In this communication, a dual-band aperture-shared antenna array (ASAA) is developed for base station. This ASAA contains 4 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\times $ </tex-math></inline-formula> high-band (HB) array, which operates from 3.4 to 3.8 GHz, and low-band (LB) antenna, 0.69 0.96 GHz. For decreasing pattern distortion of HB due the induced current in LB element, method following two...

Quantum squeezing-assisted noise suppression is a promising field with wide applications. However, the limit of induced by squeezing still unknown. This paper discusses this issue studying weak signal detection in an optomechanical system. By solving system dynamics frequency domain, we analyze output spectrum optical signal. The results show that intensity depends on many factors, including degree or direction and choice scheme. To measure effectiveness to obtain optimal value for given set...

This letter presents a filtering and electromagnetic-transparent (F/ET) antenna with characteristics at low-band (LB) high-band (HB) for the triple-band aperture-shared base-station antenna-array (TABA) application. The F/ET consists of dual-polarization main radiator an parasitic cross loop (PCL) to reduce obstructed influence HB waves. By loading PCL, generates radiation null LB, realizing characteristic. Additionally, coaxial line (ETCL) is proposed suppress HB-induced current on...

Avionics equipment is composed of multiple layers and complex structure, so it difficult to research progress based on fault mechanism, the amount effective data model insufficient, for general diagnosis algorithm train data. In order realize avionics equipment, machine learning applied equipment. Research samples are selected from ground operation simulation data, an combination feature selection extended isolation forest proposed detect categorize typical faults electronic modules. It can...

A full-quantum approach is used to study the quantum nonlinear properties of a compound Michelson-Sagnac interferometer optomechanical system. By deriving effective Hamiltonian, we find that reduced system exhibits Kerr term with complex coefficient, entirely induced by dissipative and dispersive couplings. Unexpectedly, nonlinearities resulting from coupling possess non-Hermitian Hamiltonian-like preserving nature beyond traditional dissipation. This protective mechanism allows exhibit...

Taking the Yishui County, Shandong Province as research area, we processed GF-2 images from different periods in May 2018 and 2020. Based on their spectral texture differences, combined with topographic geomorphic features, multiple hidden geological hazard points are identified. Finally, conducted on-site investigations ultimately identified potential hazards.

The rapid progress in artificial intelligence-generated content (AIGC), especially with diffusion models, has significantly advanced development of high-quality video generation. However, current models exhibit demanding computational requirements and high peak memory usage, for generating longer higher-resolution videos. These limitations greatly hinder the practical application on standard hardware platforms. To tackle this issue, we present a novel, training-free framework named...

With the development of big data, artificial intelligence and other technologies, data-driven aviation equipment fault diagnosis prediction technology has gradually become a research hotspot in field. Many typical intelligent algorithm models have been applied to this However, limited by airborne embedded computing environment, there are still some problems deployment represented deep neural networks on aircraft. This paper summarizes analyzes application such as convolutional field aircraft...

For the general no-reparable phase-mission system, working time of each phase is usually different. In this paper, system discretized to a fixed value, and reliability probability obtained by using discrete-time Bayesian network. The network model constructed respectively. directed edges are used deal with dependence problems, obtained. evaluate feasibility method verified comparing universal generating function(UGF) Monte Carlo(MC) method.

Taking the Shandong area as study area, we use SBAS-InSAR to process 647 views Sentinel-1A data in between 2018.7 and 2020.4 and, according deformation amount trend, reveal hidden geological disaster points extract surface field. In this paper, areas with obvious ground Feicheng were selected. We combined field survey results, finally verified combination of high-resolution imagery DEM has a certain effect interpretation points.

A full-quantum approach is used to study quantum nonlinear properties of a compound Michelson-Sagnac interferometer optomechanical system. The effective Hamiltonian shows that both dissipative and dispersive couplings possess imaginary- real-Kerr nonlinearities. And unexpectedly, the nonlinearities caused by coupling have non-Hermitian Hamiltonian-like properties. It can protect nature beyond traditional dissipation This protection mechanism allows system exhibit strong effects in parameter...

This letter introduces an effective self-interference cancellation (SIC) for improving isolation between transmit (Tx) ports and receive (Rx) of in-band full-duplex antenna with feeding networks (FNs). A significant improvement is realized by replacing the traditional FNs SICFNs. The coupling Tx Rx canceled in due to specific power ratios phase difference. Though a Python optimization procedure, optimal values key parameters SIC can be determined. To validate proposed technique, prototype...

Objects in close range formation flight need to be identified before being tracked by radar and other non-cooperation tracking equipments. As the distance between concomitant satellite main is very flight, schedule entering into sight of observation station uncertain, two objects cannot distinguished use orbit parameters schedules station. After analyzing physical moving characteristics them, we propose an identification method mean RCS attitude stability determination. The results show that...

The fault diagnosis of complex system is great significance. In view the current problems such as little data newly researched equipment. Taking engine drive pump, core component in hydraulic system, for example, a digital model conditions established and generated through batch simulation, multiple types classifiers leakage, blockage rotating shaft wear are developed by extracting state index pump output flow, so to detect different faults. test results show that classifier obtained...

Aero-engine maintenance mode was transferred from the prescheduled to condition-based maintenance. The can help improve engine reliability and reduce costs. study of condition monitoring system key step According characteristics aero-engine high speed signal, this paper designs system. Firstly, foreign experience learned. structure, functional requirements selection events were proposed for a system, then principle prototype its simulation platform airborne implemented, which helpful study.

In this work we demonstrate real-time portrait stylization, specifically, translating self-portrait into cartoon or anime style on mobile devices. We propose a latency-driven differentiable architecture search method, maintaining realistic generative quality. With our framework, obtain $10\times$ computation reduction the model and achieve video stylization off-the-shelf smartphone using GPUs.