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A Dynamic Probabilistic Marking Approach with Multi-Tag for Tracing ICMP-Based DoS Attacks

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Wuhan University Journal of Natural Sciences 2013年第6期18卷 484-488页

作者： chen Xiuzhen MA Jin LI Shenghong chen ken SERHROUCHNI Ahmed State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University School of Information Security Engineering Shanghai Jiao Tong University Les Laboratoires de l'Institut Galilée Université Paris 13Paris 93430 France Network and Computer Science Department Telecom ParisTech Paris 75634 France

This paper presents a dynamic probabilistic marking algorithm with multiple routing address tags, which allows the vic- tim to traceback the origin of ICMP （Internet Control Message Pro- tocol）-based direct and reflective DoS attacks. The proposed ap- proach makes full use of scalable data space of ICMP packet to achieve multiple information tags. The difference between this pro- posal and previous proposals lies in two points. First, the number of packets needed by the victim to reconstruct the attack path is greatly reduced because of three key mechanisms： multi-tag, uniform left- over probability, and tag location choice based on the module of accommodated tag numbers within a packet. Second, the true origin of both direct and reflective ICMP-based DoS attacks can be traced.

关键词： network security denial of service IP traceback dynamic probabilistic marking multi-tag

基于Hausdorff距离的光伏漏电流监测方法

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电气传动 2024年第9期54卷 90-96页

作者：韩少华毛王清葛萱许磊陈肯梁睿国网江苏省电力有限公司宿迁供电分公司江苏宿迁223800 中国矿业大学电气工程学院江苏徐州221116

与带有隔离变压器的大型光伏系统相比,分布式光伏的功率与体积较小,且为了提高工作效率,在设计时多采用非隔离型逆变器,但也因此产生了会危害配网系统安全的光伏漏电流。以单相全桥结构的光伏系统为例,详细分析了光伏漏电流的产生机理,... 详细信息

与带有隔离变压器的大型光伏系统相比,分布式光伏的功率与体积较小,且为了提高工作效率,在设计时多采用非隔离型逆变器,但也因此产生了会危害配网系统安全的光伏漏电流。以单相全桥结构的光伏系统为例,详细分析了光伏漏电流的产生机理,随后分析了光伏漏电流进入配电网后的波形特征,并在此基础上提出了一种基于Hausdorff距离的光伏漏电流监测方法,简单高效地解决了光伏漏电流监测与保护困难的问题。最后对提出的方法进行仿真分析,验证了所提方法的可行性。

关键词：非隔离型分布式光伏逆变电路漏电流监测 Hausdorff距离

Regulation of PM_(2.5)on mitochondrial damage in H9c2 cells through miR-421/SIRT3 pathway and protective effect of miR-421 inhibitor and resveratrol

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Journal of Environmental Sciences 2024年第4期138卷 288-300页

作者： Shanshan chen Wenqi chen Zhiping Li Jianwei Yue ken Kin Lam Yung Ruijin Li Institute of Environmental Science Shanxi UniversityTaiyuan 030006China Institute of Judicial Identification Techniques for Environmental Damage Shanxi University and Shanxi Unisdom Testing Technology Co.Ltd.Taiyuan 030006China Department of Biology Hong Kong Baptist UniversityHong KongChina Shanxi Yellow River Laboratory Taiyuan 030006China

Fine particulate matter(PM_(2.5))exposure is associated with cardiovascular disease(CVD)morbidity and *** are sensitive targets of PM_(2.5),and mitochondrial dysfunction is closely related to the occurrence of *** epigenetic mechanism of PM_(2.5)-triggered mitochondrial injury of cardiomyocytes is *** study focused on the mi R-421/SIRT3 signaling pathway to investigate the regulatory mechanism in cardiac mitochondrial dynamics imbalance in rat H9c2 cells induced by PM_(2.5).Results illustrated that PM_(2.5)impaired mitochondrial function and caused dynamics homeostasis ***,PM_(2.5)up-regulated mi R-421 and down-regulated SIRT3 gene expression,along with decreasing p-FOXO3a(SIRT3 downstream target gene)and p-Parkin expression and triggering abnormal expression of fusion gene OPA1 and fission gene ***,mi R-421 inhibitor(mi R-421i)and resveratrol significantly elevated the SIRT3 levels in H9c2 cells after PM_(2.5)exposure and mediated the expression of SOD2,OPA1 and Drp1,restoring the mitochondrial morphology and *** suggests that mi R-421/SIRT3 pathway plays an epigenetic regulatory role in mitochondrial damage induced by PM_(2.5)and that mi R-421i and resveratrol exert protective effects against PM_(2.5)-incurred cardiotoxicity.

关键词： Fine particulate matter Rat H9c2 cells Mitochondrial damage MiR-421 SIRT3 Resveratrol

2D IMAGE BASED SIEVING FOR PARTICLE AGGREGATE GRADATION

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Journal of Electronics(China) 2008年第2期25卷 277-282页

作者： chen ken John Zaniewski Zhao Pan Yang Ren＇er College of Information Science and Engineering Ningbo University Ningbo 315211 China College of Engineering West Virginia University WV 26506-6106 USA

Acquiring the size gradation for particle aggregates is a common practice in the granule related industry,and mechanical sieving or screening has been the normal method. Among many drawbacks of this conventional means,the major ones are time-consuming,labor-intensive,and being unable to provide real-time feedback for process control. In this letter,an optical sieving approach is introduced. The two-dimensional images are used to develop methods for inferring particle volume and sieving behavior for gradation purposes. And a combination of deterministic and probabilistic methods is described to predict the sieving behaviors of the particles and to construct the gradation curves for the aggregate sample. Comparison of the optical sieving with standard mechanical sieving shows good correlation.

