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A fully automatic registration approach based on contour and SIFT for HJ-1 images

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Science China Earth Sciences 2012年第10期55卷 1679-1687页

作者： NI Xiliang CAO ChunXiang DING lin jiang Tao zhang Hao JIA HuiCong li guangHe ZHAO Jian CHEN Wei JI Wei XU min GAO MengXu ZHENG Sheng tian Rong liU cheng li Sha State Key Laboratory of Remote Sensing Science Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University Institute of Remote Sensing Applications Chinese Academy of Sciences Beijing 100101 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Institute of Remote Sensing Applications Chinese Academy of Sciences Beijing 100101 China Shandong University of Science and Technology Qingdao 266510 China 5 Beijing University of Technology Beijing 100124 China Beijing University of Technology Bering 100124 China

To achieve a fully automatic registration between HJ-1 CCD images and HJ-1 infrared images is a difficult task as it must deal with the varying illuminations and resolutions of the images,different perspectives,and the local deformations within the *** this paper,aimed at those registration issues,a fully automatic registration approach based on contour and SIFT is *** registration technique performs a pre-registration process using contour feature matching algorithm that decides the overlapping region between a reference image and an input *** the coarse regions are obtained,it performs a fine registration process based on SIFT detector and a local adaptive matching *** the fine registration process,image blocking theory is used,which not only speeds up the features extraction and matching,but also makes the matching point pairs distributed uniformly in images,and further improves the accuracy of input image *** with visible images and infrared images from HJ-1A/B demonstrate the efficiency and the accuracy of the proposed technique for multisource remote sensing images registration.

关键词： automatic registration contour SIFT coarse matching fine registration local adaptive strategy

Comparison of Functional and Radiological Outcomes Between Two Posterior Approaches in the Treatment of Multilevel Cervical Spondylotic Myelopathy

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Chinese Medical Journal 2015年第15期128卷 2054-2058页

作者： Da-jiang Ren Fang li Zhi-cheng zhang guan Kai Jian-lin Shan guang-min Zhao tian-Sheng Sun Department of Orthopedic Surgery Beijing Army General Hospital Beijing 100700 China

Background：Posterior cervical decompression is an accepted treatment for multilevel cervical spondylotic myelopathy （CSM）.Each posterior technique has its own advantages and *** the present study,we compared the functional and radiological outcomes of expansive hemilaminectomy and laminoplasty with mini titanium plate in the treatment of multilevel ***：Forty-four patients with multilevel CSM treated with posterior cervical surgery in Department of Orthopedic Surgery,Beijing Army General Hospital from March 2011 to June 2012 were enrolled in this retrospective *** were divided into two groups by surgical procedure：Laminoplasty （Group L） and hemilaminectomy （Group H）.Perioperative parameters including age,sex,duration of symptoms,opcrative duration,and intraoperative blood loss were recorded and *** canal area,calculated using AutoCAD software（Autodesk Inc.,San Rafael,CA,USA）,and neurological improvement,evaluated with Japanese Orthopedic Association score,were also ***：Neurological improvement did not differ significantly between *** H had a significantly shorter operative duration and significantly less blood *** expansion ratio was significantly greater in Group L （77.83 ± 6.41%） than in Group H （62.72 ± 3.86%）（P 〈 0.01）.Conclusions：both surgical approaches are safe and effective in treating multilevel *** provides a greater degree of enlargement of the spinal canal,whereas expansive hemilaminectomy has the advantages of shorter operative duration and less intraoperative blood loss.

关键词： Expansive Hemilaminectomy Laminoplasty Multilevel Cervical Spondylotic Myelopathy Posterior Cervical Decompression

Long-Term Outcome of Dynesys Dynamic Stabilization for Lumbar Spinal Stenosis

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Chinese Medical Journal 2018年第21期131卷 2537-2543页

作者： Yang zhang Zhi-cheng zhang Fang li tian-Sheng Sun Jian-lin Shan Kai guan guang-min Zhao li-Zhi zhang Medical School of Chinese People's liberation Army Beijing 100853 China Department of Orthopedics Army General Hospital of Chinese People's Liberation Army Beijing 100700 China

