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Robust adaptive UKF based on SVR for inertial based integrated navigation

Defence Technology（防务技术） 2020年第4期16卷 846-855页

作者： Meng-de Zhang Hai-fa Dai Bai-qing Hu Qi Chen College of Electrical Engineering Naval Univ.of EngineeringWuhan 430033China qingdao brigade Shandong Branch of the Armed Police Marine Police CorpsQingdao 266033China

Aiming at the problem that the traditional Unscented Kalman Filtering(UKF) algorithm can't solve the problem that the measurement covariance matrix is unknown and the measured value contains outliers,this paper proposes a robust adaptive UKF algorithm based on Support Vector Regression(SVR).The algorithm combines the advantages of support vector regression with small samples,nonlinear learning ability and online estimation capability of adaptive algorithm based on ***,the SVR model is trained by using the innovation in the sliding window,and the new innovation is *** the deviation between the estimated innovation and the measured innovation exceeds a given threshold,then measured innovation will be replaced by the predicted innovation,and then the processed innovation is used to calculate the measurement noise covariance matrix using the adaptive estimation *** experiments and measured data experiments show that SVRUKF is significantly better than the traditional UKF,robust UKF and adaptive UKF algorithms for the case where the covariance matrix is unknown and the measured values have outliers.

关键词： Integrated navigation Support vector regression Unscented Kalman filter Robust filter Adaptive filter

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Astronomical Cycles of the Late Permian Lopingian in South China and Their Implications for Third-Order Sea-Level Change

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Journal of Ocean University of China 2020年第6期19卷 1331-1344页

作者： WANG Xiuqi ZHANG Xunhua GAO Fei ZHANG Minghua College of Marine Geosciences Ocean University of ChinaQingdao 266100China qingdao Institute of Marine Geology China Geological SurveyQingdao 266071China qingdao Jimo Municipal Transport Bureau Qingdao 266200China The brigade of Geological Survey of Ganxi Bureau of Geologic Exploration and Mineral Development of Jiangxi ProvinceNanchang 330002China

The late Permian(Lopingian)was a crucial climate transition period from the late Paleozoic Ice Age to the early Triassic of exceptionally high ***,the origins of the third-order sea-level changes during the Lopingian Epoch remain ***,we presented astronomically calibrated gamma-ray(GR)log and non-U GR(computed gamma ray or CGR)curves from the clastic and carbonate successions of well GFD-1 in the Pingle Depression of South China for studying the sea-level oscillations during the *** analyses of the 405 kyr-calibrated GR and CGR time data revealed periodicities close to about 405,about 100,about 44.2,about 35.1,about 21,and about 17.5 kyr,supporting the existence of Milankovitch forcing in the sedimentary records.A high-resolution astronomical time scale and high-resolution sedimentation rate curve of the Lopingian from well GFD-1 were constructed by cyclostratigraphic *** eccentricity and obliquity amplitude modulation cycles suggested long periodicities of about 2.4 and about 1.2 myr,*** the Wuchiapingian greenhouse of the Lopingian,the about 2.4 myr eccentricity oscillation controlled‘weak’glacio-eustasy and/or aquifer eustatic changes related to the global third-order sea-level changes and that a lowstand(W2)was initiated by an eccentricity oscillation *** contrast,during the Changhsingian,which exhibited a cooling event,an about 1.2 myr obliquity cycle was probably strong,with the sea-level records highlighting the link between the‘icehouse’sea-level lowering(C2 and C1)and the obliquity ***,dynamic sedimentary noise model as an indicator of sea-level showed local third-order sea-level variations,the coevolution trends in the orbital power,global and local sea-level changes,and sedimentation rate had significant implications for establishing the global nature and synchronicity of these million-year-scale eustatic records and reconstructing the temporal depositional history at a region

关键词： Lopingian Milankovitch cycle third-order eustasy long-period astronomical cycle sedimentation rate

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Analysis of moisture distribution within composite materials in hygrothermal environment

Analysis of moisture distribution within composite materials...

