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Deep learning classification of coastal wetland hyperspectral image combined spectra and texture features: A case study of huanghe(Yellow) River Estuary wetland

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Acta Oceanologica Sinica 2019年第5期38卷 142-150页

作者： yabin hu Jie Zhang Yi Ma Xiaomin Li Qinpei Sun Jubai An Information Science and Technology College Dalian Maritime University First Institute of Oceanography Ministry of Natural Resources College of Surveying Science and Engineering Shandong University of Science and Technology

This paper develops a deep learning classification method with fully-connected 8-layers characteristics to classification of coastal wetland based on CHRIS hyperspectral image. The method combined spectral feature and multi-spatial texture feature information has been applied in the huanghe(Yellow) River Estuary coastal *** results show that:(1) Based on testing samples, the DCNN model combined spectral feature and texture feature after K-L transformation appear high classification accuracy, which is up to 99%.(2) The accuracy by using spectral feature with all the texture feature is lower than that using spectral only and combing spectral and texture feature after K-L transformation. The DCNN classification accuracy using spectral feature and texture feature after K-L transformation was up to 99.38%, and the outperformed that of all the texture feature by 4.15%.(3) The classification accuracy of the DCNN method achieves better performance than other methods based on the whole validation image, with an overall accuracy of 84.64% and the Kappa coefficient of 0.80.(4) The developed DCNN model classification algorithm ensured the accuracy of all types is more balanced, and it also greatly improved the accuracy of tidal flat and farmland, while kept the classification accuracy of main types almost invariant compared to the shallow algorithms. The classification accuracy of tidal flat and farmland is up to 79.26% and 56.72%respectively based on the DCNN model. And it improves by about 2.51% and 10.6% compared with that of the other shallow classification methods.

关键词： coastal wetland hyperspectral image deep learning classification

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Coastal wetland hyperspectral classification under the collaborative of subspace partition and infinite probabilistic latent graph ranking

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Science China(Technological Sciences) 2022年第4期65卷 759-777页

作者： hu yabin REN GuangBo MA Yi YANG JunFang WANG JianBu AN JuBai LIANG Jian MA YuanQing SONG XiuKai First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China Technology Innovation Center for Ocean Telemetry Ministry of Natural ResourcesQingdao 266061China College of Oceanography and Space Informatics China University of PetroleumQingdao 266580China Information Science and Technology College Dalian Maritime UniversityDalian 116026China Nantong Academy of Intelligent Sensing Nantong 226001China Shandong Marine Resources and Environment Research Institute Yantai 264006China

The abundance of spectral information provided by hyperspectral imagery offers great benefits for many ***,processing such high-dimensional data volumes is a challenge because there may be redundant bands owing to the high interband *** study aimed to reduce the possibility of“dimension disaster”in the classification of coastal wetlands using hyperspectral images with limited training *** study developed a hyperspectral classification algorithm for coastal wetlands using a combination of subspace partitioning and infinite probabilistic latent graph ranking in a random patch network(the SSP-IPLGR-RPnet model).The SSP-IPLGR-RPnet approach applied SSP techniques and an IPLGR algorithm to reduce the dimensions of hyperspectral *** RPnet model overcame the problem of dimension disaster caused by the mismatch between the dimensionality of hyperspectral bands and the small number of training *** results showed that the proposed algorithm had a better classification performance and was more robust with limited training data compared with that of several other state-of-the-art *** overall accuracy was nearly 4%higher on average compared with that of multi-kernel SVM and RF *** with the EMAP algorithm,MSTV algorithm,ERF algorithm,ERW algorithm,RMKL algorithm and 3D-CNN algorithm,the SSP-IPLGR-RPnet algorithm provided a better classification performance in a shorter time.

关键词： coastal wetland hyperspectral image dimensionality reduction classification limited training data

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Multi user computation offloading decision in edge networks

Multi user computation offloading decision in edge networks

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第43届中国控制会议

作者： Chang Liu Yan Yuan Weihua Cao yabin hu School of Automation China University of Geosciences Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education

Computing offload is a key technology in mobile edge computing(MEC).By offloading tasks to the edge servers,it solves the problem that terminal devices in the edge network cannot handle high computing and time sensitive ***,in multi-user scenarios,the resources of edge servers are very limited,and without good offloading decisions,the performance of MEC systems cannot be *** this paper,the computation offloading problem of multi-user MEC system is analyzed and modeled and a batch offloading method is *** in response to the shortcomings of the existing algorithms,a neural network combined with genetic algorithm for offloading decision is *** results show that the proposed algorithm performs better than existing algorithms in terms of time complexity and accuracy.

