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Tor被动流量分析综述

软件学报 2025年第1期36卷 253-288页

作者：梅汉涛程光朱怡霖周余阳东南大学网络空间安全学院江苏省泛在网络安全工程研究中心(东南大学) 网络空间国际治理研究基地(东南大学) 紫金山实验室

随着网络的蓬勃发展,用户隐私正面临着前所未有的挑战.人们开发出多种匿名通信系统来保护隐私,第2代洋葱路由Tor (the second-generation onion router)是目前最为广泛使用的匿名通信系统.然而,卓越的匿名性也使之成为不法分子犯罪的温... 详细信息

随着网络的蓬勃发展,用户隐私正面临着前所未有的挑战.人们开发出多种匿名通信系统来保护隐私,第2代洋葱路由Tor (the second-generation onion router)是目前最为广泛使用的匿名通信系统.然而,卓越的匿名性也使之成为不法分子犯罪的温床,如今Tor中充斥着非法交易、网络犯罪等. Tor被动流量分析通过被动观察网络流量对Tor进行去匿名化,已成为最热门的去匿名化技术.从Tor与流量分析基本概念出发,介绍Tor被动流量分析技术的应用场景与威胁模型.按照技术类型将现有工作分为流量分类技术与流关联技术,依据分析流程分别对比其流量采集方法、特征提取方法、使用算法.最后探讨当前研究面临的主要挑战与未来可能的研究趋势.

关键词： Tor 流量分析流量分类网站指纹流关联

Effect of Microfibrillated Cellulose Loading on Physical Properties of Starch/Polyvinyl Alcohol Composite Films

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Journal of Wuhan University of Technology(Materials Science) 2020年第4期35卷 825-831页

作者： TIAN Yu zhu Puxin zhou Mi lin yi cheng Fei College of Biomass Science and Engineering Sichuan UniversityChengdu 610065China

The starch/polyvinyl alcohol(PVA)/microfibrillated cellulose(MFC)composite films were prepared using solution casting method after adding MFC into starch/PVA blend *** effects of MFC content on the mechanical properties of starch/PVA composite films were *** MFC content increases,the elongation at break and tensile strength increase firstly and then *** the content of MFC is 2wt%,the tensile strength is 26.6 MPa and reaches the *** Fourier transform infrared(FTIR),scanning electron microscopy(SEM),X-ray diffraction(XRD)and thermogravimetric analysis(TGA),good dispersion of MFC in starch/PVA matrix at the loading of 2wt%,lower crystallinity of the starch/PVA/MFC films in comparison with starch/PVA blend and the effect of glass transition temperature increasing with MFC content from 0.5wt%to 4wt%can be found ***,incorporating MFC does not change the composition and crystal structure of the starch/PVA composite ***,the reinforcing mechanism for the improvement of mechanical properties is attributed to the homogeneous dispersion of MFC with large aspect ratio,good compatibility and interfacial interactions between starch/PVA blend matrix and MFC.

关键词： biopolymers fillers blends composites mechanical properties

Charcot Elbow Joint as the Initial Symptom in Chiari Malformation with Syringomyelia

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Chinese Medical Journal 2015年第24期128卷 3381-3382页

作者： yuan zhou lin zhu yi-xing lin hui-lin cheng Department of Neurosurgery Jinling Hospital School of Medicine Nanjing University Nanjing Jiangsu 210002 China

Charcot joint （CJ）, also known as neurotrophic arthropathy, is secondary to diabetes, syringomyelia, spinal tuberculosis, etc. The clinical manifestations are varied. The main performance includes pain, slightly restricted joint movement and very obvious swelling and damage of joint. It is easy to be misdiagnosed when the joint is the first symptom. We report a case of Charcot elbow joint as the initial symptom in Chiari malformation with syringomyelia.

关键词： Charcot Joint Chiari Malformation Magnetic Resonance Imaging Syringomyelia

High glass transition temperature dopant-free hole transport material via D-A-π-A-D-strategy for perovskite solar cell

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Rare Metals 2024年第12期43卷 6373-6383页

作者： cheng-hui Liao Li-Gang yuan yi-Heng Zhang Wei-Ya zhu Min-Chao Qin Zhi-Bo He Jie-lin Huang Hao-lin Xiao Zhi-Heng Li Xin-hui Lu Ke-You Yan yuan Li State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices School of Materials Science and EngineeringSouth China University of Technology School of Environment and Energy State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling South China University of Technology Department of Physics The Chinese University of Hong Kong

