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RSSI和距离区间映射的测距方法

电子科技大学学报 2012年第4期41卷 522-526页

作者：王缓缓胡爱娜黄河科技学院物联网传感技术及其应用郑州市重点实验室郑州450006

无线传感器网络中传统的测距方法是建立接收信号能量(RSSI)和距离之间一对一的映射,没有很好地考虑RSSI随机变化较大的问题,测距误差较大。该文提出了建立RSSI和距离区间之间一对多的映射关系的测距方法。在离线阶段,建立RSSI和距离区... 详细信息

无线传感器网络中传统的测距方法是建立接收信号能量(RSSI)和距离之间一对一的映射,没有很好地考虑RSSI随机变化较大的问题,测距误差较大。该文提出了建立RSSI和距离区间之间一对多的映射关系的测距方法。在离线阶段,建立RSSI和距离区间之间的映射关系数据库;在线测量阶段,用测得的若干个RSSI值查询数据库,将得到的若干个距离区间进行加权求和得到一个新的距离区间,再取该区间的质心进行测距。仿真结果表明,该方法具有较高的测距精度。

关键词：数据库距离区间误差映射测距 RSSI

The hard X-ray nanoprobe beamline at the SSRF

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Nuclear Science and Techniques 2024年第7期35卷 79-88页

作者： Yan He Hui Jiang Dong-Xu Liang Zhi-Sen Jiang Huai-na Yu Hua Wang Cheng-Wen Mao Jia-nan Xie ai-Guo Li Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai201210China

The hard X-ray nanoprobe beamline BL13U is a phase-Ⅱ beamline project at the Shanghai Synchrotron Radiation *** beamline aims to enable comprehensive experiments at high spatial resolutions ranging from 50 to 10 nm. The X-ray energy range of the beamline, 5–25 keV, can detect most elements in the periodic table. Two operating modes were designed to accommodate the experimental requirements of high-energy resolution or high photon flux, respectively. X-ray nanofluorescence, nanodiffraction, and coherent diffraction imaging are developed as the main experimental techniques for BL13U. This paper describes the beamline optics, end station configurations, experimental methods under development, and preliminary test results. This comprehensive overview aims to provide a clear understanding of the beamline capabilities and potential applications.

关键词： Shanghai synchrotron radiation facility Hard X-ray nanoprobe X-ray nanofocusing

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基于多目标优化的模糊滑模变结构控制及应用

中南大学学报（自然科学版） 2006年第6期37卷 1149-1154页

作者：杨勇文丹罗安覃爱娜长沙理工大学汽车与机械工程学院湖南长沙410076 长沙大学计算机科学与技术系湖南长沙410003 湖南大学电气与信息工程学院湖南长沙410082 中南大学信息科学与工程学院湖南长沙410083

结合滑模变结构控制和模糊逻辑技术,提出一种基于多目标优化的模糊滑模变结构控制。以滑模开关函数及其变化量作为模糊调节器的输入量,滑模面边界层的宽度作为输出量,设计一个二维模糊边界层宽度调节器;以稳态误差和切换频率构造多目标... 详细信息

结合滑模变结构控制和模糊逻辑技术,提出一种基于多目标优化的模糊滑模变结构控制。以滑模开关函数及其变化量作为模糊调节器的输入量,滑模面边界层的宽度作为输出量,设计一个二维模糊边界层宽度调节器;以稳态误差和切换频率构造多目标优化函数,运用多目标优化算法对滑模变结构控制器参数进行优化。应用于液压位置系统控制的仿真结果表明,所提出的控制方法能缓解滑模变结构控制高稳态精度与平滑抖振之间的矛盾,提高液压位置滑模变结构控制系统的综合性能。

关键词：模糊滑模变结构控制边界层调节多目标优化抖振削弱稳态精度液压位置系统

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煤矿企业信息网络安全的设计与实现

煤炭技术 2013年第10期32卷 135-136页

作者：胡爱娜黄河科技学院信息工程学院郑州450063

随着信息时代的到来,网络影响范围越来越广,煤矿企业信息网络的功能也相应提升,与此同时也带来了信息网络安全问题。文章对我国煤矿企业的信息网络安全状况进行了简单介绍,并对煤矿企业信息网络安全的设计实现进行阐述。

关键词：煤矿企业信息网络安全实现方式

一种面向查询的无线传感器网络混合型数据存储算法

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科学技术与工程 2013年第12期21卷 3492-3496,3504页

作者：胡爱娜黄河科技学院物联网传感技术及其应用重点实验室郑州450006

提出了一种面向数据查询的混合型的数据存储算法,将数据存储在合适的位置。通过分析采集、存储、查询节点之间的位置关系,存储模式可在集中存储和分布存储之间相互切换。本算法引入了"热点"保护机制,可有效均衡网络能耗。实验结果表明,... 详细信息

提出了一种面向数据查询的混合型的数据存储算法,将数据存储在合适的位置。通过分析采集、存储、查询节点之间的位置关系,存储模式可在集中存储和分布存储之间相互切换。本算法引入了"热点"保护机制,可有效均衡网络能耗。实验结果表明,该算法的能耗均衡性、节点能耗、生命周期和丢包率相比于GHT(Geographic Hash Table)算法有一定的改善。

关键词：无线传感器网络数据查询混合型数据存储均衡能耗

Synthesis, Structureand Photocatalytic Properties of A 3D Zinc（Ⅱ）Triazolate Coordination Polymer

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Synthesis, Structureand Photocatalytic Properties of A 3D Zi...

