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A Double-Compensation-Based Federated Learning Scheme for Data Privacy Protection in a Social IoT Scenario

Computers, Materials & Continua 2023年第7期76卷 827-848页

作者： Junqi Guo Qingyun xiong minghui Yang Ziyun Zhao School of Artificial Intelligence Beijing Normal UniversityBeijing100875China Engineering Research Center of Intelligent Technology and Educational Application Ministry of EducationBeijing100875China

Nowadays,smart wearable devices are used widely in the Social Internet of Things(IoT),which record human physiological data in real *** protect the data privacy of smart devices,researchers pay more attention to federated *** the data leakage problem is somewhat solved,a new challenge has *** federated learning shortens the convergence time,while it has time delay and data heterogeneity *** of the two problems harm the *** overcome these issues,we propose an asynchronous federated learning scheme based on double compensation to solve the problem of time delay and data heterogeneity *** scheme improves the Delay Compensated Asynchronous Stochastic Gradient Descent(DC-ASGD)algorithm based on the second-order Taylor expansion as the delay *** adds the FedProx operator to the objective function as the heterogeneity ***,the proposed scheme motivates the federated learning process by adjusting the importance of the participants and the central *** conduct multiple sets of experiments in both conventional and heterogeneous *** experimental results show that our scheme improves the accuracy by about 5%while keeping the complexity *** can find that our scheme converges more smoothly during training and adapts better in heterogeneous environments through numerical *** proposed double-compensation-based federated learning scheme is highly accurate,flexible in terms of participants and smooth the training *** it is deemed suitable for data privacy protection of smart wearable devices.

关键词： Social Internet of Things smart wearable devices data privacy asynchronous federated learning

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The Influential Factors of Semi-Flexible Pavement Cracking Performance

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Journal of Wuhan University of Technology(Materials Science) 2022年第5期37卷 953-962页

作者： xiong Zijia GONG minghui HONG Jinxiang DENG Cheng Jiangsu Sobute New Materials.Co.Ltd Nanjing210000China State Key Laboratory of High Performance Civil Engineering Materials Nanjing210000China

The cracking performance of semi-flexible pavement(SFP) was investigated by using the semi-circular bending(SCB) test in this paper. Thirteen grouting slurries were prepared. The compressive strength of these materials ranges from 3 to 100 MPa. The relationship between the compressive strength of the grouting slurry and the cracking property of SFP was obtained at different loading rates and different temperatures. The peak load, fracture energy(E), flexible index(FI), and cracking resistance index(CRI) were calculated to determine the material performance. The results show that the compressive strength of the grout influences the cracking behavior. With a higher comprehensive strength grouting slurry, the FI value of SFP decreased initially and then increased slightly at 25 ℃ in 50 mm/min. The CRI value decreased at the same time. E values changed just according to the test temperature and loading rate. The damage paths of SFP are different. The damage path of the SFP sample appears as diffuse damage at 1 mm/min at 60 ℃ or clean damage at 50 mm/min at 25 ℃. These findings indicate that there is a correlation between the compressive strength of grouting slurry and SFP cracking behavior. The cracking form is influenced by loading rate and temperature.

关键词： semi-flexible pavement cracking performance SCB grouting slurry compressive strength

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An investigation on failure behavior of semi-flexible composite mixture at different temperatures

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Journal of Road Engineering 2023年第2期3卷 186-202页

作者： Zijia xiong minghui Gong Jinxiang Hong Lei Zhang School of Transportation Southeast UniversityNanjing 210096China Sobute New Materials Co.Ltd. Nanjing 211103China State Key Laboratory of High Performance Civil Engineering Materials Nanjing 211103China Jiangsu Research Institute of Building Science Co.Ltd. Nanjing 210008China

