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FlowGANAnomaly: Flow-Based Anomaly Network Intrusion Detection with Adversarial Learning

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Chinese Journal of Electronics 2024年第1期33卷 58-71页

作者： Zeyi LI Pan wang Zixuan wang School of Computer Science Nanjing University of Posts and Telecommunications School of Modern Posts Nanjing University of Posts and Telecommunications School of Internet of Things Nanjing University of Posts and Telecommunications

In recent years, low recall rates and high dependencies on data labelling have become the biggest obstacle to developing deep anomaly detection(DAD) techniques. Inspired by the success of generative adversarial networks(GANs) in detecting anomalies in computer vision and imaging, we propose an anomaly detection model called Flow GANAnomaly for detecting anomalous traffic in network intrusion detection systems(NIDS). Unlike traditional GAN-based approaches, which are composed of a flow encoder, a convolutional encoder-decoder-encoder, a flow decoder and a convolutional encoder, the architecture of this model consists of a generator(G) and a discriminator(D).Flow GANAnomaly maps the different types of traffic feature data from separate datasets to a uniform feature space,thus can capture the normality of network traffic data more accurately in an adversarial manner to mitigate the problem of the high dependence on data labeling. Moreover, instead of simply detecting the anomalies by the output of D, we proposed a new anomaly scoring method that integrates the deviation between the output of two Gs’ convolutional encoders with the output of D as weighted scores to improve the low recall rate of anomaly detection. We conducted several experiments comparing existing machine learning algorithms and existing deep learning methods(Auto Encoder and VAE) on four public datasets(NSL-KDD, CIC-IDS2017, CIC-DDo S2019, and UNSW-NB15). The evaluation results show that Flow GANAnomaly can significantly improve the performance of anomaly-based NIDS.

关键词： Deep learning Machine learning algorithms Computational modeling Network intrusion detection Imaging Telecommunication traffic Generative adversarial networks

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Sub-Nyquist sampling-based wideband spectrum sensing:a compressed power spectrum estimation approach

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Frontiers of Computer Science 2024年第2期18卷 139-145页

作者： Jilin wang Yinsen HUANG Bin wang National Key Laboratory of Science and Technology on Communications University of Electronic Science and Technology of ChinaChengdu 611731China

In this paper,we introduce a sub-Nyquist sampling-based receiver architecture and method for wideband spectrum *** of recovering the original wideband analog signal,the proposed method aims to directly reconstruct the power spectrum of the wideband analog signal from sub-Nyquist *** that power spectrum alone is sufficient for wideband spectrum *** only the covariance matrix of the wideband signal is needed,the proposed method,unlike compressed sensing-based methods,does not need to impose any sparsity requirement on the frequency *** proposed method is based on a multi-coset sampling *** exploiting the inherent sampling structure,a fast compressed power spectrum estimation method whose primary computational task consists of fast Fourier transform(FFT)is *** results are presented to show the effectiveness of the proposed method.

关键词： wideband spectrum sensing sub-Nyquist multicoset sampling FCPSE

Toward tunable shape memory effect of NiTi alloy by grain size engineering:A phase field study

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Journal of Materials Science & Technology 2024年第1期168卷 276-289页

作者： Bo Xu Chong wang Qingyuan wang Failure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan ProvinceSichuan UniversityChengdu 610065China Department of Mechanical Science and Engineering College of Architecture and EnvironmentSichuan UniversityChengdu 610065China Key Laboratory of Deep Underground Science and Engineering (Sichuan University)Ministry of EducationChengdu 610065China

The inelastic deformations of shape memory alloys(SMAs)always show poor controllability due to the avalanche-like martensite transformation,and the effective control for the deformation of precision de-vices has been not yet *** this work,the phase field method was used to investigate the shape memory effects(SMEs)of NiTi SMAs undergoing grain size(GS)engineering,to obtain tunable one-way and stress-assisted two-way SMEs(OWSME and SATWSME).The OWSME and SATWSME of the systems with various gradient-nanograin structures and bimodal grain structure,as well as that with geometric gradients were *** simulated results indicate that due to the GS dependences of martensite transformation and reorientation,the occurrence and expansion of martensite reorientation,martensite transformation and its reverse can be efficaciously controlled via the GS *** combining the GS engineering and geometric gradient design,since the effects of GS and stress gradient can be su-perimposed or competing,and the responses of martensite reorientation,martensite transformation and its reverse to this are different,the OWSME and SATWSME of the geometrically graded systems with various nanograin structures can exhibit different improvements in *** short,the reorienta-tion hardening modulus during OWSME is increased and the transformation temperature window during SATWSME is widened by GS engineering,indicating the improved controllability of *** optimal GS engineering schemes revealed in this work provide the basic reference and guidance for designing tun-able SMEs and producing NiTi-based driving devices catering to desired functional performance in various engineering fields.

