Results 61 to 70 of about 4,938,454 (321)
Research on Axial-torsional Coupling Percussion Drilling Technology
Shiyou jixie, 2018 The solo axial or torsional percussion rock breaking technology with inherent limitations can no longer meet the current drilling development needs. Based on the in-depth study of axial and torsional percussion rock breaking drilling speed improvement ...
Mu Zongjie +3 more
doaj
Preservation therapy for vertically fractured teeth with periodontal tissue regeneration using FGF‐2
Clinical Advances in Periodontics, EarlyView.Abstract Background Vertically fractured teeth often have a poor prognosis, and extraction is considered the most predictable treatment. Conventional management has consisted of preservation therapy involving extraction, bonding, root restoration, and replantation of fractured teeth.
Masaichiro Iwasaki +4 more
wiley +1 more source
Analysis on the mechanism of sound production and effects of musical flue pipe
Cognitive Computation and Systems, 2022 String instruments, wind instruments and percussion instruments are three traditional categories of musical instruments, among which wind instruments play an important role. Usually, pitches of wind instruments are determined by the vibrating air column,
Jing Jiang +4 more
doaj +1 more source
Sensory sensitivity as a link between concussive traumatic brain injury and PTSD. [PDF]
, 2019 Traumatic brain injury (TBI) is one of the most common injuries to military personnel, a population often exposed to stressful stimuli and emotional trauma.
Fanselow, Michael S +4 more
core +1 more source
Perigraftitis, an independent biologic complication associated with implants placed in grafted bone
Clinical Advances in Periodontics, EarlyView.Abstract Background Perigraftitis is a recently introduced concept describing biologic complications specifically associated with implants placed in grafted bone. It is characterized by inflammation resulting from bacterial colonization of grafted bone and/or residual graft particulates.
Jonathan H. Do +2 more
wiley +1 more source
Structural Design and Test of Mechanical Rotary Percussion Drilling Tool
Shiyou jixie, 2020 Rotary percussion drilling technology can greatly increase the ROP of hard formations, but for plastic rocks, rock fragmentation is poor. For this reason, this paper proposes a technical plan for mechanical rotary percussion drilling tool prototype ...
Zhang Haiping
doaj
Bioinspired Crossmodal Tactile Sensory Nerve for High‐Accurate Object Recognition
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.An artificial crossmodal sensory neuron system (ACSNS) that combines a complementary memristor with high‐sensitivity pressure–temperature bimodal sensors, which integrate tactile perception, information storage, and neuromorphic computing. With the aid of machine learning, this ACSNS presents an improved accuracy of 96.67% in recognizing temperatures ...
Delu Chen +8 more
wiley +1 more source
Simulation Study on Compound Percussion Frequency Matching Characteristics
Shiyou jixie, 2019 There are many researches on the traditional axial impact rock breaking and torsional impact rock breaking mechanism. But researches on the rock breaking mechanism of compound percussion drilling are few and are still in infancy state.
Li Yumei +4 more
doaj
Variations on a theme by Rimbaud
Per Musi, 2021 This article presents an analysis of the poem “Cocheiro Bêbado” by Rimbaud, translated by Augusto de Campos. The Portuguese version expressive ly high lights the acousticism pression of the characters' movements during the lyrical plot. More specifically,
Célia Maria Domingues da Rocha Reis +2 more
doaj +1 more source
Push-and-Twist Drillstring Assemblies [PDF]
, 2017 Deep drilling using a rigid drillstring requires the assembly and disassembly of multiple drill pipes. The interfaces between these pipes provide a challenge for automation because they must transmit large drilling forces and movements while, at the same
Firstbrook, David G. +5 more
core