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Detection and Defense Method Against False Data Injection Attacks for Distributed Load Frequency Control System in Microgrid

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 913-924页

作者： Zhixun Zhang Jianqiang Hu Jianquan Lu Jie Yu Jinde Cao Ardak Kashkynbayev the School of Cyber science and Engineering Southeast UniversityNanjing 210096China the School of Mathematics Southeast UniversityNanjing 211189China the School of Electronic Information and Electrical Engineering Chengdu UniversityChengdu 610106China the Yonsei Frontier Laboratory Yonsei UniversitySeoul 03722South Korea School of Electrical Engineering Southeast UniversityNanjing 210096China the Department of Mathematics Nazarbayev UniversityNur-Sultan 010000Kazakhstan

In the realm of microgrid(MG),the distributed load frequency control(LFC)system has proven to be highly susceptible to the negative effects of false data injection attacks(FDIAs).Considering the significant responsibility of the distributed LFC system for maintaining frequency stability within the MG,this paper proposes a detection and defense method against unobservable FDIAs in the distributed LFC ***,the method integrates a bi-directional long short-term memory(Bi LSTM)neural network and an improved whale optimization algorithm(IWOA)into the LFC controller to detect and counteract ***,to enable the Bi LSTM neural network to proficiently detect multiple types of FDIAs with utmost precision,the model employs a historical MG dataset comprising the frequency and power ***,the IWOA is utilized to optimize the proportional-integral-derivative(PID)controller parameters to counteract the negative impacts of *** proposed detection and defense method is validated by building the distributed LFC system in Simulink.

关键词： Microgrid load frequency control false data injection attack bi-directional long short-term memory(BiLSTM)neural network improved whale optimization algorithm(IWOA) detection and defense

Twisting theory for weak Hopf algebras

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Applied Mathematics(A Journal of Chinese Universities) 2008年第1期23卷 91-100页

作者： CHEN Ju-zhen ZHANG Yan WANG Shuan-hong Dept. of Math. Southeast Univ. Nanjing 210096 China.

The main aim of this paper is to study the twisting theory of weak Hopf algebras and give an equivalence between the （braided） monoidal categories of weak Hopf bimodules over the original and the twisted weak Hopf a... 详细信息

关键词： weak Hopf algebra weak Hopf bimodule twisting theory.

Selective growth of tin whiskers from its alloys on Ti_(2)SnC

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Journal of Materials science & Technology 2020年第19期54卷 206-210页

作者： Jingwen Tang Peigen Zhang Yushuang Liu Chengjie Lu Yan Zhang Wei He Wubian Tian Wei Zhang Zhengming Sun Jiangsu Key Laboratory of Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China

The spontaneous growth of metal whiskers has been investigated for more than 70 ***,there is still no agreement on its growth mechanism,and moreover,new characteristics of this whiskering phenomenon continue to *** this study,Ti_(2)SnC is found to be capable of extracting Sn out of its alloys(Sn Bi,Sn Ag)by selectively growing Sn whiskers,and the Sn whiskers share the features of the traditional whiskers on platings and *** the Ti_(2)SnC substrate with Ti C or Si C,under the same conditions,however,the selective growth of Sn whisker does not happen,which means Ti_(2)SnC plays a critical role in *** on the unique crystal structure of Ti_(2)SnC,active Sn atoms diffusing through the basal planes of Ti_(2)SnC is proposed to explain the *** driving force is suggested to be the high interfacial energy between Ti_(2)SnC and *** study is of importance to further understand the growth mechanism of metallic whiskers,and it may be also possible to be harnessed to develop paradigm-shifting technologies of metal purification and metallic whisker/nanowire preparation.

