A5100370267- Antenna Design and Analysis
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Energy Harvesting in Wireless Networks
- Indoor and Outdoor Localization Technologies
- High-Temperature Coating Behaviors
- Fire dynamics and safety research
- Housing Market and Economics
- Advanced ceramic materials synthesis
- Advanced Wireless Communication Technologies
- Lightning and Electromagnetic Phenomena
- Landslides and related hazards
- Fire Detection and Safety Systems
- Millimeter-Wave Propagation and Modeling
- Speech and Audio Processing
- Cryospheric studies and observations
- Speech Recognition and Synthesis
- Nuclear materials and radiation effects
- Catalytic Processes in Materials Science
- RFID technology advancements
- Human Mobility and Location-Based Analysis
- Wireless Networks and Protocols
- Advanced Image Fusion Techniques
- Plant Diversity and Evolution
- Engineering Structural Analysis Methods
- Hand Gesture Recognition Systems
Tsinghua University
2024-2025
Tianjin University
2009-2025
Jinan University
2022-2024
Chinese Academy of Sciences
2024
Guilin University of Technology
2023-2024
Anhui University of Technology
2024
Kunming Institute of Zoology
2024
Northwest A&F University
2015-2024
Beihang University
2022-2024
Northwest University
2017-2024
Near-infrared fluorescence (NIRF) probes greatly facilitate in vivo imaging of various biologically important species. However, there are several significant limitations such as consuming washing steps, photobleaching, and low signal intensity. Herein, we synthesized fluorescent copper nanosheets templated with DNA scaffolds (DNS/CuNSs). We employ them Cy5.5 the resonance energy transfer (FRET) system, which have a larger Stokes shift (∼12-fold) than traditional NIRF dye Cy5.5. Based on...
Beamforming can improve the communication and sensing capabilities for a wide range of IoT applications. However, most existing devices cannot perform beamforming due to form factor, energy, cost constraints. This paper presents RFlens, reconfigurable metasurface that empowers low-profile with capabilities. The consists many unit-cells, each acting as phase shifter signals going through it. By encoding shifting values, RFlens manipulate electromagnetic waves "reshape" resteer beam pattern....
The complexity and volatility of real-world radio environments often hamper wireless networks from achieving optimal performance. Recently, intelligent metasurfaces have been explored to dynamically reshape the propagation environment. However, existing systems are limited standalone metasurfaces, only enabling one-time signal redirection/reshaping effects within their direct line-of-sight. They cannot effectively scale cover larger areas. In this paper, we propose RFMagus, which employs a...
This paper focuses on a fundamental question in Wi-Fi-based gesture recognition: "Can we use the knowledge learned from some users to perform recognition for others?". problem is also known as cross-target recognition. It arises many practical deployments of where it prohibitively expensive collect training data every single user. We present CrossGR, low-cost system. As departure existing approaches, CrossGR does not require prior (such who currently performing gesture) target Instead,...
The quality of a learning-based Wi-Fi sensing system is bounded by the quantity and training data.However, obtaining sufficient high-quality data across different domains difficult due to extensive user involvement.We present CARING, federated-learning-based framework support collaborative cross-domain sensing.A key challenge CARING allow effective exchange learning knowledge local models that are derived from heterogeneous sources with uneven distributions.We overcome this first extracting...
Phased array beamforming has been extensively explored as a physical layer primitive to improve the secrecy capacity of wireless communication links. However, existing solutions are incompatible with low-profile IoT devices due cost, power and form factor constraints. More importantly, they vulnerable eavesdroppers high-sensitivity receiver. This paper presents Protego, which offloads security protection metasurface comprised large number 1-bit programmable unit-cells (i.e., phase shifters)....
Target material identification is playing an important role in our everyday life. This paper introduces a device-free target system, implemented on ubiquitous and cheap commercial off-the-shelf (COTS) Wi-Fi devices. The intuition that different materials produce amounts of phase amplitude changes when appears the line-of-sight (LoS) radio frequency (RF) link. However, due to multipath hardware imperfection, measured channel state information (CSI) are very noisy. We thus present novel CSI...
We describe a novel image fusion method for remote sensing based on structured dictionary learning and joint sparse representation which improves both quality execution time. First, dictionaries are separately trained from the panchromatic (PAN) multispectral (MS) by double-sparsity model. Then, we use model to obtain innovation components of PAN that absent MS bands. Finally, fused is constructed injecting into low-resolution injection Experimental results show our has better performance...
The subway system as the most important transportation for daily urban commuting is a typical non-equilibrium complex system. Unlike systems composed of single type basic units, consists 2 types units with service relationship: passengers demander services and trains supplier services. main challenge operation arises from passenger stranding at stations, which arise spatiotemporal mismatch supply scale demand scale. There special phenomenon propagation (PPS) within stations in by forming...
Abstract. This article uses 43 Sentinel-1A image datasets covering Beijing to obtain time series surface deformation information in the study area from January 2022 October 2023. It analyzes causes of land subsidence by integrating precipitation and urban construction. The main research results are as follows: (1) Three distinct areas identified eastern part Chaoyang District (Subsidence Area A), northwestern Tongzhou B), Yanjiao Town Hebei Province which is adjacent Beijing. Subsidence...
With the growing popularity of smart speakers, numerous novel acoustic sensing applications have been proposed for low-frequency human speech and high-frequency inaudible sounds. Spatial information plays a crucial role in these applications, enabling various location-based services. However, typically commercial microphone arrays face limitations spatial perception sounds due to their sparse array geometries optimized speech. In this paper, we introduce MetaAng, system designed augment by...
After over a decade of intensive research, wireless sensing technology is nearing commercialization. However, the inherent openness medium exposes this to security flaws and vulnerabilities. In paper, we introduce RISiren reveal risk. pioneering end-to-end black-box attack system leveraging programmable metasurface with high level stealthiness. The key insight lies in its ability generate malicious multipath using metasurface, thereby disrupting channel metrics influenced by genuine human...