Results 11 to 20 of about 295,815 (353)

Analysis of the Vibration Characteristics of a Boring Bar with a Variable Stiffness Dynamic Vibration Absorber

open access: yesShock and Vibration, 2019
Boring bars are widely used in deep hole machining. Due to the low stiffness of the long cantilever boring bar, vibration often occurs in the boring process. Vibration suppression can permit higher productivity and a better surface finish. To improve the
Lie Li, Beibei Sun, Haitao Hua
doaj   +2 more sources

Advanced prediction of tunnel boring machine performance based on big data

open access: yesGeoscience Frontiers, 2021
Predicting the performance of a tunneling boring machine is vitally important to avoid any possible accidents during tunneling boring. The prediction is not straightforward due to the uncertain geological conditions and the complex rock-machine ...
Jin-hui Li   +4 more
semanticscholar   +1 more source

Early Monitoring of Forest Wood-Boring Pests with Remote Sensing.

open access: yesAnnual Review of Entomology, 2022
Wood-boring pests (WBPs) pose an enormous threat to global forest ecosystems because their early stage infestations show no visible symptoms and can result in rapid and widespread infestations at later stages, leading to large-scale tree death. Therefore,
Youqing Luo, Huaguo Huang, A. Roques
semanticscholar   +1 more source

Turning back the clock: Beliefs about gender roles during lockdown [PDF]

open access: yes, 2023
We study the impact of lockdown measures on beliefs about gender roles. We collect data from a representative sample of 1000 individuals in France during the first COVID-19 lockdown in 2020.
Gloria Moroni   +4 more
core   +1 more source

Big Data-Based Boring Indexes and Their Application during TBM Tunneling

open access: yesAdvance in Civil Engineering, 2021
Tunnel boring machine (TBM) tunneling data have been extensively collected to utilize TBM information technology by analyzing and mining the data for achieving a safe and efficient TBM tunneling. Feature extraction of big data could reduce the complexity
Shuangjing Wang   +5 more
semanticscholar   +1 more source

Rotation of the Philippine Sea plate inferred from paleomagnetism of oriented cores taken with an ROV-based coring apparatus

open access: yesEarth, Planets and Space, 2021
Reconstructing the history of Philippine Sea (PHS) plate motion is important for better understanding of the tectonics of the surrounding plates. It is generally considered that the PHS plate migrated northward since Eocene, but its rotation has not been
Toshitsugu Yamazaki   +5 more
doaj   +1 more source

Chemistry of alkaline earth metals: It is not all ionic and definitely not boring!

open access: yesCoordination chemistry reviews, 2020
Some scientists might consider group 2 chemistry as “boring, closed shell and all ionic, aqueous chemistry, where everything is known! It is not worth investigating”. How wrong they are! Far from forming only purely ionic compounds, this review will shed
K. Fromm
semanticscholar   +1 more source

Special equipment for processing inner holes in bending section of the main pipeline in nuclear power plant

open access: yesThe Journal of Engineering, 2020
Because of the special forging material and complex pipe structure of the main pipe of the AP1000 nuclear power plant, a single general equipment can not meet the requirements of machining the inner hole of the bending section.
Wenwu Zhang   +3 more
doaj   +1 more source

Regularities of changing the dimensions of the main bore of the cylinder of TMZ-450D diesel engine during the technological process

open access: yesЗаписки Горного института, 2021
The article deals with the problems arising during the mechanical and thermal treatment of the TMZ-450D diesel engine cylinder, which is the base part of the engines of small-sized generators and compressors, which are widely used for mobile units in the
Alexander S. Yamnikov   +1 more
doaj   +1 more source

E-YOLOv4-tiny: a traffic sign detection algorithm for urban road scenarios

open access: yesFrontiers in Neurorobotics, 2023
IntroductionIn urban road scenes, due to the small size of traffic signs and the large amount of surrounding interference information, current methods are difficult to achieve good detection results in the field of unmanned driving.MethodsTo address the ...
Yanqiu Xiao   +11 more
doaj   +1 more source

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