Background： Many clinical studies over the past decade have indicated positive outcomes for patients treated with Dynesys dynamic stabilization for lumbar degenerative disease. However, long-term outcomes of Dynesys for lumbar spinal stenosis are rarely reported. The aim of this study was to analyze the long-term clinical and radiologic outcomes for patients with lumbar spinal stenosis treated with Dynesys stabilization. Methods： Thirty-eight patients with lumbar spinal stenosis were treated with Dynesys stabilization from July 2008 to March 2010. The minimal duration of follow-up was 72 months. The patients were divided into stenosis and spondylolisthesis groups according to degenerative spondylolisthesis. Clinical outcomes were evaluated using the Oswestry Disability Index （ODI） and visual analog scale （VAS）. Radiographic evaluations included range of motion （ROM） and the disc heights of stabilized segments and the upper adjacent segments. We also evaluated the occurrence of radiographic and symptomatic adjacent segment degeneration （ASD）. Results： There were 23 patients in stenosis group and 15 patients in spondylolisthesis group. The ODl scores were significantly improved at the final follow-up evaluation, as compared to the baseline values （ 16.1± 5.7 vs. 57.2 ± 14.2, t = 61.4 l, P 〈 0.01 ）. The VA S scores for back and leg pain were significantly improved from 4.82 ±0.89 and 4.04 ± 0.82 preoperatively to 0.93± 0.61 and 0.54 ± 0.51 postoperatively （t = 6.59, P 〈 0.01, and t = 5.91, P 〈 0.01, respectively）. There were no differences between the two groups with respect to VAS and ODI scores. The ROM of stabilized segments decreased significantly from 7.8°± 2.4° to 4.5° ± 1.5° （t = 7.18, P 〈 0.05）, while the upper adjacent segments increased significantly from 8.3° ± 2.4° to 10.4° ± 2.4° （t = 2.87, P = 0.01）. The change in disc height of stabilized segments was not significant （11.9 ±2.1 preoperatively vs. 12.5 ± 1.5 postoperatively, t = 1.43, P = 0.15）, whereas t

关键词： Adjacent Segment Degeneration Dynamic Stabilization: Dynesys Lumbar Spinal Stenosis Lumbar Spondylolisthesis

The THU-NAOC transient survey: the performance and results from the first year

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Research in Astronomy and Astrophysics 2015年第2期15卷 215-224页

作者： tian-Meng zhang Xiao-Feng Wang Jun-cheng Chen Ju-Jia zhang li Zhou Wen-Xiong li Qing liu Jun Mo Kai-cheng zhang Xin-Yu Yao Xu-lin Zhao Xu Zhou Jun-Dan Nie Fang Huang Zhao-Ji jiang Jun Ma ling-Zhi Wang Chao Wu Zhi-min Zhou Hu Zou li-Fan Wang Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Physics Department and Tsinghua Center for Astrophysics Tsinghua University Yunnan Observatories Chinese Academy of Sciences Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of Sciences University of Chinese Academy of Sciences Purple Mountain Observatory Chinese Academy of Sciences Astronomy Department Beijing Normal University National Astronomical Observatories Chinese Academy of Sciences

The Tsinghua University-National Astronomical Observatories, Chinese Academy of Sciences （NAOC） Transient Survey is an automatic survey that conducts a systematic exploration of optical transients. This project utilizes a 60/90 cm Schmidt telescope at the xinglong Station of NAOC. This survey repeatedly covers - 1000 square degrees of the northern sky with a cadence of 34 d. With an exposure of 60 s, the survey reaches a limiting unfiltered magnitude of about 19.5 mag, which enables us to discover supernovae in their relatively young stages. We describe the overall performance of our survey during the first year and present some preliminary results.

