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369篇 您的检索式:作者名="R.L."
    题名 作者 年代 出处 被引量
1超声引导下经皮微波凝固术治疗小乳腺癌的临床研究显示文摘动态增强联合扩散加权乳腺磁共振多参数成像评估活体导管内原位癌级别 摘要目的研究动态增强联合扩散加权MR成像特征用于活体内鉴别高分化和非高分化导管原位癌诊断的模型。材料与方法本研究获得机构审查委员会批准和病人的知情同意,符合HIPAA要求。回顾性分析了52例病人共55个单纯导管原位癌病灶(19例高分化,36例非高分化),H. Rahbar S. C. Partridge W. B. DeMartini R.L. Gutierrez K. H. Allison S. Peacock 秦乃姗 2012国际医学放射学杂志2012,35,4:30
2鸭绿江香鱼耳石日轮与生长的研究显示文摘1992年对鸭绿江香鱼耳石日轮与生长进行了研究。人工受精卵胚胎发育后期和前仔鱼期连续剖察表明,受精后约96小时胚体听囊内出现一对矢耳石,孵出后第2天耳石上出现第一个日轮,之后每天形成一轮。在光镜和扫描电镜下测定了幼、成鱼矢耳石的形态、直径、日轮数及其间距变化。耳石短径(v, μm)与鱼体长(x, mm)呈线性关系, 75尾幼、成鱼的关系式为y=3.28x+248.30。以耳石日轮数推算其产卵孵化期与实地调查结果一致。耳石日轮数(D)可用孵化后日数(N)减1表示。日轮间距有规律性变化,与鱼体生长发育和生态条件密切有关。依据日龄和相关体长体重资料进行了香鱼生长特性研究,用生长方程描绘的生长速度曲线和生长拐点(位于283日龄)等均较客观地反映了其生长特点。解玉浩 李勃 富丽静 R.L.拉特克 王志余 1995动物学报1995,41,2:25
3新型口服肾素抑制剂阿利吉仑对高血压患者有剂量依赖性抗高血压作用及与安慰剂相当的耐受性Gradman A.H. Schmieder R.E. Lins R.L. M.P. Bedigian 刘文秀 2005世界核心医学期刊文摘(心脏病学分册)2005,0,8:23
4棉花黄萎病菌致病类型及其分子指纹分析显示文摘对20个大丽轮枝菌菌株的致病性进行了测定和RAPD指纹扩增,完成了供试菌株致病类群与其RAPD指纹组间的相关性分析。结果表明,根据20个菌株对5个棉花品种的抗感反应及其平均病情指数分为4种不同的致病类群;用10个随机引物对20个菌株进行RAPD-PCR扩增,产生92条DNA带(其中51条为多态带);用计算机进行聚类分析,20个供试菌株聚类为9个RAPD指纹组。相关性分析表明,致病类群与RAPD指纹组无明显相关性;但与部分单引物扩增的RAPD谱型有明显对应关系,如引物OPC-15随机扩增的RAPD谱型,除致病类群VG3的菌株外,其余致病类群均有对应的RAPD指纹谱带;其它引物(OPC-05,OPM-13,OPA-02,OPL-02)也有相似的结果。朱有勇 王云月 Dilbag S.M. Bruce R.L. 1998中国农业科学1998,31,3:15
5NEW DEVELOPMENTS IN WROUGHT 718-TYPE SUPERALLOYS显示文摘Research and development efforts are still very active on 718-type alloys although two major members of this widely used family, 718 and 625, were invented almost a half-century ago.Emphasis in this type of work at ATI Allvac is directed at improving existing alloys and developing new alloys to meet ever-increasing industrial demands.The improvement of existing alloys is exemplified by addition of minor elements P and B in alloy 718.The discovery of the beneficial effect of P and B in wrought alloy 718 led to development of a new, modified alloy, AllvacR 718ERR.A large effort has also been directed at studying the effects of major element modifications in 718-type alloys, and a new alloy, AllvacR 718PlusTM, has been developed.The new alloy has much better high temperature capability, especially thermal stability, approaching the level of Waspaloy but retains excellent processing characteristics, similar to alloy 718.Alloy 718PlusTM should be useful in any 718-type application requiring a higher working temperature.The properties and processing of this alloy are introduced in this paper.R.L. Kennedy 2005Acta Metallurgica Sinica(English Letters)2005,18,1:11
