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Fast and Adaptive Multi-Agent Planning under Collaborative Temporal Logic Tasks via Poset Products

Research 2024年第2期2024卷 81-94页

作者： Zesen Liu meng guo Weimin Bao Zhongkui Li Deparment of Mechanics and Engineering Science College of EngineeringPeking UniversityBejing 0081 China Science and Technology Commission of China Aerospace Science and Technology Corporation Beijing 100048China

Efficient coordination and planning is essential for large-scale multi-agent systems that collaborate in a shared dynamic environment. Heuristic search methods or learning-based approaches often lack the guarantee on correctness and performance. Moreover, when the collaborative tasks contain both spatial and temporal requirements, e.g., as linear temporal logic (LTL) formulas, formal methods provide a verifiable framework for task planning. However, since the planning complexity grows exponentially with the number of agents and the length of the task formula, existing studies are mostly limited to small artificial cases. To address this issue, a new planning paradigm is proposed in this work for system-wide temporal task formulas that are released online and continually. It avoids two common bottlenecks in the traditional methods, i.e., (a) the direct translation of the complete task formula to the associated B點hi automaton and (b) the synchronized product between the B點hi automaton and the transition models of all agents. Instead, an adaptive planning algorithm is proposed, which computes the product of relaxed partially ordered sets (R-posets) on-the-fly and assigns these subtasks to the agents subject to the ordering constraints. It is shown that the first valid plan can be derived with a polynomial time and memory complexity with respect to the system size and the formula length. Our method can take into account task formulas with a length of more than 400 and a fleet with more than 400 agents, while most existing methods fail at the formula length of 25 within a reasonable duration. The proposed method is validated on large fleets of service robots in both simulation and hardware experiments.

关键词： hardware service system

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Progresses and Prospects of Asymmetrically Coordinated Single Atom Catalysts for Lithium-Sulfur Batteries

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Energy & Environmental Materials 2024年第4期7卷 48-63页

作者： Rong Zhou Shaonan Gu meng guo Shuzheng Xu guowei Zhou Key Laboratory of Fine Chemicals in Universities of Shandong Jinan Engineering Laboratory for Multi-scale Functional Materials School of Chemistry and Chemical Engineering Qilu University of Technology(Shandong Academy of Sciences)

Lithium-sulfur batteries (LSBs) are widely regarded as promising next-generation batteries due to their high theoretical specific capacity and low material ***,the practical applications of LSBs are limited by the shuttle effect of lithium polysulfides (LiPSs),electronic insulation of charge and discharge products,and slow LiPSs conversion reaction kinetics.

关键词： asymmetrical coordination conversion catalysis Li-S batteries shuttle effect single atom catalysts

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Bioinspired design of integral molded Janus silk fibroin-MXene evaporator for efficient solar vapor generation

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Nano Research 2024年第4期17卷 2824-2835页

作者： Ling-Qing Kong Zhi-Cheng Zeng Guang-Zong Min Zhao-Hui meng guo-Qing meng Xiao-Xiao guo Nai-Bo Lin Xiang-Yang Liu The Higher Educational Key Laboratory for Biomedical Engineering of Fujian Province Research Center of Biomedical Engineering of XiamenDepartment of BiomaterialsCollege of MaterialsXiamen UniversityXiamen 361005China The State Key Laboratory of Marine Environmental Science(MEL) College of Ocean and Earth SciencesXiamen UniversityXiamen 361005China

Solar vapor generation is a promising sustainable technology that uses solar distillation to produce fresh water from seawater and wastewater,helping relieve global water resource ***,inspired by naturally grown integrally molded mulberry leaves with a Janus hydrophilic and hydrophobic structure,a novel,simple,and efficient integrated molding method is proposed to break through the limitations of the traditional split manufacturing strategy and realizes the integrated formation of Janus *** on the spontaneous sedimentation characteristics of MXene in silk fibroin solution and its regulation of mesoscopic structure and hydrophilicity of silk fibroin,layered structures with different compositions and hydrophilicities were obtained in one ***,ethanol and glutaraldehyde were added to construct a physical crystallization-chemical crosslinking dual stabilization structure in silk *** evaporator has the evaporation rate of 3.07 kg·m^(-2)·h^(-1) and the efficiency of 86.8%under 1 sun and maintains high evaporation performance under various extreme test conditions including vigorous washing,repeated compression,and high-intensity ultraviolet(UV)***,the evaporator performs well in practical application scenarios,its evaporation rate in the simulated Dead Sea seawater exceeds 2.13 kg·m^(-2)·h^(-1),and more than 99.9%of the salt,heavy metal ions,oil pollution,and dyes are purified.

