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Trusted Encrypted Traffic Intrusion Detection Method Based on Federated Learning and Autoencoder

China Communications 2024年第8期21卷 211-235页

作者： Wang Zixuan Miao Cheng Xu Yuhua Li Zeyi sun zhixin Wang Pan School of Modern Posts Nanjing University of Posts&TelecommunicationsNanjing 210003China School of Computer Science Nanjing University of Posts&TelecommunicationsNanjing 210003China

With the rapid development of the Internet,network security and data privacy are increasingly *** classical Network Intrusion Detection System(NIDS)based on Deep Learning(DL)models can provide good detection accuracy,but collecting samples for centralized training brings the huge risk of data privacy ***,the training of supervised deep learning models requires a large number of labeled samples,which is usually ***“black-box”problem also makes the DL models of NIDS *** this paper,we propose a trusted Federated Learning(FL)Traffic IDS method called FL-TIDS to address the above-mentioned *** FL-TIDS,we design an unsupervised intrusion detection model based on autoencoders that alleviates the reliance on marked *** the same time,we use FL for model training to protect data *** addition,we design an improved SHAP interpretable method based on chi-square test to perform interpretable analysis of the trained *** conducted several experiments to evaluate the proposed *** first determine experimentally the structure and the number of neurons of the unsupervised AE ***,we evaluated the proposed method using the UNSW-NB15 and CICIDS2017 *** exper-imental results show that the unsupervised AE model has better performance than the other 7 intrusion detection models in terms of precision,recall and ***,federated learning is used to train the intrusion detection *** experimental results indicate that the model is more accurate than the local learning ***,we use an improved SHAP explainability method based on Chi-square test to analyze the *** analysis results show that the identification characteristics of the model are consistent with the attack characteristics,and the model is reliable.

关键词： autoencoder federated learning intrusion detection model interpretation unsupervised learning

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Cambrian integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年第4期67卷 950-970页

作者： zhixin sun Lang sun Fangchen ZHAO Bing PAN Malik Muhammad Saud Sajid KHAN Shehryar AHMED Chuan YANG Lanyun MIAO Zongjun YIN Guoxiang LI Maoyan ZHU State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

The Qinghai-Tibetan Plateau and its surrounding areas have a long and complex tectonic evolutionary *** and blocks,such as northern India,Lhasa,Qiangtang,Qaidam and Central Qilian,and their in-between orogenic belts constitute the main part of the Qinghai-Tibetan *** the Cambrian Period,most of these cratons and blocks were on the northwestern periphery of Gondwana,and were associated with the surrounding blocks,***,Central Iran,Afghanistan,Tarim,Alxa,North China,South China and Sibumasu through the Proto-Tethys *** Cambrian stratigraphic sequences on these stable blocks are composed of mixed siliciclastic and carbonate rocks deposited in the shallow-water marine environments,and contain the trilobite assemblages of shelf *** Cambrian stratigraphic sequences in the Qilian tectonic belts,however,are characterized by the intermediate-basic igneous rocks and silicates formed in the Proto-Tethys Ocean,and contain the trilobite assemblages of deep-water slope *** with previous data,field observations and newly discovered fossils through funding by the Second Tibetan Plateau Scientific Expedition and Research,the general characteristics of the Cambrian strata in different tectonic units of the Qinghai-Tibetan Plateau and its surrounding areas have been summarized in this ***,efforts have been made to subdivide and correlate the Cambrian strata across these areas by utilizing available biostratigraphic and geochronological *** a result,a comprehensive litho-and biostratigraphy chart has been ***,from the biogeographic perspective,this paper also provides a brief overview of the Cambrian paleogeographical reconstruction of the major tectonic blocks,and discusses the problems associated with the evolution of the ProtoTethys tectonic belt.

关键词： Qinghai-Tibetan Plateau Cambrian Stratigraphy Paleogeography Biota Gondwana Proto-Tethys Ocean

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Cryogenian and Ediacaran integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年第4期67卷 919-949页

作者： Lang sun Malik Muhammad Saud Sajid KHAN Chuan YANG zhixin sun Bing PAN Shehryar AHMED Lanyun MIAO Weichen sun Chunlin HU Xiaojuan sun Cui LUO Bo CHEN Zongjun YIN Fangchen ZHAO Guoxiang LI Maoyan ZHU State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

