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Articles by Dejiang Lu
Dual-doped all-graphene fiber for flexible, high-performance thermoelectric temperature sensing
Abstract High-performance temperature sensors are critical components for emerging Internet-of-Things and biomedical-electronics platforms. However, simultaneously achieving high sensitivity, mechanical compliance, and user-defined integrability remains a formidable materials-and-device challenge. Here, we report a continuous graphene fiber (GF) thermocouple technology where multiple p–n thermocouples are created in situ along a single, unbroken fiber while preserving its structural integrity.
Tesla-scale magnetic field measurement based on Sideband-overlap Zeeman spectroscopy using a functionalized MEMS vapor cell
Abstract Accurate measurement of strong magnetic fields in the Tesla range remains a persistent challenge due to calibration drift, nonlinearity, and spatial gradient sensitivity. Here, we present a compact magnetometry approach based on sideband-overlap Zeeman spectroscopy, enabled by a functionalized MEMS cesium vapor cell. The vapor cell features a dual-chamber glass–Si–glass structure with integrated microheaters on the optical window.
Development of a novel radially-distributed spiral bilayer thermopile infrared sensor with enhanced responsivity
Abstract Current trend of pursuing higher resolution in uncooled cost-effective infrared imagers demands thermopile sensing units with higher responsivity. Conventional designs often have limitations such as non-uniform temperature distribution among individual thermocouple legs or complex fabrication process, which limit further responsivity improvement. Here, a novel thermopile featuring a radially-distributed spiral structure with bilayer P-poly/Al thermocouples is proposed.
Theoretical modelling and optimization design of PMUT arrays for enhanced acoustic performance
Abstract Theoretical models are essential for performance analysis and structure optimization design of large-scale piezoelectric micromachined ultrasonic transducers (PMUT) arrays. However, current models have rarely incorporated the inter-element crosstalk and oversimplified the electro-mechanical-acoustic coupling, leading serious discrepancies with experimental results and limiting the array optimization design and performance improvement.
Piezoelectric stepped-plate resonators vibrating at lateral modes for direct viscosity determination in liquids
Abstract Precise viscosity measurement in liquid media remains a critical challenge for micromachined resonant sensors. This primarily results from the inherent coupling between viscosity and density in hydrodynamic interactions, which limits independent quantification of viscosity. This work presents an aluminum nitride (AlN) piezoelectric microresonator vibrating at in-plane lateral mode for direct viscosity sensing in liquids.
An Adaptive Parameter Evolutionary Marine Predators Algorithm for Joint Resource Scheduling of Cooperative Jamming Networked Radar Systems
1. Introduction With the continuous development of data fusion and artificial intelligence (AI) technology, electronic warfare is beginning to take on a new form of system-to-system confrontation, which is prompting both sides in the radar confrontation to find new strategies for competition.
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