关键词： silk fibroin MXene bioinspired integrated molding Janus structure solar vapor generation

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Central cell:the key to determine persistent pollen tube attraction or termination

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Science China(Life Sciences) 2024年第9期67卷 2030-2032页

作者： Jiang-guo meng Shi-Zhen Li Hong-Ju Li Center for Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation Integrative Science Center of Germplasm Creation Western China(Chongqing)Science CitySchool of Life SciencesSouthwest UniversityChongqing400715 China Key Laboratory of Seed Innovation Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China Center for Molecular Agrobiology Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China

Most eukaryotic species depend on sexual reproduction,characterized by fertilization,to produce a new *** process requires the transfer of sperm(male gamete),containing half of the genetic information,from the male to the egg cell(female gamete),which holds half of the maternal genome,within the female reproductive *** strategies have been evolved to ensure fertilization success in plants.

关键词： organs termination holds

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Controlling the Reactivity of IBA-N_(3)by Switching Halogen Salts:Providing a Universal Strategy for Haloazidation of Alkenes

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Chinese Journal of Chemistry 2024年第16期42卷 1839-1845页

作者： Chen-Xi Xia Xin-Lei Sun Jinfeng Zhang Yue Ren Yan Yu Kuai Wang Ling-guo meng Key Laboratory of Green and Precise Synthetic Chemistry and Applications Ministry of Education/School of Chemistry and Materials ScienceHuaibeiNormal UniversityHuaibeiAnhui 235000China

Although various routes have been reported for haloazidation,unavoidable problems exist,such as environmentally unfriendly monomer halogen,the need for in situ generation of unstable halogen azides(XN3),applicability to one type of haloazidation and inability to precisely control ***,we developed a universal strategy for haloazidation of alkenes through controlling the reactivity of IBA-N_(3) by switching halogen salts,allowing for the synthesis of a diversity of halogen azide *** studies have shown that by tuning the reactivity of IBA-N_(3) via switching halogen salts,different intermediates can be controllably produced to achieve regioselectivityand chemoselectivity in thehaloazidationof alkenes.

关键词： Haloazidation Alkene IBA-N_(3) Halogen salts Difunctionalization Selectivity Radicals Synthetic methods

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面向未来低碳道路养护的超薄罩面功能性研究综述

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Engineering 2024年第1期32卷 82-98页

作者： meng guo Rui Zhang Xiuli Du Pengfei Liu State Key Laboratory of Bridge Engineering Safety and Resilience Beijing University of TechnologyBeijing 100124China The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of TechnologyBeijing 100124China Institute of Highway Engineering RWTH Aachen UniversityAachen 52074Germany

Highway maintenance mileage reached 5.25 million kilometers in China by ***-thin overlay is one of the most commonly used maintenance technologies,which can significantly enhance the economic and environmental benefits of *** promote the low-carbon development of ultrathin overlays,this paper mainly studied the mechanism and influencing factors of several ultra-thin overlay ***,the skid resistance,noise reduction,rutting resistance,and crack resistance of ultrathin overlays were *** results indicated that the high-quality aggregates improved the skid and rutting resistance of ultra-thin overlay by 5%-20%.The optimized gradations and modified binders reduced noise of ultra-thin overlay by 0.4-6.0 *** high viscosity modified binders improved the rutting resistance of ultra-thin overlay by about 10%-130%.Basalt fiber improved the cracking resistance of ultra-thin overlay by more than 20%.Due to the thinner thickness and better road performance,the performance-based engineering cost of ultra-thin overlay was reduced by about 30%-40%compared with conventional ***,several environmentally friendly functions of ultra-thin overlay were investigated,including snow melting and deicing,exhaust gas purification and pavement *** lower thickness of ultra-thin overlay was conducive to the diffusion of chloride-based materials to the pavement ***,the snow melting effect of self-ice-melting was *** addition,the ultra-thin overlay mixture containing photocatalytic materials could decompose 20%-50%of the exhaust *** colored ultra-thin overlay was able to reduce the temperature of the pavement by up to 8.1℃.The temperature difference between the upper and lower surfaces of the ultra-thin overlay containing thermal resistance materials could reach up to 12.8℃.In addition,numerous typical global engineering applications of functional ultra-thin overlay were *** review can help better under

