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26篇 您的检索式:作者名="Guo FR"
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1Global Wheat Head Detection(GWHD)Dataset:A Large and Diverse Dataset of High-Resolution RGB-Labelled Images to Develop and Benchmark Wheat Head Detection Methods显示文摘The detection of wheat heads in plant images is an important task for estimating pertinent wheat traits including head population density and head characteristics such as health,size,maturity stage,and the presence of awns.Several studies have developed methods for wheat head detection from high-resolution RGB imagery based on machine learning algorithms.However,these methods have generally been calibrated and validated on limited datasets.High variability in observational conditions,genotypic differences,development stages,and head orientation makes wheat head detection a challenge for computer vision.Further,possible blurring due to motion or wind and overlap between heads for dense populations make this task even more complex.Through a joint international collaborative effort,we have built a large,diverse,and well-labelled dataset of wheat images,called the Global Wheat Head Detection(GWHD)dataset.It contains 4700 high-resolution RGB images and 190000 labelled wheat heads collected from several countries around the world at different growth stages with a wide range of genotypes.Guidelines for image acquisition,associating minimum metadata to respect FAIR principles,and consistent head labelling methods are proposed when developing new head detection datasets.The GWHD dataset is publicly available at http://www.global-wheat.com/and aimed at developing and benchmarking methods for wheat head detection.Etienne David Simon Madec Pouria Sadeghi-Tehran Helge Aasen Bangyou Zheng Shouyang Liu Norbert Kirchgessner Goro Ishikawa Koichi Nagasawa Minhajul A.Badhon Curtis Pozniak Benoit de Solan Andreas Hund Scott C.Chapman Frédéric Baret Ian Stavness Wei Guo 2020Plant Phenomics2020,2,1:13
2Exploring Seasonal and Circadian Rhythms in Structural Traits of Field Maize from LiDAR Time Series显示文摘Plant growth rhythm in structural traits is important for better understanding plant response to the ever-changing environment.Terrestrial laser scanning(TLS)is a well-suited tool to study structural rhythm under field conditions.Recent studies have used TLS to describe the structural rhythm of trees,but no consistent patterns have been drawn.Meanwhile,whether TLS can capture structural rhythm in crops is unclear.Here,we aim to explore the seasonal and circadian rhythms in maize structural traits at both the plant and leaf levels from time-series TLS.The seasonal rhythm was studied using TLS data collected at four key growth periods,including jointing,bell-mouthed,heading,and maturity periods.Circadian rhythms were explored by using TLS data acquired around every 2 hours in a whole day under standard and cold stress conditions.Results showed that TLS can quantify the seasonal and circadian rhythm in structural traits at both plant and leaf levels.(1)Leaf inclination angle decreased significantly between the jointing stage and bell-mouthed stage.Leaf azimuth was stable after the jointing stage.(2)Some individual-level structural rhythms(e.g.,azimuth and projected leaf area/PLA)were consistent with leaf-level structural rhythms.(3)The circadian rhythms of some traits(e.g.,PLA)were not consistent under standard and cold stress conditions.(4)Environmental factors showed better correlations with leaf traits under cold stress than standard conditions.Temperature was the most important factor that significantly correlated with all leaf traits except leaf azimuth.This study highlights the potential of time-series TLS in studying outdoor agricultural chronobiology.Shichao Jin Yanjun Su Yongguang Zhang Shilin Song Qing Li Zhonghua Liu Qin Ma Yan Ge LingLi Liu Yanfeng Ding Frédéric Baret Qinghua Guo 2021Plant Phenomics2021,3,1:5
3Global Wheat Head Detection 2021:An Improved Dataset for Benchmarking Wheat Head Detection Methods显示文摘The Global Wheat Head Detection(GWHD)dataset was created in 2020 and has assembled 193,634 labelled wheat heads from 4700 RGB images acquired from various acquisition platforms and 7 countries/institutions.With an associated competition hosted in Kaggle,GWHD_2020 has successfully attracted attention from both the computer vision and agricultural science communities.From this first experience,a few avenues for improvements have been identified regarding data size,head diversity,and label reliability.To address these issues,the 2020 dataset has been reexamined,relabeled,and complemented by adding 1722 images from 5 additional countries,allowing for 81,553 additional wheat heads.We now release in 2021 a new version of the Global Wheat Head Detection dataset,which is bigger,more diverse,and less noisy than the GWHD_2020 version.Etienne David Mario Serouart Daniel Smith Simon Madec Kaaviya Velumani Shouyang Liu Xu Wang Francisco Pinto Shahameh Shafiee Izzat SATahir Hisashi Tsujimoto Shuhei Nasuda Bangyou Zheng Norbert Kirchgessner Helge Aasen Andreas Hund Pouria Sadhegi-Tehran Koichi Nagasawa Goro Ishikawa Sébastien Dandrifosse Alexis Carlier Benjamin Dumont Benoit Mercatoris Byron Evers Ken Kuroki Haozhou Wang Masanori Ishii Minhajul ABadhon Curtis Pozniak David Shaner LeBauer Morten Lillemo Jesse Poland Scott Chapman Benoit de Solan Frédéric Baret Ian Stavness Wei Guo 2021Plant Phenomics2021,3,1:2
