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3rd International Conference on Machine Learning, Cloud Computing and Intelligent Mining, MLCCIM 2024

作者： Zhang, Xuewei Han, deshuai Gao, Zhiyuan Xu, di Wang, ronghao Army Engineering University of PLA Jiangsu Nanjing China Rocket Force Engineering University of PLA Shanxi Xian China Engineering Quality Supervision Centers of Beijing Haidian District Beijing China

ISBN: (纸本)9789819616978

Currently, a large amount of heterogeneous event data with opaque event names (e.g., obscured Ids) are increasingly generated, e.g., the blockchain technology requires the transaction information to be recorded by different stakeholders in various ways from different blocks (i.e., distributed ledgers). Thus, a large amount of heterogeneous event data with opaque event names (e.g., obscured Ids) is generated on blockchains. To identify similar workflows on blockchains for collaborator selection, matching heterogeneous events is an important task. Existing techniques are inappropriate because they do not make full use of workflow features in event logs. We observe that several types of event constraints in event logs may serve as more discriminative features in event matching. Specifically, a general matching approach is proposed for identifying a right mapping that maximizes the similarity of event constraints for a pair of heterogeneous event logs. An advanced A* algorithm with a tight upper bound function is devised to improve the matching efficiency of the proposed approach. We conducted exr5tensive experiments to evaluate the effectiveness of our approach, and the experimental results demonstrate that our approach outperforms state-of-the-art matching approaches. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： distributed ledger

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review on corrosion and corrosion scale formation upon unlined cast iron pipes in drinking water distribution systems

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Journal of Environmental Sciences 2022年第7期34卷 173-189页

作者： Haiya Zhang dibo Liu Lvtong Zhao Jun Wang Shuguang Xie Shuming Liu Pengfei Lin Xiaojian Zhang Chao Chen State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Research Institute for Environmental Innovation(Suzhou) TsinghuaSuzhou 215163China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China

The qualified finished water from water treatment plants(WTPs) may become discolored and deteriorated during transportation in drinking water distribution systems(dWdSs), which affected tap water quality seriously. This water stability problem often occurs due to pipe corrosion and the destabilization of corrosion scales. This paper provides a comprehensive review of pipe corrosion in dWdSs, including corrosion process, corrosion scale formation, influencing factors and monitoring technologies utilized in dWdSs. In terms of corrosion process, corrosion occurrence, development mechanisms, currently applied assays, and indices used to determine the corrosion possibility are summarized, as well as the chemical and bacterial influences. In terms of scale formation, explanations for the nature of corrosion and scale formation mechanisms are discussed and its typical multilayered structure is illustrated. Furthermore, the influences of water quality and microbial activity on scale transformation are comprehensively discussed. Corrosion-related bacteria at the genus level and their associated corrosion mechanism are also summarized. This review helps deepen the current understanding of pipe corrosion and scale formation in dWdSs, providing guidance for water supply utilities to ensure effective measures to maintain water quality stability and guarantee drinking water safety.

关键词： Corrosion Scale formation Water quality stability drinking water distribution system Iron pipe Water supply safety

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A labor-free index-guided semantic segmentation approach for urban vegetation mapping from high-resolution true color imagery

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International Journal of digital Earth 2023年第1期16卷 1640-1660页

作者： Peng Zhang Cong Lin Shanchuan Guo Wei Zhang Hong Fang Peijun du Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology Key Laboratory for Land Satellite Remote Sensing Applications of Ministry of Natural ResourcesSchool of Geography and Ocean ScienceNanjing UniversityNanjingPeople’s Republic of China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application NanjingPeople’s Republic of China c Nanjing Research Institute of Surveying Mapping&Geotechnical InvestigationCo.LtdNanjingPeople’s Republic of China