关键词： Road maintenance Ultra-thin overlay Snow melting and deicing Exhaust gas purification Pavement cooling Low-carbon

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Bird’s-eye view of recycled solid wastes in road engineering

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Journal of Road Engineering 2024年第2期4卷 93-150页

作者： Zhuangzhuang Liu Tengteng Feng Xingyi Zhu Jie Gao Kui Hu meng guo Fan Gu Feng Li School of Highway Chang'an UniversityXi'an 710064China Key Laboratory for Special Area Highway Engineering of Ministry of Education Chang'an UniversityXi'an 710064China Key Laboratory of Road and Traffic Engineering of Ministry of Education Tongji UniversityShanghai 200092China School of Civil Engineering and Architecture East China Jiaotong UniversityNanchang 330013China College of Civil Engineering and Architecture Henan University of TechnologyZhengzhou 450001China State Key Laboratory of Bridge Engineering Safety and Resilience Beijing University of TechnologyBeijing 100124China Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of TechnologyBeijing 100124China School of Traffic&Transportation Engineering Changsha University of Science and TechnologyChangsha 410114China School of Transportation Science and Engineering Beihang UniversityBeijing 102206China

Recent trends in road engineering have explored the potential of incorporating recycled solid wastes into infrastructures that including pavements,bridges,tunnels,and accessory *** utilization of solid wastes is expected to offer sustainable solutions to waste recycling while enhancing the performance of *** review provides an extensive analysis of the recycling of three main types of solid wastes for road engineering purposes:industrial solid waste,infrastructure solid waste,and municipal life solid *** solid wastes suitable for road engineering generally include coal gangue,fly ash,blast furnace slag,silica fume,and steel slag,*** solid wastes recycled in road engineering primarily consist of construction&demolition waste,reclaimed asphalt pavements,and recycled cement ***,recent exploration has extended to the utilization of municipal life solid wastes,such as incinerated bottom ash,glass waste,electronics waste,plastic waste,and rubber waste in road engineering *** recycled solid wastes are categorized into solid waste aggregates,solid waste cements,and solid waste fillers,each playing distinct roles in road *** of solid waste acting aggregates,cements,and fillers in road infrastructures were fully investigated,including their pozzolanic properties,integration effects to virgin materials,modification or enhancement solutions,engineering *** of these materials not only addresses the challenge of waste management but also offers environmental benefits aiming carbon neutral and contributes to sustainable infrastructure ***,challenges such as variability in material properties,environmental impact mitigation,secondary pollution to environment by leaching,and concerns regarding long-term performance need to be further *** these challenges,the recycled solid wastes hold immense potential in revolutionizing road construction

关键词： Road engineering Industrial solid waste Infrastructure solid waste Municipal life waste Recycled materials

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Development of a new cerebral ischemia reperfusion model of Mongolian gerbils and standardized evaluation system

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Animal Models and Experimental Medicine 2024年第1期7卷 48-55页

作者： Ying Wu Caijiao Hu Zhihui Li Feiyang Li Jianyi Lv meng guo Xin Liu Changlong Li Xueyun Huo Zhenwen Chen Lifeng Yang Xiaoyan Du School of Basic Medical Sciences Capital Medical UniversityBeijingChina Laboratory for Clinical Medicine Capital Medical UniversityBeijingChina College of Veterinary Medicine China Agricultural UniversityBeijingChina

