Results 21 to 30 of about 85,320 (260)

“DEPENDENCE OF THE BOND WORK INDEX ON THE FILLING RATIO AND TEST SIEVE APERTURE”. [PDF]

open access: yesJES. Journal of Engineering Sciences, 2020
Knowledge of the grindability behavior of solid materials can be considered as an important factor for the design of their grindability systems. Bond work index (Wi) can be considered as one of the most important affecting factors in the design of grinding systems which express on the value of energy (kwh) consumed per ton of the ground ore.
openaire   +2 more sources

Filtration characteristics of composite filter of woven-nonwoven geotextile in tailings ponds

open access: yesJournal of Industrial Textiles, 2022
Nonwoven geotextiles are widely used in tailings ponds for filtration and drainage, but there is a risk of failure of nonwoven geotextile due to physical clogging.
Sheng Liu   +3 more
doaj   +1 more source

Laser beam shaping in an apodizer with a rectangular serrated aperture

open access: yesКомпьютерная оптика, 2023
Profile transformation of a uniform monochromatic beam with a flat wavefront after the propagation through an apodizer comprising a square serrated aperture and a spatial filter is theoretically considered at the apodizer exit and behind it.
I.M. Sizova
doaj   +1 more source

Brazilian species of Gadila (Mollusca: Scaphopoda: Gadilidae): rediscovery of Gadila elongata comb. nov. and shell morphometrics

open access: yesZoologia (Curitiba), 2010
Gadila elongata comb. nov. was described in 1920 from the northern Gulf of Mexico. Until recently, it was only known from the type locality. Herein we present the first record of G.
Carlos H. S. Caetano   +2 more
doaj   +1 more source

Experimental study and discrete element simulation on interface friction of geo-encased stone columns

open access: yesYantu gongcheng xuebao, 2022
The friction characteristics of the column-soil interface is important to the load transfer mechanism of geo-encased stone columns. In this study, model tests are conducted using a large direct shear device to investigate the effects of the normal stress,
ZHANG Ling 1, 2, 3, XU Ze-yu 1, 2, 3, YAO Pan 1, 2, 3, ZHAO Ming-hua 1, 2, 3, CHEN Long 1, 2, 3
doaj   +1 more source

Mechanistic analysis of TBM cutterhead-ground interaction under mud build-up effect

open access: yesFrontiers in Earth Science
IntroductionIn tunnel construction using TBMs, the complex mineral composition of strata and hydrogeological conditions often induce cutterhead mud build-up, which results in sharp increases in torque and thrust, thereby reducing excavation efficiency ...
Renchong Wang   +6 more
doaj   +1 more source

A new flow chip in combination with multiphoton microscopy as a protocol for longitudinal 3D imaging of tissue calcification under shear stress

open access: yesFEBS Open Bio, EarlyView.
Miniaturized flow chip platform enabling continuous perfusion and longitudinal multiphoton 3D imaging of vascular smooth muscle cell constructs under physiological flow. Brightfield imaging guides region selection, while CellTracker Green and mRuby‐labeled fetuin‐A visualize cells and mineral deposition, respectively. Magnesium supplementation markedly
Vytautas Kučikas   +6 more
wiley   +1 more source

Study on a countermeasure for high level sound generated from boiler tube bank duct using walls made of perforated plate (Grasp critical aperture ratio and influence of cavity volume on suppression effect)

open access: yesNihon Kikai Gakkai ronbunshu, 2017
Karman vortex shedding occurs when the gas passes through the duct with tube bank of the heat exchangers, such as gas heaters and boilers. Very high level sound in called “self-sustained tones” occurs due to the interference of the vortex and the sound ...
Kunihiko ISHIHARA
doaj   +1 more source

Driving Waveform Design of Electrowetting Displays Based on a Reset Signal for Suppressing Charge Trapping Effect

open access: yesFrontiers in Physics, 2021
Electrowetting display (EWD) device is a new type of reflective optoelectronic equipment with paper-like display performance. Due to the oil backflow phenomenon, it is difficult for pixels to be maintained a stable aperture ratio, so the grayscale of ...
Taiyuan Zhang, Yong Deng
doaj   +1 more source

Planar Solid‐State Nanopores Toward Scalable Nanofluidic Integration Based on CMOS Technology

open access: yesAdvanced Engineering Materials, EarlyView.
We present a scalable silicon‐based fabrication strategy for planar solid‐state nanopores to enable their integration with complex nanofluidic systems. Prototype devices demonstrate normal voltage‐current characteristics, good noise performance, and appreciable streaming currents. Our CMOS‐compatible fabrication process offers precise geometric control
Ngan Hoang Pham   +7 more
wiley   +1 more source

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