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Space/Air Covert Communications:Potentials,Scenarios,and Key Technologies

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China Communications 2024年第3期21卷 1-18页

作者： Mao Haobin Liu Yanming Zhu Lipeng Mao Tianqi Xiao zhenyu Zhang Rui han Zhu Xia Xianggen School of Electronic and Information Engineering Beihang UniversityBeijing 100191China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore School of Science and Engineering Shenzhen Research Institute of Big Datathe Chinese University of Hong KongShenzhenGuangdong 518172China Department of Electrical and Computer Engineering University of HoustonHoustonTX 77004USA Department of Computer Science and Engineering Kyung Hee UniversitySeoulSouth Korea446-701 Department of Electrical and Computer Engineering University of DelawareNewarkDE 19716USA

Space/air communications have been envisioned as an essential part of the next-generation mobile communication networks for providing highquality global connectivity. However, the inherent broadcasting nature of wireless propagation environment and the broad coverage pose severe threats to the protection of private data. Emerging covert communications provides a promising solution to achieve robust communication security. Aiming at facilitating the practical implementation of covert communications in space/air networks, we present a tutorial overview of its potentials, scenarios, and key technologies. Specifically, first, the commonly used covertness constraint model, covert performance metrics, and potential application scenarios are briefly introduced. Then, several efficient methods that introduce uncertainty into the covert system are thoroughly summarized, followed by several critical enabling technologies, including joint resource allocation and deployment/trajectory design, multi-antenna and beamforming techniques, reconfigurable intelligent surface(RIS), and artificial intelligence algorithms. Finally, we highlight some open issues for future investigation.

关键词： artificial intelligence(AI) sixth generation(6G) space-air-ground integrated networks(SAGINs) space/air covert communications

Application of FRS on Target Recognition

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Open Journal of Applied Sciences 2017年第10期7卷 503-510页

作者： Donghua Gu zhenyu han Qing’e Wu Engineering Training Center Zhengzhou University of Light Industry Zhengzhou China School of Electrical and Information Engineering Zhengzhou University of Light Industry Zhengzhou China

In order to let machine better imitate thinking method of people to perform recognition and classification for fuzzy and uncertain thing, this paper puts forward a fuzzy and rough association method to deal with the problem. However, the application of fuzzy rough sets (FRS) will be introduced mainly on pattern recognition. Some related theories on FRS would be discussed, and some fuzzy rough mathematical methods on pattern-recognition will be given. Then, concrete applications of FRS on image processing and recognition will be introduced. Simulation result signifies that this fuzzy and rough association method is not only fast but also closer to nature attribute of thing for processing and recognizing image by comparing with the single neural network and other recognition device. The recognition rate is about 95.78%.

关键词： FR Proximity Maximum Principle of Membership Principle of Proximity Target Recognition

Novel method for the recognition of Jinnan cattle action using bottleneck attention enhanced two-stream neural network

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International Journal of Agricultural and Biological Engineering 2024年第3期17卷 203-210页

作者： Wangli Hao Meng han Kai Zhang Li Zhang Wangbao Hao Fuzhong Li zhenyu Liu School of Software Shanxi Agricultural UniversityJinzhong 030801ShanxiChina Yuncheng National Jinnan Cattle Genetic Resources and Gene Protection Center Yongji 044500ShanxiChina Yongji Puzhou Old City Beimenwai Cattle Farm Yongji 044500ShanxiChina College of Engineering Shanxi Agricultural UniversityJinzhong 030801ShanxiChina

Effective and accurate action recognition is essential to the intelligent breeding of the Jinnan ***,there are still several challenges in the current Jinnan cattle action *** methods are based on manual characteristics and low recognition *** study is aimed at the efficient and accurate development of Jinnan cattle action recognition methods to overcome existing problems and support intelligent *** acquired data from the previous methods contain a lot of noise,which will cause individual cattle to have excessive behaviors due to *** the high labor costs,low efficiency,and low model accuracy of the above approaches,this study developed a bottleneck attention-enhanced two-stream(BATS)Jinnan cattle action recognition *** primarily comprises a Spatial Stream Subnetwork,a Temporal Stream Subnetwork,and a Bottleneck Attention *** can capture the spatial-channel dependencies in RGB and optical flow two branches respectively,so as to extract richer and more robust ***,the decision of the two branches can be fused to gain improved cattle action recognition *** with the traditional methods,the model proposed in this study has achieved state-of-the-art recognition performance,and the accuracy of motion recognition was 96.53%,which was 4.60%higher than other *** method significantly improves the efficiency and accuracy of behavior recognition and provides an important research foundation and direction for the development of higher-level behavior analysis models in the future development of smart animal husbandry.

