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Anomaly Detection of Industrial Control Systems Based on Transfer Learning

Tsinghua Science and Technology 2021年第6期26卷 821-832页

作者： Weiping wang zhaorong wang Zhanfan Zhou Haixia Deng Weiliang Zhao Chunyang wang Yongzhen Guo School of Computer and Communication Engineering the Beijing Key Laboratory of Knowledge Engineering for Materials Scienceand the Institute of Artificial IntelligenceUniversity of Science and Technology BeijingBeijing 100083China Shunde Graduate School University of Science and Technology BeijingGuangzhou 528399China School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing 100083China School of Mechanical Engineering University of Science and Technology BeijingBeijing 100083China Donlinks School of Economics and Management University of Science and Technology Beijing Beijing 100083China School of Automation Beijing Institute of TechnologyBeijing 100081 China Software Testing Center Beijing 100048China.

Industrial Control Systems(ICSs)are the lifeline of a ***,the anomaly detection of ICS traffic is an important *** paper proposes a model based on a deep residual Convolution Neural Network(CNN)to prevent gradient explosion or gradient disappearance and guarantee *** developed methodology addresses two limitations:most traditional machine learning methods can only detect known network attacks and deep learning algorithms require a long time to *** utilization of transfer learning under the modification of the existing residual CNN structure guarantees the detection of unknown ***-dimensional ICS flow data are converted into two-dimensional grayscale images to take full advantage of the features of *** show that the proposed method achieves a high score and solves the time problem associated with deep learning model *** model can give reliable predictions for unknown or differently distributed abnormal data through short-term ***,the proposed model ensures the safety of ICSs and verifies the feasibility of transfer learning for ICS anomaly detection.

关键词： anomaly detection transfer learning deep learning Industrial Control System(ICS)

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Osmium isotope determination on mantle-derived peridotite xenoliths from Panshishan with N-TIMS

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Chinese Science Bulletin 1998年第7期43卷 573-575页

作者： Weidong Sun Zicheng Peng Xiachen Zhi Daogong Chen zhaorong wang Xinhua Zhou Univ Sci & Technol China Dept Earth & Space Sci Hefei 230026 Peoples R China Univ Sci & Technol China Third World Acad Sci Adv Res Ctr Earth Sci & Astron Hefei 230026 Peoples R China Chinese Acad Sci Inst Geol Lab Lithosphere Tecton Evolut Beijing 100029 Peoples R China

The 187Os/ 188Os ratios of spinel lherzolite xenoliths from Panshishan determined with N-TIMS are lower than that of the primitive mantle, which shows depleted mantle characteristics. Their positive correlation with Al-2O-3/MgO suggests that the geochemical behavior of trace elements Re and Os is similar to that of Al-2O-3 and MgO respectively during the magmatic evolution and Re-Os isotopic system is largely immune to mantle metasomatism. A model age of 2 8-3 4 Ga obtained by 187Os/ 188Os-Al-2O-3/MgO correlation might represent the homogeneous age of the mantle lithosphere beneath the area.

关键词： negative thermal ionization mass spectrometry osmium isotope mantle-derived peridotite xenolith.

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Chemical Composition of the Primitive Mantle Source of Peridotite Inclusions at Mount Lianshan, Liuhe County,Jiangsu Province

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Acta Geologica Sinica(English Edition) 1998年第2期72卷 180-190页

作者： SUN Weidong PENG Zicheng CHEN Daogong ZHI Xiachen wang zhaorong GE Ningjie Department of Earth&Space Sciences University of Science&Technology of China Advanced Centre for Earth Sciences&Astronomy The Third World Academy of SciencesHefeiAnhui Province 230026

: This paper presents a study of the major and trace element compositions of fresh mantle-derived spinel lherzolite and harzburgite inclusions from Cenozoic alkaline basalt in Mount Lianshan and Mount Panshi, Liuhe County, Jiangsu Province. An estimation is made of the contents of the major elements and some of the trace elements in the primitive mantle source region of the area, from which the authors have obtained MgO/Al2O3= 7.86. The contents of MgO and Al2O3 are also obtained as 37.58% and 4.78% respectively based on the correlation of MgO-Al2O3. Then, the contents of various elements in the primitive mantle are calculated using their regression equations with MgO, and the compositon of the primitive mantle, a basic issue in geochemistry study, is discussed on that basis.

关键词： Mount Lianshan peridotite inclusions mantle source composition of the primitive mantle

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Zero-dimensional polariton laser in a subwavelength grating-based vertical microcavity

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Light(Science & Applications) 2014年第1期3卷 383-387页

作者： Bo Zhang zhaorong wang Sebastian Brodbeck Christian Schneider Martin Kamp Sven Hofling Hui Deng Department of Physics University of MichiganAnn ArborMI 48109USA Technische Physik Physikalisches Institut and Wilhelm Conrad Roentgen Research Center for Complex Material SystemsUniversity of WuerzburgD-97074 WuerzburgGermany SUPA School of Physics and AstronomyUniversity of St AndrewsSt AndrewsKY 169SSUnited Kingdom

Semiconductor exciton–polaritons in planar microcavities form coherent two-dimensional condensates in ***,the coupling of multiple lower-dimensional polariton quantum systems,which are critical for polaritonic quantum device applications and novel cavity-lattice physics,has been limited in conventional cavity ***,we demonstrate full non-destructive confinement of polaritons using a hybrid cavity composed of a single-layer subwavelength grating mirror and a distributed Bragg ***-mode polariton lasing was observed at a chosen *** incorporation of a designable slab mirror in a conventional vertical cavity,when operating in the strong-coupling regime,enables the confinement,control and coupling of polariton gasses in a scalable *** approach may open the door to experimental implementations of polariton-based quantum photonic devices and coupled cavity quantum electrodynamic systems.

