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Dynamic Hypergraph Modeling and Robustness Analysis for SIoT

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Computer Modeling in Engineering & Sciences 2024年第9期140卷 3017-3034页

作者： Yue wan Nan jiang Ziyu Liu School of Information Engineering East China Jiaotong UniversityNanchang330013China

The Social Internet of Things(SIoT)integrates the Internet of Things(IoT)and social networks,taking into account the social attributes of objects and diversifying the relationship between humans and objects,which overcomes the limitations of the IoT’s focus on associations between *** Intelligence(AI)technology is rapidly *** is critical to build trustworthy and transparent systems,especially with system security issues coming to the *** paper emphasizes the social attributes of objects and uses hypergraphs to model the diverse entities and relationships in SIoT,aiming to build an SIoT hypergraph generation model to explore the complex interactions between entities in the context of intelligent *** hypergraph generation models impose too many constraints and fail to capture more details of real *** contrast,this paper proposes a hypergraph generation model that evolves dynamically over time,where only the number of nodes is *** combines node wandering with a forest fire model and uses two different methods to control the size of the *** new nodes are added,the model can promptly reflect changes in entities and relationships within *** results exhibit that our model can effectively replicate the topological structure of real-world *** also evaluate the vulnerability of the hypergraph under different attack strategies,which provides theoretical support for building a more robust intelligent SIoT hypergraph model and lays the foundation for building safer and more reliable systems in the future.

关键词： Large-scale artificial intelligence Social Internet of Things hypernetwork robustness analysis

Modeling operation amplifier based on VHDL-AMS for TID effect

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Nuclear Science and Techniques 2016年第2期27卷 64-72页

作者： Jin-hui Liu quan wang Ying Zhang Gang Liu Bo wan Research Institute of Computer Peripherals Xidian University

A model of the operational amplifier based on VHDL-AMS is proposed. According to needs of simulating the total ionizing dose(TID) radiation effect, parameters of operational amplifier are taken into account when the performance is specified. The operational amplifier model used for the TID radiation effect simulation is completed after verifying each modeled parameter. And a parameter for describing the external environment is introduced to make the model combined with TID. Finally, an example is used to illustrate the TID effect on the operational amplifier of MC14573, proving the validity of the model.

关键词： VHDL-AMS 运算放大器总剂量效应操作建模辐射效应电离总剂量 TID

Synthesis of α-Hydroxy-ω-Aminotelechelic Polypeptide from α-Amino Acid N-Carboxyanhydrides Catalyzed by Alkali-metal Borohydrides

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Chinese Journal of Polymer Science 2014年第6期32卷 743-750页

作者： Hui Peng wan-li Chen Jie Kong Zhi-quan Shen 凌君 MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Center of Analysis & Measurement Zhejiang University of Technology Shaanxi Key Laboratory of Macromolecular Science and Technology School of Science Northwestern Polytechnical University

It is reported that alkali-metal borohydrides （MBH4, M = Li, Na and K） are efficient catalysts for ring opening polymerization （ROP） of α-amino acid N-carboxyanhydrides （NCAs）. Polypeptides are prepared in quantitative yields with relatively narrow molecular weight distributions （MWDs = 1.1-1.5） which depend on the reaction temperature. End groups of the produced polypeptide are studied in detail by MALDI-ToF MS, IH-NMR, 13C-NMR, IH-1H COSY and IH-13C HMQC analyses. The results indicate that α-hydroxy-ω-aminotelechelic polypeptides are formed which are suitable for post- polymerization functionalization.

关键词： Polypeptide Alkali-metal borohydride α -Amino acid N-carboxyanhydride End group functionalization.

Advances in the Transition Metal-Free C—H Trifluoromethylation

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Chinese Journal of Chemistry 2022年第21期40卷 2582-2594页

作者： Demao Chen Jianwen jiang Jie-Ping wan Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchangJiangxi 330022China.

Trifluoromethyl group is one of the most frequently available and promising functional groups in pharmaceutical,agrochemical as well as material *** synthetic methods for the synthesis of trifluoromethyl functionalized compounds by trifluoromethylation reactions occupies significant position in modern organic *** the other hand,as a typical tool of sustainable synthesis,transition metal-free synthesis possesses unique advantages in atom economy,easy product purification as well as excellent ***,transition metal-free trifluoromethylation reactions constitute the most important approaches for accessing trifluoromethylated ***,the advances in the transition metal-free C—H trifluoromethylation reactions are reviewed for the first *** to the updated state-of-art,both the catalytic reactions by conventional heating chemistry and the more sustainable photocatalysis are included,covering the trifluoromethylation reactions of C(sp^(3))–H bond,aromatic C(sp^(2))–H bond as well as the non-aromatic C(sp^(2))–H bond in different substrates over the last five years(2017—2021).