Accurate and timely information on urban vegetation(UV)can be used as an important indicator to estimate the health of *** to the low cost of rGB cameras,true color imagery(TCI)has been widely used for high spatial resolution UV ***,the current index-based and classifier-based UV mapping approaches face problems of the poor ability to accurately distinguish UV and the high reliance on massive annotated samples,*** address this issue,an index-guided semantic segmentation(IGSS)framework is proposed in this ***,a novel cross-scale vegetation index(CSVI)is calculated by the combination of TCI and Sentinel-2 images,and the index value can be used to provide an initial UV ***,reliable UV and non-UV samples are automatically generated for training the semantic segmentation model,and then the refined UV map can be *** experimental results show that the proposed CSVI outperformed the existingfive rGB vegetation indices in highlighting UV cover and suppressing complex backgrounds,and the proposed IGSS workflow achieved satisfactory results with an OA of 87.72%∼88.16%and an F1 score of 87.73%∼88.37%,which is comparable with the fully-supervised method.

关键词： Urban vegetation mapping Sustainable development Goals(SdGs) cross-scale vegetation index(CSVI) semantic segmentation high-resolution true color imagery(TCI)

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Effect of aging treatment on the precipitation transformation and age hardening of Mg-Gd-Y-Zn-Zr alloy

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Journal of Magnesium and Alloys 2023年第12期11卷 4628-4643页

作者： Mu Meng Honglei Zhang Zhi Gao Genxing Lei Jianmin Yu College of Materials Science and Engineering North University of ChinaXueyuan Road 3Taiyuan 030051China Beijing North Vehicle Group Corporation ZhuJiaFen 5th LiBeijing 100072China

In this study, the precipitation transformation and age hardening of solution-treated Mg-9Gd-4Y-2Zn-0.5Zr(wt.%) alloy were investigated at different aging treatment parameters. The precipitation sequences of the alloy aged at 200℃, 250℃ and 300℃ are β’’(dO19) → β’(BCO) → β(FCC), β’’(dO19) → β’(BCO) → β_(1)(FCC) → β(FCC) and β(FCC), respectively. The streaks sequences of the alloy aged at 200℃, 250℃ and 300℃ are SF, SF → 14H-LPSO and SF → 14H-LPSO, respectively. For the alloy aged at 200℃ and 250℃, the increase in hardness with increasing aging time is contributed from the increase in precipitate volume fraction and the transformation from β’’ to β’ phase with basal → prismatic and spherical → spindle-like precipitate changes. The decrease in hardness after the peak-aging stage is attributed to the appearance of micro-sized β precipitates. Because of the smaller size of precipitates and the triangular arrangement of β’ precipitate, the hardness of the alloy aged at 200℃ is higher than that aged at 250℃. For the alloy aged at 300℃, the appearance of only micro-sized β precipitate and its coarsening with increasing aging time leads to the lowest hardness and an overall decrease in hardness with the aging time.

关键词： Mg-Gd-Y-Zn-Zr alloy Aging treatment Precipitation transformation Age hardening

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risk Assessment Model for Urban rail Transit System Based on Bayesian Network-ISM 6th

Risk Assessment Model for Urban Rail Transit System Based on...

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6th International Conference on Electrical Engineering and Information technologies for rail Transportation, EITrT 2023

作者： Liu, Han Yang, Songpo Yan, Fei Faculty of Architecture Civil and Transportation Engineering Beijing University of Technology Beijing100124 China School of Electronic and Information Engineering Beijing Jiaotong University Beijing100044 China

ISBN: (纸本)9789819993147

Urban rail transit has become one of the main modes of people's travel. Once an accident happens in the urban rail system, it will reduce the traffic efficiency and affect people's normal life. Therefore, it is very necessary to evaluate the safety risks faced by the system during its operation and put forward effective safety management measures. In this paper, a safety risk assessment method combining PCA-ISM- Bayesian network is proposed. Firstly, 61 risk indexes are extracted from the collected Beijing subway accident data by combining with "subway operation safety evaluation standard", and the index system is constructed by PCA method. Secondly, use the ISM model to analyze the logical relationship and build a hierarchical structure among indexes. Finally, the Bayesian network is embedded to build a security risk evaluation model to evaluate the internal risk of the system. The result shows that the safety degree of Beijing subway is acceptable. © 2024, Beijing Paike Culture Commu. Co., Ltd.

