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Distributed Oblivious Function Evaluation and Its Applications

Journal of Computer Science & Technology 2004年第6期19卷 942-947页

作者： Hong-DaLi XiongYang Deng-GuoFeng baoli StateKeyLabofInformationSecurity GraduateSchoolofChineseAcademyofSciencesBeijing100039P.R.China CollegeofEconomyandTrade SouthChinaUniversityofTropicalAgricultureSanya571737P.R.China

This paper is about distributed oblivious function evaluation (DOFE). In this setting one party (Alice) has a functionf(x), and the other party (Bob) with an input α wants to learnf(α) in an oblivious way with the help of a set of servers. What Alice should do is to share her secret functionf(x) among the servers. Bob obtains what he should get by interacting with the servers. This paper proposes the model and security requirements for DOFE and analyzes three distributed oblivious polynomial evaluation protocols presented in the paper. Keywords oblivious function evaluation - oblivious polynomial evaluation - secure multiparty computation - distributed - information security The research is supported by the National Basic Research 973 Program of China under Grant No. 1999035802 and the National Natural Science Foundation of China under Grant No.60273029.Hong-Da Li was born in 1960. He received the Ph.D. degree from Northwestern Polytechnical University in 2001. His current research interests are cryptology and cryptographic protocol.Xiong Yang received the B.S. degree in mathematics from Yan'an University, China, in 1984. He is an associate professor in College of Economy and Trade at South China University of Tropical Agriculture. His research interest is information security.Deng-Guo Feng was born in 1963. He is now a Ph.D. supervisor. His research interests focus on information security.Bao Li was born in 1965. He received the Ph.D. degree in cryptography in 1995 from Xidian University. His research interests include cryptographic protocols and public key cryptosystems.

关键词： oblivious function evaluation oblivious polynomial evaluation secure multiparty computation distributed information security

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Human gut microbiome: the second genome of human body

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Protein & Cell 2010年第8期1卷 718-725页

作者： baoli Zhu Xin Wang Lanjuan Li CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China Institute of Plant Protection and Microbiology Zhejiang Academy of Agricultural SciencesHangzhou 310021China State Key Laboratory for Diagnosis and Treatment of Infectious Diseases the First Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhou 310003China

The human body is actually a super-organism that is composed of 10 times more microbial cells than our body *** study of the human microbiome has demonstrated that there are 3.3 million unique genes in human gut,150 times more genes than our own genome,and the bacterial diversity analysis showed that about 1000 bacterial species are living in our gut and a majority of them belongs to the divisions of Firmicutes and *** addition,most people share a core microbiota that comprises 50–100 bacterial species when the frequency of abundance at phylotype level is not considered,and a core microbiome harboring more than 6000 functional gene groups is present in the majority of human gut surveyed till *** bacteria are not only critical for regulating gut metabolism,but also important for host immune system as revealed by animal studies.

关键词： metabolism harbor gut

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Global asymptotic tracking of asymmetrical underactuated surface vessels with parameter uncertainties

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控制理论与应用（英文版） 2013年第4期11卷 608-614页

作者： Wenjing XIE Hailing SUN baoli MA School of Automation Science and Electrical Engineering Beihang University

In this work, we investigate the tracking control problem of asymmetrical underactuated surface vessels with parameter uncertainties. The tracking error model is first derived via appropriate coordinate transformations, and is considered as a cascade structure composed of two subsystems. The Lyapunov redesign approach is employed to construct the control laws separately to stabilize the two subsystems with unknown model parameters. The cascade system theory is applied to prove the global uniform asymptotic convergence of the state trajectory to the reference one provided the desired yaw velocity is not vanishing. The effectiveness of the proposed control laws is verified by simulation examples.

关键词： Asymmetrical underactuated surface vessels Trajectory tracking Parameter uncertainties Lyapunovredesign

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Effects of source facies and maturity on individual carbon isotopic compositions of oil

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Geoscience Frontiers 2024年第5期15卷 210-221页

作者： Jingkun Zhang Jian Cao baoli Xiang State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China MOE Key Laboratory of Surficial Geochemistry School of Earth Sciences and EngineeringNanjing UniversityNanjing 210023China Research Institute of Experiment and Testing PetroChina Xinjiang Oilfield CompanyKaramayXinjiang 834000China