关键词： supernovae quasars and active galactic nuclei stars

Genetic diversity center of cultivated soybean(Glycine max) in China——New insight and evidence for the diversity center of Chinese cultivated soybean

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Journal of Integrative Agriculture 2016年第11期15卷 2481-2487页

作者： WANG li-xia lin Fan-yun li lin-hai li Wei YAN Zhe LUAN Wei-jiang PIAO Ri-hua guan Yuan NING Xue-cheng ZHU li MA Yan-song DONG Zhi-min zhang Hai-yan zhang Yue-qiang guan Rong-xia li Ying-hui liU zhang-xiong CHANG Ru-zhen QIU li-juan The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI)/Key Laboratory of Germplamsm Utilization Ministry of Agiculture/Institute of Crop SciencesChinese Academy of Agricultural Sciences College of Agriculture Northwest A & F University College of Agriculture Northeast Agricultural University College of Science and Technology Xinjiang Agricultural University Department of Agronomy Jilin Agricultural University Department of Agronomy Liaoning Agricultural University

Information on the center of genetic diversity of soybean（Glycine max） will be helpful not only for designing efficient strategies for breeding programs, but also for understanding the domestication and origin of this species. Here, we describe an analysis of genetic diversity based on simple-sequence repeat（SSR） variations within a core collection of 2 111 accessions of Chinese soybean landraces. Prior to the diversity assessment, the geographic origin of each accession was mapped. The map was then divided into grids each 2.5° in latitude and 5° in longitude. We found two regions that had higher number of alleles（NA） and greater polymorphic information content（PIC） values than the others. These regions are adjacently located within grid position of 30°–35°N×105°–110°E, which includes the valley of the middle and lower reaches of the Wei River, and the valley of the upper reaches of the Hanjiang River. It was also observed that in many regions, genetic diversity decreased with the increase in distance from the center. Another region, in northern Hebei Province（115°–120°E×40°–42.5°N）, was observed having higher diversity than any surrounding regions, indicating that this is a sub-center of soybean diversity. Based on the presented results, the domestication and origin of soybean are also discussed.

关键词： Glycine max genetic resources SSRs diversity center domestication

Taking the pulse of COVID-19:a spatiotemporal perspective

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International Journal of Digital Earth 2020年第10期13卷 1186-1211页

作者： Chaowei Yang Dexuan Sha Qian liu Yun li Hai Lan Weihe Wendy guan Tao Hu Zhenlong li Zhiran zhang John Hoot Thompson Zifu Wang David Wong Shiyang Ruan Manzhu Yu Douglas Richardson Luyao zhang Ruizhi Hou You Zhoua cheng Zhong Yifei tian Fayez Beaini Kyla Carte Colin Flynn Wei liu Dieter Pfoser Shuming bao Mei li Haoyuan zhang Chunbo liu Jie jiang Shihong Du liang Zhao mingyue Lu lin li Huan Zhou Andrew Ding NSF Spatiotemporal Innovation Center George Mason Univ.FairfaxVAUSA Department of Geography and GeoInformation Science George Mason Univ.FairfaxVAUSA Department of Geographical Sciences University of MarylandCollege ParkMDUSA Center for Geographic Analysis Harvard UniversityCambridgeMAUSA Geoinformation and Big Data Research Lab Department of GeographyUniversity of South CarolinaColumbiaSCUSA Chinese Academy of Surveying and Mapping BeijingPeople’s Republic of China School of Resource and Environmental Sciences Wuhan UniversityWuhanPeople’s Republic of China Cloud Computeand Storage OperationsInformation Technology ServicesGeorge Mason UniversityFairfaxVAUSA Department of Geography Pennsylvania State UniversityState CollegePAUSA School of Business Management East China Normal UniversityShanghaiPeople’s Republic of China School of Mathematical Sciences East China Normal UniversityShanghaiPeople’s Republic of China Department of Psychology George Mason UniversityFairfaxVAUSA mDepartment of Computer Science George Mason UniversityFairfaxVAUSA Department of Information Technology George Mason UniversityFairfaxVAUSA Department of Biology George Mason UniversityFairfaxVAUSA College of Land Science and Technology China Agricultural UniversityBeijingPeople’s Republic of China China Data Institute Ann ArborMIUSA Institute of Remote Sensing and GIS Peking UniversityBeijingPeople’s Republic of China Aerospace Information Research Institute Chinese Academy of SciencesBeijingPeople’s Republic of China School of Geomatics and Urban Spatial Informatics Beijing University of Civil Engineering and ArchitectureBeijingPeople’s Republic of China School of Geographical Sciences Nanjing University of Information Science&TechnologyNanjingPeople’s Republic of China School of Geodesy and Geomatics Wuhan UniversityWuhanPeople’s Republic of China wFaculty of Environment University of WaterlooWaterlooCanada

