Results 21 to 30 of about 5,032,170 (262)

Design and Optimization of Cross-corrugated Triangular Ducts Towards Reducing CO2 Emission and Improving Energy Efficiency

open access: yesAerosol and Air Quality Research, 2021
Reducing CO2 emission can effectively control global warming. And energy conservation is the most scientifical and systematical ways to reduce CO2 emissions. The total heat exchangers with membrane core, which consist of cross-corrugated triangular ducts
Zuoyi Chen   +6 more
doaj   +1 more source

Nonlinear cross Gramians and gradient systems [PDF]

open access: yes, 2007
We study the notion of cross Gramians for non-linear gradient systems, using the characterization in terms of prolongation and gradient extension associated to the system.
Jacquelien M. A. Scherpen   +5 more
core   +2 more sources

Model experiments on the influence of tunnel hood cross-sectional area on the reduction of the pressure gradient of the compression wavefront in high-speed railways

open access: yesMechanical Engineering Journal, 2023
Micro-pressure wave emission from tunnel portals in high-speed railways causes environmental issues. Tunnel hoods installed in the tunnel portals reduce the micro-pressure wave emission by reducing the pressure gradient of the compression wavefront ...
Takashi FUKUDA, Sanetoshi SAITO
doaj   +1 more source

The educational gradient in young singlehood: The role of gender and the gender climate

open access: yesDemographic Research, 2023
Background: Universities are described as "waiting halls" for union formation. However, little is known about the size of the educational gradient in single living after leaving home.
Lonneke van den Berg
doaj   +1 more source

The Framework of Cross-Domain and Model Adversarial Attack against Deepfake

open access: yesFuture Internet, 2022
To protect images from the tampering of deepfake, adversarial examples can be made to replace the original images by distorting the output of the deepfake model and disrupting its work.
Haoxuan Qiu, Yanhui Du, Tianliang Lu
doaj   +1 more source

In-Plane Instability of Parabolic Arches under Uniformly Distributed Vertical Load Coupled with Temperature Gradient Field

open access: yesAdvances in Civil Engineering, 2022
In civil engineering, arches, such as steel arch roofs and arch bridges, are often subjected to linear temperature gradient field. It is known that the in-plane instability of parabolic arches is caused by the significant axial force.
Zhenyu Pan   +6 more
doaj   +1 more source

Free Vibration Behavior of a Gradient Elastic Beam with Varying Cross Section

open access: yesShock and Vibration, 2014
Based on strain gradient elasticity theory, a finite element procedure is proposed for computation of natural frequencies for the microbeams of constant width and linear varying depth.
Mustafa Özgür Yayli
doaj   +1 more source

Three-Dimensional Time-Lapse Joint Inversion of Resistivity and Time-Domain Induced Polarization Methods

open access: yesApplied Sciences
The resistivity method and time-domain induced polarization (TDIP) method are two branches of electrical geophysical prospecting. In recent years, researchers have implemented time-lapse resistivity inversion and time-lapse TDIP inversion based on time ...
Depeng Zhu, Huan Ma, Youxing Yang
doaj   +1 more source

A Joint Numerical Simulation Method for Mine Seismic–Electric Coupling

open access: yesApplied Sciences
With the continuous increase in coal mining depth in China, concealed geological structures—such as collapsed columns and faults—pose a severe threat to mine safety by triggering water inrush accidents.
Guochuan Zhang   +4 more
doaj   +1 more source

The Influence Of Temperature Gradient On Stereological Parameters Of Carbide Phase On Cross-Section Of Abrasive Wear Resistant Chromium Cast Iron

open access: yesArchives of Metallurgy and Materials, 2015
In the paper analysis of temperature gradient and parameters of structure on casting cross-section of abrasive wear resistant chromium cast iron at carbon content of 2,5%wt. and chromium 17%wt. with nickel and molybdenum additives are presented.
Studnicki A.   +3 more
doaj   +1 more source

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