Semi-flexible composite mixture(SFCM)is a kind of pavement material formed by pouring cement-based grout material into a porous asphalt mixture with air voids from 20%to 30%.SFCM is widely used for its outstanding anti-rutting *** mechanical performance is complicated due to its heterogeneity and interlocking *** to the present study,asphalt deforms at different temperatures,whereas cement-based grout has no similar *** research focuses on the temperature-based performance of ***,the study was on the thermal performance of SFCM by seven open-graded asphalt mixture skeletons with different porosities and two types of grouts with early strength(ES)and high strength(HS).The test temperatures ranged from 10℃to 60℃.The mechanical investigation was performed using the semi-circular-bending(SCB)and beam bending *** strain sensor was used for analyzing the thermal performance of *** results show that the temperature significantly affected the SFCM's *** porosity was selected for three sections based on the trend of fracture energy(Gf)curves at 25℃.The turning points were the porosity values of 20%and 26%.The initiation slope during elastic deformation increases with the porosity *** trend was more evident at intermediate *** shrink strain of SFCM was lower than that of the usual asphalt mixture(AC).The thermal stress of the SFCM filled with HS(HS-SFCM)was higher than that of the SFCM filled with ES(ES-SFCM)at 10℃.Moreover,the thermal failure characteristics of SFCM were influenced by porosity.

关键词： Semi-flexible composite mixture Temperature SCB Strain sensor

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Roughness characterization and shearing dislocation failure for rock-backfill interface

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1167-1176页

作者： Meifeng Cai Zhilou Feng Qifeng Guo xiong Yin minghui Ma Xun Xi Key Laboratory of High-Efficient Mine and Safety of Metal Mines of Ministry of Education Beijing 100083China Key Laboratory of Urban and Underground Space Engineering University of Science and Technology BeijingBeijing 100083China Shandong Gold Group Co LtdJinan 250102China

Shearing dislocation is a common failure type for rock–backfill interfaces because of backfill sedimentation and rock strata movement in backfill mining *** paper designed a test method for rock–backfill shearing *** digital image techno-logy and three-dimensional(3D)laser morphology scanning techniques,a set of 3D models with rough joint surfaces was ***,the mechanical behavior of rock–backfill shearing dislocation was investigated using a direct shear *** effects of interface roughness on the shear–displacement curve and failure characteristics of rock–backfill specimens were *** 3D fractal dimen-sion,profile line joint roughness coefficient(JRC),profile line two-dimensional fractal dimension,and the surface curvature of the frac-tures were *** correlation characterization of surface roughness was then analyzed,and the shear strength could be measured and calculated using *** results showed the following:there were three failure threshold value points in rock–backfill shearing dis-location:30%–50%displacement before the peak,70%–90%displacement before the peak,and 100%displacement before the peak to post-peak,which could be a sign for rock–backfill shearing dislocation *** surface JRC could be used to judge the rock–backfill shearing dislocation failure,including post-peak sliding,uniform variations,and gradient change,corresponding to rock–backfill disloca-tion failure on the field *** research reveals the damage mechanism for rock–backfill complexes based on the free joint surface,fills the gap of existing shearing theoretical systems for isomerism complexes,and provides a theoretical basis for the prevention and control of possible disasters in backfill mining.

关键词： rock–backfill roughness correlation characterization shearing dislocation interface failure

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生态学野外实习基地的数字化模型研究

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中国科技信息 2010年第17期 213-215页

作者：刘建宏杨丽英熊忠平潘涌智黎小军熊明辉新余学院云南省森林灾害预警与控制重点实验室

生态学野外实习是实践教学的重要环节。运用谷歌地球(Google Earth)免费提供的高分辨率卫星影像对我校的3个实习基地进行了数字化教学模型研究。

关键词：实习基地生态学谷歌地球数字化模型

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基于GIS的矿山车辆GPS监控系统开发设计

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露天采矿技术 2017年第7期32卷 54-56,60页

