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Characteristics of bioaerosols under high-ozone periods,haze episodes,dust storms,and normal days in Xi'an,China

Particuology 2024年第7期90卷 140-148页

作者： yiming yang Liu yang Xiaoyan Hu Zhenxing Shen Department of Environmental Science and Engineering Xi’an Jiaotong UniversityXi’an710049China Key Lab of Aerosol Chemistry&Physics SKLLQGInstitute of Earth EnvironmentChinese Academy of SciencesXi’an710049China

The characteristics of bioaerosols and their effects on human beings'health have become a major public concern in the recent *** study compared the characteristics of bioaerosols under different types of pollution(high-ozone[HO]episodes,haze episodes,and dust storms[DSs]),with those of bioaerosols on normal days(NDs)in Xi'an,*** concentrations,diurnal variations,and size distribution of bacteria,fungi,and total airborne microbes(TAMs)were *** results showed that the bacterial and fungal concentrations were the highest during DSs and on NDs,reaching 425.2 and 956.9 colony-forming units/m^(3),*** concentration of TAMs was the highest during HO episodes,reaching 10.7×10^(6)cells/m^(3),which was significantly higher than that during the other *** maximum concentrations of bacteria and fungi during HO episodes were observed in the morning,while they appeared separately in the morning and evening during haze *** and TAMs during DSs reached peak concentrations in the morning and evening,which is opposite to the particulate matter(PM)distribution *** NDs,temperature and relative humidity had significant effects on *** size distributions of airborne bacteria exhibited bimodal patterns,whereas unimodal distributions were observed for *** mainly attached in fine particles(<2.1μm)with proportions of 67.4%and 60.5%during haze episodes and DSs,respectively,which means that fungi were easily penetrated into the human respiratory *** evaluation of influence factors revealed that PM_(2.5) and PM10 had negative effects on fungal concentration during DSs,and ozone concentration and temperature were inversely correlated with fungal concentration during HO *** results provide valuable reference data for elucidating the formation and evolution of bioaerosols under different types of pollution.

关键词： Bacteria Fungi Total airborne microbe Different air pollution types Influence factors

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BDSec:Security Authentication Protocol for BeiDou-Ⅱ Civil Navigation Message

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China Communications 2024年第6期21卷 206-218页

作者： Wu Zhijun Zhang Yuan yang yiming Wang Peng Yue Meng School of Safety Science and Engineering Civil Aviation University of ChinaTianjin 300300China School of Electronic Information and Automation Civil Aviation University of ChinaTianjin 300300China

Due to the lack of authentication mechanism in BeiDou navigation satellite system(BDS),BD-Ⅱ civil navigation message(BDⅡ-CNAV) are vulnerable to spoofing attack and replay *** solve this problem,we present a security authentication protocol,called as BDSec,which is designed by using China’s cryptography Shangyong Mima(SM) series algorithms,such as SM2/4/9 and Zu Chongzhi(ZUC)*** BDSec protocol,both of BDⅡ-CNAV and signature information are encrypted using the SM4 algorithm(Symmetric encryption mechanism).The encrypted result is used as the subject authentication *** protocol applies SM9 algorithm(Identity-based cryptography mechanism) to protect the integrity of the BDⅡ-CNAV,adopts the SM2 algorithm(Public key cryptosystem) to guarantee the confidentiality of the important session information,and uses the ZUC algorithm(Encryption and integrity algorithm) to verify the integrity of the message authentication serial number and initial information and the information in authentication initialization sub-protocol *** results of the SVO logic reasoning and performance analysis show that BDSec protocol meets security requirements for the dual user identity authentication in BDS and can realize the security authentication of BDⅡ-CNAV.