6多民族人群中卵圆孔未闭与缺血性卒中的发生风险显示文摘目的:拟评价北曼哈顿多民族的前瞻性队列中卵圆孔未闭(PFO)引起缺血性卒中的风险。背景:PFO被认为与缺血性卒中风险增加相关,证据主要来自病例对照研究。在普通人群中,实际的PFO相关性卒中风险仍不明确。方法:研究对象为来自北曼哈顿研究(NOMAS)中1100例年龄〉39岁(平均68.7±10.0岁)的无卒中受试者,利用造影剂注射经胸二维超声心动图检查评估基线时的PFO。同时记录房间隔动脉瘤(ASA)。受试者接受每年随访。在校正已知的卒中危险因素后,评价PFO/ASA相关的卒中风险。Di Tullio M.R. Sacco R.L. Sciacca R.R. 韩瑞娟 2007世界核心医学期刊文摘(心脏病学分册)2007,3,7:11
7Mapping Sea Level Rise Behavior in an Estuarine Delta System:A Case Study along the Shanghai Coast显示文摘H.Q. Cheng J.Y. Chen Z.J. Chen R.L. Ruan G.Q. Xu G. Zeng J.R. Zhu Z.J. Dai X.Y. Chen S.H. Gu X.L. Zhang H.M. Wang 2018Engineering2018,4,1:11
8子宫全切术和次全切除术后性功能变化的随机对照研究Kuppermann M. Summitt Jr. R.L. Varner R.E. 高雪莲 2005世界核心医学期刊文摘(妇产科学分册)2005,0,9:9
9A possible Younger Dryas-type event during Asian monsoonal Termination 3显示文摘Seven U-Th dates, 560 δ 18O data and microscopic sequences were measured for sta- lagmites from two high-altitude caves in Shennongjia area, Hubei Province. Variations of the de- cadal-resolution stalagmite δ 18O record from Swan Cave (1600 m elevation) reflect large spatial changes in circulation strength and precipitation of Asian monsoon. The evidence comes from a great similarity among the stalagmite δ 18O records from Nanjing, Jiangsu Province; Libo, Guizhou Province and here studied area during the last deglaciation, including a part interval of Younger-Dryas event and Bolling-Allerod. A 30-year-resolution stalagmite δ 18O record from Yongxing Cave (1400 m eleva- tion), 70 km away from Swan Cave, reveals a rapid transition of Asian monsoon climate during Ter- mination 3 at about 245±5 kaBP. Based on 3 U-Th dates and about 5000 continuous annual bands, a millennial dry episode has been observed during Asian monsoonal Termination 3 from the Yongxing δ 18O profile. With respect to its structure, duration and transition, the dry reversal, as indicated by our stalagmite δ 18O record, generally agrees with the pattern of the YD event well-expressed in the Chi- nese stalagmite δ 18O records. This YD-type event is characterized by a large decrease in δ 18O value as much as 2.30‰, more than half of the δ 18O excursion between glacial/interglacial periods, and lasts 1371±59 a determined by the annual counting chronology. After this event, the monsoon climate shifted abruptly into the interglacial period within 74±4 a. Our data corroborate the view that the re- peated occurrence of YD-type event was not an “accident”, possibly resulted from the coupling of ice-sheet and oceanic/atmospheric circulations.CHEN Shitao1, WANG Yongjin1, KONG Xinggong1, LIU Dianbing1, CHENG Hai2 & R.L. Edwards2 1. College of Geography Science, Nanjing Normal University, Jiangsu Key Laboratory of Environmental Change and Ecological Construction, Nanjing 210097, China 2. Department of Geology and Geophysics, University of Minnesota, Minneapolis MN55455, USA 2006Science China Earth Sciences2006,49,9:7
