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Differentially Private Event Histogram Publication on Sequences overGraphs

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Journal of Computer Science & Technology 2017年第5期32卷 1008-1024页

作者： Ning Wang yu Gu Jia Xu fang-fang Li Ge yu College of Computer Science and Engineering Northeastern University Shenyang 110819 China College of Computer Electronics and Information Guangxi University Nanning 530004 China

The big data era is coming with strong and ever-growing demands on analyzing personal information and footprints in the cyber world. To enable such analysis without privacy leak risk, differential privacy (DP) has been quickly rising in recent years, as the first practical privacy protection model with rigorous theoretical guarantee. This paper discusses how to publish differentially private histograms on events in time series domain, with sequences of personal events over graphs with events as edges. such individual-generated sequences commonly appear in formalized industrial workflows, online game logs, and spatial-temporal trajectories. Directly publishing the statistics of sequences may compromise personal privacy. While existing DP mechanisms mainly target at normalized domains with fixed and aligned dimensions, our problem raises new challenges when the sequences could follow arbitrary paths on the graph. To tackle the problem, we reformulate the problem with a three-step framework, which 1) carefully truncates the original sequences, trading off errors introduced by the truncation with those introduced by the noise added to guarantee privacy, 2) decomposes the event graph into path sub-domains based on a group of event pivots, and 3) employs a deeply optimized tree-based histogram construction approach for each sub-domain to benefit with less noise addition. We present a careful analysis on our framework to support thorough optimizations over each step of the framework, and verify the huge improvements of our proposals over state-of-the-art solutions.

关键词： differential privacy histogram publication sequence graph

经阴道腹膜外子宫肌瘤剔除术临床应用价值研究

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中国实用妇科与产科杂志 2024年第1期40卷 110-113页

作者：刘仙魏婧媛熊员焕罗蒲英汪利群苏钰芳罗文群李莉莎谢庆煌祝晓丽赵锐解放军联勤保障部队第908医院妇科江西南昌330001 江西省妇幼保健院妇科江西南昌330006 南昌大学医学部江西南昌330006 江西省人民医院妇科江西南昌330006 萍乡市第二人民医院妇产科江西萍乡337055 佛山市妇幼保健院妇科广东佛山528099

目的探讨经阴道腹膜外子宫肌瘤剔除术的临床应用价值。方法回顾性分析2015年7月至2023年7月在解放军联勤保障部队第908医院、江西省妇幼保健院、江西省人民医院和萍乡市第二人民医院因子宫下段或子宫颈肌瘤行经阴道子宫肌瘤剔除术患者38... 详细信息

目的探讨经阴道腹膜外子宫肌瘤剔除术的临床应用价值。方法回顾性分析2015年7月至2023年7月在解放军联勤保障部队第908医院、江西省妇幼保健院、江西省人民医院和萍乡市第二人民医院因子宫下段或子宫颈肌瘤行经阴道子宫肌瘤剔除术患者380例,分为研究组(经阴道腹膜外子宫肌瘤剔除术)180例和对照组(经阴道腹膜内子宫肌瘤剔除术)200例,按照患者有无子宫下段手术史分别比较两种术式的手术时间、术中出血量、术中损伤发生率、术后疼痛评分、肛门排气时间、以及术后病率。结果无论有无子宫下段手术史,研究组术后肛门排气时间(1.1±0.7)d较对照组(2.0±0.8)d短(P=0.03),术后疼痛评分(2.9±0.6)分较对照组(4.9±1.2)分低(P=0.02),术后病率(8.2%)也较对照组(21.7%)低(P=0.01)。在有子宫下段手术史患者中,研究组手术时间(73.7±15.1)min较对照组(98.3±16.1)min短(P=0.03),术中出血量(92.3±6.3)mL较对照组(159.7±15.2)mL少(P=0.01),术中损伤发生率(0.0%)较对照组(9.7%)低(P=0.04),术后疼痛评分(3.2±0.8)分较对照组(5.3±1.4)分低(P=0.04),肛门排气时间(1.3±0.6)d较对照组(2.7±0.7)d短(P=0.02),术后病率(8.6%)较对照组(24.2%)低(P=0.02)。结论经阴道腹膜外子下段及子宫颈肌瘤剔除术在术后患者早期排气、降低术后感染和疼痛方面优于腹膜内剔除术,尤其对于有子宫手术史的患者,腹膜外剔除术在降低手术时间和出血量,提高安全性方面亦有明显优势,值得临床推广应用。

关键词：经阴道腹膜外子宫下段子宫颈肌瘤剔除术

STRUCTURE AND RESTRUCTURING OF BEIJING-TIANJIN-HEBEI MEGALOPOLIS IN CHINA

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Chinese Geographical Science 2006年第1期16卷 1-8页

作者： yu Tao-fang School of Architecture Tsinghua University Beijing 100084 P. R. China