关键词： Tin whisker Selectivity Ti_(2)SnC Tin alloy

Synergistic Effect of Metal Doping and Tethered Ligand Promoted High-Selectivity Conversion of CO_(2)to C_(2)Oxygenates at Ultra-Low Potential

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Energy & Environmental Materials 2022年第3期5卷 892-898页

作者： Xiaowan Bai Li Shi Qiang Li Chongyi Ling Yixin Ouyang Shiyan Wang Jinlan Wang School of Physics Southeast UniversityNanjing 211189China

Effectively controlling the selectivity of C_(2) oxygenates is desirable for electrocatalytic CO_(2) *** catalyst has been considered as the most potential for reducing CO_(2) to C_(2) products,but it still suffers from low C_(2) selectivity,high overpotential,and competitive hydrogen evolution reaction(HER).Here,we propose a design strategy to introduce a second metal that weakly binds to H and a functional ligand that provides hydrogen bonds and protons to achieve high selectivity of C_(2)oxygenates and effective suppression of HER on the Cu(100)surface *** metals and eleven ligands are screened using first-principles calculations,which shows that Sn is the most efficient for inhibiting HER and cysteamine(CYS)ligand is the most significant in reducing the limiting potential of^(*)CO hydrogenation to^(*)*** the post C-C coupling steps,a so-called“pulling effect”that transfers H in the CYS ligand as a viable proton donor to the C_(2)intermediate to form an H bond,can further stabilize the OH group and facilitate the selection of C_(2)products toward ***,this heterogeneous electrocatalyst can effectively reduce CO_(2)to ethanol and ethylene glycol with an ultra-low limiting potential of-0.43 *** study provides a new strategy for effectively improving the selectivity of C_(2)oxygenates and inhibiting HER to achieve advanced electrocatalytic CO_(2)reduction.

关键词： metal doping hydrogen-bonding ligand density functional theory electrochemical CO_(2)reduction C_(2)oxygenates selectivity

ICG and Sunitinib-loaded NH_(2)-MOFs for Folate-mediated Hepatocellular Carcinoma Dual-modal Therapy

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Chemical Research in Chinese Universities 2021年第4期37卷 967-974页

作者： ZHANG Zhoujing LIU Chuang Ozioma AKAKURU XU Wenjing WU Aiguo ZHANG Yewei School of Medicine Southeast UniversityNanjing210009P.R.China Cixi Institute of BioMedical Engineering CNITECHChinese Academy of SciencesNingbo315201P.R.China

This research investigated a novel folic acid(FA)-modified zirconium core metal-organic framework(MOF)Uio-66 as a nanocarrier to deliver indocyanine green(ICG)and Sunitinib to cancer cells for combination ***-loaded Uio-66 nanoparticles(Pu)were synthesized via a one-pot method,followed by the modification with FA on their *** afforded FPu that enabled subsequent loading of ICG and Sunitinib to achieve dual-modal cancer *** loading/release test and singlet oxygen detection were also conducted in vitro,and the nanoparticles showed considerable drug loading efficiency for both ICG and Sunitinib,coupled with a high singlet oxygen generation ***,drug loading and encapsulation efficiency of Sunitinib were 2.30%and 72.67%,while those for ICG were 2.87%and 90.28%,***,cytotoxicity test on HepG2 human hepatocellular carcinoma cancer cell line revealed that the fully functional nanoparticles possess excellent biocompatibility and as such could be further investigated as a potential drug delivery system for effectual carcinoma cancer treatment.

关键词： Metal organic framework Uio-66 Indocyanine green Sunitinib Hepatocellular carcinoma

Investigation of influence of coal properties on dense-phase pneumatic conveying at high pressure

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Particuology 2012年第3期10卷 310-316页

作者： Cai Liang Xiaoxu Xie Pan Xu Xiaoping Chen Changsui Zhao Xin Wu School of Energy and Environment Southeast UniversityNanjing 210096China Nanjing Department of Environmental Protection Branch.CHEC Nanjing 210013China

Experiments of dense-phase pneumatic conveying of pulverized coal using nitrogen were carried out in a test facility at pressures of up to 3.7 MPa to study the effects of coal type, particle size and moisture content on flow characteristics. The Jenike shear test and scanning electron microscopy （SEM） were employed to provide a better understanding of effects of the material properties on flow characteristics. Two kinds of pulverized coals, Yanzhou and Datong, with similar particle size, moisture content and density, were used in the test. Pressure drop increases with increasing the particle size at similar solid-gas ratio, superficial velocity and pressure in the receiving hopper, and pressure drops through different test sections decrease firstly and then rise with increasing the conveying velocity for the same particle size, mass flow rate and pressure in the receiving hopper. The flowability of pulverized coal decreases with increasing the moisture content in the range from 3.24% to 8.18%. Unconfined yield strength （UYS） increases and flow function （FF） decreases with increasing the moisture content. Results of the shearing tests are consistent with the results of the conveying study. Pressure drops through different test sections are discussed and analyzed.