10高概念:使“后现代”抽象化显示文摘“高概念”这一词语,在广告、新闻和电影业的报纸中反复出现,似乎指出在学术评论界早已经注意到的商品市场范围内,正在发生某种改变。这种改变在某种程度上很可能反映出有关产业性定义的另一重含义——不同的参与人对这一词语和其功能有其自己的解释。史蒂文·斯皮尔勃格可能是近二十年来最有成就的电影制作人,他表达了对高概念的一种看法。他说:“能使我比对任何其它事物都感兴趣的就是观念。如果有人能用25个词,甚至更少的词告诉我那个观念,那将会是一部绝妙的电影。我喜欢观念。贾斯廷.怀亚特 R.L.拉特斯基 刘国选 左舒拉 1990当代电影1990,,6:6
11生物系统的动力分析——发展趋势及研究课题显示文摘本文提出一种生物系统动力分析的计算机方法.虽然生物系统包括所有活的生物体,然而具有兴趣的生物系统是人体,因此本文集中在人体模型及其动力分析上.分析的范围包括碰撞(如车祸)及一般运动(如推-拉或坐-站等).这些分析可应用于工作场所设计(人体工程分析),安全分析(受伤机理及预防),效能的增强(运动与训练)以及复原(假肢设计).本文提出可供这些分析的方法.这种方法以建立控制方程的 Kane 方程为基础.(对生物动力学模型的分析,Kane 方程被认为是最理想的.它兼有拉格朗日及牛顿-欧拉方程二者的优点,而无相应的缺点.)所讨论的方法包括使用物体连接数组,欧拉参数及正交余补数组.最后讨论了尚待解决的问题及研究课题.R.L.休斯顿 刘成群 1990力学与实践1990,12,6:6
12邓恩桉种源变异和遗传保存显示文摘邓恩桉虽然知名度小,且自然分布十分有限,但它作为商业人工林在生长方面具有突出的潜力。结合实生种子园和种源家系道传试验,1995年将在两地建立8公顷的邓恩桉人工林。这些邓恩桉人工林将提供种内遗传变异的第一手材料。邓恩桉重要的遗传参数将从这些人工林中获得,因为这些人工林能够既从种子园叉从与天然林种子有关的遗传改良中得到遗传增益的估计值。这些人工林可望在到6年时开始生产遗传改良过的种子。R.L.阿诺尔德 李天全 1994桉树科技1994,11,2:5
13Selection and breeding of plant cultivars to minimize cadmium accumulation显示文摘C.A. Grant J.M. Clarke S. Duguid R.L. Chaney 2007Science of the Total Environment2007,,2:5
14A constitutive model for anisotropic damage in fiber-composites显示文摘A. Matzenmiller J. Lubliner R.L. Taylor 1995Mechanics of Materials1995,,2:4
15美国海军用基于知识的实时系统进行态势评估显示文摘本文分析了海上态势和威胁评估过程,使用一种被称之为MUSE的基于知识的实时系统提供了某种态势评估子函数执行的数字的结果。文中首先简单介绍了MUSE系统,介绍了MUSE仿真器,这种仿真器如远程雷达,中程雷达,火控雷达和电子支援措施(ESM),敌我识别(IFF)以及数据链传感器产生实时空中航迹。提供了一幅海上态势和威胁评估的功能图,同时提供了这两个过程的最重要的子功能。论述了这些子功能在防空驱逐舰的操纵室里的任务以及如何使用MUSE基于知识的系统来为这些子功能进行电脑建模。论述了统计实验。在统计实验中,用仿真器在SUN SPARC10工作站上产生了三百秒的实时空中航迹数据,通过以太网传送到在SUN SPARC5工作站上运行的MUSE基于知识的态势评估系统。文中也对这个基于知识的系统所产生结果进行了评价。R.L.卡尔林 赵红艳 2000指挥控制与仿真2000,0,7:4
16The organic matter distribution and methane capacity of the Lower Cretaceous strata of Northeastern British Columbia, Canada显示文摘Gareth R.L. Chalmers R. Marc Bustin 2006International Journal of Coal Geology2006,,1:4
17Study on the Sulfur Nutrition of the Sugarcane and Balance of Sulfur in Soil for Sugarcane Planting Areas显示文摘H.W. Tan L.Q. Zhou R.L. Xie M.F. Huang 2010Journal of Environmental Science and Engineering2010,4,9:4
18低脂肪饮食模式与浸润型乳腺癌风险的妇女健康初步随机对照饮食改良试验显示文摘Context: The hypothesis that a low- fat dietary pattern can reduce breast cancer risk has existed for decades but has never been tested in a controlled intervention trial. Objective: To assess the effects of undertaking a low- fat dietary pattern on breast cancer incidence. Design and Setting: A randomized, controlled, primary prevention trial conducted at 40 US clinical centers from 1993 to 2005. Participants: A total of 48 835 postmenopausal women, aged 50 