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Attribute-Based Access Control for Multi-Authority Systems with Constant Size Ciphertext in Cloud Computing

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China Communications 2016年第2期13卷 146-162页

作者： chen yanli SONG Lingling YANG Geng College of Computer Nanjing University of Post &Telecommunications Overseas Cooperation & Exchange Offi ce Nanjing University of Post &Telecommunications

In most existing CP-ABE schemes, there is only one authority in the system and all the public keys and private keys are issued by this authority, which incurs ciphertext size and computation costs in the encryption and decryption operations that depend at least linearly on the number of attributes involved in the access policy. We propose an efficient multi-authority CP-ABE scheme in which the authorities need not interact to generate public information during the system initialization phase. Our scheme has constant ciphertext length and a constant number of pairing computations. Our scheme can be proven CPA-secure in random oracle model under the decision q-BDHE assumption. When user's attributes revocation occurs, the scheme transfers most re-encryption work to the cloud service provider, reducing the data owner's computational cost on the premise of security. Finally the analysis and simulation result show that the schemes proposed in this thesis ensure the privacy and secure access of sensitive data stored in the cloud server, and be able to cope with the dynamic changes of users' access privileges in large-scale systems. Besides, the multi-authority ABE eliminates the key escrow problem, achieves the length of ciphertext optimization and enhances the effi ciency of the encryption and decryption operations.

关键词： cloud computing attribute-basedencryption access control multi-authority constant ciphertext length attribute revocation

Isothermal corrosion Fe_3Si alloy in liquid zinc

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Journal of University of Science and Technology Beijing 2007年第1期14卷 52-55页

作者： Wenjun Wang Junping Lin yanli Wang Guoliang chen State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China

The isothermal corrosion testing, microscopic examination and the performance of Fe3Si alloy as materials of construction for bath hardware in continuous hot-dipping lines were studied. The corrosion of Fe3Si alloy in molten zinc was controlled by attacking the grain boundaries preferentially. Aluminum reacted with iron of Fe3Si alloy firstly while the samples were immersed in molten zinc, although aluminum contents in the molten zinc were very low. The phase of reaction product was thought to be Fe2Al5. The corrosion rate of the Fe3Si alloy in molten zinc was determined to be approximately 2.9×10^-3 mm/h, therefore the liquid zinc corrosion resistance of Fe3Si alloy was very weak.

关键词： Fe3Si alloy liquid zinc corrosion galvanizing intermetallics

Classifying Galaxy Morphologies with Few-shot Learning

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Research in Astronomy and Astrophysics 2022年第5期22卷 9-20页

作者： Zhirui Zhang Zhiqiang Zou Nan Li yanli chen College of Computer Nanjing University of Posts and Telecommunications Nanjing 210023.China Jiangsu Key Laboratory of Big Data Security and Intelligent Processing Nanjing 210023China Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

The taxonomy of galaxy morphology is critical in astrophysics as the morphological properties are powerful tracers of galaxy *** the upcoming Large-scale Imaging Surveys,billions of galaxy images challenge astronomers to accomplish the classification task by applying traditional methods or human ***,machine learning,in particular supervised deep learning,has been widely employed to classify galaxy morphologies recently due to its exceptional automation,efficiency,and ***,supervised deep learning requires extensive training sets,which causes considerable workloads;also,the results are strongly dependent on the characteristics of training sets,which leads to biased outcomes *** this study,we attempt Few-shot Learning to bypass the two *** research adopts the data set from the Galaxy Zoo Challenge Project on Kaggle,and we divide it into five categories according to the corresponding truth *** classifying the above data set utilizing few-shot learning based on Siamese Networks and supervised deep learning based on AlexNet,VGG_16,and ResNet_50 trained with different volumes of training sets separately,we find that few-shot learning achieves the highest accuracy in most cases,and the most significant improvement is 21%compared to AlexNet when the training sets contain 1000 *** addition,to guarantee the accuracy is no less than 90%,few-shot learning needs~6300 images for training,while ResNet_50 requires~13,000 *** the advantages stated above,foreseeably,few-shot learning is suitable for the taxonomy of galaxy morphology and even for identifying rare astrophysical objects,despite limited training sets consisting of observational data only.

