Results 121 to 130 of about 19,738 (285)

Mechanical plaque removal in step‐1 of care

Periodontology 2000, EarlyView., 2023
Abstract Maintaining a regular oral hygiene routine is essential for taking care of our mouths, ensuring healthy teeth, and achieving fresh breath. Patient education on oral hygiene is an important component of their overall treatment. Firstly, patients should be informed about the direct connection between bacteria in dental plaque and oral diseases ...
G. A. (Fridus) Van der Weijden, Cor van Loveren   +1 more
wiley   +1 more source

Mechanism and test analysis of rail corrugation

Journal of Advanced Mechanical Design, Systems, and Manufacturing
In view of the common phenomenon of rail corrugation on subway lines, both field measurement and numerical simulation were used to study mechanism of rail corrugation. In field measurement, vibration signals of vehicles were measured when a train passing
Dilai CHEN, Tiancheng XIONG, Chenxu LU, Rui SONG, Lixia SUN, Gang SHEN   +5 more
doaj   +1 more source

Beyond wound sealing: A dual‐functional adhesive nanofiber membrane promoting coagulation and osteogenesis in extraction sites

BMEMat, EarlyView.
Inspired by the suction mechanics of octopus suckers, a dual‐layer nanofiber membrane integrates antibacterial protection, strong wet adhesion, and osteogenic support, offering a bioinspired strategy for effective hemostasis and alveolar bone preservation.
Huijing Ma, Liheng Gao, Hao Liang, Wentao Jiang, Junyi Wang, Jiajia Wang, Shuhan Duan, Lingxi Meng, Adilijiang Yimiti, Wenjie Zhang   +9 more
wiley   +1 more source

Analysis of Stick-Slip Vibration of PDC Bit under Sudden Increase of Formation Hardness

Shiyou jixie, 2019
In drilling an interbedded soft and hard formation with PDC bit, it is prone to cutter crack and damage. To address the issue, the stick-slip vibration characteristics of PDC bit during the sudden increase of formation hardness were studied.
Zha Chunqing, Chen Jie, Zhao Jincheng, Liu Gonghui   +3 more
doaj  

A review of torsional vibration mitigation techniques using active control and machine learning strategies

Petroleum
Drilling is one of the most challenging and expensive processes in hydrocarbon extraction and geothermal well development. Dysfunctions faced during drilling can increase the non-productive time (NPT) greatly, resulting in inflating the drilling cost and
Aditya Sharma, Khizar Abid, Saket Srivastava, Andres Felipe Baena Velasquez, Catalin Teodoriu   +4 more
doaj   +1 more source

Modelling friction contacts in structural dynamics and its application to turbine bladed disks [PDF]

, 2011
Firrone C.M., Zucca S.
core   +2 more sources

An assessment of stress and production rate of sucker rod heat pipes in oil well pumping system

Deep Underground Science and Engineering, EarlyView.
The sucker rod pumping system is the preferred oil extraction technique. The concept about equipping the hollow vacuum space in solid sucker rods with heat pipe has been scrutinized in terms of stress and oil production evaluation. Abstract The implementation of the heat pipe concept in sucker rods for oil pumping systems negates the requirement for an
R. S. Anand, Ang Li, Wenbo Huang, Juanwen Chen, Qingshan Ma, Fangming Jiang   +5 more
wiley   +1 more source

Analytical expressions of friction-induced self-excited vibration amplitudes of the marine rubber bearing-shaft system

Journal of Low Frequency Noise, Vibration and Active Control
By the analytical method, this paper investigates the mode-coupling friction-induced instability and the resulting stick-slip self-excited vibration of the marine stern water-lubricated rubber bearing-shaft system.
Chuang Wu, Dejiang Shang, Yan Xiao, Chao Zhang, Yongwei Liu   +4 more
doaj   +1 more source

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

On a hereditarity vibrating system with allowance for the effects stick-slip

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2016
Summary: The work was a mathematical model that describes the effect of the sliding attachment (stick-slip), taking into account hereditarity. An explicit finite-difference scheme for the corresponding. Cauchy problem was constructed. Built on the basis of its waveform and phase trajectories.
openaire   +2 more sources