In this letter, an ultrawideband (UWB) multiple-input-multiple-output (MIMO) antenna using a novel fence-type decoupling structure, which has high isolation in the UWB, is presented. The MIMO design consists of two half-cutting UWB units that have good low-frequency impedance-matching performance because use rectangular slot on radiation patch. Meanwhile, operating band enhanced by introducing structure at ground antenna. Furthermore, L-shaped parasitic branches are designed to heighten...

This paper mainly investigated the effect of Mn/Ag ratio on microstructure and room temperature high-temperature (350 °C) tensile mechanical properties as-cast heat-treated Al-6Cu-xMn-yAg (x + y = 0.8, wt.%) alloys. The alloy has α-Al, Al2Cu, a small amount Al7Cu2 (Fe, Mn) Al20Cu2 (Mn, Fe)3 phases. After T6 heat treatment, massive dispersive fine θ′-Al2Cu phase (100~400 nm) is precipitated from matrix. influences quantity size precipitates; when 1:1, precipitation reaches highest smallest....

Digital twins have been actively explored in many engineering applications, such as manufacturing and autonomous systems. However, model discrepancy is ubiquitous most digital twin models has significant impacts on the performance of using those models. In recent years, data-driven modeling techniques demonstrated promising characterizing existing models, while training data for learning often obtained an empirical way active approach gathering informative can potentially benefit...

The effect of Yb on the microstructure and tensile properties at room temperature high (350 °C) as-cast T6 heat-treated Al-6Cu-0.4Mn alloys was investigated. results show that can refine α-Al primary grain + Al2Cu eutectic structure. structure alloy containing 0.3 wt.%Yb has best refining effect. After heat treatment, most network disappeared, many dispersed (200–400 nm) θ′-Al2Cu phases were precipitated in matrix. With addition Yb, amount increases, average size decreases from 260 nm base...

Background: This study aimed to compare the effects of Zoledronic Acid (ZA) versus Denosumab (DEN) on bone metabolism, inflammatory response, and immunoglobulins in breast cancer (BC) patients with metastases. Methods: The potential population consisted 163 metastases BC admitted from May 2023 June 2024. Through propensity score matching (PSM), 122 were included, 61 ZA group (treated ZA) DEN DEN). Levels tartrate-resistant acid phosphatase 5b (TRACP-5b), glutamyl protein (BGP), alkaline...

A novel compact microstrip ultra-wideband (UWB) bandpass filter (BPF) is proposed using a multiple-mode resonator (MMR), aiming at transmitting signals in the whole UWB passband. The resonant frequencies of this MMR design are properly adjusted equally within Then, two aperture-backed interdigital coupled-lines sides introduced for an effective enhancement capacitive coupling factor. Transmission zeros can be created lower and upper passband edges to improve selectivity greatly. Finally,...

A small ultrawideband (UWB) slot antenna is proposed using a stepped impedance resonator feeding line, aiming at improving band-edge selectivity. The mainly comprises line with low-pass characteristics the top of dielectric substrate and two slots bottom. used to improve upper selectivity, narrow near improves lower frequency selection range, selective characteristic, reflected zeros are analyzed studied. measured results show that covers range UWB systems from 3.1 11 GHz (114%) reflection...

The effects of the rare earth element La on microstructure and mechanical properties cast Al-5.4Cu-0.7Mg-0.6Ag alloys have been investigated through metallographic observation, scanning electron microscopy analysis, transmission microscopy, X-ray diffraction, tensile testing. present form action mechanism analyzed. findings indicate that inclusion trace amounts markedly diminishes grain size in Al-Cu-Mg-Ag alloy. Furthermore, as content increases, alloy's strength is significantly improved....

<title>Abstract</title> A space-based mass-conserving framework using observed carbon monoxide (CO) and formaldehyde (HCHO) columns quantifies day-to-day grid-to-grid CO emissions over energy-consuming Shanxi. Annualized total are 8 times higher than a priori datasets, especially low emission areas, resulting in an at least 7% increase CO₂ emissions. Significant forcings include atmospheric lifetime of (0.3–16.5 d) HCHO (0.1-6.5h), transport. Annual decreased year-by-year,...

Traditional Newmark models estimate earthquake-induced landslide hazards by calculating permanent displacements exceeding the critical acceleration, which is determined from static factors of safety and hillslope geometries. However, these studies typically predict potential mass only for source area, rather than entire zone, includes both sliding/depositional areas. In this study, we present a modified Runout model that incorporates sliding depositional areas to improve estimation chain...

In this letter, a miniaturized spoof surface plasmon polaritons (SSPPs) low-pass filter with novel transition structure is proposed. The designed by two rectangular strips an inclination of 17° and right-angled triangle patches. we analyzed the normal azimuthal components electric field perpendicular to plane at different locations, verifying effectiveness transitional structure. Besides, efficient conversion between quasi-transverse electromagnetic (TEM) waves transverse magnetic (TM)...

We have demonstrated the generation of multicolor noise-like pulse complex in a passively Yb-doped mode-locked fiber laser based on single mode-graded index multimode-single mode (SMF-GIMF-SMF) device as saturable absorber (SA). The stimulated Raman scattering (SRS) effect leads to cascaded main (NLP) at 1028.8 nm together with noise like (RP) 1076.1 nm. generated dual wavelength pulses demonstrate unique properties mutually synchronization and coherence. autocorrelation traces show that...

In this paper, a new detection method of pin defects based on image segmentation and ResNe-50 is proposed, which realizes the defect faulty pins in many aviation connectors. dataset used to segment connectors single generate dataset, reduces tedious work manually labeling dataset. model, ResNet-50, ResNet-B residual structure introduced reduce loss features during information extraction; continuously differentiable CELU as activation function neuron death problem ReLU; deformable convolution...

Abstract A compact reconfigurable filtering ultra-wideband (UWB) antenna with switchable band-notched functions is proposed. The basic structure of the proposed design a slot good band-edge selectivity using stepped impedance resonator feeding line. reconfigurability achieved by two microstrip lines paralleling to line and PIN diodes. bias circuit are relatively simple not connected radiation structure, so they have little negative influence on characteristics antenna. Total four states...