关键词： risk analysis

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PyCIL: a Python toolbox for class-incremental learning

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Science China(Information Sciences) 2023年第9期66卷 291-292页

作者： da-Wei ZHOU Fu-Yun WANG Han-Jia YE de-Chuan ZHAN State Key Laboratory for Novel Software Technology Nanjing University

With the rapid development of deep learning, current deep models can learn a fixed number of classes with high performance. However, in our ever-changing world, data often come from the open environment, which is with stream format or available temporarily due to privacy issues. As a result, the classification model should learn new classes incrementally instead of restarting the training process.

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OrB-SLAM3 Front-End Acceleration System Based on ZYNQ Platform

ORB-SLAM3 Front-End Acceleration System Based on ZYNQ Platfo...

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2024 China Automation Congress, CAC 2024

作者： Luo, Qinwei Zhu, Jianfeng Pei, Hailong South China University of Technology Guangzhou China

ISBN: (纸本)9798350368604

OrB-SLAM3, as a highly robust real-time positioning algorithm, can further enhance the platform’s perception of the environment. However, when deployed on small embedded platforms, there are limitations in size, weight, and power, which face the problem of insufficient computing power of embedded platforms to serve SLAM algorithms in real-time. Therefore, this paper is based on the ZYNQ platform to accelerate the most time-consuming feature extraction in the OrB-SLAM3 front-end, in order to achieve real-time positioning of small embedded platforms. Specifically, the Ar0144 binocular camera module is used to collect 640*400 color images in real time, which are converted into grayscale and sent to the FPGA acceleration module to obtain homogenized feature points. After verification, the FPGA acceleration algorithm has a relatively small loss of accuracy, with an average error of about 3.6mm compared to the trajectory running on the PC. Meanwhile, our work achieves a certain balance between running speed and power consumption compared to PC platforms and ZYNQ ArM. © 2024 IEEE.

关键词： feature extraction FPGA Accelerate OrB SLAM

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Biomimetic mesoporous polydopamine nanoparticles for MrI-guided photothermal-enhanced synergistic cascade chemodynamic cancer therapy

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纳米研究（英文版） 2022年第6期15卷 5262-5272页

作者： Nannan Zhang Gaofeng Shu Lin Shen Jiayi ding Enqi Qiao Shiji Fang Jingjing Song Yang Yang Zhongwei Zhao Chenying Lu Jianfei Tu Min Xu Yongzhong du Minjiang Chen Jiansong Ji Key Laboratory of Imaging Diagnosis and Minimally Invasive Interventional Research of Zhejiang Province School of MedicineLishui Hospital of Zhejiaing UniversityLishui 323000China Institute of Pharmaceutics College of Pharmaceutical SciencesZhejiang UniversityHangzhou 310058China

Traditional anticancer treatments fail to significantly improve prognoses,and exploration of novel promising therapeutic modalities is urgently *** this study,multifunctional mesoporous polydopamine nanoparticles(Pt@MPdA/GOx/Fe3+NPs)loaded with glucose oxidase(GOx),Fe ions and ultrasmall Pt nanoparticles(NPs)were prepared for magnetic resonance imaging(MrI)-guided photothermal therapy(PTT)-enhanced chemodynamic therapy(CdT).The oxidation of intratumoral glucose to H2O2 and GOx induced an H2O2-rich microenvironment,and then elevated H2O2 was catalyzed into highly cytotoxic·OH by Fe3+via a Fenton reaction for CdT to induce cancer cell death ***,the heat generated by MPdA NPs under laser irradiation offered a moderate PTT to cascade the CdT ***,Pt NPs can oxidize H2O2 to yield O2,which in turn accelerates the catalytic process of GOx to increase the efficiency of ***,in the high oxidation environment of tumor cells,Pt NPs are oxidized into Pt2+to achieve a tumor chemotherapy *** addition,chelated Fe3+endows the system with an MrI-visible function to monitor the treatment *** conclusion,this study provides a novel MrI-guided PTT-enhanced CdT synergistic nanomedicine platform for cancer therapy.

