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225篇 您的检索式:作者名="D.E."
    题名 作者 年代 出处 被引量
1^(137)Cs法测算黄土高原土壤侵蚀速率的初步研究显示文摘核尘埃^(137)Cs降落到地表后,被土壤胶粒强烈吸附,集中分布于0—25cm的土壤表层。土壤剖面的^(137)Cs总量随土壤的流失而减少。根据黄土农耕地和非农耕地土壤的^(137)Cs流失模式,推导了它们的流失量和侵蚀速率的相关公式。根据陕西洛川黑木沟和山西离石羊道沟的13个土壤剖面的^(137)Cs含量测试结果,求得的黑木沟草坡覆盖的老谷坡和新谷坡的侵蚀速率分别为1400 t/km^2·a和5700t/km^2·a;羊道沟梁峁坡农耕地的侵蚀速率为3270—6030 t/km^2·a;裸露新谷坡的侵蚀速率大于8000 t/km^2·a。张信宝 D.L.赫吉特 D.E.沃林 1991地球化学1991,20,3:50
2关于南雄盆地K/T界线地层序列的几个问题显示文摘中国南部南雄盆地含K/T界线的陆相沉积是很宝贵的地史资料。因为迄今为止,除北美西部以外,含K/T界线的陆相露头研究得很少,赵资奎等(1991)提供了有关南雄盆地K/T界线的丰富资料。我们尝试着对其中一些资料作不同的解释,以鼓励在南雄工作的同行。南雄地层的年代测定对研究该地的K/T界线至关重要。园圃组上段所含喷发玄武岩的平均年龄为67.4ma(赵资奎等,1991),属于晚Maestrichtian期,大约与31正向磁极性带的顶部同时。如果31N带在该地全部保存的话,园圃组上段的沉积速率将为70m/ma(见表Ⅰ)。上覆坪岭组厚约161m,赵资奎等(1991)认为其下段33m所含的正向磁极性带是30N,如果该带在这里全部保存,这一段的沉积速率将是19.3m/ma,这和加拿大西部含K/T界线地层的沉积速率接近。赵资奎等(1991)认为坪岭组上段微量元素富集带的底界在K/T界线下120m处。D.A.拉塞尔 D.E.拉塞尔 A.R.斯威特 胡耀明 1993古脊椎动物学报1993,31,2:10
3保守疗法治疗先天性气管狭窄的效果:一项循证长期随访研究显示文摘Background/Purpose:Surgery has been the management of choice for severe congenital tracheal stenosis (CTS). The role of conservative management of CTS however is not clear. The aim of this study is to characterize the natural history of CTS,review the radiologic evidence of tracheal growth,and evaluate the clinical outcome and selection criteria of conservative management of CTS. Methods:A retrospective study was carried out on 22 consecutive children with symptomatic CTS admitted into a single institution between 1982 and 2001. The patients were categorized into operation (n = 11) and observation(n = 11) groups. Six patients of the observation group were followed up with serial computed tomography scan. Their tracheal growth was compared with that of healthy children of the same age. Results:The mortality rates of observation and operation groups were 9%and 27%,respectively,although the latter group consisted of more severely affected patients. The pathologic categorization of the CTS influenced the survival rates (P = 0.046,χ2),with the long segment type having the worst prognosis (67%). Serial computed tomography scans of 6 conservatively managed patients revealed that all stenotic tracheas continued to grow (P = .039,2-tailed paired Student’s t test). Of the 6 stenotic tracheas,5 grew at a faster-than normalrate,and the stenotic tracheal diameters approached those of normal diameters by the age of 9 years. Conclusions:The management of patients with symptomatic CTS should be individualized. A selected group of patients with CTS can be safely managed nonoperatively.Manson D.E. Forte V. P.C.W. Kim 刘凯 2006世界核心医学期刊文摘(儿科学分册)2006,0,12:5