关键词： Galaxies-Galaxy morphological classification-Method neural networks

Functional characterization of the Arabidopsis SERRATE under salt stress

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Plant Diversity 2021年第1期43卷 71-77页

作者： Minghui Mou Qijuan Wang yanli chen Diqiu Yu Ligang chen CAS Key Laboratory of Tropical Plant Resources and Sustainable Use Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglunMenglaYunnan 666303China Center of Economic Botany Core Botanical GardensChinese Academy of SciencesMenglunMenglaYunnan 666303China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China

SERRATE(SE)plays critical roles in RNA metabolism and plant growth ***,its function in stresseresponse processes remains largely ***,we examined the regulatory role of SE using the se-1 mutant and its complementation line under saline *** expression of SE was repressed by salt treatment at both mRNA and protein *** treatment with different NaCl concentrations,the se-1 mutants showed increased sensitivity to *** heightened sensitivity was evidenced by decreased germination,reduced root growth,more serious chlorosis,and increased conductivity of the mutants compared with the wild *** analysis revealed that SE regulates the pre-mRNA splicing of several well-characterized marker genes associated with salt stress *** data thus imply that SE may function as a key component in plant response to salt stress by modulating the splicing of salt stress-associated genes.

关键词： SERRATE Salt stress Pre-mRNA alternative splicing

ERF1 delays flowering through direct inhibition of FLOWERING LOCUS T expression in Arabidopsis

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Journal of Integrative Plant Biology 2021年第10期63卷 1712-1723页

作者： yanli chen Liping Zhang Haiyan Zhang Ligang chen Diqiu Yu CAS Key Laboratory of Tropical Plant Resources and Sustainable Use Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Center of Economic Botany Core Botanical GardensChinese Academy of SciencesMenglunMengla 666303China State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan Yunnan UniversityKunming 650091China

ETHYLENE RESPONSE FACTOR1(ERF1)is a key component in ethylene signaling,playing crucial roles in both biotic and abiotic stress ***,we demonstrate that ERF1 also has an important role during floral initiation in Arabidopsis *** or knockout of ERF1 accelerated floral initiation,whereas overexpression of ERF1 dramatically delayed floral *** contrasting phenotypes were correlated with opposite transcript levels of FLOWERING LOCUS T(FT).Chromatin immunoprecipitation(ChIP)assays revealed that ERF1 associates with genomic regions of the FT gene to repress its ***-10/ERF1RNAi plants showed a similar flowering phenotype to the ft-10 mutant,whereas the flowering of FTox/ERF1ox mimicked that of FTox plants,suggesting that ERF1 acts upstream of FT during floral ***,altered floral transition in ethylene-related mutants was also correlated with FT *** analysis suggested that ERF1 also participates in delay in flowering-time control mediated by the ethylene precursor 1-aminocyclopropane-1-carboxylic ***,ERF1 may act as a negative modulator of flowering-time control by repressing FT transcription in Arabidopsis.

关键词： Arabidopsis thaliana ethylene ETHYLENE RESPONSE FACTOR1 floral initiation FLOWERING LOCUS T

Characteristic analysis of hydraulic hybrid vehicle based on limit cycle

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Science China(Technological Sciences) 2012年第4期55卷 1031-1036页

作者： chen yanli LIU ShunAn SHANG Tao ZHANG YuanKun College of Mechanical Science and Engineering Jilin UniversityChangchun 130022China Faculty of Engineering University of WollongongWollongong NSW 2522Australia

The theory of limit cycles was applied to hydraulic hybrid vehicle (HHV) to analyze the dynamic characteristics of the system. The exact mathematical models based on configuration diagram of HHV were built to study on equilibrium points, nonexistence of limit cycle and stability of equilibrium points. The analysis showed that if the Young's modulus of fluid is neglected, the equilibrium points of the system will be distributed on both sides of the initial function. In addition, there is a unique equilibrium point according to the practical signification of the system parameters. The nonexistence analysis showed that there is no limit cycle for the system, no matter how the viscosity coefficient B changes. The stability analysis of equilibrium points showed that the system is asymptotically stable about the equilibrium point at B≥0 and the equilibrium point is the center point of the system at B=0. Finally, the phase diagrams of global topological structure of HHV system were entirely described according to qualitative analysis of the singular points at infinity.

关键词： automotive engineering hydraulic hybrid vehicle limit cycle global structure

Multicolor Photoluminescence in ITQ-16 Zeolite Film

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Chemical Research in Chinese Universities 2016年第5期32卷 713-718页

作者： chen yanli DONG Xinglong ZHANG Zhenyu FENG Lai College of Physics Optoelectronics and Energy Soochow University Suzhou 215006 P. R. China School of Materials Science and Engineering Tianjin University of Technology Tianjin 300384 P. R. China Advanced Membrane and Porous Materials Center King Abdullah University of Science and Technology Thuwa123955-6900 Saudi Arabia State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun 130012 P. R. China

Exploring the native defects of zeolites is highly important for understanding the properties of zeolites, such as catalysis and optics. Here, ITQ-16 films were prepared via the secondary growth method in the presence of Ge atoms. Various intrinsic defects of ITQ-16 films were fully studied through photoluminescence and FTIR characterizations. It was found that both the as-synthesized and calcined ITQ-16 films displayed multicolor photolumines- cence including ultraviolet, blue, green and red emissions by exciting upon appropriate wavelengths. The results in- dicate that Si--OH and non-bridging oxygen hole centers（NBOHCs） are responsible for the origin of green and red emissions at 540--800 nm, while according to a variety of emission bands of calcined ITQ-16 film, blue emission bands at around 446 and 462 nm are attributed to peroxy free radicals（≡SiO2＊）, ultraviolet emissions ranging from 250 nm to 450 nm are suggested originating from a singlet-to-triplet transition of two-fold-coordinated Si and Ge, respectively.

