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2214篇 您的检索式:作者名="MARCHES"
    题名 作者 年代 出处 被引量
1Exploration and Exploitation in Organizational Learning显示文摘James G. March 1991Organization Science1991,,1:16
2POLYMER CHARGE AND MOLECULAR WEIGHT EFFECTS ON TREATED IRRIGATION FURROW PROCESSES显示文摘Application of 5-10 mg L-1 water soluble anionic polyacrylamide (PAM) to furrow irrigation water during flow advance substantially reduces sediment loss and increases net infiltration. We hypothesized that PAM_s solvated molecular conformation influences its irrigation-management efficacy. The study was conducted in Kimberly, Idaho, on Portneuf silt loam (Durinodic Xeric Haplocalcids), under furrowirrigated beans (Phaseolus vulgaris ) at a 1.5% slope. Polyacrylamides with contrasting molecular weight (anionic; 4-7, 12- 15 and 14-17 MDa, i.e. Mg mol-1 ), charge type (neutral, anionic, cationic), and charge density (8, 19, 35 mol %) were tested in two studies. Inflow rate was 23 L min-1 during furrow advance, and 15 L min-1 for the remaining set. Anionic and neutral PAMs were twice as effective as cationic PAMs for controlling sediment loss in new furrows. The order of effectiveness for overall soilloss control was : anionic >neutral >cationic PAM, and efficacy increased with increasing charge density and/or molecular weight. Net furrow infiltration increased by 14 to 19% when PAM treatment molecular weight was reduced from 17 to 4 MDa. General trends suggested that medium and high charge density anionic and neutral PAM produced the greatest increase in infiltration compared with controls.Compared with untreated furrows, neutral PAM gave the greatest season-long net infiltration gains (5%),while charged PAMs tended to increase net infiltration early in the season on new furrows but decreased infiltration on repeat-irrigated furrows later in the season.R. D. Lentz(USDA-ARS, Northwest Irrigation and Soils Research Laboratory, Kimberly, ID)R. E. Sojka (Landcare Research, New Zealand, Ltd, Palmerston North, New ZealandNote: The manucript of this paper was received in March 1999, Discussion open until March 2000International Journal of Sediment Research2000,15,1:13
3面向并行文件系统的性能评估及相对预测模型显示文摘基于Lustre文件系统,对并行文件系统的性能评估和性能建模进行了研究.通过对性能因子的调研,进行了一系列性能评估实验,并提出性能相关性模~(PRModel).在实验评估和PRModel分析中发现,在不同的性能因子之间存在着紧密的性能相关性,为了挖掘并利用这种相关性信息,提出了一种相对性能预测模(RPPModel)来预测不同性能因子条件下的性能.为了验证RPPModel的有效性,设计了大量实验用例.结果表明,预测结果的平均相对误差能够控制在170/o---28%的范围内,易于使用且具有较好的预测准确度.赵铁柱 董守斌 Verdi MARCH Simon SEE 2011软件学报2011,22,9:7
4巨噬细胞集落刺激因子与血管平滑肌细胞增殖显示文摘目的一些以血管平滑肌细胞(VSMC)增殖为特点的血管疾病,在病变部位常有巨噬细胞浸润。本研究巨噬细胞集落刺激因子(MCSF)在VSMC生长调节中的作用。方法实验采用培养大鼠主动脉VSMC,细胞增殖观察指标采用氚标胸腺嘧啶核苷掺入法,并用Northernblot技术测定原癌基因表达。结果(1)L929细胞上清液(富含MCSF)及重组MCSF以剂量依赖关系刺激氚标胸腺嘧啶核苷掺入;(2)VSMC在接受刺激后表达某些原癌基因,如cfos、cmyc、erg1和JunB;(3)凝血酶、PDGF、bFGF与MCSF在促增殖作用上具有协同作用。结论MCSF与其它生长因子协同作用,通过自分泌/旁分泌机制调控VSMC增殖。朱鼎良 Gogusev J Marche P 1998中华心血管病杂志1998,26,6:5
5基于机器学习的并行文件系统性能预测显示文摘并行文件系统能有效解决高性能计算系统的海量数据存储和I/O瓶颈问题.由于影响系统性能的因素十分复杂,如何有效地评估系统性能并对性能进行预测成为一个潜在的挑战和热点.以并行文件系统的性能评估和预测作为研究目标,在研究文件系统的架构和性能因子后,设计了一个基于机器学习的并行文件系统预测模型,运用特征选择算法对性能因子数量进行约简,挖掘出系统性能和影响因子之间的特定的关系进行性能预测.通过设计大量实验用例,对特定的Lustre文件系统进行性能评估和预测.评估和实验结果表明:threads/OST、对象存储器(OSS)的数量、磁盘数目和RAID的组织方式是4个调整系统性能最重要因子,预测结果的平均相对误差能控制在25.1%~32.1%之间,具有较好预准确度.赵铁柱 董守斌 董守斌 Verdi March Simon See 2011计算机研究与发展2011,48,7:5
6APPLICABILITY OF THE MASS ACTION LAW IN COMBINATION WITH THE COEXISTENCE THEORY OF METALLIC MELTS INVOLVING COMPOUND TO BINARY METALLIC MELTS显示文摘Based on the atomicity and molecularity as well as the consistency of thermodynamicproperties and activities of metallic melts with their structures, the coexistence the-ory of metallic melts structure involving compound has been suggested. According tothis theory, the calculating models of mass action concentrations for different binarymetallic melts have been formulated. The calculated mass action concentrations agreewell with corresponding measured activities, which confirms that the suggested theorycan reflect the structural characteristics of metallic melts involving compound and thatthe mass action law is widely applicable to this kind of metallic melts.J.ZhangMetallurgical Engineering School, University of Science and Technology Beijing, Beijing 100083, China Manuscript received 9 March 2001 in revised form 7 August 2001 2002Acta Metallurgica Sinica(English Letters)2002,15,4:4
