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| 1 | 植物竞争研究进展显示文摘竞争系指两个以上有机体或物种间阻碍或制约的相互关系。它是塑造植物形态、生活史的主要动力之一;并对植物群落的结构和动态具有深刻的影响。因其在生态学的中心地位,生态学家已从不同的侧面研究了这一复杂的生态学现象;生态学也因此而得到了发展。然而,人们对竞争的理解不尽一致,因而导致了概念上的混乱,平行研究相对缺乏、不同研究间的比较困难,从而阻碍了学科的发展。本文试就植物竞争的概念、竞争理论、竞争研究的实验方法、影响竞争能力的主要因素、种内和种间竞争对种群和群落的影响,如竞争与物种共存等进行综述;我们在总结研究成就的同时,亦指出了现有研究的局限性。 | 李博 陈家宽 A.R.沃金森 | 1998 | 植物学通报1998,15,4: | 122 |
| 2 | 309例结直肠癌肝转移病人射频消融治疗后的5年生存率显示文摘有关结直肠癌病人肝转移射频消融(RFA)治疗后长期生存率的报道很少。本研究报道了309例[198例男性,平均64岁(24-92岁)1经617次治疗后的5年生存率的多元统计分析结果。标准治疗方法为联合US和CT引导/监测下经皮插入内冷电极。观察指标包括肝转移瘤的大小和数目.肝外病灶的有无和位置。原发灶切除、临床、化疗和随访资料。用SPSS V.10进行数据分析。在多元分析中,显著影响生存率的因素是出现肝外病灶(P〈0.001)和肝肿瘤的体积(P=0.001)。 | A.R. Gillams W.R. Lees. 胡维娟(译) 李威(校) | 2009 | 国际医学放射学杂志2009,32,4: | 31 |
| 3 | 汉诺坝玄武岩及大同火山群的岩石学和同位素地球化学显示文摘利用主元素、造岩矿物、REE及Sr、Nd、Pb同位素资料,对汉诺坝玄武岩和大同火山群的岩石学、地球化学、地幔源区特征、岩浆的分异和演化、玄武岩岩浆活动的构造条件进行了讨论。 | 解广轰 王俊文 Tatsumoto M. Basu A.R. | 1989 | 地球化学1989,18,4: | 21 |
| 4 | 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 |
| 5 | 非光滑表面对推土板的土壤粘附与阻力的影响(英文)显示文摘土壤对机械和机具的粘附是一个亟待解决的重要问题。本研究根据典型土壤动物蜣螂头部非光滑表面形貌设计了非光滑推土板。这种非光滑推土板的推土阻力随着推土板表面贴敷的小凸包的分布、凸包材料、切削速度、切削角、切削深度及土壤含水量的不同而变化。含水量由30.38%增加到35.50%,推土阻力随之减小。精选推土板之平均最大降阻可达30%。研究结果还表明超高分子量聚乙烯(UHMW—PF)能够明显地减粘降阻。 | A.R.盖斯雷尼 佟金 任露泉 陈秉聪 | 1993 | 农业工程学报1993,9,1: | 9 |
| 6 | 急性心肌梗死患者直接经皮冠状动脉介入术中无复流现象对6个月死亡率的影响显示文摘无复流是急性心肌梗死(AMI)患者经皮冠状动脉介入(PCI)术中常见的现象,可能影响心脏预后。作者将无复流的发生作为AMI患者行PCI的预后预测因素进行评估。前瞻性地收集了599例连续患者的相关资料,这些患者均因ST段抬高型AMI而接受PCI支架置人术,确认发生无复流(手术完成后TIMI血流〈3级)的患者,分析其基线特征和临床预后。 | Brosh D. Assali A.R. Mager A. R. Kornowski 杜媛 | 2007 | 世界核心医学期刊文摘(心脏病学分册)2007,3,7: | 9 |
| 7 | Performance evaluation of up-flow anaerobic sludge blanket(UASB) reactor for treatment of paper mill wastewater显示文摘The present study deals with the performance evaluation of the UASB reactor under varied organic loading rate(OLR) for the treatment of paper mill wastewater. The sludge granulation process started after 120 days from the start-up period. Sludge granules size was found to be 0 8 mm at OLR of 1 72 kgCOD/(m 3·d), which reached maximum size of about 1 0 to 1 2 mm at OLR of 2 1 kgCOD/(m 3·d). At the end of initial OLR of 1 0 kgCOD/(m 3·d) the VSS concentration was 12 86 gVSS/L, which got increased to 38 05 gVSS/L at the end of an OLR 2 1 kgCOD/(m 3·d). Most of the times VFA recorded were well within the limit of VFA reported in anaerobic fermentation process. Many times the pH observed was between 6 5 and 7 8, which is more favorable for any anaerobic process. It is also found that pH within the reactor increases along with the height of reactor. The total maximum biogas production was found to be 0 40 L/gCOD removals at OLR of 2 1 kgCOD/(m 3·d) and the maximum BOD removal at this stage was observed to be 90%. | M. Mahadevaswamy B.M. Sadashiva Murthy A.R. Girijamma | 2004 | Journal of Environmental Sciences2004,16,2: | 7 |
| 8 | PLINK: A Tool Set for Whole-Genome Association and Population-Based Linkage Analyses显示文摘 | Shaun Purcell Benjamin Neale Kathe Todd-Brown Lori Thomas Manuel A.R. Ferreira David Bender Julian Maller Pamela Sklar Paul I.W. de Bakker Mark J. Daly Pak C. Sham | 2007 | The American Journal of Human Genetics2007,,3: | 5 |
| 9 | 三座多跨简支桥抗震性能和承载力/需求分析显示文摘介绍新泽西州三座多跨简支桥的地震响应。主要目标是确定各种构件的承载力/需求比以评估地震的易损性和研究修复策略。另外一个主要目标是研究这些响应特性的效果,对这类桥的地震性能分析上响应特性是唯一的。此外,考虑桥与桥墩之间的刚性界面,对建模方法的效果和采用现有的需求曲线进行推覆分析的适当性也进行分析。研究包括具有代表性的三座2~4跨桥的非线性时程分析,这类桥在新泽西州和美国东部普遍存在。为了评估建模的效果,2维和3维建模分别被应用。许多参数被证明对多跨简支桥梁的地震响应有重大影响,例如,土与结构物的相互作用、邻跨之间的影响、钢支座和桥墩的可塑性。因此,根据综合参数研究,通过采用承载力/需求比对关键元素的量化,评估多跨简支桥的地震响应。此外,对与地震评估、修复和多跨简支桥设计有关的研究也进行了论述。 | M. Ala Saadeghvaziri A.R. Yazdani-Motlagh | 2008 | 钢结构2008,23,8: | 5 |
