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DPPS: A novel dual privacy-preserving scheme for enhancing query privacy in continuous location-based services

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Frontiers of Computer Science 2023年第5期17卷 197-205页

作者： Long LI jianbo HUANG Liang CHANG Jian WENG Jia CHEN Jingjing LI College of Cyber Security Jinan UniversityGuangzhou 510632China Guangxi Key Laboratory of Trusted Software Guilin University of Electronic TechnologyGuilin 541004China Department of Computer Applications Guilin University of Technology at NanningNanning 530000China

Since smartphones embedded with positioning systems and digital maps are widely used,location-based services(LBSs)are rapidly growing in popularity and providing unprecedented convenience in people’s daily lives;however,they also cause great concern about privacy leakage.In particular,location queries can be used to infer users’sensitive private information,such as home addresses,places of work and appointment locations.Hence,many schemes providing query anonymity have been proposed,but they typically ignore the fact that an adversary can infer real locations from the correlations between consecutive locations in a continuous LBS.To address this challenge,a novel dual privacy-preserving scheme(DPPS)is proposed that includes two privacy protection mechanisms.First,to prevent privacy disclosure caused by correlations between locations,a correlation model is proposed based on a hidden Markov model(HMM)to simulate users’mobility and the adversary’s prediction probability.Second,to provide query probability anonymity of each single location,an advanced k-anonymity algorithm is proposed to construct cloaking regions,in which realistic and indistinguishable dummy locations are generated.To validate the effectiveness and efficiency of DPPS,theoretical analysis and experimental verification are further performed on a real-life dataset published by Microsoft,i.e.,GeoLife dataset.

关键词： location-based services privacy-preserving hidden Markov model k-anonymity query probability

Multi-attribute group decision-making method with linguistic q-rung orthopair fuzzy information based on bi-direction Choquet integral

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International Journal of Intelligent Computing and Cybernetics 2023年第2期16卷 341-363页

作者： Ling weng jian Lin Shujie Lv School of Computer and Information Science Fujian Agriculture and Forestry UniversityFuzhouChina

Purpose-The purpose of this paper is to develop the linguistic q-rung orthopair fuzzy set(LqROFS)information VIKOR method based on the bi-direction Choquet integral(BDCI),taking into account the correlation between information.The method can enrich the existing studies related to LqROFS information and better solve the problem of MAGDM problem.Design/methodology/approach-Since applying Choquet integral(CI)depict information interaction is a common operation in MAGDM.However,the traditional CI has some limitations.The unidirectional alignment may affect the MAGDM results.Therefore,a LqROFS-VIKOR method based on BDCI is proposed,where BDCI is used to aggregate the decision matrix.Furthermore,it is not reasonable to apply exact numbers to express the similarity between two qualitative data.Then a new method of defining similarity using linguistics is proposed.The similarity is used to calculate attribute weights.Findings-The validity and potential application of MAGMD method with linguistic q-rung orthopair fuzzy information based on BDCI are demonstrated in a numerical examples study.Originality/value-According to the study of available literature,the current research on LqROFS is incomplete.The existing studies of both similarity and aggregate operators have certain shortcomings.The definition of similarity proposed in this paper is more in line with reality.And compared with the existing methods,the BDCI-based aggregate operator can describe the interaction between information more reasonably.Based on this VIKOR method based on BDCI under the LqROFS environment can better select the alternative.

关键词： Linguistic q-rung orthopair fuzzy set Similarity measure Bi-direction choquet integral VIKOR method

Lattice-based autonomous path proxy re-encryption in the standard model

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Science China(Information Sciences) 2023年第10期66卷 184-195页

作者： Wenli XIE Jian WENG Yao TONG Xiaojian LIANG Lisha YAO Feixiang ZHAO College of Cyber Security Jinan University Guangzhou Fongwell Data Limited Company

Autonomous path proxy re-encryption(AP-PRE) is a type of PRE that implements control on the delegation path in a multi-hop PRE. AP-PRE forces the proxy to perform the transformation along a predefined path without revealing the underlying plaintext. There are several applications of AP-PRE,including electronic medical systems, data sharing, and email systems. However, as far as we know, the existing AP-PRE scheme is provably secure in the random oracle model under the classical number-theoretic assumption, which might be vulnerable to quantum computers. Therefore, it raises the intriguing question of how to construct a quantum-resistant AP-PRE scheme. In this study, we proposed an AP-PRE scheme based on the widely accepted quantum-resistant learning with errors(LWE) assumptions. Our scheme supports the polynomial length of the delegation path. Furthermore, our scheme is proved to be selective-path CPA(sCPA) secure in the standard model under LWE assumptions.