关键词： BDII civil navigation messages(BDIICNAV) BeiDou navigation satellite system(BDS) identity-based cryptography mechanism navigation message authentication protocol(BDSec)

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Enhancing Multi-agent Coordination via Dual-channel Consensus

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Machine Intelligence Research 2024年第2期21卷 349-368页

作者： Qingyang Zhang Kaishen Wang Jingqing Ruan yiming yang Dengpeng Xing Bo Xu Institute of Automation Chinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China

Successful coordination in multi-agent systems requires agents to achieve *** works propose methods through information sharing,such as explicit information sharing via communication protocols or exchanging information implicitly via behavior ***,these methods may fail in the absence of communication channels or due to biased *** this work,we propose to develop dual-channel consensus(DuCC)via contrastive representation learning for fully cooperative multi-agent systems,which does not need explicit communication and avoids biased *** comprises two types of consensus:temporally extended consensus within each agent(inner-agent consensus)and mutual consensus across agents(inter-agent consensus).To achieve DuCC,we design two objectives to learn representations of slow environmental features for inner-agent consensus and to realize cognitive consistency as inter-agent *** DuCC is highly general and can be flexibly combined with various MARL *** extensive experiments on StarCraft multi-agent challenge and Google research football demonstrate that our method efficiently reaches consensus and performs superiorly to state-of-the-art MARL algorithms.

关键词： Multi-agent reinforcement learning contrastive representation learning consensus multi-agent cooperation cognitive consistency

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Manipulating Nanowires in Interconnecting Layer for Efficient Tandem Organic Photovoltaics

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Chinese Journal of Chemistry 2024年第4期42卷 377-383页

作者： Yanjie Tang Jiaming Fu Hao Li Du Hyeon Ryu Won Suk Shin Jianqi Zhang Yi yang yiming yang Deyuan Li Zhong Zheng Shaoqing Zhang Jianhui Hou School of Chemistry and Biology Engineering University of Science and Technology Beijing(USTB)Beijing100083 China State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of Sciences(ICCAS)Beijing100190 China Energy Materials Research Center Korea Research Institute of Chemical Technology(KRICT)Advanced Materials&Chemical EngineeringUniversity of Science&Technology(UST)Korea The National Center for Nanoscience and Technology(NCNST) Beijing100190 China University of Chinese Academy of Sciences Beijing(UCAS) Beijing100049 China China Railway Resources Group Survey and Design Co.Ltd. LangfangHebei065000 China

Owing to the function of manipulating light absorption distribution,tandem organic solar cells containing multiple sub-cells exhibit high power conversion ***,there is a substantial challenge in precisely controlling the inter-subcells carrier migration which determines the balance of charge transport across the entire *** conductivity of"nanowires"-like conducting channel in interconnecting layer between sub-cells should be improved which calls for fine engineering on the morphology of polyelectrolyte in interconnecting ***,we develop a simple method to effectively manipulating the domains of conductive components in commercially available polyelectrolyte PEDOT:*** use of poor solvent could effectively modify the configuration of polystyrene sulfonic acid and thus the space for conductive *** on our strategy,the insulated shells wrapping conductive domains are thinned and the efficiencies of tandem organic solar cells are *** believe our method might provide guidance for the manufacture of tandem organic solar cells.

关键词： Tandem organic solar cells Power conversion efficiency interconnecting layer Tunneling junction Interfacial layers Conformationanalysis π-πstacking Donor-acceptorsystems

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Defect-modulated synthesis and optoelectronic properties in chemical vapor deposited CsPbBr_(3) microplates

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Nano Research 2024年第5期17卷 4610-4615页

作者： Yanan Bao Hengshan Wang Meiqi An Huayi Tang Jing Li Jianliang Li Conghui Tan Yingmin Luo Jiao Xu yiming yang School of Microelectronics Dalian University of TechnologyDalian 116024China Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024China

The remarkable optoelectronic features of halide perovskite promote their potential applications in semiconductor devices beyond solar cells,which require high-quality single crystals with controlled defect ***,we investigated the synthesis mechanism of chemical vapor deposited single-crystalline all-inorganic perovskite microplates(MPs),and reported a defect-modulated photocurrent which is closely related to the growth sequence of the *** MP synthesis initiates from island-like nano-disks,and subsequently transits to a layer-by-layer fashion,resulting in a defect-rich area at the center of the *** elevated temperatures,these central defects may be thermally activated and become highly mobile,leading to photoluminescence quenching and degression of local and overall optoelectronic attributes,as evidenced by the spatial resolved optical and electrical scanning probe ***,this work shines light on the formation,proliferation and dynamics of defects in perovskites,and offers guidance for preparation of high-quality perovskites micro-crystals for functional semiconductor devices with high temperature stability.

