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Proactive eviction of flow entry for SDN based on hidden Markov model

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Frontiers of Computer Science 2020年第4期14卷 107-116页

作者： gan HUANG Hee yong YOUN College of Software Sungkyunkwan UniversitySuwon440746Korea

With the fast development of software defined network(SDN),numerous researches have been conducted for maximizing the performance of ***,flow tables are utilized in OpenFlows witch for *** to the space limitation of flow table and switch capacity,various issues exist in dealing with the *** existing schemes typically employ reactive approach such that the selection of evicted entries occurs when timeout or table miss *** this paper a proactive approach is proposed based on the prediction of the probability of matching of the *** eviction occurs proactively when the utilization of flow table exceeds a threshold,and the flow entry of the lowest matching probability is *** matching probability is estimated using hidden Markov model(HMM).Computersimulation reveals that it significantly enhances the prediction accuracy and decreases the number of table misses compared to the standard Hard timeout scheme and Flow master scheme.

关键词： SDN OpenFlow flow entry eviction HMM matching probability

Indium tin oxide nanosized composite powder prepared using waste ITO target

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Rare Metals 2005年第3期24卷 277-282页

作者： LIU Jiaxiang gan yong ZENG Shengnan The Key Laboratory for Science and Technology of Controllable Chemical Reactions Ministry of Education College of Materials Science andEngineering Beijing University of Chemical Technology Beijing 100029 China

Indium tin oxide （ITO） nano-particles were prepared directly using waste ITO target, which had been coated by magnetron controlled sputtering. The waste ITO target was cleaned with de-ionized water, and then dissolved in acid, filtrated, neutralized, manipulated through azeotropic distillation and finally dried, and in this way the precursor of indium tin hydroxide was obtained. The nanosized rio composite powder was prepared after the precursor heat-treated at 500℃ for 2 h. TEM images show a narrow distribution of particle size is 5-20 nm and the particle size can be controlled. Its granule has a spherical shape and the dispersion of the particle is well. x-ray diffraction （xRD） patterns indicate the only cubic In2O3 phase in the ITO powder hot-treated at 500℃. The purity of ITO composite powder is 99.9907%. The content of radium within filtrate was detected by using the EDTA titration of determination of indium in the ITO powder and ITO target. Appropriate amount of SnCl4.5H2O was dissolved in the filtrate, and then ITO powder containing 10 wt.% SnO2 was successfully prepared by heat-treating.

关键词： waste ITO target nanosized ITO composite powder chemical technique microstructure

On Proof of the C^1 Stability Conjecture

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Acta Mathematica Sinica,English Series 2005年第3期21卷 533-540页

作者： yong ZHANG Shao Bo gan School of Mathematical Sciences Soochow University Suzhou 215006 P. R. China School of Mathematical Sciences Peking University Beijing 100084 P. R. China

It seems that in Mane＇s proof of the C^1 Ω-stability conjecture containing in the famous paper which published in I. H. E. S. （1988）, there exists a deficiency in the main lemma which says that for f ∈F^1 （M） there exists a dominated splitting TMPi（f） =Ei^s the direlf sum of E and F Fi^u（O 〈 i 〈 dim M） such that if Ei^s is contracting, then Fi^u is expanding. In the first part of the paper, we give a proof to fill up this deficiency. In the last part of the paper, we, under a weak assumption, prove a result that seems to be useful in the study of dynamics in some other stability context.

关键词： The C^1 stability conjecture Dominated splitting Shadowing property Axiom A No-cycle condition

Review on residual stress and its effects on manufacturing of aluminium alloy structural panels with typical multi-processes

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Chinese Journal of Aeronautics 2023年第5期36卷 96-124页

作者： yong LI Wanni gan Wenbin ZHOU Dongsheng LI School of Mechanical Engineering and Automation Beihang UniversityBeijing 100191China Shenzhen Institute of Beihang University Shenzhen 518057China Department of Mechanical Engineering Imperial College LondonLondon SW72AZUK

