A new design approach of dual-band polarization and pattern diversity antenna for vehicle communications is presented. This consists three essential parts: monopole array, swastika-shaped gap-coupled patch, customized L-shaped driven dipole. First, the array composed four monopoles beneath patch excited by dipole-induced mode so as to realize a bidirectional beam in upper band. Second, reused main radiator lower band achieve wideband broadside right-handed circular (RHCP) radiation, which...

This communication presents a compact, low-profile, wideband, polarization-reconfigurable antenna with right-handed circular polarization (RHCP), left-handed (LHCP), and linear (LP) diversity. The consisting of quadruple identical gap-coupled square patches possesses dual wideband degenerate modes, which could be properly allocated by controlling ON/OFF states four p-i-n diodes integrated into an overlying specially engineered driven element to dynamically produce RHCP, LHCP, LP radiations....

A new design method to significantly expand the axial ratio (AR) bandwidth of a single-fed, low-profile circularly polarized (CP) antenna without relying on any complex feed network or occupying large transverse dimension is presented. First, four small patches arranged in chessboard pattern are utilized as main radiator, and meanwhile, cross slot with unequal lengths adopted excite triple sequentially orthogonal modes, aiming attain two CP modes (AR <sub...

Compact series-fed microstrip patch arrays are presented that excited with Dolph-Chebyshev distributions realized periodic stub-loaded slow wave transmission line (SW-TL) feed networks. The methodology to design these SW-TL networks is described in detail. developed equivalent circuit representation reveals their characteristic impedance can be modulated while maintaining propagation constant (guided-wavelength) simply by modifying the widths of stubs. These seamlessly integrated uniformly...

Background: To assist doctors to diagnose mild cognitive impairment (MCI) and Alzheimer's disease (AD) early accurately, convolutional neural networks based on structural magnetic resonance imaging (sMRI) images have been developed shown excellent performance. However, they are still limited in their capacity extracting discriminative features because of large sMRI image volumes yet small lesion regions the number images.Methods: We proposed a task-driven hierarchical attention network...

Visual monitoring is currently a research hotspot in the of laser welding. In this paper, an active coaxial system for keyhole welding built. This reduces intense light interference caused by laser, plasma plume, and specular reflection molten pool. The significant differences temperatures joint, keyhole, pool are also overcome. Images that include clear penetration hole, joint captured single-sensor system. ratio hole area to fault-tolerant disposal based on permissive scope used propose...

The Internet of Things Wireless Sensor Networks (IOTWSNs) are crucial in modern smart systems, where self-organizing sensor nodes enable efficient and flexible network structures for applications like environmental monitoring cities. task allocation problem IOTWSNs is NP-hard, making effective strategies essential optimal performance. This paper proposes an improved artificial jellyfish search algorithm (CECJS) that integrates chaotic initialization, elite, cloning to enhance global ability...

A pattern-reconfigurable, vertically polarized (VP), electrically small (ES), Huygens source antenna (HSA) is demonstrated. custom-designed reconfigurable inverted-F structure embedded in a hollowed-out cylindrical dielectric resonator (DR). It radiates VP electric dipole fields that excite the DR’s HEM11δ mode, which turn acts as an orthogonal magnetic radiator. The HSA’s unidirectional properties are thus formed. becomes low-profile and through significant lowering of its operational...

A miniaturized, high-gain, circular polarization (CP) -reconfigurable antenna implemented by a slow-wave transmission line (SW-TL)-based annular ring is developed. First, the detailed configuration of CP-reconfigurable antenna, together with its biasing circuit, presented. Then, working mechanism CP radiation and miniaturization comprehensively revealed illustrating evolution process from conventional linearly polarized antenna. Furthermore, resonant frequency miniaturized SW-TL-based...

This article proposes several low-profile metasurface-based compartment shielding diaphragms for the high-speed and highly integrated circuits located in space-limited cavities. It was demonstrated that capacitive metasurface (CMS) inductive (IMS) partially filled cross section of cavities can generate new transverse electric magnetic resonance modes, which are orthogonal to TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</sub> mode...

A bandwidth-enhanced, electrically small, planar, endfire-radiating Huygens dipole antenna (HDA) is presented. The near-field resonant parasitic (NFRP) grid-shaped and two concentric interdigitated capacitor (IDC) loaded loops enable broad electric magnetic responses, respectively. Benefiting from the additional capacitance introduced by dual-loop design, response achieved at a lower frequency. consequent balanced, responses of NFRP elements yield wideband small HDA with performance...

An omnidirectional, vertically polarized (VP), wideband, electrically small near-field resonant parasitic (NFRP) filtenna is presented. First, a specially-engineered tridimensional inverted-F structure developed as the driven element to replace feed copper pin of shorted top-hat loaded monopole, forming new NFRP VP antenna with smaller size, wider fractional bandwidth (FBW), and radiation null in low frequency band edge. Next, pair C-shaped slots are etched on further expand FBW through...

This paper is concerned with calculating the phase stability of a stable cable multi-physics coupling simulations. A three-dimensional electromagnetic-thermal-flow-mechanics model established to simulate operating in air. The simulation results demonstrate that electric field distribution corrugated shows differences from normal coaxial around outer conductor, i.e., stronger sharp points conductor than blunt points, which elevates voltage endurance requirement and risk breakdown during...

Inspired by the coupled-layer construction of X-Cube model, we introduce Floquet code, a dynamical quantum error-correcting code where number encoded logical qubits grows with system size. The is defined on three-dimensional lattice, built from intersecting two-dimensional layers in $xy$, $yz$, and $xz$ directions, consists periodic sequence two-qubit measurements which couple together. Within single cycle, codespace switches between that fracton order entangled, toric codes. qubits'...

Certain pure-state symmetry-protected topological orders (SPT) can be used as a resource for transmitting quantum information. Here, we investigate the ability to transmit information using decohered SPT states, and relate this property "strange correlation functions" which diagnose many-body in these mixed-states. This perspective leads identification of class channels -- termed symmetry-decoupling do not necessarily preserve any weak or strong symmetries state, but nevertheless protect...

Abstract Changes in the soil freeze–thaw status will inevitably affect thermal conditions and properties of Tibetan Plateau (TP), thereby affecting its upper atmosphere, further afield East Asia even globally. In this study, using temperature simulated by Community Land Model Version 5.0 (CLM5.0), timing duration were divided into freeze start‐date, end‐date duration. Then, linear trend estimation, correlation analysis other methods, changes spatiotemporal distribution from 1979 to 2018 over...

Abstract Quantum flutter is a ubiquitous phenomenon which can be observed from the fast moving impurity&amp;#xD;injected into fermionic or bosonic medium of quantum liquid. In this scenario, one usually consider&amp;#xD;a fully polarized state and inject spin-flipped impurity as initial state. When the&amp;#xD;initial velocity beyond intrinsic sound medium, impurity&amp;#xD;momentum dramatically exhibits long-lived periodic oscillation with periodicity remaining&amp;#xD;invariant respect to...