Background:The Mongolian gerbil is an excellent laboratory animal for preparing the cerebral ischemia model due to its inherent deficiency in the circle of ***,the low incidence and unpredictability of symptoms are caused by numerous complex variant types of the ***,the lack of an evaluation system for the cer-ebral ischemia/reperfusion(I/R)model of gerbils has shackled the application of this ***:We created a symptom-oriented principle and detailed neurobehavioral scoring *** different time points of reperfusion,we analyzed the alteration in locomotion by rotarod test and grip force score,infarct volume by triphenyltetrazo-lium chloride(TTC)staining,neuron loss using Nissl staining,and histological charac-teristics using hematoxylin-eosin(H&E)***:With a successful model rate of 56%,32 of the 57 gerbils operated by our method harbored typical features of cerebral I/R injury,and the mortality rate in the male gerbils was significantly higher than that in the female *** suc-cessfully prepared I/R gerbils demonstrated a significant reduction in motility and grip strength at 1 day after reperfusion;formed obvious infarction;exhibited typi-cal pathological features,such as tissue edema,neuronal atrophy and death,and vacuolated structures;and were partially recovered with the extension of reperfu-sion ***:This study developed a new method for the unilateral common carotid artery ligation I/R model of gerbil and established a standardized evaluation system for this model,which could provide a new cerebral I/R model of gerbils with more practical applications.

关键词： ischemia/reperfusion Mongolian gerbil standardized model system unilateral carotid occlusion

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Non-Gaussian quantum states generated via quantum catalysis and their statistical properties

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Chinese Physics B 2024年第4期33卷 332-337页

作者：张晓燕杨春燕王继锁孟祥国 Shandong Provincial Key Laboratory of Laser Polarization and Information Technology School of Physics and Physical EngineeringQufu Normal UniversityQufu 273165China Shandong National Secondary Vocational School Qingzhou 262500China School of Basic Medical Sciences Weifang Medical UniversityWeifang 261000China

A new kind of non-Gaussian quantum catalyzed state is proposed via multiphoton measurements and two-mode squeezing as an input of thermal *** characteristics of the generated multiphoton catalysis output state depends on the thermal parameter,catalyzed photon number and squeezing *** then analyze the nonclassical properties by examining the photon number distribution,photocount distribution and partial negativity of the Wigner *** findings indicate that nonclassicality can be achieved through the implementation of multiphoton catalysis operations and modulated by the thermal parameter,catalyzed photon number and squeezing parameter.

关键词： two-mode squeezing multiphoton catalysis nonclassicality Wigner function

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顺序主导和方向驱动下基于点边特征的人体动作识别方法

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控制与决策 2024年第9期39卷 3090-3098页

作者：苏本跃郭梦娟朱邦国盛敏安庆师范大学计算机与信息学院安徽安庆246133 铜陵学院数学与计算机学院安徽铜陵244061 安庆师范大学数理学院安徽安庆246133

人体运动是肢体运动方向、关节活动顺序以及动作幅度相互协调的过程.然而,现有方法往往直接对原始3D骨骼关节点信息进行建模,容易忽略肢体关节活动的顺序关系、运动方向性以及动作幅度变化影响.因此,提出一种顺序主导和方向驱动下基于... 详细信息

人体运动是肢体运动方向、关节活动顺序以及动作幅度相互协调的过程.然而,现有方法往往直接对原始3D骨骼关节点信息进行建模,容易忽略肢体关节活动的顺序关系、运动方向性以及动作幅度变化影响.因此,提出一种顺序主导和方向驱动下基于点边特征的骨骼卷积神经网络,通过刻画人体关节点运动顺序、帧间距离和骨骼边方向向量等特征对人体动作分类识别.该网络包含顺序主导单元和方向驱动单元.顺序主导单元对骨骼边末端关节点进行建模,利用关节点的排列方式、帧间距离信息对关节活动顺序和肢体变化幅度进行表征.方向驱动单元利用骨骼边方向向量信息表征肢体运动的方向性.最后,将顺序主导单元与方向驱动单元进行特征融合,对人体日常行为动作进行分类识别.实验结果表明,在两个大型数据集NTU-RGB+D60和NTU-RGB+D120上的实验结果分别较基准方法提升了2.6%、3.5%和5.9%、6.1%.因此,所提出方法能有效利用多特征之间的协同互补性对人类日常行为运动进行深层次刻画,提高人体动作识别的精度.

关键词：人体动作识别骨骼数据骨骼边方向向量有序关节点帧间距离卷积神经网络

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