关键词： autonomous path proxy re-encryption proxy re-encryption lattice-based cryptography learning with errors controlled delegation

General construction of revocable identity-based fully homomorphic signature

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Science China(Information Sciences) 2020年第3期63卷 266-271页

作者： Congge XIE Jian WENG Wei LU Lin HOU College of Information Science and Technology Jinan University School of Data and Computer Science Sun Yat-sen University

Dear editor,Fully homomorphic signature (FHS) is a cryptographic primitive and allows anyone to conduct any computations over signatures and generate a signature which, when verified, matches the calculated value of the computational run on the messages. An identity-based fully homomorphic signature (IBFHS) extended from an FHS can avoid

关键词： General construction of revocable identity-based fully homomorphic signature

Temporal changes in the spinal cord transcriptome after peripheral nerve injury

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Neural Regeneration Research 2020年第7期15卷 1360-1367页

作者： Jian WENG Dong-Dong Li Bao-Guo jiang Xiao-Feng Yin Department of Orthopedics and Trauma Peking University People's HospitalBeijingChina Department of Bone&Joint Surgery Peking University Shenzhen HospitalShenzhenGuangdong ProvinceChina Department of Surgery the 517th Hospital of the People's Liberation ArmyXinzhouShanxi ProvinceChina

Peripheral nerve injury may trigger changes in mRNA levels in the spinal cord.Finding key mRNAs is important for improving repair after nerve injury.This study aimed to investigate changes in mRNAs in the spinal cord following sciatic nerve injury by transcriptomic analysis.The left sciatic nerve denervation model was established in C57 BL/6 mice.The left L4–6 spinal cord segment was obtained at 0,1,2,4 and 8 weeks after severing the sciatic nerve.mRNA expression profiles were generated by RNA sequencing.The sequencing results of spinal cord mRNA at 1,2,4,and 8 weeks after severing the sciatic nerve were compared with those at 0 weeks by bioinformatic analysis.We identified 1915 differentially expressed mRNAs in the spinal cord,of which 4,1909,and 2 were differentially expressed at 1,4,and 8 weeks after sciatic nerve injury,respectively.Sequencing results indicated that the number of differentially expressed mRNAs in the spinal cord was highest at 4 weeks after sciatic nerve injury.These mRNAs were associated with the cellular response to lipid,ATP metabolism,energy coupled proton transmembrane transport,nuclear transcription factor complex,vacuolar proton-transporting V-type ATPase complex,inner mitochondrial membrane protein complex,tau protein binding,NADH dehydrogenase activity and hydrogen ion transmembrane transporter activity.Of these mRNAs,Sgk1,Neurturin and Gpnmb took part in cell growth and development.Pathway analysis showed that these mRNAs were mainly involved in aldosterone-regulated sodium reabsorption,oxidative phosphorylation and collecting duct acid secretion.Functional assessment indicated that these mRNAs were associated with inflammation and cell morphology development.Our findings show that the number and type of spinal cord mRNAs involved in changes at different time points after peripheral nerve injury were different.The number of differentially expressed mRNAs in the spinal cord was highest at 4 weeks after sciatic nerve injury.These results provide reference data for finding new targets

关键词： deep sequencing expression profile gene therapy mRNAs nerve regeneration peripheral nerve injury RNA sequencing sciatic nerve injury spinal cord transcriptome

Three-dimensional temperature prediction in cylindrical turning with large-chamfer insert based on a modified slip-line field approach

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Chinese Journal of Aeronautics 2021年第10期34卷 265-281页

作者： Cheng HU Kejia ZHUANG Yuanwei TANG Jian WENG Xiaoming ZHANG Han DING Hubei Digital Manufacturing Key Laboratory School of Mechanical and Electronic EngineeringWuhan University of TechnologyWuhan 430070China Institute of Advanced Materials and Manufacturing Technology Wuhan University of TechnologyWuhan 430070China AECC Guizhou Liyang Aviation Power CO.LTD Guiyang 550000China State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

Chamfered inserts have found broader applications in metal cutting process especially in high-performance machining of hard-to-cut materials for their excellent edge resistance and cutting toughness.However,excessive heat generation and resulting high cutting temperature eventually cause severe tool wear and poor surface integrity,which simultaneously limits the optimal selection of machining parameters.In the present study,an analytical thermal–mechanical model is proposed for the prediction of the three-dimensional(3-D)temperature field in cylindrical turning with chamfered round insert based on a modified slip-line field approach.First,an innovative discretization method is introduced in a general 3-D coordinate system to provide a comprehensive demonstration of the irregular cutting geometry and heat generation zones.Then,a plasticity-theory-based slip-line field model is developed and employed to determine the intensities and geometries of every elementary heat sources in Primary Deformation Zones(PDZ),Secondary Deformation Zones(SDZ)and Dead Metal Zones(DMZ).At last,a 3-D analytical model is suggested to calculate the temperature increases caused by the entire heat sources and associated images.The maximum cutting temperature region predicted is found existing upon the chip-tool contact area rather than the tool edge.Moreover,the rationalities of cutting parameters employed are analyzed along with theoretical material removal rates and ensuing maximum cutting temperatures.The results indicate that the cutting conditions with large depth of cut and high cutting speed are more desirable than those with high feed rates.The proposed models are respectively verified through a series of 3-D Finite Element(FE)simulations and dry cutting experiments of Inconel 718 with chamfered round insert.Satisfactory agreement has been reached between the predictions and simulations as well as the measurements,which confirms the correctness and effectiveness of the presented analytical model.