to 79 years, without prior breast cancer, including 18.6% of minority race/ethnicity, were enrolled. Interventions: Women were randomly assigned to the dietary modification intervention group (40% [n = 19 541]) or the comparison group (60% [n = 29 294]). The intervention was designed to promote dietary change with the goals of reducing intake of total fat to 20% of energy and increasing consumption of vegetables and fruit to at least 5 servings daily and grains to at least 6 servings daily. Comparison group participants were not asked to make dietary changes. Main Outcome Measure: Invasive breast cancer incidence. Results: Dietary fat intake was significantly lower in the dietary modification intervention group compared with the comparison group. The difference between groups in change from baseline for percentage of energy from fat varied from 10.7% at year 1 to 8.1% at year 6. Vegetable and fruit consumption was higher in the intervention group by at least 1 serving per day and a smaller, more transient difference was found for grain consumption. The number of women who developed invasive breast cancer (annualized incidence rate) over the 8.1- year average follow- up period was 655 (0.42% ) in the intervention group and 1072 (0.45% ) in the comparison group (hazard ratio, 0.91; 95% confidence interval, 0.83- 1.01 for the comparison between the 2 groups). Secondary analyses suggest a lower hazard ratio among adherent women, provide greater evidence of risk reduction among women having a high- fat diet at baseline, and suggest a dietary effect that varies by hormone receptor characteristics of the tumor. Conclusions: Among postmenopausal women, a low- fat dietary pattern did not result in a statistically significant reduction in invasive breast cancer risk over an 8.1- year average follow- up period. However, the nonsignificant trends observed suggesting reduced risk associated with a low- fat dietary pattern indicate that longer, planned, nonintervention follow- up may yield a more definitive comparison.Prentice R.L. Caan B. Chlebowski R.T. 张旸 2006世界核心医学期刊文摘(妇产科学分册)2006,2,6:4
19Hot pepper ( Capsicum annuum , Tepin and Capsicum chinese , Habanero) prevents Fe 2+ -induced lipid peroxidation in brain – in vitro显示文摘G. Oboh R.L. Puntel J.B.T. Rocha 2006Food Chemistry2006,,1:3
20Startup of reactors for anoxic ammonium oxidation: Experiences from the first full-scale anammox reactor in Rotterdam显示文摘Wouter R.L. van der Star Wiebe R. Abma Dennis Blommers Jan-Willem Mulder Takaaki Tokutomi Marc Strous Cristian Picioreanu Mark C.M. van Loosdrecht 2007Water Research2007,,18:3
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