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Planning,monitoring and replanning techniques for handling abnormity in HTN-based planning and execution

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Journal of Systems Engineering and Electronics 2024年第5期35卷 1264-1275页

作者： KANG kai cheng kai SHAO Tianhao ZHANG Hongjun ZHANG Ke Command and Control Engineering College Army Engineering University of PLANanjing 210000China The 63rd Research Institute of National University of Defense Technology Nanjing 210000China

A framework that integrates planning,monitoring and replanning techniques is *** can devise the best solution based on the current state according to specific objectives and properly deal with the influence of abnormity on the plan *** framework consists of three parts:the hierarchical task network(HTN)planner based on Monte Carlo tree search(MCTS),hybrid plan monitoring based on forward and backward and norm-based replanning method *** HTN planner based on MCTS selects the optimal method for HTN compound task through *** on specific objectives,it can identify the best solution to the current *** hybrid plan monitoring has the capability to detect the influence of abnormity on the effect of an executed action and the premise of an unexecuted action,thus trigger the *** norm-based replanning selection method can measure the difference between the expected state and the actual state,and then select the best replanning *** experimental results reveal that our method can effectively deal with the influence of abnormity on the implementation of the plan and achieve the target task in an optimal way.

关键词： hierarchical task network Monte carlo tree search(MCTS) planning execution abnormity

Machining dynamics and chatters in micro-milling:A critical review on the state-of-the-art and future perspectives

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chinese Journal of Aeronautics 2024年第7期37卷 59-80页

作者： Qingshun BAI Peng WANG kai cheng Liang ZHAO Yabo ZHANG School of Mechanical and Electrical Engineering Harbin Institute of TechnologyHarbin 150001China Department of Mechanical and Aerospace Engineering Brunel University LondonUxbridge UB83PHUK

Micro-milling technology is widely applied in micro manufacturing,particularly for the fabrication of miniature and micro ***,the chatters and machining dynamics related issues in micro-milling are often the main challenges restricting its machining quality and *** research works have rendered that the machining dynamics and chatters in micro-milling are more complex compared with the conventional macro-milling process,likely because of the size effect and rigidity of the micro-milling system including the tooling,workpiece,process variables,materials involved,and the high-speed milling machines,and further their collective dynamic ***,in this paper,the state of the art focusing on micro-milling chatters and dynamics related issues over the past years are comprehensively and critically reviewed to provide some insights for potential researchers and ***,typical applications and the problems caused by the machining dynamics and chatters in micro-milling have been put forward in this ***,the research on the underlying micro-cutting mechanics and dynamics,stability analysis,chatters detection,and chatter suppression are summarized ***,the underlying scientific and technological challenges are discussed particularly against typical precision engineering ***,the possible future directions and trends in research and development of micro-milling have been discussed.

关键词： Micro-milling Machining dynamics Micro-cutting mechanics Stability lobe diagram(SLD) Chatters suppression Digital twin

A novel reversible-deactivation radical polymerization strategy via near-infrared light-controlled photothermal conversion dividing wall-type heat exchanger

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Science china Chemistry 2021年第7期64卷 1242-1250页

作者： Qun Gao kai Tu Haihui Li Lifen Zhang Zhenping cheng State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Suzhou Key Laboratory of Macromolecular Design and Precision SynthesisCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

As an effective means of utilizing light energy,photothermal conversion has excellent application in the field of ***,a dividing wall-type heat exchanger with the aid of photothermal conversion was designed to conduct polymerization under irradiation with near-infrared(NIR)light by utilizing the ketocyanine-type dye solution as the highly efficient activator(>83.2%photothermal conversion efficiency).Various types of reversible-deactivation radical polymerization(RDRP)methods,including reversible addition-fragmentation chain transfer,atom transfer radical polymerization,and bromine-iodine transformation RDRP,are suitable for this ***-defined polymers with excellent control over molar mass and molar mass dispersity(D<1.28)were thus synthesized within a few hours under NIR(λ_(max)=810 nm,850 nm)irradiation at room ***,in addition to conventional heating methods(such as electrical heating jackets),the designed dividing wall-type heat exchanger via NIR light activation has another unique advantage:it can enhance the polymerization by the synergistic effect of both heating and NIR light irradiation due to the deeper penetration of NIR light.

