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155篇 您的检索式:作者名="L.F."
    题名 作者 年代 出处 被引量
1Core Collection Based Backcrossing: An Eff icient Approach for Breeding, Germplasm Enhacement and Gene Discovery显示文摘Plant germplasm underpins much of crop development. Millions of germplasm accessions have been collected and conserved ex situ, and the major challenge is now how to exploit and utilize this abundant resource.J.Z. Jia R.H. Zhou X.Y. Zhang L. Zhang Y.L. Li J. Wang X.Z. Liu L.F. Gao S.B. Liu 2007分子植物育种2007,5,2:8
2Engineering complex systems applied to risk management in the mining industry显示文摘Related to complexity, there is a wide diversity of concepts, ranging from ‘‘systemic' to ‘‘complex', implying a need for a unified terminology. Per different authors, the main drivers of complexity can be found in human behaviour and uncertainty. This complexity, structural or dynamic can be organizational, technological, or nested in their relationship. ISO international standard 31000:2009 definition of risk management ‘‘coordinated activities to direct and control an organization with regard to risk', when applied to economic sectors, industry, services, project, or activity, it requires the use of models or theories as guidelines. Therefore, as its basic elements comprehend human behaviour and/or uncertainty, risk management to be effective and adapted as much as possible to reality, must be operational within complex systems, as already demonstrated in different R&D environments. Risk management faces demanding challenges when approaching specific and endogenous needs, such as the mining sector. This paper presents a multivariable function analysis methodology approach based on complex system modelling and through real data corresponding to a risk management tool in the mining sector.Domingues Maria S.Q. Baptista Adelina L.F. Diogo Miguel Tato 2017International Journal of Mining Science and Technology2017,27,4:7
3CALCULATION OF SECOND PHASE PARTICLE-GRAIN BOUNDARY INTERACTION RANGE显示文摘根据由 Hellman 和 Worner 的相应分析的谷物边界方程,这篇文章是从谷物边界方程的适用性看了处理在秒阶段粒子(SPP ) 和谷物边界(GB ) 之间的相互作用范围。另外,描述相互作用范围的新表情被导出,它在在 SPP 和 GB 之间的相互作用范围能仅仅是以前分析的品质上的理论解决这个问题。它被看给在 SPP 和 GB 之间的相互作用位置那,相互作用范围能是这表情的使用决定的份量上。X.L. Wang Y.H. Wei W. Wang L.F. Hou 2008Acta Metallurgica Sinica(English Letters)2008,21,1:6
4EFFECT OF INTERPHASE LIFT FORCE ON THE FLUID FLOW IN AN AIR-STIRRED CYLINDRICAL VESSEL显示文摘In the present paper, based on the two-phase model (Eulerian model), the two dimensional fluid flow liz air-stirred water systems is simulated, and the effect of interphase lift force on the fluid flow is specially discussed. In the Eulerian two-phase model, gas and liquid phase are considered to be two different continuous fluids interacting with each other through the finite inter-phase areas. The exchange between the phases is represented by source terms in conversation equations. Turbulence is assumed to be a property of the liquid phase, k - ε model is used to describe the behavior of the liquid phase. The dispersion of phases due to turbulence is represented by introducing a diffusion term in mass consecrvation equation. The contribution of bubble movement to the turbulent energy and its dissipation rate is taken into accounted by adding extra volumetric source terms to the equations of turbulent enemy and its dissipation rate. The comparison between the mathematical simulation and experiment data indicates that the interphase lift force has a big effect on the flow behavior, and considering both drug force and lift force as interphase forces is important to accurately simulate the gas-water two-phase fluid flow in air-stirred systems. The interphase lift force makes bubbles move away from the centerline, the gas concentration is decreased near the centerline, and increased near the wall. The lift force is smaller than drug force at the same place, especially far away from the centerline.L.F. Zhang K.K. Cai Y. Qu and Y.S. Shen Postdoctoral Fellow of Japan Science Promotion Society Taniguchi Lab., Department of Metallurgy, Graduate School of Engineering, Tohoku University, Sendai980-8579, Japan School of Metallurgy, University of Scien 2000Acta Metallurgica Sinica(English Letters)2000,13,4:6
5马立克病病毒群共同性抗原P79蛋白质基因的鉴定和定位显示文摘马立克病病毒(MDV)的79kD蛋白质是该属3个型共有的抗原。用抗该抗原的单克隆抗体T81(MAb T81),从建于大肠杆菌噬菌体λgt11中MDV感染的鸭胚成纤维细胞基因组DNA的基因库中,筛选到一个能表达该蛋白质片段的克隆GB-2。对该重组噬菌体的DNA做酶切分析,用PCR扩增插入片段,结果表明GB-2含一个2.5kb来自MDV的插入片段。用标记的该片段DNA作探针,分别与GA株MDV感染的鸭胚成纤维细胞基因组DNA的限制性内切酶消化物及MDV基因组DNA的BamH I-B片段做Southern blot和分子杂交反应,结果证明,编码MDV属共同抗原79kD蛋白质的基因位于其基因组DNA酶切图的BamH I-R片段及B和O片段与R联结的部分。崔治中 段玉友 Lec L.F. 1993病毒学报1993,9,1:4