The sudden outbreak of the Coronavirus disease(COVID-19)swept across the world in early 2020,triggering the lockdowns of several billion people across many countries,including China,Spain,India,the U.K.,Italy,France,Germany,Brazil,Russia,and the *** transmission of the virus accelerated rapidly with the most confirmed cases in the U.S.,India,Russia,and *** response to this national and global emergency,the NSF Spatiotemporal Innovation Center brought together a taskforce of international researchers and assembled implementation strategies to rapidly respond to this crisis,for supporting research,saving lives,and protecting the health of global *** perspective paper presents our collective view on the global health emergency and our effort in collecting,analyzing,and sharing relevant data on global policy and government responses,human mobility,environmental impact,socioeconomical impact;in developing research capabilities and mitigation measures with global scientists,promoting collaborative research on outbreak dynamics,and reflecting on the dynamic responses from human societies.

关键词： Big Data Earth system emergency geospatial sciences epidemics applications

Towards the full realization of the RIBLL2 beam line at the HIRFL-CSR complex

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Science Bulletin 2018年第2期63卷 78-80页

作者： bao-Hua Sun Jian-Wei Zhao Xue-Heng zhang li-Na Sheng Zhi-Yu Sun Isao Tanihata Satoru Terashima Yong Zheng li-Hua Zhu li-min Duan liu-Chun He Rong-jiang Hu guang-Shuai li Wen-Jian lin Wei-Ping lin Chuan-Ye liu Zhong liu Chen-Gui Lu Xin-Wen Ma li-Jun mao Yi tian Feng Wang Meng Wang Shi-Tao Wang Jia-Wen Xia Xiao-Dong Xu Hu-Shan Xu Zhi-Guo Xu Jian-cheng Yang Da-Yu Yin You-Jin Yuan Wen-Long Zhan Yu-Hu zhang Xiao-Hong Zhou School of Physics and Nuclear Energy Engineering Beihang University Beijing 100191 China International Research Center for Nuclei and Particles in the Cosmos Beijing 100191 China Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China

More than 99%of the mass in the visible universe—the material that makes up ourselves,our planet,stars—is in the atomic *** the matter has existed for billions of years,only over the past few decades have we had the tools and the knowledge necessary to get a basic understanding of the structure and dynamic of *** physicists around the world have made tremendous strides by initiating a broad range of key

关键词： HIRFL-CSR 横梁建筑群排队原子核物理学家试验性世界

Nondestructive technique for identifying nuclides using neutron resonance transmission analysis at CSNS Back-n

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Nuclear Science and Techniques 2024年第1期35卷 178-187页

作者： Sheng-Da Tang Yong-Hao Chen Jing-Yu Tang Rui-Rui Fan Qiang li Gong li Dong liu Zheng-Yao Jin xing-Zhu Cui tian-Xiang Chen Yi-Wei Yang Rong liu Han Yi Yang li Zhen Yang Qi An Hao-Fan Bai jiang-bo Bai Jie bao Ping Cao Qi-Ping Chen Zhen Chen Zeng-Qi Cui An-Chuan Fan Chang-Qing Feng Fan-Zhen Feng Ke-Qing Gao min-Hao Gu Chang-Cai Han Zi-Jie Han Guo-Zhu He Yong-cheng He Yang Hong Yi-Wei Hu Han-Xiong Huang Wei-Hua Jia Hao-yu jiang Wei jiang Zhi-jie jiang ling Kang bo li Chao li Jia-Wen li Xiao li Jie liu Shu-Bin liu guang-Yuan Luan Chang-Jun Ning Bin-Bin Qi Jie Ren Zhi-Zhou Ren Xi-Chao Ruan Zhao-Hui Song Kang Sun Zhi-Xin Tan li-Jiao Wang Peng-cheng Wang Zhao-Hui Wang Zhong-Wei Wen Xiao-guang Wu Xuan Wu li-Kun Xie Yong-Ji Yu Guo-Hui zhang lin-Hao zhang Mo-Han zhang Qi-Wei zhang Xian-Peng zhang Yu-liang zhang Yue zhang Zhi-Yong zhang mao-Yuan Zhao Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Institute of High-Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China USTC Archaeometry Laboratory University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China

