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Research on DoS Attack Detection Method of Modbus TCP in OpenPLC

Journal of Computer and Communications 2021年第7期9卷 73-90页

作者： Tongxin Li Yong Wan Cunming Zou Yingjie Tian Lin Zhou Yiwen Zhu College of Science Shanghai University of Electric Power Shanghai China National Quality Supervision and Testing Center of Security Products for Network and Information Systems The Third Research Institute of Ministry of Public Security Shanghai China Power big data Center State Grid Shanghai Municipal Electric Power Company Electric Power Research Institute Shanghai China Shanghai Cloud Sword Information Technology Co. Ltd. Shanghai China

With the development of new information technologies such as cloud computing, Internet of Things, and mobile Internet of Things, Industry 4.0, Smart Manufacturing and Made in China 2025 have been proposed as the main content of the development of the next industrial revolution. In order to realize these projects with the common characteristics of intelligence, service, and green, a new manufacturing model, digital twin, is proposed, which combines the digital twin with industrial systems, that is, the industrial control virtualization system. However, due to the frequent occurrence of industrial control system security incidents in recent years, the industrial control virtualization system is vulnerable to attacks. The industrial control system is huge and cumbersome. Once attacked, it will cause consequences that affect the whole body. In response to this problem, this article carried out a research on DoS attack detection methods for Modbus TCP in OpenPLC, using OpenPLC as a tool for industrial control system virtualization, building a digital twin system with Raspberry Pi, and launching DoS attacks on the system, combined with Snort Intrusion detection is carried out, and the experimental results show that the built digital twin system can detect DoS attacks in OpenPLC.

关键词： Digital Virtualization Communication Protocol Vulnerability OpenPLC Snort

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Characteristics and fate behavior of environmentally persistent free radicals in atmospheric particulate matter

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地球环境学报 2024年第4期15卷 596-611页

作者： WANG Xueying CUI Long XUE Yonggang HO Kinfai HUANG Yu State Key Laboratory of Loess and Quaternary Geology Key Laboratory of Aerosol Chemistry and PhysicsInstitute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China University of Chinese Academy of Sciences Beijing 100049China The Jockey Club School of public Health and Primary Care The Chinese University of Hong KongHong KongChina CAS Center for Excellence in Quaternary Science and Global Change Xi’an 710061China

Background,aim,and scope Environmentally persistent free radicals(EPFRs)have received significant attention due to their longer lifetime and stable existence in various *** strong environmental migration ability of particulate matter allows EPFRs to migrate over long-distance transport,thereby impacting the quality of the local atmospheric ***,EPFRs can also adhere to atmospheric particles and interact with typical gaseous pollutants to affect atmospheric chemical *** can produce some reactive organic species,promoting oxidative stress in the human body,damaging biological macromolecules and ultimately affecting the organism *** are considered as a novel type of pollutant that affects human *** their significance,there are few literatures available on the characteristics and fate behaviors of EPFRs up to ***,supplemental reviews are crucial for providing comprehensive understanding of *** and methods This review summarizes the characteristics of EPFRs in particulate matter,outlines the generation mechanism and influencing factors of EPFRs,and the impacts of EPFRs on environmental quality and organism *** The content of EPFRs in particulate matter ranges from 1017 to 1020 spins∙g−*** to the strong mobility of atmospheric particulate matter,the long-term exposure to high levels of EPFRs may aggravate the impact of particulate matter on human *** interaction between EPFRs and typical gaseous pollutants can alter their fate and influence atmospheric chemical *** are mainly produced by transition metal elements and substituted aromatic hydrocarbons through electron ***,the chemical bond rupture of organic substances through heat treatment or ultraviolet radiation can also produce EPFRs,and heterogeneous reactions are capable producing them as *** production of EPFRs is not only influenced by transition metal elements and precurso

关键词： particulate matter(PM) environmentally persistent free radicals(EPFRs) formation mechanism influencing factors

