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Satellite group autonomous operation mechanism and planning algorithm for marine target surveillance

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Chinese Journal of Aeronautics 2019年第4期32卷 991-998页

作者： Chao ZHANG jinyong chen Yanbin LI Yuqing LI Weijie CHAI CETC Key Laboratory of Aerospace Information Applications The 54th Research Institute of China Electronics Technology Group Corporation Deep Space Exploration Research Center Harbin Institute of Technology

In terms of fast response problem of unanticipated marine target, it is necessary to design the satellite-ground-combined operation mechanism and planning algorithm for autonomous task planning. Firstly, based on the autonomous operation and task planning of remote sensing satellite group, it is divided into two parts: ground planning and satellite autonomous planning. Secondly,the satellite-ground-combined operation mechanism and operation flow for task planning are proposed after fully considering the resource characteristics and task demand characteristics of the ground and satellite. The satellite autonomous task planning algorithm based on extended contract net is designed. Through the simulation operation of the self-developed distributed simulation demonstration software, it shows that the operation mechanism can coordinate and cooperate effectively between the satellite autonomous task planning and ground planning. It can give full play to the advantages of the ground computing resources, reflect the control intention, make full use of the real-time feature and flexibility of the satellite calculation, and respond fast to the unanticipated task. Besides, it has solved problems of the untimely response of ground control on unanticipated observation task, the limitation of satellite computing resources and satellite-ground planning and coordination, which can effectively improve the responsiveness of remote sensing satellite to the observation task of maritime unanticipated target.

关键词： Fast response Marine target surveillance Mission planning Multi-satellite system Onboard autonomy

Genesis and Uranium Sources of Leucogranite-hosted Uranium Deposits in the Gaudeanmus Area, Central Damara Belt, Namibia: Study of Element and Nd Isotope Geochemistry

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Acta Geologica Sinica(English Edition) 2017年第6期91卷 2126-2137页

作者： FAN Honghai chen jinyong WANG Shengyun ZHAO Jingyang GU Dazhao MENG Yanning Beijing Research Institute of Uranium Geology Key Laboratory of Uranium Resource Exploration and Evaluation Technology CNNC Department of Earth Sciences and State Key Lab of Mineral Deposit Research Nanjing University

This paper presents a systematic study of major and trace elements and Sm-Nd isotopes in leucogranites closely related to uranium mineralization in the Gaudeanmus area, Namibia. The results illustrate that the uraniferous leucogranites possess high SiO2 （68.8wt%-76.0wt%, average 73.1wt%） and K （4.05wt%-7.78wt%, average 5.94wt%） contents, and are sub-alkaline and metaluminous to weakly peraluminous, as reflected by A/CNK values of 0.96-1.07 with an average of 1.01. The leucogranites are rich in light rare earth elements （LREE/HREE = 2.53-7.71; （La/Yb）s = 2.14-10.40）, have moderate Eu depletion and high Rb/Sr ratios （2.03-5.50 with an average of 4.36）; meanwhile, they are enriched in Rb, K, Th, U and Pb, and depleted in Ba, Nb, Ta, and Sr. The tNd（t） values of uraninites range from -14.8 to -16.5, and the two-stage Nd model ages are 2.43-2.56 Ga. Detailed elemental and Sm-Nd isotopic geochemical characteristics suggest that the leucogranites were formed in a post- orogenic extensional environment. The U-rich pre-Damara basement was the main source of uranium during the primary mineralization event, which is disseminated in leucogranites, whereas the uranium mineralization in veins possibly resulted from remobilization of the primary uranium minerals.

