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Efficient Convex Optimization Approaches to Variational Image Fusion

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Numerical Mathematics(Theory,Methods and Applications) 2014年第2期7卷 234-250页

作者： Jing Yuan Brandon Miles greg Garvin Xue-Cheng Tai Aaron Fenster Medical Imaging Lab Robarts Research InstituteUniversity of Western OntarioLondon ONCanada N6A 5B7 Department of Medical Imaging St Jospeh’s HealthCareLondon ONCanada Department of Mathematics University of BergenBergenNorway

Image fusion is an imaging technique to visualize information from multiple imaging sources in one single image,which is widely used in remote sensing,medical imaging *** this work,we study two variational approaches to image fusion which are closely related to the standard TV-L_(2) and TV-L_(1) image approximation *** investigate their convex optimization formulations,under the perspective of primal and dual,and propose their associated new image decomposition *** addition,we consider the TV-L_(1) based image fusion approach and study the specified problem of fusing two discrete-constrained images f_(1)(x)∈L_(1) and f_(2)(x)∈L_(2),where L_(1) and L_(2) are the sets of linearly-ordered discrete *** prove that the TV-L_(1) based image fusion actually gives rise to the exact convex relaxation to the corresponding nonconvex image fusion constrained by the discretevalued set u(x)∈L_(1)∪L_(2).This extends the results for the global optimization of the discrete-constrained TV-L_(1) image approximation[8,36]to the case of image *** a big numerical advantage of the two proposed dual models,we show both of them directly lead to new fast and reliable algorithms,based on modern convex optimization *** with medical images,remote sensing images and multi-focus images visibly show the qualitative differences between the two studied variational models of image *** also apply the new variational approaches to fusing 3D medical images.

关键词： Convex optimization primal-dual programming combinatorial optimization totalvariation regularization image fusion

Consolidation of soft clay foundation improved by geosyntheticreinforced granular columns:Numerical evaluation

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Journal of Rock Mechanics and Geotechnical Engineering 2021年第5期13卷 1173-1181页

作者： Nima R.Alkhorshid gregório L.S.Araujo Ennio M.Palmeira Institute of Integrated Engineering Federal University of Itajubáe Itabira CampusItabiraMinas Gerais35903-087Brazil Department of Civil and Environmental Engineering University of BrasíliaBrasíliaDistrito Federal70910-900Brazil

Soft clays are problematic soils as they present high compressibility and low shear *** are several methods for improving in situ conditions of soft *** on the geotechnical problem’s geometry and characteristics,the in situ conditions may require reinforcement to restrain instability and construction *** columns reinforced by geosynthetic material are widely used to reduce settlements of embankments on soft *** also accelerate the consolidation rate by reducing the drainage path’s length and increasing the foundation soil’s bearing *** this study,the performance of encased and layered granular columns in soft clay is investigated and *** numerical results show the significance of geosynthetic stiffness and the column length on the embankment ***,the results show that granular columns may play an important role in dissipating the excess pore water pressures and accelerating the consolidation settlements of embankments on soft clays.

关键词： Geosynthetic Embankment Granular column Consolidation Soft soil

A GLOBAL VIEW OF THE RELATIONSHIP BETWEEN ENSO AND TROPICAL CYCLONE FREQUENCIES

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Acta meteorologica Sinica 1994年第1期8卷 19-29页

作者：董克勤 greg J.Holland Chinese Academy of Meteorological Sciences Beijing 100081 Bureau of Meteorology Research Centre MelbourneAustralia

The relationship between tropical cyclone activity and ENSO is examined for the major cyclone regions using cross correlations,spectral analysis and composite analysis of eastern equatorial Pacific sea surface temperature,the normalised monthly Southern Oscillation Index(SOI),and tropical cyclone *** closest relationship between the 3—4 year ENSO period and tropical cyclone activity was found in the western North Pacific west of 160°E and there seems to be significant potential for seasonal forecasting in this region based on ENSO parameters *** significant relationships were found for the North Indian Ocean,and the remainder of the basins were dominated by oscillations near the quasi-biennial *** explanations and forecasting of the seasonal variations in tropical cyclone num- bers in these regions will need to account for the QBO as well as the 3—4 year ENSO connections.

关键词： tropical cyclone El Nino Southern Oscillation

Disparities in employment outcomes among critical care graduates with different training backgrounds

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Emergency and Critical Care Medicine 2023年第4期3卷 163-170页

作者： greg J.Eisinger Patrick J.Sylvester Dheeraj Duggineni David P.Way Jing Peng Jiang Ma Jennifer W.McCallister Matthew C.Exline Division of Pulmonary Critical Care and Sleep Medicine Department of Internal MedicineThe Ohio State University Wexner Medical CenterColumbusOHUSA Team Health KnoxvilleTNUSA Department of Emergency Medicine The Ohio State University Wexner Medical CenterColumbusOHUSA Department of Biomedical Informatics The Ohio State UniversityColumbusOHUSA

