China Electronics Technology Group Corporation

Frequency Decoupling and Recalibration for Small Object Detection in Remote Sensing Images via Discrete Wavelet Transform

The rapid advancement of deep learning has significantly improved the performance of remote sensing object detection. However, detection performance for small objects remains unsatisfactory. In this paper, we identify frequency aliasing as a key challenge underlying small object...

Dynamic Access and Time–Frequency–Phase Synchronization for Multisatellite Carrier Coherent Superposition in LEO Satellite Systems

ABSTRACT Reliable low‐Earth‐orbit (LEO) direct‐to‐handheld transmission is constrained by the limited single‐satellite link budget, while rapid orbital motion continuously changes link signal‐to‐noise ratios (SNRs) and cooperative satellite availability, making it difficult for s...

Adversarial Attack via Latent Feature Attribution of Diffusion Models

Traditional adversarial attacks are constrained by \({l_p}\) norm limits, resulting in adversarial examples with high-frequency noise that compromise their imperceptibility. In contrast, attacks using diffusion models without \({l_p}\) norm constraints can generate visually more...

Synergistic effects of ionization and displacement damage in GaN HEMTs

The effect of ionization damage on displacement damage in AlGaN/GaN high electron mobility transistors (HEMTs) is investigated via sequential proton and electron irradiation experiments. Electrical degradation is characterized following 170-keV proton irradiation and subsequent 1...

Evolution of interference and damage in a front-illuminated CMOS photodetector under 1064 nm high-repetition-rate nanosecond pulsed laser irradiation

High-repetition-rate nanosecond pulsed lasers produce irradiation effects on CMOS photodetectors through the coupling between single-pulse transient photoelectric responses and multi-pulse thermal accumulation. The evolution from interference to damage under varying power and rep...

Process-window and morphology prediction in laser-induced forward transfer of high-viscosity silver paste

Laser-induced forward transfer (LIFT) is a promising non-contact technique for transferring high-viscosity silver paste onto silicon wafers for photovoltaic metallization. To predict the stable transfer window and line morphology, a semi-empirical process-window model was establi...

Phase Compensator Combined Feedback Control to Mitigate Dynamic Hysteresis in Piezoelectric Actuators

The inherent dynamic hysteresis nonlinearity of piezoelectric actuators severely degrades the control accuracy of micropositioning systems. This paper proposes a composite control method based on a phase compensator and polynomial correction. Unlike conventional approaches that r...

PDMS-based flexible packaging method via a 12-inch RDL-first process for conformal electronic applications

Purpose This study aims to realize large-scale and high-density manufacturing of conformal electronic devices by proposing a polydimethylsiloxane (PDMS)-based flexible packaging method via a 12-inch wafer-level redistribution-layer-first (RDL-first) process. Design/methodology/ap...

On-Chip Measurement Circuit for Single-Event Transient Sensitivity and Propagation in 130 nm Flash-Based FPGAs

This paper proposes an on-chip time-to-digital converter (TDC) named pulse delay and capture circuit (PDCC), dedicated to single-event transient (SET) pulse measurement for radiation characterization of flash-based FPGAs. To address the inherent trade-offs of mainstream vernier d...

A Ku/K-Band Phase-Locked Frequency Synthesizer with Hz-Level Step and Low Phase Noise Based on DDS and Comb-Spectrum Multiplication

Conventional phase-locked loop (PLL) frequency synthesizers face an inherent trade-off between achieving fine frequency stepping and maintaining low phase noise, which restricts the development of high-performance frequency synthesizers in high-frequency bands. To address this is...

Leaky-wave antenna design based on the Synergistic Hybrid Electric Eel Algorithm (SHEEA)

To tackle the strongly-coupled multi-objective optimization challenges in leaky-wave antenna (LWA) design, a Synergistic Hybrid Electric Eel Algorithm (SHEEA) is proposed. Built upon the Electric Eel Foraging Optimization (EEFO) framework, SHEEA integrates simulated annealing acc...

Community Environment, Parenting Practices, Social Support, and Children’s Quality of Life in Shanghai, China: A Multi-Scalar and Gendered Analysis

Abstract This study investigates the relationships between community environment, parenting practices, social support, and children’s quality of life in Shanghai. Grounded in a “4D” framework (Density, Design, Diversity, and Destination), we employed a multi-scalar geospatial app...

EFKG: An Efficient and Fine-Grained Access Control Encrypted Knowledge Graph

As knowledge graphs are increasingly applied in sensitive domains such as healthcare, ensuring data confidentiality and fine-grained access control over outsourced graph data has become critical. In this paper, we propose EFKG, an Efficient and Fine-grained Access Control Encrypt...

Evaluating noises of fast-simulated boson sampling with statistical benchmark methods

Abstract It is important to know noise levels of boson sampling in order to cautiously demonstrate the quantum computational advantage or realize certain tasks. Based on those statistical benchmark methods such as the correlators and clouds, which are initially proposed to discri...