关键词： Image processing Machine vision Particle images Particle gradation Particle sieving

氟硅改性丙烯酸树脂的制备及在混凝土上的抗污应用

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胶体与聚合物 2024年第2期42卷 69-71页

作者：张淼澜喻亮杨宇霆陈垦陈婉婷张群朝湖北大学材料科学与工程学院武汉430062

采用甲基丙烯酸甲酯(MMA)、甲基丙烯酸异辛酯(EMA)、γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)、丙烯酸1H,1H,2H,2H-十七氟癸酯(HDFA)为结构单体,通过自由基共聚改性制备氟硅丙烯酸多元共聚物(FEA)用于混凝土抗污性研究。对聚合物结构... 详细信息

采用甲基丙烯酸甲酯(MMA)、甲基丙烯酸异辛酯(EMA)、γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)、丙烯酸1H,1H,2H,2H-十七氟癸酯(HDFA)为结构单体,通过自由基共聚改性制备氟硅丙烯酸多元共聚物(FEA)用于混凝土抗污性研究。对聚合物结构进行表征,探究了改性聚合物的润湿性和耐沾污性。结果表明,当氟单体质量含量为60%,经聚合物处理过的混凝土具有优异的防水性能,接触角可达130.2°,此时耐污染性达到较好效果。

关键词：丙烯酸树脂防水抗污涂层

INFLUENCE OF STOCHASTIC NOISE STATISTICS ON KALMAN FILTER PERFORMANCE BASED ON VIDEO TARGET TRACKING

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Journal of Electronics(China) 2010年第3期27卷 420-427页

作者： chen ken M. R. Napolitano Zhang Yun Li Dong College of Information Science and Engineering Ningbo University Zhejiang 315211 China College of Engineering West Virginia University WV 26506 USA

The system stochastic noises involved in Kalman filtering are preconditioned on being ideally white and Gaussian distributed. In this research, efforts are exerted on exploring the influence of the noise statistics on Kalman filtering from the perspective of video target tracking quality. The correlation of tracking precision to both the process and measurement noise covariance is investigated; the signal-to-noise power density ratio is defined; the contribution of predicted states and measured outputs to Kalman filter behavior is discussed; the tracking precision relative sensitivity is derived and applied in this study case. The findings are expected to pave the way for future study on how the actual noise statistics deviating from the assumed ones impacts on the Kalman filter optimality and degra-dation in the application of video tracking.

关键词： Stochastic noise Kalman filter performance Video tracking quality Noise statistics

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汽车轮胎橡胶摩擦试验研究

机械工程学报 2004年第10期40卷 175-180页

作者：郭孔辉庄晔 chen Shih-ken Lin William 吉林大学汽车动态模拟国家重点实验室长春130025 通用汽车公司研发中心

介绍了所开发的轮胎橡胶摩擦试验台,提出了轮胎橡胶摩擦试验方法。在该试验台上进行了干水泥路面、冰面等工况下的轮胎橡胶块摩擦试验,对所得试验结果进行了分析、处理。初步掌握了路面、温度、垂直压力和滑移速度等因素对摩擦因数的影... 详细信息

介绍了所开发的轮胎橡胶摩擦试验台,提出了轮胎橡胶摩擦试验方法。在该试验台上进行了干水泥路面、冰面等工况下的轮胎橡胶块摩擦试验,对所得试验结果进行了分析、处理。初步掌握了路面、温度、垂直压力和滑移速度等因素对摩擦因数的影响。在此基础上把动摩擦的概念引入轮胎半经验模型,对现有模型进行了改进。提出了应用轮胎低速试验数据预测高速下轮胎特性的方法。

关键词：轮胎橡胶摩擦试验轮胎模型汽车

Fatal Decision Rings Alarm Bell

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China & The World Cultural Exchange 2000年第6期66卷 42-43页

作者： chen ken

The feature film Fatal Decision, pro-duced by the Shanghai Film Studioin 2000, evoked a warm response from thegeneral public and top Chinese leaders as soonas it was released. Chinese President JiangZemin highly prais... 详细信息

关键词： Fatal Decision Rings Alarm Bell

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轮胎胎面橡胶-冰面摩擦试验方法研究

摩擦学学报 2005年第3期25卷 234-237页

作者：郭孔辉庄晔 chen Shih-ken LIN William 吉林大学汽车动态模拟国家重点实验室吉林长春130025 General Motor R&D Center

基于一种新开发的轮胎胎面橡胶摩擦试验机,建立了轮胎和整车与冰面间的模拟摩擦试验手段,提出了在高滑移速度段的瞬时试验法和低滑移速度段的连续采样试验法;分别在不同滑移速度、压力、温度下针对轮胎胎面胶块与冰面进行了摩擦试验,并... 详细信息

基于一种新开发的轮胎胎面橡胶摩擦试验机,建立了轮胎和整车与冰面间的模拟摩擦试验手段,提出了在高滑移速度段的瞬时试验法和低滑移速度段的连续采样试验法;分别在不同滑移速度、压力、温度下针对轮胎胎面胶块与冰面进行了摩擦试验,并对试验结果进行了模型拟合和分析.结果表明:作为轮胎主要组成部分的橡胶表现出很特殊的摩擦特性,其并不符合库仑摩擦定律;橡胶轮胎的机械特性在很大程度上取决于橡胶的摩擦特性,在一些极限工况下尤其如此;相关的橡胶摩擦实验研究对轮胎力学特性的研究具有重要的参考价值.

关键词：汽车轮胎橡胶摩擦试验轮胎模型