Results 151 to 160 of about 182,049 (317)

Uma análise numérica do impacto em válvulas do tipo palheta de compressores [PDF]

, 2012
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia MecânicaVálvulas do tipo palheta adotadas em compressores estão sujeitas a falhas estruturais devido à fadiga por flexão e por ...
Lajús Júnior, Francisco Carlos
core  

Comparative evaluation of left ventricular mass regression after aortic valve replacement: a prospective randomized analysis

, 2011
Background: We assessed the hemodynamic performance of various prostheses and the clinical outcomes after aortic valve replacement, in different age groups.
Wood Jeffrey P, Doss, Mirko, Moritz Anton, Arndt H Kiessling, Mirko Doss, Kiessling, Arndt Holger, Anton Moritz, Jeffrey P Wood, Wood, Jeffrey P., Moritz, Anton, Doss Mirko, Kiessling Arndt H   +11 more
core   +1 more source

A Worm‐Inspired Origami Robot with Multimodal Locomotion for Adaptive Mobility in Complex Pipeline Environments

Advanced Science, EarlyView.
An origami worm‐inspired robot achieves multimodal locomotion in confined pipelines through mechatronic integration that embeds actuation, control, and communication within each origami module. Large, reversible configuration and dimensional changes enable 25 gaits synthesized by a unified framework across peristaltic, inchworm, and wheel‐rolling modes
Qiwei Zhang, Kangning Tan, Zihan He, Hongsen Pang, Yanjie Wang, Hongbin Fang, Jian Xu   +6 more
wiley   +1 more source

Effects of distribution valve spring stiffness and opening pressure on the volumetric efficiency of micro high-pressure plunger pump

Advances in Mechanical Engineering
With the rapid development of material science and manufacturing capabilities, hydraulic technology is increasingly high-pressure, lightweight and miniaturizing.
Cao Wenbin, Miao Ruilin, Liu Yinshui, Wu Defa, Chen Xiaowen   +4 more
doaj   +1 more source

SERRATE Regulates Floral Meristem Activity by Antagonizing SHOOT MERISTEMLESS and Repressing Cytokinin Signaling

Advanced Science, EarlyView.
Floral meristem (FM) activity is crucial for the initiation of floral organs. In this study, SE represses IPT7 expression and cytokinin signaling via both the miR171c‐5p–KNAT2 and miR164c–CUC1/2–KNAT2 regulatory modules, thereby repressing FM activity. In contrast, STM induces both KNAT2 and IPT7 expression.
Wen Yang, Yiting Wang, Yuxin You, Zhiyue Wu, Dongbao Li, Xin Wang, Yongsheng Chang, Hang Zhao, Tao Zhu, Dijun Chen, Wei Chen, Bo Sun   +11 more
wiley   +1 more source

Análise de condições operacionais críticas em posicionadores eletro-hidráulicos [PDF]

, 2014
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2014.Mesmo com o avanço tecnológico já alcançado, problemas relacionados com a seleção adequada do tipo ...
Destro, Mário Cesar
core  

Electrohydraulic Folding Ring Actuators for Radially Contracting Applications

Advanced Science, EarlyView.
This work presents an Electrohydraulic Folding Ring Actuator that combines high‐performance electrohydraulic actuation with origami‐inspired folding geometry to achieve constricting radial actuation. This integration yields significant inner lumen constriction, alongside a gripping force capable of holding objects exceeding four times the actuator's ...
Gavril Yong En Tan, Quan Xiong, Jonathan William Ambrose, Zeynep Altundal, Raye Chen‐Hua Yeow   +4 more
wiley   +1 more source

Modern Developments in Automatic Control Valves

Measurement + Control, 1971
P. Stone
doaj   +1 more source

Enhancing Biogenic Formic Acid Production in the Modified OxFA Process by Acetonitrile Addition

Advanced Science, EarlyView.
In this study, the beneficial effect of using acetonitrile as a co‐solvent in the modified OxFA process is shown, outperforming methanol, demonstrating improved reaction kinetics combined with high selectivity for the HPA‐2 (H5PV2Mo10O40) catalyzed oxidation of xylose to FA.
Jan‐Dominik H. Krueger, Pegah Saedi, Maximilian J. Poller, Alberto Collauto, Jason P. Hallett, David Robinson, Maxie M. Roessler, Jakob Albert   +7 more
wiley   +1 more source

Valve-in-valve-in-valve with the New Valve Technology allegra transcatheter heart valve system

European Heart Journal, 2018
Miura, Mizuki, Taramasso, Maurizio, Obeid, Slayman, Nietlispach, Fabian   +3 more
openaire   +2 more sources