4Engineering of dendritic dopant-free hole transport molecules:enabling ultrahigh fill factor in perovskite solar cells with optimized dendron construction显示文摘Developing dopant-free hole-transporting materials(HTMs)for high-performance perovskite solar cells(PVSCs)has been a very active research topic in recent years since HTMs play a critical role in optimizing interfacial charge carrier kinetics and in turn determining device performance.Here,a novel dendritic engineering strategy is first utilized to design HTMs with a D-A type molecular framework,and diphenylamine and/or carbazole is selected as the building block for constructing dendrons.All HTMs show good thermal stability and excellent film morphology,and the key optoelectronic properties could be fine-tuned by varying the dendron structure.Among them,MPA-Cz-BTI and MCz-Cz-BTI exhibit an improved interfacial contact with the perovskite active layer,and non-radiative recombination loss and charge transport loss can be effectively suppressed.Consequently,high power conversion efficiencies(PCEs)of 20.8%and 21.35%are achieved for MPA-Cz-BTI and MCz-Cz-BTI based devices,respectively,accompanied by excellent long-term storage stability.More encouragingly,ultrahigh fill factors of 85.2%and 83.5%are recorded for both devices,which are among the highest values reported to date.This work demonstrates the great potential of dendritic materials as a new type of dopant-free HTMs for high-performance PVSCs with excellent FF.Wei Chen Yang Wang Bin Liu Yajun Gao Ziang Wu Yongqiang Shi Yumin Tang Kun Yang Yujie Zhang Weipeng Sun Xiyuan Feng Frédéric Laquai Han Young Woo Aleksandra B.Djurisic Xugang Guo Zhubing He 2021Science China Chemistry2021,64,1:2
5Two strategies to in- tensify evidence-based medicine education of undergrad- uate students: a randomised controlled trial显示文摘Cheng HM Guo FR Hsu TF 2012Ann Acad Med2012,41,1:1
6Review of telemedicineprojects in Taiwan 显示文摘Chen HS Guo FR Chen CY 2001International Journal of MedicalInformatics2001,61,23:1
7Analysis of Flavonoid Constituents From Leaves of Acanthopanax senticosus Harms by Electrospray Tandem Mass Spectrometry显示文摘 Song FR Guo MQ 2002Rapid Commun Mass Spectrom2002,16,:1
8The roles of IL-2 and IL-10 enhance anti-CD45RBmAb immune in- hibition in allograft skin显示文摘GUO WJ QI H DENG CY ZHOU HX DENG SP LI FR 2015Immunol Res2015,61,3:1
9Isolation and characterization of methyl esters and derivatives from Euphorbia kansui (Euphorbiace- ae) and their inhibitory effects on the human SGC-7901 cells显示文摘Yu FR Lian XZ Guo HY 2005J Pharm Pharm Sei2005,8,3:1
10Isolation and characterization of methyl esters and derivatives from Euphorbia kansui (Euphorbiacead and their inhibitory effects on the human SGC-7901 cells显示文摘Yu FR Lian XZ Guo HY 2005J Pharm Sci2005,278,3:1
11Preparation of carboplatin- Fe@C-loaded chitosan nanoparticles and study on hyper- thermia combined with pharmacotherapy for liver cancer显示文摘Li FR Yan WH Guo YH 2009Int J Hyperthermia2009,25,5:1
12Activation and sensitization of C and Aδ afferent fibers mediated by P2X receptors 显示文摘Zhang Q Zhao Y Guo Y Cao DY Tang XD Tian YL Yao FR Wang HS 2006Brain Res2006,1102,:1
13Rapid analysis of a triterpenoid saponin mixture from plant extracts by electrospray ionization multistage tandem mass spectrometry显示文摘Guo MQ Song FR Bai Y 2002Anal Sci2002,18,:1
14Cloned,stably expressed parathyroid hormone (PTH)/PTH-related peptide receptors activate multiple messenger signals and biological responses in LLC-PK1 kidney cells显示文摘Bringhurst FR Juppner H Guo J 1993Endocrinology1993,132,5:1
15Isolation and characterization of methyl esters and derivatives from Euphorbia kansui (Eupllorbiaceae) and their inhibitory, effects on the human SGC-790I celts 显示文摘Yu FR Lian XZ Guo HY 2005J Pharm Pharm Sci2005,278,3:1
16Systemic oxidative stress induced by intratracheal instilling with PM10 in rats显示文摘Lu XL Zhang XR Deng FR Guo XB 2011J Peking Univ2011,43,3:1
17Cyclic adenosine monophosphate/ protein kinase A mediates parathyroid hormone/parathyroid hormone-related protein receptor regulation of osteoclastogenesis and expression of RANKL and osteoprotegerin mRNAs by marrow stromal cells显示文摘Kondo H Guo J Bringhurst FR 2002J Bone Miner Res2002,17,9:1
18Membrane transport of camptotheein: facilitation by human P-glyeoprotein ( ABCB1 ) and multidrug resistance protein 2 (ABCC2) 显示文摘Lalloo AK Luo FR Guo A Paranjpe PV Lee SH Vyas V 2004BMC Med2004,2,:1
19Recent advances in telemedicine显示文摘Chen HS Guo FR LeeRG 1999J FormosMed Assoc1999,98,11:1
20Cyclic adenosine monophosphate/protein kinase A mediates parathyroid hormone/parathyroidhormone-related protein receptor regulation of osteoclastogenesisand expression of RANKL and osteoprotegerin mRNAs by marrowstromal cells显示文摘Kondo H Guo J Bringhurst FR 2002J Bone Miner Res2002,17,9:1
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