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410篇 您的检索式:作者名="G.M."
    题名 作者 年代 出处 被引量
1红细胞分布宽度作为心力衰竭预后的新标记物:来自CHARM计划和Duke数据库的资料显示文摘目的:确定慢性心力衰竭患者风险的可能的新实验室标记物。背景:尽管已有多种心力衰竭预后指标被提出,但对常规实验室检查价值的系统评价尚未见报道。Felker G.M. Allen L.A. Pocock S.J. 孙凯 2007世界核心医学期刊文摘(心脏病学分册)2007,,10:28
2演化经济学的诸多含义显示文摘本文首先采用三个标准对演化经济学和演化经济学家做了划分:1.本体论标准:是否接纳新事象;2.方法论标准:接受还是反对还原论;3.隐喻标准:是否广泛地使用生物学隐喻。在此标准基础上作者提出了NEAR(意为:接纳新事象并反还原论的)演化经济学才是真正的演化经济学。在批评还原论的局限的基础上,本文引入了突现和新事象的概念,并对新事象与内生性、新事象与数学形式化、新事象与突现的关系作了讨论。凭藉突现的概念,本文力图对自由意志论与决定论的古老两难给出解答。本文还指出,新事象的引入和对还原论的抛弃都必须倚赖突现的概念,突现是社会经济系统演化过程的中心特征。最后对NEAR演化经济学的先驱凡勃伦、康芒斯、霍布森、米契尔和凯恩斯分别作出简要的评论。G.M.霍奇逊 洪福海 2004政治经济学评论2004,,2:12
3IN SITU OBSERVATION OF GROWTH BEHAVIOR AND MORPHOLOGY OF DELTA-FERRITE AS FUNCTION OF SOLIDIFICATION RATE IN AN AISI304 STAINLESS STEEL显示文摘It was presented the in situ observation of growth behavior and morphology of delta-ferrite as a function of solidification rate in an AISI304 stainless steel. The specimens have been solidified and observed using confocal scanning laser microscopy (CSLM). The δ-phase always appears like cells on the sample surface when critical supercooling occurs, during which the L→δ transformation starts. The solid-liquid (S-L) interface is found to be finger shaped and has no faceted shape. γ phase appears among δ grains due to partitioning of Ni into the melt during solidification, when solidification rate is higher. The mergence of observed δ cells is possible for the steel sample cooled at 7.5℃/min. The formation of dendrites can be observed on the free surface of the steel sample cooled at 150℃/min. The size of solidified delta grains decreases from 120 to 20-80μm, and the volume fraction of solidified austenite increases with increase in solidification rate from 7.5 to 150℃/min. The relation between the tip radius of δ cell and its growth rate is deduced, and the results agree with the experimental values.G.F. Liang1,2)*, C.Q. Wan1), J.C. Wu1), G.M. Zhu1), Y. Yu1), and Y. Fang1) 1) Advanced Technology Institute, Technology Center of Baosteel, Shanghai 201900, China 2) Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China 2006Acta Metallurgica Sinica(English Letters)2006,19,6:11
4REHEATING TEMPERATURE CONTRAST AND MICROSTRUCTURES OF 7075 Al ALLOY CAST BY LIQUIDUS SEMI-CONTINUOUS CASTING显示文摘In this study, reheating of liquidus semi-continuous east billets of 7075 Al alloy wascarried out in a resistance furnace, and the temperature contrast of the outer andthe center of the reheated billets was investigated, then the reheating microstructureswere investigated. Results show that: the difference of temperature between the outerand center is small and the difference of their microstructures are also small. Dur-ing reheating at 576° C the spheroidization of grains is significant after 5rain and norosettes are visible after 20min by optical microscopy. Similar observations were madeon materials reheated at 596° C, but the ripening process is faster. The grains growup to 30-60pm, fine enough for thixoforming.J. Dong, G.M. Lu and J.Z. CuiThe Key Lab. of Electromagnetic Processing of Material, Ministry of Education, Northeastern University, Shenvane 110004, China 2002Acta Metallurgica Sinica(English Letters)2002,15,6:9