关键词： edge network computation offloading offloading decision neural network

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弹簧夹头的改进

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轴承 2000年第1期 31-33页

作者：胡晓杰胡亚滨哈尔滨轴承总厂黑龙江哈尔滨150036 哈尔滨轻工化学总厂黑龙江哈尔滨150001

弹簧夹头是轴承套圈车加工广泛应用的夹卡装置,弹簧夹头的精度高低和寿命长短,直接影响轴承套圈的加工精度和生产效率.将整体式弹簧夹头改进为镶块式弹簧夹头,并采用相应的加工工艺来保证镶块式弹簧夹头的精度和耐用度,不仅可保证轴承... 详细信息

弹簧夹头是轴承套圈车加工广泛应用的夹卡装置,弹簧夹头的精度高低和寿命长短,直接影响轴承套圈的加工精度和生产效率.将整体式弹簧夹头改进为镶块式弹簧夹头,并采用相应的加工工艺来保证镶块式弹簧夹头的精度和耐用度,不仅可保证轴承套圈的加工精度,而且可节省大量弹簧钢材料、降低弹簧夹头的制造成本.经济效益十分可观.

关键词：轴承轴承套圈弹簧夹头夹头体镶块式

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Isolation and characterization of spike S2-specific monoclonal antibodies with reactivity to pan-coronaviruses

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Virologica Sinica 2024年第1期39卷 169-172页

作者： yabin hu Jun Chen Jing Yang Zhanpeng Liu Xiaoyue Zhang Qian Wu Lulu Liu Shishan Teng Rongzhang He Bo Liu Xingyu Zheng Rui Lu Dong Pan You Wang Liting Peng Hongying chen Yi-Ping Li Wenpei Liu Xiaowang Qu College of Basic Medical Sciences Hengyang Medical SchoolUniversity of South China&MOE Key Lab of Rare Pediatric DiseasesHengyang421001China Translational Medicine Institute The First People's Hospital of ChenzhouHengyang Medical SchoolUniversity of South ChinaChenzhou423000China College of Life Sciences Northwest A&F UniversityYangling712100China Institute of human Virology Department of Pathogen Biology and Biosecurityand Key Laboratory of Tropical Disease Control of Ministry of EducationZhongshan School of MedicineSun Yat-sen UniversityGuangzhou510080China School of Public Health University of South ChinaHengyang421001China

Dear Editor,Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),theseventh coronavirus known to jump from intermediate hosts to humans,has resulted in a worldwide pandemic and caused immense economicdamage(Tan et al.,2020;Zhu et al.,2020).It is believed that coronavirus spillover may occur again in the *** exposure to a bat coro-navirus has been serologically confimed in a rural area of China,indi-cating that the coronavirus spillover occurred,although the origin andfrequency of spillovers are unclear(Wang et al.,2018).

关键词： monoclonal acute

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SARS-CoV-2 spike-specific TFH cells exhibit unique responses in infected and vaccinated individuals

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Signal Transduction and Targeted Therapy 2023年第11期8卷 5338-5352页

作者： Rongzhang He Xingyu Zheng Jian Zhang Bo Liu Qijie Wang Qian Wu Ziyan Liur Fangfang Chang yabin hu Ting Xie Yongchen Liu Jun Chen Jing Yang Shishan Teng Rui Lu Dong Pan You Wang Liting Peng Weijin huang Velislava Terzieva Wenpei Liu Youchun Wang Yi-Ping Li Xiaowang Qu College of Basic Medical Sciences Hengyang Medical SchoolUniversity of South China&MOE Key Lab of Rare Pediatric Diseases421001 HengyangChina Translational Medicine Institute The First People's Hospital of ChenzhouHengyang Medical SchoolUniversity of South China423000 ChenzhouChina The Central Hospital of Shaoyang 422000 ShaoyangChina Institute of human Virology Zhongshan School of Medicineand Key Laboratory of Tropical Disease Control of Ministry of EducationSun Yat-sen University501180 GuangzhouChina School of Public Health University of South China421001 HengyangChina National Institutes for Food and Drug Control Key Laboratory of the Ministry of Health for Research on Quality and Standardization of Biotech ProductsKey Laboratory of Biological Product Quality Research and Evaluation of National Medical Products Administration102629 BejingChina Laboratory of OMICs Technologies Institute of Biology and Immunology of Reproduction"Acad.Kiril Bratanov"BulgarianAcademyof SciencesSofia 1113Bulgaria