关键词： uranium source of uranium Nd isotopes leucogranites Gaudeanmus Damara Belt

Engineered M2 macrophage-derived extracellular vesicles with platelet membrane fusion for targeted therapy of atherosclerosis

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Bioactive Materials 2024年第5期35卷 447-460页

作者： Lan Xie jinyong chen Haochang Hu Yuan Zhu Xiying Wang Siyu Zhou Feifan Wang Meixiang Xiang Department of Cardiology The Second Affiliated HospitalZhejiang University School of Medicine88 Jiefang RoadHangzhou310009China State Key Laboratory of Transvascular Implantation Devices Hangzhou310009China Cardiovascular Key Laboratory of Zhejiang Province Hangzhou310009China Department of Rheumatology The Second Affiliated HospitalZhejiang University School of Medicine88 Jiefang RoadHangzhou310009China Department of Gastroenterology The Second Affiliated HospitalZhejiang University School of Medicine88 Jiefang RoadHangzhou310009China

Atherosclerosis is featured as chronic low-grade inflammation in the arteries,which leads to the formation of plaques rich in lipids.M_(2)macrophage-derived extracellular vesicles(M_(2)EV)have significant potential for anti-atherosclerotic ***,their therapeutic effectiveness has been hindered by their limited targeting capability in *** objective of this study was to create the P-M_(2)EV(platelet membrane-modified M_(2)EV)using the membrane fusion technique in order to imitate the interaction between platelets and macrophages.P-M_(2)EV exhibited excellent physicochemical properties,and microRNA(miRNA)-sequencing revealed that the extrusion process had no detrimental effects on miRNAs carried by the ***,miR-99a-5p was identified as the miRNA with the highest expression level,which targeted the mRNA of Homeobox A1(HOXA1)and effectively suppressed the formation of foam cells in *** an atherosclerotic low-density lipoprotein receptor-deficient(Ldlr􀀀^(-/-)􀀀)mouse model,the intravenous injection of P-M_(2)EV showed enhanced targeting and greater infiltration into atherosclerotic plaques compared to regular extracellular ***,P-M_(2)EV successfully suppressed the progression of atherosclerosis without causing systemic *** findings demonstrated a biomimetic platelet-mimic system that holds great promise for the treatment of atherosclerosis in clinical settings.

关键词： Atherosclerosis Extracellular vesicles M2 macrophage MiR-99a-5p Platelet-mimetic

The AaCBF4-AaBAM3.1 module enhances freezing tolerance of kiwifruit (Actinidia arguta)

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Horticulture Research 2021年第1期8卷 1301-1315页

作者： Shihang Sun Chungen Hu Xiujuan Qi jinyong chen Yunpeng Zhong Abid Muhammad Miaomiao Lin Jinbao Fang Key Laboratory for Fruit Tree Growth Development and Quality ControlZhengzhou Fruit Research InstituteChinese Academy of Agricultural SciencesZhengzhou 450009China Key Laboratory of Horticultural Plant Biology(Ministry of Education) College of Horticulture and Forestry ScienceHuazhong Agricultural UniversityWuhan 430070China

Beta-amylase(BAM)plays an important role in plant resistance to cold ***,the specific role of the BAM gene in freezing tolerance is poorly *** this study,we demonstrated that a cold-responsive gene module was involved in the freezing tolerance of *** this module,the expression of AaBAM3.1,which encodes a functional protein,was induced by cold ***3.1-overexpressing kiwifruit lines showed increased freezing tolerance,and the heterologous overexpression of AaBAM3.1 in Arabidopsis thaliana resulted in a similar *** results of promoter GUS activity and cis-element analyses predicted AaCBF4 to be an upstream transcription factor that could regulate AaBAM3.1 *** investigation of protein-DNA interactions by using yeast one-hybrid,GUS coexpression,and dual luciferase reporter assays confirmed that AaCBF4 directly regulated AaBAM3.1 *** addition,the expression of both AaBAM3.1 and AaCBF4 in kiwifruit responded positively to cold ***,we conclude that the AaCBF-AaBAM module is involved in the positive regulation of the freezing tolerance of kiwifruit.

