Results 31 to 40 of about 43,905 (182)

Research of impact of two kinds of check valve on vibration characteristics of long pipeline

open access: yesGong-kuang zidonghua, 2015
In order to study implementation effect of different check valves, vibration test was conducted in testing systems equipped with spring-loaded passive check valve and hydraulic active check valve respectively.
LYU Fuyan   +5 more
doaj   +1 more source

A new approach to quantum backflow [PDF]

open access: yes, 2005
We derive some rigorous results concerning the backflow operator introduced by Bracken and Melloy. We show that it is linear bounded, self adjoint, and not compact.
Bogolubov N N   +11 more
core   +1 more source

Enhanced nitrification and denitrification by means of backflow without sludge

open access: yes上海师范大学学报. 自然科学版, 2020
Municipal wastewater treatments were mainly carried out by activated sludge currently, for which anoxic/oxic(A/O) was widely accepted to enhance nitrogen(N)removals.In this process, wastewater flows back and forth between A and O tanks together with ...
LU Qinyuan   +4 more
doaj   +1 more source

An Optimized Control Method of Soft-Switching and No Backflow Power for LLC Resonant-Type Dual-Active-Bridge DC-DC Converters

open access: yesMathematics, 2023
The LLC-type resonant dual-active-bridge (LLC-DAB) DC-DC converter with a high voltage gain, high power density, and low backflow power has attracted increasing attention in recent years.
Zimeng Li   +5 more
doaj   +1 more source

Backflow Power Optimization of DAB Based on Asymmetric Duty Cycle and Internal Phase Shift Control

open access: yesIEEE Access, 2023
Dual active bridge (DAB) converter with single-phase-shifting (SPS) control would produce large backflow power when voltage regulation ratio deviates from 1 or under light load, an asymmetric duty cycle and internal phase shift (ADIPS) control was ...
Fei Xie, Hao Wang, Jie Shu
doaj   +1 more source

Experimental Study on Backflow Patterns Induced by a Bilateral Groin Pair with Different Spacing

open access: yesApplied Sciences, 2021
Groins are one of the popular manmade structures to modify the hydraulic flow and sediment response in river training. The spacing between groins is a critical consideration to balance the channel-depth and the cost of construction, which is generally ...
Cuiping Kuang   +4 more
doaj   +1 more source

Non-divisibility vs backflow of information in understanding revivals of quantum correlations for continuous-variable systems interacting with fluctuating environments [PDF]

open access: yes, 2015
We address the dynamics of quantum correlations for a bipartite continuous-variable quantum system interacting with its fluctuating environment. In particular, we consider two independent quantum oscillators initially prepared in a Gaussian state, e.g. a
Paris, M. G. A., Trapani, J.
core   +2 more sources

Quantum backflow for many-particle systems

open access: yes, 2020
Quantum backflow is the classically-forbidden effect pertaining to the fact that a particle with a positive momentum may exhibit a negative probability current at some space-time point. We investigate how this peculiar phenomenon extends to many-particle
Barbier, Maximilien
core   +1 more source

Benchmark Quantum Monte Carlo calculations of the ground-state kinetic, interaction, and total energy of the three-dimensional electron gas [PDF]

open access: yes, 2010
We report variational and diffusion Quantum Monte Carlo ground-state energies of the three-dimensional electron gas using a model periodic Coulomb interaction and backflow corrections for N=54, 102, 178, and 226 electrons.
Brown M D   +6 more
core   +3 more sources

Numerical study and experimental validation of a Roots blower with backflow design

open access: yesEngineering Applications of Computational Fluid Mechanics, 2018
A three-dimensional computational fluid dynamics (CFD) model of a Roots blower with a backflow design was established to analyse the effects of the backflow on the Roots blower's performance.
Shu-Kai Sun   +3 more
doaj   +1 more source

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