5SCOUR MITIGATION AT BRIDGE PIERS USING SACRIFICIAL PILES显示文摘To mitigate scour around bridge piers, sacrificial piles are economic method where natural processes are involved. The arrangement should be such that scoured materials from the sacrificial piles should have enough volume to fill the scour hole created upstream of the pier in such a way that sediments are trapped inside the scour hole. This concept differs from earlier study made with sacrificial piles that mainly deals to reduce the strength of horseshoe vortex. To determine the effect of sacrificial piles for scour mitigation, alternative arrangements of piles were tested in front of a rectangular pier under clear-water condition and found that when the group of piles is placed at a distance of twice the projected width of the pier, for which percentage of blockage of the pier width is 60%, the scour volume can be reduced upto 61% while the maximum scour depth can be reduced upto 50%.M. Anisul HAQUE Md. Munsur RAHMAN G.M. Tarekul ISLAM M. Asad HUSSAIN 2007International Journal of Sediment Research2007,22,1:7
6Effect of Y Addition on Microstructure and Mechanical Properties of Friction Stir Welded ZK60 Alloy显示文摘6 mm thick ZK60 and ZK60-Y alloy plates were successfully friction stir welded (FSW) at a tool rotation rate of 1200 r/min and a traverse speed of 100 mm/min. FSW resulted in the dissolution of MgZn2 particles in the ZK60 and the breakup and dispersion of W-phase (Mg3Zn3Y2) particles in the ZK60-Y alloy, thereby leading to a decrease in the hardness of the nugget zone (NZ) for the ZK60 alloy and an increase in the hardness of the NZ for the ZK60-Y alloy, respectively. While two FSW joints exhibited similar joint effciency (87%-89% of ultimate tensile strengths of the parent materials), the yield strength of the FSW ZK60-Y joint was substantially higher than that of the FSW ZK60 joint. The fracture occurred in the NZ and the heat affected zone for the ZK60 and ZK60-Y joints, respectively, which were consistent with the lowest hardness distribution of the welded joints.G.M. Xie Z.Y. Ma L. Geng 2009Journal of Materials Science & Technology2009,25,3:7
7Percutaneous coronary intervention in nonagenarians: pros and cons显示文摘Percutaneous coronary intervention is a mainstay in the management of symptomatic or high-risk coronary artery disease. The bulk of clinical evidence and experience underlying this fact relies, however, on relatively young patients. Indeed, few data of very limited quality are available which adequately define the risk-benefit and cost-benefit profile of coronary angioplasty and stenting in very old subjects, such as those of 90 years of age or older (i.e., nonagenarians). The aim of this review is to provide a concise, yet practical, synthesis of the available evidence on percutaneous coronary revascularization in the very elderly. The main arguments elaborated upon are to what extent we can extrapolate findings from studies including younger patients to nonagenarians, whether we should provide higher priority to prognosis or quality of life in such patients, and whether we can afford to allocate vast resources to care for such subjects in an era of financial constraints. Our review of 18 studies and 1082 patients suggest that percutaneous coronary intervention is feasible and associated with acceptable short- and long-term results in this population, which is nonetheless fraught with a high mortality risk irrespective of the revascularization procedure. Accordingly, the pros and cons of percutaneous coronary intervention should be carefully weighed when considering this treatment in nonagenarians.Giuseppe Biondi Zoccai Antonio Abbate Fabrizio D'Ascenzo Davide Presutti Mariangela Peruzzi Elena Cavarretta Antonino G.M. Marullo Marzia Lotrionte Giacomo Frati 2013Journal of Geriatric Cardiology2013,10,1:6
8新西兰苹果品种及砧木育种成就与对中国的启示显示文摘20世纪60年代新西兰的Don Mc Kenzie博士从果农J.H.Kidd配置的杂交后代中选出了世界级的苹果品种‘嘎拉’。随后,新西兰植物与食品研究所于80年代初期开始了持续专业的苹果育种研究,先后培育出了一系列优良的世界性品种。苹果育种技术也从常规育种进入了分子育种时代,一跃成为世界苹果育种强国,吸引了世界众多果树科研单位和育种者争相学习其先进技术和科研成果。为了进一步提升中国苹果育种水平,缩小与苹果育种强国的差距,作者系统的介绍了新西兰的苹果品种和砧木选育的发展历程、选育方法,特别是生物技术在新品种选育中的应用,并对比分析目前中国苹果品种及砧木选育的方法,提出中国苹果育种方法的改进建议,希望对中国的苹果育种工作有所启发。张恒涛 BUS Vincent G.M. WHITE Allan G. 阎振立 过国南 张瑞萍 刘珍珍 YAO Jia-long CHAGNE David 2016果树学报2016,33,4:5
