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IRS辅助的移动VLC系统安全速率优化

无线电工程 2024年第9期54卷 2202-2210页

作者：赵文波赵响赵玉青黄菊桂林电子科技大学认知无线电与信息处理重点实验室广西桂林541004 南宁桂电电子科技研究院有限公司现代智能通信与信息处理中心工作室广西南宁530031

为了解决夜间城市安全和灾难恢复等场景中的照明和通信安全问题,研究了移动可见光通信(Visible Light Communication,VLC)系统的物理层安全(Physical Layer Security,PLS),移动VLC将发光二极管(Light Emitting Diode,LED)嵌入无人机(Unmanned Aerial Vehicle,UAV)同时实现照明和通信,且应需灵活配置;由于UAV移动,通信视距链路并不能一直存在,因此在移动VLC系统中引入智能反射面(Intelligent Reflective Surface,IRS)技术,实时重构光无线传输链路以进一步提升系统的安全性能。IRS辅助的移动VLC系统PLS,通过联合优化UAV位置、IRS分配矩阵和系统发射功率来最大化移动VLC系统的安全速率。由于形成的优化问题是一个非线性的混合整数非凸问题,提出一种低复杂度的迭代算法,将原始优化问题去耦合分解为3个子问题,并利用引入松弛变量、一阶泰勒展开和连续凸逼近等方法对子问题进行求解。数值结果表明,所提方案相比于几种基准方案更能提升系统的安全速率。

关键词：智能反射面移动可见光通信物理层安全无人机

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基于“象-形神-气”从脏腑气机辨治儿童抽动障碍

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中医杂志 2024年第6期65卷 582-586页

作者：刘文博史文丽董娟赵云霞赵梦婷马丙祥河南中医药大学河南省郑州市450000 河南中医药大学第一附属医院

基于“象-形神-气”思维认为儿童抽动障碍的病机涉及“风、痰、火”三象,以风象为主导,痰、火二象为伴随,主张临证时辨识形神异常,总结象的演变,针对脏腑气机灵活辨治。其中抽动相关常见症状多属风象,源自肺失宣肃、肝升太过,采用疏肝... 详细信息

基于“象-形神-气”思维认为儿童抽动障碍的病机涉及“风、痰、火”三象,以风象为主导,痰、火二象为伴随,主张临证时辨识形神异常,总结象的演变,针对脏腑气机灵活辨治。其中抽动相关常见症状多属风象,源自肺失宣肃、肝升太过,采用疏肝木、肃肺金之法,可选小柴胡汤、苍耳子散等方加减;病情迁延、症状怪异者多夹杂痰象,源自脾不升清、胃不降浊,采用升己土、降戊土之法,可选异功散、二陈汤等方加减;病情进展、症状严重者多夹杂火象,源自水火不济、心火偏亢,采用交心肾、济水火之法,可选泻肝丸、六味地黄丸等方加减,以期调气机、和形神、化象于冥冥。

关键词：抽动障碍儿童气机脏腑象思维

Recovery and reuse of floc sludge for high-performance capacitors

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Frontiers of Environmental Science & Engineering 2022年第6期16卷 133-144页

作者： Di Zhang Rong Hou wenbo Wang He zhao Beijing Engineering Research Center of Process Pollution Control CAS Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

In this paper,floc sludge was transformed into porous carbon matrix composites by acidification and KOH activation at high temperature and used as an electrode material for application in *** effects of different treatment processes on the electrochemical properties of sludge materials were *** results of electrochemical tests showed that the sludge electrode exhibited excellent energy storage performance after HNO3 acidification and KOH activation with a mass ratio of 3:1(KOH/C).The specific capacitance of the sludge electrode reached 287 F/g at a current density of 1 A/*** addition,the sludge electrode material showed excellent cycle stability(specific capacity retained at 93.4%after 5000 cycles at 5 A/g).Based on XRD,FTIR,SEM,TEM,and BET surface analysis,the morphology of sludge electrode materials can be effectively regulated by chemical *** best-performing material showed a 3D porous morphology with a large specific surface area(2588 m^(2)/g)and optimal pore size distribution,improving ion channels and charge *** to the life cycle assessment of floc sludge utilization,it reduced the resource consumption and toxicity risk by more than 90%compared with ordinary sludge disposal *** work provided a cost-effective and eco-friendly sludge reuse method and demonstrated the application potential of sludge-based materials in high-performance supercapacitors.

