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TPII:tracking personally identifiable information via user behaviors in HTTP traffic

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Frontiers of Computer Science 2020年第3期14卷 175-187页

作者： yi LIU Tian song Lejian LIAO School of Computer Science Beijing Institute of TechnologyBeijing 100081China Network Information Center Yan'an UniversityYan'an 716000China School of Computer ScienceBeijing Institute of TechnologyBeijing 100081China

It is widely common that mobile applications collect non-critical personally identifiable information(PII)from users'devices to the cloud by application service providers(ASPs)in a positive manner to provide precise and recommending ***,Internet service providers(ISPs)or local network providers also have strong requirements to collect PIIs for finer-grained traffic control and security ***,it is a challenge to locate PIIs accurately in the massive data of network traffic just like looking a needle in a *** this paper,we address this challenge by presenting an efficient and light-weight approach,namely TPII,which can locate and track PIIs from the HTTP layer rebuilt from raw network *** approach only collects three features from HTTP fields as users'behaviors and then establishes a tree-based decision model to dig PIIs efficiently and *** any priori knowledge,TPII can identify any types of PIIs from any mobile applications,which has a broad vision of *** evaluate the proposed approach on a real dataset collected from a campus network with more than 13k *** experimental results show that the precision and recall of TPII are 91.72%and 94.51%respectively and a parallel implementation of TPII can achieve 213 million records digging and labelling within one hour,reaching near to support 1Gbps wirespeed inspection in *** approach provides network service providers a practical way to collect PIIs for better services.

关键词： network traffic analysis personally identifiable information privacy leakage mobile applications HTTP

Finite Time Ruin Probabilities and Large Deviations for Generalized Compound Binomial Risk Models

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Acta Mathematica Sinica,English Series 2005年第5期21卷 1099-1106页

作者： yi jun HU School of Mathematics and Statistics Wuhan University Wuhan 430072 P. R. China

In this paper, we extend the classical compound binomial risk model to the case where the premium income process is based on a Poisson process, and is no longer a linear function. For this more realistic risk model, Lundberg type limiting results for the finite time ruin probabilities are derived. Asymptotic behavior of the tail probabilities of the claim surplus process is also investigated.

关键词： Ruin probability (Generalized) compound binomial risk model Large deviations

Static tainting extraction approach based on information flow graph for personally identifiable information

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Science China(Information Sciences) 2020年第3期63卷 156-172页

作者： yi LIU Lejian LIAO Tian song School of Computer Science and Technology Beijing Institute of Technology College of Mathematics and Computer Science Yan'an University

Personally identifiable information(PII) is widely used for many aspects such as network privacy leak detection, network forensics, and user portraits. Internet service providers(ISPs) and administrators are usually concerned with whether PII has been extracted during the network transmission process. However,most studies have focused on the extractions occurring on the client side and server side. This study proposes a static tainting extraction approach that automatically extracts PII from large-scale network traffic without requiring any manual work and feedback on the ISP-level network traffic. The proposed approach does not deploy any additional applications on the client side. The information flow graph is drawn via a tainting process that involves two steps: inter-domain routing and intra-domain infection that contains a constraint function(CF) to limit the "over-tainting". Compared with the existing semantic-based approach that uses network traffic from the ISP, the proposed approach performs better, with 92.37% precision and 94.04%recall. Furthermore, three methods that reduce the computing time and the memory overhead are presented herein. The number of rounds is reduced to 0.0883%, and the execution time overhead is reduced to 0.0153%of the original approach.

关键词： personally identifiable information network privacy leak detection static tainting network traffic analysis information flow graph inter-domain routing intra-domain infection constraint function

Primary cilia in corneal development and disease

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Zoological Research 2020年第5期41卷 495-502页

作者： Ting song jun Zhou Institute of Biomedical Sciences Shandong Provincial Key Laboratory of Animal Resistance BiologyCollaborative Innovation Center of Cell Biology in Universities of ShandongCollege of Life SciencesShandong Normal UniversityJinanShandong 250014China State Key Laboratory of Medicinal Chemical Biology College of Life SciencesNankai UniversityTianjin 300071China

As a transparent avascular tissue located at the front of the eyeball, the cornea is an important barrier to external damage. Both epithelial and endothelial cells of the cornea harbor primary cilia, which sense changes in the external environment and regulate intracellular signaling pathways. Accumulating evidence suggests that the primary cilium regulates corneal development in several ways, including participation in corneal epithelial stratification and maintenance of corneal endothelial cell *** addition, the primary cilium has been implicated in the pathogenesis of several corneal diseases. In this review, we discuss recent findings that demonstrate the critical role of the primary cilium in corneal development. We also discuss the link between ciliary dysfunction and corneal diseases, which suggests that the primary cilium could be targeted to treat these diseases.

关键词： Cornea Development Disease Cilium Epithelium Endothelium Treatment

The Support of a Refinable Vector Satisfying an Inhomogeneous Refinement Equation

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Acta Mathematica Sinica,English Series 2010年第4期26卷 691-698页

作者： song LI yi SHEN Department of Mathematics Zhejiang University Hangzhou 310027 P. R. China

In this paper, we investigate the support of a refinable vector satisfying an inhomoge- neous refinement equation. By using some methods introduced by So and Wang, an estimate is given for the support of each component function of a compactly supported refinable vector satisfying an inhomogeneous matrix refinement equation with finitely supported masks.

