检索结果-南通市图书馆

维普期刊数据库博看期刊

Self-organized search-attack mission planning for UAV swarm based on wolf pack hunting behavior

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2021年第6期32卷 1463-1476页

作者： HU Jinqiang WU Husheng zhan.Renjun MENASSEL Rafik ZHOU Xuanwu School of Equipment Management and Support Armed Police Force Engineering UniversityXi’an 710086China Department of Mathematics and Computer Science Tebessa UniversityTebessa 12002Algeria Foundation Department Armed Police Command CollegeTianjin 300250China

Cooperative search-attack is an important application of unmanned aerial vehicle(UAV)swarm in military *** coupling between path planning and task allocation,the heterogeneity of UAVs,and the dynamic nature of task environment greatly increase the complexity and difficulty of the UAV swarm cooperative search-attack mission planning *** by the collaborative hunting behavior of wolf pack,a distributed selforganizing method for UAV swarm search-attack mission planning is ***,to solve the multi-target search problem in unknown environments,a wolf scouting behavior-inspired cooperative search algorithm for UAV swarm is ***,a distributed self-organizing task allocation algorithm for UAV swarm cooperative attacking of targets is proposed by analyzing the flexible labor division behavior of *** abstracting the UAV as a simple artificial wolf agent,the flexible motion planning and group task coordinating for UAV swarm can be realized by *** effectiveness of the proposed method is verified by a set of simulation experiments,the stability and scalability are evaluated,and the integrated solution for the coupled path planning and task allocation problems for the UAV swarm cooperative search-attack task can be well performed.

关键词： search-attack mission planning unmanned aerial vehicle(UAV)swarm wolf pack hunting behavior swarm intelligence labor division

基于小波分析的高压隔离开关故障检测方法研究

在线全文

学校读者我要写书评

暂无评论

自动化技术与应用 2024年第3期43卷 19-22,42页

作者：公多虎詹仲强葛志杰吴天博陈文涛国网新疆电力有限公司电力科学研究院新疆乌鲁木齐830000

高压隔离开关在高压配电网中起到了重要的故障切断作用,能有效避免故障影响范围。该装置的工作状态直接关系到配电网工作的可靠性。为此研究一种基于小波分析的高压隔离开关故障检测方法。该方法利用加速度传感器采集高压隔离开关振动信... 详细信息

高压隔离开关在高压配电网中起到了重要的故障切断作用,能有效避免故障影响范围。该装置的工作状态直接关系到配电网工作的可靠性。为此研究一种基于小波分析的高压隔离开关故障检测方法。该方法利用加速度传感器采集高压隔离开关振动信号,利用小波分析分解振动信号,实现去噪同时,提取信号的能量熵特征。以特征为输入,利用优化BP神经网络构建检测模型,实现高压隔离开关故障检测。结果表明:所研究方法应用下,得出20个高压隔离开关中4个存在故障,其中3号开关存在拒动故障、10号开关和15号开关存在绝缘故障、19号开关存在拒动故障,证明了检测方法的有效性。

关键词：小波分析振动信号高压隔离开关能量熵优化BP神经网络故障检测方法

同方期刊数据库

17.1%-Efficiency organic photovoltaic cell enabled with two higher-LUMO-level acceptor guests as the quaternary strategy

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2020年第4期63卷 490-496页

作者： Kun Li Yishi Wu Xuemei Li Hongbing Fu Chuan.ang zhan Department of Chemistry Capital Normal UniversityBeijing 100048China School of Chemistry&Chemical Engineering Linyi UniversityLinyi 276000China CAS Key Laboratory of Photochemistry Institute of ChemistryChinese Academy of SciencesBeijing 100190China

Quaternary blended organic solar cells utilize four blended material components(one donor plus three acceptors, two donors and two acceptors, or three donors plus one acceptor) as the active layer materials. The use of four material components allows us to have more material selections and more mechanism choices to improve the photon-to-electron conversion efficiency. In this contribution, we present a new case of quaternary material system, that shows 17.1% efficiency obtained by adding IDIC and PC71BM as the guest acceptors of the host binary of PM6:Y6. The lowest unoccupied molecular orbital(LUMO) levels of IDIC and PC71BM are both higher than that of Y6, which is one reason to obtain increased open-circuit voltage(Voc) in the quaternary device. Upon introduction of IDIC and PC71BM as the acceptor guests, the hole and electron mobilities are both increased, which contributes to the increased short-circuit current-density(Jsc). Effects of the weight ratios of the three acceptor components are investigated, which demonstrates that the increased hole and electron mobilities, the accelerated hole-transfer, and the reduced monomolecular recombination are the factors contributing to the increased Jscand fill-factor. This case of quaternary device demonstrates the applicability of the quaternary strategy in increasing the device functions and hence the efficiencies in the field of organic photovoltaic cells.