Carbon isotopes have been used extensively in tracing the sources of ***,primary source facies and secondary alteration controls on oil isotopic compositions have not been well resolved,resulting in application uncertainties.A case study was undertaken for an alkaline lacustrine oil system in a lower Permian formation in the Junggar Basin,NW *** indicate that increasing maturity causes the carbon isotopic composition to become heavier for only short–middle-chain compounds,whereas source facies-related carbon assimilation controls the compositions of short-,middle-,and long-chain *** particular,light-carbon assimilation during organic-matter degradation makes the isotopic composition lighter,whereas heavy carbon from the water mass makes it ***,oils in this study area were divided into Type U and Type N oils based on individual compound carbon isotopic compositions,reflecting the difference in source facies in a highly saline and reducing stratified water *** results provide a better understanding of the controls on carbon isotopes in oil in sedimentary basins,reducing the uncertainty in oil–source correlation and addressing the origin of oil.

关键词： Carbon assimilation Water stratification Carbon isotopes Alkaline lacustrine Junggar Basin

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Temporal and spatial characteristics of dissolved organic carbon in the Wujiang River,Southwest China

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Acta Geochimica 2017年第4期36卷 598-604页

作者： Xi Peng baoli Wang Yanchuang Zhao State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550002China Institute of Surface-Earth System Science Tianjin UniversityTianjin 300072China Key Laboratory of Digital Earth Science Institute of RemoteSensing and Digital EarthChinese Academy of SciencesBeijing 100094China

River systems play an important role in the global carbon cycle. Rivers transport carbon to the ocean and also affect the carbon cycle in the coastal ocean. The flux from land to the ocean is thought to be a very important part of the land carbon budget. To investigate the effect of dam-building on dissolved organic carbon(DOC)in rivers, three reservoirs of different trophic states in the Wujiang basin, Guizhou Province, were sampled twice per month between May 2011 and May 2012. Temporal and spatial distributions of DOC in the reservoirs and their released waters were studied. It was found that different factors controlled DOC in river water, reservoir water, and released water. DOC in the rivers tended to be affected by primary production. For reservoirs, the main controlling factors of DOC concentration varied by trophic state. For the mesotrophic Hongjiadu Reservoir, the effect of primary production on DOC concentration was obvious. For the eutrophic Dongfengdu Reservoir and the hypereutrophic Wujiangdu Reservoir, primary production was not significant and DOC came instead from soil and plant litter.

关键词： Carbon cycle Dissolved organic carbon Dam-building effect The Wujiang River

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Wire Arc Additive Manufactured CuMn_(13)Al_(7)High-Manganese Aluminium Bronze

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Chinese Journal of Mechanical Engineering 2022年第5期35卷 382-392页

作者： Chun Guo Baisong Hu baoli Wei Feng Chen College of Mechanical Engineering Anhui Science and Technology UniversityBengbu 233000China

In this work,high-manganese aluminium bronze CuMn_(13)Al_(7)samples were prepared by arc additive manufacturing *** phase composition,microstructure,and crystal structure of the high-manganese aluminium bronze CuMn_(13)Al_(7)arc additive manufactured samples were analysed using direct-reading spectrometer,metallographic microscope,scanning electron microscope,and transmission electron *** micro-hardness tester,tensile tester,impact tester,and electrochemical workstation were also used to test the performance of the CuMn_(13)Al_(7)*** studying the microstructure and properties of the CuMn_(13)Al_(7)samples,it was found that preparation of the samples by the arc additive manufacturing technology ensured good forming quality,almost no defects,and good metallurgical bonding inside the *** metallographic structure(α+β+point phase)mainly comprises the following:the metallographic structure in the equiaxed grain region has an obvious grain boundaryα;the metallographic structure in the remelting region has no obvious grain boundaryα;the thermal influence on the metallographic structure produced a weaker grain boundaryαthan the equiaxed grain *** transverse and longitudinal cross sections of the sample had uniform microhardness distributions,and the average microhardness values were 190.5 HV0.1 and 192.7 HV0.1,*** sample also had excellent mechanical properties:yield strength of 301 MPa,tensile strength of 633 MPa,elongation of 43.5%,reduction of area by 58%,Charpy impact value of 68 J/cm^(2)at–20℃,and dynamic potential polarisation curve test ***,it was shown that the average corrosion potential of the sample was–284.5 mV,and the average corrosion current density was 4.1×10–3 mA/cm^(2).