Long-term humoral immunity to SARS-CoV-2 is essential for preventing reinfection. The production of neutralizing antibody (nAb)and B cell differentiation are tightly regulated by T follicular help (T_(FH)) cells. However, the longevity and functional role of T_(FH) cellsubsets in COVID-19 convalescents and vaccine recipients remain poorly defined. Here, we show that SARS-CoV-2 infection andinactivated vaccine elicited both spike-specific CXCR3^(+) T_(FH) cell and CXCR3^(-) T_(FH) cell responses, which showed distinct responsepatterns. Spike- specific CXCR3^(+) T_(FH) cells exhibit a dominant and more durable response than CXCR3^(-) T_(FH) cells that positivelycorrelated with antibody responses. A third booster dose preferentially expands the spike-specific CXCR3^(+) T_(FH) cell subset inducedby two doses of inactivated vaccine, contributing to antibody maturation and potency. Functionally, spike-specific CXCR3^(+) T_(FH) cellshave a greater ability to induce spike-specific antibody secreting cells (ASCs) differentiation compared to spike-specific CXCR3^(-) T_(FH)cells. In conclusion, the persistent and functional role of spike-specific CXCR3^(+) T_(FH) cells following SARS-CoV-2 infection andvaccination may play an important role in antibody maintenance and recall response, thereby conferring long-term protection. Thefindings from this study will inform the development of SARS-CoV-2 vaccines aiming to induce long-term protective immunememory.

关键词： vaccine doses protective

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Identification of broad neutralizing antibodies against Omicron subvariants from COVID-19 convalescents and vaccine recipients

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Virologica Sinica 2023年第2期38卷 313-316页

作者： Jun Chen Jing Yang Fangfang Chang yabin hu Qian Wu Shishan Teng Yongchen Liu Jian Zhang Rongzhang He Bo Liu Xingyu Zheng Ze Liu Yanxi Peng Zhenhua Xie Yuanfang Zhang Rui Lu Dong Pan You Wang Liting Peng Wenpei Liu Yi-Ping Li Xiaowang Qu School of Public Health Southern Medical UniversityGuangzhou510515China School of Laboratory Medicine and Biotechnology Southern Medical UniversityGuangzhou510515China Translational Medicine Institute The First People's Hospital of ChenzhouHengyang Medical SchoolUniversity of South ChinaChenzhou423000China Institute of human Virology Department of Pathogen Biology and Biosecurityand Key Laboratory of Tropical Disease Control of Ministry of EducationZhongshan School of MedicineSun Yat-sen UniversityGuangzhou510080China School of Nursing Xiangnan UniversityChenzhou423000China College of Basic Medicine Xiangnan UniversityChenzhou423000China College of Pharmacy Xiangnan UniversityChenzhou423000China School of Public Health Hengyang Medical SchoolUniversity of South ChinaHengyang421001China Department of Infectious Diseases The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhou510630China

Dear Editor,Omicron(B.1.1.529)was designated a variant of concern(VOC)on November 26,2021(Callaway,2021),and its subvariants BA.1,BA.2,and BA.3 emerged and circulated almost simultaneously(Desingu et al.,2022).BA.2 was more efficient in transmission and quickly overtook BA.1 to become the variant most frequently detected worldwide(Yamasoba et al.,2022a).Compared to the prototype SARS-CoV-2 spike protein(S),the BA.1 and BA.2 spike proteins harbor more than 30 mutations,of which 21 are identical between the two subvariants,while the BA.3 spike differs from BA.1 and BA.2 by 3 mutations in the receptor binding domain(RBD)(Fig.1A).More recently,BA.4 and BA.5(hereafter BA.4/5)emerged,sharing the same spike sequence and containing four additional mutations,Del69–70,L452R,F486V,and R493Q,compared with ***.4/5 were detected first in South Africa and evolved independently of BA.2;they have spread widely and replaced BA.2 as the predominant VOC(Gruell et al.,2022b;Tegally et al.,2022).In addition,BA.2.75,derived from the BA.2 subvariant,harbors nine additional mutations in the spike protein compared with BA.2(Fig.1A).BA.4/5 and BA.2.75 have led to the continuous emergence of novel Omicron subvariants,including BF.7 and *** new subvariants may be driving waves of pandemics.

