The posterior mandible is the primary area for occlusal function. However, long-term tooth loss in often leads to rapid absorption of both buccal and lingual trabecular bone plates subsequent atrophy alveolar ridge. This ultimately results horizontal deficiencies that complicate achieving an optimal three-dimensional placement dental implants. Conventional techniques employed clinically augmentation have limited efficacy, cause significant surgical trauma, require extended treatment...

Personalized porous scaffold materials for bone defect repair, with adjustable mechanical strength and porosity via 3D printing technology, have made significant strides in the tissue engineering. However, their ability to regulate angiogenesis processes at site remains constrained, hindering effective coupling of angiogenesis-bone regeneration. In this study, we incorporated Nb2C MXene as a photothermal agent enhancer both osteogenesis, embedded into poly (lactic-co-glycolic...

In this letter, a 3-D subgridding finite-difference time-domain (FDTD) approach is proposed. The calculation domain divided into regions with dense meshes and coarse meshes. By applying the proposed technique to grid regions, memory computation resources can be significantly reduced. Furthermore, Courant–Friedrich–Levy (CFL) limitation of mesh broken by one-step leapfrog alternately direction-implicit (ADI)-FDTD. Coarse adopt uniform time step, which limited only standard FDTD CFL condition...

Thermoelectricity has been recognized as an environmentally friendly energy conversion technology due to its ability directly achieve between heat and electricity for a long time. β ‐Zn 4 Sb 3 attracted considerable interest promising thermoelectric material in the moderate temperature range (500 K–900 K), which is of most industrial waste sources. In this paper, first we present structure traditional doping strategy used enhance performance. Next, review details some new methods utilized...

Difference frequency generation (DFG) is an essential phenomenon for generating far-infrared (FIR) and broadband terahertz (THz) waves, which cannot be generated by either alternating current flow-driven antennas microwave source or pumped materials higher lights. Metallic nonlinear metasurfaces (NLMSs) as a new platform THz sources were intensively developed. In this work, nondepleted time-domain model derived from the Maxwell-hydrodynamic proposed where linear responses in metallic...

Abstract：In order to meet the needs of space mission, application deployable membrane antenna is very urgent, and it developing large aspect ratio, high precision lightweight.A kind parabolic cylindrical folding mechanism with multi tape-spring hinges proposed.The mainly composed hinges, a triangular prism mast, transverse ribs, synchronous cable net.The mast can fold longitudinally ribs along cross section.The modular design based on elastic potential energy stored at longitudinal...

Titanium with surface nanostructure has superior mechanical and biological properties, which benefits titanium implants. To further improve the bioactivity of Ti surfaces, Ca/P-containing porous titania coatings were prepared on by ultrasonic shot peening (USP) micro-arc oxidation (MAO). The phase identification, composition, morphology microstructure during MAO investigated subsequently. amounts Ca, P Ca/P ratio formed greater than those coarse-grained Ti. Incubated in a simulated body...

With the development of space industry and demand future complex missions, large deployable antennas require high ratio, precision, lightweight. A parabolic cylindrical (PCD) mechanism with a multilayer tape-spring (MLTS) hinge was proposed. The energy method adopted to establish equivalent dynamic model PCD MLTS hinges. new problems encountered in analysis are solved. First, nonlinear effects hinges cable were considered. relationship equations strain kinetic derived. Then, stiffness mass...

Graphene has unique two-dimensional nanostructure with high specific surface areas, superior mechanical properties which promising applications for the development of performance nanocomposite materials. Most previous work on graphene nanocomposites addresses polymer matrix. In present work, we have fabricated zirconia and (ZrO 2 /GNS) by simple mixing pressureless sintering process. Microstructural observations composite show homogeneous random distributions nanosheet in Scanning electronic...

Tensegrity structures are drawing the attention of architects and engineers due to their remarkable configurations. They have inextensional mechanisms, yet they stable. The determination connectivity patterns compression bars tension cables is a key design tensegrity structures. In this paper, discrete optimization model for form-finding was developed, converted into modified travelling salesman problem (TSP). ant colony system (ACS) used search feasible solutions, where all given nodes were...

Abstract The finite‐difference time‐domain (FDTD) method often demands numerous grids for fine structure analysis, leading to high computational costs. To address this challenge, a subgridding scheme emerges as an attractive solution. However, the explicit nature of FDTD subgrid method, constrained by Courant–Friedrichs–Lewy (CFL) conditions, can lead inefficiencies with complex structures. In response, leapfrog alternating‐direction implicit (ADI)‐FDTD exhibiting unconditional stability,...

This letter proposes a novel parallelized three-dimensional finite-difference time domain (FDTD) method for solving Maxwell's equations in the domain. Our approach leverages efficient decomposition methods on face-centered cubic (FCC) grid, resulting significant efficiency improvement comparison to sequential time-domain (FCC-FDTD) method. To quantify this enhancement, we evaluate performance metrics such as speedup factor and parallel by comparing computation times against serial FCC-FDTD...

We propose and discuss a simple method to generate broadband optical vortices, utilizing the inherent topological vortex structures of polarization around bound states in continuum supported by photonic crystal slab momentum space induce generation beams. Since proposed structure is composed silicon pillars arranged periodically, it lacks true geometric center. It insensitive position incident light does not require specific alignment process compared traditional spiral phase plates....

This paper presents a comprehensive study on the properties of strain-compensated In_1-x-yGa_xAl_yAs/In_1-x-yGa_xAl_yAs quantum wells matched in InP substrate for 1654nm VCSELs. The physical are studied. We executed an in-depth concerning gain characteristics different well structures VCSELs, then candidate combinations obtained. In addition, gain-carrier selected also results show that structure,...

Contrary to the local response approximation (LRA), electromagnetic of subnanometer particles and antennas is influenced by nonlocal arising from free electron spill-out effect. A generalized optical (GNOR) has been successful in explaining unusual frequency shifts spectral bandwidth broadening mechanisms, which cannot be captured LRA models. This article presents a comprehensive finite-difference time-domain (FDTD) implementation Maxwell-hydrodynamic model with GNOR term interaction between...

The aging behaviors of Cu–Cr alloys in the early stage at different temperatures are investigated by molecular dynamics simulations. First principles potentials used for interactions between Cu and Cr atoms. initial behavior precipitation is characterized transmission electron microscope energy disperse spectroscopy. results showed that supersaturated solid solution thermodynamically unstable. mean-square displacements atoms to describe diffusivity. At room temperature, only show harmonic...