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14th International Photonics and Optoelectronics Meetings, POEM 2022

作者： Wang, Yujiang Zhou, Xingping Shi, Yuechun Chen, Xiangfei Microwave-photonics Technology Laboratory Nanjing National Laboratory of Microstructures College of Engineering and Applied Sciences Nanjing University Nanjing210093 China Institute of Quantum Information and Technology Nanjing University of Posts and Telecommunications Nanjing210003 China Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Nanjing210003 China Yongjiang Lab Ningbo China

ISBN: (纸本)9781510664050

We propose a design of a bandpass-filter-integrated metalens for the gas sensing. A device with both filtering and focusing functions is designed, by integrating a one-dimensional photonic crystal and a metalens. It has a great filtering effect for one absorption peak (1650 nm) of the target gas (the methane). The transmission rate of the target wavelength is 89% and the relative intensity of the light field is up to 135. Our device has the function of focusing the light onto the photodetector (PD). The response of PD has been greatly improved. Meanwhile, the device can be fabricated into a photonic integrated chip. We provide a new scheme of the photonic integration chip for the multiple gas sensing. © 2023 SPIE.

关键词： Bandpass filters

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An Acne Detector for Skin Image Based On Attention Enhanced Feature Pyramid networks

An Acne Detector for Skin Image Based On Attention Enhanced ...

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Information technology,Big Data and Artificial Intelligence (ICIBA), International Conference on IEEE International Conference on

作者： Xiaolin Ma Jiaqi Lu Xinhua Liu Hailan Kuang Hubei Key Laboratory of Broadband Wireless Communication and Sensor Network Wuhan China School of Information Engineering Wuhan University of Technology Wuhan China

Automatic acne detection can help people more quickly detect acne disease. At present, most of the researches are based on two-stage detectors, and the researches based on single-stage detectors are very few. However, smaller and faster models are required in practical applications. In this paper, we build a faster and more accurate acne detection model based on YOLOX. First, we propose an Attention Enhanced Feature Pyramid network (AEFPN) to improve the efficiency and quality of feature fusion. It works by controlling the delivery of feature information and using attention. Then, we propose a stronger data augmentation strategy named MixAug, which uses Copy-Paste and Mixup by turning with a certain probability to make the model converging faster and the training curve smoother. In addition, to assign higher quality samples for small objects, we use Normalized Wasserstein Distance to improve the lab.l assignment strategy called Simplified Optimal Transport Assignment (SimOTA). Finally, we conducted a number of experiments on the AcneSCU dataset. The results demonstrate the proposed method could improve the performance of YOLOX in acne detection, allowing YOLOX to increase 2.62% average precision (AP). At the same time, it can effectively improve the convergence speed of the model. Our model is superior to the current research in model size, detection speed and accuracy.

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Ghost edge detection based on HED network

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Frontiers of Optoelectronics 2022年第3期15卷 25-33页

作者： Shengmei Zhao Yifang Cui Xing He Le Wang Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications(NUPT)Nanjing 210003China Key Lab of Broadband Wireless Communication and Sensor Network Technology(NUPT) Ministry of EducationNanjing 210003China

In this paper,we present an edge detection scheme based on ghost imaging(GI)with a holistically-nested neural *** so-called holistically-nested edge detection(HED)network is adopted to combine the fully convolutional neural network(CNN)with deep supervision to learn image edges *** data are used to train the HED network,and the unknown object’s edge information is reconstructed from the experimental *** experiment results show that,when the compression ratio(CR)is 12.5%,this scheme can obtain a high-quality edge information with a sub-Nyquist sampling ratio and has a better performance than those using speckle-shifting GI(SSGI),compressed ghost edge imaging(CGEI)and subpixel-shifted GI(SPSGI).Indeed,the proposed scheme can have a good signal-to-noise ratio performance even if the sub-Nyquist sampling ratio is greater than 5.45%.Since the HED network is trained by numerical simulations before the experiment,this proposed method provides a promising way for achieving edge detection with small measurement times and low time cost.