关键词： mesoporous polydopamine chemodynamic therapy glucose oxidase Fenton reaction synergistic efficacy

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Future of Networked Information Society: A deeply Interconnected "Primitive Society"

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International Journal of Crowd Science 2022年第4期6卷 178-183页

作者： Sun, Xiao Qian, Jun Wang, Ziyang Miao, Jinwei Chai, Yueting National Engineering Laboratory for E-commerce Technologies Department of Automation Tsinghua University Beijing100084 China

Human society is evolving toward the future network information society. In this paper, we identify the interconnected level as the key factor driving the evolution of human society and incorporate it into our proposed evolutionary model of social formation. We show the entire process of social formation evolution at the interconnected level through theoretical analysis and simulation. Our result is consistent with what human beings have gone through. By contrast, the result presents the following four characteristics of the future network information society: the personalization of goods or services, the downsizing of enterprises or organizations, the decentralization of production or life, and the sharing of production or living tools. We regard the future network information society as a deeply interconnected "primitive society". © The author(s) 2022.

关键词： Economics Analytical models Simulation Current measurement Government Production Organizations

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Free Fault Leakages for deep Exploitation: Algebraic Persistent Fault Analysis on Lightweight Block Ciphers

IACR Transactions on Cryptographic Hardware and Embedded Sys...

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IACr Transactions on Cryptographic Hardware and Embedded Systems 2022年第2期2022卷 289-311页

作者： Zhang, Fan Feng, Tianxiang Li, Zhiqi ren, Kui Zhao, Xinjie School of Cyber Science and Technology College of Computer Science and Technology Zhejiang University Hangzhou310027 China State Key Laboratory of Cryptology P.O.Box 5159 Beijing100878 China Alibaba-Zhejiang University Joint Research Institute of Frontier Technologies Hangzhou310027 China Key Laboratory of Blockchain and Cyberspace Governance of Zhejiang Province Hangzhou310027 China Henan Province Key Laboratory of Cyberspace Situation Awareness Zhengzhou450001 China

Persistent Fault Analysis (PFA) is a new fault analysis method for block ciphers proposed in CHES 2018, which utilizes those faults that persist in encryptions. However, one fact that has not been raised enough attention is that: while the fault itself does persist in the entire encryption, the corresponding statistical analysis merely leverages fault leakages in the last one or two rounds, which ignores the valuable leakages in deeper rounds. In this paper, we propose Algebraic Persistent Fault Analysis (APFA), which introduces algebraic analysis to facilitate PFA. APFA tries to make full usage of the free fault leakages in the deeper rounds without incurring additional fault injections. The core idea of APFA is to build similar algebraic constraints for the output of substitution layers and apply the constraints to as many rounds as possible. APFA has many advantages compared to PFA. First, APFA can bypass the manual deductions of round key dependencies along the fault propagation path and transfer the burdens to the computing power of machine solvers such as Crypto-MiniSAT. Second, thanks to the free leakages in the deeper round, APFA requires a much less number of ciphertexts than previous PFA methods, especially for those lightweight block ciphers such as PrESENT, LEd, SKINNY, etc. Only 10 faulty ciphertexts are required to recover the master key of SKINNY-64-64, which is about 155 times of reduction as compared to the state-of-the-art result. Third, APFA can be applied to the block ciphers that cannot be analyzed by PFA due to the key size, such as PrESENT-128. Most importantly, APFA replaces statistical analysis with algebraic analysis, which opens a new direction for persistent-fault related researches. © 2022, ruhr-University of Bochum. All rights reserved.

关键词： Side channel attack

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