Background:We sought to characterize the impact of critical care training pathways on subsequent employment ***:A survey assessing the postfellowship work environment and barriers to employment in a preferred setting was electronically distributed on September 16,2019,to program directors and coordinators at all US adult critical care fellowships with instructions to for-ward it to the prior year’s ***:Data collection was interrupted by the coronavirus disease 2019 ***-nine participants were included,reflecting a low rate of *** worked in urban areas(76.6%)at academic hospitals(81.7%).Graduates of internal medicine critical care(IMCC)were more likely than pulmonary critical care(PCC)to report their fellowship as a barrier to employment(50%vs 0%;P<0.05).Emergency medicine graduates were more likely than internal medicine to report their residency as a barrier to employment(83.3%vs 4.6%;P<0.05).Inability to find a desired position at an academic center(50%vs 5.9%;P<0.05)and in the preferred metropolitan setting(37.5%vs 0%;P<0.05)were more common among IMCC than ***:In this survey of critical care graduates,residency in emergency medicine and fellowship in IMCC were associated with in-creased barriers to finding desired employment.

关键词： Bias Critical care Critical care workforce Employment medicine Employment barriers Employment opportunities Fellowship training Job market Residency training

Flor Revisited(Again):eQTL and Mutational Analysis of NB-LRR Mediated Immunity to Powdery Mildew in Barley

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Journal of Integrative Agriculture 2014年第2期13卷 237-243页

作者： Roger Wise Priyanka Surana greg Fuerst Ruo Xu Divya Mistry Julie Dickerson Dan Nettleton Corn Insects and Crop Genetics Research Unit U.S.Department of Agriculture-Agricultural Research ServiceIowa State UniversityAmesIowa 50011USA Department of Plant Pathology & Microbiology Center for Plant Responses to Environmental StressesIowa State UniversityAmesIowa 50011USA Bioinformatics and Computational Biology Graduate Program Iowa State UniversityAmesIowa 50011USA Department of Statistics Iowa State UniversityAmesIowa 50011USA Department of Electrical and Computer Engineering Iowa State UniversityAmesIowa 50011USA

Genes encoding early signaling events in pathogen defense often are identified only by their phenotype. Such genes involved in barley-powdery mildew interactions include Mla, specifying race-specific resistance; Rarl （Required for Mla12-specified resistance1）, and Roml （Restoration of Mla-specified resistancel）. The HSP90-SGT1-RAR1 complex appears to function as chaperone in MLA-specified resistance, however, much remains to be discovered regarding the precise signaling underlying plant immunity. Genetic analyses of fast-neutron mutants derived from CI 16151 （Mla6） uncovered a novel locus, designated Rar3 （R_equired for Mla6-specified resitance3）. Rar3 segregates independent of Mla6 and Rarl, and rar3 mutants are susceptible to Blumeria graminis f. sp. hordei （Bgh） isolate 5874 （A VRar）, whereas, wild-type progenitor plants are resistant. Comparative expression analyses of the rar3 mutant vs. its wild-type progenitor were conducted via Barleyl GeneChip and GAIIx paired-end RNA-Seq. Whereas Rarl affects transcription of relatively few genes; Rar3 appears to influence thousands, notably in genes controlling ATP binding, catalytic activity, transcription, and phosphorylation; possibly membrane bound or in the nucleus, eQTL analysis of a segregating doubled haploid population identified over two-thousand genes as being regulated by Mla （q value/FDR=0.00001）, a subset of which are significant in Rar3 interactions. The intersection of datasets derived from mla-loss-of-function mutants, Mla-associated eQTL, and rar3-mediated transcriptome reprogramming are narrowing the focus on essential genes required for Mla-specified immunity.

关键词： eQTL transcript profiling immunity resistance signaling barley Blumeria graminis

Stable isotope paleohydrology and chemostratigraphy of the Albian Wayan Formation from the wedge-top depozone,North American Western Interior Basin

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Science China Earth Sciences 2017年第1期60卷 44-57页

作者： Jeffrey B.ROSS greg A.LUDVIGSON Andreas MOLLER Luis A.GONZALEZ J.D.WALKER Department of Geology University of Kansas Kansas Geological Survey University of Kansas