作者：粟闯杜年春邓军谢翔黄毅熊明辉中国有色金属长沙勘察设计研究院有限公司湖南长沙410011

系统采用微软的.NET FrameWork框架的相关技术,结合SuperMapGIS平台与空间数据库技术,设计并建立基于GIS、矿山GPS车辆监控系统的业务流程。根据车辆位置进行车辆行驶范围与行驶道路的分析,丰富了车辆监控业务信息及提高了监控系统的监... 详细信息

系统采用微软的.NET FrameWork框架的相关技术,结合SuperMapGIS平台与空间数据库技术,设计并建立基于GIS、矿山GPS车辆监控系统的业务流程。根据车辆位置进行车辆行驶范围与行驶道路的分析,丰富了车辆监控业务信息及提高了监控系统的监控效果,并介绍了车辆监控系统的整体结构和模块划分,给出了一个道路匹配算法与大数据下系统性能解决方案,该系统在实际工程运用中取得了良好的效果。

关键词：车辆监控 GIS GPS 道路匹配

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In-situ doping strategy for improving the photocatalytic hydrogen evolution performance of covalent triazine frameworks

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Science China Chemistry 2023年第8期66卷 2363-2370页

作者： minghui Chen Ji xiong Xiangyu Li Quan Shi Ting Li Yaqing Feng Bao Zhang School of Chemical Engineering and Technology Tianjin UniversityTianjin300350China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin300192China

A highly conjugated network of covalent triazine frameworks(CTFs)on the one hand promotes light-harvesting,but on the other hand,also results in high carrier recombination which eventually limits their photocatalytic hydrogen evolution reaction(HER)***,strategies to favorably tune the electronic configuration of CTFs for efficient photocatalytic HERs need to be developed,but still remain ***,a simple in-situ defect strategy involving element doping is developed for the first time to introduce a heteroatom including S and Se into CTF-1 via the condensation of aldehydes with the mixture of the terephthalimidamide and the S-or Se-substituted terephthalimidamide under mild *** doping content(X)is varied,resulting in a series of S-and Se-doped CTFs,named CTFS-1-X and CTFSe-1-X,***,for the S-doped CTFs,CTFS-1-10 shows the most excellent HER rate(4,992.3μmol g^(-1)h^(-1))from water splitting,while for the Se-doped ones,CTFSe-1-10 exhibits a photocatalytic HER rate of 5,792.8μmol g^(-1)h^(-1),both of which far surpass undoped CTFs(693.3μmol g^(-1)h^(-1)).In-depth studies indicate that the introduction of S or Se atoms into CTFs could extend the light absorption and promote photo-generated electron-hole pairs ***,S-or Se-doping could create heterogeneous electronic configuration in CTFs,which can help to suppress carrier recombination.

关键词： covalent triazine frameworks heteroatom doping hydrogen evolution

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螺旋CT仿真支气管内窥镜成像方法及其临床应用

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中国医学影像学杂志 2001年第1期9卷 18-20页

作者：熊明辉张挽时王东宋云龙鲁晓燕时惠平北京市空军总医院磁共振科 100036

目的 :评价螺旋CT仿真支气管内窥镜 (CTVB)临床应用价值。材料和方法 :对 5 2例气管、支气管行螺旋CT(GEHiSpeedAdvantageCT/i)扫描 ,将其数据传至AdvantageWindows 3 .1版本工作站 ,用NavigatorSmooth软件建成酷似纤维支气管镜所见的C... 详细信息

目的 :评价螺旋CT仿真支气管内窥镜 (CTVB)临床应用价值。材料和方法 :对 5 2例气管、支气管行螺旋CT(GEHiSpeedAdvantageCT/i)扫描 ,将其数据传至AdvantageWindows 3 .1版本工作站 ,用NavigatorSmooth软件建成酷似纤维支气管镜所见的CTVB图像 ,并与纤维支气管镜对照。其中 4例与病理标本对照。结果 :CTVB能 10 0 %地观察到段以上支气管和 80 %以上亚段支气管。 2 7例中心型肺癌发现支气管狭窄 2 3例 ,闭塞 4例 ,肺癌术后支气管残端 4例 ,气管狭窄 2例 ,右中间段支气管憩室 1例。结论 :CTVB是一种新的无创性观察气管、支气管腔的方法 ,酷似纤维支气管镜所见。

