Results 111 to 120 of about 949,222 (276)

Experimental Study on the Non-Smooth Behavior of Cage-Less Ball Bearings with Localized Functional Grooves

Machines
To investigate the non-smooth behaviour of cage-less ball bearings with localised functional grooves, this article first designs temperature-varying comparative experiments and rolling element discrete performance test protocols.
Jingwei Zhang, Enwen Zhou, Yibo Wang, Qiyin Lv, Yuan Zhang   +4 more
doaj   +1 more source

Beyond‐Classical Ferroelectric Metamaterials: 3D‐Printed Planar Lattices With Programmable Electro–Thermo–Mechanical Coupling

Advanced Science, EarlyView.
Planar ferroelectric lattices with rationally‐tailored topology and polarization achieve programmable piezoelectric and pyroelectric properties. Analytical modeling, homogenization, and experiments collectively demonstrate enhanced and tunable longitudinal, transverse, and shear piezoelectric responses, together with substantially improved ...
Jiahao Shi, Kang Ju, Haoyu Chen, Valerie Orsat, Agus P. Sasmito, Ali Ahmadi, Abdolhamid Akbarzadeh   +6 more
wiley   +1 more source

On the Friction of the Ball Bearing

Journal of the Society of Mechanical Engineers, 1944
SASAKI, Tokio, ONO, Sigeru, SANJO, Tutomu   +2 more
openaire   +2 more sources

Concentration of the distance between points in the unit ball [PDF]

, 1998
We prove that in every finite dimensional normed space, for “most” pairs (x, y) of points in the unit ball, ║x − y║ is more than √2(1 − ε). As a consequence, we obtain a result proved by Bourgain, using QS-decomposition, that guarantees an exponentially ...
Villa, R, Ball, KM
core  

MN•CS•IO System: Cross‐Species Study for HBB Function in High‐Altitude Hypoxia Adaptation

Advanced Science, EarlyView.
We developed an integrative mesh‐nanorod sorting, chitosan nanoparticle delivery, and intraosseous injection (MN•CS•IO) system to investigate HBB in high‐altitude hypoxia adaptation. Transplanting Tibetan animals' HBB‐modified Lin‐ cells into mice achieved 95.59% transfection efficiency and 8.15% HBB expression. High‐altitude HBB recipients upregulated
Wenqiao Hui, Lin Mao, Binggang Li, Hanyue Kang, Zhengquan Tang, Sheng Chen, Hui Yang, Yu Qiao, Huiqian Ding, Yuhuan Wang, Min Li, Junjie Hu, Shoudong Ye, Xin Wang, Xiaobin Xu, Yupeng Wang, Tana Wuren, Qian Ban, Baowei Zhang   +18 more
wiley   +1 more source

Failure Analysis of Outer Ring Fracture of Floating Bearing

Jixie chuandong, 2020
The main drive growth box of high speed wire finishing mill adopts the structure of cylindrical roller bearing and deep groove ball bearing as the support of gear shaft.
Xiaolu Zhu
doaj  

Vine‐Inspired Soft Robotics: Materials, Actuations, and Emerging Applications

Advanced Science, EarlyView.
Vine‐inspired robots grow from the tip, enabling navigation through confined spaces with minimal disturbance. This Review summarizes material and actuation strategies for vine‐inspired growth, key functions including steering, retraction, attachment, branching, and variable stiffness, and emerging applications spanning medical intervention, confined ...
Jiahao Wu, Xingyun Liu, Fangzhou Wang, Huili Ren, Chaojun Zhang, Ziyu Ren, Zunqi Liu, Jing Li   +7 more
wiley   +1 more source

Conceptualising quality early childhood education: Learning from young children in Brazil and South Africa through creative and play‐based methods

British Educational Research Journal, EarlyView., 2023
Abstract Early childhood has increasingly been acknowledged as a vital time for all children. Inclusive and quality education is part of the United Nations Sustainable Development Goals, with the further specification that all children have access to quality pre‐primary education.
Laura H. V. Wright, Irene Rizzini, Malibongwe Gwele, Lynn McNair, Cristina Laclette Porto, Marsha Orgill, E. Kay M. Tisdall, Malcolm Bush, Linda Biersteker   +8 more
wiley   +1 more source

Research of the Influence of Bearing Clearance on the Transmission Efficiency of Gearbox

Jixie chuandong, 2018
For the problem that the friction power loss of the deep groove ball bearing will directly affect the transmission efficiency of the gearbox,the composition of the friction torque of deep groove ball bearing under quasi-static condition is analyzed.
Mo Yimin, Xu Wei, Hu Jie, Dong Jixing, Li Lusheng   +4 more
doaj  

Spatiotemporal Regulation of Hierarchical Assembly of Hydroxyapatite for Enamel Remineralization

Advanced Science, EarlyView.
Biomimetic repair exhibits unique advantages for enamel regeneration compared with conventional clinical treatments. An enzymatic mineralization system (EMS) is developed, where the resulting HAP nanorods hierarchically assemble into a highly ordered structure on the enamel surface through the spatiotemporal modulation of interfacial energies of ...
Zhenhang Tang, Zhisen Zhang, Yuanyu Zhou, Wenzhi Wu, Congrui Zhao, Chang Liu, Tong Shi, Wenjing Jin, Zhaoming Liu, Weifeng Fang, Qingyun Lin, Yi He, Zhijian Xie, Ruikang Tang, Changyu Shao, Zhuo Chen   +15 more
wiley   +1 more source