关键词： Jinnan cattle action recognition bottleneck attention two-stream neural network

Application of Fuzzy Automata Decision-Making System in Target Control

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Journal of Computer and Communications 2017年第10期5卷 16-25页

作者： Qinggang Wu zhenyu han Qing E. Wu School of Computer and Communication Engineering Zhengzhou University of Light Industry Zhengzhou China Engineering Training Center Zhengzhou University of Light Industry Zhengzhou China College of Electric and Information Engineering Zhengzhou University of Light Industry Zhengzhou China

In order to perform better in target control, this paper proposed a decision-making system method based on fuzzy automata. The decision-making system first preprocessed the signal and then performed a two-level decision on the target to achieve optimal control. The system consisted of four parts: signal preprocessing, contrast decision-making, comprehensive judgment of decision-making and decision-making result. These decision algorithms in target control were given. A concrete application of this decision-making system in target control was described. Being compared with other existing methods, this paper used both global features and local features of target, and used the decision-making system of fuzzy automata for the target control. Simulation results showed that the control effect based on the decision-making system was better than that of the other existing methods. Not only it was faster, but also its correct control rate was higher to be 95.18% for the target control. This research on the control system not only developed the FA theory, but also strengthened its application scope in the field of control engineering.

关键词： Decision-Making System Comprehensive Judgment Fuzzy Automata Target Control

控冷工艺对不同Mo含量无碳化物贝氏体/马氏体钢组织与性能的影响

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金属热处理 2014年第3期39卷 60-64页

作者：韩振宇攀钢集团研究院有限公司钒钛资源综合利用国家重点实验室四川攀枝花617000

采用力学试验机、光学显微镜及透射电镜研究了轧后不同冷却工艺对不同Mo含量的无碳化物贝氏体马氏体复相钢组织与性能的影响。结果表明,空冷条件下,不同Mo含量钢均获得了包含贝氏体铁素体、少量先共析铁素体和微量马氏体的组织,随Mo含... 详细信息

采用力学试验机、光学显微镜及透射电镜研究了轧后不同冷却工艺对不同Mo含量的无碳化物贝氏体马氏体复相钢组织与性能的影响。结果表明,空冷条件下,不同Mo含量钢均获得了包含贝氏体铁素体、少量先共析铁素体和微量马氏体的组织,随Mo含量提高,强硬度及冲击性能显著提高,Mo在钢中抑制先共析铁素体析出、细化晶粒作用显著。对试验钢轧后施加2.5℃/s冷却,其组织为极细贝氏体铁素体片和交替分布的不连续残留奥氏体薄膜、细小M-A岛以及少量孪晶马氏体,且无论钢中Mo含量高低,均获得了更高的强硬度及适中的韧塑性,综合性能良好。

关键词：控冷工艺 Mo含量无碳化物贝氏体马氏体钢组织性能

Sturgeon Cartilage-Derived Chondroitin Sulfate Exhibited Anti-inflammatory Activity against DSS-induced Colitis via Modification of Gut Microbiota

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Food Science and Human Wellness 2024年

作者： Ruiyun Wu Zixin han zhenyu Wang Pinglan Li Nan Shang Institute of Food Science and Technology， Chinese Academy of Agricultural Sciences， Integrated Laboratory of Processing Technology for Chinese Meat and Dish Products， Ministry of Agriculture and Rural Affairs College of Food Science and Nutritional Engineering， China Agricultural University College of Engineering， China Agricultural University

Chondroitin sulfate (CS) is one of the main bioactive compounds in animal cartilage. In this study， the anti-inflammatory activity of sturgeon-derived chondroitin sulfate (SCS) was evaluated in the DSS-induced BALB/c mice model. Orally administration of SCS significantly alleviated the DSS-induced colitis symptoms， including the reduction of crypt depth， inhibition of the abnormal crypt foci formation， down-regulation of the proinflammatory biomarkers (NO， IL-6， IL-1β and TNF-α) and up-regulation of the anti-inflammatory biomarkers (IL-10 and IL-4). The gut microbiota analysis revealed that SCS alters the intestinal microbiota composition in colitis mice， especially the increase of the relative abundance of Ruminococcaceae and Lachnospiracea. This alternation further induced primary bile acids convert into secondary bile acids. With SCS administration， the levels of deoxycholic acid (DCA) and litho cholic acid (LCA) were increased by ～1.5 and ～2.5-fold， respectively. The stimulated secretion of DCA and LCA showed further activation of the NF-κB signaling pathway， thereby suppressing the inflammatory response and attenuating IBD in mice. This study provided a valuable strategy for colitis prevention and treatment with sturgeon cartilage by-products.

