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2021 China Automation Congress, CAC 2021

作者： Gong, Hua Cui, Mengya Zhang, Yong Sun, Wenjuan School of Science Shenyang Ligong University Shenyang110159 China School of Automation and Electrical Engineering Shenyang Ligong University Shenyang110159 China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin300308 China

ISBN: (纸本)9781665426473

The key problem of ground-to-air defense is how to make accurate and effective firepower assignment decision for attacking targets. A multi-objective optimization model of ground-to-air defense firepower assignment is established with the aim of maximizing the damage probability and minimizing the weapon consumption, and non-cooperative game theory is used to solve the problem. A non-cooperative game model is established by mapping the two objectives to players, and weapon assignment schemes to strategy profiles. An improved tabu genetic algorithm based on Nash equilibrium is designed to get the assignment scheme. Experimental results show that the proposed method has better convergence and stability than the improved genetic algorithm based on tabu search for multi-objective optimization model. © 2021 IEEE

关键词： Genetic algorithms

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A Dual-Band Rotational Feed Circularly Polarized RFID Reader Antenna Array with Stable Gain

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IEEE Antennas and Wireless Propagation Letters 2025年

作者： Wei, Kun Liu, Jie Xu, Rui Hu, Wei Chen, Chunhong Jiang, Wen Gao, Steven Xidian University National Key Laboratory of Radar Detection and Sensing Xi'an710071 China Science and Technology on Electromechanical Dynamics Control Laboratory Xi'an China School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing China Chinese University of Hong Kong Department of Electronic Engineering Hong Kong Hong Kong

In this letter, a dual-band rotational feed circularly polarized (CP) antenna array is proposed. The dual-band antenna element consists of two pairs of symmetric dipoles. The low-frequency CP radiation is achieved by the longer dipole pair, and the high-frequency radiation is mainly superimposed by the shorter dipole pair of the fundamental mode and the longer dipole pair of the higher-order mode. A compact and low-profile antenna array with a 1-to-4 rotational feeding network is introduced. The measured |S11| © 2002-2011 IEEE.

关键词： Circular polarization

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Grain size control in quasi-two-dimensional perovskite thin film via intermediate phase engineering for efficient bound exciton generation

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science China Materials 2024年第12期67卷 3925-3931页

作者： Guohui Li Wenhui Zhao Kai Lin Kefan Zhao Yujing Wang Aohua Niu Rong Weng Kaibo Zheng Yanxia Cui College of Electronic Information and Optical Engineering Key Laboratory of Interface Science and Engineering in Advanced MaterialsKey Lab of Advanced Transducers and Intelligent Control System of Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China Chemical Physics Division and NanoLund Lund UniversityBox 12422100LundSweden

Quasi-two dimensional(2D)perovskites have emerged as a promising class of materials due to their remarkable photoluminescence efficiency,which stems from their exceptionally high exciton binding *** spatial confinement of excitons within smaller grain sizes could enhance the formation of biexcitons leading to higher radiative recombination ***,the synthesis of high-quality quasi-2D perovskite thin films with controllable grain sizes remains a challenging *** this study,we present a facile method for achieving quasi-2D perovskite thin films with controllable grain sizes ranging from 500 to 900 *** is accomplished by intermediate phase engineering during the film fabrication *** results demonstrate that quasi-2D perovskite films with smaller grain sizes exhibit more efficient bound exciton generation and a reduced stimulated emission threshold down to 15.89µJ cm^(−2).Furthermore,femtosecond transient absorption measurements reveal that the decay time of bound excitons is shorter in quasi-2D perovskites with smaller grain sizes compared to that of those with larger grains at the same pump density,which is 230.5 *** observation suggests a more efficient exciton recombination process in the smaller grain size *** findings would offer a promising approach for the development of efficient bound exciton lasers.

关键词： quasi-2D perovskite intermediate phase engineering bound exciton generation grain size control

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Design an Efficient DNN Inference Framework with PS-PL Synergies in FPGA for Edge Computing

Design an Efficient DNN Inference Framework with PS-PL Syner...

