Results 21 to 30 of about 4,338,110 (346)

Energy Conversion Efficiency of Wavy Conical Wind Energy Capture Structure

open access: yesShanghai Jiaotong Daxue xuebao, 2023
In order to improve the energy harvesting efficiency of the wind energy capture structure, this paper proposes a novel wavy conical bladeless wind energy capture structure, and establishes a mathematical model for energy conversion of the wavy conical ...
ZOU Lin, YAN Yulong, TAO Fan, LIU Diwei, ZHENG Yunlong
doaj   +1 more source

Research on the ratio of multicomponent emulsion flooding system

open access: yesFrontiers in Energy Research, 2023
In recent years, field test and industrialized application of ASP (alkaline/surfactant/polymer) flooding has been carried out in oilfields, which has obtained an obvious effect on increasing oil and decreasing water and good economic efficiency. However,
Man Zhiqiang, Man Zhiqiang, Wu Wenxiang
doaj   +1 more source

Optimization of the Seismic Performance of a Steel-Concrete Wind Turbine Tower with the Tuned Mass Damper

open access: yesBuildings, 2022
To optimize the seismic performance of a new type of steel-concrete tower, a 120 m steel-concrete composite tower model with a tuned mass damper (TMD) was constructed in ABAQUS for simulation analysis.
Yanchao Yue   +4 more
doaj   +1 more source

Effects of Mass and Damping on Flow-Induced Vibration of a Cylinder Interacting with the Wake of Another Cylinder at High Reduced Velocities

open access: yesEnergies, 2021
Flow-induced vibration is a canonical issue in various engineering fields, leading to fatigue or immediate damage to structures. This paper numerically investigates flow-induced vibrations of a cylinder interacting with the wake of another cylinder at a ...
Md. Mahbub Alam
doaj   +1 more source

Study on Parameterization of Vortex-Induced Vibration Energy Harvester in Agricultural Environment

open access: yesAgriEngineering, 2020
In many special agricultural environments, many wireless sensors have a problem of power supply selection. Energy harvesting in the agricultural environment based on vortex-induced vibration (VIV) has the potential to solve the problem. In this paper, an
Zhangyi Liao, Anping Xiong, Renxin Liu
doaj   +1 more source

Seismic Resistance and Parametric Study of Building under Control of Impulsive Semi-Active Mass Damper

open access: yesApplied Sciences, 2021
When high-rise buildings are shaken due to external forces, the facilities of the building can be damaged. A Tuned Mass Damper (TMD) can resolve this issue, but the seismic resistance of TMD is exhausted due to the detuning effect.
Ming-Hsiang Shih, Wen-Pei Sung
doaj   +1 more source

Experimentally Measured Thermal Masses of Adsorption Heat Exchangers

open access: yesEnergies, 2020
The thermal masses of components influence the performance of many adsorption heat pump systems. However, typically when experimental adsorption systems are reported, data on thermal mass are missing or incomplete.
Kyle R. Gluesenkamp   +14 more
doaj   +1 more source

Numerical-relativity validation of effective-one-body waveforms in the intermediate-mass-ratio regime [PDF]

open access: yes, 2022
One of the open problems in developing binary black hole (BBH) waveforms for gravitational wave astronomy is to model the intermediate mass ratio regime and connect it to the extreme mass ratio regime. A natural approach is to employ the effective one body (EOB) approach to the two-body dynamics that, by design, can cover the entire mass ratio range ...
arxiv   +1 more source

The ratios of the light quark masses [PDF]

open access: yesPhysics Letters B, 1996
The paper collects the various pieces of information concerning the relative size of m_u, m_d and m_s. A coherent picture results, which constrains the mass ratios to a rather narrow range: m_u/m_d = 0.553 \pm 0.043, m_s/m_d = 18.9 \pm 0.8.
Heinrich Leutwyler, Heinrich Leutwyler
openaire   +3 more sources

Basin-scale control on N2O loss rate and emission in the Changjiang River network, China

open access: yesFrontiers in Marine Science, 2022
Global riverine N2O emissions have been made by several studies with great uncertainty. However, the regional N2O budgets and patterns in large river networks is still unclear, due to the lacking understanding of in-river N2O emission rate and well ...
Fang Wang   +7 more
doaj   +1 more source

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