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Moving target defense of routing randomization with deep reinforcement learning against eavesdropping attack

Digital Communications and Networks 2022年第3期8卷 373-387页

作者： Xiaoyu Xu Hao Hu Yuling Liu Jinglei Tan Hongqi Zhang haotian song Academy of People’s Armed Police Beijing100012China PLA SSF Information Engineering University Zhengzhou450001China Institute of Information Engineering Chinese Academy of SciencesBeijing100093China School of Cyber Security University of Chinese Academy of SciencesBeijing101408China

Eavesdropping attacks have become one of the most common attacks on networks because of their easy implementation. Eavesdropping attacks not only lead to transmission data leakage but also develop into other more harmful attacks. Routing randomization is a relevant research direction for moving target defense, which has been proven to be an effective method to resist eavesdropping attacks. To counter eavesdropping attacks, in this study, we analyzed the existing routing randomization methods and found that their security and usability need to be further improved. According to the characteristics of eavesdropping attacks, which are “latent and transferable”, a routing randomization defense method based on deep reinforcement learning is proposed. The proposed method realizes routing randomization on packet-level granularity using programmable switches. To improve the security and quality of service of legitimate services in networks, we use the deep deterministic policy gradient to generate random routing schemes with support from powerful network state awareness. In-band network telemetry provides real-time, accurate, and comprehensive network state awareness for the proposed method. Various experiments show that compared with other typical routing randomization defense methods, the proposed method has obvious advantages in security and usability against eavesdropping attacks.

关键词： Routing randomization Moving target defense Deep reinforcement learning Deep deterministic policy gradient

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Photonics Research 2024年第4期12卷 804-812页

作者： XIAOYU NIE haotian song WENHAN REN ZHEDONG ZHANG TAO PENG MARLAN O.SCULLY Institute for Quantum Science and Engineering Texas A&M UniversityCollege StationTexas 77843USA School of Physics Xi’an Jiaotong UniversityXi’an 710049China Department of Physics City University of Hong KongHong KongChina Baylor University WacoTexas 76706USA

The generation of speckle patterns via random matrices, statistical definitions, or apertures may not always result in optimal outcomes. Issues such as correlation fluctuations in low ensemble numbers and diffraction in long-distance propagation can arise. Instead of improving results of specific applications, our solution is catching deep correlations of patterns with the framework, Speckle-Net, which is fundamental and universally applicable to various systems. We demonstrate this in computational ghost imaging(CGI) and structured illumination microscopy(SIM). In CGI with extremely low ensemble number, it customizes correlation width and minimizes correlation fluctuations in illuminating patterns to achieve higher-quality images. It also creates non-Rayleigh nondiffracting speckle patterns only through a phase mask modulation, which overcomes the power loss in the traditional ring-aperture method. Our approach provides new insights into the nontrivial speckle patterns and has great potential for a variety of applications including dynamic SIM, X-ray and photo-acoustic imaging, and disorder physics.

关键词： CGI Deep ghost

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多用户大规模MIMO自适应安全传输策略

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电子与信息学报 2018年第6期40卷 1468-1475页

作者：金梁宋昊天钟州许晓明国家数字交换系统工程技术研究中心郑州450002

大规模MIMO系统采用空分多址可以提高系统吞吐量,同时利用多用户下行信号的相互协作可以对窃听者造成叠加干扰,带来了天然的安全增益。但目前该系统的物理层安全研究仍采用传统的人工噪声方案,忽略了多用户信号干扰带来的安全增益,造成... 详细信息

大规模MIMO系统采用空分多址可以提高系统吞吐量,同时利用多用户下行信号的相互协作可以对窃听者造成叠加干扰,带来了天然的安全增益。但目前该系统的物理层安全研究仍采用传统的人工噪声方案,忽略了多用户信号干扰带来的安全增益,造成严重的功率浪费。针对这一问题,该文分析了多用户信号干扰对系统可达平均安全速率和平均安全能效的影响,给出了系统的最佳接入用户区间。研究发现,在系统接入用户数较少和用户数较多时,系统安全能力较弱,针对此分别提出了N波束加扰和基于用户位置的用户调度的自适应安全传输策略。最后通过仿真验证了理论推导和所提策略的有效性,利用该文所提策略,能够保证系统天然安全能力不足时的安全通信。

关键词：大规模MIMO 物理层安全多用户自适应安全传输

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基于多源测高数据建立平均海面高模型

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大地测量与地球动力学 2023年第5期43卷 467-473页

作者：宋昊天文汉江程鹏飞刘焕玲于宏旭山东科技大学测绘与空间信息学院青岛市266590 中国测绘科学研究院北京市100036 自然资源部北京市100812

利用多源卫星测高数据构建9°~19°N、110°~116°E范围内分辨率为1′×1′的平均海面高模型,对ERM数据的共线平均、GM数据的时变改正、单星及多星间交叉点平差、格网化等方法进行阐述。实验结果表明,平均海面高模型与CLS15差值的平均值... 详细信息

