33 Result(s)
within
Ri**ang Zhu
Physics
Nanotechnology
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Article
On the fluid drag reduction in scallop surface
In the field of biomimetics, the tiny riblet structures inspired by shark skin have been extensively studied for their drag reduction properties in turbulent flows. Here, we show that the ridged surface textur...
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Article
The ceramics based on (Bi0.5Li0.5)0.9Sr0.1ZrO3-doped K0.44Na0.55Ag0.01Nb0.95Ta0.05O3 exhibit enhanced structural and electric properties
Currently, in the modification methods of K0.5Na0.5NbO3(KNN) ceramics to enhance their piezoelectric performance, key parameters such as Curie temperature are usually sacrificed. However, this trade-off limits th...
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Article
Nanoarchitectonics of yttrium-doped barium cerate-based proton conductor electrolyte for solid oxide fuel cells
As the third generation of fuel cells, solid oxide fuel cell (SOFC) provides a clean and low-pollution technology. Electrolyte material, which often plays a vital role in SOFC, has always been the focus and di...
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Article
Highly efficient hydrogen production performance of g-C3N4 quantum dot-sensitized WO3/Ni–ZnIn2S4 nanosheets
Metal sulfide semiconductor photocatalysts have been widely used in photocatalytic hydrogen evolution reactions due to their good light absorption properties and high photostability. However, the metal sulfide...
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Article
Ultra-wideband and wide-angle linear-to-circular polarizer based on single-layer dielectric substrates
In this paper, a wideband and wide-angle transmissive linear-to-circular polarization converter (LCPC) working in the C, X and Ku bands is proposed, which is based on a single-layer dielectric substrate. In or...
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Article
Numerical predictions for the effective electrical properties of flexoelectric composites with a single inclusion
The direct flexoelectricity in dielectrics, as an electromechanical mechanism coupling electric field and strain gradient, exhibits strong size dependence and structures associated. In the present paper, the e...
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Article
Study on the relaxation mechanism of residual stress in SiCp/6061Al composites based on the surface modification of reinforcement
The effect of reinforcement surface modification on the residual stress (RS) in 35vo l%SiCp/6061Al composites was studied, and the experimental conclusions were verified by finite element analysis. The results...
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Article
Modeling and simulation of functionally graded flexoelectric micro-cylinders based on the mixed finite element method
The direct flexoelectricity in solid dielectrics, as an electromechanical mechanism coupling polarization and strain gradient, exhibits strong size dependence and structures associated (geometry or microstruct...
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Article
Modeling of dendrite arm fragmentation and dendrite arm coarsening⋆
A two-dimensional quantitative cellular automaton (CA) model is employed to simulate dendrite arm fragmentation and dendrite arm coarsening in mushy zones. The phenomenon of dendrite arm fragmentation of an Al...
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Article
Modeling of free dendritic growth in a gravity environment by lattice Boltzmann method
A two-dimensional model is developed to simulate dendrite growth and movement in a gravity environment. The model combines the features of cellular automaton and lattice Boltzmann methods. Two sets of distribu...
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Article
Cellular automaton modeling of peritectic transformation⋆
A two-dimensional multiphase cellular automaton (CA) model is proposed for the prediction of growth kinetics and microstructural evolution during peritectic transformation of Fe-C alloys. The proposed model is...
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Article
Competitive dendrite growth during directional solidification of a transparent alloy: Modeling and experiment
A two-dimensional (2-D) cellular automaton-finite difference method (CA-FDM) model and in situ observation experiments of directional solidification using a transparent alloy of SCN-2wt.% ACE are employed to inve...
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Article
Simultaneous melting and solidification of a columnar dendritic microstructure in a temperature gradient: Numerical modeling and experiments⋆
The microstructural evolution of a SCN-ACE alloy in a temperature gradient is studied by cellular automaton (CA) modeling and in situ experiments. The initially columnar dendrites gradually evolve to a completely...
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Article
WO3 nanosheets/g-C3N4 nanosheets’ nanocomposite as an effective photocatalyst for degradation of rhodamine B
A novel WO3 nanosheets (WO3 NS)/g-C3N4 Nanosheets’ (g-C3N4 NS) nanocomposite photocatalyst was fabricated through a simple calcination process. WO3 NS was first prepared with the aid of P123 lamellar micelles and...
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Article
Intrinsic evolution of novel (Nd, MM)2Fe14B-system magnetic flakes
The Nd-substituted (Nd x MM1−x )–Fe–B strip-casting flakes were prepared by induction melting in the vacuum furnace and then subsequently by strip-casting technol...
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Article
Erratum to: Non-uniform shrinkage of multiple-walled carbon nanotubes under in situ electron beam irradiation
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Article
Non-uniform shrinkage of multiple-walled carbon nanotubes under in situ electron beam irradiation
Instability of multiple-walled carbon nanotubes (MWCNTs) was investigated by in situ transmission electron microscopy at room temperature. Specially, the non-uniform shrinkage of tubes was found: The pristine ...
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Article
Synthesization of SnO2-modified carbon nanotubes and their application in microbial fuel cell
The aim of this work was to study the synthesization of SnO2-modified carbon nanotubes and their application in microbial fuel cell. With the chemical vapor deposition technique, carbon nanotubes growing in situ ...
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Article
Omnidirectional wireless power transfer system supporting mobile devices
An efficient method for the challenge design of an omnidirectional wireless power transfer system (OWPT) is proposed. The OWPT is realized utilizing the rotating magnetic field, which is generated by the propo...
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Article
An enhancement of reflection loss by controlling the reflected electromagnetic wave at air–absorber interface
This study explores the improvement of the reflection loss (RL) by controlling the reflected wave from air–absorber interface (AAI) . The reflected wave from AAI increases for a hybrid system consisted of flak...