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Effectiveness and safety of Shenmai injection in treatment of shock:a Meta-analysis

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Journal of Traditional Chinese Medicine 2018年第2期38卷 155-166页

作者： Li Xiaoli Shen Yi He Fan Zhu Yinchao Li Fudong Department of Gynecology the Second Affiliated Hospital of Zhejiang University School of Medicine Department of Epidemiology and Health Statistics School of Public HealthZhejiang University Department of public Health Surveillance and Advisory Zhejiang Provincial Center for Disease Control and Prevention institute of Non-Communicable Disease Control and Prevention Ningbo Municipal Center for Disease Control and Prevention

OBJECTIVE:To evaluate the effectiveness and safety of Shenmai injection for ***: Randomized controlled trials(RCTs)that evaluated the therapeutic effect of Shenmai injection on shock(including septic shock, cardiogenic shock, hypovolemic shock, neurogenic shock and anaphylactic shock) were included in this analysis. The major electronic databases were searched until May 2015. The methodological quality of the trials was assessed according to the Cochrane Handbook. Review Manager 5.3 and Stata 12.0 software were applied for data ***: Thirty RCTs involving 2038 participants were included. The methodological quality of the trials was generally passable. The combined use of Shenmai injection and conventional medicine was significantly more effective at managing shock compared to conventional medicine alone in the outcomes of total effective rate [risk ratio(RR 1.25,95% confidence interval(CI) 1.18 to 1.31] and mortality rate [risk difference(RD)-0.10, 95% CI-0.17 to-0.02]. Likewise, improvements were observed in other metrics. Three trials reported adverse events, but no trial reported serious adverse ***: Our results indicated the potential effectiveness of Shenmai injection combined with conventional medicine treatment for shock. However, further rigorously designed trials are needed to collect and weigh up all the evidence for the use of Shenmai injection.

关键词： Shock Meta-analysis Randomized con-trolled trial Shenmai injection

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IMPLEMENTATION OF LOCALISED REMOTE UA IN MHS

IMPLEMENTATION OF LOCALISED REMOTE UA IN MHS

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International Conference on Communication Technology(ICCT’94)

作者： Chen Jinzhang Gao Yu data Communication Technology Research institute

＜正＞This paper introduces the basic concept of *** UA architecture and Chinese localisation is *** of implementation and localisation of remote UA in X.400 MHS system is also presented.

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Ecological Remediation Measures for Non-point Source Pollution Based on Source-Sink Landscape Theory: A Case Study of Huanghou Basin

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Journal of Landscape Research 2024年第2期16卷 72-76页

作者： WANG Hao XIAO Shizhen School of Karst Science Guizhou Normal University/State Engineering Technology Institute for Karst Desertification ControlGuiyangGuizhou 550001China

The growth of society and population has led to a range of water pollution *** these,non-point source pollution assessment and treatment pose a particular challenge due to its formation *** has become a focal point and challenge in water pollution treatment *** study area for this research was the Huanghou basin in Guizhou Province,southwest *** land use type of the basin was analyzed using remote sensing technology,and water quality data was collected by distributing points throughout the basin,based on source-sink landscape *** distribution map of the basin’s source-sink landscape and the results of water quality data accurately and efficiently identified the areas with high risk of non-point source pollution in the western and southwestern residential and agricultural areas of the upper ***,a strategy of“increasing sinks and decreasing sources”was *** strategy was implemented at both macro and micro levels to address non-point source pollution in the basin using ecological remediation *** work to control karst rocky desertification should continue at a macro *** rocky desertification area in the basin should gradually transform into grassland and forested land,while increasing the overall area of the sink *** restoration techniques,such as slope planting,riparian zone vegetation restoration,increasing plant abundance,and restoring aquatic plants,can effectively control non-point source pollution at the micro *** to traditional control methods,this remediation strategy focuses on source and process *** is more effective and does not require large-scale water pollution control projects,which can save a lot of environmental control funds and management ***,it has greater research significance and application value.

