Results 41 to 50 of about 193,780 (356)

Thermal analysis in drilling of ex vivo bovine bones [PDF]

, 2017
Bone drilling is a common procedure in Medicine, mainly in traumatology and orthopedic procedure for fractures fixation and in reconstructive surgery. The success of this surgical procedure is dependent on many factors, namely, on heat generation control
Dias, M.I., Fernandes, M.G.A., Fonseca, E.M.M., Jorge, Renato N., Vaz, M.   +4 more
core   +1 more source

Drilling Parameter Control Based on Online Identification of Drillability and Multi-Objective Optimization

Machines
Aiming at the problem that drilling parameters are difficult to adjust in time for the driller due to the complex geological environment in underground coal mines, a drilling parameter control method based on online identification of drillability and ...
Jianbo Dai, Xilu Yin, Yan Zhang, Lei Si, Dong Wei, Zhongbin Wang, Longmei Zhao   +6 more
doaj   +1 more source

Experimental study on rock cutting characteristics of granite broken by impregnated diamond bit

Jin'gangshi yu moliao moju gongcheng, 2023
The characteristics of rock cuttings are important factors affecting their annulus upward return. The indoor micro drilling experiment was carried out to study the characteristics of rock cuttings produced by impregnated diamond bit breaking granite.
Xin KANG, Long chen DUAN, Weiwei LIU, Songcheng TAN, Dazhao HE   +4 more
doaj   +1 more source

Autonomous parameter optimization for femtosecond laser micro-drilling

Optics Express, 2021
There is a strong need for a highly efficient method to find the optimal conditions to achieve a desired result in laser processing, oftentimes from a multidimensional parameter space. In this study, we adopted Bayesian optimization as an efficient statistical optimization method robust to the inherent variations observed in typical laser processing ...
Keiichi Bamoto, Haruyuki Sakurai, Shuntaro Tani, Yohei Kobayashi   +3 more
openaire   +2 more sources

Identification method of roof rock interface based on response characteristics of drilling parameters

矿业科学学报
This paper investigates measurement while drilling for rock strata interface to achieve geological transparency, promote intelligence development, and address the limitations of traditional rock detection methods in coal mines, including slow speed, high
LI Dianshang, LIU Cancan, WANG Chuanbing, REN Bo, REN Shuai, KANG Zhipeng   +5 more
doaj   +1 more source

An optimized identification method of coal-bearing stratum lithology

Gong-kuang zidonghua, 2020
In view of difficulties in obtaining stratum information parameters and low accuracy of lithology identification in existing lithology identification method of coal-bearing stratum in coal mine underground, an optimized identification method of coal ...
ZHANG Ning, ZHANG Youzhen, YAO Ke
doaj   +1 more source

Wood wasp inspired space and earth drill [PDF]

, 2010
In this chapter, we explain why the low gravity encountered on Mars or on the Moon and the low mass of the probes, landers and rovers that carry drilling devices limit classical drilling techniques.
Coste, Pierre, Gao, Yang, Gouache, Thibault, Gourinat, Yves   +3 more
core  

Experimental research into the effect of some operation factors and rock properties on the rate of penetration [PDF]

, 2020
Purpose. The purpose of this research is to investigate the effect of weight on bit (WOB), rotary speed (RPM), and some rock properties on the rate of penetration (ROP). Methods.
Ali, Mahrous A.M., Boghdady, Gamal Y., Mohamed, Ahmed S., Sayed, Mohamed A., Yassien, Mohamed A.   +4 more
core   +1 more source

Infrared laser sampling of low volumes combined with shotgun lipidomics reveals lipid markers in palatine tonsil carcinoma

Molecular Oncology, EarlyView.
Nanosecond infrared laser (NIRL) low‐volume sampling combined with shotgun lipidomics uncovers distinct lipidome alterations in oropharyngeal squamous cell carcinoma (OPSCC) of the palatine tonsil. Several lipid species consistently differentiate tumor from healthy tissue, highlighting their potential as diagnostic markers.
Leonard Kerkhoff, Manuela Moritz, Dennis Eggert, Anna Worthmann, Joerg Heeren, Henrike Zech, Till S. Clauditz, Waldemar Wilczak, Hartmut Schlüter, Christian S. Betz, Arne Böttcher, Jan Hahn   +11 more
wiley   +1 more source

Real-time evaluation of the dynamic Young’s modulus for composite formations based on the drilling parameters using different machine learning algorithms

Frontiers in Earth Science, 2022
The dynamic Young’s modulus (Edyn) is a parameter needed for optimizing different aspects related to oil well designing. Currently, Edyn is determined from the knowledge of the formation bulk density, in addition to the shear and compressional velocities,
Ahmed Abdulhamid Mahmoud, Hany Gamal, Salaheldin Elkatatny, Weiqing Chen   +3 more
doaj   +1 more source