Nondestructive and noninvasive neutron assays are essential applications of neutron *** resonance transmission analysis(NRTA)is a powerful nondestructive method for investigating the elemental composition of an *** back-streaming neutron line(Back-n)is a newly built time-of-flight facility at the China Spallation Neutron Source(CSNS)that provides neutrons in the eV to 300 MeV range.A feasibility study of the NRTA method for nuclide identification was conducted at the CSNS Back-n via two test *** results demonstrate that it is feasible to identify different elements and isotopes in samples using the NRTA method at *** study reveals its potential future applications.

关键词： CSNS White neutron beam NRTA Nuclide identification Nondestructive method

Measurement of the ^(232)Th(n,f)cross section in the 1-200 MeV range at the CSNS Back-n

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Nuclear Science and Techniques 2023年第8期34卷 142-153页

作者： Zhi-Zhou Ren Yi-Wei Yang Yong-Hao Chen Rong liu Bang-Jiao Ye Jie Wen Hai-Rui Guo Zi-Jie Han Qi-Ping Chen Zhong-Wei Wen Wei-li Sun Han Yi xing-Yan liu Tao Ye jiang-bo Bai Qi An Jie bao Yu bao Ping Cao Hao-Lei Chen Zhen Chen Zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Ke-Qing Gao Xiao-Long Gao min-Hao Gu Chang-Cai Han Guo-Zhu He Yong-cheng He Yang Hong Yi-Wei Hu Han-Xiong Huang Xi-Ru Huang Hao-Yu jiang Wei jiang Zhi-Jie jiang Han-Tao Jing ling Kang bo li Chao li Jia-Wen li Qiang li Xiao li Yang li Jie liu Shu-Bin liu Ze Long guang-Yuan Luan Chang-Jun Ning Meng-Chen Niu Bin-Bin Qi Jie Ren Xi-Chao Ruan Zhao-Hui Song Kang Sun Zhi-Jia Sun Zhi-Xin Tan Jing-Yu Tang Xin-Yi Tang Bin-Bin tian li-Jiao Wang Peng-cheng Wang Zhao-Hui Wang Xiao-guang Wu Xuan Wu li-Kun Xie Xiao-Yun Yang li Yu Tao Yu Yong-Ji Yu Guo-Hui zhang lin-Hao zhang Qi-Wei zhang Xian-Peng zhang Yu-liang zhang Zhi-Yong zhang Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China Institute of Applied Physics and Computational Mathematics Beijing 100088China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230027China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China

The ^(232)Th(n,f)cross section is very important in basic nuclear physics and applications based on the Th/U fuel *** the time-of-flight method and a multi-cell fast-fission ionization chamber,a novel measurement of the^(232)Th(n,f)cross sec-tion relative to^(235)U in the 1–200 MeV range was performed at the China Spallation Neutron Source Back-n white neutron source(Back-n).The fission event-neutron energy spectra of^(232)Th and^(235)U fission cells were measured in the single-bunch *** 232Th/235U fission cross-sectional ratios were obtained,and the measurement uncertainties were 2.5–3.7%for energies in the 2–20 MeV range and 3.6–6.2%for energies in the 20–200 MeV ***^(232)Th(n,f)cross section was obtained by introducing the standard cross section of^(235)U(n,f).The results were compared with those of previous theoreti-cal calculations,measurements,and *** measured 232Th fission cross section agreed with the main evaluation results in terms of the experimental uncertainty,and 232Th fission resonances were observed in the 1–3 MeV *** present results provide^(232)Th(n,f)cross-sectional data for the evaluation and design of Th/U cycle nuclear systems.

关键词： 232Th(n f)cross section Fast-fission ionization chamber Back-n white neutron source