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An artificial intelligence enhanced star identification algorithm

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Frontiers of Information Technology & Electronic Engineering 2020年第11期21卷 1661-1670页

作者： Hao WANG Zhi-yuan WANG Ben-dong WANG Zhuo-qun YU Zhong-he JIN john l.CRASSIDIS School of Aeronautics and Astronarutics Zhejiang UniversityHangzhou 310027China Department of Mechanical and Aerospace Engineering University at BuffaloState University of New YorkAmherstNY 14260-4400USA

An artificial intelligence enhanced star identification algorithm is proposed for star trackers in lost-inspace mode.A convolutional neural network model based on Vgg16 is used in the artificial intelligence algorithm to classify star *** training dataset is constructed to achieve the networks’optimal *** results show that the proposed algorithm is highly robust to many kinds of noise,including position noise,magnitude noise,false stars,and the tracker’s angular *** a deep convolutional neural network,the identification accuracy is maintained at 96%despite noise and interruptions,which is a significant improvement to traditional pyramid and grid algorithms.

关键词： Star tracker lost-in-space Star identification Convolutional neural network

Research advances on internal processes affecting tropical cyclone intensity change from 2018–2022

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Tropical Cyclone Research and Review 2023年第1期12卷 10-29页

作者： Xiaomin Chen Christopher M.Rozoff Robert F.Rogers Kristen l.Corbosiero Dandan Tao Jian-Feng Gu Falko Judt Eric A.Hendricks Yuqing Wang Michael M.Bell Daniel P.Stern Kate D.Musgrave john A.Knaff john Kaplan NOAA/OAR/Atlantic Oceanographic and Meteorological laboratory MiamiUSA University of Alabama in Huntsville HuntsvilleUSA National Center for Atmospheric Research BoulderUSA University at Albany/State University of New York AlbanyUSA University of Bergen BergenNorway Nanjing University NanjingChina University of Reading ReadingUK University of Hawaii at Manoa HonoluluUSA Colorado State University Fort CollinsUSA University Corporation for Atmospheric Research MontereyUSA NOAA Center for Satellite Applications and Research Fort CollinsUSA Department of Atmospheric and Earth Science University of Alabama in HuntsvilleHuntsvilleUSA

This contribution summarizes the significant progress in a variety of topic areas related to internal tropical cyclone(TC)intensity change processes over 2018–2022 from the WMO Tenth International Workshop on Tropical Cyclones(IWTC-10).These topic areas include surface and boundary layer processes;TC internal structure and microphysical processes;and,radiation interactions with *** studies better frame the uncertainty in the surface drag and enthalpy coefficients at high wind *** parameters greatly impact TC intensity and it is therefore important that more direct measurements of these boundary layer parameters are *** significant scientific strides have been made in TC boundary *** advancements have been achieved through improved coupled models,large-eddy simulations,theoretical advance-ments,and detailed *** is now clear that the research field needs to better represent the eddy viscosity throughout the depth of the boundary ***,detailed study of coherent structures in TC boundary layers will likely be a propitious direction for the research ***,in-depth observational field campaigns and assiduous data analysis have made significant headway into verifying theory and modeling studies of intensification processes related to TC vortex alignment,efficient latent heating distributions,and overall 3D *** efforts have also been made to better understand the intricate roles radiative processes play in TC evolution and intensity ***,some promising progress has been made in the development of time-dependent theories of TC intensification and the predictability of internal TC intensity ***,there have been well-earned gains in the understanding of intensity change processes intrinsic to the TC system,but the journey is not *** paper highlights some of the most relevant and important research areas that are still shedding new light into internal fa

关键词： Tropical cyclone Intensity Internal dynamics Boundary-layer processes Observations Predictability

Yersinia pestis: examining wildlife plague surveillance in China and the USA

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Integrative Zoology 2012年第1期7卷 99-109页

作者： Sarah N.BEVINS john A.BAROCH Dale l.NOlTE Min ZHANG Hongxuan HE US Department of Agriculture Wildlife ServicesNational Wildlife Disease ProgramFort CollinsColoradoUSA Chinese Academy of Sciences Institute of ZoologyBeijingChina

Plague is a zoonotic disease caused by the bacterium Yersinia pestis lehmann and Neumann,*** it is essentially a disease of rodents,plague can also be transmitted to ***,plague has caused mas-sive morbidity and mortality events in human populations,and has recently been classified as a reemerging dis-ease in many parts of the *** public health threat has led many countries to set up wild and domestic an-imal surveillance programs in an attempt to monitor plague activity that could potentially spill over into human *** China and the USA have plague surveillance programs in place,but the disease dynamics dif-fer in each *** present data on plague seroprevalence in wildlife and review different approaches for plague surveillance in the 2 *** need to better comprehend plague dynamics,combined with the fact that there are still several thousand human plague cases per year,make well-designed wildlife surveillance pro-grams a critical part of both understanding plague risks to humans and preventing disease outbreaks in the future.