Brain Functional Network Improved by Magnetic Stimulation at Acupoints during Mental Fatigue

中国化学会第七届全国结构化学学术会议

作者： ai-na Dou Li-Bo Yang Xiao-Dan Fang ai-Xin Zhu Quan-Qing Xu Faculty of Chemistry and Chemical Engineering Yunnan Normal University

＜正＞The rational design and construction of metal-organic frameworks（MOFs）have receivedconsiderable attentionfor decades because of their intriguing topologies and various potential applications such as gas adsorption and separation,catalytic activity,magnetism and sensing[1].Herein,A（3,4,5）-connected 3D zinc coordination polymer namely

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Journal of Biomedical Science and Engineering 2016年第10期9卷 65-70页

作者： Shuo Yang na ai Yanyun Qiao Lei Wang Hongli Yu Guizhi Xu Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology Tianjin China

To investigate the effects of magnetic stimulation at acupoints on brain functional network during mental fatigue, magnetic stimulation was applied to stimulate SHENMEN (HT7), HEGU (LI4) and LAOGONG (PC8) acupoint in this paper. The brain functional networks of normal state, mental fatigue state and stimulated state were constructed and the characteristic parameters were comparatively studied based on the complex network theory. The results showed that the connection of the network was enhanced by stimulating the HT7, LI4 and PC8 acupoint. In conclusion, magnetic stimulation at acupoints can effectively relieve mental fatigue.

关键词： Magnetic Stimulation Acupoint Electroencephalograph (EEG) Mental Fatigue Brain Functional Network

Resilience and response:Unveiling the impacts of extreme droughts on forests through integrated dendrochronological and remote sensing analyses

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Forest Ecosystems 2024年第4期11卷 491-501页

作者： Han Shi Xi Peng Yong-Jiao Zhou ai-Ying Wang Xue-Kai Sun na Li Quan-Sheng Bao Gude Buri Guang-You Hao CAS Key Laboratory of Forest Ecology and Silviculture Institute of Applied EcologyChinese Academy of SciencesShenyang110016China Daqinggou Ecological Research Station Institute of Applied EcologyChinese Academy of SciencesShenyang110016China University of Chinese Academy of Sciences Beijing100049China School of Life Science and Engineering Shenyang UniversityShenyang110044China Wudantala Forestry Forestry and Grassland Administration of Horqin Northeast CountyTongliao028100China

Extreme droughts are anticipated to have detrimental impacts on forest ecosystems,especially in water-limited regions,due to the influence of climate ***,considerable uncertainty remains regarding the patterns in species-specific responses to extreme ***,we conducted a study integrating dendrochronology and remote sensing methods to investigate the mosaic-distributed maple-oak(native)natural forests and poplar plantations(introduced)in the Horqin Sandy Land,Northeast *** assessed the impacts of extreme droughts on tree performances by measuring interannual variations in radial growth and vegetation *** results showed that precipitation and self-calibrated palmer drought severity index(scPDSI)are the major factors influencing tree-ring width index(RWI)and normalized difference vegetation index(NDVI).The severe droughts between 2000 and 2004 resulted in reduced RWI in the three studied tree species as well as led to NDVI reductions in both the maple-oak natural forests and the poplar *** RWI reached the nadir during the2000-2004 severe droughts and remained at low levels two years after the severe drought,creating a legacy *** contrast to the lack of significant correlation between RWI and scPDSI,NDVI exhibited a significant positive correlation with scPDSI indicating the greater sensitivity of canopy performance to droughts than radial ***,interspecific differences in RWI and NDVI responses were observed,with the fast-growing poplar species experiencing a more significant RWI decrease and more negative NDVI anomaly during severe droughts than native species,highlighting the species-specific trade-offs between drought resilience and growth *** study emphasizes the importance of combining tree-level radial growth with landscape-scale canopy remote sensing to understand forest resilience and *** study improves our understanding of forest responses to extreme drought and highlights species di

关键词： Introduced tree species native tree species NDVI Severe drought Tree-ring width

Immune suppressive protein of stress (ISPS) and psoriasis

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Acta Pharmacologica Sinica 1999年第5期 91-92页

作者： YANG Sue-Qin, SHAO Li, na ai-Hua( Department of Dermatology, airforce General Hospital, Beijing Medical University, Beijing 100036 , China)

To find out the relationship between ISPS and psoriasis, radioimmunoassay (RIA) was used to determine the effect of sera from 49 psoriatic patients and 34 healthy controls on lymphocyte proliferation of normal mouse *** lymphocyte proliferation of normal mouse lymphocytes incubated with the sera of psoriatic patients was 41.55 %, and that of controls was 68.09 %.The suppressive effect of sere in patients during the progressive stage (more extensive lesions) was stronger than that

关键词： ISPS Immune suppressive protein of stress and psoriasis