Scott proposes to use the term global city-regions to designate the phenomena that bear some resemblance to the "world cities" firstly identified by Hall and Friedmann and Wolff, and to the "global cities" of Sassen but whose essential social logic and contextual characteristics have evolved considerably since these pioneering studies were published. In simple geographical terms, a global city-region can be refered to comprise any major metropolitan area or any contiguous set of metropolitan areas together with a surrounding hinterland of variable extent-itself a locus of scattered urban settlements-whose internal economic and political affairs are bound up in intricate ways in intensifying and far-flung extra-national relationships. Scott refers to these extra-national relationships as a symptom of "globalization". As economic motors and political actors, the global city regions have been regarded as crucial parts of development strategies in China. In the "Eleventh Five-year Plan" issued by the National Development and Reform Commission of P. R. China, the Beijing-Tianjin-Hebei Province (Jing-Jin-Ji) region, one of the typical megalopolises or global city regions in the East Coastal China is paid more attention. This paper first analyzes the regional structure of the Jing-Jin-Ji region based on data of the fifth national population census of China. And then through the changes of the population growth, the dynamic process and mechanisms of the regional restructuring in the Jing-Jin-Ji is explored and discussed.

关键词： regional structure regional restructuring Beijing-Tianjin-Hebei (Jing-Jin-Ji)

Density Functional Studies on Isonicotinato Lead(II) Complex [Pb(C_5H_4NCOO)_2]

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Chinese Journal of Structural Chemistry 2006年第6期25卷 657-662页

作者： ZHAO Pu-su JIAN fang-fang LI Chun-Lei ZHENG Jian Department of Chemistry Huaiyin Teachers＇College Huaian Jiangsu 223001 China New Materials ＆ Function Coordination Chemistry Laboratory Qingdao University of Science and Technology Qingdao Shandong 266042 China

The title compound of isonicotinato lead（Ⅱ） [Pb（C5H4NCOO）2] has been optimized at B3LYP/LANL2DZ level of theory and calculated results show that the lead（Ⅱ） ion adopts 4-coordinate geometry. Atomic charge distributions indicate that during forming the title compound, each isonicotinic acid ion transfers -0.452 e to lead（Ⅱ） ion. The electronic spectra calculations show that there exist two absorption bands and the electronic transitions are mainly derived from the contribution of intraligand π→π^＊ transition and ligand-to-metal charge transfer （LMCT） transition. The thermodynamic properties of the title compound at different temperatures have been calculated and corresponding relations between property and temperature have also been obtained. The calculation of the second order optical nonlinearity was carried out, and the molecular hyperpolarizability was 3.62365^＊10^-30 esu.

关键词： isonicotinato lead(Ⅱ) complex density functional theory electronic spectra thermal property analysis the second order optical nonlinearity

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我国乡镇工业环境污染现状及其防治措施

铁道劳动安全卫生与环保 2001年第4期28卷 229-232页

作者：张春玲胡俊峰于素芳刘国庆山东大学公共卫生学院山东济南250012

对我国乡镇工业的环境污染问题进行了深入的调查研究。通过统计数据分析论证了乡镇工业污染源点多面广 ,污染源不断上升 ;污染物排放量迅速增加 ;污染物处理率、达标率低 ;污染范围呈现产业与区域的相对集中性等 4个基本特征 ,并提出解... 详细信息

对我国乡镇工业的环境污染问题进行了深入的调查研究。通过统计数据分析论证了乡镇工业污染源点多面广 ,污染源不断上升 ;污染物排放量迅速增加 ;污染物处理率、达标率低 ;污染范围呈现产业与区域的相对集中性等 4个基本特征 ,并提出解决乡镇工业环境污染

关键词：环境污染乡镇工业污染防治环境管理

广西边境地区长途卡车司机艾滋病相关高危行为及影响因素分析

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实用预防医学 2015年第2期22卷 137-140页

作者：何波农丽萍粟玉芳阙子文张建明钟海东广西南宁市疾病预防控制中心广西南宁530023 广西壮族自治区人民医院广西医科大学附属肿瘤医院凭祥市疾病预防控制中心

目的了解广西边境地区长途卡车司机艾滋病相关高危行为及影响因素,为进一步有针对性地在广西边境地区对长途卡车司机开展干预工作提供科学依据。方法按照《国家级HIV综合监测点监测方案》的要求,2013年5-6月在广西浦寨边境贸易城的停车... 详细信息

目的了解广西边境地区长途卡车司机艾滋病相关高危行为及影响因素,为进一步有针对性地在广西边境地区对长途卡车司机开展干预工作提供科学依据。方法按照《国家级HIV综合监测点监测方案》的要求,2013年5-6月在广西浦寨边境贸易城的停车场采用"滚雪球、同伴推动"等方法,对长途卡车司机进行面对面的问卷调查,并采集血样进行HIV、梅毒、HCV抗体检测,分析其中商业性行为者行为特征。结果共调查400名长途卡车司机中,有15.00%(60/400)的调查对象最近1年有过商业性行为,最近1年发生商业性行为时,每次都坚持使用安全套的比例为80.00%(48/60),最近1次商业性行为使用安全套的比例为93.33%(56/60)。调查对象答对6条以上的艾滋病知识知晓率为97.25%(389/400),HIV感染率为0.25%(1/400),梅毒检出率为2.25%(9/400);HCV检出率为0.50%(2/400)。HIV、梅毒和HCV两两间,均未发现双重感染。通过单因素和多因素Logistic回归分析,梅毒感染传播与长途卡车司机的商业性行为有关。结论需要不断采取有针对性的综合干预措施,使其改变高危行为或采取安全性行为,减少经长途卡车司机造成的艾滋病传播与蔓延。