9Numerical modeling of friction stir welding using the tools with polygonal pins显示文摘Friction stir welding using the tools with polygonal pins is often found to improve the mechanical strength of weld joint in comparison to the tools with circular pins. However, the impacts of pin profile on the peak temperature, tool torque and traverse force, and the resultant mechanical stresses experienced by the tool have been rarely reported in a systematic manner. An estimation of the rate of heat generation for the tools with polygonal pins is challenging due to their non-axisymmetric cross-section about the tool axis. A novel methodology is presented to analytically estimate the rate of heat generation for the tools with polygonal pins. A three-dimensional heat transfer analysis of friction stir welding is carried out using finite element method. The computed temperature field from the heat transfer model is used to estimate the torque, traverse force and the mechanical stresses experienced by regular triangular, square, pentagon and hexagon pins following the principles of solid mechanics. The computed results show that the peak temperature experienced by the tool pin increases with the number of pin sides. However, the resultant maximum shear stress experienced by the pin reduces from the triangular to hexagonal pins.M. MEHTA G.M. REDDY A.V. RAO A. DE 2015Defence Technology(防务技术)2015,11,3:5
10Effect of Rotation Rate on Microstructures and Mechanical Properties of FSW Mg-Zn-Y-Zr Alloy Joints显示文摘Friction stir welding (FSW) of Mg-Zn-Y-Zr plates with 6 mm in thickness was successfully carried out under a wide range of rotation rates of 600-1200 r/min with a constant traverse speed of 100 mm/min. After FSW, the coarse grains in the parent material (PM) were changed into fine equiaxed recrystallized grains at the nugget zone (NZ). Furthermore, the coarse Mg-Zn-Y particles (W-phase) were broken up and dispersed homogenously into the Mg matrix. With increasing rotation rates, the size of the W-phase particles at the NZ significantly decreased, but the recrystallized grain size tended to increase. The hardness values of the NZs for all the FSW joints were higher than those of the PM, and the lowest hardness values were detected in the heat affected zone (HAZ). The fracture occurred in the thermo-mechanical affected zone (TMAZ) on the advancing side for all the FSW joints in the tensile test, due to the incompatibility of the plastic deformation between the NZ and TMAZ caused by remarkably different orientation of grains and W-phase particles. The strength of FSW joint reaches 90% of that of its PM.G.M. Xie Z.Y. Ma Z.A. Luo P. Xue G.D. Wang 2011Journal of Materials Science & Technology2011,27,12:4
11论影片中的叙事人和叙事方式显示文摘论影片中的叙事人和叙事方式〔美国〕G.M.威尔逊叶周译要想消除从电影的视点理论出发去研讨《陌生女人的来信》(又译《巫山云》,以下简称《信》)的兴趣,最有把握的方法就是试图以“主观”和“客观”相对立的观点或任何一种简单的类似观点来描述这部影片是如何设...G.M.威尔逊 叶周 1997世界电影1997,0,2:4
12高碱值硫化烷基酚钙盐摩擦膜的XANES研究显示文摘本文利用碳的K-边、钙的L-边和硫的K-边和L-边X射线吸收精细结构光谱(XANES)系统研究了高碱值烷基酚盐润滑下摩擦膜的表面化学结构。摩擦学实验在高频摩擦磨损试验机上进行,结果表明,高碱值烷基酚盐具有一定的抗磨性能,其原因在于摩擦导致清净剂胶体结构被破坏,释放的碳酸钙纳米颗粒沉积在表面上形成摩擦膜,从而降低了材料的接触,起到抗磨作用。万勇 M. Kasrai G.M. Bancroft 2009真空科学与技术学报2009,29,1:4
13Atorvastatin Reduces the Ability of Clopidogrel to Inhibit Platelet Aggregation: A New Drug–Drug Interaction显示文摘Wei C. Lau Lucy A. Waskell Paul B. Watkins Charlene J. Neer Kevin Horowitz Amy S. Hopp Alan R. Tait David G.M. Carville Kirk E. Guyer Eric R. Bates 2003Circulation: Journal of the American Heart Association2003,,1:3