In the aerospace industry,integrated aluminium alloy plates and stiffened panels with high accuracy and performance attract significant *** manufacture these panels as integrity with high accuracy,multiple processes need to be utilised,such as machining,welding and *** the whole manufacturing chain,residual stresses can be generated and redistributed in the components among different *** residual stress would significantly affect the shapes and properties of the final ***,these great effects are not well considered in the design and manufacturing *** paper aims to draw a general understanding of the residual stress generated in the pre-manufacturing processes and its effects on subsequent manufacturing *** mechanisms and distributions of residual stresses generated in typical premanufacturing processes of structural panels,including machining,welding and additive manufacturing(AM),are firstly *** detailed effects of generated residual stresses on distortion and application properties in subsequent manufacturing processes are then *** addition,current methods developed for the investigation of residual stress effect in multi-processes manufacturing are critically reviewed,including experimental,analytical,finite element(FE)and machine learning ***,the future development trend of methods for residual stress consideration and control in the design of manufacturing processes is summarised,providing comprehensive guidance to achieve the high accurate manufacturing of aluminium alloy structural components.

关键词： Residual stress Stiffened panel Aluminium alloy Multi-processes manufacturing Machining Welding Additive manufacturing

Drying characteristics, functional properties and in vitro digestion of purple potato slices dried by different methods

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Journal of Integrative Agriculture 2019年第9期18卷 2162-2172页

作者： QIU gan JIANG yong-li DENG Yun Department of Food Science and Technology Shanghai Jiao Tong University

The drying characteristics,physico-chemical and functional properties,as well as starch digestibility,of purple potato slices dried using different methods(such as,vacuum freeze-drying,VFD;hot-air drying,HAD;air-impingement jet drying,AIJD;and far-infrared assisted heat-pump drying,FIHPD)were *** rate was the highest(3.0 g 100 g^-1 min^-1)using AIJD,followed by FIHPD and HAD,and the rate of VFD was the lowest one(0.3 g 100 g^-1 min^-1).Drying data were fitted to 12 thin-layer drying models,with the Midilli model giving the best ***,AIJD showed higher diffusivity(5.5×10^-10 m^2 s^–1)and energy efficiency(55 J g^-1)than any other drying method used in this *** reference to the samples dried by VFD,the starch granules of the samples obtained by HAD,FIHPD,and AIJD exhibited different extent of disruption,which significantly increased their water absorption capacity,swelling power,and in vitro digestibility,but decreased the peak *** sample resulting from AIJD had the greatest water absorption capacity(7.9 g g^-1)and solubility(21.6%),but the smallest syneresis rate(48%).Good correlation coefficients(R^2>0.98)implied that the pseudofirst order kinetic model adequately described the rate and extent of starch digestion of dried potato *** from AIJD and FIHPD showed the highest digestibility percentages,reaching to 72.4 and 72.5%.Based on the drying rate,specific energy consumption,functional properties and digestibility,AIJD appeared to be quite effective and suitable to be transferred on the industry scale.

关键词： purple potato air-impingement jet drying(AIJD) drying characteristics flour properties starch digestibility

Analysis of the factors affecting thermal evolution of hot rolled steel during coil cooling

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Journal of University of Science and Technology Beijing 2006年第2期13卷 139-143页

作者： Jiefeng Cheng Zhengdong Liu Han Dong yong gan Central Iron and Steel Research Institute Beijing 100081 China

The thermal evolution of steel coil during cooling was simulated and investigated by the use of in-house Q-CSP software. The dependence of the thermal evolution of steel coil on cooling methods, temperature distribution of the strip before coiling, coil size and steel grades was also discussed. The study plays a significant role in helping steel makers to better understand and control the cooling process.

