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125篇 您的检索式:作者名="Han GR"
    题名 作者 年代 出处 被引量
1全场彩虹技术测量喷雾浓度及粒径分布显示文摘喷雾颗粒的浓度、粒径等多参数的同时测量是研究喷雾的关键.对应用全场彩虹技术测量双组分液滴的浓度及粒径分布进行了研究.基于改进的Nussenzweig理论,对液滴折射率和粒径分布采用无分布函数算法进行最优化求解,然后通过折射率与浓度的关系反推液滴浓度.用模拟全场彩虹信号对该算法进行了验证,该算法可准确反演具有单峰分布、双峰分布粒径特征的液滴群的折射率与粒径分布.并对体积分数从0%到100%的乙醇溶液喷雾进行了实验测量,结果表明,所测得折射率与理论值符合,粒径分布稳定.该技术在喷雾浓度测量方面具有广阔的应用前景.吴迎春 吴学成 Sawitree Saengkaew 姜淏予 洪巧巧 Gérard Gréhan 岑可法 2013物理学报2013,62,9:9
2一种新螺杆挤压法从6063铝合金和Mg混合颗粒制备Al/Mg复合材料(英文)显示文摘采用一种新的螺杆挤压法以AA6063合金和工业纯Mg混合颗粒为原料制备Al/Mg双金属复合材料。加入铝合金中的镁合量最高可达到12.5%(质量分数)。所制备复合材料由细小晶粒组织组成。其显微组织中除有原料中的物相外,还观察到由γ-Mg17Al12包围的岛状Al2Mg3金属间合物。复合材料的强度随Mg含量的增加逐渐增高。含Mg为10%复合材料的极限抗拉强度最高,超过350 MPa。断裂表面分析结果表明,增加Mg含量导致材料发生较严重的脆性断裂及断裂机制的较小变化。因此,应对挤压工艺条件进行进一步优化。Kristian Gr tta SKORPEN Eirik MAUL Oddvin REISO Hans J rgen ROVEN 2014Transactions of Nonferrous Metals Society of China2014,24,12:4
3数字显微全息中记录参数对颗粒测量影响的数值模拟显示文摘数字显微全息技术由于具有三维、非接触和实时测量微小空间内流场的能力,已引起了国内外学者的广泛关注.利用数字显微全息方法测量微通道流场时,记录距离、颗粒尺寸、颗粒浓度、入射光波长、CCD分辨率等参数会对颗粒重建结果产生重要影响.为了评估颗粒浓度和样本空间深度对重建结果的影响,本文开展了数值模拟研究.采用基于洛伦兹-米散射理论的程序产生不同浓度的颗粒全息图,用小波变换重建算法对其进行重建.结果表明:在样本空间深度为24μm时,颗粒浓度ns在3.44×105mm 3—13.77×105mm 3范围内时,颗粒重建率Ep随着颗粒浓度ns的增大而迅速减小,在13.77×105mm 3—55.08×105mm 3范围内时,颗粒重建率Ep随颗粒浓度ns增大而缓慢减少.在颗粒浓度ns(13.77×105mm 3)保持不变时,颗粒重建率Ep与样本空间深度满足单调递减的线性关系.当阴影密度不变时,重建率的变化呈现一定的规律性:当深度L较小时,样本空间深度对颗粒重建的影响要比颗粒浓度的影响大;当深度L较大时,颗粒浓度对颗粒重建的影响较大.周斌武 吴学成 吴迎春 阳静 Gérard Gréhan 岑可法 2013物理学报2013,62,20:3
4Significance of scintigraphy for the localisation of obscure gastrointestinal bleedings显示文摘AIM: To determine the role of scintigraphy in patients with gastrointestinal (GI) bleeding of unknown localisation. METHODS: We performed retrospective analyses on 92 patients receiving scintigraphies from 1993 to 2000 in the University of Regensburg hospital, which were done for localisation of GI bleeding as a diagnostic step after an unsuccessful endoscopy. In addition to the scintigraphies, further diagnostic steps such as endoscopy, angiography or operations were performed. In some of the scintigraphies with negative results, a provocation test for bleeding with heparinisation was carried out. RESULTS: 73% of all scintigraphies showed a positive result. In 4.5% of the positive results, the source was located in the stomach, in 37% the source was the small bowel, in 25% the source was the right colon, in 4.5% the source was the left colon, and in 20% no clear localisation was possible. Only 4% of all scintigraphies were false positive. A reliablepositive scintigraphy was independent of the age of the examined patient. A provocation test for bleeding with heparin resulted in an additional 46% of positive scintigraphies with a reliable localisation in primary negative scintigraphies. CONCLUSION: Our results show that scintigraphy and scintigraphy with heparin provocation tests are reliable procedures. They enable a reliable localisation in about half of the obscure GI-bleeding cases. Scintigraphy is superior to angiography in locating a bleeding. It is shown that even in the age of video capsule endoscopy and double-balloon enteroscopy, scintigraphy provides a reliable and directed localization of GI bleeding and offers carefully targeted guidance for other procedures.Tanja Brünnler Frank Klebl Sascha Mundorff Christoph Eilles Michael Reng Hans von Korn Jürgen Schlmerich Julia Langgartner Stefan Grüne 2008World Journal of Gastroenterology2008,14,32:3