关键词： halide perovskites nanomaterials optoelectronics scanning photocurrent microscope chemical vapor deposition

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Research on Sports Public Service Supply in the Chengdu-Chongqing Twin-City Economic Circle under the Background of Regional Economic Development

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Proceedings of Business and Economic Studies 2024年第2期7卷 106-113页

作者： yiming yang Yun Liu Yu Huang Chongqing Vocational College of Applied Technology Chongqing 401520China

Using literature,questionnaires,interviews,and mathematical statistics to investigate the current situation of sports public services in the Chengdu-Chongqing Twin-city Economic *** results show that there are some problems in Chengdu-Chongqing sports public services,such as big difference in the development level of supply between urban and rural areas,low supply level,low efficiency,supply mechanism defect,lack of social sports instructors,an outstanding contradiction between the quality of sports public service and residents’*** address the problems,government departments should accelerate the transformation of government functions,improve the relevant regulations and systems,increase the investment in sports public services,improve the quality of supply,cultivate the backbone team,integrate resources,and combine the national characteristics with regional characteristics,take into account the personalized needs of the residents,combine the sports public services with intelligence,and build the service system of“Internet+Fitness.”

关键词： Regional economy Chengdu-Chongqing Twin-city Economic Circle Sports demand Sports public service Current supply situation

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藏南温泉稀有金属来源及其富集机制:以羊易热泉为例

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岩石学报 2024年第5期40卷 1669-1689页

作者：徐强纪伟强杨一鸣李家亮中国科学院地质与地球物理研究所岩石圈演化国家重点实验室北京100029 中国科学院大学地球与行星科学学院北京100049

在全球科技与工业飞速发展的背景下,对稀有金属的需求日益增长,使得其研究显得尤为重要。青藏高原南部地区地热资源丰富,地热水中稀有金属富集,为研究地热系统中稀有金属的来源和成因提供了独特的研究平台。本研究专注于青藏高原南部地... 详细信息

在全球科技与工业飞速发展的背景下,对稀有金属的需求日益增长,使得其研究显得尤为重要。青藏高原南部地区地热资源丰富,地热水中稀有金属富集,为研究地热系统中稀有金属的来源和成因提供了独特的研究平台。本研究专注于青藏高原南部地热系统中稀有金属元素特征,特别是Li、Rb、Cs等元素极度富集的现象。该现象已经引起了地质学界的广泛关注,但目前还缺乏一个全面的成因模型来阐明这些稀有金属的来源及其富集机制。因此,本文选择了位于亚东-谷露裂谷中段的羊易热泉及其周边岩浆岩作为研究对象,探究羊易热泉水化学特征,厘定羊易地区不同时代岩浆岩源区组成和演化特征,并揭示藏南温泉成因模式与稀有金属富集的关系。通过对羊易热泉的水化学及其周围岩浆岩的岩石地球化学分析,本研究得出了以下认识:(1)羊易热泉中稀有金属元素含量极度富集,且Cs含量高于Rb含量;(2)对羊易地区不同时代岩浆岩的Sr-Nd同位素分析显示,随着时间的推移,岩浆源区的同位素组成趋向富集,这暗示了印度古老大陆物质的贡献在逐渐增加;(3)热泉中Sr元素可能主要来自于水岩相互作用,而Li、Rb、Cs等元素更多源于高演化岩浆流体的贡献;(4)稀有金属元素最初在印度大陆地壳部分熔融形成的长英质岩浆中富集,随着岩浆演化,其流体进一步富集了这些元素,这是藏南温泉稀有金属富集的关键因素。本研究确定藏南温泉中Li、Rb、Cs等稀有金属元素主要来源于岩浆流体的注入,并建立起藏南温泉成因模式与稀有金属富集之间的关系。这不仅提供了对藏南地区温泉稀有金属富集现象的新见解,同时也为理解全球其他地区地热系统中稀有金属的富集机制提供了重要参考。