关键词：长途卡车司机艾滋病高危行为影响因素

尿微量白蛋白水平对急性心肌梗死患者PCI术后心肌微循环障碍的预测价值

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川北医学院学报 2023年第3期38卷 358-361页

作者：赵美娜王紫韫苏玉芳曹亚珍宋雪晶石家庄市人民医院心血管内科河北石家庄050000 石家庄市人民医院超声科河北石家庄050000 石家庄市人民医院肿瘤科河北石家庄050000

目的:探讨尿微量白蛋白水平预测经皮冠状动脉介入治疗(PCI)的急性心肌梗死(AMI)患者术后心肌微循环障碍的临床价值。方法:根据患者术后心肌声学造影情况将98例行PCI治疗的AMI患者分为微循环障碍组(n=67)与正常组(n=31)。比较两组24 h尿... 详细信息

目的:探讨尿微量白蛋白水平预测经皮冠状动脉介入治疗(PCI)的急性心肌梗死(AMI)患者术后心肌微循环障碍的临床价值。方法:根据患者术后心肌声学造影情况将98例行PCI治疗的AMI患者分为微循环障碍组(n=67)与正常组(n=31)。比较两组24 h尿微量白蛋白(24 h-UmAlb)等临床资料差异,分析PCI后心肌微循环障碍的影响因素,并构建24 h-UmAlb预测PCI术后心肌微循环障碍的受试者工作特征(ROC)曲线。结果:与正常组比较,微循环障碍组女性比例、合并高血压比例及术前TIMI血流<3级比例更高(P<0.05),微循环障碍组血清BNP水平和24 h-UmAlb水平均增高(P<0.05)。Logisitic回归分析显示,女性、合并高血压、术前TIMI血流<3级及24 h-UmAlb水平均是AMI患者PCI后心肌微循环障碍的危险因素(P<0.05)。ROC曲线分析显示,24 h-UmAlb预测PCI后心肌微循环障碍的曲线下面积(AUC)为0.943(95%CI:0.877~0.980),最佳临界点为15.9 mg/24 h,此时的敏感度为88.06%,特异度为90.32%。结论:24 h-UmAlb是AMI患者PCI后心肌微循环障碍的影响因素,其检测有重要预测价值。

关键词：急性心肌梗死心肌微循环障碍经皮冠状动脉介入治疗尿微量白蛋白

Switch type PANI/ZnO core-shell microwire heterojunction for UV photodetection

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Journal of Materials Science & Technology 2022年第10期105卷 259-265页

作者： Yihan Chen Longxing su Mingming Jiang Xiaosheng fang Department of Materials Science Fudan UniversityShanghai 200433China Department of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China College of Science Nanjing University of Aeronautics and AstronauticsNanjing 211106China

In this study,single crystal ZnO microwires(MW)with size of~5.4 mm×30μm are prepared through a chemical vapor deposition technique at high temperature(1200℃).subsequently,p-type conducting polyaniline(PANI)polymers with different conductivities are densely coated on part of the ZnO MW to construct organic/inorganic core-shell heterojunction *** hetero-diodes reach an extremely high rectifcation ratio(I_(+3V)/I_(-3V))of 749230,and a maximum rejection ratio(I_(350nm)/I_(dark))of 3556(at-3 V),indicating great potential as rectifed *** the heterojunction devices exhibit strong response to ultraviolet(UV)radiation with high response ***,the obvious photovoltaic behavior can also be obtained,allowing the device to operate as an independent and stable unit without externally supplied *** 0 V bias voltage,the self-powered photodetector shows a maximum responsivity of 0.56 mA W~(-1)and a rapid response speed of 0.11 ms/1.45 ms(rise time/decay time).Finally,a fnite difference time domain(FDTD)simulation is performed to further demonstrate the interaction mechanism between the incident light feld and the hexagonal cavity,which strongly supports the enhancement of the light absorption in whispering-gallery-mode resonator.

关键词： Core-shell structure Heterojunction High rectifcation ratio Self-powered Photodetector

Single atom catalyst towards ammonia synthesis at mild conditions

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Science China Chemistry 2018年第9期61卷 1045-1046页

作者： Zhiwei fang Guihua yu Materials Science and Engineering Program and Department of Mechanical Engineering The University of Texas at Austin

Nitrogen is an essential nutrient element for all living organisms,however in its sufficient molecular form,nitrogen could not be utilized to meet the crucial need for global food requirements or industrial production due to its strong nonpolar N≡N triple ***,nitrogen fixation is an essential transformation but this only occurs in the nature with the help of nitrogenases[1].Although nitrogen can be artificially transformed into ammonia through the wellestablished Haber-Bosch process,the reaction is accomplished under drastic conditions,

关键词：氨合成温和条件催化剂原子氮固定工业生产有机体三元组