Results 31 to 40 of about 85,399 (116)

Evaluation of Geogrid-Aperture Size on the Behavior of Reinforced Fine-Sand Supporting a Square Footing [PDF]

Port Said Engineering Research Journal
Fine-sand soils cannot support the design loads due to their low load-bearing capacity. Soil reinforcement with geogrid-layers is a common technique to increase the low bearing capacity of fine-sand.
Essam BADRAWI ATTIA
doaj   +1 more source

Numerical Investigation of Influence of In-Situ Stress Ratio, Injection Rate and Fluid Viscosity on Hydraulic Fracture Propagation Using a Distinct Element Approach

Energies, 2016
Numerical simulation is very useful for understanding the hydraulic fracturing mechanism. In this paper, we simulate the hydraulic fracturing using the distinct element approach, to investigate the effect of some critical parameters on hydraulic ...
Bo Zhang, Xiao Li, Zhaobin Zhang, Yanfang Wu, Yusong Wu, Yu Wang   +5 more
doaj   +1 more source

Permeability Reduction and Electrochemical Impedance of Fractured Rock Grouted by Microbial-Induced Calcite Precipitation

Geofluids, 2020
The poor impermeability of fractured rock induced by excavation and construction is improved through the application of microbial-induced calcite precipitation (MICP), but it is difficult to monitor and evaluate the permeability reduction under a ...
Shuquan Peng, Kejia Zhang, Ling Fan, Jingyu Kang, Kang Peng, Fan Wang   +5 more
doaj   +1 more source

Influence of Grid Aperture Ratio on Electron Transmittance and Electron Beam Spot Size in Field Emission Processes of Carbon Nanotubes

Applied Sciences
Field emission is an important work mode for electron sources, and carbon nanotubes (CNTs) have been extensively studied for their good emission properties.
Yongbo Li, Xinchuan Liu, Shichao Feng, Yuanxun Li, Xiaodong Sun, Aiwei Wang, Ke Chen, Shenghan Zhou, Chi Li, Liye Zhao, Zhenjun Li   +10 more
doaj   +1 more source

A Multi-Stage Model for the Electromagnetic Shielding Effectiveness Prediction of an Infinite Conductor Plane With Periodic Apertures

IEEE Access, 2019
This paper focuses on the shielding effectiveness (SE) prediction of the periodic aperture array on an infinite conductor plane against a plane electromagnetic wave with its wavelength much larger than the size of a unit cell of the array.
Wanxin Bai, Anqi Guo, Tianle Li, Ruiqi Cheng, Chongqing Jiao   +4 more
doaj   +1 more source

Simulation of Water Entry Jet and Cavitation Characteristics of Hollow Projectiles

水下无人系统学报
In the water entry process of hollow projectiles, the formation of high-speed water jets is a crucial factor influencing their water entry. In order to study the influence of the through-hole aperture of hollow projectiles on jet and water entry ...
Junbang XIANG, Xiaoguang WANG, Huifeng KANG, Jialin XUAN, Liu YANG   +4 more
doaj   +1 more source

Comparative study on absorbing characteristics of aperture-type and patch-type FSS

Journal of Aeronautical Materials, 2020
Aperture-type and patch-type frequency selective surfaces (FSS) were prepared by using carbon fiber paper containing carbon fiber. Using honeycomb as the matching dielectric layer, microscopic characterization of carbon fiber distribution in carbon fiber
YUAN Xujiong, LIU Wenyan, WANG Yan, LU Zetao, ZHANG Youwei, HAN Muchou, LI Xiao, LIU Min   +7 more
doaj   +1 more source

Adaptive Enhancement Display of Chromatic Electrowetting Based on Color Conversion

IEEE Access
The charge capture of color inks in chromatic electrowetting electronic paper, the contact angle hysteresis and inconsistent aperture ratio result in a narrower color gamut and reduced contrast of the display screen.
Mingzhen Chen, Shanling Lin, Jianpu Lin, Zhixian Lin, Tailiang Guo   +4 more
doaj   +1 more source

Nonlinear Optical Characteristics of Crystal VioletDye Doped Polystyrene Films by Using Z-Scan Technique

Al-Mustansiriyah Journal of Science, 2017
Z-scan technique was employed to study the nonlinear optical properties (nonlinear refractive index and nonlinear absorption coefficient) for crystal violet doped polystyrene films as a function of doping ratio in chloroform solvent.
Mahasin F. Hadi, Eman Mohi Alwaan, Wafaa Hameed Abass   +2 more
doaj   +1 more source

An Analytical Study of the Diffraction of Light by a Circular Aperture Using Spherical Harmonics for n≤1

International Journal of Optics, 2020
Based on the importance of spherical harmonics and their applicability in many physical problems, this research aimed to study the diffraction pattern of light by a circular aperture starting from the first Rayleigh–Sommerfeld diffraction equation and to
Mahmoud Ahmad, Najah Kabalan, Samar Omran   +2 more
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