5Gap filling strategies for long term energy flux data sets显示文摘Eva Falge Dennis Baldocchi Richard Olson Peter Anthoni Marc Aubinet Christian Bernhofer George Burba Reinhart Ceulemans Robert Clement Han Dolman André Granier Patrick Gross Thomas Grünwald David Hollinger Niels-Otto Jensen Gabriel Katul Petri Keronen And 2001Agricultural and Forest Meteorology2001,,1:2
6Self-calibrated global rainbow refractometry:a dual-wavelength approach显示文摘Calibration of the relationship between the scattering angle and the CCD pixel is a key part of achieving accurate measurements of rainbow refractometry.A novel self-calibrated global rainbow refractometry system based on illumination by two lasers of different wavelengths is proposed.The angular calibration and refractive index measurement of two wavelengths can be completed simultaneously without extra measurement devices.The numerical and experimental results show the feasibility and high precision of the self-calibration method,which enables the rainbow refractometry to be implemented in a more powerful and convenient way.The self-calibrated rainbow system is successfully applied to measure the refractive indices of ethanol-water solutions with volume concentrations of 10% to 60%.吴学成 姜淏予 操凯霖 吴迎春 李灿 Gérard Gréhan Sawitree Saengkaew 岑可法 2017Chinese Optics Letters2017,15,4:2
7Cilostazol for secondary stroke prevention:systematic review and meta-analysis显示文摘Background Stroke is one of the leading causes of death worldwide.Cilostazol,an antiplatelet and phosphodiesterase 3 inhibitor,has not been clearly established for ischaemic stroke use.We aim to determine the efficacy and safety of cilostazol for secondary stroke prevention.Methods MEDLINE,EMBASE,Cochrane Library,Web of Science and ClinicalTrials.gov were searched from inception to 25 September 2020,for randomised trials comparing the efficacy and safety of cilostazol monotherapy or dual therapy with another antiplatelet regimen or placebo,in patients with ischaemic stroke.Version 2 of the Cochrane risk-of-bias tool for randomised trials(RoB 2)was used to assess study quality.This meta-analysis was reported in line with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses(PRISMA)statement.Results Eighteen randomised trials comprising 11429 participants were included in this meta-analysis.Most trials possessed low risk of bias and were of low heterogeneity.Cilostazol significantly reduced the rate of ischaemic stroke recurrence(risk ratio,RR=0.69,95%CI 0.58 to 0.81),any stroke recurrence(RR=0.64,95%CI 0.54 to 0.74)and major adverse cardiovascular events(RR=0.67,95%CI 0.56 to 0.81).Cilostazol did not significantly decrease mortality(RR=0.90,95%CI 0.64 to 1.25)or increase the rate of good functional outcome(Modified Rankin Scale score of 0–1;RR=1.07,95%CI 0.95 to 1.19).Cilostazol demonstrated favourable safety profile,significantly reducing the risk of intracranial haemorrhage(RR=0.46,95%CI 0.31 to 0.68)and major haemorrhagic events(RR=0.49,95%CI 0.34 to 0.70).Conclusions Cilostazol demonstrated superior efficacy and safety profiles compared with traditional antiplatelet regimens such as aspirin and clopidogrel for secondary stroke prevention but does not appear to affect functional outcomes.Future randomised trials can be conducted outside East Asia,or compare cilostazol with a wider range of antiplatelet agents.Choon Han Tan Andrew GR Wu Ching-Hui Sia Aloysius ST Leow Bernard PL Chan Vijay Kumar Sharma Leonard LL Yeo Benjamin YQ Tan 2021Stroke & Vascular Neurology2021,6,3:2