关键词： Source-sink landscape theory Non-point source pollution Ecological restoration Rocky desertification control Karst basin

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Integration Technology of Micro-LED for Next-Generation Display

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Research 2023年第2期2023卷 389-413页

作者： Dingbo Chen Yu-Chang Chen Guang Zeng David WeiZhang Hong-Liang Lu State Key Laboratory of ASIC and System Shanghai lnstitute of Inteligent Electronics&SystemsSchoolof MicroelectronicsFudan UniversityShanghai 200433China Jia Shan Fudan institute jaxingZhejang Province 314100China Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai Institute Communication and Data ScienceShanghai UniversityShanghai 200444China

Inorganic micro light-emitting diodes(micro-LEDs)based on II-V compound semiconductors have been widely studied for self-emissive *** chips to applications,integration technology plays an indispensable role in micro-L... 详细信息

关键词： LED diodes LEDs

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The occurrence characteristics of oil in shales matrix from organic geochemical screening data and pore structure properties:An experimental study Author links open overlay panel

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Petroleum Science 2024年第1期21卷 1-13页

作者： Zi-Zhi Lin Jun-Qian Li Shuang-Fang Lu Qin-Hong Hu Peng-Fei Zhang Jun-Jie Wang Qi Zhi Hong-Sheng Huang Na Yin Yue Wang Tian-Chen Ge National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580ShandongChina School of Geosciences China University of Petroleum(East China)Qingdao 266580ShandongChina Sanya Offshore Oil&Gas Research institute Northeast Petroleum UniversitySanya 572025HainanChina College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590ShandongChina

The occurrence characteristics of shale oil are of great significance to the movability of shale *** this study,the occurrence characteristics of oil in the shale matrix at Funing Formation shale in Subei Basin were quantitatively evaluated by organic geochemistry and microscopic pore structure characterization *** Multiple Isothermal Stages Pyrolysis(MIS)experiment results show that the content of total oil,adsorbed oil,and free oil in the shales are 3.15-11.25 mg/g,1.41-4.95 mg/g,and 1.74-6.51 mg/g,*** which the silicon-rich shale has the best *** relative content of free oil shows an increasing trend in pores with pore diameters greater than 3 *** the relative content of free oil reaches 100%,the pore size of silicon-rich shale is about 200 nm,while that of calcium-rich shale,clay-rich shale,and siliceous mixed shale is about 10 *** occurrence law of adsorbed oil is opposite to that of free oil,which indicates that shale oil will occur in the pores and fractures in a free state in a more extensive pore size range(>200 nm).This study also enables us to further understand the occurrence characteristics of shale oil under the interaction of occurrence state and occurrence space.

关键词： Shale oil Occurrence characteristics Sequential solvent extraction Low-temperature nitrogen adsorption Funing Formation Dongtai Depression

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Report for Type 2 Bayes-Fuzzy Estimation in No-data Problem

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Applied Mathematics 2024年第1期15卷 46-50页

作者： Houju Hori Jr. Kazuhisa Takemura Yukio Matsumoto Nara Cmmunity Tsubakikishi Shrine Nara Japan Department of Psychology Waseda University Tokyo Japan The institute of Mathematical Statistics Tachikawa Japan