The complex evolutionary history of the Qinghai-Tibetan Plateau and its surrounding areas,including the continental blocks(Indian,Lhasa,South Qiangtang,Tarim,Olongbuluk,Central Qilian,Alxa,North China,Yangtze,Central Iran and Oman)and the orogenic belts between them,has long been the frontier in Earth science *** Cryogenian and Ediacaran strata are extensively distributed in these ***,relatively complete Cryogenian and Ediacaran successions have been discovered in Oman,Indian,Yangtze,and Tarim blocks,while only the Ediacaran successions have been reported in Iran,the South Qiangtang,Central Qilian,Alxa,and North China *** on previous studies together with the integration of new materials and advancement obtained through the Second Tibetan Plateau Scientific Expedition and Research,this review aims to synthesize a correlative stratigraphic framework of the representative Cryogenian and Ediacaran sequences from the Qinghai-Tibetan Plateau and its surrounding ***,the Cryogenian and Ediacaran biotas and major geological events in these areas are comprehensively discussed in aspects of current research *** results indicate that,in general,Ediacaran fossils of each area exhibit distinct features in preservation and assemblage composition,but the typical late Ediacaran fossils Cloudina and Shaanxilithes have been reported from most of these *** addition to the two global Cryogenian glaciations,late Ediacaran glaciogenic deposits are extensively recorded in the areas within and around the northern QinghaiTibetan Plateau(including the North China,Alxa,Central Qilian,Olongbuluk,and Tarim blocks,and the North Qilian Accretionary Belt),as well as central and southern ***,further research is required to determine the age,distribution,and origin of these late Ediacaran glaciogenic ***,the middle Ediacaran DOUNCE/Shuram Excursion is widely documented in the Qinghai-Tibetan Plateau and its surroundi

关键词： Qinghai-Tibetan Plateau Cryogenian Ediacaran Stratigraphy Palaeogeography Biota Gondwana

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Cryogenian and Ediacaran integrative stratigraphy, biotas, and palaeogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年

作者： Lang sun Malik Muhammad Saud Sajid KHAN Chuan YANG zhixin sun Bing PAN Shehryar AHMED Lanyun MIAO Weichen sun Chunlin HU Xiaojuan sun Cui LUO Bo CHEN Zongjun YIN Fangchen ZHAO Guoxiang LI Maoyan ZHU State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences

The complex evolutionary history of the Qinghai-Tibetan Plateau and its surrounding areas, including the continental blocks (Indian, Lhasa, South Qiangtang, Tarim, Olongbuluk, Central Qilian, Alxa, North China, Yangtze, Central Iran and Oman) and the orogenic belts between them, has long been the frontier in Earth science research. The Cryogenian and Ediacaran strata are extensively distributed in these blocks. Specifically, relatively complete Cryogenian and Ediacaran successions have been discovered in Oman, Indian, Yangtze, and Tarim blocks, while only the Ediacaran successions have been reported in Iran,the South Qiangtang, Central Qilian, Alxa, and North China blocks. Based on previous studies together with the integration of new materials and advancement obtained through the Second Tibetan Plateau Scientific Expedition and Research, this review aims to synthesize a correlative stratigraphic framework of the representative Cryogenian and Ediacaran sequences from the Qinghai-Tibetan Plateau and its surrounding areas. Furthermore, the Cryogenian and Ediacaran biotas and major geological events in these areas are comprehensively discussed in aspects of current research status. The results indicate that, in general,Ediacaran fossils of each area exhibit distinct features in preservation and assemblage composition, but the typical late Ediacaran fossils Cloudina and Shaanxilithes have been reported from most of these areas. In addition to the two global Cryogenian glaciations, late Ediacaran glaciogenic deposits are extensively recorded in the areas within and around the northern QinghaiTibetan Plateau (including the North China, Alxa, Central Qilian, Olongbuluk, and Tarim blocks, and the North Qilian Accretionary Belt), as well as central and southern Iran. However, further research is required to determine the age, distribution, and origin of these late Ediacaran glaciogenic deposits. Meanwhile, the middle Ediacaran DOUNCE/Shuram Excursion is widely documented in

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基于自适应交互式多模型的永磁同步电机无感控制

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包装工程 2024年第11期45卷 183-190页

作者：金爱娟孙治鑫李少龙上海理工大学上海200093

目的改善包装印刷机器的控制性能,减少包装印刷机器所用传感器数量和电机控制系统成本,减小包装印刷机械装置故障率和电机体积,针对传统扩展卡尔曼滤波算法中模型可能不匹配实际工况的问题,提出一种自适应多模型无感控制策略。方法基于... 详细信息

目的改善包装印刷机器的控制性能,减少包装印刷机器所用传感器数量和电机控制系统成本,减小包装印刷机械装置故障率和电机体积,针对传统扩展卡尔曼滤波算法中模型可能不匹配实际工况的问题,提出一种自适应多模型无感控制策略。方法基于传统扩展卡尔曼滤波,引入多模型,在输入环节依靠状态转移概率矩阵实现多个模型间的交互,并借助隐马尔可夫模型,设计多模型的状态序列和观测序列,将观测得到的矩阵对多模型交互环节的状态转移概率矩阵进行迭代更新,提高模型面对环境扰动时的匹配程度。结果Matlab/Simulink仿真结果表明,改进后的算法使转速的估计精度得到显著提升,同时在面对环境扰动时,其抗扰动能力显著提高。结论与传统扩展卡尔曼滤波算法相比,改进算法提高了系统控制精度,提高了动态性能和鲁棒性,改进后算法更适合应用于包装印刷机械。

