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An enhanced searchable encryption scheme for secure data outsourcing

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Science China(Information Sciences) 2020年第3期63卷 120-139页

作者： rui ZHANG Jiabei WANG Zishuai song Xi WANG State Key Laboratory of Information Security (SKLOIS) Institute of Information EngineeringChinese Academy of Sciences School of Cyber Security University of Chinese Academy of Sciences

In the cloud environment, where the cloud server cannot always be fully trusted, both data and query privacy should be well protected for secure data outsourcing. Searchable encryption provides a more practical solution to secure data storage while enabling efficient search queries. In this paper, four important problems of public key encryption with keyword search(PEKS), namely, a scheme without secure channels,conjunctive keyword search,(offline) outside and inside keyword guessing attack(full KGA) resistance and proof in the standard model, are considered. We provide an in-depth analysis of the reasons behind(offline)full KGA by considering two types of PEKS schemes as examples. In particular, we introduce the concept of server-aided secure channel free public key encryption with conjunctive keyword search(SA-SCF-PECKS)which can resist(offline) full KGA. Furthermore, we provide a concrete and efficient construction of SA-SCFPECKS, and prove its security in the standard model. To the best of our knowledge, our proposal is the first PECKS scheme to address these four problems simultaneously. We compare the security and efficiency of our scheme with those of other related PECKS schemes in theoretical and practical ways. In general,compared with other schemes, our SA-SCF-PECKS scheme shows better performance in terms of security and efficiency.

关键词： secure data outsourcing (offline) outside and inside keyword guessing attack secure channel free PEKS conjunctive keyword search server-aided scheme standard model

A Review and Prospects on Collaborative Ontology Editing Tools

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Journal of Integrative Agriculture 2012年第5期11卷 731-740页

作者： XIAN Guo-jian ZHAO rui-xue Agricultural Information Institution Chinese Academy of Agricultural SciencesBeijing 10008lPR.China

Building ontology is a fundamental but also hard work. Collaborative ontology editing tools can make ontology development more efficiently. In this paper, the important features of collaborative ontology development were analyzed, and several tools such as AGROVOC Concept Server Workbench （ACSW）, Collaborative Prot6g6 and WebProt6g6 were studied. Besides, some comparisons among them from several aspects were made and some prospects for the further improvement of these tools were given. Finally, we show it is a good way to build agricultural ontology with these tools collaboratively and simultaneously.

关键词： collaborative ontology editing agricultural ontology ACSW Collaborative Prot6g6 WebProt6g6

Image Compression Based on LSS Algorithm

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Journal of Systems Engineering and Electronics 2000年第4期11卷 59-65页

作者： rui Guosheng Kang jian Quan Taifan Naval Aeronautical Engineering Academy Yantai 264001 P. R. China

Lifting scheme is a second-generation wavelet transform which is easier to understand than the first-generation wavelet transform. Fourier analysis is not necessary for the construction, and inverse transform can naturally be realized. Furthermore, it is faster than the first-generation wavelet transform. In terms of compression ratio and compression efficiency, SPIHT is the best algorithm based on EZW, but its theory is difficult to understand and come true. We carry out the SPIHT algorithm, and propose a reformed algorithm based on SPIHT, making the realization more easier. In the end, LSS algorithm composed of lifting scheme and SPIHT algorithm is presented, whose compression efficiency is the same as SPIHT, but running is 10% faster than SPIHT.

关键词： Algorithms Fourier transforms Trees (mathematics) Wavelet transforms

Periodic boundary value problem for the first order functional differential equations with impulses

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Applied Mathematics(A Journal of Chinese Universities) 2009年第1期24卷 27-35页

作者： LIANG rui-xi SHEN jian-hua Dept. of Math. Hunan Normal Univ. Hunan 410081 China Dept. of Math. Huaihua College Hunan 418008 China

This paper is concerned with the existence and approximation of solutions for a class of first order impulsive functional differential equations with periodic boundary value conditions. A new comparison result is pres... 详细信息

关键词： functional differential equation periodic boundary value problem lower and upper solution monotone iterative method

Isometries and Additive Mapping on the Unit Spheres of Normed Spaces

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Acta Mathematica Sinica,English Series 2017年第10期33卷 1431-1442页

作者： rui Dong WANG Xu jian HUANG Science of College Tianjin University of Technology Tianjin 300384 P. R. China

In this paper, we investigate isometric extension problem in general normed space. We prove that an isometry between spheres can be extended to a linear isometry between the spaces if and only if the natural positive homogeneous extension is additive on spheres. Moreover, this conclusion still holds provided that the additivity holds on a restricted domain of spheres.

关键词： Isometric extension additive mapping unit sphere angle

Optimization of Ethylene Glycol Doped PEDOT:PSS Transparent Electrodes for Flexible Organic Solar Cells by Drop-coating Method

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Chinese Journal of Polymer Science 2019年第8期37卷 760-766页

作者： Hui-Qin Cui rui-Xiang Peng Wei song jian-Feng Zhang Jia-Ming Huang Li-Qiang Zhu Zi-Yi Ge Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo 315211 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China

Fabrication of flexible transparent electrodes(FTEs) is one of the core technologies in the field of flexible electronics. Among multiple choices of FTEs, poly(3,4-ethylenedioxythiophene):poly(styrene-sulfonic acid)(PEDOT:PSS) has shown its promising application in roll-to-roll manufacturing. A simple yet effective method for substantially boosting the conductivity of these conducting polymer films without causing large-domain aggregations is by adding ethylene glycol(EG) as dopant. Herein, we investigated in detail the effects of the secondary solvent of ethylene glycol(EG) on the optical and electrical characteristics of PEDOT:PSS films. The modified PEDOT:PSS FTEs were deposited using drop-coating techniques as it had greater compatibility for large-area samples than the conventional spin-coating method did. The 6% EG-doped PEDOT:PSS FTE via drop-coating method achieved a high figure of merit(FoM) value of 47.24 and the devices fabricated using the optimal PEDOT:PSS FTE yielded a high power conversion efficiency(PCE) of 8.89%, mostly attributed to the modified PEDOT:PSS films that had excellent optical and electrical characteristics with low surface roughness. These results suggested that EG-doping could effectively boost the conductivity of PEDOT:PSS films and that the modified PEDOT:PSS FTE is suitable for roll-to-roll manufacturing in the future.

