Results 31 to 40 of about 996,599 (191)

Recent Advances in Laser‐Induced Graphene‐Based Gas Sensors: From Sensing Mechanisms to Biomedical Applications

Advanced Science, EarlyView.
Laser‐induced graphene (LIG) provides a scalable, laser‐direct‐written route to porous graphene architecture with tunable chemistry and defect density. Through heterojunction engineering, catalytic functionalization, and intrinsic self‐heating, LIG achieves highly sensitive and selective detection of NOX, NH3, H2, and humidity, supporting next ...
Md Abu Sayeed Biswas, Ankan Dutta, Shuvendu Das, Abu Musa Abdullah, Wanqing Zhang, Fatema Tuz Zohra, Huanyu Cheng   +6 more
wiley   +1 more source

Waveform Design of Zero Head DFT Spread Spectral Efficient Frequency Division Multiplexing

IEEE Access, 2017
Zero head discrete Fourier transform (DFT) spread spectral efficient frequency division multiplexing (ZH-DFT-s-SEFDM) as a non-orthogonal multicarrier transmission scheme is proposed for the bandwidth compressing. A zero head DFT spread approach consists
Min Jia, Zhisheng Yin, Qing Guo, Gongliang Liu, Xuemai Gu   +4 more
doaj   +1 more source

Efficient Screening of Organic Singlet Fission Molecules Using Graph Neural Networks

Advanced Science, EarlyView.
A high‐throughput screening framework based on graph neural networks (GNNs) and multi‐level validation facilitates the identification of singlet fission (SF) candidates. By efficiently predicting excitation energies across 20 million molecules, and integrating TDDFT calculations, synthetic accessibility assessments, and GW+BSE calculations, this ...
Li Fu, Longfei Lv, Fan Zhang, Si Zhou, Weiwei Gao, Jijun Zhao   +5 more
wiley   +1 more source

Low-Complexity Joint Phase Adjustment and Receive Beamforming for Directional Modulation Networks via IRS

IEEE Open Journal of the Communications Society, 2022
Intelligent reflecting surface (IRS) is a revolutionary and low-cost technology for boosting the spectrum and energy efficiencies in future wireless communication network. In order to create controllable multipath transmission in the conventional line-of-
Rongen Dong, Shaohua Jiang, Xinhai Hua, Yin Teng, Feng Shu, Jiangzhou Wang   +5 more
doaj   +1 more source

Engineering Large‐Grain Metal Halide Perovskite Films via Chemical Vapor Deposition for High‐Performance, Ultralow‐Noise Perovskite Photodetectors

Advanced Science, EarlyView.
Chemical vapor deposition produces large‐grain, phase‐pure CsPbBr3 films (grains up to 35 µm) with Drude‐like terahertz photoconductivity and twofold higher carrier mobility versus spin‐coated references. These microstructural advances translate into photodetectors with a detectivity of 8.4 × 1012 Jones, dark current below 1 pA cm−2, X‐ray sensitivity ...
Roel Vanden Brande, Sudipta Seth, Lei Gao, Bapi Pradhan, Dilkhush Khicher, Anastasiia Bazylevska, Wei Qu, Christian Sternemann, Hai Wang, Steven De Feyter, Weidong Xu, Fei Zhang, Mischa Bonn, Johan Hofkens, Elke Debroye   +14 more
wiley   +1 more source

Formation, Transformation, and Synergistic Interplay of Crystalline Orientation in Conjugated Polymers via Solution‐State Aggregation Control

Advanced Science, EarlyView.
Molecular engineering (i.e., tuning donors) and three film processing strategies (i.e., drop‐casting from different solvents, thermal and solvent vapor annealing, and blending) were synergistically utilized to tailor the solution‐state aggregation and thus the formation, transformation, and interplay of solid‐state crystalline orientation (face‐on and ...
Hao Zheng, Lixin Li, Yanan Guo, Bingjie Wu, Xuebing Luo, Hao Zhan, Yongjie Dong, Ze‐Fan Yao, Juan Peng, Jian Pei   +9 more
wiley   +1 more source

High‐Current‐Density Acidic CO2 Electroreduction to Formic Acid Enabled by Multiscale Microenvironment Regulation Over Defect‐Rich Sn/SnOx

Advanced Science, EarlyView.
Acidic CO2 electroreduction to formic acid is enabled by integrating mixed Sn/SnOx nanoclusters, K+‐regulated interfacial solvation, and Janus wettability. Coordinated control of active sites, interfacial water, and gas‐liquid transport suppresses hydrogen evolution and delivers approximately 85% HCOOH Faradaic efficiency at 400 mA cm−2.
Qiaoqi Guo, Bowen Jiang, Le Huang, Kunyu Jiang, Rongrong Tang, Qinong Zhu, Huajun Feng, Mengyang Fan, Yijing Xia   +8 more
wiley   +1 more source

Universal Linear Precoding for NBI-Proof Widely Linear Equalization in MC Systems

EURASIP Journal on Wireless Communications and Networking, 2007
In multicarrier (MC) systems, transmitter redundancy, which is introduced by means of finite-impulse response (FIR) linear precoders, allows for perfect or zero-forcing (ZF) equalization of FIR channels (in the absence of noise).
Donatella Darsena, Giacinto Gelli, Francesco Verde   +2 more
doaj   +1 more source

Geometry‐Encoded Soft Strain Sensing via Liquid‐Metal Transmission Lines

Advanced Science, EarlyView.
This study presents a liquid‐metal transmission‐line strain sensor that achieves intrinsic decoupling by encoding axial elongation into propagation delay. The time‐domain readout remains stable under complex off‐axis. This enables reliable, repeatable, real‐time elongation measurement in dynamic, multiaxial loading environments for wearable electronics,
Zhang Liu, Fengdeng Jin, Wenxuan Shi, Meng She, Ziqi Meng, Miao Fang, Yixin Zhang, Qianwen Dong, Wandi Yang, Lei Shi, Xujia Zhao, Feng Zhou, Bin Yao   +12 more
wiley   +1 more source

Diversity analysis of two-way MIMO relaying system based on zero-forcing [PDF]

, 2012
The two-way multiple-input and multiple-output relay system is investigated in this paper, where bi-directional communications between two source nodes are supported by a relay node with multiple antennas.
Xiang, Wei, Hang Long, Long, Hang, Liu, Hongmei, Shen, Shanshan, Hongmei Liu, Shanshan Shen, Wei Xiang   +7 more
core   +1 more source