8Refractoriness occurs during lung carcinogenesis despite functional retinoid receptors显示文摘Kim YH Dohi DF Han GR et a1 1995Cancer Res1995,55,:1
9A Korean population study of the nine STR loci FGA, vWA, D3S1358, D18S51, D21S11, D8S1179, D7S820, D13S317 and D5S818显示文摘Han GR Lee YW Lee HL et ol 2000Int J Legal Med2000,114,12:1
10Failing hemodi- alysis access grafts: Evaluation of complete vascular tree with 3D Contrast- enhanced MR Angiog raphy with high spatial resolution:Initial results in 10 patients 显示文摘Han KM Duijm LE Thelissen GR 2003Radielogy2003,227,2:1
11Information technology:Efficient restructuring and the productivity puzzle显示文摘Hans Peter Grüner 0,,03:1
12Bank cooperation and banking policy in a monetary union: A political-economy perspective on EMU显示文摘Hans Peter Grüner Carsten Hefeker 1996Open Economies Review1996,,3:1
13Use of an immunoaffinity-mass spectrometry-based approach for the quantification of protein bio-markers from serum samples of lung cancer patients显示文摘Nicol GR Han M Ki MJ 2008Mol Cell Proteomics2008,7,10:1
14A prospective and open-label study for the efficacy and safety of telbivudi- ne in pregnancy for the prevention of perinatal transmis- sion of hepatitis B virus infection 显示文摘Han GR Cao MK Zhao W 2011J Hepatol2011,55,6:1
15A prospective and open-label study for the efficacy and safety of tetbivudine in pregnancy for the preven- tion of perinatal transmission of hepatitis B virus infection显示文摘Han GR Cao MK Zhao W 2011J Hep- atol2011,55,6:1
16The CXCL1 rs4074 A allele is associated with enhanced CXCL1 responses to TLR2 ligands and predisposes to cirrhosis in HCV genotype 1-infected Caucasian patients显示文摘Hans Dieter Nischalke Cordula Berger Carolin Luda Tobias Müller Thomas Berg Martin Coenen Benjamin Kr?mer Christian K?rner Jonel Trebicka Frank Grünhage Frank Lammert Jacob Nattermann Tilman Sauerbruch Ulrich Spengler 2011Journal of Hepatology2011,,4:1
17A prospective and open - label stud- y for the efficacy and safety of telbivudine in pregnancy for the preven- tion of perinatal transmission of hepatitis B virus infection 显示文摘Han GR Cao MK Zhao W 2011J Hep- atol2011,55,6:1
18A prospective and open-label study for the efficacy and safety of telbivudine in pregnancy for the preven- tion of perinatal transmission of hepatitis B virus infection 显示文摘Han GR Cao MK Zhao W 2011JHepatol2011,55,6:1
19Infliximab as Rescue Therapy in Severe to Moderately Severe Ulcerative Colitis: A Randomized, Placebo-Controlled Study显示文摘Gunnar J?rnerot Erik Hertervig Ingalill Friis-Liby Lars Blomquist Per Karlén Christer Gr?nn? Mogens Vilien Magnus Str?m ?ke Danielsson Hans Verbaan Per M. Hellstr?m Anders Magnuson Bengt Curman 2005Gastroenterology2005,,7:1
20A prospective and open -label study for the efficacy and satety of telbivudine in pregnancy for the prevention of perinatal transmission of hepatitis B virus infection 显示文摘Han GR Cao MK Zhao W 2011J Hepatol2011,55,6:1
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