It is well known that the system (1 + 1) can be unequal to 2, because this system has both observation error and system error. Furthermore, we must provide our mustered service within our cool head and warm heart, where two states of nature are existing upon us. Any system is regarded as the two-dimensional variable error model. On the other hand, we consider that the fuzziness is existing in this system. Though we can usually obtain the fuzzy number from the possibility theory, it is not fuzzy but possibility, because the possibility function is as same as the likelihood function, and we can obtain the possibility measure by the maximal likelihood method (i.e. max product method proposed by Dr. Hideo Tanaka). Therefore, Fuzzy is regarded as the only one case according to Vague, which has both some state of nature in this world and another state of nature in the other world. Here, we can consider that Type 1 Vague Event in other world can be obtained by mapping and translating from Type 1 fuzzy Event in this world. We named this estimation as Type 1 Bayes-Fuzzy Estimation. When the Vague Events were abnormal (ex. under War), we need to consider that another world could exist around other world. In this case, we call it Type 2 Bayes-Fuzzy Estimation. Where Hori et al. constructed the stochastic different equation upon Type 1 Vague Events, along with the general following probabilistic introduction method from the single regression model, multi-regression model, AR model, Markov (decision) process, to the stochastic different equation. Furthermore, we showed that the system theory approach is Possibility Markov Process, and that the making decision approach is Sequential Bayes Estimation, too. After all, Type 1 Bays-Fuzzy estimation is the special case in Bayes estimation, because the pareto solutions can exist in two stochastic different equations upon Type 2 Vague Events, after we ignore one equation each other (note that this is Type 1 case), we can obtain both its

关键词： Bayes-Fuzzy Estimation Possibility Markov Process Possibility Reserved Judgement

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Evaluation of diagnostic ratios of medium and serious weathered oils from five different oil sources

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Acta Oceanologica Sinica 2016年第4期35卷 1-8页

作者： HE Shijie WANG Chuanyuan LI Yantai YU Hongjun HAN Bin School of Resources and Environmental Engineering Ludong University Yantai 264025 China Yantai institute of Coastal Zone Research Chinese Academy of Sciences Yantai 264003 China University of Chinese Academy of Sciences Beijing 100049 China institute of public Administration Shandong Economic University Jinan 250014 China First institute of Oceanography State Oceanic Administration Qingdao 266061 China

Laboratory experiments were conducted to simulate oil weathering process, a medium to long term weathering process for 210-d, using samples collected from five different oil resources. Based on relative deviation and repeatability limit analysis about indexes of these samples, the results show there had been significant changes in diagnostic ratios among the initial and weathered samples of different oils during this process. Changes of selected n-alkane diagnostic ratios of all oil samples displayed more obviously than diagnostic ratios of terpanes,steranes and PAHs in this process. Almost all selected diagnostic ratios of terpanes, steranes and PAHs can be efficiently used in tracking sources of hydrocarbon pollution, differentiating from the n-alkane diagnostic *** these efficient diagnostic ratios, only four ratios maintained good stability in the weathering processes and are more suitable because their relative deviation（RSD） are lower than 5%.

关键词： identification of spilled oils medium to long term weathering process simulation experiment biomarker ratios

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Vehicle-to-Infrastructure Channel Characterization in Urban Environment at 28 GHz

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China Communications 2019年第2期16卷 36-48页

作者： Longhe Wang Bo Ai Danping He Ke Guan Jiayi Zhang Junhyeong Kim Zhangdui Zhong State Key Laboratory of Rail Traffic Control and safety Beijing Jiaotong University Beijing Engineering Research Center of High-speed Railway Broadband Mobile Communications Future Mobile Communication Research Division Electronics and Telecommunications Research Institute School of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST)

Both ultra-reliable low latency and high-data-rate communications are required by connective vehicles. Millimeter wave(mm Wave) with large bandwidth is a key technology to support high-data-rate communications. In this paper, the 28 GHz wideband vehicle-to-infrastructure channel is characterized for the urban environment in a major street in Manhattan. The deployment of the transmitter and the receiver, as well as the traffic models, are selected by considering the recommendation by 3GPP TR 37.885. Ray tracing simulator with calibrated electromagnetic parameters is employed in this work to practically conduct intensive simulations. The 3D environment model is reconstructed from OpenStreetMap. The power delay profile, path loss, root-meansquare delay spread, K-factor and so on, are extracted from the calibrated simulation results. The evolution of the parameters, as well as their statistical properties, are analyzed and modeled. The work of this paper helps the researchers understand the propagation channel for designing mmWave technologies and communication system in a similar scenario.

关键词： channel characterization mmWave channel ray tracing urban environment vehicular communication

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