关键词： PEDOT:PSS Doping Conductivity Flexible transparent electrodes Organic solar cells

Hierarchical Canonical Correlation Analysis Reveals Phenotype,Genotype,and Geoclimate Associations in Plants

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Plant Phenomics 2020年第1期2卷 57-72页

作者： Raphael Petegrosso Tianci song rui Kuang Department of Computer Science and Engineering University of Minnesota Twin CitiesMinneapolisMNUSA

The local environment of the geographical origin of plants shaped their genetic variations through environmental *** the characteristics of the local environment correlate with the genotypes and other genomic features of the plants,they can also be indicative of genotype-phenotype associations providing additional information relevant to environmental *** this study,we investigate how the geoclimatic features from the geographical origin of the Arabidopsis thaliana accessions can be integrated with genomic features for phenotype prediction and association analysis using advanced canonical correlation analysis(CCA).In particular,we propose a novel method called hierarchical canonical correlation analysis(HCCA)to combine mutations,gene expressions,and DNA methylations with geoclimatic features for informative coprojections of the *** uses a condition number of the cross-covariance between pairs of datasets to infer a hierarchical structure for applying CCA to combine the *** the experiments on Arabidopsis thaliana data from 1001 Genomes and 1001 Epigenomes projects and climatic,atmospheric,and soil environmental variables combined by CLIMtools,HCCA provided a joint representation of the genomic data and geoclimate data for better prediction of the special flowering time at 10°C(FT10)of Arabidopsis *** also extended HCCA with information from a protein-protein interaction(PPI)network to guide the feature learning by imposing network modules onto the genomic features,which are shown to be useful for identifying genes with more coherent functions correlated with the geoclimatic *** findings in this study suggest that environmental data comprise an important component in plant phenotype *** is a useful data integration technique for phenotype prediction,and a better understanding of the interactions between gene functions and environment as more useful functional information is introduced by coprojections of

关键词： climatic prediction hierarchical

Size distribution of inclusions in 12%Cr stainless steel with a wide range of solidification cooling rates

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International Journal of Minerals,Metallurgy and Materials 2015年第11期22卷 1157-1162页

作者： Han-song Yu jian-guo Li School of Materials Science and Engineering Shanghai Jiao Tong University

The effect of solidification cooling rate on the size and distribution of inclusions in 12%Cr stainless steel was investigated. A wide range of solidification cooling rates（from 0.05 to 106 K·s^-1） was achieved using various solidification processes, including conventional casting, laser remelting, and melt spinning. The size and distribution of inclusions in the steel were observed and statistically collected. For comparison, mathematical models were used to calculate the sizes of inclusions at different solidification cooling rates. Both the statistical size determined from observations and that predicted from calculations tended to decrease with increasing cooling rate; however, the experimental and calculated results did not agree well with each other at excessively high or low cooling rate. The reasons for this discrepancy were theoretically analyzed. For the size distribution of inclusions, the effect of cooling rate on the number densities of large-sized（〉 2 μm） inclusions and small-sized（≤ 2 μm） inclusions were distinct. The number density of inclusions larger than 1 μm was not affected when the cooing rate was less than or equal to 6 K·s^-1 because inclusion precipitation was suppressed by the increased cooling rate.

关键词： solidification cooling rate inclusions size distribution number density stainless steels

Fatigue life prediction model of 2.5D woven composites at various temperatures

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Chinese Journal of Aeronautics 2018年第2期31卷 310-329页

作者： jian song Weidong WEN Haitao CUI College of Energy and Power Engineering Nanjing University of Aeronautics and Astronautics Department of Mechanical and Biomedical Engineering City University of Hong Kong

As one of the new structural layout in the family of woven composites, 2.5D Woven Composites（2.5D-WC） have recently attracted an increasing interest owing to its excellent properties, i.e. high specific strength and fatigue resistance, in the aerospace and automobile industry. Indepth understanding of the fatigue behavior of this material at un-ambient temperatures is critical for the engineering applications, especially in aero-engine field. Here, fatigue behavior of 2.5D-WC at different temperatures was numerically investigated based on the unit cell approach. Firstly, the unit cell model of 2.5D-WC was established using ANSYS software. Subsequently, the temperature-dependent fatigue life prediction model was built up. Finally, the fatigue lives alongside the damage evolution processes of 2.5D-WC at ambient temperature（20 ℃） and unambient temperature（180 ℃） were analyzed. The results show that numerical results are in good agreement with the relevant experimental results at 20 and 180 ℃. Fatigue behavior of 2.5D-WC is also sensitive to temperature, which is partially attributed to the mechanical properties of resin and the change of inclination angle of warp yarns. We hope that the proposed fatigue life prediction model and the findings could further promote the engineering application of 2.5D-WC, especially in aero-engine field.

关键词： ANSYS Fatigue behavior Fatigue life prediction model Temperature 2.5D woven composites