| 10 | 阿托西班及弥新平用于早产的治疗显示文摘Objective: To perform a comparison between atosiban (oxytocin antagonist) and nifedipin (calcium channel blocker) for acute treatment of preterm labor and their maternal safety. Methods: A randomized controlled trial study was performed on 80 pregnant women with preterm labor, between 26 and 34 weeks of pregnancy, in Akbar Abadi Teaching Hospital in Tehran, Iran. 40 women (the atosiban group) were compared with another 40 women (the nifedipin group) for the drugs’efficacy in delaying delivery for more than 48 h in order to undergo steroid therapy, and for more than 7 days or more, and also to assess their maternal safety. The duration between the drugs’administration and delivery were compared. The statistical analysis was performed using the Statistical Package for Social Science (SPSS). Results: There was no statistically significant difference between the two groups in the treatment of preterm labor. Atosiban was effective in 82.5%of cases, and nifedipin in 75%of the cases (p = 1.000), for delaying delivery for 48 h. Atosiban was effective in 75%of the cases, and nifedipin in 65%of the cases, for delaying delivery for more than 7 days. The maternal side effects in the atosiban group were 17.5%, and in the nifedipin group they were 40%, which had a statistically significant difference (p = 0.027). The duration between treatment and delivery was 29.03 ±16.12 days in the atosiban group and 22.85 ±13.9 days in the nifedipin group with no statistically significant difference (p = 0.79). Conclusion: Atosiban is an effective and safe drug for the acute treatment of preterm labor with minimal side effects, and it can be an option in the treatment of preterm labor, especially in patients with heart disease and multi-fetal pregnancies. | Kashanian M. Akbarian A.R. Soltanzadeh M. 朱国栋 | 2006 | 世界核心医学期刊文摘(妇产科学分册)2006,0,2: | 5 |
| 11 | STEP-POOL MORPHOLOGY IN HIGH-GRADIENT STREAMS显示文摘The focus of this study is to examine bed stability and morphology in high-gradient gravel-bed streams, and thus to improve understanding of the various parameters governing the sediment flow characteristics in mountain streams. Ultimately, this knowledge can be used to design pseudo-natural channels, as in the stream simulation method of culvert design; with this in mind, prototype conditions are evaluated in a flume with slopes ranging from 3% to 7%, and particle relative submergence varying from 0.5 to 2.5 for three bed size distributions. These experiments are designed to satisfy the conditions of dynamic similarity for flow and sediment, and they are preferred over field measurements since they allow a high degree of control over testing conditions. It is found that step-pool bedforms are the most ubiquitous features along the gravel bed. A new formula is developed that correlates step height with the gravel-bed size distribution, relative submergence of the particles, and the Froude number. The step spacing is found to be related to step height and streambed longitudinal slope. Flow resistance is also examined, and a formula is developed which accounts for the resistance due to the bedforms (form resistance), as well as the individual sediment particles (grain resistance). | A.R. MAXWELL and A.N. PAPANICOLAOU Research Assistant, Dept. of Civil and Envir. Engrg., Washington State University, Pullman, WA 99164-2910, Professor, Dept. of Civil and Envir. Engrg., Washington State University, Pullman, WA 99164-2910, | 2001 | International Journal of Sediment Research2001,16,3: | 5 |