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第八届中国功能材料及其应用学术会议

作者： JIN Ping WANG De TAN Xiao-ming qingdao Branch of Naval Aeronautical Engineering Institute Graduate Students brigade of Naval Aeronautical Engineering Institute

ISBN: (纸本)9783037859698

The moisture absorption behavior of CCF300/BA9916 composites in 70℃ distilled water *** on the moisture absorption experiments,the moisture diffusivity and solubility were gained for FEM *** experiments results show that the moisture absorption behavior of CCF300/BA9916 composites basically conforms the Fickian’s second *** simulation results were coincided with the experimental data,the long-term absorption behavior and moisture distribution concentrations within the specimen were obtained.

关键词： Composites Moisture environment Distribution concentration

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Study on Seawater Intrusion in Kiaochow Bay Region

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Meteorological and Environmental Research 2013年第1期4卷 39-40页

作者： Xin Guo Jianwei Zhang Ying Xu Hao Xu Guangfa Ding Zijian Wang Xueying Ma College of Chemistry and Environment Qingdao University qingdao Administration Bureau of Geology and Mineral Resources The Second Hydrologic Engineering Geology brigade of Xinjiang Geology and Mineral Resources Bureau

General situation of the seawater intrusion in Kiaochow Bay region was analyzed. Current status of the seawater intrusion and its formation mechanism, influence factor and hazard in Kiaochow Bay region were summarized. Finally, against seawater intrusion situation in the region, a series of practical prevention and control countermeasures were proposed.

关键词： Kiaochow Bay region Seawater intrusion Control countermeasure China

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Serpentinization of peridotites from the southern Mariana forearc

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Progress in Natural Science:Materials International 2009年第10期19卷 1287-1295页

作者： Xiaomei Wang a,b,Zhigang Zenga,Junbing Chenc a Key Laboratory of Marine Geology and Environment,Institute of Oceanology,Chinese Academy of Sciences,7 Nanhai Road,qingdao 266071,China b Graduate School of Chinese Academy of Sciences,19 Yuquan Road,Beijing 100049,China c Geological brigade of Hydrogeology and Engineering Geology,Zhejiang Geological Prospecting Bureau,206 Baoshan Road,Ningbo 315012,China Key Laboratory of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences 7 Nanhai Road Qingdao 266071 China Graduate School of Chinese Academy of Sciences 19 Yuquan Road Beijing 100049 China Geological brigade of Hydrogeology and Engineering Geology Zhejiang Geological Prospecting Bureau 206 Baoshan Road Ningbo 315012 China

A detailed petrologic and mineralogic study was carried out on serpentinized peridotites dredged from the southern landward slopes of the Mariana Trench,in order to reveal the serpentinization process of these unusual rocks and to identify the sole presence of the mineral *** constituent minerals of these southern Mariana forearc peridotites are olivine,amphibole and spinel,as well as serpentine,chlorite and *** with serpentinite seamounts,the serpentinized peridotites from the southern Mariana forearc are characterized by the absence of magnetite and brucite,and the common presence of talc;besides,the serpentine mineral variety is simplex,only *** mineral chemistry and mineral phase relationships,we conclude that(1) the absence of magnetite in the serpentinized peridotites is due to incomplete serpentinization,other than magnetite,the iron end-member in olivine forms Ferich brucite and Fe-rich serpentine;(2) brucite is not stable with high silica activity,reacting with later SiO2-rich fluid and then forming lizardite,leading to a lack of brucite in these serpentinized peridotites;(3) the occurrence of talc is the result of later SiO2-rich fluid reactions with lizardite;and(4) the reason for the sole occurrence of lizardite is that the temperature condition of our study are awas nothig henough for the formation of antigorite(whichisstable at >500 °C).Despite the broad overlap of lizardite and chrysotile in growth temperature,differences in the modes of occurrence of lizardite and chrysotile,such as the scarcity of H2O,low porosity and permeability,as well as the actual situation of initial serpentinization in the study area,result in the absolute prevalence of lizardite over chrysotile in the area.

关键词： Peridotite Serpentinization Mineral chemistry Lizardite Mariana

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