关键词： near-infrared light photothermal conversion ketocyanine dye reversible-deactivation radical polymerization dividing wall-type heat exchange

Optimal Control of a Universal Rotating Magnetic Vector for Petal-shaped Capsule Robot in Curve Environment

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chinese Journal of Mechanical Engineering 2014年第5期27卷 880-889页

作者： ZHANG Yongshun BAI Jianwei chi Minglu cheng Cunxin WANG Dianlong Key Laboratory for Precision and Non-Traditional Machining of Ministry of Education Dalian University of Technology

Steering control of a capsule robot in curve environment by magnetic navigation is not yet solved completely.A petal-shaped capsule robot with less steering resistance based on multiple wedge effects is presented,and an optimization method with two processes for determining the orientation of a pre-applied universal magnetic spin vector is *** realize quick and non-contact steering swimming,a fuzzy comprehensive evaluation method for optimizing the steering driving angle is presented based on two evaluation indexes including the average steering speed and the average steering trajectory deviation,achieving the initial optimal orientation of a universal magnetic spin *** further reduce robotic magnetic vibration,a main target method for optimizing its final orientation,which is used for fine adjustment,is employed under the constrains of the magnetic *** experimental results in curve pipe verified the effectiveness of the optimization method,which can be effectively used to realize non-contact steering swimming of the petal-shaped robot and reduce its vibration.

关键词： petal-shaped capsule robot universal magnetic spin vector fuzzy comprehensive evaluation method main target method

An innovative wood-chip-framework substrate used as slow-release carbon source to treat high-strength nitrogen wastewater

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Journal of Environmental Sciences 2017年第1期29卷 275-283页

作者： Huai Li Zifang chi Baixing Yan Long cheng Jianzheng Li Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of Sciences State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Key Lab of Groundwater Resources and Environment Ministry of EducationJilin University

Removal of nitrogen in wastewater before discharge into receiving water courses is an important consideration in treatment ***,nitrogen removal efficiency is usually limited due to the low carbon/nitrogen（C/N） ratio.A common solution is to add external carbon sources,but amount of liquid is difficult to ***,a combined wood-chip-framework substrate（with wood,slag and gravel） as a slow-release carbon source was constructed in baffled subsurface-flow constructed wetlands to overcome the *** show that the removal rate of ammonia nitrogen（NH_4~＋-N）,total nitrogen（TN） and chemical oxygen demand（COD） could reach 37.5%-85%,57.4%-86%,32.4%-78%,respectively,indicating the combined substrate could diffuse sufficient oxygen for the nitrification process（slag and gravel zone） and provide carbon source for denitrification process（wood-chip zone）.The nitrification and denitrification were determined according to the location of slag/gravel and wood-chip,*** removal was efficient at the steady phase before a shock loading using slag-wood-gravel combined substrate because of nitrification-denitrification process,while nitrogen removal was efficient under a shock loading with wood-slag-gravel combined substrate because of ANAMMOX *** study provides a new idea for wetland treatment of high-strength nitrogen wastewater.

关键词： Baffled constructed wetland Combined substrate Wood-chip Nitrogen Removal

理论探索二维X_(2)UO_(4)(X=K,Rb,Cs)的力学特征、电子结构和声子输运特征

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原子与分子物理学报 2025年第2期42卷 143-150页

作者：程钧湖北医药学院研究生院十堰442000

本文用基于密度泛函理论的第一性原理计算方法,研究了三种建议的二维材料X_(2)UO_(4)(X=K,Rb,Cs)的稳定性、弹性、电子结构和声子振动特性.计算结果显示,三种材料同时具备较好的热力学、动力学和机械稳定性.电子结构表明,三种材料属于... 详细信息

本文用基于密度泛函理论的第一性原理计算方法,研究了三种建议的二维材料X_(2)UO_(4)(X=K,Rb,Cs)的稳定性、弹性、电子结构和声子振动特性.计算结果显示,三种材料同时具备较好的热力学、动力学和机械稳定性.电子结构表明,三种材料属于宽禁带间接半导体,其计算能隙分别是3.90、3.79和3.42 eV,并且在300 K时有着71.31-174.23 cm^(2)/Vs的电子迁移率.声子输运特性表明,三种材料的声子色散均没有虚频出现,声学模和低频光学模呈现强烈耦合,且有着低频率low-lying声子,这使得材料具备很强的声子非谐效应、低声子群速度和强声子散射率,从而表现出很低晶格热导率,在300 K温度下时仅为0.16-0.19 W/mK.这些特性表明,二维X_(2)UO_(4)(X=K,Rb,Cs)在纳米电子和热电器件领域具备应用潜力.

