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A Method for Time-Series Location Data Publication Based on Differential Privacy

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Wuhan University Journal of Natural Sciences 2019年第2期24卷 107-115页

作者： kang haiyan ZHANG Shuxuan JIA Qianqian Department of Information Security Beijing Information Science and Technology University Computer School Beijing Information Science and Technology University

In the age of information sharing, logistics information sharing also faces the risk of privacy leakage. In regard to the privacy leakage of time-series location information in the field of logistics, this paper proposes a method based on differential privacy for time-series location data publication. Firstly, it constructs public region of interest(PROI) related to time by using clustering optimal algorithm. And it adopts the method of the centroid point to ensure the public interest point(PIP) representing the location of the public interest zone. Secondly, according to the PIP, we can construct location search tree(LST) that is a commonly used index structure of spatial data, in order to ensure the inherent relation among location data. Thirdly, we add Laplace noise to the node of LST, which means fewer times to add Laplace noise on the original data set and ensures the data availability. Finally, experiments show that this method not only ensures the security of sequential location data publishing, but also has better data availability than the general differential privacy method, which achieves a good balance between the security and availability of data.

关键词： sequential location data publishing region of interest location search tree differential privacy

CuInS2/ZnS QDs-based fluorescent probe for detection of Cu2+

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Progress in Natural Science:Materials International 2023年第4期33卷 495-500页

作者： haiyan kang Hongchao Geng Sisi Shi Zhongxian Song Yuting Dong Xiaole Yan Chaohai Wang Yanli Mao Qingyun Cai Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology Henan University of Urban Construction State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University

High concentrations of Cu2+exceeding what the required level for the cellular process can changes the properties of protein, affects the normal function of the body, but also affect the body’s metabolism, so that the body’s immunity appears to decline. Detection of Cu2+is important for the environmental monitoring. Here, a fluorescence probe that uses heavy metal-free and properties-superior CuInS2/ZnS was proposed for detection of Cu2+. The fluorescence intensity of CuInS2/ZnS quantum dots(QDs) decreased obviously after Cu2+were added,and the intensity with the concentration of Cu2+showed excellent linear relation within the scope of 0–50 μM, the LOD down to 0.45 μM, a possible detection mechanism was analyzed. The QDs was further applied to the detection of Cu2+in drinking water, manifesting the foreground of the current strategy.

关键词： CuInS2/ZnS QDs Fluorescence probe Detection Cu2+

Molten solvent extraction behavior of trivalent La, Sm, Dy, and Yb with tri-n-butyl phosphate into molten paraffin wax at 60 ℃

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Rare Metals 2002年第1期21卷 7-11页

作者： PENG Bo, GAO Jinzhang, FAN haiyan, kang Jingwan, and YANG Wu Department of Chemistry, Northwest Normal University, Lanzhou 730070, China Department of Chemistry Northwest Normal University Lanzhou 730070

The extraction behavior of La^3+, Sm^3+, Dy^3+, and Yb^3+ insodium acetate-acetic acid medium was studied with tri-N-butylphosphate (TBP) at 60 deg. C using paraffin wax as a diluent. Theextraction percentage is greater than 85/100 in the pH range of 6 to8. The result of slope analysis method indicates that thecompositions of the extracted species are different between the lightand heavy rare ear this. The formula of the extracted species isfound to be La (TBP) (OH) (Ac)_2 for La^3+ and Yb (TBP) (OH)_3 forYb^3+. The effects of extracting time, the concentration of TBP inthe organic phase and salts on the extraction efficiency were alsodiscussed.

关键词： solvent extraction rare earth TBP Paraffin wax

Magnetic flower-like α-Fe2O3@N–C particles as an efficient adsorbent for removal of 2,4-dichlorophenol: Thermodynamics, kinetics and adsorption mechanism

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Progress in Natural Science:Materials International 2023年第6期33卷 935-946页

作者： Mengxia Ma Zhaoyang Li Xu Yan Yanli Mao Chaohai Wang haiyan kang Qun Yan Jieqiang Zhou Zhongxian Song Dandan Pang Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology Henan University of Urban Construction School of Civil and Surveying Engineering Jiangxi University of Science and Technology Henan International Joint Laboratory of Green Low Carbon Water Treatment Technology and Water Resources Utilization Henan University of Urban Construction Pingdingshan Huaxing Flotation Engineering Technology Service Co. Ltd.

