Results 51 to 60 of about 8,133 (281)

Tip-rem modification for full tooth surface pattern and require no edge contact of high loaded capacity cycloidal hypoid gears

Xibei Gongye Daxue Xuebao
The full tooth surface pattern and require no edge contact design of cycloid bevel gears based on Tip-rem is a novel gear optimization design method, which aimed at optimizing contact performance of gears and preventing edge contact, thus improving the ...
Tan Zong, Deng Xiongyao, Li Guowen, Zhou Zhenyu, Rong Shifeng, Tang Jinyuan, Yang Yudian, Yao Wenlong, Ding Han   +8 more
doaj   +1 more source

Multi‐Enzyme Mimetic Molybdenum Nitride Nanozymes Reshape Subgingival Microenvironment for Synergistic Periodontitis Therapy via ROS Regulation and Microbiome Remodeling

Advanced Science, EarlyView.
ABSTRACT Periodontitis, a chronic inflammatory disease initiated and sustained by plaque microorganisms and host immune response, remains an intractable oral disease and a leading cause of tooth loss worldwide. Traditional mechanical debridement and adjunctive antibiotic or antiseptic therapy often shows limited efficacy due to the complex anatomical ...
Weiyu Zhang, Zhongwei Yang, Yunfan Zhang, Longwei Wang, Xiaoyu Zhang, Jiahui Mao, Yizhi Dai, Yifan Yuan, Mingge Wang, Xin Yang, Xin Yu, Jing Liu, Chunying Chen   +12 more
wiley   +1 more source

Aptamer‐Directed Porous DNA Nanocomposite Hydrogel for Active Pulp Preservation: Immunomodulation, Stem Cell Recruitment and Reparative Dentinogenesis

Advanced Science, EarlyView.
This study presents an injectable DNA‐based porous hydrogel integrating catechol motifs and targeting aptamers for pulpitis management. Upon in situ crosslinking, the scaffold actively recruits endogenous dental pulp stem cells, restores redox homeostasis, and modulates immune responses.
Luhui Cai, Huan Yu, Zihan Ni, Kan Chen, I‐Chen Tsai, Zeyu Bao, Shuo Sun, Weichang Li, Yunhua Chen, Qiong Xu   +9 more
wiley   +1 more source

Effect of Geometric Transmission Error on Load and Vibration Characteristic of Spiral Bevel Gear

Jixie chuandong, 2020
The tooth surface grid node coordinates are accurately calculated by the tooth surface equation. According to the density requirements of the grid nodes， the grid nodes are evenly divided， the tooth root transition curve mesh is encrypted， and the finite
Bohui Yang, Xuemei Cao, Dingjun She, Haoyang Tian   +3 more
doaj  

Investigation of Load Sharing and Dynamic Load Characteristics of a Split Torque Transmission System with Double-Helical Gear Modification

Shock and Vibration, 2021
A new dynamic model for a two-input two-path split torque transmission system which considers meshing error, time-varying meshing stiffness, and meshing-in impact is proposed.
Xuan Liu, Zongde Fang, Haitao Jia, Ning Zhao, Yunbo Shen, Hui Guo, Xijin Zhang   +6 more
doaj   +1 more source

Investigation on Tooth Surface Wear of Cycloid Drives Considering Tooth Profile Modifications

Lubricants, 2023
Cycloid drives are widely used in various mechanical systems due to their high reduction ratio, compact size, and high efficiency. Tooth surface wear is a major problem that affects the reliability and durability of cycloid drives.
Xuan Li, Haidong Yang, Weilong Niu, Ran Guo, Lining Sun   +4 more
doaj   +1 more source

Simulation and Analysis on Tooth Meshing Ease-Off Surface of Gears Based on Polynomial Topology Modification

Xibei Gongye Daxue Xuebao, 2020
Based on the principles of common-generating conjugation mapping of pinion-rank-gear meshing, the constructing of ease-off surface has been done by means of the topology modification of the 4-order polynomial surface.

doaj   +1 more source

TEHL analysis of VH-CATT cylindrical gear transmission in elliptical contact considering time-varying parameters

Advances in Mechanical Engineering, 2022
The lubrication characteristics of a cylindrical gear transmission with a variable hyperbolic circular-arc-tooth-trace (VH-CATT) are important theoretical bases for the tribology design of the gear and its fatigue life prediction.
Pei Luo, Yang Wu, Shuang Liang, Li Hou, Qingwen Fan, Yongqiao Wei   +5 more
doaj   +1 more source

Beyond Potency: Emerging Determinants and Optimization Strategies Enhancing Therapeutic Efficacy of Adult Stem Cells

Advanced Science, EarlyView.
Adult stem cell therapy requires more than high in vitro potency. This review proposes a systems framework in which cell‐intrinsic programs, instructive microenvironmental cues, and pre‐/post‐delivery engineering are co‐designed under standardized translational rules.
Soo‐Rim Kim, Yun Jae Jung, Hwa‐Yong Lee   +2 more
wiley   +1 more source

Experimental and Theoretical Study of Gear Dynamical Transmission Characteristic Considering Measured Manufacturing Errors

Shock and Vibration, 2018
In the research of gear transmission, the vibration and noise problem has received many concerns all the times. Scholars use tooth modification technique to improve the meshing state of gearings in order to reduce the vibration and noise. However, few of
Fang Guo, Zongde Fang
doaj   +1 more source