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| 1 | 不同氮源对海洋微藻氮同位素分馏作用的影响显示文摘以海链藻 (Thalassiosirapseudonana)为研究对象 ,分别考察了以硝酸盐、铵盐和尿素为氮源的氮同位素分馏作用。在建立相应理论模型基础上 ,分别计算出各个实验体系的ε值。结果表明 ,在藻类生长初期 ,δ1 5N均较低 ,其δ1 5N的积累主要发生在指数增长期 ,在稳定期达到最高 ,与氮源的初始δ1 5N相同 ;不同氮源的氮同位素分馏作用也不相同 ,其中以铵盐最强 ,硝酸盐次之 ,尿素最弱。考虑到实际情况下氮化合物并非单一存在 ,作者还进一步考察了上述3种氮源混合后对其同位素分馏作用的影响 ,发现混合氮源体系的表观ε值介于单一氮源时的最大与最小ε值之间 ,该结果较好地解释了Montoya等 ( 1 991 )在Chesapeak湾的现场实验结果。 | 俞志明 Waser N A D Harrison P J | 2004 | 海洋与湖沼2004，35，6： | 13 |
| 2 | Comparison of two remote sensing models for estimating evapotranspiration: algorithm evaluation and application in seasonally arid ecosystems in South Africa显示文摘Remote sensing tools are becoming increasingly important for providing spatial information on water use by different ecosystems. Despite significant advances in remote sensing based evapotranspiration(ET) models in recent years, important information gaps still exist on the accuracy of the models particularly in arid and semi-arid environments. In this study, we evaluated the Penman-Monteith based MOD16 and the modified Priestley-Taylor(PT-JPL) models at the daily time step against three measured ET datasets. We used data from two summer and one winter rainfall sites in South Africa. One site was dominated by native broad leaf and the other by fine leafed deciduous savanna tree species and C4 grasses. The third site was in the winter rainfall Cape region and had shrubby fynbos vegetation. Actual ET was measured using open-path eddy covariance systems at the summer rainfall sites while a surface energy balance system utilizing the large aperture boundary layer scintillometer was used in the Cape. Model performance varied between sites and between years with the worst estimates(R2<0.50 and RMSE>0.80 mm/d) observed during years with prolonged mid-summer dry spells in the summer rainfall areas. Sensitivity tests on MOD16 showed that the leaf area index, surface conductance and radiation budget parameters had the largest effect on simulated ET. MOD16 ET predictions were improved by:(1) reformulating the emissivity expressions in the net radiation equation;(2) incorporating representative surface conductance values;and(3) including a soil moisture stress function in the transpiration sub-model. Implementing these changes increased the accuracy of MOD16 daily ET predictions at all sites. However, similar adjustments to the PT-JPL model yielded minimal improvements. We conclude that the MOD16 ET model has the potential to accurately predict water use in arid environments provided soil water stress and accurate biome-specific parameters are incorporated. | Sebinasi DZIKITI Nebo Z JOVANOVIC Richard DH BUGAN Abel RAMOELO Nobuhle P MAJOZI Alecia NICKLESS Moses A CHO David C LE MAITRE Zanele NTSHIDI Harrison H PIENAAR | 2019 | Journal of Arid Land2019，11，4： | 4 |
| 3 | Chemical associations of lead, cadmium, copper and zinc in street dusts and roadside soils显示文摘 | Harrison R M Laxen D P H Wilson S J | 1981 | Environmental Science and Technology1981，15，11： | 2 |
| 4 | Immunoplatelet counting: a proposed new reference procedure显示文摘 | Harrison P Horton A Grant D | 2000 | Brit J Heamat2000，108，： | 2 |
| 5 | Accurate and generalizable quantitative scoring of liver steatosis from ultrasound images via scalable deep learning显示文摘BACKGROUND Hepatic steatosis is a major cause of chronic liver disease.Two-dimensional(2D)ultrasound is the most widely used non-invasive tool for screening and monitoring,but associated diagnoses are highly subjective.AIM To develop a scalable deep learning(DL)algorithm for quantitative scoring of liver steatosis from 2D ultrasound images.METHODS Using multi-view ultrasound data from 3310 patients,19513 studies,and 228075 images from a retrospective cohort of patients received elastography,we trained a DL algorithm to diagnose steatosis stages(healthy,mild,moderate,or severe)from clinical ultrasound diagnoses.Performance was validated on two multiscanner unblinded