14奇异摄动初值问题的一致收敛有限差分法显示文摘通过一阶和二阶导数讨论了带小参数的线性二阶常微分方程的初值问题·在均匀网格上得出了带常数拟合因子的指数型拟合差分格式,给出了离散最大模意义上的一阶一致收敛性·文中给出了数值结果·G.M.艾米雷利耶弗 哈基杜柔 1999应用数学和力学1999,20,4:3
15MICROSTRUCTURE AND PROPERTIES OF ZL201 ALLOY OBTAINED BY NEAR-LIQUIDUS ELECTROMAGNETIC CASTING显示文摘The microstructures of 7L201 alloy slurry prepared by near-liquidus electromagnetic casting (NLEMC), electromagnetic casting(EMC), and near-liquidus casting(NLC) were investigated by means of electron microscopy and image analysis. Mechanical properties of as-cast alloys were determined. The results show that the NLEMC induces a fine, uniform, and equiaxed grain struc- ture with a mean equal-area-circle grain diameter of 32.8μm. The as-cast alloy has a hardness of HV122.8 and a tensile strength of 368MPa. Both of them are better than those of the alloys pre- pared by EMC and by NLC. The mechanism of grain refinement in the NLEMC alloy slurry was discussed.P. Wang L.F. Shi G.M. Lu J.Z. Cui 2005Acta Metallurgica Sinica(English Letters)2005,18,5:3
16The ALPPS procedure for hepatocellular carcinoma显示文摘G. Vennarecci A. Laurenzi G.B. Levi Sandri E. Busi Rizzi M. Cristofaro M. Montalbano P. Piselli A. Andreoli G. D’Offizi G.M. Ettorre 2014European Journal of Surgical Oncology2014,,:3
17十九世纪的克什米尔与中亚显示文摘G.M.米尔 陆水林 2002南亚研究季刊2002,,4:2
18Effect of porcine circovirus infection on porcine alveolar macrophage function显示文摘F. McNeilly G.M. Allan J.C. Foster B.M. Adair M.S. McNulty 1996Veterinary Immunology and Immunopathology1996,,4:2
19胶囊内镜与常规上消化道内镜检查诊断食管静脉曲张准确性的比较:一项前瞻性、3中心先导性研究显示文摘Background and study aims: Variceal bleeding is a major complication of cirrhosis, and is associated with a 20% mortality at 6 weeks. Current international guidelines recommend that patients with cirrhosis are screened by conventional upper endoscopy (esophagogastroduodenoscopy, EGD) in order to detect esophageal varices. The recently developed PillCam ESO esophageal capsule endoscope has been shown to be an accurate diagnostic tool in the investigation of patients with gastroesophageal reflux and Barrett’ s esophagus. We compared the PillCam ESO capsule endoscope with EGD for the detection of esophagogastric varices and portal hypertensive gastropathy in patients with cirrhosis. Patients and methods: A pilot trial was conducted at three sites. Patients with cirrhosis who were undergoing clinically indicated EGD for screening or surveillance for esophageal varices underwent a PillCam ESO study followed by an EGD within 48 hours. Capsule videos were assessed by an investigator who was blinded to the patient’ s medical history and EGD findings. Results: A total of 23 of the 32 enrolled patients were found to have esophageal varices at both EGD and PillCam ESO endoscopy. In one patient PillCam ESO detected small varices that were not seen at EGD. The overall concordance between PillCam ESO and EGD was 96.9 % for the diagnosis of esophageal varices and 90.6% for the diagnosis of portal hypertensive gastropathy. There were no adverse events related to PillCam ESO endoscopy. Conclusions: In a high-prevalence population, PillCam ESO may represent an accurate noninvasive alternative to EGD for the detection of esophageal varices and portal hypertensive gastropathy. A large-scale trial is underway to validate and expand these findings.Eisen G.M. Eliakim R. Zaman A. 纪泛扑 2006世界核心医学期刊文摘(胃肠病学分册)2006,2,5:2
20Texture evolution of five wrought magnesium alloys during route A equal channel angular extrusion: Experiments and simulations显示文摘S.R. Agnew P. Mehrotra T.M. Lillo G.M. Stoica P.K. Liaw 2005Acta Materialia2005,,11:2
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