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17篇 您的检索式:作者名="David Ritchie"
    题名 作者 年代 出处 被引量
1Portal hypertension: Imaging of portosystemic collateral pathways and associated image-guided therapy显示文摘Portal hypertension is a common clinical syndrome, defined by a pathologic increase in the portal venous pressure. Increased resistance to portal blood flow, the primary factor in the pathophysiology of portal hypertension, is in part due to morphological changes occurring in chronic liver diseases. This results in rerouting of blood flow away from the liver through collateral pathways to low-pressure systemic veins. Through a variety of computed tomographic, sonographic, magnetic resonance imaging and angiographic examples, this article discusses the appearances and prevalence of both common and less common portosystemic collateral channels in the thorax and abdomen. A brief overview of established interventional radiologic techniques for treatment of portal hypertension will also be provided. Awareness of the various imaging manifestations of portal hypertension can be helpful for assessing overall prognosis and planning proper management.Murad Feroz Bandali Anirudh Mirakhur Edward Wolfgang Lee Mollie Clarke Ferris David James Sadler Robin Ritchie Gray Jason Kam Wong 2017World Journal of Gastroenterology2017,23,10:14
2“Nixon Stonewalled the Investigation”: Potential Contributions of Grammatical Metaphor to Conceptual Metaphor Theory and Analysis显示文摘L. David Ritchie Min Zhu 2015Metaphor and Symbol2015,,:1
3Effect of IL28B Genotype on Early Viral Kinetics During Interferon-Free Treatment of Patients With Chronic Hepatitis C显示文摘Tom W. Chu Rohit Kulkarni Edward J. Gane Stuart K. Roberts Catherine Stedman Peter W. Angus Brett Ritchie Xiao-Yu Lu David Ipe Uri Lopatin Soren Germer Victor A. Iglesias Robert Elston Patrick F. Smith Nancy S. Shulman 2012Gastroenterology2012,,4:1
4Oral combination therapy with a nucleoside polymerase inhibitor (RG7128) and danoprevir for chronic hepatitis C genotype 1 infection (INFORM-1): a randomised, double-blind, placebo-controlled, dose-escalation trial显示文摘Edward J Gane Stuart K Roberts Catherine AM Stedman Peter W Angus Brett Ritchie Rob Elston David Ipe Peter N Morcos Linda Baher Isabel Najera Tom Chu Uri Lopatin M Michelle Berrey William Bradford Mark Laughlin Nancy S Shulman Patrick F Smith 2010The Lancet2010,,9751:1
5Friction stir blind riveting:a novel joining process for automotive light alloys显示文摘Lathabai Sri Tyagi Vinay Ritchie David 2011SAE Int J Mater Manuf2011,4,1:1
6Frame-Shifting in Humor and Irony显示文摘 2005Metaphor and Symbol2005,,20:1
7A Phase 1 study of the safety, pharmacokinetics and anti-leukemic activity of the anti-CD123 monoclonal antibody CSL360 in relapsed, refractory or high-risk acute myeloid leukemia显示文摘Simon Z. He Samantha Busfield David S. Ritchie Mark S. Hertzberg Simon Durrant Ian D. Lewis Paula Marlton Andrew J. McLachlan Ian Kerridge Kenneth F. Bradstock Glen Kennedy Andrew W. Boyd Trina M. Yeadon Angel F. Lopez Hayley S. Ramshaw Harry Iland Simone 2015Leukemia & Lymphoma2015,,:1
8Mild cognitive impairment显示文摘Serge Gauthier Barry Reisberg Michael Zaudig Ronald C Petersen Karen Ritchie Karl Broich Sylvie Belleville Henry Brodaty David Bennett Howard Chertkow Jeffrey L Cummings Mony de Leon Howard Feldman Mary Ganguli Harald Hampel Philip Scheltens Mary C Tierne 2006The Lancet . 2006 (9518)2006,,:1
9Mild cognitive impairment显示文摘Serge Gauthier Barry Reisberg Michael Zaudig Ronald C Petersen Karen Ritchie Karl Broich Sylvie Belleville Henry Brodaty David Bennett Howard Chertkow Jeffrey L Cummings Mony de Leon Howard Feldman Mary Ganguli Harald Hampel Philip Scheltens Mary C Tierne 2006The Lancet2006,,9518:1
10Externally reinforced of concrete beams using fiber reinforced plates 显示文摘Philip A Ritchie David Thomas Lc Wu and Guy M Connelly 1991ACI Structural Journal1991,1991,:1
11Lack of Diagnostic Accuracy of the Monoclonal Stool Antigen Test for Detection of Helicobacter pylori Infection in Young Australian Aboriginal Children显示文摘Brett Ritchie David Brewster Cuong D. Tran Yvette McNeil Betty Zacharakis Geoffrey P. Davidson Ross N. Butler 2009The Pediatric Infectious Disease Journal2009,,4:1