关键词： Zeolite beta Film ITQ-16 Defect Photoluminescence

Magnetic-dielectric synergy and interfacial engineering to design yolk-shell structured CoNi@void@C and CoNi@void@C@MoS_(2) nanocomposites with tunable and strong wideband microwave absorption

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Nano Research 2022年第7期15卷 6761-6771页

作者： chen Li Xiaosi Qi Xiu Gong Qiong Peng yanli chen Ren Xie Wei Zhong College of Physics Guizhou Province Key Laboratory for Photoelectrics Technology and ApplicationGuizhou UniversityGuiyang 550025China National Laboratory of Solid State Microstructures and Jiangsu Provincial Laboratory for NanoTechnology Nanjing UniversityNanjing 210093China

In order to effectively utilize the magnetic-dielectric synergy and interfacial engineering,in this paper,yolk–shell structured magnetic multicomponent nanocomposites(MCNCs)including CoNi@void@C and CoNi@void@C@MoS_(2) were produced in large scale by in-situ pyrolysis of cubic CoNi Prussian blue analogs(PBAs)followed by the hydrothermal process,*** of their unique structures,excellent synergistic effect between dielectric and magnetic loss,the as-prepared CoNi@void@C and CoNi@void@C@MoS_(2) MCNCs displayed very outstanding electromagnetic wave absorption performances(EMWAPs)including strong absorption capabilities,broad absorption bandwidth and thin matching ***,the as-prepared CoNi@void@C and CoNi@void@C@MoS_(2) MCNCs well maintained the cubic configuration of CoNi PBAs even after the thermal treatment and hydrothermal *** unique structure and formed carbon layers effectively prevented the corrosion of internal CoNi alloy during the formation of MoS_(2),and CoNi@void@C@MoS_(2) MCNCs with different MoS_(2) contents could be synthesized by controlling the hydrothermal *** obtained results revealed that the EM parameters,dielectric and magnetic loss capabilities of CoNi@void@C@MoS_(2) MCNCs could be tuned by controlling hydrothermal temperature and filler loading,which made their outstanding EMWAPs could be achieved in different frequency *** account of simple process,low density and high chemical stability,our findings provided a new and effective pathway to develop the strong wideband microwave absorbers.

关键词： yolk-shell structure CoNi@void@C CoNi@void@C@MoS_(2) interface polarization strong wideband microwave absorbers

In-situ growth of ZnS/FeS heterojunctions on biomass-derived porous carbon for efficient oxygen reduction reaction

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Journal of Energy Chemistry 2020年第8期29卷 79-85,I0003页

作者： Rong Jiang Xin chen Jinxia Deng Tianyu Wang Kang Wang yanli chen Jianzhuang Jiang Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials Department of ChemistryUniversity of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina

It is an urgent task to develop highly efficient non-noble metal electrocatalysts in the direction of ORR,but still a huge and long-term ***,an efficient one-step pyrolysis of Sichuan pepper powder,2,2-bipyridine,FeCl3,Na SCN,and ZnCl2 at 900℃ provides the FeS/ZnS@N,S-C-900 hybrid *** electron microscopy(TEM)images and Mott-Schottky curves clearly reveal the in-situ constructed abundant FeS/ZnS-based p-n junctions dispersed on the biomass-derived porous carbon surface of FeS/ZnS@N,*** as-prepared FeS/ZnS@N,S-C-900 hybrid exhibits superior ORR performance in comparison with Pt/C in 0.1 M KOH with high onset(Eonset)and half-wave potentials(E1/2)of 1.00 and 0.880 V ***,large limiting current density(JL)of 5.60 mA cm-2,and robust durability and methanol ***,upon the light irradiation,FeS/ZnS@N,S-C-900 produces a photocurrent as high as ca.0.3μA cm-2,resulting in further improvement over Eonset,E1/2,and JLof FeS/ZnS@N,S-C-900 to1.10 V ***,0.885 V ***,and 6.02 mA *** in combination with theoretical calculations demonstrate the significant effect of FeS/ZnS heterojunction on the enhanced ORR catalytic activity of FeS/ZnS@N,*** work is useful for the development of advanced heterojunction-based ORR catalysts for various energy conversion devices.

关键词： Heterojunction Oxygen reduction reaction Photo-responsive electrocatalyst Biomass-derived carbon