关键词： Floc sludge Porous carbon electrode Energy storage performance Supercapacitors

Thermomechanical coupling effect on characteristics of oxide film during ultrasonic vibration-assisted ELID grinding ZTA ceramics

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Chinese Journal of Aeronautics 2021年第6期34卷 125-140页

作者： Fan CHEN Guangxi LI Bo zhao wenbo BIE School of Electrical and Mechanical Engineering Pingdingshan UniversityPingdingshan 467000China School of Mechanical and Power Engineering Henan Polytechnic UniversityJiaozuo 454003China

Ultrasonic vibration-assisted ELID(UVA-ELID)grinding is utilized as a novel and highly efficient processing method for hard and brittle materials such as *** this study,the UVA-ELID grinding ZTA ceramics is employed to investigate the influence of thermomechanical loading on the characteristics of oxide *** on the fracture mechanics of material,the model of internal stress for oxide film damage is *** thermomechanical loading is composed of mechanical force and the thermal stress generating from grinding *** theoretical model is established for the mechanical force,thermal stress and internal stress *** the finite element analysis method is used to simulate the theoretical *** mechanical force and grinding temperature is measured during the actual grinding *** the grinding process,the effect of grinding wheel speed and grinding depth on the thermomechanical force and the characteristics of oxide film is *** with the conventional ELID(CELID)grinding,the mechanical force decreased by 25.6%and 22.4%with the increase of grinding wheel speed and grinding depth respectively,and the grinding temperature declined by 10.7%and12.8%during the UVA-ELID *** thermal stress in the latter decreased by 16.3%and20.8%respectively,and internal stress reduced by 12.3%and 15.6%.It was experimentally found that the topographies of oxide layer on the surface of the wheel and the machined surface in the latter was better than that in the *** results indicate that the action of ultrasonic vibration establish a significant effect on the ***,it should be well considered for future reference when processing the ZTA ceramics.

关键词： Oxide film Surface quality Thermomechanical loading Ultrasonic vibration-assisted ELID grinding ZTA ceramics

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碳纳米管对酚醛树脂基复合材料性能的影响

兵工学报 2024年第5期45卷 1547-1554页

作者：孔国强安振河赵寰于秋兵邵蒙李莹魏化震王康刘文博山东非金属材料研究所山东济南250031 某军事代表局驻某地区军事代表室山东济南250031

为制备具有隔热、耐烧蚀、电磁屏蔽等多功能集成的结构复合材料,满足武器装备对多功能复合材料的迫切需求,采用超声波分散的工艺将碳纳米管(Carbon Nanotubes,CNTs)在树脂基体中进行分散,并制备CNTs改性国产碳布/酚醛复合材料。经对CNT... 详细信息

为制备具有隔热、耐烧蚀、电磁屏蔽等多功能集成的结构复合材料,满足武器装备对多功能复合材料的迫切需求,采用超声波分散的工艺将碳纳米管(Carbon Nanotubes,CNTs)在树脂基体中进行分散,并制备CNTs改性国产碳布/酚醛复合材料。经对CNTs改性国产碳布/酚醛复合材料的层间性能检测,当CNTs含量达到1.5%时,其层间剪切强度提高57.4%。对CNTs改性定向国产碳纤维/酚醛树脂复合材料的弯曲性能、层间性能和抗冲击性能都进行检测。检测结果表明,经CNTs改性后,定向国产碳纤维/酚醛复合材料的力学性能和模量均得到了大幅提高。对CNTs改性短切高强玻璃纤维/酚醛树脂基复合材料的导电性能和导热性能进行了研究。研究结果表明:随着CNTs含量的提高,短切高强玻璃纤维/酚醛树脂基复合材料的电阻率呈数量级速度降低,当CNTs含量达到14%时,复合材料的电阻率由10^(10)Ω·m降低到了10^(-2)Ω·m,复合材料由绝缘体转变为导体;当CNTs含量小于6%时,复合材料的导热系数虽有提高,但与复合材料电性能相比提高幅度不大。

关键词：碳纳米管碳布/酚醛复合材料碳纤维/酚醛复合材料导电隔热

一个可用于信息安全领域的复合混沌系统的构建与分析

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河北师范大学学报（自然科学版） 2024年第3期48卷 244-252页

作者：杨旭升赵文波兰州文理学院教育学院甘肃兰州730010 天水师范学院电子信息与电气工程学院甘肃天水741001

使用扰动算法,利用PLCM映射与Intertwining Logistic映射构造出一个三维复合混沌系统.经递归定量分析并使用尺度指数(scale index)等工具评估得出,新系统密钥空间大,抗差分攻击能力强,产生的混沌序列非周期度高、结构复杂.因此,新复合... 详细信息

使用扰动算法,利用PLCM映射与Intertwining Logistic映射构造出一个三维复合混沌系统.经递归定量分析并使用尺度指数(scale index)等工具评估得出,新系统密钥空间大,抗差分攻击能力强,产生的混沌序列非周期度高、结构复杂.因此,新复合混沌系统可应用于信息安全领域.

