Results 61 to 70 of about 3,599,285 (203)

Research on Optimization of Pressure Wave Waveform of Continuous Wave Drilling Fluid Pulse Generator

Shiyou jixie, 2020
To solve the problem of poor half periodicity of pressure wave shape of continuous wave drilling fluid pulse generator, the pressure difference calculation model and numerical simulation calculation model are established, and the pressure waveform of ...
Liu Xianbo, Xue Liang, Liu Min, Wang Zhiming, Zhang Zheng, Shao Tianyu   +5 more
doaj  

Changes in lip, cheek, and tongue pressures after rapid maxillary expansion using a diaphragm pressure transducer [PDF]

, 2003
The purpose of this study was to investigate the changes in pressures that are exerted to maxilla by the tongue, lip, and cheek before and after expansion and during the retention period.

core  

Modification Method of Cycloid Tooth Profile based on Pressure Angle

Jixie chuandong, 2020
Abrscat For the cycloid gear of RV reducer used in robot， on the basis of the isometric modification method， the modification quantity is changed in linear and polynomial ways， and the cycloid tooth profile equations after profile modification are ...
Lang Yue, Weidong He, Yinghui Zhang
doaj  

Systemic medications and other risk factors of open-angle glaucoma [PDF]

, 2012
Het onderzoek in dit proefschrift is ontworpen om de werking van sommige systemische geneesmiddelen te ontcijferen en een aantal andere risicofactoren van open-kamerhoek glaucoom (OKG) te onderzoeken.
Marcus, Michael Williams, Marcus, Michael Williams,   +1 more
core   +1 more source

Research on Wellbore Collapse of Stratification Formation

Shiyou jixie, 2019
The development micro-fractures, joints and bedding in the middle and deep strata of the Bohai Oilfield makes the collapse pressure predicted using conventional integrate formation not consistent with actual situation.
Zhang Lei, Xu Jie, Liu Hailong, Xie Tao, Han Yaotu   +4 more
doaj  

Numerical simulation study on the propagation and attenuation of shock waves in ventilation tunnels

Scientific Reports
This study systematically investigated the influence of tunnel spatial characteristics on the propagation and attenuation patterns of gas explosion shock waves by establishing models of straight tunnels with varying bending angles and branched tunnels ...
Wei Li
doaj   +1 more source

Letters From Our Readers

, 2017
Response to: Pain and discomfort following insertion of miniscrews and premolar extractions: A randomized controlled trial. The Angle Orthodontist; 2016;86:891–899.
Ingalill Feldmann, Niels Ganzer, Bondemark, Lars,, Ganzer, Niels,, Lars Bondemark, Feldmann, Ingalill,   +5 more
core   +1 more source

Optimization design using a global and comprehensive performance index and angular constraints in a type of parallel manipulator

Advances in Mechanical Engineering, 2018
The kinematic optimization of a type of parallel manipulator is addressed. Based on the kinematic analysis, the pressure angles within a limb and among the limbs are introduced, which have definite physical and geometrical meanings. In particular, a type
Jiangping Mei, Xu Zhang, Jiawei Zang, Fan Zhang   +3 more
doaj   +1 more source

Impact of Phacoemulsification Surgery on Intraocular Pressure in Primary Angle-Closure Glaucoma

, 2012
Pur po se: To investigate whether primary phacoemulsification in acute primary angle closure glaucoma (APACG) and chronic primary angle closure glaucoma (CPACG) will lower intraocular pressure (IOP) or not.
Volkan Dayanır, Aykut Özdemir, Ahmet Kaplan, Esin Kırıkkaya   +3 more
core   +1 more source

Mathematical model for droplet size prediction of gas-water nozzle based on orthogonal experiment

Meikuang Anquan
In order to understand the influence of process parameters and structural parameters of internal mixing gas-water nozzle on atomization characteristics, based on a self-designed experimental platform for atomization characteristics, the influence of air ...
Xin WANG, Wenpu LI, He SHAO, Yiyi ZHENG, Yurong GAO, Xi CHEN   +5 more
doaj   +1 more source