关键词： Bose–Einstein condensation microcavity photonic crystal polariton

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Os isotopic composition of the earth's primitive upper mantle

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Chinese Science Bulletin 1998年第18期43卷 1575-1579页

作者： Weidong Sun Xiachen Zhi Zicheng Peng zhaorong wang Ningjie Ge Xinhua Zhou Department of Earth and Space Sciences University of Science and Technology of China Hefei China Advanced Research Center on Earth Sciences and Astronomy University of Science and Technology of China Third World Academy of Sciences Hefei China Laboratory of Lithosphere Tectonic Evolution Institute of Geology Chinese Academy of Sciences Beijing China

The osmium isotopic ratio of 187Os/ 188Os ranging from 0.126 to 0.127 for the primitive upper mantle (PUM) is obtained according to the correlation between 187Os/ 188Os and Al 2O 3 of mantle-derived xenoliths and orogenic peridotites, which consists with Allegre and Luck’s ALM value and similar to Yin’s nuggets uniform reservoir (NUR) value. It shows that the Os isotope ratio is lower than enstatite or ondinary chondrites, similar to carbonaceous chondrites (CV3).

关键词： primitive upper mantle Os isotope mantle_derived peridotite.

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High-precision thermal ionization mass spectrometry dating of young volcanic rocks by using U-series method

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Chinese Science Bulletin 2000年第1期45卷 83-87页

作者： wang Fei PENG Zicheng CHEN Wenji wang zhaorong YANG Jiwu ZHANG Zhonglu HU Yutai Institute of Geology China Seismological BureauBeijing 100029China Department of Earth and Space Science China University of Science and TechnologyHefei 230026China Seismological Bureau of Yunnan Province Kunming 650000China

A high precision thermal ionization mass spectrometric (HP-TIMS) technique is used to determine 238U,234U,232Th,230Th concentrations and their ratios in whole rocks and minerals separated from Ouaternary Maanshan, Dayingshan and Heikongshan volcanic rocks of Tengchong volcanic field .Yunnan Province, China. The 238U-230Th isochrons are given, yielding four age values (227 ? 20) ka (D-1, Dayingshan), (79.6 ±5.5) ka (D-7, Dayingshan), (21.9 ± 3.0) ka (h-1, Heikongshan), and (7.5 ± 1.0) ka (M-1, Maanshan). The result is not only consistent with but also preciser than those measured by the K-Ar method and the alpha spectrometry U-series method, indicating that the HP-TIMS method is reliable and has high precision. Besides, a procedure of HP-TIMS analysis of young volcanic rocks in China is set up preliminarily.

关键词： high precision thermal ionization mass spectrometry U-series method young volcanic rock U-series age.

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High-precision timing of the Quaternary standard samples with thermal ionization mass spectrometry (TIMS) U-series method

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Chinese Science Bulletin 1998年第4期43卷 333-336页

作者： Peng Zicheng wang zhaorong Sun Weidong Ma Zhibang Xia Ming Zhang Chenhui Chen Wenji Zhang Zhonglu An Zhisheng Univ Sci & Technol China Dept Earth & Space Sci Hefei 230026 Peoples R China Chinese Acad Sci Inst Geol Beijing 100029 Peoples R China State Seismol Bur Inst Geol Beijing 100029 Peoples R China State Key Lab Loess & Quaternary Geol Xian 710054 Peoples R China

Two national stalagmite standard （GBW04412, GBW04413） and one international coral standard （RKM4） have been determined by using thermal ionization mass spectrometry （TIMS） method. The values of （ 234 U/ 238 U） act , （ 230 Th/ 234 U） act and age are all consistent in error range with the standard values obtained by using α spectrometry.

关键词： thermal ionization mass spectrometry (TIMS) U_series method standard samples stalagmite and coral age determination.

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High-precision U-series dating of Holocene corals from South China Sea by thermal ionization mass spectrometry(TIMS)

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Chinese Science Bulletin 1999年第10期44卷 937-941页

作者： Zhibang Ma Ming Xia Chenghui Zhang Zicheng Pen zhaorong wang Weidong Sun Zhisheng An Chinese Acad Sci Inst Geol Beijing 100029 Peoples R China Univ Sci & Technol China Dept Earth & Space Sci Hefei 230026 Peoples R China State Key Lab Loess & Quaternary Geol Xian 710054 Peoples R China

Using the isotopic diluting and thermal ionization mass spectrometric (TIMS) technique, the U-series dating procedure was established on the basis of measurement of national standard GBW04412. With this highly precise technique the Holocene corals from the South China Sea were dated. Comparison between this method and α-spectrometry was made. The results show that a thriving period of corals in the South China Sea appeared at 6 800—5 800 a BP, during which the paleosea level was the higher than at present in the Holecene.

关键词： Holocene corals reefs mass spectrometric U-series dating South China Sea.

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