关键词： Edge detection Ghost imaging(GI) Holistically-nested neural network Compression ratio(CR) Signal-tonoise ratio(SNR)

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Cross-Modal Haptic Generation for Emergency Rescue in Internet of Robotic Things

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IEEE Internet of Things Journal 2025年

作者： Liu, Hengfa Wei, Xin Gao, Yun Zhou, Liang Qian, Yi Nanjing University of Posts and Telecommunications School of Communications and Information Engineering Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing210003 China University of Nebraska-Lincoln Department of Electrical and Computer Engineering OmahaNE68588 United States

Robots equipped with multi-modal sensing capabilities play an important role in the Internet of Robotic Things (IoRT), especially in emergency rescue. However, existing rescue robots pose challenges for human operators in achieving precise manipulation due to the absence of haptic signals. Additionally, limited and fluctuating bandwidth in emergency rescue renders current cross-modal haptic generation schemes ineffective. To overcome this dilemma, we propose a novel cross-modal haptic generation scheme that enhances scalab.lity across diverse network conditions by leveraging correlations among audio-visual-haptic modalities. Specifically, we first propose an edge-device collab.ration-based architecture that dynamically extracts semantics from audio-visual signals, tailored to the current network conditions, for haptic generation. This is achieved by predicting the network state at the edge and performing multi-modal encoding and fusion at the device. Next, we design a scalab.e cross-modal haptic generation scheme that implements the optimal generation strategy based on received audio-visual semantics of different granularities, ensuring real-time acquisition of coarse-grained or fine-grained haptic feedback. Finally, numerical experimental results conducted on a multi-modal dataset and a simulated emergency environment indicate that the proposed scheme reliably generates haptic signals in emergency rescue. © 2025 IEEE.

关键词： Robots

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Coverage Enhancement Strategy Based on Novel Perception and Co-Evolution for Multimedia sensor networks

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Chinese Journal of Electronics 2023年第1期22卷 135-140页

作者： Fu Xiao Jing Wang Lijuan Sun Ruchuan Wang Jian Guo College of Computer Nanjing University of Posts and Telecommunications Nanjing China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing China Provincial Key Laboratory for Computer Information Processing Technology Soochow University Suzhou China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing China

Coverage enhancement is one of the hot research topics in wireless multimedia sensor networks. A novel Coverage-enhancing algorithm based on three-dimensional Directional perception and co-evolution (DPCCA) is proposed in multimedia sensor networks on the basis of the model whose pitch angle and deviation angle can be adjusted. Based on the proposed elliptical cone sensing model, we can derive the coverage area of the node and calculate the optimal pitch angle according the information of monitoring area and the nodes, and then the deviation angle is optimized based on co-evolution algorithm, which eliminate the overlapped and blind sensing area effectively. A set of simulations demonstrate the effectiveness of our algorithm in coverage ratio.

关键词： wireless communication Industries Solid modeling wireless sensor networks Three-dimensional displays Medical services sensors

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Analysis of Satellite Interference Source Location Algorithm 7

Analysis of Satellite Interference Source Location Algorithm

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7th International Conference on Computer and communications, ICCC 2021

作者： Yan, Hui Zhao, Laiding Zhang, Gengxin Ruan, Cen 'Telecommunication and Network' National Engineering Research Center Nanjing University of Posts and Telecommunications Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing China

ISBN: (纸本)9781665409506

There are many methods and principles of satellite interference source location, but no matter which method is chosen, the positioning equation is nonlinear. Therefore, it is very important to solve the nonlinear equations accurately for the accuracy of the final positioning results. In this paper, an improved particle swarm optimization (PSO) algorithm is proposed. Based on the combination of PSO and grid search algorithm, the precision requirement is set in the iterative stop condition. When the calculation results meet the set precision, iteration can be stopped. Compared with the ordinary particle swarm optimization algorithm, the results can be obtained more quickly and accurately. © 2021 IEEE.

关键词： Satellites

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Proposal for atom traps with low power by surface plasmon polaritons on the short waveguide

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Physical Review A 2024年第1期110卷 013121-013121页

作者： Aiping Liu Zhanfei Kang Tong Wang Pengfei Zhang Xifeng Ren Chang-Ling Zou Qin Wang Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Ministry of Education State Key Laboratory of Quantum Optics and Quantum Optics Devices and Institute of Opto-Electronics Institute of Quantum Information and Technology Hefei National Laboratory CAS Key Laboratory of Quantum Information CAS Center for Excellence in Quantum Information and Quantum Physics