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论高友工“抒情美典”视域下的《文赋》

中国文学研究 2023年第2期 103-109页

作者：韩镇宇东南大学人文学院江苏南京211189

高友工在其所建构的“中国抒情美学传统”中将《文赋》视为中国文学理论走向“抒情”的一篇宣言,《文赋》标志着“抒情美典”框架的基本形成。一方面“,抒情美典”以保存创作主体的自我现时经验为目的,以“内化”和“象意”作为基本方法... 详细信息

高友工在其所建构的“中国抒情美学传统”中将《文赋》视为中国文学理论走向“抒情”的一篇宣言,《文赋》标志着“抒情美典”框架的基本形成。一方面“,抒情美典”以保存创作主体的自我现时经验为目的,以“内化”和“象意”作为基本方法,恰好对应《文赋》所面对的“意”何以“称物”、“文”又何以“逮意”这两个基础性的问题;另一方面,《文赋》作为一篇“抒情式的批评”,以创作过程为研究对象,通过“想象语言”深入创作主体的经验世界,也展露出陆机本人深沉的现实关怀和生命沉思。

关键词：高友工 “抒情美典” 《文赋》 “抒情式的批评” 抒情传统

Exosomes derived from microglia overexpressing miR-124-3p alleviate neuronal endoplasmic reticulum stress damage after repetitive mild traumatic brain injury

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Neural Regeneration Research 2024年第9期19卷 2010-2018页

作者： Yan Wang Dai Li Lan Zhang zhenyu Yin Zhaoli han Xintong Ge Meimei Li Jing Zhao Shishuang Zhang Yan Zuo Xiangyang Xiong han Gao Qiang Liu Fanglian Chen Ping Lei Department of Geriatrics Tianjin Medical University General HospitalTianjinChina Tianjin Geriatrics Institute Tianjin Medical University General HospitalTianjinChina Tianjin Neurological Institute Tianjin Medical University General HospitalTianjinChina

We previously reported that miR-124-3p is markedly upregulated in microglia-derived exosomes following repetitive mild traumatic brain ***,its impact on neuronal endoplasmic reticulum stress following repetitive mild traumatic brain injury remains *** this study,we first used an HT22 scratch injury model to mimic traumatic brain injury,then co-cultured the HT22 cells with BV2 microglia expressing high levels of *** found that exosomes containing high levels of miR-124-3p attenuated apoptosis and endoplasmic reticulum ***,luciferase reporter assay analysis confirmed that miR-124-3p bound specifically to the endoplasmic reticulum stress-related protein IRE1α,while an IRE1αfunctional salvage experiment confirmed that miR-124-3p targeted IRE1αand reduced its expression,thereby inhibiting endoplasmic reticulum stress in injured ***,we delivered microglia-derived exosomes containing miR-124-3p intranasally to a mouse model of repetitive mild traumatic brain injury and found that endoplasmic reticulum stress and apoptosis levels in hippocampal neurons were significantly *** findings suggest that,after repetitive mild traumatic brain injury,miR-124-3 can be transferred from microglia-derived exosomes to injured neurons,where it exerts a neuroprotective effect by inhibiting endoplasmic reticulum ***,microglia-derived exosomes containing miR-124-3p may represent a novel therapeutic strategy for repetitive mild traumatic brain injury.

关键词： apoptosis C/EBP homologous protein endoplasmic reticulum stress exosome inositol-requiring enzyme 1α microglia miR-124-3p neuron repetitive mild traumatic brain injury X-box binding protein 1

用SCRLH方法验证匹配MNG-ENG结构的隧穿特性

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哈尔滨工程大学学报 2011年第2期32卷 255-259,265页

作者：王政平韩振豫哈尔滨工程大学理学院黑龙江哈尔滨150001

提出了利用简化CRLHTL来构造了电单负(ENG)材料和磁单负(MNG)材料的方法,并利用该方法对由三单元电单负(ENG)材料和三单元磁单负(MNG)材料构成的对状结构的隧穿效应进行了仿真,利用其散射参数及相移验证了该结构的隧穿效应的存在及其产... 详细信息

提出了利用简化CRLHTL来构造了电单负(ENG)材料和磁单负(MNG)材料的方法,并利用该方法对由三单元电单负(ENG)材料和三单元磁单负(MNG)材料构成的对状结构的隧穿效应进行了仿真,利用其散射参数及相移验证了该结构的隧穿效应的存在及其产生条件.研究结果表明,这种新方法用于单负材料的电磁特性研究具有模型结构简单、等效电路电磁参数少、易于匹配和物理实现、利于集成等优点.

关键词：电单负传输线磁单负传输线隧穿现象简化的左右手复合传输线