Results 1 to 10 of about 3,449 (143)

Research on the plugging mechanism in fractured formations and the drilling fluid system for while-drilling leak prevention [PDF]

Scientific Reports
During drilling operations, when fracture-induced lost circulation occurs, the unclear sealing mechanisms often lead to reliance on empirical methods for plugging without targeted strategies.
Jianwei Zhang, Siyu Tian, Xiang Wang, Fuping Feng, Xu Han, Yan Zhou, Lei Qiao, Jiping Ding   +7 more
doaj   +2 more sources

Marshall stability of porous asphalt mixture incorporating kenaf fiber [PDF]

Archives of Civil Engineering, 2022
Porous asphalt mixture (PA), known as open-graded surfaces over a stone bed underneath, allows water to go through. These factors can affect the porous asphalt mixture adhesive strength.
Nur Ezreen Jasni, Khairi Azman Masri, Ramadhansyah Putra Jaya, Mohd Mustafa Al Bakri Abdullah, Rafiza Abd Razak, Marcin Nabiałek, Katarzyna Błoch, Agata Śliwa   +7 more
doaj   +1 more source

Static Buckling of 2D FG Porous Plates Resting on Elastic ‎Foundation based on Unified Shear Theories‎ [PDF]

Journal of Applied and Computational Mechanics, 2023
This article develops a mathematical model to study the static stability of bi-directional functionally graded porous unified plate (BDFGPUP) resting on elastic foundation.
Amr E. Assie, Salwa M. Mohamed, Rabab A. Shanab, Rasha M. Abo-bakr, Mohamed A. Eltaher   +4 more
doaj   +1 more source

Mathematics and practice of color space invariants by the example of determining the gray balance for a digital printing system [PDF]

Компьютерная оптика, 2020
In modern printing, a large number of tasks are associated with the mutual transformation of color spaces. In particular, the most common pair of hardware-dependent color spaces is RGB and CMYK, the mutual transformation of colors in which is ambiguous ...
Dmitry Tarasov, Oleg Milder
doaj   +1 more source

Free Vibration Characteristics of Bidirectional Graded Porous Plates with Elastic Foundations Using 2D-DQM

Mathematics, 2022
This manuscript develops for the first time a mathematical formulation of the dynamical behavior of bi-directional functionally graded porous plates (BDFGPP) resting on a Winkler–Pasternak foundation using unified higher-order plate theories (UHOPT). The
Ammar Melaibari, Salwa A. Mohamed, Amr E. Assie, Rabab A. Shanab, Mohamed A. Eltaher   +4 more
doaj   +1 more source

Static Response of 2D FG Porous Plates Resting on Elastic Foundation Using Midplane and Neutral Surfaces with Movable Constraints

Mathematics, 2022
The current manuscript develops a novel mathematical formulation to portray the static deflection of a bi-directional functionally graded (BDFG) porous plate resting on an elastic foundation.
Ammar Melaibari, Salwa A. Mohamed, Amr E. Assie, Rabab A. Shanab, Mohamed A. Eltaher   +4 more
doaj   +1 more source

Visual integration in the combination of the methods of hammering and sawing in metalwork [PDF]

Journal of Architecture, Art & Humanistic Science, 2023
The two methods of hammering and sawing have been chosen to be the basis for the formulation of the metalwork in this paper, and the complementary relationship arising from the coupling of two different techniques in forming, where the combination of ...
Amany Nagy
doaj   +1 more source

Design and Evaluation of Ultra-Thin Overlay with High Viscosity and High Elasticity

Engineering Proceedings, 2023
Ultra-thin asphalt overlay, which is considered one of the main pavement maintenance strategies, has been widely used to maintain and restore pavements. However, the structural properties of traditional ultra-thin overlay materials, such as anti-friction
Yijia Chen, Zhi Liao, Lide Chen, Tao Ma, Susan Tighe, Ningyuan Li   +5 more
doaj   +1 more source

Enhanced photocatalytic activity for degradation of ofloxacin and dye by hierarchical flower-like ZnS/MoS2/Bi2WO6 heterojunction: Synergetic effect of 2D/2D coupling interface and solid sulfide solutions

Catalysis Communications, 2022
To strengthen the photocatalytic degradation of antibiotics and organic dyes, the band structure engineering serves as an efficient approach, which can be realized by constructing heterostucture photocatalysts.
Dan Liu, Jian Gong, Congting Sun, Lanlan Xu, Youtao Song   +4 more
doaj   +1 more source

Accuracy of the Copernicus High-Resolution Layer Imperviousness Density (HRL IMD) Assessed by Point Sampling within Pixels

Remote Sensing, 2022
The Copernicus high-resolution layer imperviousness density (HRL IMD) for 2018 is a 10 m resolution raster showing the degree of soil sealing across Europe. The imperviousness gradation (0–100%) per pixel is determined by semi-automated classification of
Geir-Harald Strand
doaj   +1 more source