and blinded(initially to DL developer)histology-proven cohorts(147 and 112 patients)with histopathology fatty cell percentage diagnoses and a subset with FibroScan diagnoses.We also quantified reliability across scanners and viewpoints.Results were evaluated using Bland-Altman and receiver operating characteristic(ROC)analysis.RESULTS The DL algorithm demonstrated repeatable measurements with a moderate number of images(three for each viewpoint)and high agreement across three premium ultrasound scanners.High diagnostic performance was observed across all viewpoints:Areas under the curve of the ROC to classify mild,moderate,and severe steatosis grades were 0.85,0.91,and 0.93,respectively.The DL algorithm outperformed or performed at least comparably to FibroScan control attenuation parameter(CAP)with statistically significant improvements for all levels on the unblinded histology-proven cohort and for“=severe”steatosis on the blinded histology-proven cohort.CONCLUSION The DL algorithm provides a reliable quantitative steatosis assessment across view and scanners on two multi-scanner cohorts.Diagnostic performance was high with comparable or better performance than the CAP. | Bowen Li Dar-In Tai Ke Yan Yi-Cheng Chen Cheng-Jen Chen Shiu-Feng Huang Tse-Hwa Hsu Wan-Ting Yu Jing Xiao Lu Le Adam P Harrison | 2022 | World Journal of Gastroenterology2022，28，22： | 2 |
| 6 | Impact of 'adverse selection' on managers project evaluation decisions 显示文摘 | HARRISON P D HARREL A | 1993 | Academy of Management Journal1993，36，3： | 1 |
| 7 | Utility of a rapid Brain natriuretic peptide assay in differentiating congestive heart failure from lung disease in patients presenting with dyspnea 显示文摘 | Morrison LK Harrison A Krishnaswamy P | 2002 | J Am Coll Cardiol2002，39，： | 1 |
| 8 | Uptake of urea C and urea N by the coastal marine diatom 显示文摘 | Price N M Harrison P J | 1988 | Limnol Oceanogr1988，33，： | 1 |
| 9 | Glacial-interglacial changes in dust deposition on the Chinese Loess Plateau 显示文摘 | Kohfeld K E Harrison S P | 2003 | Quaternary Science Reviews2003，22，： | 1 |
| 10 | Raising Tibet显示文摘 | Harrison T M Copeland P Kidd W S | 1992 | Science1992，255，： | 1 |
| 11 | Phytoplankton dynamics in the NE subarctic Pacific显示文摘 | BOYD P HARRISON P J | 1999 | Deep-Sea Res1999，46，1112： | 1 |
| 12 | Measur- ing antiplatelet drug effects in the laboratory显示文摘 | Harrison P Frelinger AL 3rd FurmanMI | 2007 | Thromb Res2007，120，3： | 1 |
| 13 | Invasive Pneumococcal Disease in Children 5 Years After Conjugate Vaccine Introduction - Eight States, 1998-2005显示文摘 | Reingold A Hadler J Farley M M Harrison L Lynfield R Lexau C Bennett N Thomas A Craig A S Smith P J Beall B Whitney C G Moore M Pilishvili T | 2008 | MMWR Morbidity and Mortality Weekly Report2008，，6： | 1 |
| 14 | Simultaneous Shift and Carbon Dioxide Separation for the Direct Production of Hydrogen显示文摘 | Han C Harrison D P | | 0，，24： | 1 |
| 15 | Examinalion of Alumina Ceramic Components From Total Hip Arthroplasties显示文摘 | Nevels B A Evans P A Harrison P el al | 1993 | Proceedings af the Institution (f Mevhanieal Engineers1993，207，： | 1 |
| 16 | DIRTMAP: the geological re- cord of dust 显示文摘 | Kohfeld K E Harrison S P | 2001 | Earth-Science Reviews2001，54，1： | 1 |
| 17 | The challenge of closed-loop supply chain 显示文摘 | Guide V D R Harrison T P Wassenhove L N V | 2003 | Interface2003，33，6： | 1 |
| 18 | Global Supply Chain Management at Digital Equipment Corporation显示文摘 | Amtzen B C Brown G G Harrison T P Trafton L | 1995 | Interfaces1995，25，1： | 1 |
| 19 | B-type natriuretic peptide(BNP)predicts future cardiac events in patients presenting to the emergency department with dypnea 显示文摘 | Harrison A Murrison LK Krishnaswamy P | 2002 | Ann of Emerg Meal2002，39，： | 1 |
| 20 | The role of dissolved organic nitrogen in phytoplankton nutrition, cell biology, and ecology 显示文摘 | Antia N J Harrison P J Oliveira L | 1991 | Phycologia1991，30，： | 1 |
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