关键词： steel coil temperature distribution cooling method simulation

Verifier-local revocation group signatures with backward unlinkability from lattices

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Frontiers of Information Technology & Electronic Engineering 2022年第6期23卷 876-892页

作者： Yanhua ZHANG ximeng LIU Yupu HU yong gan Huiwen JIA College of Computer and Communication Engineering Zhengzhou University of Light IndustryZhengzhou 450001China College of Mathematics and Computer Science Fuzhou UniversityFuzhou 350108China Stale Key Laboratory of Integrated Service Networks Xidian UniversityXi’an 710071China College of Information Engineering Zhengzhou University of TechnologyZhengzhou 450044China School of Mathematics and Information Science Guangzhou UniversityGuangzhou 510006China

For group signature(GS)supporting membership revocation,verifier-local revocation(VLR)mechanism seems to be a more flexible choice,because it requires only that verifiers download up-to-date revocation information for signature verification,and the signers are not *** a post-quantum secure cryptographic counterpart of classical number-theoretic cryptographic constructions,the first lattice-based VLR group signature(VLR-GS)was introduced by Langlois et al.(2014).However,none of the contemporary lattice-based VLR-GS schemes provide backward unlinkability(BU),which is an important property to ensure that previously issued signatures remain anonymous and unlinkable even after the corresponding signer(i.e.,member)is *** this study,we introduce the first lattice-based VLR-GS scheme with BU security(VLR-GS-BU),and thus resolve a prominent open problem posed by previous *** new scheme enjoys an O(log N)factor saving for bit-sizes of the group public-key(GPK)and the member’s signing secret-key,and it is free of any public-key *** the random oracle model,our scheme is proven secure under two well-known hardness assumptions of the short integer solution(SIS)problem and learning with errors(LWE)problem.

关键词： Group signature Lattice-based cryptography Verifier-local revocation Backward unlikability Short integer solution

Numerical Evaluation of Two k-εTurbulence Model for Predicting Flow and Solidification in Continuous Casting Slab

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Journal of Iron and Steel Research International 2003年第2期10卷 10-16页

作者： LIU He-ping gan yong QIU Sheng-tao Central Iron and Steel Research Institute

A steady three-dimensional fluid flow and solidification model was built based on CFD software by high-Reynolds-number and Lam-Bremhorst low-Reynolds-number k-ε *** the simulation,the fixed-grid enthalpy-porosity technique was used to represent the solidification,and Darcy law was adopted to simulate the flow in mushy *** prediction for steel flow and solidification was evaluated by the comparison of two turbulence *** is found that both Lam-Bremhorst low-Reynolds-number and high-Reynolds-number k-ε models predict the same trend of the steel flow and temperature ***,due to the effect of turbulent flow on heat transfer,the low-Reynolds-number turbulence model predicts longer penetration depth of molten steel in sub-mold region,less shell growth and higher shell surface temperature at the narrow face compared with standard k-ε model.

关键词： continuous slab caster solidification steel flow turbulence model numerical simulation

Action Recognition and Detection Based on Deep Learning: A Comprehensive Summary

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Computers, Materials & Continua 2023年第10期77卷 1-23页

作者： yong Li Qiming Liang Bo gan xiaolong Cui College of Information Engineering Engineering University of PAPXi’an710086China PAP of Heilongjiang Province Heihe DetachmentHeihe164300China National Key Laboratory of Science and Technology on Electromagnetic Energy Naval University of EngineeringWuhan430033China Joint Laboratory of Counter Terrorism Command and Information Engineering Engineering University of PAPXi’an710086China

Action recognition and detection is an important research topic in computer vision,which can be divided into action recognition and action *** present,the distinction between action recognition and action detection is not clear,and the relevant reviews are not ***,this paper summarized the action recognition and detection methods and datasets based on deep learning to accurately present the research status in this ***,according to the way that temporal and spatial features are extracted from the model,the commonly used models of action recognition are divided into the two stream models,the temporal models,the spatiotemporal models and the transformer models according to the *** this paper briefly analyzes the characteristics of the four models and introduces the accuracy of various algorithms in common data ***,from the perspective of tasks to be completed,action detection is further divided into temporal action detection and spatiotemporal action detection,and commonly used datasets are *** the perspectives of the twostage method and one-stage method,various algorithms of temporal action detection are reviewed,and the various algorithms of spatiotemporal action detection are summarized in ***,the relationship between different parts of action recognition and detection is discussed,the difficulties faced by the current research are summarized in detail,and future development was prospected。

关键词： Action recognition action detection deep learning convolutional neural networks dataset