Results 91 to 100 of about 3,418,514 (199)

Axial-torsional nonlinear vibration of bottom hole assembly in the air drilling technology

Petroleum
The safety and efficiency of drilling engineering are greatly impeded by destructive vibrations of drill string in air drilling, such as stick-slip, bit-bounce and their coupled vibrations. To avoid or suppress these vibrations improving the stability of
Shujie Ding, Pan Fang, Gao Li, Junan Lu, Yanmin Wang, Yang Li, Yutian Han, Dong Xiao   +7 more
doaj   +1 more source

Explainable Intelligent Framework for Reliable Drilling Rate Prediction and Feature Selection in Complex Sedimentary Formations

Journal of Petroleum Geology, EarlyView.
ABSTRACT Accurate prediction of the drilling rate of penetration (ROP) is crucial to optimizing drilling performance, wellbore stability, enhancing operational efficiency, and reducing the overall cost of hydrocarbon exploration. This study focused on evaluating and comparing different machine learning models for ROP prediction and identifying the most
Mohammad Islam Miah, Md. Asif Uz Zaman Antu, Travis Wiens   +2 more
wiley   +1 more source

Hydraulic Strategies of Cool‐Temperate Trees and Lianas Against Freeze–Thaw Embolism: Is Cold Winter More Severe on Lianas?

Plant, Cell &Environment, EarlyView.
ABSTRACT Lianas are abundant and influential in tropical forests but decline sharply in cooler regions. This pattern has been attributed to their reliance on a small number of large vessels, which are vulnerable to freeze–thaw embolism. However, the hydraulic functioning of lianas in cooler regions remains poorly understood.
Ryuji Ichihashi, Haruhiko Taneda, Yasuhiro Utsumi   +2 more
wiley   +1 more source

Western String Chamber Orchestra, November 3, 1995

, 2016
Recorded during a live performance at Dalton Center Recital Hall, Western Michigan University, Kalamazoo, Michigan, November 3, 1995, 8:00 p.m., the 114th concert of the School of Music's 1995-1996 season.Western String Chamber Orchestra, Bruce Uchimura,
Western String Chamber Orchestra
core  

A Toolface Prediction Model Considering Nonlinear Wellbore Friction for Directional Coring Drilling Tool

Mathematics
In directional coring drilling, toolface adjustment is performed during drilling interruption by rotating the drill string through the top drive.
Lingda Hu, Lu Wang, Yutong Zu, Xiaochun Ma   +3 more
doaj   +1 more source

A Natural History of ‘Annoyances’: Knowing Weeds and Weeding Knowledge in the Early Royal Society and its ‘Georgicall Committee’

Renaissance Studies, EarlyView.
ABSTRACT Seventeenth‐century virtuosi often figured themselves as epistemic weeders, grubbing up rank thickets of accumulated error. In this article, I argue that these metaphors were unnerved by the shifting status of weeds—ostensibly unwanted plants from the margins of cultivated space, unploughed land or the disturbed soils between growing crops—in ...
Francis Taylor
wiley   +1 more source

Colden String Quartet, October 17, 1980

, 2019
Recorded during a live performance at Oakland Recital Hall, Western Michigan University, Kalamazoo, Michigan on Oct. 17, 1980, 8:00 p.m., program no. 27 of the School of Music's 1980-1981 season.Colden String Quartet (Marshall Meade and Mary Ann Sabato ...
Colden String Quartet
core  

Bayesian optimized color filter: A fast method for segmentation of plant phenotypes from 3D point cloud images

The Plant Phenome Journal, Volume 9, Issue 1, December 2026.
Abstract Multispectral three‐dimensional (3D) imaging offers substantial potential for plant phenotyping, yet manual segmentation of plant organs remains a bottleneck in breeding programs. We developed a color‐based filtering workflow for faba bean (Vicia faba L.) point clouds that optimizes lower and upper thresholds of spectral indices and broadband ...
Lennart Scheer, Benjamin Wittkop, Andreas Stahl, Olaf Sass, Gregor Welna, Hanna Tietgen, Rod J. Snowdon   +6 more
wiley   +1 more source

Numerical Investigation of the Nonlinear Drill String Dynamics Under Stick–Slip Vibration

Vibration
This paper presents a comprehensive analysis of the influence of rotary table velocity, weight-on-bit, and viscous damping on the drill string stick–slip vibration.
Mohammad Javad Moharrami, Hodjat Shiri, Clóvis de Arruda Martins   +2 more
doaj   +1 more source

Four Decades of Research at the MADE Site and Beyond: Advancing the Understanding and Modeling of Solute Transport in Heterogeneous Media

Reviews of Geophysics, Volume 64, Issue 4, December 2026.
Abstract Spatial heterogeneity, manifested as strong variability in hydraulic conductivity (K) within geological formations, exerts a fundamental control on groundwater flow and solute transport. Because K can vary over multiple orders of magnitude in complex three‐dimensional patterns, predicting contaminant plume migration remains a long‐standing ...
Zhilin Guo, Maosheng Yin, Peiyao Dong, Yong Zhang, Kewei Chen, Graham Fogg, Brian Berkowitz, Marco Dentz, Chunmiao Zheng   +8 more
wiley   +1 more source