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作者： Chen, Cong Long, Zixuan Nan, Fang Xiao, Luyao Zhu, Dijie Li, Xiang Liu, Ying Shao, Shihai National Key Laboratory of Science and Technology on Communications University of Electronic Science and Technology of China Chengdu China Telecom Research Institute Beijing China Glasgow College University of Electronic Science and Technology of China Chengdu China Laboratory of Electromagnetic Space Cognition and Intelligent Control Beijing China

Almost blank subframe (ABS) is a classic and efficient technology to cancel interference in cellular networks and could be applied in future networks such as ultra-density network. However, the existence of ABS will result in the deterioration of the communication capacity of the macro base station (BS), particularly for applications with large number of edge users. To solve this problem, an improved ABS technology with an interference cancelation scheme is proposed. For the considered scenario, the macro BS and the micro BS work in a cooperative manner, where the signal transmitted by the macro BS interferes with the communication between the micro BS and its edge terminals. At the terminal side, both the nonlinearity of the macro BS transmitter and the propagation model between the edge user and the macro BS are estimated using neural networks (NNs), which are then sent to the micro BS for interference elimination through the ABS. At the micro BS side, firstly, the nonlinearity and channel parameters from the ABS frame are used to generate a cancelation signal. Secondly, the cancelation signal is sent from the micro BS to the edge user to eliminate the disturbance from the macro BS. This enhanced technology can alleviate the disturbance for the edge user. Meanwhile, since it massively decreases the occupancy of ABS in the macro BS, the capacity of the macro cell can be improved. © 2023 John Wiley & Sons Ltd.

关键词： Heterogeneous networks

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A Novel Structure in PUMA Array for Bandwidth Broadening and Profile Reduction 16

A Novel Structure in PUMA Array for Bandwidth Broadening and...

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16th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies, UCMMT 2023

作者： Yao, Chenyang Wang, Hao Cao, Jianyin Li, Xiang Qi, Liang Tian, Zhen Nanjing University of Science and Technology Nanjing China Nanhu Laboratory Jiaxing China Laboratory of Electromagnetic Space Cognition and Intelligent Control Beijing China

ISBN: (纸本)9798350339406

This paper proposed a new method of expanding the bandwidth of PUMA array. By attaching bottom-open vias below the coupling plate, lower operating frequency is available without increasing the profile. This design ultimately performs 8.1:1 bandwidth (2.59-21.0 GHz) at broadside, a scanning range of ±75° in the E-plane with 6.6:1 bandwidth (2.68-17.65 GHz), ±50° in the H-plane with 7.4:1 bandwidth (2.58-19.03 GHz) and ±60° in the D-plane with 7:1 bandwidth (2.6-18.2 GHz) at an overall profile of 0.054λL. © 2023 IEEE.

关键词： Bandwidth

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Research on lightweight detection algorithm of Infrared Image based on YOLOv5 4

Research on lightweight detection algorithm of Infrared Imag...

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4th International Conference on Advanced Algorithms and Signal Image Processing, AASIP 2024

作者： Zhang, Wenyi Mo, Hongwei Wu, Songling Li, Xiaomin Harbin Engineering University School of Intelligent Science and Engineering Harbin150000 China Beijing Aerospace Automatic Control Institute Beijing100854 China National Key Laboratory of Science and Technology on Aerospace Intelligence Control Beijing100854 China

ISBN: (数字)9781510682818

ISBN: (纸本)9781510682801

At present, infrared image can show good detection effect in complex environment because of its unique imaging characteristics, which brings a lot of convenience to people's production and life. However, because the infrared image contains a great lot of unnecessary information, it has great requirements for computing power and memory capacity, so it is challenging to satisfy the demands of real-time detection on resource-constrained portable mobile devices. To solve this problem, this paper proposes a refined lightweight algorithm built upon the YOLOv5, which changes the backbone network of the model to GhostNet network, introduces CA attention mechanism into the model to improve the detection effect of small targets, and changes the loss function of the model to Focal-EIoU loss function to improve the location effect of the boundary box and quicken the model's rate of convergence. Then replace the conventional convolution used in the sampling process of the model with the space-to-depth convolution module, in order to enhance the model's detection performance on low-resolution images and enable the extraction of more feature information. According to the experimental results, the enhanced detection algorithm is just 1% less than the initial YOLOv5 algorithm, and the model volume and floating point calculation are reduced by 31.9% and 36% respectively. This is better suited for deployments that are lightweight. © 2024 SPIE.

关键词： Convolution

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Design of wideband circularly polarized horn antenna for millimeter wave applications 15

Design of wideband circularly polarized horn antenna for mil...

