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A Privacy-preserving Algorithm for AC Microgrid Cyber-physical System Against False Data Injection Attacks

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Journal of Modern Power Systems and Clean Energy 2023年第5期11卷 1646-1658页

作者： jun yang Yu Zhang College of Information Science and Engineering Northeastern UniversityShenyangChina Liaoning Provincial Transportation Planning and Design Institute Co. Ltd.ShenyangChina

A new privacy-preserving algorithm based on the Paillier cryptosystem including a new cooperative control strategy is proposed in this paper, which can resist the false data injection(FDI) attack based on the finite-time control theory and the data encryption strategy. Compared with the existing algorithms, the proposed privacy-preserving algorithm avoids the direct transmission of the ciphertext of frequency data in communication links while avoiding complex iterations and communications. It builds a secure data transmission environment that can ensure data security in the AC microgrid cyber-physical system(CPS). This algorithm provides effective protection for AC microgrid CPS in different cases of FDI attacks. At the same time, it can completely eliminate the adverse effects caused by the FDI attack. Finally, the effectiveness, security, and advantages of this algorithm are verified in the improved IEEE 34-node test microgrid system with six distributed generators(DGs) in different cases of FDI attacks.

关键词： AC microgrid cyber-physical system(CPS) distributed cooperative control false data injection(FDI)attack Paillier cryptosystem

Tag clustering algorithm LMMSK: improved K-means algorithm based on latent semantic analysis

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Journal of Systems Engineering and Electronics 2017年第2期28卷 374-384页

作者： Jing yang jun Wang School of Economics and Management Beihang University Beijing 100191 China

With the wide application of Web-2.0 and social software, there are more and more tag-related studies and applications. Because of the randomness and the personalization in users' tagging, tag research continues to encounter data space and semantics obstacles. With the min-max similarity (MMS) to establish the initial centroids, the traditional K-means clustering algorithm is firstly improved to the MMSK-means clustering algorithm, the superiority of which has been tested; based on MMSK-means and combined with latent semantic analysis (LSA), here secondly emerges a new tag clustering algorithm, LMMSK. Finally, three algorithms for tag clustering, MMSK-means, tag clustering based on LSA (LSA-based algorithm) and LMMSK, have been run on Matlab, using a real tag-resource dataset obtained from the Delicious Social Bookmarking System from 2004 to 2009. LMMSK's clustering result turns out to be the most effective and the most accurate. Thus, a better tag-clustering algorithm is found for greater application of social tags in personalized search, topic identification or knowledge community discovery. In addition, for a better comparison of the clustering results, the clustering corresponding results matrix (CCr matrix) is proposed, which is promisingly expected to be an effective tool to capture the evolutions of the social tagging system. © 2017 Beijing Institute of Aerospace Information.

关键词： Application programs Data mining MATLAB Semantics Social networking (online) Websites

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《沙家浜》阿庆嫂原型演变释读

东北师大学报（哲学社会科学版） 2025年第1期 107-116页

作者：张均中山大学中文系广东广州510275

现代革命京剧《沙家浜》及其前身沪剧《芦荡火种》中的阿庆嫂形象,系从原型东来茶馆老板胡广兴改换性别而来。在如此“变性记”的背后,是社会主义现实主义与“大众之法”之间反复发生的龃龉、竞争与调适。其中,“新人叙事学”并未主导... 详细信息

现代革命京剧《沙家浜》及其前身沪剧《芦荡火种》中的阿庆嫂形象,系从原型东来茶馆老板胡广兴改换性别而来。在如此“变性记”的背后,是社会主义现实主义与“大众之法”之间反复发生的龃龉、竞争与调适。其中,“新人叙事学”并未主导英雄的叙事建构,江湖风情、义气及“斗”之喜剧机制三重“大众之法”共同介入《芦荡火种》对原型人物的删改与虚构,《沙家浜》则以革命对“大众之法”予以双重再调适。阿庆嫂作为经典形象的形成,孕育了社会主义文艺在英雄叙述方面不可多得的艺术经验。

关键词：《沙家浜》阿庆嫂江湖

Sampled Value Attack Detection for Busbar Differential Protection Based on a Negative Selection Immune System

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Journal of Modern Power Systems and Clean Energy 2023年第2期11卷 421-433页

作者： jun Mo Hui yang Guangxi Key Laboratory of Power System Optimization and Energy Technology Guangxi UniversityNanning 530004China

Considering a variety of sampled value(SV)attacks on busbar differential protection(BDP)which poses challenges to conventional learning algorithms,an algorithm to detect SV attacks based on the immune system of negative selection is developed in this *** healthy SV data of BDP are defined as self-data composed of spheres of the same size,whereas the SV attack data,i.e.,the nonself data,are preserved in the nonself space covered by spherical detectors of different *** avoid the confusion between busbar faults and SV attacks,a self-shape optimization algorithm is introduced,and the improved self-data are verified through a power-frequency fault-component-based differential protection criterion to avoid false *** on the difficulty of boundary coverage in traditional negative selection algorithms,a self-data-driven detector generation algorithm is proposed to enhance the detector coverage.A testbed of differential protection for a 110 kV double busbar system is then *** SV attacks of BDP such as amplitude and current phase tampering,fault replays,and the disconnection of the secondary circuits of current transformers are considered,and the delays of differential relay operation caused by detection algorithms are investigated.