关键词： C-H bond Trifluoromethylation Transition metal-free Thermochemistry Photocatalysis

Reliability analysis of slopes considering spatial variability of soil properties based on efficiently identified representative slip surfaces

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Journal of Rock Mechanics and Geotechnical Engineering 2020年第3期12卷 642-655页

作者： Bin wang Leilei Liu Yuehua Li quan jiang State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of EducationSchool of Geosciences and Info-PhysicsCentral South UniversityChangsha410083China Hunan Key Laboratory of Nonferrous Resources and Geological Hazards Exploration Changsha410083China School of Geosciences and Info-Physics Central South UniversityChangsha410083China

Slope reliability analysis considering inherent spatial variability(ISV)of soil properties is timeconsuming when response surface method(RSM)is used,because of the"curse of dimensionality".This paper proposes an effective method for identification of representative slip surfaces(RSSs)of slopes with spatially varied soils within the framework of limit equilibrium method(LEM),which utilizes an adaptive K-means clustering ***,an improved slope reliability analysis based on the RSSs and RSM considering soil spatial variability,in perspective of computation efficiency,is *** detailed implementation procedure of the proposed method is well documented,and the ability of the method in identifying RSSs and estimating reliability is investigated via three slope *** show that the proposed method can automatically identify the RSSs of slope with only one evaluation of the conventional deterministic slope stability *** RSSs are invariant with the statistics of soil properties,which allows parametric studies that are often required in slope reliability analysis to be efficiently achieved with *** is also found that the proposed method provides comparable values of factor of safety(FS)and probability of failure(Pf)of slopes with those obtained from direct analysis and lite rature.

关键词： Slope reliability analysis Spatial variability Representative slip surfaces(RSSs) Response surface method(RSM) Random field simulation

Theoretical verification of the rationality of strain energy storage index as rockburst criterion based on linear energy storage law

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第6期14卷 1737-1746页

作者： Fengqiang Gong Song Luo quan jiang Lei Xu Engineering Research Center of Safety and Protection of Explosion and Impact of Ministry of Education(ERCSPEIME) Southeast UniversityNanjing211189China School of Civil Engineering Southeast UniversityNanjing211189China School of Resources and Safety Engineering Central South UniversityChangsha410083China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China

The rationality of using strain energy storage index(Wet)for evaluating rockburst proneness was theoretically verified based on linear energy storage(LES)law in this *** LES law is defined as the linear relationship between the elastic strain energy stored inside the solid material and the input strain energy during *** is used to determine the elastic strain energy and dissipated strain energy of rock specimens at various loading/unloading stress *** results showed that the Wetvalue obtained from experiments was close to the corresponding theoretical one from the LES ***,with an increase in the loading/unloading stress level,the ratio of elastic strain energy to dissipated strain energy converged to the peak-strength strain energy storage index(Wp et).This index is stable and can better reflect the relative magnitudes of the stored energy and the dissipated energy of rocks at the whole pre-peak stage than the strain energy storage *** peak-strength strain energy storage index can replace the conventional strain energy storage index as a new index for evaluating rockburst proneness.

关键词： Rockburst criterion Strain energy storage index Linear energy storage(LES)law Peak-strength strain energy storage index

Fabrication of Optical Tunable Helical Thin Films

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Journal of Materials Science & Technology 2012年第2期28卷 97-102页

作者： Linxin Hu Peng wang Xingyang wan Shaoji jiang State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen University Guangzhou 510275 China

Circular polarization selection of light is an important property of helical *** helical thin films fabricated by glancing angle deposition can provide both circular polarization selection and wavelength tuning in this *** selective transmissions were depicted in calculations and *** wavelength tuning mechanism was revealed as the relationship between peak wavelength and deposition ***,tunable circular polarization components can be designed according to the mechanism mentioned above and fabricated by glancing angle deposition *** applications include tunable optical filters,optical pulse-shapers,biosensors etc.

关键词： Glancing angle deposition Helical thin films Circular polarization selectivetransmission Wavelength tuning

Influence of Er_2O_3 content on microstructure and mechanical properties of ZTA-TiO_2 composites

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Journal of Rare Earths 2019年第3期37卷 299-304页

作者： Yudong Sui Li'na Han Yehua jiang quan Shan School of Materials Science and Engineering Kunming University of Science and Technology

The influence of Er_2 O_3 addition on the phase evolution and mechanical properties of sintered(1600 ℃,4 h) ZTA(yttria stabilized zirconia toughened alumina)-TiO_2 composites was investigated. The SEM and XRD results reveal the formation of a new erbium zirconium oxide,Zr_3 Er_4 O_(12),with a granulate morphology when Er_2 O_3 content is higher than 1 wt%. The grain sizes of both Al_2 O_3 and yttria-stabilized zirconia phases decrease with an increase in the Er_2 O_3 content. The relative density, Vickers hardness and fracture toughness of the composites are found to be strongly dependent on their grain sizes, relative densities and the formation of the Zr_3 Er_4 O_(12) secondary phases. The composite with 5 wt% Er_2 O_3 shows the highest relative density(99.93%), Vickers hardness(1752 HV) and fracture toughness(7.92 MPa·m^(1/2)).

关键词： Er2O3 Microstructure Vickers hardness Fracture toughness ZTA-TiO2 ceramic composite Rare earths

Modified Frequency Scaling Algorithm for FMCW SAR Data Processing

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Chinese Journal of Aeronautics 2007年第4期20卷 339-345页

作者： jiang Zhihong Huang Fukan wan Jianwei Cheng Zhu College of Electronic Science and Engineering National University of Defense Technology Changsha 410073 China

This paper presents a modified frequency scaling algorithm for frequency modulated continuous wave synthetic aperture radar （FMCW SAR） data processing. The relative motion between radar and target in FMCW SAR during reception and between transmission and reception will introduce serious dilation in the received signal. The dilation can cause serious distortions in the reconstructed images using conventional signal processing methods. The received signal is derived and the received signal in range-Doppler domain is given. The relation between the phase resulting from antenna motion and the azimuth frequency is analyzed. The modified frequency scaling algorithm is proposed to process the received signal with serious dilation. The algorithm can effectively eliminate the impact of the dilation. The algorithm performances are shown by the simulation results.

关键词： FMCW radar SAR radar imaging frequency scaling algorithm