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Preserving Topology of Network Systems: Metric, Analysis, and Optimal Design

IEEE Transactions on Automatic control 2024年第6期70卷 3540-3555页

作者： Li, Yushan Wang, Zitong He, Jianping Chen, Cailian Guan, Xinping Shanghai Jiao Tong University Department of Automation Shanghai200240 China Ministry of Education of China Key Laboratory of System Control and Information Processing Shanghai200240 China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai200240 China

Preserving the topology from being inferred by external adversaries has become a paramount security issue for network systems (NSs), and adding random noises to the nodal states provides a promising way. Nevertheless, recent works have revealed that the topology cannot be preserved under i.i.d. noises in the asymptotic sense. How to effectively characterize the non-asymptotic preservation performance still remains an open issue. Inspired by the deviation quantification of concentration inequalities, this paper proposes a novel metric named trace-based variance-expectation ratio. This metric effectively captures the decaying rate of the topology inference error, where a slower rate indicates better non-asymptotic preservation performance. We prove that the inference error will always decay to zero asymptotically, as long as the added noises are non-increasing and independent (milder than the i.i.d. condition). Then, the optimal noise design that produces the slowest decaying rate for the error is obtained. More importantly, we amend the noise design by introducing one-lag time dependence, achieving the zero state deviation and the non-zero topology inference error in the asymptotic sense simultaneously. Extensions to a general class of noises with multi-lag time dependence are provided. Comprehensive simulations verify the theoretical findings. © 1963-2012 IEEE.

关键词： Network topology

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Bioinspired menstrual blood-derived stem cells-conditioned medium/polymersome nanoparticles for the treatment of carbon tetrachloride-induced acute liver failure in mice

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Aggregate 2024年第4期5卷 376-385页

作者： Zuhong Li Qian Li Xiaoxi Ouyang Shima Tang Qiuhong Liu Yaqi Zhang Yanhong Zhang Xiaopeng Yu Danhua Zhu Ying Mu Lanjuan Li State Key Laboratory for the Diagnosis and Treatment of Infectious Diseases National Clinical Research Center for Infectious DiseasesCollaborative Innovation Center for Diagnosis and Treatment of Infectious DiseasesNational Medical Center for Infectious DiseasesThe First Affiliated HospitalZhejiang University School of MedicineHangzhouChina Research Centre for Analytical Instrumentation College of Control Science and EngineeringState Key Laboratory of Industrial Control TechnologyZhejiang UniversityHangzhouChina

Acute liver failure is a life-threatening syndrome,for which liver transplantation is presently the most effective ***,such treatment is extremely limited by a shortage of donor *** cell therapy offers a promising treatment strategy for acute liver ***,therapeutic efficacy and potential are hampered by administration route and safety *** this work,we fabricated menstrual blood-derived stem cells-conditioned medium/polymersome hybrid nanoparticles that were self-assembled from amphiphilic block copolymers via the direct hydra-tion method and encapsulated therapeutic bioactive factors within the aqueous core of *** merit of vesicular architecture enabled the loading capacity of dis-tinct proteins and the maintenance of biological *** hybrid nanoparticles can be steadily taken up into cytoplasm and promote hepatocyte proliferation in *** in vivo circulation time brought higher accumulation in *** therapeutic nanoparticles alleviated hepatic injury and promoted liver recovery in mice with carbon tetrachloride-induced liver *** the feasibility and benefit of the hybrid nanoparticle therapy,it provided a potential strategy to treat acute liver failure.

关键词： acute liver failure MenSCs-conditioned medium nanoparticles polymersomes

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research on Satellite Attitude control Scheme with Multi-Source Disturbance Suppression

Research on Satellite Attitude Control Scheme with Multi-Sou...

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2023 China Automation Congress, CAC 2023

作者： Li, Mingqun Lei, Yongjun Zhang, Junling Mu, Xiaogang Research and Development Center Beijing Institute of Control Engineering Beijing China

ISBN: (纸本)9798350303759

The problem of satellite attitude control under multiple disturbance sources is studied in this paper. Usually, satellites carry multiple payload devices, and each payload has different start-up times, operating hours, and motion characteristics during operation, resulting in various disturbances to the satellite's attitude. The paper first analyzes the motion characteristics under different loads and sorts out two typical disturbance torques. For the constant disturbance torque, a state observer based on satellite attitude dynamics is proposed to estimate the disturbance torque. Periodic disturbance signals are further divided into two categories. For periodic disturbance torques with known parameters, a disturbance torque fitting feedforward compensation method considering actuator delay is proposed. For periodic disturbance torques with unknown parameters, an adaptive disturbance suppression method based on Lyapunov principle is proposed that can identify parameters. The paper further proposes a solution for attitude control when the satellite is in orbit and subject to multiple sources of disturbance at the same time. Finally, mathematical simulation was conducted on a satellite, and the results showed that the proposed control scheme can effectively suppress various disturbances. After applying the proposed scheme, the suppression of disturbance effects exceeded 90%, verifying the effectiveness and practicality of the proposed scheme. © 2023 IEEE.

