A5100392540- Indoor and Outdoor Localization Technologies
- Microwave Imaging and Scattering Analysis
- Advanced MIMO Systems Optimization
- Underwater Vehicles and Communication Systems
- Advanced Wireless Network Optimization
- Cooperative Communication and Network Coding
- Mobile Ad Hoc Networks
- Opportunistic and Delay-Tolerant Networks
- GaN-based semiconductor devices and materials
- Speech and Audio Processing
- Superconducting and THz Device Technology
- Energy Efficient Wireless Sensor Networks
- Physics of Superconductivity and Magnetism
- Semiconductor materials and devices
- Sparse and Compressive Sensing Techniques
- Wireless Networks and Protocols
- Robotics and Sensor-Based Localization
- Satellite Communication Systems
- Geophysical Methods and Applications
- Wireless Communication Networks Research
- Network Traffic and Congestion Control
- Terahertz technology and applications
- Conducting polymers and applications
- Target Tracking and Data Fusion in Sensor Networks
- Semiconductor Quantum Structures and Devices
Beijing Institute of Technology
2015-2024
China Huadian Corporation (China)
2024
Southwest University of Science and Technology
2006-2024
Southwest Jiaotong University
2010-2024
University of Science and Technology Beijing
2023-2024
Research Institute of Wood Industry
2024
Chinese Academy of Forestry
2024
Huazhong University of Science and Technology
2018-2022
Chinese University of Hong Kong
2021-2022
Guilin University of Electronic Technology
2022
An efficient pilot assignment scheme based on graph coloring is proposed to mitigate the severe contamination effect in cell-free massive multiple-input multiple-output systems. By exploiting large-scale fading coefficients between access points (APs) and user equipments, we first utilize an AP selection algorithm construct interference graph. Then, optimal can be achieved by updating In addition, consider a fair policy for reuse improve system performance. Numerical results verify that,...
Device-free localization (DFL) based on received signal strength (RSS) measurements functions by measuring RSS variation due to the presence of target. The accuracy a certain method closely depends measurement model itself. Existing models have been found not accurate enough under circumstances as they cannot explain some phenomena observed in DFL practices. In light this, we propose new characterize variation, which invokes diffraction theory and regards target cylinder instead point mass....
A coronene-cored perylene diimide twisted tetramer was developed as an acceptor additive to increase the <italic>V</italic><sub>oc</sub> values of <bold>PM6</bold>:<bold>Y6</bold> blend-based OSCs.
Received-signal-strength-based (RSS-based) device-free localization (DFL) is a promising technique since it able to localize the person without attaching any electronic device. This technology requires measuring RSS of all links in network constituted by several radio frequency (RF) sensors. It an energy-intensive task, especially when RF sensors work traditional mode, which directly send raw measurements base station (BS). The mode unfavorable for power constrained because amount data...
Radio tomographic imaging (RTI) has emerged as a promising device-free localization technology for locating the targets with no devices attached. RTI deduces location information from reconstructed attenuation image characterizing target-induced spatial loss of radio frequency measurements in sensing area. In cluttered indoor environments, RF wireless links are corrupted by multipath effects and thus less robust to achieve high accuracy RTI. This paper proposes improve quality using...
Abstract Two new fused‐ring electron acceptor (FREA) isomers with nonlinear and linear molecular conformation, m ‐BAIDIC p ‐BAIDIC, are designed synthesized. Despite the similar light absorption range energy levels, two exhibit distinct reorganization energies packing motifs, which directly related to conformation. Compared acceptor, shows more ordered higher crystallinity. Furthermore, ‐BAIDIC‐based devices reduced nonradiative loss improved charge transport mobilities. It is beneficial...
With deep learning booming, related technologies have been applied in various fields. However, it remains an open question terms of how to perform well on anomaly detection images with diverse content and complexity. To address such problem, we propose ADGAN (Anomaly Detection Generative Adversarial Network), a scalable encoder-decoder-encoder architecture for image detection. Through extracting utilizing multi-scale features normal samples, obtain fine-grained reconstructed class. Combined...