利用多源卫星测高数据构建9°~19°N、110°~116°E范围内分辨率为1′×1′的平均海面高模型,对ERM数据的共线平均、GM数据的时变改正、单星及多星间交叉点平差、格网化等方法进行阐述。实验结果表明,平均海面高模型与CLS15差值的平均值(mean)、均方根(RMS)、标准差(STD)分别为0.59 cm、 2.85 cm、2.79 cm,与DTU18差值的mean、RMS、STD分别为2.06 cm、4.17 cm、3.62 cm。利用独立于模型的测高数据(Sentinel-3B、HY-2B)验证模型的精度,建立MSS时使用HY-2A、Jason-3和Sentinel-3A卫星数据,再通过与T/P(TOPEX/Poseidon)数据的对比,分析新数据对MSS的提升作用。

关键词：卫星测高平均海面高模型共线平均 CLS15

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力电比拟法在波浪能装置最大功率求解中的应用

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数学建模及其应用 2023年第1期12卷 35-43,113页

作者：宋昊天夏天乐张烨阳贺丹东南大学信息科学与工程学院江苏南京211102 东南大学物理学院江苏南京211102 东南大学数学学院江苏南京211102

研究了一种振荡浮子式波浪能发电装置的运动以及阻尼器系数对发电效能的影响,并根据装置平衡与垂荡运动时的受力条件,建立二元二阶微分方程组模型.对阻尼系数恒定和不恒定两种情况分别求解,前者采用拉氏变换法可以得到微分方程组的解析... 详细信息

研究了一种振荡浮子式波浪能发电装置的运动以及阻尼器系数对发电效能的影响,并根据装置平衡与垂荡运动时的受力条件,建立二元二阶微分方程组模型.对阻尼系数恒定和不恒定两种情况分别求解,前者采用拉氏变换法可以得到微分方程组的解析解,后者采用四阶Runge-Kutta法可以得到数值解.在求解阻尼系数恒定时的最大功率时,采用力电比拟法,即将力学方程比拟成电学方程,应用相量法将阻尼器的输出功率转化为电阻的最大功率进行求解.经计算,在设定的波浪条件和阻尼系数下,1 m量级的发电装置功率可以达到229.34 W,与同等量级的太阳能电池板相当.

关键词：波浪发电装置力电比拟法拉普拉斯变换龙格库塔法

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Tuned Morphological Electrospun Hydroxyapatite Nanofibers via pH

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Journal of Bionic Engineering 2012年第4期9卷 478-483页

作者： Xiaofeng song Fengguang Ling haotian Li Zhantuan Gao Xuesi Chen School of Chemical Engineering Changchun University of Technology Changchun 130012 P. R. China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China

The concept of biocompatible, osteoconductive and noninflammatory material mimicking the structure of natural bone has generated a considerable interest in recent decades. Hydroxyapatite （HA） is an important bionic material that is used for bone grafting in osseous defects and drug carriers. HA with various morphologies and surface properties have been widely investi- gated. In this paper, HA nanofibers are produced through a combination of electrospinning and sol-gel technique. The mor- phologies, composition and structure are investigated by Scanning Electron Microscopy （SEM）, Thermogravimetic Analysis （TGA）, Fourier Transform Infrared （FTIR）, X-ray Diffraction （XRD） patterns, Transmission Electron Microscopy （TEM）. The results show that HA nanofibers are even and well-crystallized, and pH is crucial for producing HA nanofibers. With the change of pH from 4 to 9, nanofibers grow densely along （210） plane and become compact while surface area, pore volume and pore size decrease correspondingly. The synthesized HA nanofibers are nontoxic and safe. Zn can be also incorporated into HA nanofibers, which will endow them with more perfect function.

关键词： electrospinning sol hydroxyapatite pH

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Parameter Effects of the Potential‑Field‑Driven Model Predictive Controller for Shared Control

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Automotive Innovation 2023年第1期6卷 48-61页

作者： Mingjun Li Chao Jiang Xiaolin song haotian Cao State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China

Parameter effects of the potential-field-driven model predictive control(PF-MPC)method on performances of shared control systems during obstacles avoidance are *** PF-MPC controllers of autonomous driving and shared control systems are designed based on the constructed potential fields and model predictive control method,and the driver-vehicle dynamics and the driver-related costs are also considered in the design of the shared *** explore a potential approach of alleviating driver-automation conflicts of the shared control systems,different motion planning results generated by the PF-MPC controller are explored by adjusting effects of potential fields’parameters,which provides possibilities to decrease driver-automation conflicts between the planned trajectory and driver’s target ***,two case studies are designed to discuss different frameworks and parameters effects on shared control *** show that the proposed shared control frameworks considering driver-vehicle dynamics and the driver-related cost show better performances regarding driver-automation conflicts management and driving safety than the decentralized control *** the longitudinal normalized constant of potential fields parameters shows influences on the driver-automation conflicts management and driving safety performances of shared control.