关键词： Analytical model Chamfered round insert Dead metal zone Prediction of temperature Slip-line field

Reduced Ti-MOFs encapsulated black phosphorus with high stability and enhanced photocatalytic activity

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Journal of Energy Chemistry 2021年第2期30卷 185-191,I0007页

作者： Xiao Liu Peijie Fan Liangping Xiao Jian WENG Qingchi Xu Jun Xu Department of Biomaterials College of Materials.Xiamen UniversityXiamen 361005Fujian.China Department of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional MaterialsXiamen UniversityXiamen 361005FujianChina Shenzhen Research Institute of Xiamen University.Shenzhen 518057 GuangdongChina China State Key Lab of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina

The generation of green hydrogen(H_2) energy is of great significance to solve worldwide energy and environmental issues. Reduced Ti based photocatalyst has recently attracted intensive attention due to its excellent photocatalytic activity, while the synthesis of reduced Ti based photocatalysts with high stability is still a great challenge. Here, we report a facile method for synthesis of reduced Ti metal organic frameworks(small amounts of Pt incorporated) encapsulated BP(BP/R-Ti-MOFs/Pt) hybrid nanomaterial with enhanced photocatalytic activity. The strong interaction between Ti and P reduces the valence state of the binding Ti^(4+)on the BP surface, forming abundant reduced Ti^(4+)within R-Ti-MOFs/BP. Such reduced Ti^(4+)render R-Ti-MOFs/BP efficient charge transfer and excellent light absorption capability, thus promote the photocatalytic H_2 production efficiency. Furthermore, the Ti-P interaction stabilizes both reduced Ti^(4+)and BP during the photocatalytic reaction, which greatly enhanced the stability of the obtained BP/R-TiMOFs/Pt photocatalyst.

关键词： 2D materials Reduced Ti-MOFs Black phosphorus Photocatalysis Solar-to-hydrogen conversion Metal-organic frameworks

MAFLD vs.NAFLD:shared features and potential changes in epidemiology,pathophysiology,diagnosis,and pharmacotherapy

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Chinese Medical Journal 2021年第1期134卷 8-19页

作者： Ying-Xin Xian jian-Ping weng Fen Xu Department of Endocrinology and Metabolism The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong 510630China Guangdong Provincial Key Laboratory of Diabetology GuangzhouGuangdong 510630China Department of Endocrinology of the First Affiliated Hospital Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui 230001China

Nonalcoholic fatty liver disease(NAFLD)is the most common chronic liver disease worldwide,placing an increasing burden on human health.NAFLD is a complex multifactorial disease involving genetic,metabolic,and environmental factors.It is closely associated with metabolic syndrome,obesity,and type 2 diabetes,of which insulin resistance is the main pathophysiological mechanism.Over the past few decades,investigation of the pathogenesis,diagnosis,and treatments has revealed different aspects of NAFLD,challenging the accuracy of definition and therapeutic strategy for the clinical practice.Recently,experts reach a consensus that NAFLD does not reflect the current knowledge,and metabolic(dysfunction)associated fatty liver disease(MAFLD)is suggested as a more appropriate term.The new definition puts increased emphasis on the important role of metabolic dysfunction in it.Herein,the shared features and potential changes in epidemiology,pathophysiology,diagnosis,and pharmacotherapy of the newly defined MAFLD,as compared with the formerly defined NAFLD,are reviewed for updating our understanding.

关键词： Nonalcoholic fatty liver disease Metabolic(dysfunction)associated fatty liver disease Epidemiology Pathophysiology Diagnosis Pharmacotherapy

Fully distributed certificateless threshold signature without random oracles

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Science China(Information Sciences) 2018年第9期61卷 259-269页

作者： Wenjie YANG Weiqi LUO Xizhao LUO Jian WENG Anjia YANG College of Cyber Security/College of Information Science and Technology Jinan University Guangdong Key Laboratory of Data Security and Privacy Preserving Guangzhou Key Laboratory of Data Security and Privacy Preserving School of Computer and Technology Soochow University

A certificateless(t,n)threshold signature(CLTS)scheme allows at least t members to cooperatively sign a message on behalf of an n-member group,which is a good way to share the responsibility and authority.Many researc... 详细信息

关键词： Fully distributed certificateless threshold signature without random oracles PKR Si DKG CLS