关键词： support inhomogeneous refnement equation refinable vector

双光纤光栅级联Sagnac环多波长滤波系统研究

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光电子·激光 2025年第1期36卷 9-16页

作者：王翀伊依吴嘉辉宋坤周梦婷李苗苗西安邮电大学电子工程学院

为了实现可调谐的高精度滤波并扩大通信容量，本文设计了一种创新的滤波器系统方案，采用了双光纤布拉格光栅级联和Sagnac环的结合。该方案经过Jones矩阵理论的深入分析和数值仿真验证。在波长范围为1 554—1 570 nm的频带范围内，通过... 详细信息

为了实现可调谐的高精度滤波并扩大通信容量，本文设计了一种创新的滤波器系统方案，采用了双光纤布拉格光栅级联和Sagnac环的结合。该方案经过Jones矩阵理论的深入分析和数值仿真验证。在波长范围为1 554—1 570 nm的频带范围内，通过调整光纤臂长差来引入Sagnac相移，从而实现了可调谐性。此设计不仅增加了滤波通道数目，而且减小了半高全宽。值得注意的是，在相同的臂长差条件下，此系统相较于单个光纤光栅和Sagnac环的滤波器，精度有了显著提高。在功率损耗为8 dB的情况下，此滤波器系统允许高达196 nm的臂长误差容限，同时提供更为精确的透射谱，实现调谐更加简便。此滤波器系统具备易实现性，广泛适用于密集波分复用系统以及光通信等领域。

关键词：双光纤布拉格光栅级联 Sagnac环臂长误差可调谐

Perturbation Theory of Fractional Lagrangian System and Fractional Birkhoffian System

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Transactions of Nanjing University of Aeronautics and Astronautics 2018年第2期35卷 353-360页

作者： song Chuanjing Zhang yi School of Mathematics and Physics Suzhou University of Science and Technology College of Science Nanjing University of Science and Technology College of Civil Engineering Suzhou University of Science and Technology

Perturbation to symmetry and adiabatic invariants are studied for the fractional Lagrangian system and the fractional Birkhoffian system in the sense of Riemann-Liouville ***,the fractional Euler-Lagrange equation,the fractional Birkhoff equations as well as the fractional conservation laws for the two systems are ***,the definition of adiabatic invariant for fractional mechanical system is given,then perturbation to symmetry and adiabatic invariants are established for the fractional Lagrangian system and the fractional Birkhoffian system under the special and general infinitesimal transformations,***,two examples are devoted to illustrate the results.

关键词： perturbation theory fractional conservation law Riemann Liouville derivative fractional Euler-Lagrange equation fractional Birkhoff equation

Improved ant colony-based multi-constrained QoS energy-saving routing and throughput optimization in wireless Ad-hoc networks

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The Journal of China Universities of Posts and Telecommunications 2014年第1期21卷 43-53,59页

作者： WANG Ya-li song Mei WEI yi-fei WANG ying-he WANG Xiao-jun School of Electronic Engineering Beijing University of Posts and Telecommunications Chinese Academy of Science Shanghai Institute of Microsystem and Information Technology School of Electronic Engineering Dublin City University

In order to establish a route supporting multi-constrained quality of service（QoS）, increase network throughput and reduce network energy consumption, an improved ant colony-based multi-constrained QoS energy-saving routing algorithm（IAMQER） is proposed. The ant colony algorithm, as one of the available heuristic algorithms, is used to find the optimal route from source node to destination node. The proposed IAMQER algorithm, which is based on the analysis of local node information such as node queue length, node forwarding number of data packets and node residual energy, balances the relationship between the network throughput and the energy consumption, thus improving the performance of network in multi-constrained QoS routing. Simulation results show that this IAMQER algorithm can find the QoS route that reduce average energy consumption and improves network packet delivery ratio under the end-to-end delay and packet loss ratio constraints.

关键词： wireless Ad-hoc networks multi-constrained QoS routing ant colony algorithm energy-saving throughput optimization

Discrete Fractional Lagrange Equations of Nonconservative Systems

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Transactions of Nanjing University of Aeronautics and Astronautics 2019年第1期36卷 175-180页

作者： song Chuanjing ZHANG yi School of Mathematics and Physics Suzhou University of Science and Technology College of Civil Engineering Suzhou University of Science and Technology

In order to study discrete nonconservative system,Hamilton's principle within fractional difference operators of Riemann-Liouville type is given. Discrete Lagrange equations of the nonconservative system as well as the nonconservative system with dynamic constraint are established within fractional difference operators of Riemann-Liouville type from the view of time scales. Firstly,time scale calculus and fractional calculus are ***,with the help of the properties of time scale calculus,discrete Lagrange equation of the nonconservative system within fractional difference operators of Riemann-Liouville type is presented. Thirdly,using the Lagrange multipliers,discrete Lagrange equation of the nonconservative system with dynamic constraint is also *** two special cases are discussed. Finally,two examples are devoted to illustrate the results.

关键词： discrete Lagrange equation time scale fractional difference operator nonconservative system