Results 51 to 60 of about 14,285 (229)

Soft Magnetic Sensor Array for Amphibious Measurement of 3D Muscle Deformation Distribution for Human Motion Recognition

Advanced Intelligent Systems, EarlyView.
This article develops a soft magnetic sensor array to extract 3D and distributional muscle deformations, which has highly consistent measurements in amphibious environments, robustness to hydraulic pressure, and about 200 ms faster response than an inertial measurement unit, achieving over 98% classification accuracy and below 3% phase estimation ...
Yuchao Liu, Zihan Chen, Chuxuan Guo, Zijie Liu, Yibin Chen, Xuan Wu, Zhuo Li, Qining Wang, Jiajie Guo   +8 more
wiley   +1 more source

The formation of CDM haloes I: Collapse thresholds and the ellipsoidal collapse model

, 2014
In the excursion set approach to structure formation initially spherical regions of the linear density field collapse to form haloes of mass $M$ at redshift $z_{\rm id}$ if their linearly extrapolated density contrast, averaged on that scale, exceeds ...
Aaron D. Ludlow, Angrick, Bailin, Bardeen, Behroozi, Bett, Bond, Bond, Catelan, Catelan, Chandrasekhar, Cole, Cristiano Porciani, Dalal, Despali, Despali, Doroshkevich, Eisenstein, Eke, Elia, Hahn, Hahn, Heavens, Icke, Kauffmann, Kellogg, Komatsu, Lacey, Lee, Lemson, Li, Lin, Ludlow, Ludlow, Lynden-Bell, Mikolaj Borzyszkowski, Mo, Mo, Peebles, Pillepich, Porciani, Porciani, Press, Robertson, Sheth, Sheth, Sheth, Sheth, van den Bosch, Wang, Watanabe, White, White   +52 more
core   +1 more source

Three Synchronized, Miniaturized, Wireless Inertial Measurement Unit Sensors for Automated Gait and Balance Analysis System

Advanced Intelligent Systems, EarlyView.
This study presents a compact, three IMU wearable system that enables accurate motion capture and robust gait‐feature extraction, thereby supporting reliable machine learning‐based balance evaluation. Accurate assessment of balance is critical for fall prevention and targeted rehabilitation, particularly in older adults and individuals with ...
Seok‐Hoon Choi, Ki‐Hoon Kim, Heung Jin Park, Yuna Kim, Hyunjin Lee, Yu Bin Lee, Youn Joung Kang, Sungchul Huh, Min‐Ho Seo   +8 more
wiley   +1 more source

Effect of true triaxial principal stress unloading rate on strain energy density of sandstone

Scientific Reports
Deep rock are often in a true triaxial stress state. Studying the impacts of varying unloading speeds on their strain energy (SE) density is highly significant for predicting rock stability.
Zhixi Liu, Guangming Zhao, Xiangrui Meng, Qingheng Gu   +3 more
doaj   +1 more source

Anisotropic characteristics and creep model for thin-layered rock under true triaxial compression

Journal of Rock Mechanics and Geotechnical Engineering
The failure phenomenon of thin-layered rock tunnels not only exhibits asymmetric spatial characteristics, but also significant time-dependent characteristics under high in-situ stress, which is attributed to the time-dependent fracture of thin-layered ...
Tianxiang Song, Xia-Ting Feng, Yangyi Zhou, Chengxiang Yang, Xiaojun Yu   +4 more
doaj   +1 more source

Three-dimensional FDEM numerical simulation of failure processes observed in Opalinus Clay laboratory samples

Journal of Rock Mechanics and Geotechnical Engineering, 2014
This study presents the first step of a research project that aims at using a three-dimensional (3D) hybrid finite-discrete element method (FDEM) to investigate the development of an excavation damaged zone (EDZ) around tunnels in a clay shale formation ...
Omid Mahabadi, Patrick Kaifosh, Paul Marschall, Tim Vietor   +3 more
doaj   +1 more source

A generalized nonlinear three-dimensional failure criterion based on fracture mechanics

Journal of Rock Mechanics and Geotechnical Engineering, 2023
Based on fracture mechanics theory and wing crack model, a three-dimensional strength criterion for hard rock was developed in detail in this paper. Although the basic expression is derived from initiation and propagation of a single crack, it can be ...
Zhaofeng Wang, Pengzhi Pan, Jianping Zuo, Yaohui Gao   +3 more
doaj   +1 more source

Experimental artefacts in undrained triaxial testing [PDF]

, 2010
For evaluation of the undrained thermo-poro-elastic properties of saturated porous materials in conventional triaxial cells, it is important to take into account the effect of the dead volume of the drainage system.
Ghabezloo, Siavash, Sulem, Jean
core   +3 more sources

TacEva: A Performance Evaluation Framework for Vision‐Based Tactile Sensors

Advanced Intelligent Systems, EarlyView.
This work introduces TacEva, a unified framework for evaluating vision‐based tactile sensors. It standardizes intrinsic, performance, and robustness metrics through shared experimental procedures and links them to task‐level requirements in robotic manipulation.
Qingzheng Cong, Steven Oh, Wen Fan, Shan Luo, Kaspar Althoefer, Dandan Zhang   +5 more
wiley   +1 more source

Experimental study of the end effect on the mechanical behaviors of rocks under true 3D compressions

Energy Science & Engineering
In true triaxial compression tests, all three principal stresses are imposed independently. This allows for a more comprehensive analysis of the material's mechanical properties.
Junchao Chen, Zhenglu Che, Meiben Gao, Liang Zhang, Zhonghui Shen   +4 more
doaj   +1 more source