Results 251 to 260 of about 326,649 (319)

An Inertial Proximal-Gradient Penalization Scheme for Constrained Convex Optimization Problems. [PDF]

Vietnam J Math, 2018
Boţ RI, Csetnek ER, Nimana N.
europepmc   +1 more source

Varifocal Meta‐Lens for Multifunctional Focusing and Imaging

Advanced Science, EarlyView.
A varifocal meta‐lens enables dynamic switching between conventional focusing and non‐diffracting autofocusing beams, relying on a phase design with dual interpretations in both real space and the spatial frequency domain. By integrating a Moiré‐based tuning mechanism, the system achieves continuous focal length control in both modes.
Rong Lin, Jin Yao, Chen Chen, Jiajun Wu, Junxiao Zhou, Zhihui Wang, Din Ping Tsai   +6 more
wiley   +1 more source

Efficient Convex Optimization for Energy-Based Acoustic Sensor Self-Localization and Source Localization in Sensor Networks. [PDF]

Sensors (Basel), 2018
Yan Y, Wang H, Shen X, Leng B, Li S.
europepmc   +1 more source

Stress–Strain Engineering with Lithium Solid Solution/Lithium Alloy Composite Anodes for Stable Lithium‐Metal Batteries

Advanced Science, EarlyView.
A Li−Ag/Li22Sn5 composite is explored as a Li‐metal anode. The Ag‐rich solid solution guides uniform Li⁺ deposition, while the Li22Sn5 scaffold confines volume expansion. Operando stress mapping reveals mitigated stress fluctuations and homogenized stress distribution, leading to enhanced electrochemical‐mechanical stability and prolonged cycling life.
Junjie Fu, Xiancheng Wang, Xiangrui Duan, Zihe Chen, Tiancheng Dong, Hengtao Shen, Chunhao Li, Renming Zhan, Yangtao Ou, Shiyu Liu, Yongming Sun   +10 more
wiley   +1 more source

Integrated Self‐Powered Sensors for Continuous Foot Health Monitoring via Laser‐Induced MXene‐Composited Graphene Hybrids From Lignocellulose

Advanced Science, EarlyView.
This study presents a high‐performance foot‐monitoring platform based on lignocellulose‐derived laser‐induced MXenecomposited graphene hybrids (LIG@MXene). The LIG@MXene exhibits markedly improved electrical conductivity, structural stability, and multifunctionality, enabling integrated energy harvesting, sensing, Joule heating, and supercapacitor ...
Peilong Zhao, Xiaofei Mao, Jiashu Song, Man Liu, Luxue Cui, Mingyang Liu, Nan Zhao, Jingqing Gao, Yuguang Zhou   +8 more
wiley   +1 more source

Super-Resolution of Magnetic Resonance Images via Convex Optimization with Local and Global Prior Regularization and Spectrum Fitting. [PDF]

Int J Biomed Imaging, 2018
Kawamura N, Yokota T, Hontani H.
europepmc   +1 more source

Decoupling Heat and Electrical Conduction in Bilayer Graphene Through Wrinkling‐Induced Phonon Hybridization

Advanced Science, EarlyView.
Measurements of wrinkled bilayer graphene reveal a strikingly inverse anisotropic relationship: thermal conductivity perpendicular to the wrinkles is lower than that parallel to the wrinkles, whereas electrical conductivity exhibits the opposite trend, highlighting the decoupling of thermal and electrical transport in wrinkled graphene.
Aoran Fan, Wenlong Dong, Xiaolong Yang, Ya Hu, Yufeng Zhang, Wu Li, Jun Lyu, Luqi Liu, Xing Zhang, Lin Yang   +9 more
wiley   +1 more source

Spatial and temporal regularization to estimate COVID-19 Reproduction Number R(t): Promoting piecewise smoothness via convex optimization

, 2020
Abry P, Pustelnik N, Roux S, Jensen P, Flandrin P, Gribonval R, Lucas C, Guichard E, Borgnat P, Garnier N, Audit B.   +10 more
europepmc   +1 more source

Ultra‐Sensitive and Linear Flexible Pressure Sensors with Tri‐Scale Graded Microstructures for Advanced Health Monitoring and Robotic Perception

Advanced Science, EarlyView.
A flexible piezoresistive sensor with a 3D tri‐scale graded microstructure is proposed, overcoming the trade‐off between sensitivity and linearity. The device achieves ultra‐high sensitivity (138.6 kPa−1), a broad linear range (400 kPa, R2 = 0.99), and exceptional stability (24 000 repeated loading cycles), enabling precise detection of physiological ...
Rui Chen, Chi Fai Cheung, Qixian Zhang, Tao Luo, Rui Gao, Wei Zhou, Chunjin Wang   +6 more
wiley   +1 more source