12Takutsubo Cardiomyopathy and Flash Pulmonary Edema in a Trauma Patient显示文摘Brian Adkins J. David Ritchie Brian Adkins Joe Bryant Terren Trott Seth Stearley 2013Journal of Emergency Medicine2013,,:1
13Mild cognitive impairment显示文摘Serge Gauthier Barry Reisberg Michael Zaudig Ronald C Petersen Karen Ritchie Karl Broich Sylvie Belleville Henry Brodaty David Bennett Howard Chertkow Jeffrey L Cummings Mony de Leon Howard Feldman Mary Ganguli Harald Hampel Philip Scheltens Mary C Tierne 20062006 (9518)2006,,9518:1
14Are the immuno-stimulatory properties of Lenalidomide extinguished by co-administration of Dexamethasone?显示文摘Andy Hsu David S. Ritchie Paul Neeson 2012OncoImmunology2012,,:1
15有关花旗松高生长率的模型比较显示文摘本文提出了生长在俄勒冈州西南的同龄或异龄花旗松单株高生长率进行预报的五个模型,并对各自性能作出评价。其中三个模型已在花旗松中用过,第四个经过简单修改,而第五个是这次研究中通过多维曲线图和模拟的方法来发展的。有二个模型由年龄决定,另外三个与年龄无关。模型的发展使用了多维技术,它提供了同龄数据(1763个观测数)和同龄与异龄数据结合(2242个观测数)之间的最小均方差,并用241个观测数据组成的随机子集来验证五个模型。此外,这些用多维技术发展的模型仍有最小平均剩余差和最小均方差,模型的自变量是林冠郁闭和树冠比例。用优势木高生长方程作为预报潜在的高生长率,得出的模型与年龄无关,并能应用于同龄林和异龄林。这项多维技术最适用于复杂的曲面模型。DAVID W. HANN MARTIN W. RITCHIE 文彦 赵嗣胜 1990中南林业调查规划1990,,3:0
16Continuous-wave laser operation of a dipole antenna terahertz microresonator显示文摘Resonators and the way they couple to external radiation rely on very different concepts if one considers devices belonging to the photonic and electronic worlds.The terahertz frequency range,however,provides intriguing possibilities for the development of hybrid technologies that merge ideas from both fields in novel functional designs.In this paper,we show that high-quality,subwavelength,whispering-gallery lasers can be combined to form a linear dipole antenna,which creates a very efficient,lowthreshold laser emission in a collimated beam pattern.For this purpose,we employ a terahertz quantum-cascade active region patterned into two 19-μm-radius microdisks coupled by a suspended metallic bridge,which simultaneously acts as an inductive antenna and produces the dipole symmetry of the lasing mode.Continuous-wave vertical emission is demonstrated at approximately 3.5 THz in a very regular,low-divergence(±10°)beam,with a high slope efficiency of at least 160 mWA^(−1) and a mere 6 mA of threshold current,which is ensured by the ultra-small resonator size(VRES/λ^(3)≈10^(−2)).The extremely low power consumption and the superior beam brightness make this concept very promising for the development of miniaturized and portable THz sources to be used in the field for imaging and sensing applications as well as for exploring novel optomechanical intracavity effects.Luca Masini Alessandro Pitanti Lorenzo Baldacci Miriam S Vitiello Riccardo Degl’Innocenti Harvey E Beere David A Ritchie Alessandro Tredicucci 2017Light(Science & Applications)2017,6,1:0
17Highly efficient surface-emitting semiconductor lasers exploiting quasi-crystalline distributed feedback photonic patterns显示文摘Quasi-crystal distributed feedback lasers do not require any form of mirror cavity to amplify and extract radiation.Once implemented on the top surface of a semiconductor laser,a quasi-crystal pattern can be used to tune both the radiation feedback and the extraction of highly radiative and high-quality-factor optical modes that do not have a defined symmetric or anti-symmetric nature.Therefore,this methodology offers the possibility to achieve efficient emission,combined with tailored spectra and controlled beam divergence.Here,we apply this concept to a onedimensional quantum cascade wire laser.By lithographically patterning a series of air slits with different widths,following the Octonacci sequence,on the top metal layer of a double-metal quantum cascade laser operating at THz frequencies,we can vary the emission from single-frequency-mode to multimode over a 530-GHz bandwidth,achieving a maximum peak optical power of 240mW(190 mW)in multimode(single-frequency-mode)lasers,with record slope efficiencies for multimode surface-emitting disordered THz lasers up to ≈570 mW/A at 78 K and ≈720 mW/A at 20 K and wall-plug efficiencies of η≈1%.Simone Biasco Andrea Ciavatti Lianhe Li AGiles Davies Edmund H.Linfield Harvey Beere David Ritchie Miriam S.Vitiello 2020Light(Science & Applications)2020,9,1:0
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