4对存在治疗选择偏倚的观察性研究的分析:采用倾向评分和工具变量法评价有创性心脏治疗对AMI患者生存率的影响显示文摘背景:在观察性研究中,对治疗组和非治疗组间结果的比较可能会因组间患者预后的差异而产生偏倚,常见的原因是未发现的治疗选择偏倚。目的:比较4种分析方法排除观察性研究中选择偏倚的效果:多因素模型风险校正、倾向评分风险校正、倾向评分匹配法和工具变量法。设计、地点和患者:此项全国性队列研究纳入1994—1995年间122124例享有医疗保险的老年急性心肌梗死(AMI)住院患者(65~84岁),所有病例均适合行心导管术。基线资料来自心血管合作项目,并与医疗保险管理数据连接,以确保足够充分的预后参数。Stukel T.A. Fisher E.S. Wennberg D.E. 黄浙勇 2007世界核心医学期刊文摘(心脏病学分册)2007,3,7:4
5正确理解和应用API653标准显示文摘石油的不断开发使储罐的应用迅速增长,随着时间的推移,由于罐的脆性破坏而产生的泄漏已成为一个严峻的问题。1991年1月出版的API653标准《罐的检测、修补、更换与整治》为地上常压储罐提供了预防性维修和检测技术要求,利用它对罐顶、罐壁、罐底及罐基础等进行检测与评估,能够及时地了解储罐的结构完整性及运行状况,有效地防止因脆性破坏而突发事故,避免环境污染和不良社会影响。检测结果往往是不符合要求的,API653对此有它的灵活性,认为有些条件经过进一步的技术分析是可以接受的。罐壁是易发生事故的地方,有5种技术分析方法可供选择。Hendrix D.E. Carucci V.A. 张文伟 1996油气储运1996,15,2:4
6重金属氧化物玻璃——第一部分 制备与性质显示文摘重金属氧化物玻璃是近年发展起来的一类新型玻璃。所谓重金属氧化物,主要指的是氧化铋、氧化铅以及其他在元素周期表中的第五、六周期中具有高原子量的金属氧化物。它们在玻璃组成中的含量一般都超过50%,所以将此类玻璃称作为重金属氧化物(HMO)玻璃。与普通的玻璃相比,最大差异之处在于它们不含有传统观念的玻璃网络形成氧化物,例如SiO2,P2O5,B2O3和GeO2黄文旵 C.S.雷 D.E.戴 1993玻璃与搪瓷1993,21,4:3
7我者自述之———巴赫金视角观照下的叙事身份显示文摘本文标题借用德里达的著作《他者之耳》(第13页),其含混性并非偶然。因为'我'(I)作为受话者和作为述行叙述者的主体—客体,确切地说,这是一个有关叙事身份(narrative identity)的探讨。D.E.维康 王静 2010叙事(中国版)2010,,1:3
8斯密斯兰奇矿的地浸采铀技术显示文摘原地溶浸采铀是美国80年代出现的一种采铀技术。本文介绍了美国怀俄明州斯密斯兰奇矿的地浸采铀技术,包括矿床地质、半工业试验、工业生产的井场布置、注液井和抽液井的构筑、港浸液的有关参数以及离子交换回收厂。D.E.斯托弗 陈隆玉 1998世界采矿快报1998,14,4:3
9Electrical and band-gap properties of amorphous zinc-indium-tin oxide thin filmsD.B. Buchholz D.E. Proffit M.D. Wisser T.O. Mason R.P.H. Chang 2012Progress in Natural Science:Materials International2012,22,1:2
10儿童和青少年PHOX2B型先天性中枢性低通气综合征患者的面部表型:面部畸形的定量研究显示文摘Congenital central hypoventilation syndrome (CCHS) is caused by mutations in PHOX2B,which is essential for maturation of the neural crest into the autonomic nervous system and is expressed in the dorsal rhombencephalon,a region that gives rise to facial structures. Digital photographs of 45 individuals with PHOX2B-confirmed CCHS,and 45 matched controls were analyzed for 17 linear and 6 angular measurements,and 9 derived indices. Paired t tests were used to compare group means,correlation was calculated between PHOX2B polyalanine expansion number and facial measures,and stepwise logistic regression was used to predict case-control and genotype status. CCHS cases differed significantly from controls on 13 variables (6 after p value correction:nasolabial angle,upper lip height,lateral lip height,facial index,upper facial index,and presence of inferior inflection of the lateral segment of the upper lip vermillion border). Five variables were able to predict correctly 85.7%of CCHS cases and 82.2%of controls:upper lip height,binocular width,upper