Magnetic flower-like α-Fe2O3@N-C particles were synthesized by hydrothermal self-assembly method and oxygen-limited carbonisation in a glycerol and ethanol solution system using glucose as the carbon source,iron nitrate as the magnetic source and particle skeleton and urea as the nitrogen *** hydrothermal temperatures of 120℃,140℃,160℃ and 180℃ were used to modulate the adsorbent *** temperature of 140℃,solution pH=7,and a dosage of 0.06 g are the optimum *** adsorption capacity of 2,4-dichlorophenol(2,4-DCP) onto MC-2 was determined as 108.556 mg g-1at 25℃.Experiments show that the adsorbents all fitted well to the Langmuir isothermal adsorption model and the quasi-secondary kinetic model,and the adsorption behaviour was dominated by monolayer *** adsorption process was heat absorbing and *** and XRD analysis showed that the adsorbent had a stableα-Fe2O3skeleton and carbon *** and XPS analysis showed that the adsorbent had hydrogen bonding,electrostatic interaction and π-π bonding to 2,4-dichlorophenol.

关键词： Activated carbon Magnetic High efficiency adsorption Organic pollutants Low resistance to diffusion Adsorption mechanism

Studies on catalytic reduction of nitrate in groundwater

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Frontiers of Environmental Science & Engineering 2007年第3期1卷 357-361页

作者： GENG Bing ZHU Yanfang JIN Zhaohui LI Tielong kang haiyan WANG Shuaima College of Environmental Science and Engineering Nankai UniversityTianjin 300071China

Catalytic reduction of nitrate in groundwater by sodium formate over the catalyst was ***-Cu/c-Al2O3 catalyst was prepared by impregnation and charac-terized by brunauer-emmett-teller(BET),inductive coupled plasma(ICP),X-ray diffraction(XRD),transmission electron microscopy(TEM)and energy dispersive X-ray(EDX).It was found that total nitrogen was effectively removed from the nitrate solution(100 mg/L)and the removal efficiency was 87%.The catalytic activity was affected by pH,catalyst amount used,concentration of sodium formate,and initial concentration of *** sodium formate was used as reductant,precise control in the initial pH was ***-sively high or low initial pH(7.0 or 3.0)reduced catalytic *** initial pH of 4.5,catalytic activity was enhanced by reducing the amount of catalyst,while concentrations of sodium formate increased with a considerable decrease in N2 *** which case,catalytic reduction followed the first order kinetics.

关键词： catalytic reduction nitrate ammonium catalysis sodium formate

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面向医疗数据安全存储的增强混合加密方法

北京理工大学学报 2021年第10期41卷 1058-1068页

作者：康海燕邓婕北京信息科技大学信息管理学院北京100192 北京信息科技大学计算机学院北京100101

现实生活中病人的电子病历通常由就诊医院统一管理,其电子病历数据也都由医疗电子病历系统集中存储.这种集中式存储方式,在跨医院进行信息共享时会让病人的隐私信息存在泄露的风险.文中从信息安全中的关键技术—数字加密技术入手,分析... 详细信息

现实生活中病人的电子病历通常由就诊医院统一管理,其电子病历数据也都由医疗电子病历系统集中存储.这种集中式存储方式,在跨医院进行信息共享时会让病人的隐私信息存在泄露的风险.文中从信息安全中的关键技术—数字加密技术入手,分析了经典的对称加密算法(data encryption standard,DES)和非对称加密算法(Rivest-Shamir-Adleman,RSA),提出了面向医疗数据安全存储增强的混合加密方法.提出改进算法IBDES通过双重加密增强安全强度;提出改进算法EPNRSA在降低RSA加密时间复杂度的同时还保证了加密的安全质量;形成基于IBDES和EPNRSA的医疗数据增强混合加密方法.通过理论分析和仿真实验表明,该方法具有加解密效果好、执行速度快以及安全性高等优点,是面向医疗数据安全存储的一种理想方案.

关键词：医疗数据数据加密对称加密算法非对称加密算法

Inactivated SARS-CoV-2 booster vaccine enhanced immune responses in patients with chronic liver diseases

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Virologica Sinica 2023年第5期38卷 723-734页

作者： Yongmei Liu Jianhua Lu Haoting Zhan Wenfang Yuan Xiaomeng Li haiyan kang Haolong Li Yongliang Chen Linlin Cheng Xingli Sun Haojie Zheng Wei Wang Erhei Dai Yongzhe Li Department of Clinical Laboratory State Key Laboratory of ComplexSevere and Rare DiseasesPeking Union Medical College HospitalPeking Union Medical College and Chinese Academy of Medical SciencesBeijing100730China Division of Liver Diseases The Fifth Hospital of ShijiazhuangHebei Medical UniversityShijiazhuang050021China Department of Clinical Laboratory The Fifth Hospital of ShijiazhuangHebei Medical UniversityShijiazhuang050021China Department of Clinical Laboratory Peking University People's HospitalBeijing100035China