关键词： Phase field NiTi Shape memory effect Grain size engineering Geometric gradient

A novel triple periodic minimal surface-like plate lattice and its data-driven optimization method for superior mechanical properties

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Applied Mathematics and Mechanics(English Edition) 2024年第2期45卷 217-238页

作者： Yanda wang Yanping LIAN Zhidong wang Chunpeng wang Daining FANG State Key Laboratory for Turbulence and Complex Systems&Center for Applied Physics and Technology College of EngineeringPeking UniversityBeijing 100871China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China

Lattice structures can be designed to achieve unique mechanical properties and have attracted increasing attention for applications in high-end industrial equipment,along with the advances in additive manufacturing(AM)*** this work,a novel design of plate lattice structures described by a parametric model is proposed to enrich the design space of plate lattice structures with high connectivity suitable for AM *** parametric model takes the basic unit of the triple periodic minimal surface(TPMS)lattice as a skeleton and adopts a set of generation parameters to determine the plate lattice structure with different topologies,which takes the advantages of both plate lattices for superior specific mechanical properties and TPMS lattices for high connectivity,and therefore is referred to as a TPMS-like plate lattice(TLPL).Furthermore,a data-driven shape optimization method is proposed to optimize the TLPL structure for maximum mechanical properties with or without the isotropic *** this method,the genetic algorithm for the optimization is utilized for global search capability,and an artificial neural network(ANN)model for individual fitness estimation is integrated for high efficiency.A set of optimized TLPLs at different relative densities are experimentally validated by the selective laser melting(SLM)fabricated *** is confirmed that the optimized TLPLs could achieve elastic isotropy and have superior stiffness over other isotropic lattice structures.

关键词： lattice structure triple periodic minimal surface(TPMS) plate lattice structural optimization machine learning

移动工作台位置控制系统变论域模糊PID研究

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现代制造工程 2022年第1期 119-124页

作者：朱桂英师国辉侯志辉王毅颖河北工程大学机械与装备工程学院邯郸056038

单机多工位锻压机的移动工作台位置控制系统是多变量的非线性耦合系统,常规PID控制和模糊PID控制难以完全适应复杂系统变化,满足系统控制要求。为了解决这一问题,在模糊PID控制的基础上加入变论域模块,改变模块中的论域伸缩因子,使模糊... 详细信息

单机多工位锻压机的移动工作台位置控制系统是多变量的非线性耦合系统,常规PID控制和模糊PID控制难以完全适应复杂系统变化,满足系统控制要求。为了解决这一问题,在模糊PID控制的基础上加入变论域模块,改变模块中的论域伸缩因子,使模糊控制的论域随系统条件变化而调整,最终整定出满足系统控制要求的PID参数。对移动工作台位置控制环节建立了数学模型,并在Matlab/Simulink中进行了控制系统建模及仿真分析。结果表明:相比常规PID控制和模糊PID控制,使用变论域模糊PID控制的系统具有良好的动静态性能,在响应速度、过渡过程时间及稳态精度等方面具有更好的优越性,适合在复杂的非线性耦合控制系统中使用。

关键词：移动工作台位置控制系统变论域模糊PID 系统仿真

Adaptive Barrier-Lyapunov-Functions Based Control Scheme of Nonlinear Pure-Feedback Systems with Full State Constraints and Asymptotic Tracking Performance

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Journal of Systems Science & Complexity 2024年第3期37卷 965-984页

作者： NIU Ben wang Xiaoan wang Xiaomei wang Xinjun LI Tao Faculty of Electronic Information and Electrical Engineering Dalian University of TechnologyDalian 116024China School of Information Science and Engineering Shandong Normal UniversityJinan 250014China School of Mathematics Southeast UniversityNanjing 211189China School of Automation Nanjing University of Information Science and TechnologyNanjing 210044China

In this paper,the authors propose an adaptive Barrier-Lyapunov-Functions(BLFs)based control scheme for nonlinear pure-feedback systems with full state *** to the coexist of the non-affine structure and full state constraints,it is very difficult to construct a desired controller for the considered *** to the mean value theorem,the authors transform the pure-feedback system into a system with strict-feedback structure,so that the well-known backstepping method can be ***,in the backstepping design process,the BLFs are employed to avoid the violation of the state constraints,and neural networks(NNs)are directly used to online approximate the unknown packaged nonlinear *** presented controller ensures that all the signals in the closed-loop system are bounded and the tracking error asymptotically converges to ***,it is shown that the constraint requirement on the system will not be violated during the ***,two simulation examples are provided to show the effectiveness of the proposed control scheme.