In the field of medical imaging, microwave tomography (MWT) is based on scattering and absorption characteristics different tissues to microwaves can reconstruct electromagnetic property distribution biological non-invasively without ionizing radiation. However, due inherently nonlinear ill-posed MWT calculations, actual imaging prone overfitting or artifacts. To address this, this paper proposes a two-step iterative approach for rapid tomography. This method establishes corresponding...
Spectrally Efficient Frequency Division Multiplexing (SEFDM) systems provide enhanced spectrum utilization compared with Orthogonal (OFDM) by relaxing the orthogonality condition among sub-carriers. However, in SEFDM systems, loss of results inter-carrier-interference (ICI) thus reduces transmission reliability. To alleviate ICI and achieve better error performance, this paper proposes a novel scheme, called index modulation (SEFDM-IM). The modulation, which was originally proposed for OFDM...
In blue InGaN light-emitting diodes (LEDs), the intuitive approaches to suppress Auger recombination by reducing carrier density, e.g., increasing number of quantum wells (QWs) and thickening width wells, suffer from nonuniform distribution more severe spatial separation electron hole wave functions. To resolve this issue, LED structures with thick polarization-matched AlGaInN barriers are proposed theoretically. Furthermore, QWs is reduced for purpose mitigating additional compressive...
Radio tomgographic imaging (RTI) is a method of the attenuation caused by object's obstruction within area surrounded wireless sensor nodes. The image reconstruction RTI an ill-posed problem because pixels are more than RSS measurements. Therefore, conventional methods such as least square not applicable solutions amplify noise dividing small singular values. In this paper, we discuss three algorithms i.e. LBP, Tikhonov regularization and projected Landweber iteration to obtain results. LBP...
Device-free localization (DFL) localizes the target by employing variation of received signal strength (RSS) due to presence which wears no device. The existing fingerprint-based DFL (FDFL) method simply compares online RSS variations with radio map and does not care about how is caused. However, we have found that when some links are shadowed target, even in indoor environments, will experience large attenuation. Hence, this paper, propose leverage enhance performance FDFL method....
Direct growth of gallium nitride (GaN) thin films is performed using plasma-enhanced atomic layer deposition (PEALD) at 300 °C on a sapphire with graphene interlayer. The x-ray diffraction and spherical aberration corrected transmission microscope results confirm that the GaN are nearly single-crystalline. Additionally, interfacial properties nucleation behaviors deposited investigated in detail. Therefore, this study offers perspective PEALD high-quality nanoscale epilayers broadens choice...
Mobile edge computing (MEC) networks are one of the key technologies for ultra-reliability and low-latency communications. The resource allocation solution needs to be carefully designed guarantee efficiency MEC networks. Based on potential game theory, a is proposed reduce energy consumption improve in includes two parts: first part power control scheme based theory second linear programming. find set transmission powers base stations (BSs) that maximizes function maximize average...
We consider a transmission scheme of Rate Splitting Multiple access systems over power line communication channel in this paper. The System model consists transmitter and K users, superimposing signals for users at the transmitter. Our aim is to maximize worst rate between system by jointly optimizing precoder vector allocation with method successive convex approximation(SCA). simulation results manifest that compared PLC-NOMA, PLC-RSMA adapts various directions (regardless whether are...
We make some modifications in this paper to the DAP-NAD-CJ (deterministic adaptable priority net access delay with cycle jump) algorithm for multicast applications. The new assigns wireless channel slot unevenly between stations network so that source can as fast possible. then proved by calculations and simulations modified outperforms greatly both single multi-priority networks.
In this paper, to improve the accuracy of detection and segmentation, we modify U-Net architecture address ischemic stroke segmentation detection, from ISLES 2018 dataset. dataset, CT images (in five modalities) corresponding ground truth created by combining manual annotations are provided. We use shortcut connections in architecture, which performs as a residual block. meantime, reduce overfitting caused scarcity training data, elementwise-sum concatenation network. also dice coefficient...
Monolithic stacked InGaN light-emitting diode (LED) connected by a polarization-enhanced GaN/AlN-based tunnel junction is demonstrated experimentally in this study. The typical LEDs exhibit 80% enhancement output power compared with conventional single because of the repeated use electrons and holes for photon generation. operation voltage higher than twice LEDs. This high can be attributed to non-optimal tunneling In addition analyses experimental results, theoretical analysis different...