Results 81 to 90 of about 2,789,125 (261)

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

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

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

Design Technique Research of Fine-Forged Spur Bevel Gear Tooth Profile Modification

, 2010
Gear tooth profile modification can be featured to improve working stability of gear equipments, abate noise and vibration, enhance loading ability and prolong usage life of the gears.
Huan Yong Cui, Xi Jie Tian, Dong Liang Wang   +2 more
core   +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

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

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  

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

Precision Compensation Method of Tooth Profile in Form Grinding of Modified Helical Gears

Jixie chuandong
The coordinate equation of helical gear tooth profile modification and geometric algorithm of form grinding wheel dressing are established, and the section profile of grinding wheel after tooth profile modification is optimized.
Zhang Hao, Su Jianxin, Deng Xiaozhong, Han Zhengyang   +3 more
doaj  

Analysis of Tooth Surface Error of Topology Modification Gear

Jixie chuandong, 2017
When gear topology modification using the forming method grinding,the tooth profile modification is achieved by trimming the wheel truncation,while the tooth modification is achieved by adding an additional movement of the wheel or gear.
Wang Zhonghou, Liu Shaokun, Liu Xinrong, Zhang Liming   +3 more
doaj