关键词： Attitude control

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Influence of minor cerium addition on microstructure and fluidity of as-cast Al-Cu-Mn-Mg alloy

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Journal of Rare Earths 2025年第2期43卷 377-383,I0006页

作者： Yishan Wang Yu Bai Kaixi Jiang Wenxue Fan Puxuan Wang Hai Hao Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China Ningbo Research Institute of Dalian University of Technology Ningbo 315016China

Al-Cu-Mn alloys are widely used to produce automobile components like cylinder heads and engine blocks because of their capability to retain excellent thermal and mechanical characteristics at high ***,the Al-Cu-Mn-based alloys demonstrate restricted fluidity,leading to casting defects such as shrinkage and incomplete *** research investigated the microstructure and fluidity of Al-4.7Cu-1.0Mn-0.5Mg(wt%)alloy with minor cerium(Ce)*** as-cast alloys predominantly compriseα-Al matrix,accompanied by the presence of Al_(2)Cu,Al_(6)Mn,and Al_(8)Cu_(4)Ce *** influence of adding Ce on the fluidity of the Al-4.7Cu-1.0Mn-0.5Mg alloy was investigated using a trispiral fluidity test mold in this *** findings suggest that the addition of Ce within the range of 0.1 wt%to 0.5 wt%in the Al-4.7Cu-1.0Mn-0.5Mg alloy results in an enhancement in ***,the alloy containing 0.4 wt%Ce exhibits a significant increase in fluidity distance,from 349.7 to 485.7 *** improvement can be attributed to the reduction in viscosity,the refinement of secondary dendrite arm spacing,and the modification of secondary phase ***,a higher concentration of Ce leads to a decrease in fluidity length,potentially due to the formation of Al_(8)Cu_(4)Ce.

关键词： Al-Cu-Mn-Mg alloy Rare earths Ce addition Microstructure Fluidity

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Impact of COVID-19 Interventions on Respiratory and Intestinal Infectious Disease Notifications-Jiangsu Province,China,2020–2023

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China CDC weekly 2024年第41期6卷 1059-1064,I0003页

作者： Ziying Chen Xin Liu Jinxing Guan Yingying Shi Wendong Liu Zhihang Peng Jianli Hu School of Public Health Nanjing Medical UniversityNanjing CityJiangsu ProvinceChina Department of Acute Infectious Diseases Control and Prevention Jiangsu Provincial Center for Disease Control and PreventionNanjing CityJiangsu ProvinceChina National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases Chinese Center for Disease Control and PreventionBeijingChina Jiangsu Province Engineering Research Center of Health Emergency Nanjing CityJiangsu ProvinceChina.

Introduction:Many measures implemented to control the coronavirus disease 2019(COVID-19)pandemic have reshaped the epidemic patterns of other infectious *** study estimated the impact of the COVID-19 pandemic on respiratory and intestinal infectious diseases and potential changes following ***:The optimal intervention and counterfactual models were selected from the seasonal autoregressive integrated moving average(SARIMA),neural network autoregression(NNAR),and hybrid models based on the minimum mean absolute percentage error(MAPE)in the test *** relative change rate between the actual notification rate and that predicted by the optimal model was calculated for the entire COVID-19 epidemic prevention period and the“reopening”***:Compared with the predicted notification rate based on the counterfactual model,the total relative change rates for the 9 infectious diseases were−44.24%,respiratory infections(−55.41%),and intestinal infections(−26.59%)during 2020–*** with the predicted notification rate based on the intervention model,the total relative change rates were+247.98%,respiratory infections(+389.59%),and intestinal infections(+50.46%)in *** them,the relative increases in influenza(+499.98%)and hand-foot-mouth disease(HFMD)(+70.97%)were ***:Measures taken in Jiangsu Province in response to COVID-19 effectively constrained the spread of respiratory and intestinal infectious *** and HFMD rebounded significantly after the lifting of COVID-19 intervention restrictions.

关键词： Impact lifting prevention

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research on Attitude control Scheme of Low Cost Microgravity Satellite Based on Pure Magnetic control 6

Research on Attitude Control Scheme of Low Cost Microgravity...

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6th International Conference on Robotics, control and Automation engineering, RCAE 2023

作者： Li, Mingqun Gou, Xingyu Lei, Yongjun Research and Development Center Beijing Institute of Control Engineering Beijing China

ISBN: (纸本)9798350315301

The attitude control problem of microgravity satellite is studied, and a microgravity attitude control scheme using only magnetic torquer for active control is proposed. The paper conducts a force analysis of in orbit satellites, sorts out various factors that affect the microgravity level of satellites, and proposes a low-cost microgravity satellite attitude control system scheme that only uses magnetometers and magnetic torquer under cost constraints. The paper proposes a joint attitude control scheme that combines active and passive control by using only a magnetometer for attitude determination without a gyroscope, and combining a magnetic torquer with a gravity gradient. Then, based on the application requirements of a certain satellite model, the paper designed the orbit and configuration of the satellite, completed the attitude control scheme and in orbit working mode design. Finally, mathematical simulation was conducted, and the results showed that the proposed scheme can achieve attitude control for safe and stable satellite operation. The microgravity level is better than 3e-7 times the Earth's surface gravity acceleration, meeting the design requirements, and has high technical reference value for low-cost microgravity satellites. © 2023 IEEE.