关键词：稀有金属藏南热泉水岩相互作用岩浆演化地热资源

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基于自适应系数的双馈风电机组调频控制策略及参数优化

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电气应用 2024年第5期43卷 40-49页

作者：杨易茗现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学) 吉林吉林132012

风电联网比例逐年提高,然而传统风电机组不具备双向调频的能力,仅靠系统中火电机组调节系统的供需关系已经无法满足频率质量要求,风电机组参与调频成为一种有效的频率调节手段。在分析双馈风力发电机频率双向调节的基础上,考虑系统运行... 详细信息

风电联网比例逐年提高,然而传统风电机组不具备双向调频的能力,仅靠系统中火电机组调节系统的供需关系已经无法满足频率质量要求,风电机组参与调频成为一种有效的频率调节手段。在分析双馈风力发电机频率双向调节的基础上,考虑系统运行状态整定了惯性系数和下垂系数。提出了变系数调频控制策略,采用粒子群算法优化了风电机组参与调频的减载率。仿真结果表明,所提出的控制策略和减载率优化方法,在频率质量和经济上都具有明显的优势。

关键词：双馈风力发电机虚拟惯性减载控制频率调整自适应系数

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话语语境、内容与方式对研究生思政课教师话语创新的影响——一个链式多重中介模型的检验

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研究生教育研究 2024年第1期 65-73页

作者：熊华军杨一鸣西北师范大学教育科学学院兰州730070

基于哈贝马斯的交往行为理论,探讨新时代研究生思政课教师的话语创新,采用结构方程模型(SEM)方法,从问卷调查入手,探究哈贝马斯交往行为理论中话语语境、话语内容和话语方式对教师话语体系创新的影响。结果表明,三种因素均对研究生思政... 详细信息

基于哈贝马斯的交往行为理论,探讨新时代研究生思政课教师的话语创新,采用结构方程模型(SEM)方法,从问卷调查入手,探究哈贝马斯交往行为理论中话语语境、话语内容和话语方式对教师话语体系创新的影响。结果表明,三种因素均对研究生思政课教师话语创新产生正向影响,三者之间均具有双向正向影响,话语内容和话语方式在话语语境与创新效果间起链式中介作用。据此,从拓展教学形式、构建话语体系、扎根核心原则、重视话语整体四个方面提出促进新时代研究生思政课教师话语创新的具体建议。

关键词：结构方程模型思政课教师话语

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中国零能耗建筑领域的发展轨迹与前沿趋势——基于CiteSpace知识图谱的定量分析与综合评述

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住宅科技 2024年第5期44卷 6-12页

作者：杨益鸣邓丰同济大学建筑与城市规划学院

文章采用文献计量学分析方法,通过CiteSpace知识图谱对2002—2023年发表的“中国零能耗建筑”相关文献进行筛选和分析,探讨20多年来中国零能耗建筑领域的发展现状、挑战与机遇,以及对未来的展望。研究发现,零能耗建筑的研究自2002年起... 详细信息

文章采用文献计量学分析方法,通过CiteSpace知识图谱对2002—2023年发表的“中国零能耗建筑”相关文献进行筛选和分析,探讨20多年来中国零能耗建筑领域的发展现状、挑战与机遇,以及对未来的展望。研究发现,零能耗建筑的研究自2002年起逐渐增多,尤其在2018年后,随着相关政策的完善和技术标准的制定,研究数量呈现爆发式增长趋势;研究热点主要集中在节能技术与设计、性能评估与优化及建筑材料与构造优化等方面。然而,零能耗建筑的实际应用和推广仍面临挑战,研究领域的集中度较高,缺乏跨学科合作,且在不同地区的执行力度和技术实用性上存在差异。未来研究应更加注重技术创新与应用推广、经济性与政策支持,以及跨学科合作与创新,以促进零能耗建筑的广泛应用和可持续发展。

关键词：零能耗建筑近零能耗建筑知识图谱文献计量法

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