关键词： plague sentinel species surveillance Yersinia pestis

Contrasting female mate preferences for red coloration in a fish

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Current Zoology 2020年第4期66卷 425-433页

作者： Charel Reulaimd Brett M.CulBERT Alessandro Devigili Ariel F.Kahrl john l.Fitzpatrick Department of Zoology Stockholm UniversityStockholmSE-10691Sweden Department of Integrative Biology University of GuelphGuelphN1G 2W1Canada

Understanding how animals select their mates requires knowing the factors that shape mate *** theoretical and empirical considerations suggest that female mating status can influence the degree to which a female engages in mate choice,with virgin females predicted to be less choosy than mated *** this study,we investigated mate choice in both virgin and mated females in the pygmy halfbeak Dermogenys *** are small,live-bearing,internally fertilizing freshwater fish that live in mixed-sex groups where females have ample opportunity to engage in mate *** a dichotomous choice assay,we quantified and contrasted in virgin and mated females mate preferences for differences in male body size,beak size,and area of yellow and red *** also examined how mating status influenced the amount of time a female associated with the first male encountered and the relative amount of time a female associated with each *** demonstrate that mate preferences of female halfbeaks are driven primarily by the size of red coloration present on *** showed contrasting preferences based on mating status,with virgin females preferentially associating with drab males whereas mated females preferentially associate with males possessing large areas of *** to expectations,female mating status did not influence how females associate with the first males encountered or how females biased their association time among *** the precise drivers of these effects need further studying,our finding highlights a possible explanation for how variation in male ornamentation can be maintained.

关键词： Dermogenys collettei experience plasticity pygmy halfbeak reproductive status sexual selection sperm competition

Influence of MnO_(x)deposition on TiO_(2)nanotube arrays for electrooxidation

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Green Energy & Environment 2023年第2期8卷 612-618页

作者： Kaihang Zhang Yuanzheng Zhang Su liu Xin Tong Junfeng Niu Dong Wang Junchen Yan Zhaoyang Xiong john Crittenden Brook Byers Institute of Sustainable Systems and School of Civil and Environmental Engineering Georgia Institute of TechnologyAtlantaGA 30332USA College of Environmental Science and Engineering North China Electric Power UniversityBeijing102206China

TiO_(2)has demonstrated outstanding performance in electrochemical advanced oxidation processes(EAOPs)due to its structural stability and high oxygen ***,there is still much room for improving its electrochemical ***,narrow bandgap manganese oxide(MnO_(x))was composited with TiO_(2)nanotube arrays(TiO_(2)NTAs)that in-situ oxidized on porous Ti sponge,forming the MnO_(x)-TiO_(2)NTAs *** and XPS analysis further proved that the composition of MnO_(x)is *** characterizations revealed that increasing the composited concentration of MnO_(x)can improve the conductivity and reduce oxygen evolution potential so as to improve the electrochemical activity of the composited MnO_(x)-TiO_(2)NTAs ***,the optimal degradation rate of benzoic acid(BA)was achieved using MnO_(x)-TiO_(2)NTAs with a MnO_(x)concentration of 0.1 mmol l^(-1),and the role of MnO_(x)was proposed based on DFT ***,the required electrical energy(EE/O)to destroy BA was optimized by varying the composited concentration of MnO_(x)and the degradation *** quantitative results are of great significance for the design and application of high-performance materials for EAOPs.

关键词： TiO_(2)nanotube arrays Oxidation mechanism Energy efficiency assessment MnO_(x)band structure Electrochemical advanced oxidation processes

SlC11A1 polymorphisms in inflammatory bowel disease and Mycobacterium avium subspecies paratuberculosis status

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World Journal of Gastroenterology 2010年第45期16卷 5727-5731页

作者： lucy C Stewart Andrew S Day john Pearson Murray l Barclay Richard B Gearry Rebecca l Roberts Robert W Bentley Department of Paediatrics University of OtagoChristchurch 8140New Zealand Department of Paediatrics Christchurch HospitalChristchurch 8140New Zealand Department of Pathology University of OtagoChristchurch 8140New Zealand Department of Medicine University of OtagoChristchurch 8140New Zealand Department of Gastroenterology Christchurch HospitalChristchurch 8140New Zealand Department of Biochemistry University of OtagoDunedin 9054New Zealand

AIM: To test for association of SlC11A1 with inflammatory bowel disease (IBD) and Mycobacterium avium subspecies paratuberculosis (MAP) status in a Caucasian cohort. METHODS: Five hundred and seven Crohn's disease (CD) patients, 474 ulcerative colitis (UC) patients, and 569 healthy controls were genotyped for SlC11A1 1730G>A and SlC11A1 469+14G>C using pre-designed TaqMan  SNP assays. χ 2 tests were applied to test for association of single nucleotide polymorphisms (SNPs) with disease, and the presence of MAP ***:SlC11A1 1730G>A and SlC11A 1469+14G>C were not associated with CD, UC, or IBD. The SlC11A1 1730A minor allele was over-represented in patients who did not require immunomodulator therapy (P = 0.002, OR: 0.29, 95% CI: 0.13-0.66). The frequency of the SlC11A1 469+14C allele was higher in the subset of study participants who tested positive for MAP DNA (P = 0.02, OR: 1.56, 95% CI: 1.06-2.29). No association of SlC11A1 1730G>A with MAP was ***: Although SlC11A1 was not associated with IBD, association with MAP suggests that SlC11A1 is important in determining susceptibility to bacteria implicated in the etiology of CD.

