While auxetic metamaterials exhibit impressive mechanical traits, they frequently grapple with inherent conflict between their stiffness and auxeticity. In this study, we introduced an optimized lozenge-chiral metamaterial (oLCAM) the dual objectives of balancing auxeticity achieving tunable properties concurrently. The performance proposed oLCAM was first compared that conventional lozenge (cLAM) through both experimental numerical studies. Herein, transition (Etrans) initially as typical...

A compact broadband Gysel power divider with arbitrary power-dividing ratio is proposed. This derived from the conventional by substituting an ideal phase inverter for 180 <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex Notation="TeX">$^{\circ}$</tex></formula> shifter, which significantly improves bandwidth and reduces circumference to 1 Notation="TeX">$\lambda_{g}$</tex></formula> evaluated at center frequency....

This paper introduces a nested sinusoidal re-entrant (NSR) metamaterial characterized by tunable complete bandgaps (CBGs) and dynamic responsiveness in thermal-mechanical dual fields. NSR comprises shape memory polymer features modification with hexagonal star-shape structure. Dynamic response of is studied using the representative volume element method, specifically focusing on effective modulus Poisson's ratio CBGs under varying average strains. The findings indicate that both mechanical...

HfO2-ZrO2 superlattice (SL) ferroelectric (FE) ultrathin films exhibit significant improvement in endurance performance compared with solid-solution HfxZr1−xO2 (HZO). Despite the experimental evidence, underlying microscopic mechanisms of enhanced reliability SL remain elusive. This Letter explores mechanism by performing first-principle calculations on and HZO systems. The can be well explained higher oxygen vacancy (Vo) migration energy barriers along FE polarization direction, which slow...

In this study, the influence of TiO <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$_{\text{2}}$</tex-math> </inline-formula> seed layers in ferroelectric capacitors with HfZrO notation="LaTeX">$_{\textit{x}}$</tex-math> (HZO) solid-solution and HfO /ZrO superlattice structures has been explored. Due to insertion layer, significant enhancement properties reduction coercive field (...

Shallow gas, with huge resources, has been confirmed using three dimensional (3D) seismic data and more than 20 drilling sites in the deep water of LS36 gas field, Qiongdongnan Basin, South China Sea. The interface sedimentary facies southern boundary basin controls distribution within clastic sediments coming from north west land uplifted. In this study, geophysical attributes were used to investigate controlling effect on shallow basin. Our study shows that is mainly distributed Quaternary...

A novel method is presented for the design of a multiband power divider. The employs network theory and even–odd-mode analysis to derive equivalent input output port admittances three-port junction, which based on conditions reciprocity, isolation, matching. If an impedance transformer that transforms admittance normalized unit conductance at multiple frequencies found, then divider can be constructed by attaching each junction. To verify proposed method, three different tri-band dividers...

Metamaterials (MTMs) are very promising in engineering applications because they can be used to easily manipulate the spatial and temporal distributions of electromagnetic fields waves. Nevertheless, studies on MTMs have been directed primarily toward high-frequency electromagnetics optics. Consequently, development for low-frequency still face some bottleneck problems challenges. For example, deteriorated resonance strength large unit dimensions inevitable MTM cells. Moreover, existing...

Eddy current testing (ECT) is one of the most important techniques in nondestructive evaluation. A higher probe sensitivity always pursued ECT. To improve sensitivity, near electrical resonance signal enhancement (NERSE) technique was recently proposed. In NERSE technique, a coaxial cable connecting with coil introduced to provide capacitance for resonance. However, long awkward and inconvenient engineering applications, restraining usability such probes. Metamaterials (MTMs) are novel...

Physics-informed neural network (PINN) has shown great potential in inverse and parametric designing problems electrical engineering. Moreover, most existing works on PINN are dedicated to computational fluids, very little attention been paid static low-frequency electromagnetic near fields with multiple media engineering applications. In this work, a for solving 2-D magnetostatic devices systems is proposed. The magnetic field intensity the vector solved by training (NN) which encodes...

We have experimentally demonstrated that the ferroelectricity can be controlled by reversibly injecting oxygen vacancies ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${V}_{\text {o}}{)}$ </tex-math></inline-formula> from interfacial layer (IL) of TiOxNy to Hf notation="LaTeX">$_{{0}.{5}}$ Zr0.5O2(HZO) or extracting them HZO IL in titanium nitride (TiN) notation="LaTeX">$/$ TiN structure for first time....

Metamaterials (MTMs) with extraordinary electromagnetic properties are recently applied to wireless power transfer (WPT) systems improve transmission efficiency. Although theoretical progress has been made on MTMs in low frequency near field, the operation of most WPT (usually MHz), design still utilizes model used high-frequency applications. Therefore, a practical MHz band is proposed this work. The resonance and quality factor describe characteristics an MTM slab. field then modeled as...

Due to the inherent errors during fabrication process, frequency selective surface (FSS) technique suffers high-dimensional uncertainties, which is especially severe for conformal scenarios. This necessitates introduction of an effective uncertainty quantification (UQ) technique. To be specific, transmission and reflection coefficients change not only vastly but nonsmoothly with respect random input variables. fact excessively increases difficulty a UQ tackle this problem, we proposed...

A physics-based model and its corresponding solution methodology for the mobile-ionic (MI) dielectrics exhibiting charge–voltage ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$Q$ </tex-math></inline-formula> – notation="LaTeX">$V$ ) hysteresis behaviors are proposed based on ion drift-diffusion (IDD) equations coupling with Poisson's equation. The captures dynamic distribution of mobile ions'...

Purpose The purpose of this paper is to develop a modeling method for the analysis low-frequency metamaterials (MTMs) and their near-field applications. Design/methodology/approach Euler–Lagrange introduced. An MTM modeled as multi-degree-of-freedom system without homogenization. properties responses in device are readily rigorously studied through motion equation derived from Lagrange equations. resonance frequencies corresponding modes solved characteristic equation. Findings numerical...

Magnetic metamaterials exhibit extraordinary electromagnetic properties and have shown great potential in low-frequency near-field applications. A device or system is consisted of different natural media metamaterials, it essential to develop a numerical methodology compute the transient response such system. However, most existing works are dedicated high-frequency wave propagation problems, whereas study for magnetoquasistatic (MQS) fields still blank challenging. In this regard,...