关键词： Pneumatic conveyingDense-phaseHigh pressureSheartestFlow characteristics

Fluid-inspired field representation for risk assessment in road scenes

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Computational Visual Media 2020年第4期6卷 401-415页

作者： Xuanpeng Li Lifeng Zhu Qifan Xue Dong Wang Yongjie Jessica Zhang School of Instrument science and Engineering Southeast UniversityNanjing 210096China Department of Mechanical Engineering Carnegie Mellon UniversityPittsburghPA 15213USA

Prediction of the likely evolution of traffic scenes is a challenging task because of high uncertainties from sensing technology and the dynamic *** leads to failure of motion planning for intelligent agents like autonomous *** this paper,we propose a fluid-inspired model to estimate collision risk in road ***-object states are detected and tracked,and then a stable fluid model is adopted to construct the risk ***’state spaces are used as the boundary conditions in the simulation of advection and diffusion *** have evaluated our approach on the public KITTI dataset;our model can provide predictions in the cases of misdetection and tracking error caused by *** proves a promising approach for collision risk assessment in road scenes.

关键词： fluid-inspired risk field multi-object tracking road scenes

Research on the evaluation model of the modernization level of urban construction in Jiangsu Province,China

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science China(Technological sciences) 2010年第9期53卷 2510-2514页

作者： YANG JunYan1 & CHEN Wen2 1 School of Architecture,southeast university,Nanjing 210096,China 2 Nanjing Institute of Geography and Limnology,Chinese Academy of sciences,Nanjing 210008,China 1. School of Architecture Southeast University Nanjing 210096 China2. Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China

The modernization of urban construction is a key index in the process of urbanization,and also is an important index to measure the level of socio-economic and cultural *** paper analyzes and explores the related concepts of modernization of urban construction,analyzes the situation and identity of urban construction layer by layer so as to establish an evaluation index system of the modernization level of urban construction and then the paper evaluates the modernization level of urban construction from four different angles,which are the perspectives of the urban planning control,the level of urban facilities,urban management,urban construction *** later analyzes the evaluation results by choosing Jiangsu Province as a research hierarchy from the scale chains of urban study and makes efforts to the operative and directive development direction.

关键词： modernization of urban construction index system evaluation model

Numerical simulation of the seismic behavior of self-centering steel beam-column connections with bottom flange friction devices

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Earthquake Engineering and Engineering Vibration 2011年第2期10卷 229-238页

作者： Guo Tong Song Lianglong Zhang Guodong Key Laboratory of Concrete and Prestressed Concrete Structure Ministry of Education Southeast Univ. Nanjing 210096 China

A new type of steel moment resisting frame with bottom flange friction devices （BFFDs） has been developed to provide self-centering capacity and energy dissipation, and to reduce permanent deformations under earthquakes. This paper presents a numerical simulation of self-centering beam-column connections with BFFDs, in which the gap opening/closing at the beam-column interfaces is simulated by using pairs of zero-length elements with compression-only material properties, and the energy dissipation due to friction is simulated by using truss elements with specified hysteretic behavior. In particular, the effect of the friction bolt bearing against the slotted plate in the BFFDs was modeled, so that the increase in lateral force and the loss of friction force due to the bolt bearing could be taken into account. Parallel elastic-perfectly plastic gap （ElasticPPGap） materials in the Open System for Earthquake Engineering Simulation （OpenSees） were used with predefined gaps to specify the sequence that each bolt went into the bearing and the corresponding increase in bending stiffness. The MinMax material in OpenSees is used to specify the minimum and maximum values of strains of the ElasticPPGap materials. To consider the loss of friction force due to bok bearing, a number of parallel hysteretic materials were used, and the failure of these materials in sequence simulated the gradual loss of friction force. Analysis results obtained by using the proposed numerical model are discussed and compared with the test results under cyclic loadings and the seismic loading, respectively.

关键词： numerical simulation post tensioned self-centering moment resisting steel frame bottom flange frictiondevice bolt bearing