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Characterization and sources of childhood PAEs exposure from residential airborne dust in China cities

Journal of Environmental sciences 2025年第6期152卷 1-13页

作者： Chao Wang Shuhan Gong Yun Cao Mengmeng Liu Wenying Zhang Xiaotong Zhang Lin Fan Li Li Hang Du Mats Tysklind Xu Yang Xianliang Wang China CDC Key Laboratory of Environment and Population Health National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijing 100021China National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijing 100021China School of Public Health Anhui Medical UniversityHefei 230032China Department of Chemistry Umea UniversityUmea SE-90187Sweden College of Life Science Huazhong Normal UniversityWuhan 430079China Xianning Medical College Hubei University of Science and TechnologyXianning 437100China

To explore the multicenter characteristics of endocrine-like phthalate esters(PAEs)in household dust and propose effective control strategies for global indoor public *** on-site observational investigation was conducted in nine Chinese cities from 2018 to 2019.A total of 246 household dust sampleswere collected and analyzed for ten PAE congeners using Gas Chromatography-Mass Spectrometry(GC-MS).Questionnaires were used to gather information on building conditions,indoor behaviors,and ventilation *** residential dust from the nine cities,the total concentrations of the ten PAE congeners(PAEs)ranged from 0.921 to 29097.297μg/*** phthalate(DCHP)and di(2-ethylhexyl)phthalate(DEHP)were the dominant congeners in*** exposure to PAEs through dust ingestion was four orders of magnitude higher than through inhalation,with a carcinogenic risk of 5.47×10^(−6) for DEHP exposure in household ***PAEs concentrations were associated with higher temperature,double glazing,wall paint usage,television and computer use,and indoor plant *** multicenter on-site investigation confirmed PAE pollution characteristics and uncovered the inacceptable risk of daily DEHP exposure in household dust under real living *** mitigation measures based on household-related information,residential characteristics,decoration materials,and lifestyle should be taken to build a healthy household environment.

关键词： Phthalate esters Household dust Source analysis Health risk Influencing factors

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The COVID-19 Vaccines Evaluation Program:Implementation,Management,and Experiences,2021-2023

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China CDC weekly 2024年第26期6卷 642-648页

作者： Tingting Yan Hui Zheng Mingshuang Li Chao Ma Xuanyi Wang Xiaoqi Wang Zhenjun Li Yuansheng Chen Wenshang Hu Lance Rodewald Zhijie An Zundong Yin Zijian Feng National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases(NITFID).National Immunization Program Chinese Center for Disease Control and PreventionBeijingChina Institutes of Biomedical Sciences Fudan UniversityShanghaiChina Office of International Cooperation Chinese Center for Disease Control and PreventionBeijingChina Office of Science and Technology Chinese Center for Disease Control and PreventionBeijingChina Office of Finance Chinese Center for Disease Control and PreventionBeijingChina Chinese Preventive Medicine Association BeijingChina

In 2021,China’s domestically produced coronavirus disease 2019(COVID-19)vaccines received approval from regulatory bodies and were administered *** to a low number of infections within China during that period,it became imperative to evaluate the vaccines’real-world effectiveness through international *** facilitate this,China CDC launched the COVID-19 Vaccines Evaluation Program(COVEP).This program formed research collaboration agreements with health institutes across five World Health Organization regions,addressing key questions about vaccine performance through ten cooperative *** findings from COVEP projects reinforced confidence,both domestically and globally,in the effectiveness of the vaccines produced in ***,the outcomes observed internationally were frequently mirrored by later studies conducted within *** thus pioneered a novel approach for fostering cross-national research collaborations,addressing significant public health issues and exemplifying a framework for international *** approach is in line with the strategic objectives and other development efforts of China CDC’s national disease control and prevention initiatives.

关键词： approval COV prevention

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Bipartite Formation control for Linear Multi-agent Systems with External Disturbances via Observer-Based Output Feedback 7th

Bipartite Formation Control for Linear Multi-agent Systems ...