关键词： PF-MPC method Potential field Parameter effect Driver-automation conflict

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基于TRIZ理论的造纸黑液解聚物催化提质中催化剂的设计与应用

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科技创新与应用 2024年第31期14卷 30-33页

作者：李治宇宋昊天闫金良马立修付鹏山东理工大学农业工程与食品科学学院山东淄博255000 山东理工大学创新创业学院山东淄博255000

该文介绍造纸黑液解聚物催化加氢脱氧制烃类液体燃料的研究现状及目前所面临的主要问题,通过列举实例详细阐述TRIZ理论如何直接与造纸黑液解聚物加氢脱氧制烃类液体燃料实验相结合,开发新型催化剂,突破现有瓶颈。针对催化效率低的问题,... 详细信息

该文介绍造纸黑液解聚物催化加氢脱氧制烃类液体燃料的研究现状及目前所面临的主要问题,通过列举实例详细阐述TRIZ理论如何直接与造纸黑液解聚物加氢脱氧制烃类液体燃料实验相结合,开发新型催化剂,突破现有瓶颈。针对催化效率低的问题,采用TRIZ理论中的复合材料原理、预先作用原理、压力原理对其进行解决。研究Hβ、Mo/Hβ、NiMo/Hβ3种催化剂用于造纸黑液解聚物加氢脱氧制烃类液体燃料。测试结果证实,NiMo/Hβ催化剂表现出最优异的催化活性。基于分析过程进一步拓宽对TRIZ理论的认识,为其更好地指导科学研究发挥作用。

关键词： TRIZ原理造纸黑液解聚物复合材料原理预先作用原理压力原理

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Recharge processes limit the resource elements of Qarhan Salt Lake in western China and analogues in the evaporite basins

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Journal of Oceanology and Limnology 2023年第4期41卷 1226-1242页

作者： Hualing song Qishun FAN Qingkuan LI Tianyuan CHEN haotian YANG Chunmei HAN Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes Xining 810008China University of Chinese Academy of Sciences Beijing 100049China

The Qarhan Salt Lake(QSL)in western China is K-Sr-Li-B-Br-Rb multi-resource coexisting Quaternary brine *** research efforts have been directed to the origin of K-Li resources and evolutionary history of the ***,the study on the different sources,recharge processes,and differential distribution patterns for these resource elements in brine deposits is still ***,we measured Li-B concentrations and H-O-Sr-B isotopic compositions of different waters(river,spring,and brine)from the QSL,combined with the reported K-Sr contents and multiple isotopes of waters,to discuss the recharge,source of K-Sr-Li-B and their spatial distributions,by analogy with other evaporite basins in the *** results show that:(1)the K-Li-B-Sr elemental concentrations of brines and their spatial distribution in the QSL are diverse;(2)high K and Sr values are distributed in Dabuxun and Qarhan sections,respectively,which are controlled by Ca-Cl springs in the northern QSL;on the contrary,Li and B values are enriched in the Bieletan section and are charged by thermal springs in the Kunlun Mountains;(3)the formation and evolution of Ca-Cl and thermal springs constrain fundamentally on the recharge processes of K-Sr and Li-B elements in the terminal salt lakes of the Qaidam Basin(QB);(4)some analogues of recharge processes limit the resource elements of the QSL and other salt lakes(Da Qaidam,Lop Nur,Zhabuye,Atacama,and Guayatayoc)in the world provides a reference for the resource exploration in deep formation waters in the evaporite basins.

关键词： K-Sr-Li-B elements differential distribution recharge process Qarhan Salt Lake(QSL) analogue

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An investigation on the link between driver demographic characteristics and distracted driving by using the SHRP 2 naturalistic driving data

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Journal of Intelligent and Connected Vehicles 2020年第1期3卷 1-16页

作者： haotian Cao Zhenghao Zhang Xiaolin song Hong Wang Mingjun Li song Zhao Jianqiang Wang College of Mechanical and Vehicle Engineering Hunan UniversityChangshaChina Department of Mechanical and Mechatronics Engineering University of WaterlooWaterlooCanada Aptiv TroyMichiganUSA Tsinghua University BeijingChina

Purpose–The purpose of this paper is to investigate the inﬂuence of driver demographic characteristics on the driving safety involving cell phone ***/methodology/approach–A total of 1,432 crashes and 19,714 baselines were collected for the Strategic Highway Research Program 2 naturalistic driving *** authors used a case-control approach to estimate the prevalence and the population attributable risk *** mixed logistic regression model is used to evaluate the correlation between different driver demographic characteristics(age,driving experience or their combination)and the crash risk regarding cell phone engagements,as well as the correlation among the likelihood of the cell phone engagement during the driving,multiple driver demographic characteristics(gender,age and driving experience)and environment ***–Senior drivers face an extremely high crash risk when distracted by cell phone during driving,but they are not involved in crashes at a large *** the contrary,cell phone usages account for a far larger percentage of total crashes for young ***,experienced drivers and experienced-middle-aged drivers seem less likely to be impacted by the cell phone while driving,and cell phone engagements are attributed to a lower percentage of total crashes for ***,experienced,senior or male drivers are less likely to engage in cell phone-related secondary tasks while ***/value–The results provide support to guide countermeasures and vehicle design.

关键词： Prevalence Distracted driving related to cell phones Driver demographic characteristics Naturalistic driving study Population attributable risk percentage

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