关键词：二维材料能带迁移率声子热导率

Moment Redistribution Effect of the Continuous Glass Fiber Reinforced Polymer-Concrete Composite Slabs Based on Static Loading Experiment

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Structural Durability & Health Monitoring 2025年第1期19卷 105-123页

作者： Zhao-Jun Zhang Wen-Wei Wang Jing-Shui Zhen Bo-cheng Li De-cheng Cai Yang-Yang Du Hui Huang Offshore Oil Engineering Co.Ltd. Tianjin300461China Department of Bridge Engineering School of TransportationSoutheast UniversityNanjing211189China

This study aimed to investigate the moment redistribution in continuous glass fiber reinforced polymer(GFRP)-concrete composite slabs caused by concrete cracking and steel bar yielding in the negative bending moment *** experimental bending moment redistribution test was conducted on continuous GFRP-concrete composite slabs,and a calculation method based on the conjugate beam method was *** composite slabs were formed by combining GFRP profiles with a concrete layer and supported on steel beams to create two-span continuous composite slab *** methods,epoxy resin bonding,and stud connection,were used to connect the composite slabs with the steel *** experimental findings showed that the specimen connected with epoxy resin exhibited two moments redistribution phenomena during the loading process:concrete cracking and steel bar yielding at the internal *** contrast,the composite slab connected with steel beams by studs exhibited only one-moment redistribution phenomenon throughout the loading *** the concrete at the internal support cracked,the bending moment decreased in the internal support section and increased in the midspan *** the steel bars yielded,the bending moment further decreased in the internal support section and increased in the mid-span *** GFRP profiles do not experience cracking,there was no significant decrease in the bending moment of the mid-span *** test specimens experienced compressive failure of concrete at the mid-span *** results showed good agreement between the calculated and experimental values of bending moments in the mid-span section and internal support *** proposed model can effectively predict the moment redistribution behavior of continuous GFRP-concrete composite slabs.

关键词： Moment redistribution GFRP-concrete composite slabs bending moment experimental study analysis model

Flow field effect of delayed neutron precursors in liquid-fueled molten salt reactors

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Nuclear Science and Techniques 2022年第8期33卷 16-32页

作者： Xian-Di Zuo Mao-Song cheng Yu-Qing Dai kai-cheng Yu Zhi-Min Dai Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of chinese Academy of Sciences Beijing 100049China

In molten salt reactors(MSRs),the liquid fuel salt circulates through the primary loop and a part of the delayed neutron precursors(DNPs)decays outside the reactor *** model and analyze the flow field effect of DNPs in channel-type liquid-fueled MSRs,a three-dimensional space-time dynamics code,named ThorCORE3D,that couples neutronics,core thermalhydraulics,and a molten salt loop system was developed and validated with the Molten Salt Reactor Experiment(MSRE)*** effects of external loop recirculation time,fuel flow rate,and core flow field distribution on the delayed neutron fraction loss of MSRE at steadystate were modeled and simulated using the ThorCORE3D ***,the flow field effect of the DNPs on the system responses of the MSRE in the reactivity insertion transient under different initial conditions was analyzed systematically for the channel-type liquid-fueled *** results indicate that the flow field condition has a significant effect on the steady-state delayed neutron fractions and will further affect the transient power and temperature responses of the reactor *** analysis results for the effect of the DNP flow field can provide important references for the design optimization and safety analysis of liquid-fueled MSRs.

关键词： Molten salt reactor Delayed neutron precursor Nodal expansion method Coupled neutronics and thermal-hydraulics

Strigolactones positively regulate abscisic acid-dependent heat and cold tolerance in tomato

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Horticulture Research 2021年第1期8卷 3271-3285页

作者： cheng chi Xuechen Xu Mengqi Wang Hui Zhang Pingping Fang Jie Zhou Xiaojian Xia kai Shi Yanhong Zhou Jingquan Yu Department of Horticulture Zijingang CampusZhejiang University866 Yuhangtang RoadHangzhou 310058P.R.China Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology 866 Yuhangtang RoadHangzhou 310058P.R.China Key Laboratory of Horticultural Plants Growth Development and Quality ImprovementAgricultural Ministry of China866 Yuhangtang RoadHangzhou 310058P.R.China

Strigolactones are carotenoid-derived phytohormones that impact plant growth and development in diverse ***,the roles of strigolactones in the responses to temperature stresses are largely ***,we demonstrated that strigolactone biosynthesis is induced in tomato(Solanum lycopersicum)by heat and cold *** strigolactone biosynthesis or signaling negatively affected heat and cold tolerance,while application of the synthetic strigolactone analog GR245DS enhanced heat and cold ***-mediated heat and cold tolerance was associated with the induction of abscisic acid(ABA),heat shock protein 70(HSP70)accumulation,C-REPEAT BINDING FACTOR 1(CBF1)transcription,and antioxidant enzyme ***,a deficiency in ABA biosynthesis compromised the GR245DS effects on heat and cold stresses and abolished the GR245DS-induced transcription of HSP70,CBF1,and antioxidant-related *** results support that strigolactones positively regulate tomato heat and cold tolerance and that they do so at least partially by the induction of CBFs and HSPs and the antioxidant response in an ABA-dependent manner.

关键词： tolerance induction tomato