Chronic liver disease(CLD)entails elevated risk of COVID-19 severity and *** effectiveness of the booster dose of inactivated SARS-CoV-2 vaccine in stimulating antibody response in CLD patients is ***,we conducted a cross-sectional study involving 237 adult CLD patients and 170 healthy controls(HC)to analyze neutralizing antibodies(NAbs)against SARS-CoV-2 prototype and BA.4/5 variant,anti-receptor binding domain(RBD)IgG,and total anti-SARS-CoV-2 *** levels of the total anti-SARS-CoV-2 antibodies,anti-RBD IgG and inhibition efficacy of NAbs were significantly elevated in CLD patients after the booster dose compared with the pre-booster dose,but were relatively lower than those of *** humoral responses decreased over time after booster *** neutralization efficiency of the serum against BA.4/5 increased but remained below the inhibition *** four SARS-CoV-2 antibodies,including total anti-SARS-CoV-2 antibodies,anti-RBD IgG and NAbs against prototype and BA.4/5,were lower in patients with severe CLD than those with non-severe *** booster shot,age and time after the last vaccine were the risk factors for seropositivity of NAb against BA.4/5 in CLD ***,white blood cell counts and hepatitis B core antibodies were the protective factors,and severe liver disease was the risk factor associated with seropositivity of total anti-SARS-CoV-2 ***,our data uncovered that antibody responses were improved in CLD patients and peaked at 120 days after the booster *** antibodies excepting total anti-SARS-CoV-2 antibodies declined after *** patients exhibited impaired immunologic responses to vaccination and weakened NAbs against BA.4/5,which hindered the protective effect of the booster shot against Omicron *** immune responses should be further evaluated to determine the optimal vaccine regimen for CLD patients.

关键词： Chronic liver disease(CLD) SARS-CoV-2 inactivated vaccines Booster vaccination Antibody response Immune response

基于吸收马尔可夫链攻击图的网络攻击分析方法研究

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通信学报 2023年第2期44卷 122-135页

作者：康海燕龙墨澜北京信息科技大学信息管理学院北京100192

现有基于攻击图的入侵路径研究在计算状态转移概率时,缺乏对除基本网络环境信息以外因素的考虑,为了全面且合理地分析目标网络的安全性,提出了一种基于吸收马尔可夫链攻击图的网络攻击分析方法。首先,在攻击图的基础上,提出了一种基于... 详细信息

现有基于攻击图的入侵路径研究在计算状态转移概率时,缺乏对除基本网络环境信息以外因素的考虑,为了全面且合理地分析目标网络的安全性,提出了一种基于吸收马尔可夫链攻击图的网络攻击分析方法。首先,在攻击图的基础上,提出了一种基于漏洞生命周期的状态转移概率归一化算法;其次,使用该算法将攻击图映射为吸收马尔可夫链,并给出其状态转移概率矩阵;最后,对状态转移概率矩阵进行计算,全面分析目标网络的节点威胁程度、攻击路径长度、预期影响。在实验网络环境中应用所提方法,结果表明,所提方法能够有效分析目标网络中的节点威胁程度、攻击路径长度以及漏洞生命周期对网络整体的预期影响,有助于安全研究人员更好地了解网络的安全状态。

关键词：攻击图吸收马尔可夫链漏洞生命周期网络攻击网络安全分析

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面向大数据的个性化检索中用户匿名化方法

西安电子科技大学学报 2014年第5期41卷 148-154,160页

作者：康海燕 XIONG Li 北京信息科技大学信息管理学院信息安全系北京100192 Department of Mathcs Emory University Atlanta USA 30322

为解决大数据中个性化检索技术所潜在的用户隐私安全和提升个性化信息检索性能之间的矛盾,提出了基于差分隐私与p-link技术相结合的用户兴趣模型匿名化方法.首先对用户的准标示符进行泛化并添加噪音满足差分隐私保护要求,最大化统计数... 详细信息

为解决大数据中个性化检索技术所潜在的用户隐私安全和提升个性化信息检索性能之间的矛盾,提出了基于差分隐私与p-link技术相结合的用户兴趣模型匿名化方法.首先对用户的准标示符进行泛化并添加噪音满足差分隐私保护要求,最大化统计数据库中的查询精度,同时最小化识别个体及属性的概率;其次根据用户兴趣之间的相似性将其微聚为满足p-link的等价组,并计算微聚后等价组兴趣条目的权值和等价组质心;最后发布匿名化的数据.大量实验证明:该方法结合差分隐私与p-link两者的特性,实现用户兴趣模型匿名化且用户兴趣基本不发生改变,既能保护用户的隐私信息,又能保证个性化检索性能.

关键词：用户兴趣模型匿名化隐私保护信息安全差分隐私