7Secretion of Angiogenic and Antiapoptotic Factors by Human Adipose Stromal Cells显示文摘Jalees Rehman Dmitry Traktuev Jingling Li Stephanie Merfeld-Clauss Constance J. Temm-Grove Jason E. Bovenkerk Carrie L. Pell Brian H. Johnstone Robert V. Considine Keith L. March 2004Circulation: Journal of the American Heart Association2004,,10:4
8Exploration and Exploitation in Organizational Learning显示文摘James G. March 1991Organization Science1991,,1:3
9Phosphate Rock Fertilizer in Acid Soils: Comparing Phosphate Extraction Methods for Measuring Dissolution显示文摘INTRODUCTIONTheextentofdissolutionofphosphaterock(PR)insoilhasbeendeterminedbyeithermeasuringtheincreaseintheamountsofsoluble...T. S. ANSUMANA KAWA and WANG GUANGHUO Department of Soil Science and Applied Chemistry, College of Natural Resources and Environmental Sciences, Zhejiang Agricultural University, Hangzhou 310029 (China) (Received March 13, 1998 revised April 22, 199 1998Pedosphere1998,8,3:3
10Determination of dioxins/furans and PCBs by quadrupole ion-trap gas chromatography-mass spectrometry显示文摘Plomley J B Lausevic M March R E 2000Mass Spectrometry Review2000,19,:2
11Syntheses and Liquid Crystal Properties of New Rare Earth Sandwich Type Heteropoly Compounds显示文摘BI Li hua \{**\}, LIU Jing hua *** , WANG En bo **** , HUANG Ru dan YU Yong zhang and WU Ping song (Department of Chemistry, Northeast Normal University, Changchun 130024, P.R. China) (Received March 29, 1999) 1999Chemical Research in Chinese Universities1999,15,4:2
12Gene therapy for restenosis: getting nearerthe heart of matter显示文摘Baek S March KL 1998Circ Res1998,82,10:2
13Secretion of Angiogenic and Antiapoptotic Factors by Human Adipose Stromal Cells显示文摘Jalees Rehman Dmitry Traktuev Jingling Li Stephanie Merfeld-Clauss Constance J. Temm-Grove Jason E. Bovenkerk Carrie L. Pell Brian H. Johnstone Robert V. Considine Keith L. March 2004Circulation: Journal of the American Heart Association2004,,10:2
14Synthesis of Diethyl Oxalate by a Coupling-Regeneration Reaction of Carbon Monoxide显示文摘This article describes a process for the synthesis of diethyl oxalate by a coupling reaction ofcarbon monoxide, catalyzed by palladium in the presence of ethyl nitrite. The kinetics and mechanism ofthe coupling and regeneration reaction are also discussed. This paper presents the results of a scale-uptest of the catalyst and the process based on an a priori computer simulation.Fandong Meng,Genhui Xu,Baowei Wang,Xinbin Ma1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China 2. Luoyang Petrochemical Engineering Corporation, Luoyang 471003, China revised Apr 2002Journal of Natural Gas Chemistry2002,11,1:2
15Phase Diagram and Raman Imaging of Grain Growth Mechanisms in Highly Textured Pb( Mg1/3 Nb2/3 )O3-PbTiO3 Piezoelectric Ceramics显示文摘Thi Mai Pham March Gregory Colomban Philippe 2005J Eur Ceram Soc2005,25,14:1
16Role of Tir and intimin in the virulence of rabbit Enteropathogenic Escherichia coli serotype O103:H2显示文摘Marches O Nougayrede JP Boullier S 2000Infect Immun2000,68,4:1
17Economics of osteoarthritis:a global perspective显示文摘March LM Bachmeier CJ 1997Baillieres Clin Rheumatol1997,11,4:1
18MEMS for geo- physicists显示文摘Tessman J Reichert B March J 2001Expanded Abstracts of 71st Annual In- ternat SEG Mtg2001,2124,:1
19Hysteroscopic management of intrauterine adhesions显示文摘March CM Israel R March AD 1978Am J Obstet Gynecol1978,130,6:1
20Exploration and exploitation in organizational learning显示文摘March J G 0,,:1
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