Results 101 to 110 of about 1,381,071 (297)

Design of Excitation Circuit for Logging While Drilling Ultrasonic Array Logging Tool

Cejing jishu
Through the wellbore reflection characteristics obtained by ultrasonic array logging tool while drilling, the wellbore profile is studied in real time, and the fractured formation information is obtained.
WANG Yining, TAN Baohai, SU Yuanda, ZHANG Kai, WANG Zhichen, LING Zichen   +5 more
doaj   +1 more source

A Numerical–Experimental Approach for Multi‐Matrix Fiber‐Reinforced Plastics Characterization Using Finite Element Model Updating

Advanced Engineering Materials, EarlyView.
A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora, Tales V. Lisbôa, Axel Spickenheuer, Rogério J. Marczak, Jakson M. Vassoler   +4 more
wiley   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Symmetry‐Guided Multifunctional Acoustic System Based on Mechanically Actuated Sonic Crystals

Advanced Engineering Materials, EarlyView.
This study presents the design, simulation, and experimental validation of amultifunctional acoustic metamaterial based on rotationally engineered sonic crystals.By tuning cylinder orientations, controllable band gaps and six distinct functionalities—including switching, topological insulation, beam splitting, and logic operations—areachieved ...
Yuanyan Zhao, Sriram Subramanian, Gianluca Memoli   +2 more
wiley   +1 more source

Excitation-Dependent Multiple Fluorescence of a Substituted 2‑(2′-Hydroxyphenyl)benzoxazole

, 2018
Excitation-dependent multiple fluorescence of a 2-(2′-hydroxyphenyl)­benzoxazole (HBO) derivative (1) is described. Compound 1 contains the structure of a charge-transfer (CT) 4-hydroxyphenylvinylenebipy fluorophore and an excited-state intramolecular ...
Lei Zhu (16642), Zhao Yuan, Kesavapillai Sreenath, Kesavapillai Sreenath (2041921), Joseph J. M. Hurley, Ali H. Younes, Quinton J. Meisner, Zhao Yuan (547890), Joseph J. M. Hurley (5978486), Quinton J. Meisner (4922458), Ali H. Younes (1589731), Lei Zhu   +11 more
core   +1 more source

Dynamics Modeling of a Rigid–Flexible Coupled Flapping-Wing Robot and Diffeomorphism-Based Disturbance Rejection Attitude-Constrained Control

Aerospace
Lightweight flapping-wing robots are affected by structural flexibility, wind disturbances, and static friction in basal passive joints during perching and attitude-holding tasks.
Guang Rong, Jingyuan Yang, Jinbao Chen, Jian Wang, Jianyuan Wang   +4 more
doaj   +1 more source

High‐Resolution Corrosion Fingerprinting of Alloy Libraries via Microdroplet Spectroelectrochemistry

Advanced Engineering Materials, EarlyView.
Ionic‐liquid microdroplet spectroelectrochemistry enables stable, localized electrochemical measurements over extended timescales. By coupling impedance spectroscopy, wetting analysis, finite‐element simulations, and operando Raman spectroscopy, it disentangles geometrical and electrochemical effects, opening new opportunities for rapid corrosion ...
Ekaterina Kurchavova, Oumaïma Gharbi, Mireille Turmine, Vincent Vivier   +3 more
wiley   +1 more source

Developing a sorting code for Coulomb excitation data analysis [PDF]

, 2015
>Magister Scientiae - MScThis thesis aims at developing a sorting code for Coulomb excitation studies at iThemba LABS. In Coulomb excitation reactions, the inelastic scattering of the projectile transfers energy to the partner nucleus (and vice-versa)
Mehl, Craig
core   +1 more source

Adaptive Foam 3D Printing of Ultralight and Multifunctional Materials

Advanced Engineering Materials, EarlyView.
Adaptive foam 3D printing, enabled by expandable microspheres, imparts cellular structures to thermoplastic and thermosetting polymers, manufactured through a variety of processes including fused filament fabrication, direct ink writing, digital light processing, and inkjet printing.
Nariman Rajabifar, Amir Ameli
wiley   +1 more source

Graphene-based flexible SERS substrates with Ag nanohole structures for biochemical sensing

Next Nanotechnology
Flexible substrates for surface-enhanced Raman spectroscopy (SERS) are essential for practical applications, such as point-of-care testing, wearable sensing, and environmental analysis that require high sensitivity, portability, and mechanical ...
Takashi Uchino, Yanjun Heng, Ryoma Kumagai, Shigenobu Kasai, Chao Tang, Hirokazu Fukidome, Akira Satou, Taiichi Otsuji, Shuji Ikeda   +8 more
doaj   +1 more source