关键词： expression freezing fir

UAV-based field watermelon detection and counting using YOLOv8s with image panorama stitching and overlap partitioning

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Artificial Intelligence in Agriculture 2024年第3期13卷 117-127页

作者： Liguo Jiang Hanhui Jiang Xudong Jing Haojie Dang Rui Li jinyong chen Yaqoob Majeed Ramesh Sahni Longsheng Fu College of Mechanical and Electronic Engineering Northwest A&F UniversityYanglingShaanxi 712100China Key Laboratory of Agricultural Internet of Things Ministry of Agriculture and Rural AffairsYanglingShaanxi 712100China Zhengzhou Fruit Research Institute Chinese Academy of Agricultural SciencesZhengzhouHenan 450009China Department of Biological&Agricultural Engineering Texas A&M UniversityDallasTX 75252United States Agricultural Mechanization Division ICAR-Central Institute of Agricultural EngineeringBhopal 462038Madhya PradeshIndia

Accurate watermelon yield estimation is crucial to the agricultural value chain,as it guides the allocation of agricultural resources as well as facilitates inventory and logistics *** conventional method of watermelon yield estimation relies heavily onmanual labor,which is both time-consuming and *** address this,this work proposes an algorithmic pipeline that utilizes unmanned aerial vehicle(UAV)videos for detection and counting of *** pipeline uses You Only Look Once version 8 s(YOLOv8s)with panorama stitching and overlap partitioning,which facilitates the overall number estimation ofwatermelons in *** watermelon detection model,based on YOLOv8s and obtained using transfer learning,achieved a detection accuracy of 99.20%,demonstrating its potential for application in yield *** panorama stitching and overlap partitioning based detection and counting method uses panoramic images as input and effectively mitigates the duplications comparedwith the video tracking based detection and *** counting accuracy reached over 96.61%,proving a promising application for yield *** high accuracy demonstrates the feasibility of applying this method for overall yield estimation in large watermelon fields.

关键词： Watermelon yield estimation Unmanned aerial vehicle Object detection Panorama stitching Overlap partitioning

C-H-O Stable Isotope, Elements and Fluid Geochemistry of Uraniferous Leucogranites in Gaudeanmus Area, Southern Central Zone, Damara Orogen, Namibia

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Journal of Geoscience and Environment Protection 2017年第2期5卷 1-18页

作者： jinyong chen Honghai Fan Shengyun Wang Dazhao Gu Beijing Research Institute of Uranium Geology Beijing China Key Laboratory of Uranium Resource Exploration and Evaluation Technology CNNC Beijing China

This paper focuses on the effect of the later hydrotherm on uraniferous leucogranites and the stages of uranium mineralization. Here, we review C-H-O stable isotope, elements and fluid geochemistry of uraniferous leucogranites in Gaudeanmus, Namibia. The results show that there is significant increasing amount of rare earth element from non-mineralized to uraniferous leucogra-nites, indicating the synchronization of REE enrichment and uranium mineralization. Uranium enrichment may have close relations with Pb, Th, Co, Ni, REE in this region, so REE and U evidently exist homology. There are at least two stages of uranium mineralization by later hydrothermal alteration: firstly, due to magnatic residual high temperature and low salinity fluid, the temperature of main metallogenetic epoch ranges from 470°C to 530°C, salinity ranges from 3.55% to 9.60% NaCleq, and C, H, O stable isotope is -23‰ - -13.6‰, -53.3‰ - -46.4‰, 7.71‰ - 8.81‰, respectively. Secondly, due to superim-posed hydrothermal fluid, the temperature, salinity, and C, H, O stable isotope is 150°C - 220°C, 4.65% - 19.05% NaCleq, -20.3‰ -?-3.7‰, -64.7‰ - -53.6‰, 1.49‰ - 1.99‰, respectively. The fluid for reformation is derived from postmagmatic fluid, mixed with a number of meteoric water.

关键词： Geochemistry C-H-O Stable Isotope Uranium Mineralization Leucogranites Gaudeanmus Damara Belt

Metric-based Few-shot Classification in Remote Sensing Image

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Artificial Intelligence Advances 2022年第1期4卷 1-8页

作者： Mengyue Zhang jinyong chen Gang Wang Min Wang Kang Sun The 54th Research Institute of China Electronics Technology Group Corporation ShijiazhuangHebei050081China CETC Key Laboratory of Aerospace Information Applications Shijiazhuang050081HebeiChina

