Results 21 to 30 of about 6,474 (285)

Study on Instability Mechanism of Extraction Structure under Undercut Space Based on Thin Plate Theory in Block Caving Method

open access: yesShock and Vibration, 2021
The instability of extraction structure under the undercut space in the block caving stope presents specific characteristics: rib spalling and floor heave in ore-loading roadway and collapse of major apexes.
Zhi-Yuan Xia, Zhuo-Ying Tan
doaj   +1 more source

Numerical Modeling Shows Increased Fracturing Due to Melt-Undercutting Prior to Major Calving at Bowdoin Glacier

open access: yesFrontiers in Earth Science, 2020
Projections of future ice sheet mass loss and thus sea level rise rely on the parametrization of iceberg calving in ice sheet models. The interconnection between submarine melt-induced undercutting and calving is still poorly understood, which makes ...
Eef C. H. van Dongen   +5 more
doaj   +1 more source

Investigation and Characterization of Pipe Defects and Techniques, and Challenges Toward the Protection of Environmental Protection [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering
Pipes have been used for many years to transport fluids safely. Historically, pipes have been used in many different ways; however, many internal and external parameters affect the use of pipes, such as leakage, chemical corrosion, fatigue, and sediment.
Ata Jahangir Moshayedi   +6 more
doaj   +1 more source

Enhanced etching characteristics of Si{100} in NaOH-based two-component solution

open access: yesMicro and Nano Systems Letters, 2022
Silicon wet bulk micromachining is the most widely used technique for the fabrication of diverse microstructures such as cantilevers, cavities, etc. in laboratory as well as in industry for micro-electromechanical system (MEMS) application.
V. Swarnalatha   +3 more
doaj   +1 more source

Wet anisotropic etching characteristics of Si{111} in NaOH-based solution for silicon bulk micromachining

open access: yesMicro and Nano Systems Letters, 2022
Silicon bulk micromachining is extensively employed method in microelectromechanical systems (MEMS) for the formation of freestanding (e.g., cantilevers) and fixed (e.g., cavities) microstructures.
S. Purohit   +3 more
doaj   +1 more source

Disc Tool Profiling for Air Compressor Screws with Complex Characteristic Curves

open access: yesJournal of Machine Engineering, 2021
One of the best practical methods to machine the air compressor screw pairs is milling or grinding by disc tools. The mathematics involved in disc tool profiling is quite complex and requires representing the machined surface by mathematical equations ...
Tuan-Linh Nguyen, Long Hoang
doaj   +1 more source

Effects of undercutting and sliding on calving: a global approach applied to Kronebreen, Svalbard [PDF]

open access: yesThe Cryosphere, 2018
In this paper, we study the effects of basal friction, sub-aqueous undercutting and glacier geometry on the calving process by combining six different models in an offline-coupled workflow: a continuum–mechanical ice flow model (Elmer/Ice), a climatic
D. Vallot   +10 more
doaj   +1 more source

A note on the undercut procedure [PDF]

open access: yesSocial Choice and Welfare, 2014
The undercut procedure was presented by Brams, Kilgour and Klamler (2012) as a procedure for identifying an envy-free allocation when agents have preferences over sets of objects. They assumed that agents have strict preferences over objects and their preferences are extended over to sets of objects via the responsive set extension.
openaire   +6 more sources

Influence of interwire angle on undercutting formation and arc behavior in pulsed tandem narrow-gap GMAW

open access: yesMaterials & Design, 2020
The tandem narrow-gap gas metal arc welding was adopted in this study. The effects of interwire angle on the welding process stability and arc behavior were investigated.
Guoqiang Liu   +4 more
doaj   +1 more source

Research on Curvature Interference Characteristics of Conical Surface Enveloping Cylindrical Worm–Face Worm Gear Drive

open access: yesApplied Sciences
This study proposes the use of Physics-Informed Neural Networks (PINNs) to further advance the curvature interference analysis method. The nonlinear equation system encountered in determining the curvature interference limit line is embedded into the ...
Shibo Mu   +8 more
doaj   +1 more source

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