关键词： Attitude control

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Spatial Coordination of Multiple Nonholonomic Agents With Sensory Connectivity Maintenance

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IEEE Transactions on Systems, Man, and Cybernetics: Systems 2025年第5期55卷 3425-3435页

作者： Chen, Xi Chen, Meimin Zhu, Lijun Chai, Li Wuhan University of Science and Technology Engineering Research Center of Metallurgical Automation and Measurement Technology Wuhan430081 China Shandong Huayu University of Technology School of Electrical Engineering Shandong253034 China School of Artificial Intelligence and Automation Wuhan430074 China Zhejiang University College of Control Science and Engineering Hangzhou310027 China

This article aims to propose a general control strategy for coordination of multiple nonholonomic agents in three dimensional space. For real-world applications, since the field sensor equipped on the mobile agents for local information detection and estimation has some limited detecting range, it is necessary to guarantee that the nearby agents must stay within this range of the onboard sensor. This is called sensory connectivity maintenance. A function termed as coordination function with sensory connectivity maintenance (CFSCM) is defined to describe the performances of the coordination as well as the sensory connectivity status between the agents. Then, a general control strategy is designed based on the proposed CFSCM for spatial coordination of multiple nonholonomic agents with sensory connectivity maintenance. Moreover, the applications of the proposed control strategy for formation with omnidirectional sensors and flocking with directional sensors are shown, respectively. Finally, some numerical examples are conducted to validate the theoretical analysis. © 2013 IEEE.

关键词： Maintenance Robot sensing systems Kinematics Vectors Electronic mail Aerospace electronics Three-dimensional displays System dynamics Robot kinematics Multi-agent systems

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An NIR-Ⅱ-emissive Ru(Ⅱ)metallacycle for efficient and safe immunotherapy

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science China Chemistry 2025年第1期68卷 5-7页

作者： Chonglu Li Jianbo Zhan Biao Dong Institute of Health Inspection and Testing Hubei Provincial Center for Disease Control and PreventionWuhan 430070China State Key Laboratory on Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

Immunotherapy,as a groundbreaking cancer treatment,has gained considerable attention for its utilization of the body’s immune system to combat tumors^([1]).This therapy induces tumor cell apoptosis,triggering a sustained anti-tumor immune response and effectively preventing tumor recurrence and metastasis^([2]).The fundamental principle lies in inducing tumor cell death through specific treatment modalities,leading to the release of a cascade of signaling molecules and antigens,thereby mobilizing the immune system to actively identify and attack tumor cells^([3]).

关键词： sustained metastasis thereby

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An Endogenous Production Function in the Green Solow Model 14th

An Endogenous Production Function in the Green Solow Model

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14th International Conference on Optimization and Applications, OPTIMA 2023

作者： Olenev, Nicholas Federal Research Center "Computer Science and Control" of the Russian Academy of Science Moscow Russia

ISBN: (纸本)9783031478581

The paper amends the Green Solow model to replace the neoclassical production function by an endogenous production function. This endogenous function incorporates the growth rate, the rate of degradation of production capacities, and their age limit. All these internal parameters of the economic system make the analysis of environmental problems more interesting. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Age limit Balanced growth path Endogenous production function Solow model Vintage capacity model

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Broadening environmental research in the era of accurate protein structure determination and predictions

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Frontiers of Environmental science & engineering 2024年第7期18卷 169-178页

作者： Mingda Zhou Tong Wang Ke Xu Han Wang Zibin Li Wei-xian Zhang Yayi Wang State Key Laboratory of Pollution Control and Resources Reuse Shanghai Institute of Pollution Control and Ecological SecurityCollege of Environmental Science and EngineeringTongji UniversityShanghai 200092China Translational Research Institute of Brain and Brain-Like Intelligence Shanghai Fourth People's HospitalSchool of MedicineTongji UniversityShanghai 200434China

The deep-learning protein structure prediction method AlphaFold2 has garnered enormous attention beyond the realm of structural biology,for its groundbreaking contribution to solving the"protein foiding problem"In this perspective,we explore the connection between protein structure studies and environmental research,delving into the potential for addressing specific environmental *** are promising for environmental applications because of the functional diversity endowed by their structural ***,structural studies on proteins with environmental significance remain ***,we present the opportunity to study proteins by advancing experimental determination and deep-learning prediction ***,the latest progress in environmental research via cryogenic electron microscopy is *** allows us to determine the structure of protein complexes in their native state within cells at molecular resolution,revealing environmentally-associated structural *** the remarkable advancements in computational power and experimental resolution,the study of protein structure and dynamics has reached unprecedented depth and *** advancements will undoubtedly accelerate the establishment of comprehensive environmental protein structural and functional *** opportunities for protein engineering exist to enable innovative solutions for environmental applications,such as the degradation of persistent contaminants,and the recovery of valuable metals as well as rare earth elements.

关键词： Environmental proteins Protein structure Cryogenic electron microscopy Protein structure prediction Protein engineering Artificial Intelligence

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