Despite the great leap forward perovskite solar cells(PSCs) have achieved in power conversion efficiency,the device instability remains one of the major problems plaguing its ***-free hole transport material(HTM) has been widely studied as an important strategy to improve the stability of PSCs due to its avoidance of moisture-sensitive dopants and cumbersome doping *** this work,a series of dopant-free HTMs L1F,L2F and L3F based on D-A-π-A-D configuration were synthesized through two steps of reaction.L3F presents a high glass transition temperature of 180 0C and thermal decomposition temperature of 448 ***,electron paramagnetic resonance signals of L1F,L2F and L3F powders indicate the open-shell quinoidal diradical resonance structure in their aggregation state due to aggregation-induced radical *** these HTMs present higher hole mobility than dopant-free Spiro-OMeTAD,and the dopant-free L3F-based PSC device achieves the highest power conversion efficiency of 17.6% among *** addition,due to the high hydrophobic properties of L1F,L2F and L3F,the perovskite films spin-coated with these HTMs exhibit higher humidity stability than doped *** results demonstrate a promising design strategy for high glass transition temperature dopant-free hole transport *** open-shell quinoid-radical organic semiconductors are not rational candidates for dopant-free HTMs for PSC devices.

关键词： D-A-π-A-D Dopant-free High glass transition temperature Hole transport materials Perovskite solar cells

Effects of Waterborne Elastic Polyester with Different Compositions on the Properties and Compatibility of Maize Starch

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Journal of Wuhan University of Technology(Materials Science) 2021年第4期36卷 465-471页

作者： ZHANG Kang ZHENG Yanping lin yi zhou Mi zhu Puxin WU Dacheng cheng Fei Textile Institute Sichuan UniversityChengdu610065China School of Chemistry and Chemical Engineering Hunan Institute of Science and TechnologyYueyang414000China Key Laboratory of Leather Chemistry and Engineer(Sichuan University) Ministry of EducationSichuan UniversityChengdu610065China

Waterborne elastic polyester (WEP) with different content of hard polyester was applied in the maize starch (MS) based composites (MS/WEP) via solution casting *** effects of WEP with different contents of hard polyester on the structure and properties of starch were studied by Fourier transform infrared,X-ray diffraction,ultraviolet-visible,tensile test,differential scanning calorimeter,thermogravimetric analysis and moisture *** experimental results show that the addition of WEP does not change the crystalline type of starch,and only reduces the crystallinity of *** the structure and properties of MS/WEP are related to not only the content of starch but also the microstructure of WEP or the content of hard polyester in *** elastic polyester with 30wt% hard polyester (WEP30) has the best modification effect on the maize starch among all the *** example,MS/WEP30 film has the optimum toughness,aging resistance and transmittance,the lowest crystallinity and glass transition temperature among all the MS/WEP films,and the lower moisture *** is related to the compatibility between starch and WEP,resulting from the number of physical crosslinking points in WEP..

关键词： maize starch waterborne elastic polyester hard polyester compatibility

Searching for exoplanets with HEPS:*** probability of Earth-like planets in multiple systems

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Research in Astronomy and Astrophysics 2019年第1期19卷 35-46页

作者： zhou-yi Yu hui-Gen Liu Ji-lin zhou Dong-Hong Wu Ming Yang Songhu Wang hui Zhang Zi zhu Jia-cheng Liu School of Astronomy and Space Science Key Laboratory of Modern Astronomy and Astrophysics in Ministry of EducationNanjing University Department of Astronomy Yale University

The astrometry method has great advantages in searching for exoplanets in the habitable zone around solar-like stars. However, the presence of multiple planets may cause a problem with degeneracy when trying to compute accurate planet parameters from observation data and reduce detectability. The degeneracy problem is extremely critical, especially in a space mission which has limited observation time and cadence. In this series of papers, we study the detectability of habitable Earth-mass planets in different types of multi-planet systems, aiming to find the most favorable targets for the potential space mission–Habitable ExoPlanet Survey(HEPS). In the first paper, we present an algorithm to find planets in the habitable zone around solar-like stars using astrometry. We find the detectability can be well described by planets' signal-to-noise ratio(SNR) and a defined parameter S = M2/(T1-T2)2, where M2 and T2are the mass and period of the second planet, respectively. T1 is the period of the planet in the habitable zone. The parameter S represents the influence of planetary architectures. We fit the detectability as a function of both the SNR of the planet in the habitable zone and the parameter S. An Earth-like planet in a habitable zone is harder to detect(with detectability PHP< 80%) in a system with a hot Jupiter or warm Jupiter(within2 AU), in which the parameter S is large. These results can be used in target selections and to determine the priority of target stars for HEPS, especially when we select and rank nearby planet hosts with a single planet.