关键词： harbor neutral hereafter

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航行船舶交会测量精度分析

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激光与光电子学进展 2016年第8期53卷 155-160页

作者：黄士亮胡亚斌周钧中国人民解放军92941部队中国科学院西安光学精密机械研究所中国科学院大学

基于交会测量原理,建立了测量航行船舶位置、尺寸的数学模型,推导了测量误差公式。利用Matlab软件进行测量误差分布模拟仿真,对系统测量精度的主要因素进行了分析;结合实验,对测量模型进行了验证。结果表明,利用交会测量原理进行航行船... 详细信息

基于交会测量原理,建立了测量航行船舶位置、尺寸的数学模型,推导了测量误差公式。利用Matlab软件进行测量误差分布模拟仿真,对系统测量精度的主要因素进行了分析;结合实验,对测量模型进行了验证。结果表明,利用交会测量原理进行航行船舶位置、尺寸测量的方法是可行的,为进一步的工程应用奠定了基础。

关键词：测量交会测量航行船舶精度分析

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双入口CT灌注评价肺腺癌和肺鳞癌血供特征

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中国医学影像技术 2017年第3期33卷 419-422页

作者：高垒杨青胡亚彬张亮任佳男青岛大学附属医院放射科山东青岛266071

目的探讨双入口CT灌注成像技术分析肺腺癌和肺鳞癌血供特征的价值。方法对40例原发性肺癌患者行胸部容积CT灌注扫描,进行双入口灌注图像后处理分析,由2名高年资医师单独测量记录肺部癌性肿块的支气管动脉灌注血流量(BF)、肺动脉灌注血流... 详细信息

目的探讨双入口CT灌注成像技术分析肺腺癌和肺鳞癌血供特征的价值。方法对40例原发性肺癌患者行胸部容积CT灌注扫描,进行双入口灌注图像后处理分析,由2名高年资医师单独测量记录肺部癌性肿块的支气管动脉灌注血流量(BF)、肺动脉灌注血流量(PF)、肺动脉灌注指数[PI;PI=PF/(PF+BF)]及肿块体积、位置。比较肺腺癌与肺鳞癌、中央型肺癌和周围型肺癌各灌注参数值之间的差异。分析肿瘤体积与各CT灌注参数值之间的相关性。采用组内相关系数(ICC)分析观察者间一致性。结果 40例肺癌患者的PF为(54.26±21.07)ml/(min·100ml),BF为(64.41±22.06)ml/(min·100ml),PI为(43.38±16.07)%。其中肺腺癌23例、肺鳞癌17例,腺癌的PI小于鳞癌(t=-2.196,P=0.034)。周围型肺癌17例,中央型23例。周围型肺癌的PI高于中央型肺癌(t=2.305,P=0.027)。肺腺癌与肺鳞癌、中央型肺癌和周围型肺癌之间PF与BF的差异均无统计学意义(P均>0.05)。肿瘤体积与肺癌的PI呈负相关(r=-0.39,P=0.01)。2名医师测量病灶的PF、BF、PI的一致性良好,ICC分别为0.97、0.93、0.91。结论双入口CT灌注技术可用于评价不同组织类型和位置肺癌的血供特征,肺癌的PI与肿瘤的大小及位置有关。

关键词：肺肿瘤体层摄影术,X线计算机灌注成像

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滤泡调节性T细胞在病毒感染与疫苗免疫中的作用及机制研究进展

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中华实验和临床病毒学杂志 2021年第1期35卷 116-120页

作者：刘紫嫣张健胡雅彬刘文培南华大学附属郴州医院郴州423000 南华大学转化医学研究所郴州423000

滤泡调节性T细胞(T follicular regulatory cell,Tfr)是近年来发现的一类CD4^(+)T细胞亚群,其来源于调节性T细胞(T regulatory cell,Treg),兼具Treg细胞及滤泡辅助性T细胞(T follicular helper cell,Tfh)相似的生物学特征。Tfr细胞在次级淋巴器官生发中心(germinal center,GC)调控Tfh细胞和B细胞的分化,辅助筛选高亲和力抗体,并防止自身抗体产生,确保免疫平衡。本文通过综述Tfr细胞的生物学特征和功能,总结Tfr细胞在病毒感染及疫苗免疫后抗体应答中的作用,旨在深刻理解病毒感染后抗体产生和成熟的免疫调节机制,为病毒疫苗的设计与免疫策略制定提供参考。

关键词：病毒滤泡调节性T细胞滤泡辅助性T细胞中和抗体疫苗

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