facial height,nasal tip protrusion,and inferior inflection of the upper lip vermillion border. A negative relationship between number of repeats and four anthropometric measures was observed:mandible breadth,nasolabial angle,lateral lip height,and mandible-face width index. These results suggest a characteristic facial phenotype in children and young adults with CCHS,due to an expansion mutation in PHOX2B.Todd E.S. Weinberg S.M. Berry-Kravis E.M. D.E. Weese-Mayer 刘凯 2006世界核心医学期刊文摘(儿科学分册)2006,0,12:2
11First results from the CMD-3 Detector at the VEPP-2000 Collider显示文摘R.R. Akhmetshin A.V. Anisyonkov S.A. Ahokhin V.M. Aulchenko V.S. Banzarov L.M. Barkov N.S. Bashtovoy D.E. Berkaev A.E. Bondar A.V. Bragin S.I. Eidelman D.A. Epifanov L.B. Epshteyn G.V. Fedotovich S.E. Gayazov A.A. Grebenuk D.N. Grigoriev E.N. Gromov F.V. 2012Nuclear Physics B (Proceedings Supplements)2012,,:2
12Accumulation of atmospheric mercury in forest foliage显示文摘J.A. Ericksen M.S. Gustin D.E. Schorran D.W. Johnson S.E. Lindberg J.S. Coleman 2003Atmospheric Environment2003,,12:2
13通过一种新型甘油透明质酸钠/羧甲纤维素生物可吸收生物膜预防术后腹腔粘连:一项前瞻性、随机、盲法评估的多中心研究Cohen Z. Senagore A.J. Dayton M.T. D.E. Beck 陈云茹 2005世界核心医学期刊文摘(胃肠病学分册)2005,0,11:2
14Chemically durable iron phosphate glass wasteforms显示文摘D.E. Day Z. Wu C.S. Ray P. Hrma 1998Journal of Non-Crystalline Solids1998,,1:2
15Diet Energy Requirements of Growing Holsteins显示文摘D.E. Johnson G. Bernal 1998Journal of Dairy Science1998,,3:2
16半自磨回路改造为全自磨回路的生产试验显示文摘本文描述了美国国家钢球团公司基威廷球团厂把半自磨回路改造为带砾石提取和破碎的全自磨回路的生产试验过程。试验结果表明,采用带砾石提取和破碎的全自磨回路,磨机每小时产量可达到330~353t,约高于半自磨回路产量的10%。试验还证明,全自磨机还可进行细磨。采用全自磨后,可取消磨矿钢球、降低电耗、减少磨机衬板磨损。试验还对影响磨机产量的因素进行了探讨。D.E.希利 邓庆球 1993国外金属矿山1993,,6:2
17Evaluation of National Research Council and Cornell Net Carbohydrate and Protein Systems for Predicting Requirements of Holstein Heifers显示文摘M.E. Van Amburgh D.G. Fox D.M. Galton D.E. Bauman L.E. Chase 1998Journal of Dairy Science1998,,2:2
18Responses of soil microbial processes and community structure to tillage events and implications for soil quality显示文摘L.E. Jackson F.J. Calderon K.L. Steenwerth K.M. Scow D.E. Rolston 2003Geoderma2003,,3:2
19A statistics and energy based theory of dynamic fragmentation显示文摘D.E. Grady M.L. Olsen 2004International Journal of Impact Engineering2004,,1:1
20Increased Expression of LP-PLA2 in Aortic Stenosis Is Associated With Mineralization and Tissue Remodelling显示文摘M. Abulajiang M. Boulanger D.E. Husseini D. Fournier R. Bouchareb J. Després P. Pibarot Y. Bossé P. Mathieu 2013Canadian Journal of Cardiology2013,,10:1
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