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7th Chinese Conference on Swarm Intelligence and Cooperative control, CCSICC 2023

作者： Zhang, Pengyu Mao, Li Zhang, Wei Tang, Kai Laboratory of Intelligent Control and Robotics Shanghai University of Engineering Science 333 Longteng Road Shanghai China Computer Engineering College Dalian University of Technology 1 Guangning Road Dalian China

ISBN: (纸本)9789819733392

This article investigates the problem of bipartite formation control for a class of multi-agent systems composed of two sub-formations with an inverse connection. A distributed control algorithm with observer-based output feedback is proposed under directed signed topology and unknown external disturbances. Some sufficient conditions are established to achieve a bipartite time-varying formation with bounded tracking error. Furthermore, it is shown that the suggested observer-based formation control has good robustness. Finally, a simulation example is illustrated to show the feasibility and effectiveness of the presented control scheme. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Multi agent systems

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MARLander: A Local Path Planning for Drone Swarms using Multiagent Deep Reinforcement Learning

MARLander: A Local Path Planning for Drone Swarms using Mult...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Demetros Aschu Robinroy Peter Sausar Karaf Aleksey Fedoseev Dzmitry Tsetserukou Intelligent Space Robotics Laboratory Skolkovo Institute of Science and Technology Moscow Russia

ISBN: (数字)9781665410205

ISBN: (纸本)9781665410212

Achieving safe and precise landings for a swarm of drones poses a significant challenge, primarily attributed to conventional control and planning methods. This paper presents the implementation of multi-agent deep reinforcement learning (MADRL) techniques for the precise landing of a drone swarm at relocated target locations. The system is trained in a realistic simulated environment with a maximum linear velocity of 3 m/s in training spaces of 4 m 3 and deployed utilizing Crazyflie drones with a Vicon indoor localization system. The experimental results revealed that the proposed approach achieved a landing accuracy of 2.26 cm on stationary and 3.93 cm on moving platforms surpassing a baseline method used with a Proportional-integral-derivative (PID) controller with an Artificial Potential Field (APF). This research high-lights drone landing technologies that eliminate the need for analytical centralized systems, potentially offering scalability and revolutionizing applications in logistics, safety, and rescue missions.

关键词： Training Location awareness Scalability Deep reinforcement learning Path planning Safety Planning PD control Drones Logistics

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Mathematical Modeling of GM (1, 1) Polymorphic Management Based on Dormant System

Mathematical Modeling of GM (1, 1) Polymorphic Management Ba...

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2022 International Conference on Applied Mathematics and Digital Simulation, AMDS 2022

作者： Zhang, Ying Peng, Di Beijing Aerospace Automatic Control Institute Beijing100854 China National Key Laboratory of Science and Technology on Aerospace Intelligent Control Beijing100854 China China Academy of Launch Vehicle Technology Beijing100076 China

In this paper, a GM(1, 1) polymorphic management prediction algorithm based on a dormant system is proposed, which first obtains the optimal data quantity m through simulation, and then the data used is forecasted only once, and the input data will be updated to the latest data immediately after the prediction is completed, and then the parameter estimates will be recalculated for the next prediction. The simulation results show that the MRE value of the optimized GM (1, 1) is 0.090, which has much better MRE values for GM (1, 1) algorithms that are not optimized. At the same time, other commonly used algorithms in the industry are compared horizontally. In contrast, the optimized GM (1, 1) algorithm responds quickly, has high prediction accuracy, short prediction time, and consumes fewer resources. © Published under licence by IOP Publishing Ltd.

关键词： Forecasting

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Aseismic mechanism of laminated shear energy dissipation structure in tunnels during an earthquake

Aseismic mechanism of laminated shear energy dissipation str...