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15th International Conference on Microwave and Millimeter Wave technology, ICMMT 2023

作者： Quan, Shuanglong Tian, Zhen Li, Xiang Qi, Liang Wang, Hao Nanjing University of Science and Technology Nanjing China Laboratory of Electromagnetic Space Cognition and Intelligent Control Beijing China Nanhu Laboratory Jiaxing China

ISBN: (纸本)9798350338874

In this paper, a millimeter-wave (mmW) wide band right-handed circularly polarized (RHCP) horn antenna is designed based on a polarizer with two 90 degree slots loaded on the inner wall of a circular waveguide. The antenna is fed by a standard rectangular waveguide WR-10 waveguide port, and the antenna excitation signal is converted from linear to circular polarization by a circular polarizer. The principle of the antenna is analyzed, the model is simulated and the parameters are optimized, and the design method for obtaining the left-handed circularly polarized (LHCP) antenna based on the RHCP antenna is given. The simulation results show that the reflectance of the antenna is not higher than -24.5 dB, the RHCP gain is greater than or equal to 13.0 dBi, and the axial ratio (AR) is not higher than 3 dB in the range of 84-110 GHz (26.8% relative bandwidth). The proposed antenna is broadband and circularly polarized, and can be widely used in broadband mmW applications. © 2023 IEEE.

关键词： Millimeter waves

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Design of millimeter wave wideband circularly polarized horn antenna based on rectangular waveguide polarizer 15

Design of millimeter wave wideband circularly polarized horn...

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15th International Conference on Microwave and Millimeter Wave technology, ICMMT 2023

ISBN: (纸本)9798350338874

In this paper, a millimeter wave (mmW) wide band right-handed circularly polarized (RHCP) horn antenna is designed with a polarizer in the form of a rectangular waveguide (RW). The antenna is fed by a standard RW WR-10 waveguide port. The designed polarizer can convert the antenna excitation signal from linearly polarized (LP) to circularly polarized (CP). The antenna is analyzed, modeled and simulated. The simulation results show that the S11 ≤-22.13dB, the axial ratio (AR) ≤3dB and the RHCP gain ≥15dBi in the range of 35.3% relative bandwidth (77GHz-110GHz). The proposed antenna is broadband and circularly polarized, and would be widely used in satellite communications and 5G mmW communications. © 2023 IEEE.

关键词： Millimeter waves

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Optimal Strategy for Aircraft Pursuit-evasion Games via Self-play Iteration

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Machine intelligence Research 2024年第3期21卷 585-596页

作者： Xin Wang Qing-Lai Wei Tao Li Jie Zhang State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of SciencesBeijing100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing100049China Institute of Systems Engineering Macao University of Science and TechnologyMacao999078China

In this paper,the pursuit-evasion game with state and control constraints is solved to achieve the Nash equilibrium of both the pursuer and the evader with an iterative self-play *** the condition where the Hamiltonian formed by means of Pontryagin’s maximum principle has the unique solution,it can be proven that the iterative control law converges to the Nash equilibrium ***,the strong nonlinearity of the ordinary differential equations formulated by Pontryagin’s maximum principle makes the control policy difficult to figured *** the system dynamics employed in this manuscript contains a high dimensional state vector with *** practical applications,such as the control of aircraft,the provided overload is ***,in this paper,we consider the optimal strategy of pursuit-evasion games with constant constraint on the control,while some state vectors are restricted by the function of the *** address the challenges,the optimal control problems are transformed into nonlinear programming problems through the direct collocation ***,two numerical cases of the aircraft pursuit-evasion scenario are given to demonstrate the effectiveness of the presented method to obtain the optimal control of both the pursuer and the evader.

关键词： Differential games pursuit-evasion games nonlinear control optimal control Nash equilibrium solution

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Low-Profile Tightly Coupled Dipole Array Loaded with Double-Layer Split Rings 16

Low-Profile Tightly Coupled Dipole Array Loaded with Double-...

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16th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies, UCMMT 2023

作者： He, Chao Wang, Hao Quan, Shuanglong Tian, Zhen Li, Xiang Qi, Liang Nanjing University of Science and Technology Nanjing China Nanhu Laboratory Jiaxing China Laboratory of Electromagnetic Space Cognition and Intelligent Control Beijing China

ISBN: (纸本)9798350339406

A novel split ring (SR) wide-angle impedance matching (WAIM) printed on a double-layer PCB was designed to replace the dielectric slabs WAIM or frequency selective surface (FSS) WAIM with high profile. The proposed WAIM is designed together with tightly coupled dipole array (TCDA). Consequently, TCDA loaded with the proposed double-layer SR achieves a impedance bandwidth of 8.5:1(2.12-18 GHz ) with active VSWR3.2 at broadside;while scanning up to {60°,75°}in E-plane, a bandwidth of {8.2:1 (2.17-17.91GHz) , 6.1:1(2.91-17.43GHz)} is achieved;while scanning up to 45°in H-plane, a bandwidth of 6.8:1(2.55-16.77GHz) is achieved. Compared to the FSS loaded TCDA with a 0.078λl profile, the double layer SR loaded TCDA can ensure wideband, wide-angle scanning capability with a lower profile of 0.058λl (λl is the free-space wavelength at the lowest frequency). © 2023 IEEE.