关键词：永磁同步电机扩展卡尔曼滤波器交互式多模型隐马尔可夫模型

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AGV路径规划及避障算法研究综述

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小型微型计算机系统 2024年第3期45卷 529-541页

作者：赵学健叶昊贾伟孙知信南京邮电大学现代邮政学院南京210003 南京邮电大学江苏省邮政大数据技术与应用工程研究中心南京210003 南京先维信息技术有限公司南京210001

自动导向车(Automated Guided Vehicle,AGV)目前被广泛应用于物流、仓储、制造业和仓储等领域.AGV的路径规划和避障算法是实现AGV自主导航的关键技术,决定了AGV在复杂环境中能否高效、安全地完成任务,近年来成为AGV领域的重要研究热点之... 详细信息

自动导向车(Automated Guided Vehicle,AGV)目前被广泛应用于物流、仓储、制造业和仓储等领域.AGV的路径规划和避障算法是实现AGV自主导航的关键技术,决定了AGV在复杂环境中能否高效、安全地完成任务,近年来成为AGV领域的重要研究热点之一.本文根据AGV路径规划及避障算法的原理与特点,将主流AGV路径规划及避障算法划分为局部避障路径规划算法、基于几何模型的路径规划算法、智能路径规划算法和混合算法4类,对算法的原理、工作流程、优缺点进行了深入分析,并介绍了相应的改进算法.最后,本文对AGV路径规划及避障的未来发展趋势进行展望,为AGV路径规划及避障算法的研究指出了方向.

关键词： AGV 路径规划避障算法物流

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基于新型趋近律的PMSM-DTC无感控制

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建模与仿真 2024年第3期13卷 3042-3050页

作者：韩冬冬孙治鑫上海理工大学光电信息与计算机工程学院上海

在永磁同步电机直接转矩控制(PMSM-DTC)系统中,通常需要通过机械传感器获取转速及位置信息。然而,这种传感器的应用不仅增加了电机系统的成本,而且在复杂环境下难以有效运作。为解决上述问题,本研究引入了模型参考自适应算法,用于跟踪... 详细信息

在永磁同步电机直接转矩控制(PMSM-DTC)系统中,通常需要通过机械传感器获取转速及位置信息。然而,这种传感器的应用不仅增加了电机系统的成本,而且在复杂环境下难以有效运作。为解决上述问题,本研究引入了模型参考自适应算法,用于跟踪电机的转速和位置,从而实现了PMSM-DTC系统的无感控制。同时,本研究结合了滑模控制,并引入了一种新型的趋近律来改进模型参考自适应算法。通过在Matlab/Simulink中建立仿真模型进行验证,结果表明,所提出的基于新型趋近律的PMSM-DTC无感控制方法能够有效地跟踪电机的转速和位置,从而节约了电机系统的成本。

关键词：永磁同步电机直接转矩控制模型参考自适应新型趋近律

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温度对过氧化氢抑制前成骨细胞MC3T3-E1细胞增殖和成骨分化的影响

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新乡医学院学报 2024年第2期41卷 109-114页