关键词： Asymptotic tracking control barrier Lyapunov functions full state constraints nonlinear pure-feedback systems

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未缴纳出资股权转让的责任规则构建

环球法律评论 2024年第1期46卷 42-46,47-58页

作者：林一英全国人大法工委经济法室

股权转让包含股权作为财产权属的变更和受让人股东资格的取得。股权转让产生权利义务概括转移至受让人的法律效果。对于未缴纳出资股权,记载于股东名册的受让人是第一顺位的出资义务人。基于股东有限责任和出资义务的法定性,由转让人对... 详细信息

股权转让包含股权作为财产权属的变更和受让人股东资格的取得。股权转让产生权利义务概括转移至受让人的法律效果。对于未缴纳出资股权,记载于股东名册的受让人是第一顺位的出资义务人。基于股东有限责任和出资义务的法定性,由转让人对未届出资期的股权承担补充责任,有利于通过市场机制抑制出资不足的风险,降低司法成本。对于已届出资期的,转让人应当与受让人承担连带责任。经相关利益主体同意不能实现资本充实目的,且成本高、效率低。根据转让人主观状态来确定责任,举证难、司法成本高、易被规避。转让已届出资期股权的,公司要求转让人承担连带责任不以对受让人失权为前提。转让未届出资期股权的,符合股东出资加速到期条件的,公司应当首先要求受让人承担责任,仅在受让人不能承担责任的,才能依次要求转让人承担补充责任。

关键词：未缴纳出资股权股权转让连带责任补充责任

芬兰“托幼一体化”管理体制的实践经验及其对我国的启示

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成都师范学院学报 2022年第12期38卷 102-108页

作者：王伊莹蔡迎旗华中师范大学教育学院湖北武汉430079

芬兰很早就进行了“托幼一体化”的改革实践并取得了较大成效,通过构建一体化政府管理部门、整合早期教育和保育课程指南、统一保教师资队伍、整合利用家长和社区资源来实现“托幼一体化”,这为我国探索“托幼一体化”道路提供了有益借... 详细信息

芬兰很早就进行了“托幼一体化”的改革实践并取得了较大成效,通过构建一体化政府管理部门、整合早期教育和保育课程指南、统一保教师资队伍、整合利用家长和社区资源来实现“托幼一体化”,这为我国探索“托幼一体化”道路提供了有益借鉴。借鉴芬兰的实践经验,我国可以通过以下方法推进“托幼一体化”进程:改革“双轨制”模式,构建统一管理体制;整合保育教育课程,构建统一课程体系;严把师资入口关,多举措增强师资队伍;鼓励多主体参与,多途径扩大资源供给。

关键词：芬兰托幼一体化托育服务普惠托育服务婴幼儿照护早期教育管理体制

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社会经济地位与全因死亡风险队列研究

中国预防医学杂志 2023年第9期24卷 971-978页

作者：林深荣王艺颖李雪娇刘涛贵州大学医学院贵州贵阳550025 贵州省疾病预防控制中心慢性病防治研究所

目的探讨社会经济地位(socioeconomic status,SES)对全死因的影响。方法采用分层整群随机抽样方法,于2010年对抽取的贵州省12个县(市、区)≥18岁常住居民进行基线调查,于2016—2020年对该队列所有人群进行随访;SES由家庭人均年收入、个... 详细信息

目的探讨社会经济地位(socioeconomic status,SES)对全死因的影响。方法采用分层整群随机抽样方法,于2010年对抽取的贵州省12个县(市、区)≥18岁常住居民进行基线调查,于2016—2020年对该队列所有人群进行随访;SES由家庭人均年收入、个人文化程度和职业构成,分别按照等级次序由低到高进行赋分(1~4分),计算参与者SES综合得分,并按四分位数将SES分为4个等级。运用Cox比例风险回归模型来分析SES对全死因的影响。结果共调查9280人,删除失访及SES信息缺失者,最终共纳入分析5206人。中位随访6.45年,在随访期间内共死亡98例。多因素Cox回归结果显示,家庭人均年收入在5121~0.05)。SES综合得分在7~8、≥9分人群死亡风险分别为SES综合得分<6分人群的0.50倍(HR=0.50,95%CI:0.27~0.90)、0.27倍(HR=0.27,95%CI:0.11~0.63),随着SES提高,死亡风险呈逐渐降低趋势(P_(趋势)<0.01)。亚组分析结果显示,SES对人群全死因的影响存在明显性别、地区差异。随着男性SES的提高,死亡风险呈逐渐降低趋势(P_(趋势)<0.01),而女性SES与全因死亡风险无关;在农村人口中,随着SES提高,死亡风险呈逐渐降低趋势(P_(趋势)<0.01),而在城市人口中未发现SES与成人死亡风险存在关联。结论SES与全因死亡风险成负相关,对农村、男性人群影响更为显著。

关键词：社会经济地位全因死亡率队列研究