Results 81 to 90 of about 949,222 (276)

In Situ Profiling of Nanoscale Strains Uncovers Mechano‐Architectural Predictors of Aging and Osteoarthritis Emergence

Advanced Science, EarlyView.
In situ mechanical loading of osteoarthritis‐prone murine knee joints reveals that spatial alterations in subchondral plate microarchitecture precede cartilage loss and promote a shift from coordinated epiphyseal strain dissipation in healthy joints to focal subchondral strain concentration in osteoarthritis‐prone joints.
Aikta Sharma, Lucinda A. E. Evans, Lucie E. Bourne, Jishizhan Chen, Alissa L. Parmenter, Joseph Brunet, Kamel Madi, Sebastian Marussi, Andrew A. Pitsillides, Peter D. Lee, Katherine A. Staines   +10 more
wiley   +1 more source

A Rigid–Foldable Kirigami‐Inspired Metamorphic Mechanism With Programmable Motion Modes and Self‐Locking

Advanced Science, EarlyView.
Geometric constraint reconfiguration enables a rigid–foldable kirigami‐inspired mechanism to switch between twisting, directional translation, and self‐locking states. By encoding multifunctionality directly into its architecture, the mechanism achieves multimodal motion and passive locking without reassembly, providing a compact platform for adaptive ...
Jianlin Wang, Zhongmin Song, Ketao Zhang
wiley   +1 more source

尺寸偏差作用下角接触球轴承载荷分布研究

Jixie chuandong, 2014
The solution of load distribution of rolling element bearing is closely related to the calculation of some key performance indicators,such as load-carrying capacity,lubrication characteristics,fatigue life and so on.In view of dimension deviation of ...
周夕维, 徐华, 熊显智, 王琳
doaj  

Differential Tissue‐Coupled Powering for Battery‐Free Injectable Electroceuticals

Advanced Science, EarlyView.
A thread‐like injectable neural stimulator is powered through differential tissue‐coupled powering (DTCP), which harvests RF‐frequency tissue potentials with an elongated receiver while preserving a injectable cross‐section. The system integrates an ASIC, stimulation electrodes, and a portable transmitter, enabling wireless peripheral nerve stimulation,
Han Wu, Sultan Mahmud, Mali Halac, Asif Iftekhar Omi, Domenica Sofia Baez Rodas, Jeremiasz Dados, Chaojun Cheng, Anyu Jiang, Cameron Wallace, Anvi Singh, Erin Patrick, Baibhab Chatterjee, Shriya Srinivasan, Adam Khalifa   +13 more
wiley   +1 more source

A Calculation Method of Bearing Balls Rotational Vectors Based on Binocular Vision Three-Dimensional Coordinates Measurement

Sensors
The rotational speed vectors of the bearing balls affect their service life and running performance. Observing the actual rotational speed of the ball is a prerequisite for revealing its true motion law and conducting sliding behavior simulation analysis.
Wenbo Lu, Junpeng Xue, Wei Pu, Hongyang Chen, Kelei Wang, Ran Jia   +5 more
doaj   +1 more source

Robust Stitching Interface and Deep Learning Empowered Hydrogel Human‐Machine Interface

Advanced Science, EarlyView.
A molecular design strategy is presented that exploits synergistic carboxylate anion–quaternary ammonium interactions to simultaneously strengthen the hydrogel–PET interface and the bulk hydrogel network. Integrated with deep learning signal processing, the stable hydrogel–PET interface enables consistent signal acquisition and reliable human‐machine ...
Hao Dong, Yiming Luo, Chuanliu Liu, Mahamood Modupe Rasheedat, Wenjiayi Tan, Fangyu Zhao, Yixue Zhang, Chris Connor, Hua Hou, Hamdy Khamees Thabet, Ben Bin Xu, Huige Wei   +11 more
wiley   +1 more source

Reliability-Based Robust Design Optimization with Fourth-Moment Method for Ball Bearing Wear

Lubricants
Ball bearings operating at low speeds and under heavy loads are susceptible to wear failure, leading to significant economic losses. The existing reliability-based robust design optimization method of the fourth-moment method has high accuracy and does ...
Yanzhong Wang, Shiyuan E, Kai Yang, Bin Xie, Fengxia Lu   +4 more
doaj   +1 more source

Characterization of abnormal lubricant film pressure distribution mechanisms in pure sliding AISI52100 ball bearing contacts using sliding contact fatigue distribution and wear behaviour [PDF]

MATEC Web of Conferences
Ball bearings are a critical component of transmission systems whose operation depends on efficient lubrication. Moving surfaces in ball bearings are typically manufactured from AISI52100 martensitic steel material.
Masilela Sipho, Siyasiya Charles, Mostert Roelf   +2 more
doaj   +1 more source

Reversible Exfoliation‐Aggregation Dynamics in Ionic COFs for Tunable Interfacial Catalysis

Advanced Science, EarlyView.
A unique ionic covalent organic framework (I‐4) exhibits unprecedented concentration‐dependent dynamic behavior in water, undergoing reversible transitions between aggregation and exfoliation. This enables fully controllable, bidirectional modulation of its particle size and surface micro‐environment.
Jilu Yang, Xiaofei Zhang, Yue Li, Yuping Cao, Zhaowei Jia, Bo Li, Haitao Feng, Xiaoqiang Cui, Wenwu Qin   +8 more
wiley   +1 more source

Co‐simulations of induction machines coupled with a radial ball bearing for mechanical defects analysis

IET Electric Power Applications
In this paper, two co‐simulations are introduced to study the behaviour of a 2‐D finite‐element model and a magnetic equivalent model of an induction machine, both coupled with a mechanical radial ball bearing model.
Nada El Bouharrouti, Maksim Sitnikov, Ahmed Hemeida, Floran Martin, Karolina Kudelina, Muhammad U. Naseer, Anouar Belahcen   +6 more
doaj   +1 more source