关键词： quaternary solar cell organic photovoltaic small-molecule acceptor nonfullerene fullerene

Recovery of zinc from Zn-Al-Fe alloys by gas pressure filtration

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2020年第11期27卷 1322-1330页

作者： Tian-yang Li Zhe Wang Lei Guo zhan.cheng Guo State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The recovery of zinc from galvanizing dross and the removal of iron contained dross particles by gas pressure filtration were investigated using the model of Zn-Fe-Al *** majority of molten zinc was separated after filtration,and the residue intercepted by the filter consisting mostly of dross *** effects of the pressure differential(p),separation temperature(T)and alloy composition on the zinc recovery and iron removal were *** p=0.30 MPa and T=723 K,86.2 wt.%zinc was recovered from the Zn-4Al-2Fe alloy,and up to 99.9 wt.%of the iron was concentrated in the *** a higher pressure differential led to the improved filtration efficiency,and the desired separation temperature was about 723 *** aluminum content in the Zn-Al-Fe alloy had little effect on separation efficiency,whereas increasing the iron content led to a decrease in the separation *** findings demonstrate the potential of the gas pressure filtration method for the recovery of zinc from galvanizing dross.

关键词： Galvanizing dross Gas pressure filtration Zinc recovery Iron removal Separation

不同品种烟草患黑胫病根际土壤真菌群落结构研究

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

西南农业学报 2024年第7期37卷 1494-1503页

作者：程凌寒张裕棠方宇刘玲玲蔡永占刘冬梅韩小女余磊齐颖刘佳妮昆明学院/云南省都市特色农业工程技术研究中心昆明650214 合肥高尔生命健康科学研究院有限公司合肥230088 云南省烟草公司曲靖市公司云南曲靖655002 云南省宣威市农业技术推广中心云南宣威655499

[目的]揭示不同品种患病根际土壤真菌中的差异显著物种,探讨根际土壤真菌与不同品种烟草互作关系,为品种抗性机理研究以及生物防治提供参考。[方法]采用Illumina MiSeq高通量测序技术,分析云南省8个主栽烟草品种的患病植株根际土壤真菌... 详细信息

[目的]揭示不同品种患病根际土壤真菌中的差异显著物种,探讨根际土壤真菌与不同品种烟草互作关系,为品种抗性机理研究以及生物防治提供参考。[方法]采用Illumina MiSeq高通量测序技术,分析云南省8个主栽烟草品种的患病植株根际土壤真菌的群落结构组成与多样性。[结果]8个品种的患病根际土壤真菌OTU丰度值分布在822~1126,各品种间根际土壤真菌多样性与丰富度指数存在显著差异,其中品种K326、云105、云87和云99显著高于其他品种。在门水平上,各品种患病根际土壤真菌主要以子囊菌门(Ascomycota)、被孢霉门(Mortierellomycota)和担子菌门(Basidiomycota)为优势菌门。在属水平上,各处理组主要以Microidium属、镰孢菌属(Fusarium)、腐质霉属(Humicola)、被孢霉属(Mortierella)和链格孢属(Alternaria)等为优势菌属。LEFSe显著差异分析表明:腐质霉属、假丝酵母属(Candida)、小不整球壳属(Plectosphaerella)、链格孢属、丝葚霉属(Papulaspora)、镰孢菌属、Boeremia属、被孢霉属、赤霉菌属(Gibberella)是不同品种烟草患病根际土壤的重要差异显著物种。[结论]不同品种烟草的患病根际土壤真菌群落结构与多样性存在显著差异,且显著差异物种的分布与品种抗性存在一定联系。对黑胫病具有较高抗性的品种(云97、K326、云100和云87)中以有益菌属为主,而在感病和中抗品种(红大、云105、云116和云99)中则聚集了部分病原菌。

关键词：烟草黑胫病品种根际土壤真菌群落

同方期刊数据库博看期刊

HL-2A装置相衬成像系统的安全连锁与远程监控

在线全文

学校读者我要写书评

暂无评论

核聚变与等离子体物理 2024年第2期44卷 157-162页

作者：龚少博余羿王志斌王华杰袁金榜刘灏吴婷龙婷陈逸航柯锐聂林王占辉孙爱萍许敏核工业西南物理研究院成都610041 中山大学珠海528478

通过在相衬成像系统光路中引入电控安全快门控制激光输出,并使用延迟电路实现了安全快门与HL-2A放电运行的同步触发,保障了诊断系统的安全运行,安全快门时间响应为26ms,其抖动误差1ms;利用四象限传感器实现了激光束斑位置的实时监测,获... 详细信息