In this study, a viable platform for atom traps using a dielectric-loaded surface-plasmon-polariton waveguide is proposed. A trap depth of 0.239 mK can be achieved above a SiO2 waveguide on an Au-SiO2 substrate, with mode powers of 0.5mW for the blue-detuned TM0 mode, 0.1mW for the TM1 mode, and 0.55mW for the red-detuned TM0 mode. The trap center is about 180 nm above the waveguide surface, and the corresponding cooperativity parameter for coupling the Rb87 atom with a guided photon is about 0.137. By controlling the phase difference between counterpropagating red-detuned TM0 modes, atoms can be delivered along the waveguide by an optical conveyor belt. Compared to the dielectric waveguide without the enhancement of surface plasmon polaritons, our scheme has the advantage of forming a trap depth with low-power requirements and stronger atom-photon interactions, which makes it highly suitable for applications in photonic-atomic chips.

关键词： Atom & ion trapping & guiding Integrated optics Nanophotonics Near-field optics Optical lattices & traps Trapped atoms Dipole approximation Two-level models

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Measurement-device-independent quantum key distribution of multiple degrees of freedom of a single photon

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Frontiers of physics 2021年第1期16卷 131-141页

作者： Yu-Fei Yan Lan Zhou Wei Zhong Yu-Bo Sheng Institute of Quantum Information and Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China Schoool of Science Nanjing University of Posts and TelecommunicationsNanjing 210003China Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of EducationNanjing University of Posts and TelecommunicationsNanjing 210003China

Measurement-device-independent quantum key distribution(MDI-QKD)provides us a powerful approach to resist all attacks at detection *** the unconditional security,people also seek for high key generation rate,but MDI-QKD has relatively low key generation *** this paper,we provide an efficient approach to increase the key generation rate of MDI-QKD by adopting multiple degrees of freedom(DOFs)of single photons to generate *** with other high-dimension MDI-QKD protocols encoding in one DOF,our protocol is more flexible,for our protocol generating keys in independent subsystems and the detection failure or error in a DOF not affecting the information encoding in other *** on above features,our MDI-QKD protocol may have potential application in future quantum comniunication field.

关键词： measurement-device-independent quantum key distribution polarization longitudinal-momentum key generation Tate

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A Random Access Control Scheme for a NOMA-Enabled LoRa network 15th

A Random Access Control Scheme for a NOMA-Enabled LoRa Netwo...

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15th EAI International Conference on communications and networking, ChinaCom 2020

作者： Wu, Wei Wang, Wennai Yang, Jihai Wang, Bin Nanjing University of Posts and Telecommunications Nanjing China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing China

ISBN: (纸本)9783030677190

LoRa is one of the most prominent Low-Power Wide-Area network (LPWAN) technologies, to accommodate pervasive Internet-of-Things (IoT) connectivities. However, its service capacity and scalab.lity are limited due to the scarce channel resources and the Aloha-like random access mechanism specified by LoRaWAN. We propose a NOMA-enabled LoRa gateway, which permits multiple end-devices to transmit their data at the same time over a shared channel. The whole random access process are provided in detail, including collision resolution and transmission scheduling based on a Distributed Queuing (DQ) method. In addition to that, Spreading Factor (SF) allocation in the transmission scheduling phase is also considered and an optimal problem is formulated to achieve maximum data transmission rate. In order to solve the problem efficiently, an SF allocation algorithm is developed based on the matching theory. Numerical results show that our proposed scheme significantly enhances the sum achievable user rate when the number of users increases. © 2021, ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering.

关键词： Wide area networks

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Nanoparticle trapping by counter-surface plasmon polariton lens

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Chinese Optics Letters 2022年第2期20卷 177-181页

作者： Jingjing Hong Xingping Zhou Rui Zhuang Wei Peng Jiawei Liu Aiping Liu Qin Wang Institute of Quantum Information and Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Ministry of EducationNanjing University of Posts and TelecommunicationsNanjing 210003China

A counter-surface plasmon polariton lens(CSPPL) is proposed to perform stable nanoparticle trapping by providing up to120 k;T optical potential depth. The optical potential depth is related to the incident angle and phase difference of the light incident on two gratings of CSPPL. The depth of optical potential can be manipulated with negligible displacement by the incident angle less than 20°. Both the depth and the center position of the optical potential well can be manipulated by the incident phase difference. The study of stable and manipulatable optical potential on the CSPPL promotes the integration of optical tweezers.

关键词： optical tweezers surface plasmon polaritons optical potential interference

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