关键词： Cyberattack busbar differential protection(BDP) negative selection self-data-driven detector sampled value attacks internal faults

Transient chemical-mediated epigenetic modulation confers unrestricted lineage potential on human primed pluripotent stem cells

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Science China Life Sciences 2025年

作者： Shi Chen Yuanyuan He Lejun Lv Bei Liu Cheng Li Hongkui Deng jun Xu Department of Cell Biology School of Basic Medical Sciences Peking University Stem Cell Research Center Peking University Health Science Center Peking University Academy of Advanced Interdisciplinary Studies Peking University BeiCell Therapeutics School of Life Sciences Center for Bioinformatics Center for Statistical Science Peking University MOE Engineering research Center of regenerative Medicine School of Basic Medical Sciences State Key Laboratory of Natural and Biomimetic Drugs Peking University Health Science Center and the MOE Key Laboratory of Cell Proliferation and Differentiation College of Life Sciences Peking-Tsinghua Center for Life Sciences Peking University

Human primed pluripotent stem cells are capable of generating all the embryonic ***,their extraembryonic trophectoderm potentials are *** remains unclear how to expand their developmental potential to trophectoderm *** we show that transient treatment with a cocktail of small molecule epigenetic modulators imparts trophectoderm lineage potentials to human primed pluripotent stem cells while preserving their embryonic *** chemically treated cells can generate trophectoderm-like cells and downstream trophoblast stem cells,diverging into syncytiotrophoblast and extravillous trophoblast *** and CUT&Tag analyses reveal that these induced cells share transcriptional profiles with in vivo trophectoderm and cytotrophoblast,and exhibit reduced H3K27me3 modification at gene loci specific to trophoblast lineages compared with primed pluripotent *** exploration highlighted the critical roles of epigenetic modulators HDAC2,EZH1/2,and KDM5s in the activation of trophoblast lineage *** findings demonstrate that transient epigenetic resetting activates unrestricted lineage potential in human primed pluripotent stem cells,and offer new mechanistic insights into human trophoblast lineage specification and in vitro models for studying placental development and related disorders.

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Effect of Epoxy resin on the Properties of recycled Asphalt

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Journal of Wuhan University of Technology(Materials Science) 2024年第5期39卷 1149-1155页

作者： yang ruochong CHEN Huimin yang jun School of Transportation Southeast UniversityNanjing 211189China

To promote the recycling of reclaimed asphalt pavement(rAP),epoxy resin was used to prepare the epoxy-recycled asphalt *** effect of epoxy resin on the properties of aged asphalt binder was investigated based on the tensile test,flexural creep test,and laser scanning confocal *** curing characteristics and the mechanical performance of recycled asphalt with different epoxy contents were *** results show that the low-temperature performance,ductility,and strength of the aged asphalt binder were significantly improved when the epoxy content reached 40%.The curing time of epoxy-recycled asphalt should be at least 4 d to ensure the formation of good internal spatial network structure.

关键词： rAP epoxy resin aged asphalt mechanical performance

On a Class of Two-Dimensional Projectively Flat Finsler Metrics with Constant Flag Curvature

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Acta Mathematica Sinica,English Series 2013年第5期29卷 959-974页

作者： Guo jun yang Department of Mathematics Sichuan University

In this paper, we study a special class of two-dimensional Finsler metrics defined by a riemannian metric and 1-form. We classify those which are locally projectively flat with constant flag curvature.

关键词： (α β)-Metric projectively flat constant flag curvature

Enhanced primary treatment of low-concentration municipal wastewater by means of bio-flocculant Pullulan

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第5期8卷 719-723页

作者： yang Kai yang Xiao-jun yang Mo School of Civil Engineering Wuhan University Wuhan 430072 China School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China

Jar tests were conducted to investigate the performance of enhanced primary treatment processes for low-concentra-tion municipal wastewater from South China by using composite flocculant combined with bio-flocculants Pullulan and poly-aluminum-chloride (PAC). The optimum dosage for composite flocculant and conditions for flocculation were determined. The experimental results indicated that composite flocculant had high efficiency for removing over 95% of turbidity, over 58% of CODCr (chemical oxygen demand determined with potassium dichromate), over 91% of TP (total phosphate), and over 15% of NH3-N. Moreover, it could improve sludge settling and dehydration properties, and decrease the treatment cost.

关键词： Bio-flocculant Pullulan Enhanced primary treatment

Construction of 2_Ⅲ^(m-(m-k)) Designs with the Maximum Number of Clear Two-factor Interactions

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Acta Mathematicae Applicatae Sinica 2007年第1期23卷 107-112页

作者： Gui-jun yang Department of Statistics Tianjin University of Finance and Economics Tianjin 300222 China

It is useful to know the maximum number of clear two-factor interactions in a 2Ⅲ^[m-（m-k）] design. This paper provides a method to construct a 2Ⅲ^[m-（m-k）] design with the maximum number of clear two-factor interactions. And it is proved that the resulting designs have more dear two-factor interactions than those constructed by Tang et al. Moreover, the designs constructed are shown to have concise grid representations.

关键词： resolution minimum aberration clear two-factor interaction