通过在相衬成像系统光路中引入电控安全快门控制激光输出,并使用延迟电路实现了安全快门与HL-2A放电运行的同步触发,保障了诊断系统的安全运行,安全快门时间响应为26ms,其抖动误差1ms;利用四象限传感器实现了激光束斑位置的实时监测,获得了HL-2A装置垂直和水平方向的振动数据。所发展的电控快门技术和激光实时监测系统不仅能够大幅提高相衬成像系统的安全性和可靠性,对于HL-2A/2M装置诊断系统的发展和完善也具有重要意义。

关键词：相衬成像系统电控快门激光实时监测

Investigation of gas-solids flow hydrodynamics in a cold model of a dual fluidised bed gasifier using electrical capacitance tomography sensors

在线全文

学校读者我要写书评

暂无评论

Particuology 2020年第4期18卷 193-204页

作者： zhan.Luo Yonglei Lin Qiuya Tu Wuqiang Yang Haigang Wang Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Department of Electrical and Electronic Engineering University of ManchesterManchesterM139PLUK

The flow characteristics of a dual fluidised bed gasifier(DFBG)are more complex than those of a single fluidised bed *** stable operation and appropriate control,a cold DFBG test facility with both an upper and a lower U-valve was built,and electrical capacitance tomography(ECT)sensors were installed with pressure transducers to investigate the effects of operating conditions on gas-solids flow *** operating parameters included gas velocities in the riser and in the bubbling fluidised bed,aeration velocity in the lower U-valve,bed material inventory,and particle *** is the first time that ECT was applied in different flow zones of a dual fluidised bed gasifier *** experimental results indicated that ECT in the recycle chamber could monitor the performance of the lower U-valve under different operating conditions for early detection of gas shortcut from the riser to the bubbling *** main flow regimes in the riser and the differences between the reactors were identified by two sets of ECT sensors with pressure ***,the effects of the operating conditions on the pressure drop in different parts of the DFBG was investigated.

关键词： Dual fluidised bed gasifier Hydrodynamics Electrical capacitance tomography Flow regime identification

MicrobiotaProcess:A comprehensive R package for deep mining microbiome

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Innovation 2023年第2期4卷 48-58,47页

作者： Shuan.bin Xu Li zhan.Wenli Tang Qianwen Wang Zehan Dai Lang Zhou Tingze Feng Meijun Chen Tianzhi Wu Erqiang Hu Guangchuan. Yu Division of Laboratory Medicine Microbiome Medicine CenterZhujiang HospitalSouthern Medical UniversityGuangzhou 510515China Department of Bioinformatics School of Basic Medical SciencesSouthern Medical UniversityGuangzhou 510515China

The data output from microbiome research is growing at an accelerating rate,yet mining the data quickly and efficiently remains *** is still a lack of an effective data structure to represent and manage data,as well as flexible and composable analysis *** response to these two issues,we designed and developed the MicrobiotaProcess *** provides a comprehensive data structure,MPSE,to better integrate the primary and intermediate data,which improves the integration and exploration of the downstream *** this data structure,the downstream analysis tasks are decomposed and a set of functions are designed under a tidy *** functions independently perform simple tasks and can be combined to perform complex tasks.

关键词： methods. structure integrate

Axial gradient excitation accelerates volumetric imaging of two-photon microscopy

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2022年第3期10卷 687-696页

作者： Yufeng Gao Xianyuan Xia Lina Liu Ting Wu Tingai Chen Jia Yu Zhili Xu Liang Wang Fei Yan Zhuo Du Jun Chu Yang zhan.Bo Peng Hui Li Wei Zheng Research Center for Biomedical Optics and Molecular Imaging Shenzhen Key Laboratory for Molecular ImagingGuangdong Provincial Key Laboratory of Biomedical Optical Imaging TechnologyShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China CAS Key Laboratory of Health Informatics Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Paul C.Lauterbur Research Center for Biomedical Imaging Institute of Biomedical and Health EngineeringShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China Key Laboratory of Genetic Network Biology Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China Brain Cognition and Brain Disease Institute Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Centre for Micro Nano Systems and Bionic Medicine Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

Two-photon excitation fluorescence microscopy(TPM),owing to its capacity for subcellular resolution,intrinsic optical sectioning,and superior penetration depth in turbid samples,has revolutionized biomedical ***,its layer-by-layer scanning to form a three-dimensional image inherently limits the volumetric imaging speed and increases phototoxicity *** this study,we develop a gradient excitation technique to accelerate TPM volumetric *** axial positions of the fluorophores can be decoded from the intensity ratio of the paired images obtained by sequentially exciting the specimen with two axially elongated two-photon beams of complementary gradient *** achieved a 0.63μm axial localization precision and demonstrate the flexibility of the gradient TPM on various sparsely labeled samples,including bead phantoms,mouse brain tissues,and live *** with traditional TPM,our technique improves volumetric imaging speed(by at least sixfold),decreases photobleaching(i.e.,less than 2.07±2.89%in 25 min),and minimizes photodamages.

关键词： excitation gradient photon