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Chinese Automation Congress (CAC)

作者： Wancheng Liu Yuhai Li Yining Yang Jinyu Zhu Longjun Liu Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin China Institute of Artificial Intelligence and Robotics (IAIR) Xi’an Jiaotong University Xi’an China

in recent years, Deep Neural Network (DNN) based methods have achieved great success for changing inflexible machine to intelligent and live system. Internet of Things (IoT) applications equipped with DNN in domains such as self-driving, speech processing and video surveillance particular challenges. Since DNNs are memory-/computing- intensive applications, FPGAs are customized to accelerate DNN on edge system due to their low latency and high energy efficiency. However, embedded CPU is usually essential for IoT system and single accelerator of FPGA is hard to gain maximized performance of the whole IoT system. Therefore, we design an efficient DNN inference framework with programming system (PS, e.g., ARM CPU) and programming logic (PL, e.g. FPGA) synergies for intelligent IoT system. Compared with the common IoT system only separately leverages FPGA for DNN accelerating and ARM for other tasks, our framework can make ARM and FPGA jointly accelerate DNN inference from the beginning. Our PS-PL co-design approach can take full advantage of the merits of ARM (control operations) and FPGA (parallel computing operations) for various DNN model accelerating. We implemented our co-design framework on Zynq SoCs. The experimental results show that our framework can achieve maximal 205.9 GOPs/s DNN inference accelerating under 6.2W while it would not affect other CPU tasks running on IoT system.

关键词： Program processors Computational modeling Neural networks Programming Parallel processing Video surveillance Internet of Things

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Design Compact YOLO based Network for Small Target Detection on Infrared Image

Design Compact YOLO based Network for Small Target Detection...

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Chinese Automation Congress (CAC)

作者： Shuang Liu Zhicheng Liu Yuhai Li Wancheng Liu Chenyang Ge Longjun Liu Institute of Artificial Intelligence and Robotics (IAIR) Xi’an Jiaotong University Xi’an China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin China

most YOLO object detection neural networks prefer to focus on traditional RGB image, but previous studies rarely consider special YOLO network with compact architecture for infrared image. In this paper, we analyze original YOLO network architecture, and we propose a compact YOLO based network by using different blocks from previous work for small target detection on infrared image. We use small target detection layer, GhostConv convolution, Focus structure, Focal EIOU Loss and soft NMS modules to improve original YOLO network structure, which improves the accuracy and speed of target detection for infrared image. The experimental results show that the accuracy of target detection of original model can be effectively improved by adding the small target detection layer, the Focus structure and the BI-FPN structure. By replacing the GhostConv convolution, the calculation speed is significantly improved. At last, after the model is quantized and deployed with NCNN framework, the object detection speed can reached to 35ms per infrared image.

关键词： Automation Convolution Neural networks Object detection Network architecture

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Weapon Target Assignment for Surface-to-air Defense with an Improved Reinforcement Genetic Algorithm

Weapon Target Assignment for Surface-to-air Defense with an ...

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2021 China Automation Congress, CAC 2021

作者： Gong, Hua Liu, Dalong Zhang, Yong Xu, Ke School of Science Shenyang Ligong University Shenyang110159 China School of Automation and Electrical Engineering Shenyang Ligong University Shenyang110159 China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin300308 China

ISBN: (纸本)9781665426473

Decision optimization in surface-to-air defense and coordinated weapon target assignment can improve the defense effect and the utilization rate of weapons. Considering the constraints of weapon capability, a multi-target optimization model is established to maximize the damage probability and minimize the weapon consumption cost. A dual population genetic algorithm improved by reinforcement learning is designed to solve this model. The chromosome exchange ratio is controlled by reinforcement learning to ensure population diversity. Experimental results verify the convergence speed and accuracy of the improved reinforcement genetic algorithm. © 2021 IEEE

关键词： Genetic algorithms

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Current-Induced Magnetic Switching in an L1_(0) FePt Single Layer with Large Perpendicular Anisotropy Through Spin–Orbit Torque

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Engineering 2022年第5期8卷 55-61页

作者： Kaifeng Dong Chao Sun Laizhe Zhu Yiyi Jiao Ying Tao Xin Hu Ruofan Li Shuai Zhang Zhe Guo Shijiang Luo Xiaofei Yang Shaoping Li Long You School of Automation China University of GeosciencesWuhan 430074China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems China University of GeosciencesWuhan 430074China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China China Resources Microelectronics Limited Shanghai 200072China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518000China Wuhan National High Magnetic Field Center Huazhong University of Science and TechnologyWuhan 430074China