Target recognition based on deep learning relies on a large quantity of samples,but in some specific remote sensing scenes,the samples are very ***,few-shot learning can obtain high-performance target classification models using only a few samples,but most researches are based on the natural ***,this paper proposes a metric-based few-shot classification technology in remote ***,we constructed a dataset(RSD-FSC)for few-shot classification in remote sensing,which contained 21 classes typical target sample slices of remote sensing ***,based on metric learning,a k-nearest neighbor classification network is proposed,to find multiple training samples similar to the testing target,and then the similarity between the testing target and multiple similar samples is calculated to classify the testing ***,the 5-way 1-shot,5-way 5-shot and 5-way 10-shot experiments are conducted to improve the generalization of the model on few-shot classification *** experimental results show that for the newly emerged classes few-shot samples,when the number of training samples is 1,5 and 10,the average accuracy of target recognition can reach 59.134%,82.553%and 87.796%,*** demonstrates that our proposed method can resolve few-shot classification in remote sensing image and perform better than other few-shot classification methods.

关键词： Few-shot Metric learning Remote sensing Target recognition Episodic training

Metallogenic mechanism of leucogranite-type uranium deposit in the Gaudeanmus area,Namibia

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Metallogenic mechanism of leucogranite-type uranium deposit ...

A novel mouse model of calcific aortic valve stenosis

第三届全国青年地质大会

作者： jinyong chen Honghai Fan Shengyun Wang Dazhao Guo Beijing Research Institute of Uranium Geology Key Laboratory of Uranium Resource Exploration and Evaluation Technology CNNC

1 Introduction As an important type of uranium deposit associated with plutonic rocks,the leucogranite-hosted deposit has become a significant research objective for uranium ore *** draws great attention from the industry not only due to the significance of the deposit type,the variety of compositional minerals,and great potential on mineral

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Animal Models and Experimental Medicine 2024年第4期7卷 523-532页

作者： Ningjing Qian Yaping Wang Wangxing Hu Naifang Cao Yi Qian jinyong chen Juan Fang Dilin Xu Haochang Hu Shuangshuang Yang Dao Zhou Hanyi Dai Dongdong Wei Jian'an Wang Xianbao Liu Department of Cardiology The Second Affiliated HospitalZhejiang University School of MedicineHangzhouChina State Key Laboratory of Transvascular Implantation Devices China Cardiovascular Key Laboratory of Zhejiang Province HangzhouChina Department of Cardiovascular Surgery The Second Affiliated HospitalZhejiang University School of MedicineHangzhouChina Department of Endocrinology The Second Affiliated HospitalZhejiang University School of MedicineHangzhouChina Binjiang Institute of Zhejiang University HangzhouChina

Background:Calcific aortic valve stenosis(CAVS)is one of the most challenging heart diseases in clinical with rapidly increasing ***,study of the mecha-nism and treatment of CAVS is hampered by the lack of suitable,robust and efficient models that develop hemodynamically significant stenosis and typical calcium ***,we aim to establish a mouse model to mimic the development and features of ***:The model was established via aortic valve wire injury(AVWI)combined with vitamin D subcutaneous injected in wild type C57/BL6 *** transthoracic echocardiography was applied to evaluate aortic jet peak velocity and mean *** specimens were collected and examined in respect of valve thickening,calcium deposition,collagen accumulation,osteogenic differentiation and ***:Serial transthoracic echocardiography revealed that aortic jet peak velocity and mean gradient increased from 7 days post model establishment in a time depend-ent manner and tended to be stable at 28 *** with the sham group,sim-ple AVWI or the vitamin D group,the hybrid model group showed typical pathological features of CAVS,including hemodynamic alterations,increased aortic valve thicken-ing,calcium deposition,collagen accumulation at 28 *** addition,osteogenic dif-ferentiation,fibrosis and inflammation,which play critical roles in the development of CAVS,were observed in the hybrid ***:We established a novel mouse model of CAVS that could be induced efficiently,robustly and economically,and without genetic *** provides a fast track to explore the underlying mechanisms of CAVS and to identify more effec-tive pharmacological targets.

关键词： animal model calcific aortic valve stenosis valve calcification