| 12 | Investigation on leaching of malachite by citric acid显示文摘Leaching of an oxidized copper ore containing malachite, as a new approach, was investigated by an organic reagent, citric acid. Sulfuric acid is the most common reagent in the leaching of oxide copper ores, but it has several side effects such as severe adverse impact on the environment. In this investigation, the effects of particle size, acid concentration, leaching time, solid/liquid ratio, temperature, and stirring speed were optimized. According to the experimental results, malachite leaching by citric acid was technically feasible. Optimum leaching conditions were found as follows: the range of particle size, 105-150 μm; acid concentration, 0.2 M; leaching time, 30 min; solid/liquid ratio, 1:20 g/mL; temperature, 40°C; and stirring speed, 200 r/min. Under the optimum conditions, 91.61% of copper was extracted. | M.A. Shabani M. Irannajad A.R. Azadmehr | 2012 | International Journal of Minerals,Metallurgy and Materials2012,19,9: | 5 |
| 13 | 玄武岩中普通辉石、石榴石巨晶的研究(Ⅰ)——REE演化显示文摘辽宁宽甸、河北汉诺坝和福建明溪碱性玄武岩中的普通辉石和石榴石巨晶MgO、FeO、CaO含量的变化呈现了矿物的结晶分异趋势。从高温到低温晶出辉石的REE分馏程度不断增高,石榴石REE分馏程度不断降低,即两种巨晶中的LREE不断增加,而HREE逐渐减少,矿物的稀土模式曲线出现交叉现象。 用宽甸和汉诺坝任一层玄武岩作为液相与巨晶所计算的REE分配系数D_(矿物)^(REE)-玄武岩值,均与实验值相近,因而它不能旁证载体玄武岩就是巨晶的母岩浆。辉石晶出后残余岩浆比例Ⅰ值计算表明,母岩浆体可能是一个相对体积不太大的、主元素和REE成分不断变化的相对独立的地质体。 | 黄婉康 王俊文 解广轰 Basu A.R. | 1991 | 地球化学1991,20,2: | 5 |
| 14 | 自磨技术的新进展(一)显示文摘本文论述自磨的四个方面。第—部分将自磨与常规破碎和磨矿系统相比,论述有关自磨功率效率的见解。它还说明怎样能从自磨系统得到高功率效率。第二部分探讨一种矿石的简单试验方法,用来确定能以工业规模处理矿石的自磨机类型;还列述使用简单的小型设备与大型设备或难磨矿石的试验比较。第三部分探讨的是在合理设计自磨系统时必须考虑的一些重点。第四部分论述难磨矿石以及如何用自磨系统处理准磨矿石。 | A.R.麦克弗森 林贻红 | 1989 | 国外金属矿山1989,,10: | 5 |
| 15 | MRI定量肝灌注指数图:一种可能对抗肿瘤血管生成复合物BIBF1120(一种有效三联血管激酶抑制剂)治疗肿瘤效果可重复评估的方法显示文摘肝转移灶由肝动脉供血,造成肝灌注指数(HPI)增高。本研究的目的是用动态增强MRI定量分析肝转移灶在接受一种抗血管生成新药治疗前后的灌注指数。10例已知肝转移瘤的病人接受了动态增强MR成像检查。转移灶及全肝的HPI均由感兴趣区(ROI)获取,并以像素对像素的方式定量计算钆喷酸葡胺(Gd—DTPA)的浓度改变。治疗前HPI测量误差用Bland—Ahman法分析,在应用抗血管生成药物BIBF1120治疗前后中位HPI的比较应用Wilcoxon秩和检验。治疗前, | K. Miyazaki D.J. Collins S. Walker-Samuel J.N. Taylor A.R. Padhani M.O. Leach 赵艳萍(译) 刘文亚(校) 唐光健(校) | 2008 | 国际医学放射学杂志2008,31,5: | 4 |
| 16 | Daclatasvir: The First of a New Class of Drugs Targeted Against Hepatitis C Virus NS5A显示文摘 | I. Gentile F. Borgia N. Coppola A.R. Buonomo G. Castaldo G. Borgia | 2014 | Current Medicinal Chemistry2014,,12: | 3 |
| 17 | PLINK: A Tool Set for Whole-Genome Association and Population-Based Linkage Analyses显示文摘 | Shaun Purcell Benjamin Neale Kathe Todd-Brown Lori Thomas Manuel A.R. Ferreira David Bender Julian Maller Pamela Sklar Paul I.W. de Bakker Mark J. Daly Pak C. Sham | 2007 | The American Journal of Human Genetics2007,,3: | 3 |
| 18 | Experimental study on high-strength concrete beams failing in shear显示文摘 | A. Cladera A.R. Marí | 2005 | Engineering Structures2005,,10: | 2 |
| 19 | Primary Closure Versus T-tube Drainage After Open Choledochotomy显示文摘 | M. Ambreen A.R. Shaikh A. Jamal J.N. Qureshi A.G. Dalwani M.M. Memon | 2009 | Asian Journal of Surgery2009,,1: | 2 |
| 20 | The metallurgy of zinc-coated steel显示文摘 | A.R. Marder | 2000 | Progress in Materials Science2000,,3: | 2 |