Results 21 to 30 of about 1,833,163 (294)

Interlayer coherent composite Fermi liquid phase in quantum Hall bilayers [PDF]

open access: yes, 2009
Composite fermions have played a seminal role in understanding the quantum Hall effect, particularly the formation of a compressible `composite Fermi liquid' (CFL) at filling factor nu = 1/2. Here we suggest that in multi-layer systems interlayer Coulomb
B. I. Halperin   +5 more
core   +2 more sources

Preparation of ZnO/Brucite Functional Composite Powder by the Mechanochemical Method

open access: yesFrontiers in Materials, 2021
In this experiment, ZnO/brucite composite powder was prepared through the mechanochemical method; further, the properties, particle morphology, and structure of the composite powder were characterized. The results show that mechanical grinding action can
Huan Shuai   +4 more
doaj   +1 more source

Experimental and Numerical Study on the Strength of Repaired Steel Pipes with Composite Patches under Internal Pressure [PDF]

open access: yesMechanics of Advanced Composite Structures, 2023
Considering the old methods of maintenance and repair of oil and gas pipelines such as welding or replacing a part of the damaged pipeline which include high costs and spending a lot of time, the important usage of novel methods with lower costs such as ...
Azita Shafaee Fallah   +2 more
doaj   +1 more source

A Supersymmetric Composite Model of Quarks and Leptons [PDF]

open access: yes, 1996
We present a class of supersymmetric models with complete generations of composite quarks and leptons using recent non-perturbative results for the low energy dynamics of supersymmetric QCD. In these models, the quarks arise as composite "mesons" and the
Affleck   +16 more
core   +2 more sources

Tensile and Bending Strength Analysis of Ramie Fiber and Woven Ramie Reinforced Epoxy Composite

open access: yesJournal of Natural Fibers, 2021
This study aims to analyze the effect of the number of woven ramie layers (plies) and ramie fiber weight as reinforcement of composite on the tensile strength and bending strength.
Zulkifli Djafar   +2 more
doaj   +1 more source

Adaptive Speaker Recognition Based on Hidden Markov Model Parameter Optimization

open access: yesIEEE Access, 2020
The Hidden Markov Model (HMM) is a widely used method for speaker recognition. During its training, the composite order of the measurement probability matrix and the number of re-evaluations of the initial model affect the speed and accuracy of a ...
Yangjie Wei
doaj   +1 more source

The changing rules of the composite roughness in drainage pipelines with sediments

open access: yesWater Supply, 2023
The deposition of sediments with different roughness increases uncertainty in the prediction of effective Manning's n (also known as composite roughness).
Bin Sun   +4 more
doaj   +1 more source

The Preparation, Characterization, and Influence of Multiple Electroless Nickel-Phosphorus (Ni-P) Composite Coatings on Poplar Veneer

open access: yesBioResources, 2015
Nickel-Phosphorus (Ni-P) composite coatings were prepared on a poplar veneer surface via a simple electroless nickel (Ni) approach. The substrate deformation, flatness, crystalline structure, and wear resistance of the Ni-P composite coatings were ...
Yanfei Pan, Xin Wang, Jintian Huang
doaj   +1 more source

Study on computational efficiency of composite schemes for convection-diffusion equations using single-grid and multigrid methods

open access: yesJournal of Thermal Science and Technology, 2015
The computational efficiency of different composite schemes for the convection terms of the convection-diffusion equations is systematically studied in this paper.
Jingfa LI   +4 more
doaj   +1 more source

Microwave heating of ceramic composites [PDF]

open access: yes, 2000
The microwave heating of a ceramic composite is modelled and analysed. The composite consists of many small ceramic particles embedded in a ceramic cement.
Kriegsmann, Gregory A., Pelesko, John A.
core   +1 more source

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