Results 101 to 110 of about 188,421 (295)

Моделирование межслойного разрушения при сверлении композиционных материалов [PDF]

, 2013
Рассмотрена задача определения появления и развития трещины расслоения при сверлении слоистых композиционных материалов, базирующегося на использовании линейной механики разрушения.
Хавин, Геннадий Львович
core  

The integrated method to select drilling muds for abnormally high pressure formations [PDF]

, 2016
The article describes the method for choosing a drilling mud for drilling abnormally high pressure formations. A carefully selected drilling mud formulation would not only enhance an array of interrelated fluid properties, but also minimize the impact on
Boyko, Igor Alekseevich, Dmitriev, Andrey Yurievich, Kayumova, N. S., Khorev, Vladimir Sergeevich, Rakhimov, Timur Rustamovich   +4 more
core   +1 more source

Two‐Dimensional Materials as a Multiproperty Sensing Platform

Advanced Functional Materials, EarlyView.
Various sensing modalities enabled and/or enhanced by two‐dimensional (2D) materials are reviewed. The domains considered for sensing include: 1) optoelectronics, 2) quantum defects, 3) scanning probe microscopy, 4) nanomechanics, and 5) bio‐ and chemosensing.
Dipankar Jana, Shubhrasish Mukherjee, Dmitrii Litvinov, Magdalena Grzeszczyk, Sergey Grebenchuk, Makars Šiškins, Virgil Gavriliuc, Yihang Ouyang, Changyi Chen, Yuxuan Ye, Meng Yiming, Maciej Koperski   +11 more
wiley   +1 more source

Unprecedented Spin‐Lifetime of Itinerant Electrons in Natural Graphite Crystals

Advanced Functional Materials, EarlyView.
Graphite exhibits extraordinary spintronic potential, with electron spin lifetimes reaching 1,000 ns at room temperature ‐ over 100 times longer than graphene‐based devices. Magnetic resonance spectroscopy reveals strong anisotropy: out‐of‐plane spins live 50 times longer than their in‐plane counterparts.
Bence G. Márkus, Dávid Beke, Lili Vajtai, András Jánossy, László Forró, Ferenc Simon   +5 more
wiley   +1 more source

Influence of the Drilling Parameters in the Single-Lip Deep-Hole Drilling Process on the Surface Integrity of Nickel-Based Alloy

Machines
Single-lip deep-hole drilling is a key technology for the precision machining of high-temperature nickel-based alloy pore structures in aero engines.
Tao Wu, Fangchao Zhang, Haoguang Zhou, Dong Zhang   +3 more
doaj   +1 more source

Design of electric control system for coalbed methane truck-mounted drilling rig

Gong-kuang zidonghua, 2019
Aiming at problem that traditional mechanical instrumens and hydraulic control modes cannot meet requirements of safe, accurate and efficient construction of coalbed methane truck-mounted drilling rig, an electric control system for coalbed methane truck-
ZHAO Liang
doaj   +1 more source

A Robust Method for Drilling Monitoring using Acoustic Emission [PDF]

, 2012
Acoustic Emission (AE) is considered an efficient tool for monitoring of machining operations, for both tool condition and working piece integrity. However, the use of AE is more challenging in case of drilling, due to heavy dependence of AE signals to ...
Douilly, M, Le Moal, G, Moraru, George, Rabate, P, Veron, Philippe   +4 more
core  

Quantifying Spin Defect Density in hBN via Raman and Photoluminescence Analysis

Advanced Functional Materials, EarlyView.
An all‐optical method is presented for quantifying the density of boron vacancy spin defects in hexagonal boron nitride (hBN). By correlating Raman and photoluminescence signals with irradiation fluence, defect‐induced Raman modes are identified and established an relationship linking optical signatures to absolute defect densities. This enables direct
Atanu Patra, Paul Konrad, Andreas Sperlich, Timur Biktagirov, Wolf Gero Schmidt, Lesley Spencer, Igor Aharonovich, Sven Höfling, Vladimir Dyakonov   +8 more
wiley   +1 more source

Numerical Simulation on Dynamic Response of Drilling Parameters in Loaded Rock Mass

Applied Sciences
The characterization of the mechanical parameters of rock mass is a basic problem in the field of rock mechanics, and it is also an important basis for surrounding rock classification, stability analysis, and support design in underground engineering ...
Yujing Jiang, Zongmeng Bai, Decheng Ge, Jiankang Liu, Hengjie Luan, Yining Zheng   +5 more
doaj   +1 more source

Імплементація інтелектуальної стратегії прийняття рішень у процесі буріння [PDF]

, 2013
Розроблена методологія прийняття рішень в процесі буріння в реальному часі продемонструвала ефективність застосування для досягнення необхідних значень контрольованих параметрів буріння.
Демчина, М. М., Мельник, В. Д., Шекета, В. І.   +2 more
core