Results 81 to 90 of about 113,868 (281)

Numerical Simulations of the Lagrangian Averaged Navier-Stokes (Lans-α) Equations for Forced Homogeneous Isotropic Turbulence [PDF]

open access: yes, 2001
The modeling capabilities of the Lagrangian Averaged Navier-Stokes-α equations (LANS-α) is investigated in statistically stationary three-dimensional homogeneous and isotropic turbulence. The predictive abilities of the LANS-α equations are analyzed by
Kosović, Branko   +3 more
core   +1 more source

Effect of Wedge-Shaped Deflectors on Flow Fields of Dual-Stream Jets [PDF]

open access: yes, 2007
The effect of wedge-shaped fan flow deflectors on the mean and turbulent flow-fields of dual-stream jets is investigated. Several wedge-shaped deflector concepts were used to create asymmetry in the plume of a dual-stream jet issuing from a scaled down ...
Papamoschou, Dimitri   +2 more
core   +1 more source

Multiple Unmanned Aerial Vehicle Formation Control through Deep Reinforcement Learning with Offline Sample Correction

open access: yesAdvanced Intelligent Systems, EarlyView.
Herein, a deep reinforcement learning‐based multi‐UAV formation control approach is proposed. By optimizing the utilization of historical data through correcting of offline samples, the past experience is better leveraged and learning performance is improved.
Zhongkai Chen   +4 more
wiley   +1 more source

Welded microstructure and orientation variation of duplex Ti alloy through electrodynamic vibration

open access: yesJournal of Materials Research and Technology, 2022
Duplex Ti alloys are widely used in the petrochemical industry as well as in the biomedical, aeronautics and astronautics engineering fields. A duplex Ti alloy weldment is uniform and has superior properties in terms of welded microstructure evolution ...
Chia-Heng Liu   +5 more
doaj  

High‐Entropy Engineering of O3‐Type Layered Cathodes for Long‐Cycle Life Sodium‐Ion Batteries

open access: yesChemistryEurope, EarlyView.
The disordered coordination environment in transition metals layer in high‐entropy oxides promotes the charge delocalization, enhancing the structural stability of the material and significantly improving its cycling stability. Sodium‐ion batteries (SIBs) are increasingly regarded as promising alternatives to lithium‐ion batteries (LIBs) due to their ...
Wendi Dong   +5 more
wiley   +1 more source

A New Fixed Axis-Invariant Based Calibration Approach to Improve Absolute Positioning Accuracy of Manipulators

open access: yesIEEE Access, 2020
This paper studies the calibration of industrial robots. Aiming at the problems of cumbersome industrial robot modeling and poor calibration effects, this paper proposes a new calibration method for determining the DH frame and DH parameters of ...
Pengfei Xiao   +4 more
doaj   +1 more source

Large scale optimization of transonic axial compressor rotor blades [PDF]

open access: yes, 2008
[First Paragraphs] In the present work the Multipoint Approximation Method (MAM) by Toropov et al. (1993) has been applied to the shape optimization of an existing transonic compressor rotor (NASA rotor 37) as a benchmark case.
Polynkin, A., Shahpar, S., Toropov, V.
core   +1 more source

Aligned Carbon Nanotube Polymer Nanocomposite Bipolar Plates Technology for Vanadium Redox Flow Batteries

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A novel manufacturing technique enables the fabrication of HACN‐BP, an advanced aligned CNT nanocomposite. By transforming VA‐CNTs into a highly dense structure (59% CNT vol.), HACN‐BP achieves outstanding electrical conductivity in both in‐plane and thickness directions while minimizing electrolyte permeability. When integrated into VRFBs, it enhances
Jae‐Moon Jeong   +8 more
wiley   +1 more source

In situ alloying strategy constructed Fe3Co–N–C electrocatalysts with designed 1D/3D hierarchical networks for rechargeable zinc–air battery

open access: yesInfoMat, EarlyView.
1D/3D dual carbon‐supported Fe3Co nitrogen carbides driven rechargeable zinc–air battery. Abstract Rechargeable zinc–air batteries (RZABs), emerged as a prospective energy conversion device, have garnered substantial attention from researchers over the past decades.
Yue Du   +12 more
wiley   +1 more source

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