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ITA-AITES World Tunnel Congress, WTC 2024

作者： Zhang, Xuepeng Cao, Anting Jiang, Yujing Wang, Xingda State Key Laboratory of Strata Intelligent Control and Green Mining Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology Qingdao China College of Energy and Mining Engineering Shandong University of Science and Technology Qingdao China School of Engineering Nagasaki University Nagasaki Japan

ISBN: (纸本)9781032800424

The longitudinal seismic response of a tunnel during an earthquake cannot be ignored aspect same as the transversal seismic response. A novel laminated shear energy dissipation (LSED) structure is proposed for the longitudinal aseismic design in this paper. The LSED structure is composed of thin steel plate and rubber layer bonded alternately aiming at improving the longitudinal seismic performance of the tunnel by changing the connection mode between the linings. The laboratory compression-shear test on the LSED structure is carried out. Results show that a better deformation capacity in the horizontal direction because of the small horizontal stiffness of the rubber layer in the structure, and a larger vertical bearing capacity in the vertical direction because of the rigidity of the thin steel plate. A three-dimensional refined numerical model of LSED structure-tunnel lining-surrounding ground is established using the finite element software ABAQUS. The seismic response analysis is carried out by using the dynamic time history method. The research results showed that the installation of LSED structure could effectively reduce the seismic response of the lining with the seismic mitigation rate of more than 45%. © 2024 The Author(s).

关键词： Earthquakes

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Nonlinear flow control mechanism of two flexible flaps with fluid-structure interaction

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Acta Mechanica Sinica 2025年第2期41卷 116-131页

作者： Jiakun Han Chao Dong Jian Zhang Gang Chen College of Science Xi’an University of Science and TechnologyXi’an 710054China Beijing Institute of Space Long March Vehicle Beijing 100076China Science and Technology on Space Physics Laboratory China Academy of Launch Vehicle TechnologyBeijing 100076China State Key Laboratory of Strength and Vibration for Mechanic Structures Shaanxi Key Laboratory of Service Environment and Control for Flight VehiclesSchool of Aerospace EngineeringXi’an Jiaotong UniversityXi’an 710049China

The flow control at low Reynolds numbers is one of the most promising technologies in the field of aerodynamics,and it is also an important source of the innovation for novel *** this study,a new way of nonlinear flow control by interaction between two flexible flaps is proposed,and their flow control mechanism is studied employing the self-constructed immersed boundary-lattice Boltzmann-finite element method(IB-LB-FEM).The effects of the difference in material properties and flap length between the two flexible flaps on the nonlinear flow control of the airfoil are *** is suggested that the relationship between the deformation of the two flexible flaps and the evolution of the vortex under the fluid-structure interaction(FSI).It is shown that the upstream flexible flap plays a key role in the flow control of the two flexible *** FSI effect of the upstream flexible flap will change the unsteady flow behind it and affect the deformation of the downstream flexible *** flexible flaps with different material properties and different lengths will change their own FSI characteristics by the induced vortex,effectively suppressing the flow separation on the airfoil’s upper *** interaction of two flexible flaps plays an extremely important role in improving the autonomy and adjustability of flow *** numerical results will provide a theoretical basis and technical guidance for the development and application of a new flap passive control technology.

关键词： Nonlinear flow control Flexible flap Fluid-structure interaction Flow separation IB-LB-FEM

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Graphene binding on black phosphorus enables high on/off ratios and mobility

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National science Review 2024年第2期11卷 188-195页

作者： Fanrong Lin Zhonghan Cao Feiping Xiao Jiawei Liu Jiabin Qiao Minmin Xue Zhili Hu Ying Liu Huan Lu Zhuhua Zhang Jens Martin Qingjun Tong Wanlin Guo Yanpeng Liu Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education State Key Laboratory of Mechanics and Control of Mechanical Structures and Institute for Frontier Science Nanjing University of Aeronautics and Astronautics Centre for Advanced 2D Materials National University of Singapore School of Physics and Electronics Hunan University Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and MeasurementSchool of PhysicsBeijing Institute of Technology Leibniz Institute für Kristallzüchtung

Graphene is one of the most promising candidates for integrated circuits due to its robustness against short-channel effects, inherent high carrier mobility and desired gapless nature for Ohmic contact, but it is difficult to achieve satisfactory on/off ratios even at the expense of its carrier mobility, limiting its device applications. Here, we present a strategy to realize high back-gate switching ratios in a graphene monolayer with well-maintained high mobility by forming a vertical heterostructure with a black phosphorus multi-layer. By local current annealing, strain is introduced within an established area of the graphene, which forms a reflective interface with the rest of the strain-free area and thus generates a robust off-state via local current depletion. Applying a positive back-gate voltage to the heterostructure can keep the black phosphorus insulating, while a negative back-gate voltage changes the black phosphorus to be conductive because of hole accumulation. Then, a parallel channel is activated within the strain-free graphene area by edge-contacted electrodes, thereby largely inheriting the intrinsic carrier mobility of graphene in the on-state. As a result, the device can provide an on/off voltage ratio of >10～3 as well as a mobility of ～8000 cm2V-1s-1at room temperature, meeting the low-power criterion suggested by the International Roadmap for Devices and Systems.