关键词：混沌扰动算法复合混沌系统信息安全系统

商业模式创新对企业价值创造的影响及机理分析——以泡泡玛特为例

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中国资产评估 2024年第3期 40-50页

作者：王玲玲赵文博郑州航空工业管理学院河南450046

互联网的出现改变了基本的商业竞争环境和经济规则,标志着“数字经济”时代的来临,在越来越多的企业开始进行创新后,泡泡玛特也紧追潮流,进行了商业模式创新。本文以泡泡玛特为例,研究其开展商业模式创新的动因、路径以及商业模式创新... 详细信息

互联网的出现改变了基本的商业竞争环境和经济规则,标志着“数字经济”时代的来临,在越来越多的企业开始进行创新后,泡泡玛特也紧追潮流,进行了商业模式创新。本文以泡泡玛特为例,研究其开展商业模式创新的动因、路径以及商业模式创新的价值创造机制和效果。研究发现,泡泡玛特在价值主张、价值创造、价值传递和价值获取四个方面分别实现了创新,并由此推动企业运营社群、创建一体化平台、延长IP价值增长期,这些举措影响了公司的价值。通过分析商业模式创新对泡泡玛特价值创造的影响和机理,以期对其他同行业企业具有一定的借鉴和启发。

关键词：商业模式创新价值创造泡泡玛特

A point cloud segmentation method for power lines and towersbased on a combination of multiscale density features andpoint-based deep learning

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International Journal of Digital Earth 2023年第1期16卷 620-644页

作者： wenbo zhao Qing Dong Zhengli Zuo Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijingPeople’s Republic of China International Research Center of Big Data for Sustainable Development Goals BeijingPeople’s Republic of China University of Chinese Academy of Sciences BeijingPeople’s Republic of China Laboratory of Target Microwave Properties Deqing Academy of Satellite ApplicationsZhejiangPeople’s Republic of China

The point segmentation of power lines and towers aims to use unmanned aerial vehicles(UAVs)for the inspection of power facilities,risk detection and *** of the unclear spatial relationship between the point clouds,the point segmentation of power lines and towers is *** this paper,the power line and tower point datasets are constructed using Light Detection and Ranging(LiDAR)and a point segmentation method is proposed based on multiscale density features and a point-based deep learning ***,the data are blocked and the neighbourhood is ***,the point clouds are downsampled to produce sparse point *** point clouds before and after sampling are rotated,and their density is ***,a direct mapping method is selected to fuse the density information;a lightweight network is built to learn the ***,the point clouds are segmented by concatenating the local features provided by *** algorithm performs effectively on different types of power lines and *** mean interaction over union is 82.73%,and the overall accuracy can reach 91.76%.This approach can achieve the end-to-end integration of segmentation and provide theoretical support for the segmentation of large scenic point clouds.

关键词： Power lines and power towers point cloud segmentation multiscale density features PointCNN

Hybrid Weighted l1-Total Variation Constrained Reconstruction for MR Image

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Chinese Journal of Electronics 2014年第4期23卷 747-752页

作者： zhao Di DU Huiqian MEI wenbo School of Information and Electronics Beijing Institute of Technology

Compressed sensing based Magnetic resonance(MR) image reconstruction can be done by minimizing the sum of least square data fitting item, the Total variation(TV) and l1 norm regularizations. In this paper, inspired by the conventional constrained reconstruction model, we propose a hybrid weighted l1-TV minimization method to reconstruct MR image. We introduce the iterative mechanism to update the weights for l1 and TV norms adaptively. The weights vary at each element of the image matrix according to the presented weights selection strategy. Experiments on Shepp-Logan phantom and practical MR images demonstrate the proposed method can preserve image details and obtain improved reconstruction quality compared to the traditional CS-MRI method and other weighted methods.

关键词： Compressed sensing(CS) Magnetic resonance imaging(MRI) Image reconstruction Weighted l 1 norm Weighted Total variation(TV)