关键词： NRAMP1 Crohn’s disease Ulcerative colitis IS900 polymerase chain reaction

Genetically modifying transcription factors to promote CNS axon regeneration

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Neural Regeneration Research 2017年第5期12卷 737-738页

作者： Saloni T.Mehta john l.Bixby Vance P.lemmon Miami Project to Cure Paralysis University of Miami Miller School of Medicine Miami FL USA Center for Computational Science University of Miami Miller School of Medicine Miami FL USA Neurological Surgery University of Miami Miller School of Medicine Miami FL USA Molecular & Cellular Pharmacology University of Miami Miller School of Medicine Miami FL USA

Following injury to the central nervous system（CNS）,severed axons fail to regenerate and re-form functional ***,CNS neurons appear to lack the intrinsic ability to modify their gene expression patterns to activate a robust regenerative response,perhaps as a result of limited plasticity in the adult brain（Davis,2013）.On the other hand,

关键词： CNS gene Jun VP

PRISMS-Fatigue computational framework for fatigue analysis in polycrystalline metals and alloys

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npj Computational Materials 2021年第1期7卷 349-360页

作者： Mohammadreza Yaghoobi Krzysztof S.Stopka Aaditya lakshmanan Veera Sundararaghavan john E.Allison David l.McDowell Materials Science and Engineering University of MichiganAnn ArborMIUSA Woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlantaGAUSA Aerospace Engineering University of MichiganAnn ArborMIUSA School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGAUSA

The PRISMS-Fatigue open-source framework for simulation-based analysis of microstructural influences on fatigue resistance for polycrystalline metals and alloys is presented *** framework uses the crystal plasticity finite element method as its microstructure analysis tool and provides a highly efficient,scalable,flexible,and easy-to-use ICME community *** PRISMS-Fatigue framework is linked to different open-source software to instantiate microstructures,compute the material response,and assess fatigue indicator *** performance of PRISMS-Fatigue is benchmarked against a similar framework implemented using *** indicate that the multilevel parallelism scheme of PRISMS-Fatigue is more efficient and scalable than ABAQUS for large-scale fatigue *** performance and flexibility of this framework is demonstrated with various examples that assess the driving force for fatigue crack formation of microstructures with different crystallographic textures,grain morphologies,and grain numbers,and under different multiaxial strain states,strain magnitudes,and boundary conditions.

关键词： fatigue alloys grain

NOD2 and ATG16l1 polymorphisms affect monocyte responses in Crohn's disease

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World Journal of Gastroenterology 2011年第23期17卷 2829-2837页

作者： Dylan M Glubb Richard B Gearry Murray l Barclay Rebecca l Roberts john Pearson Jacqui I Keenan Judy McKenzie Robert W Bentley Department of Medicine University of ChicagoIL 60637-1470United States Department of Medicine University of OtagoChristchurch8140New Zealand Department of Gastroenterology Christchurch HospitalChristchurch8140New Zealand Department of Biochemistry University of OtagoDunedin9054New Zealand Department of Pathology University of OtagoChristchurch8140New Zealand Department of Surgery University of OtagoChristchurch8140New Zealand Department of Haematology University of OtagoChristchurch8140New Zealand Department of Paediatrics University of OtagoChristchurch8140New Zealand

AIM:To assess whether polymorphisms in NOD2 and ATG16l1 affect cytokine responses and mycobacterium avium subspecies paratuberculosis (MAP) survival in monocytes from Crohn's disease (CD) ***:Monocytes were isolated from peripheral blood of CD patients of known genotype for common single nucleotide polymorphisms of NOD2 and *** were challenged with MAP and bacterial persistence assessed at subsequent *** responses were assayed using a Milliplex multi-analyte profiling assay for 13 ***:Monocytes heterozygous for a NOD2 polymorphism (R702W,P268S,or 1007fs) were more permissive for growth of MAP (P=0.045) than those *** was no effect of NOD2 genotype on subsequent cytokine *** T300A polymorphism ofATG16l1 did not affect growth of MAP in our model (P=0.175),but did increase expression of cytokines interleukin (Il)-10 (P=0.047) and Il-6 (P=0.019).CONClUSION:CD-associated polymorphisms affected the elimination of MAP fromex vivo monocytes (NOD2),or expression of certain cytokines (ATG16l1),implying independent but contributory roles in the pathogenesis of CD.

关键词：单核苷酸多态性单核细胞反应细胞因子结核分枝杆菌白细胞介素基因多态性 MAP