关键词： astrometry stars:planetary systems planets and satellites:detection methods:numerical

Left atrial diameter and atrial fibrillation,but not elevated NT-proBNP,predict the development of pulmonary hypertension in patients with HFpEF

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Journal of Geriatric Cardiology 2020年第7期17卷 400-409页

作者： yi-Xian LIU hui LI yi-yuan XIA Chun-Lei XIA Xin-Liang QU Peng CHU Wen-yin zhou lin-lin zhu Li LI Shao-Liang CHEN Jun-Xia ZHANG Department of Cardiology Nanjing First HospitalNanjing Medical UniversityNanjingChina Laboratory of Cardiovascular Diseases Nanjing Heart CentreNanjingChina Department of Cardiology Guangzhou Red Cross HospitalJinan UniversityGuangzhouChina Department of Cardiology Nanjing First HospitalNanjing Medical UniversityNo.68 Changle RoadNanjing 210006China

Background The determinants of pulmonary hypertension(PH)due to heart failure with preserved ejection fraction(HFpEF)have been poorly investigated in patients with cardiovascular diseases(CVD).Methods From July 12017 to March 312019,a total of 149 consecutive HFp EF patients hospitalized with CVD were enrolled in this prospective cross-sectional study.A systolic pulmonary artery pressure(PASP)>35 mm Hg estimated by echocardiography was defined as PH-HFp *** regression was performed to establish predictors of PH in HFpEF *** Overall,the mean age of participants was 72±11 years,and 74(49.7%)patients were females.A total of 59(39.6%)patients were diagnosed with PH-HFpEF by *** left atrial diameter(LAD)was related to the ratio of the transmitral flow velocities/mitral annulus tissue velocities in early diastole(E/E’)and the left ventricular diameter in systole(LVDs).N-Terminal pro B-type natriuretic peptide(NT-proBNP)was not found to be associated with LAD and impaired diastolic or systolic function of the left *** logistic regression showed that atrial fibrillation(AF)increased the risk of PH-HFpEF incidence 3.46-fold with a 95%confidence interval(CI)of 1.44–8.32,P=***,LAD≥45 mm resulted in a 3.43-fold increased risk,95%CI:1.51–7.75,P=***,the significance levels of NT-proBNP,age and LVEF were underpowered in the regression *** variables,AF and LAD≥45 mm,predicted the PH-HFpEF incidence(C-statistic=0.773,95%CI:0.695–0.852,Pling of the left atrium were related to the incidence of PH in HFpEF patients with CVD.

关键词： Atrial fibrillation Ejection fraction Heart failure Left atrial diameter Pulmonary hypertension

Some new fixed point results under constraint inequalities in comparable complete partially ordered Menger PM-spaces

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Applied Mathematics(A Journal of Chinese Universities) 2022年第4期37卷 494-512页

作者： WU Zhao-qi ZHANG lin zhu Chuan-xi yuan cheng-gui ^Department of Mathematics Nanchang UniversityNanchang 330031China Institute of Mathematics Hangzhou Dianzi UniversityHangzhou 310018China Department of Mathematics Swansea UniversitySingleton ParkSA28PPUK

In this paper,we introduce the concept of comparable T-completeness of a partially ordered Menger PM-space and discuss the existence of fixed points for mappings satisfying certain conditions in the framework of a comparable T-complete partially ordered Menger *** obtain some new results which generalize many known ones in the ***,we derive some consequent results and give an example to illustrate our main result.

关键词： Menger PM-space fixed point constraint inequalities partial order implicit contraction

Research on monopulse forward-looking high-resolution imaging algorithm based on adaptive iteration

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Defence Technology（防务技术） 2020年第1期16卷 158-171页

作者： cheng cheng Xiao-dong zhou Min Gao zhu-lin Zong Yong-xiang Ji Bo Yu Department of Missile Engineering Army Engineering UniversityNo.97 Westroad HepingShijiazhuangChina Department of Ammunition Engineering Army Engineering UniversityNo.97 Westroad HepingShijiazhuangChina Research Institute of Electronic Science and Technology University of Electronic Science and TechnologyNo.4Section 2Jianbei RoadChengduChina China Huayin Weapon Test Center No.450 Yuemiao StreetHuayinShaanxiChina North Automatic Control Technology Institute No.351 Tiyu RoadTaiyuanChina

In this paper,we proposed a monopulse forward-looking high-resolution imaging algorithm based on adaptive iteration for missile-borne *** iteration,the proposed algorithm automatically selects the echo signal of isolated strong-scattering points from the receiving echo signal data to accurately estimate the actual optimal monopulse response curve(MRC) of the same distance range,and we applied optimal MRC to realize the azimuth self-focusing in the process of *** use real-time echo data to perform error correction for obtaining the optimal MRC,and the azimuth angulation accuracy may reach the optimum at a certain distance *** experimentally demonstrate the validity,reliability and high performance of the proposed *** azimuth angulation accuracy may reach up to ten times of the detection *** simulation experiments have verified the feasibility of this strategy,with the average height measurement error being 7.8%.In the out-field unmanned aerial vehicle(UAV) tests,the height measurement error is less than 25 m,and the whole response time can satisfy the requirements of a missile-borne detector.

关键词： Monopulse imaging High-resolution Adaptive iteration Missile-borne detector