Results 61 to 70 of about 2,820,928 (238)

Transient Thermo Elastohydrodynamic Lubrication of Asymmetric Polymer Planetary Gear with Addendum Modification

Jixie chuandong, 2022
In order to investigate the thermo elastohydrodynamic lubrication characteristics of internal meshing asymmetrical gears with addendum modification， the transient thermo elastohydrodynamic lubrication of asymmetrical polymer gears with addendum ...
Mingyu Zuo, Youqiang Wang, Guangxiao Jian, Yu Hu, Jun Mo, Yuxin Fang   +5 more
doaj  

Influence of Involute Cylindrical Gear Tooth Profile Modification on the Stress of Gear Tooth

, 2019
Through the analysis and study of involute gear modification, a new method is applied to modify the gear nonworking surface. And the tooth profile equation of the involute gear nonworking surface is built.
Xiao Han, Xinli Xu
core   +1 more source

Anatomy and variation in the paraphyletic Mosasaurus lemonnieri assemblage from the Craie phosphatée de ciply, Belgium

The Anatomical Record, EarlyView.
Abstract Nineteenth century excavations of the Ciply‐Malogne Phosphatic Chalk Formation in Hainaut, Belgium, yielded over 50 partial mosasaur skeletons, the majority of which were referred to the species Mosasaurus lemonnieri Dollo, 1889. In the years since, this taxon has experienced a complicated taxonomic history, and its exceptional hypodigm has ...
Henry S. Sharpe, Hallie P. Street‐Sampson, Takuya Konishi, Michael W. Caldwell   +3 more
wiley   +1 more source

Redescription of the cranial morphology of Amphisbaena braestrupi and Amphisbaena laurenti (Squamata: Amphisbaenidae) from the Pleistocene of Brazil using x‐ray computed tomography

The Anatomical Record, EarlyView.
Abstract Amphisbaenians (Squamata: Amphisbaenidae) are fossorial reptiles with highly specialized cranial morphology, yet their fossil record is frequently limited by fragmentary preservation. This study provides a detailed osteological redescription of the skulls of Amphisbaena braestrupi and Amphisbaena laurenti from the Pleistocene of Lagoa Santa ...
Carolina L. Paiva, Henrique C. Costa, Christy A. Hipsley   +2 more
wiley   +1 more source

First Record of Tasmanian Devils in the Pilbara: Late Quaternary Subfossils From Juukan Gorge, Puutu Kunti Kurrama Country, and Insights Into Human—Faunal Relationships and Extinction

Archaeology in Oceania, EarlyView.
ABSTRACT This study presents the first unequivocal evidence for the presence of Tasmanian devils (Sarcophilus harrisii) in the Pilbara region of northwestern Australia, based on material recovered from archaeological excavations at Juukan Gorge on Puutu Kunti Kurrama and Pinikura country.
Timothy J. Churchill, Michael Slack, Elise Matheson, Liam Neill, Wanchese M. Saktura, Gavin Ashburton   +5 more
wiley   +1 more source

Radial Modification Design of Triple Arc Tooth Profile of Flexspline on Uniformly Distributed Spatial Backlash based on Harmonic Gear

Jixie chuandong, 2021
For better meshing status between spatial tooth profile of flexspline machined by radial modification of the tool and the planar tooth profile of circular spline，a design method for radial modification of flexspline tooth profile is proposed.
Zhongfu Cheng, Jingzhong Xing, Liteng Shi, Xiaoxia Chen   +3 more
doaj  

Optimized micro‐sized cell sphere‐matrix niche co‐aggregates promote efficient oral and craniomaxillofacial bone regeneration

BMEMat, EarlyView.
The construct of cell‐niche co‐aggregates (GelMA‐SHED sphere‐DDMPs) promotes cranial and periodontal bone regeneration and ensures angiogenic‐osteogenic coupling by downregulating miR‐34c‐5p to enhance the expression of NOTCH1 and its intracellular domain (NICD).
Xiao‐Hui Zhang, Shi‐Han Mu, Yi‐Han Xiao, Lu‐Fan Yang, Peng‐Fei Wang, Teng‐Fei Hu, Jun‐Xi He, Jiong‐Zhen Piao, Sha Zhang, Jin‐Yu Liu, Yi‐De He, Ying‐Ying Wu, Si‐Qi Ying, Xin‐Yue Cai, Chen‐Han Li, Zi‐Qi Zhang, Xiao Lei, Ji Chen, Jian‐Fei Liang, Yan Jin, Bing‐Dong Sui, Chao Ma, Chen‐Xi Zheng, Fang Jin   +23 more
wiley   +1 more source

Tooth Profile Modification Method of RV Reducer Cycloid Gear Aiming at Optimizing Carrying Capacity

, 2022
Cycloid gear tooth profile modification is very important to the performance of RV reducer，in order to select the shape modification method and parameter size reasonably and improve the stress state of the cycloid tooth surface，an equidistant & ...
Mingyuan Lei, Zhili Li, Zongwen An, Panlong Jia, Qiang Wang   +4 more
core   +1 more source

A biomechanical optimized Zr58Cu25Al14Nb3 bulk metallic glass dental implant improves peri‐implant stress distribution and bone quality under physiological loading

BMEMat, EarlyView.
This study reports a novel Zr58Cu25Al14Nb3 bulk metallic glass that possesses high mechanical strength and low elastic modulus, which further promotes efficient mechanotransduction and significantly improves peri‐implant bone quality upon cyclic occlusal loading.
Yunshu Wu, Feifei Wang, Yuan He, Yaopeng Zhang, Yuhao Zeng, Fu Zheng, Zhanqi Wei, Sukun Tian, Kinon Chen, Baoan Sun, Yuchun Sun   +10 more
wiley   +1 more source

Research on the matching relation between the profile-shifted coefficients and tooth profile modification parameters of heavy-duty gear pairs

Jixie chuandong
ObjectiveTo achieve reasonable matching between the gear modification coefficient and tooth profile modification parameters and improve gear meshing performance, a meshing excitation calculation model for gear transmission systems considering both gear ...
CHEN Qingjian, LI Zhengfa, LIN Li, CHEN Zaigang   +3 more
doaj