作者：耿卢婧孙智欣李俞辰张瑜史培培新乡医学院生命科学技术学院河南新乡453003

目的探讨温度对过氧化氢(H_(2)O_(2))抑制前成骨细胞增殖和成骨分化的影响。方法取对数生长期MC3T3-E1细胞,随机分为0、450、500、550、600、650μmol·L^(-1)H_(2)O_(2)干预组,分别给予0、450、500、550、600、650μmol·L^(-1)H_(2)O_(2)溶液干预2 h。另取对数生长期MC3T3-E1细胞,随机分为对照组、模型组、低温组和高温组。对照组细胞置于37℃、含体积分数5%CO_(2)培养箱中孵育24 h;模型组细胞置于37℃、含体积分数5%CO_(2)培养箱中孵育24 h,并给予H_(2)O_(2)刺激2 h;低温组细胞置于32℃、含体积分数5%CO_(2)培养箱中孵育24 h,并给予H_(2)O_(2)刺激2 h;高温组细胞置于40℃、含体积分数5%CO_(2)培养箱中孵育24 h,并给予H_(2)O_(2)刺激2 h。采用细胞计数试剂盒-8检测各组细胞增殖能力,实时荧光定量聚合酶链反应法检测细胞中Runt相关转录因子2(RUNX2)、骨桥蛋白(OPN)和骨钙素(OC)mRNA表达水平,Western blot法检测MC3T3-E1细胞中RUNX2、OPN和OC蛋白表达水平。结果0、450、500μmol·L^(-1)H_(2)O_(2)干预组细胞增殖率比较差异无统计学意义(P>0.05);550、600、650μmol·L^(-1)H_(2)O_(2)干预组细胞增殖率显著低于0、450、500μmol·L^(-1)H_(2)O_(2)干预组,且随H_(2)O_(2)浓度增加细胞增殖率显著降低(P0.05)。模型组和高温组细胞中RUNX2 mRNA相对表达量显著高于对照组和低温组,低温组细胞中RUNX2 mRNA相对表达量显著低于对照组(P0.05)。模型组、低温组和高温组细胞中OPN mRNA相对表达量显著高于对照组,低温组和高温组细胞中OPN mRNA相对表达量显著高于模型组,低温组细胞中OPN mRNA相对表达量显著高于高温组(P0.05)。模型组、低温组和高温组细胞中RUNX2、OPN和OC蛋白相对表达量显著低于对照组(P0.05)。高温组细胞中RUNX2、OPN和OC蛋白相对表达量显著高于模型组(P<0.05)。结论H_(2)O_(2)可抑制MC3T3-E1细胞增殖和成骨分化,低温可增强H_(2)O_(2)对MC3T3-E1细胞增殖和成骨分化的抑制作用,高温可缓解H_(2)O_(2)对细胞增殖和成骨分化的抑制作用。RUNX2、OPN和OC蛋白可能在温度调控细胞增殖和成骨分化的过程中发挥重要作用。

关键词：孵育温度氧化损伤成骨细胞 MC3T3-E1细胞细胞增殖成骨分化

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立德树人任务下基于OBE理念“旅行社计调业务”课程思政实施路径

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河北旅游职业学院学报 2024年第1期29卷 77-81页

作者：李海梅孙志新河北旅游职业学院河北化承德067000

立德树人任务下基于OBE理念“旅行社计调业务”课程思政的设计思路:基于OBE理念要求,明确“旅行社计调业务”课程思政的目标,即要培养什么样的人;然后有针对性地设计并制定相关的课程思政结构以及教学内容,并在教学中采取多样化的教学方... 详细信息

立德树人任务下基于OBE理念“旅行社计调业务”课程思政的设计思路:基于OBE理念要求,明确“旅行社计调业务”课程思政的目标,即要培养什么样的人;然后有针对性地设计并制定相关的课程思政结构以及教学内容,并在教学中采取多样化的教学方法,以充分调动学生的积极性,引导学生主动思考和讨论;紧接着是根据OBE理念采取多元化的评价方式,重点评价学生的专业能力和思政素养,以进一步明确预先设计的课程思政模式是否存在改进之处,以为培养符合立德树人要求的高素质旅行社从业人才奠定基础。

关键词：立德树人 OBE思政旅行社计调业务

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Numerical prediction of particle slip velocity in turbulence by CFD-DEM simulation

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Particuology 2023年第9期80卷 170-179页

作者： zhixin sun Xiaokang Yan Lijun Wang Xiaoheng Li Ai Wang Haijun Zhang School of Chemical Engineering China University of Mining and TechnologyXuzhou221116China School of Low-Carbon Energy and Power Engineering China University of Mining and TechnologyXuzhou221116China National Engineering Research Center of Coal Preparation and Purification China University of Mining and TechnologyXuzhou221116China School of Engineering The University of NewcastleCallaghanNSW2308Australia

Turbulent environment improves the flotation recovery of fine particles by promoting the particle–bubble collision rate,which directly depends on the particle slip ***,the existing slip velocity models are not applicable to fine particles in *** mechanism of turbulence characteristics and particle properties on the slip velocity of fine particles in turbulence was *** this study,a coupled ANSYS FLUENT and EDEM based on computational fluid dynamics(CFD)and discrete element method(DEM)were used to simulate the slip velocity of fine particles in the approximately homogenous isotropic turbulence,which was excited by the *** reliability of the used CFD-DEM simulation method was validated against the slip velocity measured by the particle image velocimetry(PIV)*** particular,the effects of the particle shapes,particle densities,and turbulence intensities on the slip velocity have been investigated with this numerical *** results show that particle shapes have no significant effect on fine particles between 37 and 225μ*** slip velocity of the spherical particles increases with the turbulence intensity and particle *** on the simulated data,a model which has a correlation coefficient of 0.95 is built by using nonlinear fitting.

关键词： Slip velocity Fine particles Turbulence CFD-DEM

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