Understanding of the role of atmospheric moisture and heat transport in the climate system of the Cretaceous greenhouse world represents a major challenge in Earth system *** isotopic paleohydrologic data from mid-Cretaceous paleosols in North America,from paleoequatorial to paleoArctic latitudes,have been used to constrain the oxygen isotope mass balance of the Albian hydrologic *** the range from 40°-50°N paleolatitude,sideritic paleosols predominate,indicating paleoenvironments with positive precipitation-evaporation(P-E)*** exceptions occur on leeward side of the Sevier Orogen,where calcic paleosols in the wedge-top depozone record paleoenvironments with negative P-E balances in the orographic rain *** sections in the Wayan Formation of Idaho(WF)were sampled from the wedge-top *** units consist of stacked m-scale mudstone paleosols separated by m-scale sandstone-siltstone *** were sampled for organic carbon isotope profiles,and B-horizons from 6 well-developed paleosols were sampled for detrital zircons to determine maximum depositional *** first of these from the WF has produced a U-Pb concordia age of 101.0±1.1 *** same WF section has produced a stratigraphic trend of upwardly decreasingδ^(13)C values ranging from-24‰upwards to-27‰VPDB,suggesting correlation to the late Albian C15 C-isotope *** carbonates from the WF principally consist of micritic calcite,with carbon-oxygen isotope values that array along meteoric calcite lines(MCLs)withδ^(18)O values that range from-9.47‰up to-8.39‰*** approximately 42°N paleolatitude,these MCL values produce calculated paleoprecipitation values of-8.12‰to-7.04‰VSMOW,a range that is consistent with the estimates produced from other proxies at the same paleolatitudes across North *** results indicate that despite the orographic rain shadow effect,the processes of meridional atmospheric moisture transport in this locale were s

关键词：白垩纪古气候 Wayan 形成 Pedogenic 碳酸盐地球年代学

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人工智能揭示新冠死亡背后的主要疑点

科技纵览 2023年第8期 10-11页

作者： greg Uyeno 不详

医院就诊可以归结为疾病和结医果,而健康记录则是另外一回事,其中充满了医生的记录、病人的病史、生命体征、检验结果,可能跨越住院的几周时间。健康研究包含了数百名患者的所有这些数据。因此,随着人工智能数据处理技术的日益成熟,医... 详细信息

医院就诊可以归结为疾病和结医果,而健康记录则是另外一回事,其中充满了医生的记录、病人的病史、生命体征、检验结果,可能跨越住院的几周时间。健康研究包含了数百名患者的所有这些数据。因此,随着人工智能数据处理技术的日益成熟,医生将健康视为一个人工智能和大数据问题。

关键词：人工智能数据处理技术数据问题健康记录生命体征检验结果医院就诊医生

Pelleting characteristics of selected biomass with and without steam explosion pretreatment

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International Journal of Agricultural and Biological Engineering 2010年第3期3卷 62-79页

作者： Phani Adapa Lope Tabil greg Schoenau Anthony Opoku Department of Agricultural and Bioresource Engineering University of SaskatchewanSaskatoonSKCanada S7N 5A9 Department of Mechanical Engineering University of SaskatchewanSaskatoonSKCanadaS7N 5A9

Processing and densification of agricultural biomass into high density and durable pellets are critical to facilitate handling,storage and *** pelleting experiments were designed to conduct single and pilot scale pelleting of non-treated and steam exploded barley,canola,oat and wheat straw grinds acquired from 6.4,3.2,1.6 and 0.8 mm hammer mill screen sizes at 10%moisture content(wb).Single-pelleting was performed by applying compression pressures of 31.6,63.2,94.7,and 138.9 MPa using a close-fit plunger die assembly(die length 135.3 mm and diameter of(6.30±0.5)mm).During pilot scale pelleting,customization of ground straw material was performed by adding steam exploded biomass in increments of 25%to non-treated ground straw for respective biomass at specific grind *** straw samples were conditioned to 17.5%moisture content and 10%flaxseed oil was added to increase the bulk density and flowability of grinds,which resulted in the production of *** quality of pellets from single pelleting experiments was ascertained by measuring their respective density and *** addition,the change in pellet density was measured after a storage period of one month to determine its dimensional *** was determined that applied pressure and pre-treatment were significant factors affecting the pellet ***,bigger grind sizes and lower applied pressures resulted in higher pellet relaxations(lower pellet densities)during storage of *** pilot scale pellet mill produced pellets from ground non-treated straw at hammer mill screen sizes of 0.8 and 1.6 mm and customized samples having 25%steam exploded straw at 0.8 *** was observed that the pellet bulk density and particle density are positively *** density and durability of agricultural straw pellets significantly increased with decrease in hammer mill screen size from 1.6 mm to 0.8 *** of agricultural straw by adding 25%of steam exploded straw by weigh

关键词： biofuels biomass density durability pelleting specific energy steam explosion pretreatment

遇见野生动物明尼苏达州的野狼保育和市区郊狼的妥善应对

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空中英语教室（高级版．彭蒙惠英语） 2023年第9期 16-18,41,42页

作者： greg Stanle 不详

11关于明尼苏达州狼群的五个关键结论自从美国国会在20世纪70年代首次将野狼列人危物种名单,这种捕食性动物就慢慢回到更广阔的原生栖息地。但只要是狼群数目回升的地方,关于野狼数量、猎捕权与诱捕权,以及狼与人类文明的安全距离的激... 详细信息

11关于明尼苏达州狼群的五个关键结论自从美国国会在20世纪70年代首次将野狼列人危物种名单,这种捕食性动物就慢慢回到更广阔的原生栖息地。但只要是狼群数目回升的地方,关于野狼数量、猎捕权与诱捕权,以及狼与人类文明的安全距离的激辩即随之而来。

关键词：明尼苏达州野生动物美国国会安全距离狼群保育诱捕栖息地