关键词：肺肿瘤仿真内窥镜螺旋CT 诊断

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A tunable ionic covalent organic framework platform for efficient CO_(2) catalytic conversion

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Frontiers of Chemical Science and Engineering 2024年第1期18卷 25-36页

作者： Ting Li Ji xiong minghui Chen Quan Shi Xiangyu Li Yu Jiang Yaqing Feng Bao Zhang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China Guangdong Laboratory of Chemistry and Fine Chemical Industry Jieyang Center Jieyang 522000China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

The cycloaddition reaction between epoxides and CO_(2) is an effective method to utilize CO_(2) *** organic frameworks(COFs)provide a promising platform for the catalytic CO_(2) transformations on account of their remarkable chemical and physical ***,a family of novel vinylene-linked ionic COFs named TE-COFs(TTE-COF,TME-COF,TPE-COF,TBE-COF)has been facilely synthesized from N-ethyl2,4,6-trimethylpyridinium bromide and a series of triphenyl aromatic aldehydes involving different numbers of nitrogen atoms in the central aromatic *** resulting catalyst TTE-COF with excellent adsorption capacity(45.6 cm3·g^(-1),273 K)exhibited outstanding catalytic performance,remarkable recyclability and great substrate ***,it was also observed that the introduction of nitrogen atom in the precursor led to a great improvement in the crystallinity and CO_(2) adsorption capacity of TE-COFs,thus resulting to a progressively improved catalytic *** work not only illustrated the influence of monomer nitrogen content on the crystallinity and CO_(2) adsorption capacity of TE-COFs but also provided a green heterogeneous candidate for catalyzing the cycloaddition between CO_(2) and epoxides,which shed a light on improving the catalytic performance of the CO_(2) cycloaddition reaction by designing the covalent organic frameworks structures.

关键词： CO_(2)cycloaddition nreaction covalent organic frameworks cyclic carbonate vinylene-linked synergetic effects

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鼻腔及副鼻窦病变骨质改变的CT研究

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医学影像学杂志 2000年第4期10卷 210-213页

作者：王东熊明辉喻敏张挽时徐家兴解放军空军总医院北京市100036

目的　探讨CT所见骨质改变对鼻腔和副鼻窦良、恶性病变的鉴别诊断价值。材料与方法　经病理证实的鼻腔及副鼻窦良、恶性病变 131例 ,在CT图像上盲法观察各种骨质改变的类型、范围和部位。结果　良、恶性病变有骨质破坏者分别占 6 5 .2 %... 详细信息

目的　探讨CT所见骨质改变对鼻腔和副鼻窦良、恶性病变的鉴别诊断价值。材料与方法　经病理证实的鼻腔及副鼻窦良、恶性病变 131例 ,在CT图像上盲法观察各种骨质改变的类型、范围和部位。结果　良、恶性病变有骨质破坏者分别占 6 5 .2 %和 84.7% ;6 6 .7% ,恶性病变的骨质破坏呈多发性 ,良性组以单发为主 (73 .3 % ) ;良、恶性病变突破窦壁的发生率分别是 2 1.7%和 5 2 .9% ;上颌窦内侧壁、筛窦间隔和鼻甲骨质破坏的发生率良、恶性组相似 ,其他骨壁骨质破坏恶性组多于良性组。骨膨胀的发生率两组相近 ,而良性组的骨质硬化多于恶性组 ,神经孔、裂扩大恶性组多于良性组。结论　根据骨质破坏的不同类型、部位和范围 ,CT对鼻腔和副鼻窦良、恶性病变的鉴别诊断可提供较大的帮助。

关键词：鼻腔疾病副鼻窦疾病断层摄影术,X线计算机

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