关键词： graphene on/off ratio mobility black phosphorus reflective interface

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LLM-BRAIn: AI-driven Fast Generation of Robot Behaviour Tree based on Large Language Model

LLM-BRAIn: AI-driven Fast Generation of Robot Behaviour Tree...

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Foundation and Large Language Models (FLLM), International Conference on

作者： Artem Lykov Dzmitry Tsetserukou Intelligent Space Robotics Laboratory Skolkovo Institute of Science and Technology Moscow Russia

ISBN: (数字)9798350354799

ISBN: (纸本)9798350354805

This paper introduces a pioneering methodology in autonomous robot control, denoted as LLM-BRAIn, enabling the generation of adaptive behaviors in robots in response to operator commands, while simultaneously considering a multitude of potential future events. Unlike traditional step-by-step behavior generation methods, LLM-BRAIn leverages a behavior tree (BT) format that inherently encompasses various potential outcomes, thus reducing the frequency of model queries and optimizing resource utilization and decision-making time. LLM-BRAIn is a transformer-based Large Language Model (LLM) fine-tuned from the Stanford Alpaca 7B model to generate a BT from text descriptions. The model was trained on 8.5k instruction-following demonstrations generated using GPT-3.5. LLM-BRAIn accurately builds complex robot behavior while remaining small enough to run on the robot’s onboard microcomputer. The model generates structurally and logically correct BTs and can manage instructions not presented in the training set. Experiments revealed no significant subjective differences between BTs generated by LLM-BRAIn and human-created BTs, with participants distinguishing between them correctly in only 4.53 out of 10 cases, indicating performance close to random *** proposed approach holds promise for applications across various domains, including mobile robotics, drone operations, robot manipulator systems, and Industry 5.0. This applicability stems from the BT framework’s inherent consideration of numerous potential outcomes, obviating the need for exhaustive deliberation at each step, thereby expediting the robot’s operations. We provide a dataset for LLM-BRAIn replication: ***/datasets/ArtemLykov/LLM BRAIn dataset.

关键词： Training Time-frequency analysis Service robots Large language models Transformers Resource management Mobile robots Robots Drones Autonomous robots

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Research on multi-dimensional heterogeneous compound control method of anti-access aircraft with prescribed performance

Research on multi-dimensional heterogeneous compound control...

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第43届中国控制会议

作者： Yuemeng Ma Ningyuan Wang Ming Liu Zhen Xiao Ding Yang Jingying Cao Science and Technology on Space Physics Laboratory Department of Control Science and Engineering Harbin Institute of Technology

ISBN: (数字)9789887581581

ISBN: (纸本)9798350366907

For attack and defense confrontation scenarios in near-space,to enhance the maneuverability of the anti-access aircraft in low dynamic pressure environment,a prescribedperformance-based multidimensional heterogeneous compound control system is proposed in this paper to meet the precision guidance requirements of fast and high-precision response to overload commands by the synergistic cooperation of direct force and aerodynamic *** time and steady state accuracy of the system are designed based on the prescribed performance control *** surface controllers is designed for aerofin to observe and compensate for complex *** direct forces,a sliding mode controller is designed and applied to achieve rapid tracking to *** layers and auxiliary system are introduced to reduce the impact of actuator physical constraints on control *** Lyapunov stability proof of compound control system is *** results demonstrate that the multidimensional heterogeneous compound control system proposed can not only make the response process of AOA meet the prescribed-performance requirement but also avoid the "tug-of-war" phenomenon of actuators.

关键词： anti-access aircraft multi-dimensional heterogeneous compound control lateral jets and aerodynamics control prescribed performance control nonlinear extended state observer(NESO)

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