关键词： Frequency selective surfaces

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Content-decoupled Contrastive Learning-based Implicit Degradation Modeling for Blind Image Super-Resolution Supplementary Material

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IEEE Transactions on Image Processing 2025年 34卷 3013-3024页

作者： Yuan, Jiang Ma, Ji Wang, Bo Hu, Weiming North China Electric Power University School of Control and Computer Engineering Beijing102206 China CASIA State Key Laboratory of Multimodal Artificial Intelligence Systems Beijing100190 China University of Chinese Academy of Sciences School of Artificial Intelligence Beijing100049 China ShanghaiTech University School of Information Science and Technology Shanghai201210 China

Implicit degradation modeling-based blind super-resolution (SR) has attracted more increasing attention in the community due to its excellent generalization to complex degradation scenarios and wide application range. How to extract more discriminative degradation representations and fully adapt them to specific image features is the key to this task. In this paper, we propose a new Content-decoupled Contrastive Learning-based blind image super-resolution (CdCL) framework following the typical blind SR pipeline. This framework introduces negative-free contrastive learning technique for the first time to model the implicit degradation representation, in which a new cyclic shift sampling strategy is designed to ensure decoupling between content features and degradation features from the data perspective, thereby improving the purity and discriminability of the learned implicit degradation space. In addition, we propose a detail-aware implicit degradation adapting module that can better adapt degradation representations to specific LR features by enhancing the basic adaptation unit's perception of image details, significantly reducing the overall SR model complexity. Extensive experiments on synthetic and real data show that our method achieves highly competitive quantitative and qualitative results in various degradation settings while obviously reducing parameters and computational costs, validating the feasibility of designing practical and lightweight blind SR tools. Codes and models will be available at https://***/Fieldhunter/CdCL. © 1992-2012 IEEE.

关键词： Depression Anxiety disorders Face recognition Schizophrenia Visualization Training Data collection Uncertainty Facial features Emotion recognition

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Bi-objective Optimization with Partial Variable-length Coding Method for Mixed Fleet Vehicle Routing Problem 43

Bi-objective Optimization with Partial Variable-length Codin...

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43rd Chinese control Conference, CCC 2024

作者： Li, Shilong Du, Shengli Wu, Di Gao, Yongfeng Beijing University of Technology School of Artificial Intelligence and Automation Beijing100124 China Beijing Laboratory of Smart Environmental Protection Beijing100124 China Dalian University of Technology School of Control Science and Control Engineering Dalian116024 China

ISBN: (纸本)9789887581581

This paper is concerned with the routing problem of a mixed vehicle fleet composed by both electric and conventional vehicles. A bi-objective model with the aim of minimizing carbon emissions and maximising customer satisfaction is established. To further tackle the challenges posed by the distinct constraints of electric and conventional vehicles, a partial variable-length coding method is introduced to facilitate chromosome generation in the model. Then, a novel NSGA-II including the above designed coding method is proposed for solving the optimization problem. By comparing the experiments results of solving separate single-objective optimization and the two conflict optimization objectives simultaneously, it is verified that the proposed encoding approach and algorithm is effective. The results suggest that the bi-objective model is well-established, demonstrating the anticipated conflict between the two objectives. Additionally, the partial variable-length coding method is shown to be effective in achieving chromosome generation tasks. © 2024 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Vehicle routing

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Study on Disturbing Moment Compensation for the Satellite with Large-Scale Rotating Antennas 8th

Study on Disturbing Moment Compensation for the Satellite wi...

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8th International Conference on Signal and Information Processing, Network and Computers, ICSINC 2021

作者： Fan, Wei Zhang, Yin Zeng, Haibo Beijing Institute of Control Engineering Beijing100190 China Science and Technology on Space Intelligent Control Laboratory Beijing100190 China Institute of Telecommunication and Navigation Satellites China Academy of Space Technology Beijing100094 China

ISBN: (纸本)9789811933868

In this paper, a method of interference feedforward compensation is proposed for the disturbance of satellites with large rotating antenna such as relay satellites with Large-scale Rotating Antennas. This method utilizes the angular momentum exchange device in advance to pre-compensate In order to reduce the disturbance of the satellite by calculating the coupling angular momentum changes of the satellite caused by the antenna motion at different positions. The simulation results show that the method can effectively reduce the interference of satellite when antennas do large-scale rotating which can make the attitude of the satellite more stable and the directional fluctuation of the platform smaller, which is conducive to the normal work of other satellite loads. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Satellites

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