...
Qinghui Chen, Jing He, Rui Deng, Ming Chen, Fangliu Zhang, Min Dai, Fengting Long, Lin Chen   +7 more
doaj   +1 more source

Topological Quantum Biomaterials Enable Pyroptosis‐Senescence Coupling for Enhanced Colorectal Cancer Therapy

Advanced Science, EarlyView.
This work reports conceptually unprecedented topological quantum biomaterials derived from engineered Pd3Sn nanostrips for oncological applications. Their near‐Fermi‐level electronic architecture and superior interfacial charge transport facilitate ultrasound‐amplified redox reactions and efficient ROS generation.
Zilu Chen, Kun Mei, Yan Yang, Mengna Xu, Xinyue Dai, Renjun Gu, Fuqiong Zhou, Cheng Wang, Meiqi Chang, Yan Huang, Yu Chen   +10 more
wiley   +1 more source

Introduction to the discrete Fourier series considering both mathematical and engineering aspects - A linear-algebra approach

Cogent Education, 2015
The discrete Fourier series is a valuable tool developed and used by mathematicians and engineers alike. One of the most prominent applications is signal processing.
Ludwig Kohaupt
doaj   +1 more source