关键词： CuMn_(13)Al_(7) High-manganese aluminium bronze Wire arc additive manufacturing Microstructure Mechanical properties

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Oblivious Polynomial Evaluation

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Journal of Computer Science & Technology 2004年第4期19卷 550-554页

作者： Hong-DaLi Dong-YaoJi Deng-GuoFeng baoli StateKeyLabofInformationSecurity GraduateSchoolofChineseAcademyofSciencesBeijing100039P.R.China

The problem of two-party oblivious polynomial evaluation (OPE) is studied, where one party (Alice) has a polynomial P(x) and the other party (Bob) with an input x wants to learn P(x) in such an oblivious way that Bob obtains P(x) without learning any additional information about P except what is implied by P(x) and Alice does not know Bob's input x. The former OPE protocols are based on an intractability assumption except for OT protocols. In fact, evaluating P(x) is equivalent to computing the product of the coefficient vectors (a(0),...,a(n)) and (1,...,x(n)). Using this idea, an efficient scale product protocol of two vectors is proposed first and then two OPE protocols are presented which do not need any other cryptographic assumption except for OT protocol. Compared with the existing OPE protocol, another characteristic of the proposed protocols is the degree of the polynomial is private. Another OPE protocol works in case of existence of untrusted third party. Keywords oblivious polynomial evaluation, oblivious transfer, secure multi-party computation, information.

关键词： oblivious polynomial evaluation oblivious transfer secure multi-party computation information security

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Diffusive representation of Riemann-Liouville fractional integrals and derivatives 36

Diffusive representation of Riemann-Liouville fractional int...

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第36届中国控制会议

作者： Yuxiang Guo baoli Ma The Seventh Research Division Beijing University of Aeronautics and Astronautics

ISBN: (纸本)9781538629185

This paper presents a novel equivalent description of fractional-order integrals and derivatives via an auxiliary integral function of two *** the concept of Laguerre integration,a novel approximate scheme for the resulting infinite dimensional state space model is derived.A simple example with numerical simulations is provided to show the superiority and effectiveness of the proposed method in comparison with some related works from the previous results.

关键词： Riemann-Liouville integral Riemann-Liouville derivative fractional-order system Mittag-Leffler function Laguerre integration

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Isolation and characterization of atrazine-degrading Arthrobacter sp. AD26 and use of this strain in bioremediation of contaminated soil

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Journal of Environmental Sciences 2008年第10期20卷 1226-1230页

作者： Li Qingyan Li Ying Zhu Xikun Cai baoli Nankai Univ Dept Microbiol Tianjin 300071 Peoples R China Nankai Univ Minist Educ Key Lab Bioact Mat Tianjin 300071 Peoples R China

A bacterial strain (AD26) capable of utilizing atrazine as a sole nitrogen source for growth was isolated from an industrial wastewater sample by enrichment culture. The 16S rRNA gene sequencing identified AD26 as an Arthrobacter sp. PCR assays indicated that AD26 contained atrazine-degrading genes trzN and atzBC. The trzN gene of AD26 only differs from the trzN of Arthrobacter aurescens TC1 by one base (A→T at 907) and one amino acid (Met→Leu at 303). The specific activity of trzN of AD26 in crude cell ext...

关键词： atrazine biodegradation Arthrobacter sp. AD26 trzN gene bioremediation

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Average Consensus Control of Nonlinear Uncertain Multiagent Systems 36

Average Consensus Control of Nonlinear Uncertain Multiagent ...

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第36届中国控制会议

作者： Wenjing Xie baoli Ma School of Computer and Information Science Southwest University Department of Electrical Electronic and Computer EngineeringUniversity of Pretoria The Seventh Research Division School of Automation Science and Electrical EngineeringBeihang University

ISBN: (纸本)9781538629185

This paper investigates the average consensus control problem of a group of nonlinear uncertain systems.A novel distributed observer is presented to estimate the initial average state of the multiple nonlinear systems.A feedback controller is then constructed for each system to track the state of the observer,where the sliding-mode technology and the Lyapunov method are employed to address the difficulties caused by unknown individual nonlinear dynamics and bounded external *** combination of observer and sliding-mode technology releases the Lipschitz condition on nonlinear terms that is generally required in the published *** analysis shows that the states of all the nonlinear systems are globally asymptotically convergent to their initial average value,despite of the uncertain nonlinear dynamics with external *** results are obtained under the assumption that the communication graph is undirectional ***,a numerical simulation is provided to demonstrate the effectiveness of the proposed control law.

关键词： Nonlinear uncertain multiagent systems average consensus control distributed control distributed observer

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