In this study,current-induced partial magnetization-based switching was realized through the spin–orbit torque(SOT)in single-layer L1_(0) FePt with a perpendicular anisotropy(K_(u⊥))of 1.19×10^(7) erg·cm^(-3)(1 erg·cm^(-3)=0.1 J·m^(-3)),and its corresponding SOT efficiency(βDL)was 8×10^(-6) Oe·(A·cm^(-2))^(-1)(1 Oe=79.57747 A·m^(-1)),which is several times higher than that of the traditional Ta/CoFeB/MgO structure reported in past *** SOT in the FePt films originated from the structural inversion asymmetry in the FePt films since the dislocations and defects were inhomogeneously distributed within the ***,the FePt grown on MgO with a granular structure had a larger effective SOT field and effi-ciency than that grown on SrTiO_(3)(STO)with a continuous *** SOT efficiency was found to be considerably dependent on not only the sputtering temperature-induced chemical ordering but also the lattice mismatch-induced evolution of the *** findings can provide a useful means of efficiently electrically controlling a magnetic bit that is highly thermally stable via SOT.

关键词： L1_(0)FePt SOT Inversion asymmetry Magnetic switching Perpendicular anisotropy

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Improved Unscented Kalman Filtering Algorithm Applied to On-vehicle Tracking System

Improved Unscented Kalman Filtering Algorithm Applied to On-...

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Computer, Internet of Things and control Engineering (CITCE), International Conference on

作者： Yun Chen Yi Liu Science and Technology on Electro-optic Control Laboratory Luoyang Institute of Electro-optical Equipment of AVIC Luoyang China

ISBN: (纸本)9781665421850

In this paper, we study the problem of tracking aerial targets in a modified spherical coordinate system using an on-vehicle tracking system using infrared sensors. In this challenging scenario, to solve the problems of poor calculation stability and large amount of calculation of the traditional unscented kalman filter algorithm, this article introduces and adopts an improved unscented kalman filter algorithm. In Sigma sampling, the error variance matrix uses singular value decomposition (SVD) to select the simplex with the smallest skewness. Compared with the estimation algorithm based on the standard unscented kalman filter, the new algorithm effectively reduces the state estimation error and improves the tracking stability and tracking accuracy.

关键词： Target tracking Monte Carlo methods Computational modeling Stability analysis Kalman filters Matrix decomposition Internet of Things

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Fabrication of lithium niobate metasurfaces via a combination of FIB and ICP-RIE

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Chinese Optics Letters 2022年第11期20卷 95-99页

作者： Chunyan Jin Wei Wu Lei Cao Bofeng Gao Jiaxin Chen Wei Cai Mengxin Ren Jingjun Xu Key Laboratory of Weak-Light Nonlinear Photonics Ministry of EducationSchool of Physics and TEDA Applied Physics InstituteNankai UniversityTianjin 300071China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin 300308China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Lithium niobate(LN)metasurfaces have emerged as a new platform for manipulating electromagnetic ***,we report a fabrication technique for LN nano-grating metasurfaces by combining focused ion beam(FIB)milling with inductively coupled plasma reactive ion etching(ICP-RIE).Steep sidewalls with angles larger than 80°are *** quasi-bound states in the continuum are observed from our *** measured transmission spectra show good agreement with the numerical simulations,confirming the high quality of the fabricated *** technique can be applied to fabricate the LN metasurfaces with sharp resonances for various applications in optical communications,on-chip photonics,laser physics,sensing,and so on.

关键词： lithium niobate metasurfaces fabrication FIB ICP-RIE

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Design of Energy Selective Surface with Ultra-Wideband Protection

Design of Energy Selective Surface with Ultra-Wideband Prote...

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International Applied Computational electromagnetics Society Symposium (ACES)

作者： Li Wang Chunyu Li Tiancheng Zhang Huaguang Bao Yinghui Zhou Sun Zheng Dazhi Ding Nanjing University of Science and Technology Nanjing China National Key Laboratory on Electromagnetic Environmental Effects and Electro-optical Engineering Army Engineering University Nanjing China

In this paper, an ultra-wideband energy selective surface (ESS) is proposed and simulated to protect electronic devices from high power microwaves (HPM). The ESS consists of two bandpass metasurfaces cascaded with an active metasurface. The performance of this structure has been studied using equivalent circuit models and full-wave simulations. The results show that the operating center frequency at 5 GHz with insertion loss of 0.4 dB, the insertion loss (IL) is less than 1 dB in the range from 4.77 GHz to 5.78 GHz, during the range from 1 GHz to 9 GHz, the shielding efficiency (SE) of HPM exceed 20 dB, and the relative bandwidth reaches 160%. At the same time, the structure has a certain degree of polarization insensitivity and superior angular stability.

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