6MICROSTRUCTURE 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
7Grain refinement mechanism of multiple laser shock processing impacts on ANSI 304 stainless steel显示文摘J.Z. Lu K.Y. Luo Y.K. Zhang G.F. Sun Y.Y. Gu J.Z. Zhou X.D. Ren X.C. Zhang L.F. Zhang K.M. Chen C.Y. Cui Y.F. Jiang A.X. Feng L. Zhang 2010Acta Materialia2010,,16:3
8COMPARISON OF SURFACE PROPERTIES OF Ti-6Al-4V COATED WITH TITANIUM NITRIDE, TiN+TiC+Ti(C,N)/DLC, TiN/DLC AND TiC/DLC FILMS BY PLASMA-BASED ION IMPLANTATION显示文摘Ji, H.B. Xia, L.F. Ma, X.X. Sun, Y. Sun, M.R. 2000Acta Metallurgica Sinica(English Letters)2000,13,4:3
9推进式食管-胃-十二指肠镜的病灶检出率依赖于隐匿性胃肠道出血的类型Lara L.F. Bloomfeld R.S. Pineau B.C. 尹勇 2005世界核心医学期刊文摘(胃肠病学分册)2005,0,11:3
10Three-dimensional numerical simulation of Vickers indentation tests显示文摘J.M. Antunes L.F. Menezes J.V. Fernandes 2005International Journal of Solids and Structures2005,,3:2
11减少卵子老化对于补救性卵母细胞单精子显微注射结局的影响显示文摘Objective: To evaluate the results of a novel protocol that allows to rescue IVF unfertilized oocytes by intracytoplasmic sperm injection (ICSI).Design: Prospective clinical trial.Setting: Private reproductive medical center.Patient(s): Thirty patients undergoing IVF.Intervention(s): Controlled ovarian stimulation (COS), conventional IVF, rescue ICSI, embryo culture, and embryo transfer.Main Outcome Measure(s): Identification of unfertilized IVF oocytes 6 hours after insemination and fertilization, and developmental rates of those oocytes after rescue microinjection, as well implantation and pregnancy rates (PR).Result(s): All oocytes (392) from 30 patients were inseminated with standard IVF 3 hours after ovum pick- up.Polar body (PB) status was checked at decumulation and rechecked 3 hours later.Eighty- two oocytes were fertilized after IVF alone and 184 nonactivated oocytes (failed fertilization) were rescue microinjected and 166 of them fertilized (20 patients).Cleavage stage on day 2 was significantly more advanced and embryo grade was higher after standard IVF fertilization than after rescue ICSI.Eight of the 30 embryos transferred were implanted in the IVF- only patients (27% )- and 8 of 68 embryos in the rescue ICSI patients (12% ).Conclusion(s): Rescue ICSI of unfertilized IVF oocytes 6 hours after insemination (9 hours after egg retrieval) can provide normal fertilization, embryo development, and pregnancy; however, corresponding outcome parameters tend to be impaired in comparison to the standard IVF fertilization results.Nagy Z.P. Rienzi L.F. Ubaldi F.M. 朱亮 2006世界核心医学期刊文摘(妇产科学分册)2006,2,9:2
12Effects of feeding rumen-protected choline on incidence of diseases and reproduction of dairy cows显示文摘F.S. Lima M.F. Filho L.F. Greco J.E.P. Santos 2011The Veterinary Journal2011,,1:2
13Ⅰ或Ⅱ期子宫癌肉瘤(混合中胚层肿瘤)全切患者术后辅以异环磷酰胺和顺铂化疗的疗效:一项GOG研究Sutton G. Kauderer J. Carson L.F. 刘亦恒 2005世界核心医学期刊文摘(妇产科学分册)2005,0,7:2
14Body weight and body condition of breeding rabbits in commercial units显示文摘L.F. de la Fuente J.M. Rosell 2012Journal of Animal Science2012,,9:1
15Living Donor Liver Transplantation for Acute Liver Failure: A Single Center Experience显示文摘L.P. Cariús L.F. Pacheco-Moreira E. Balbi C.R.G. Leal A.C. Gonzalez L.V. Agoglia C. Araújo M. Enne J.M. Martinho 2009Transplantation Proceedings2009,,3:1
16Effective treatment of rat adjuvant-induced arthritis by celastrol显示文摘R. Casc?o B. Vidal H. Raquel A. Neves-Costa N. Figueiredo V. Gupta J.E. Fonseca L.F. Moita 2012Autoimmunity Reviews2012,,12:1
17Evaluating marine ecosystem health: Case studies of indicators using direct observations and modelling methods显示文摘I. Rombouts G. Beaugrand L.F. Artigas J.-C. Dauvin F. Gevaert E. Goberville D. Kopp S. Lefebvre C. Luczak N. Spilmont M. Travers-Trolet M.C. Villanueva R.R. Kirby 2013Ecological Indicators2013,,:1
18FLT3 internal tandem duplication during myelodysplastic syndrome follow-up: a marker of transformation to acute myeloid leukemia显示文摘Ronald Feitosa Pinheiro Eloisa de Moreira Maria Regina Régis Silva Fernando Lopes Alberto Maria de Lourdes L.F. Chauffaille 2008Cancer Genetics and Cytogenetics2008,,2:1
19Hyperemic Stenosis Resistance Index for Evaluation of Functional Coronary Lesion Severity显示文摘Martijn Meuwissen Maria Siebes Steven A.J. Chamuleau Berthe L.F. van Eck-Smit Karel T. Koch Robbert J. de Winter Jan G.P. Tijssen Jos A.E. Spaan Jan J. Piek 2002Circulation: Journal of the American Heart Association2002,,:1
20Preparation of new 5-fluorouracil-loaded zein nanoparticles for liver targeting显示文摘L.F. Lai H.X. Guo 2010International Journal of Pharmaceutics2010,,1:1
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