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| 1 | 大数据分析的分布式MOLAP技术显示文摘大数据的规模效应给数据存储、管理以及数据分析带来了极大的挑战,学界和业界广泛采用分布式文件系统和MapReduce编程模型来应对这一挑战.提出了大数据环境中一种基于Hadoop分布式文件系统(HDFS)和MapReduce编程模型的分布式MOLAP技术,称为DOLAP(distributed OLAP).DOLAP采用一种特殊的多维模型完成维和度量的映射;采用维编码和遍历算法实现维层次上的上卷下钻操作;采用数据分块和线性化算法将维和度量保存在分布式文件系统中;采用数据块选择算法优化OLAP的性能;采用MapReduce编程模型实现OLAP操作.描述了DOLAP在科学数据分析的应用案例,并与主流的非关系数据库系统进行性能对比.实验结果表明,尽管数据装载性能略显不足,但DOLAP的性能要优于基于HBase,Hive,HadoopDB,OLAP4Cloud等主流非关系数据库系统实现的OLAP性能. | 宋杰 郭朝鹏 王智 张一川 于戈 Jean-Marc PIERSON | 2014 | 软件学报2014，25，4： | 33 |
| 2 | A review of concentrated flow erosion processes on rangelands:Fundamental understanding and knowledge gaps显示文摘Concentrated flow erosion processes are distinguished from splash and sheetflow processes in their enhanced ability to mobilize and transport large amounts of soil,water and dissolved elements.On rangelands,soil,nutrients and water are scarce and only narrow margins of resource losses are tolerable before crossing the sustainability threshold.In these ecosystems,concentrated flow processes are perceived as indicators of degradation and often warrant the implementation of mitigation strategies.Nevertheless,this negative perception of concentrated flow processes may conflict with the need to improve understanding of the role of these transport vessels in redistributing water,soil and nutrients along the rangeland hillslope.Vegetation influences the development and erosion of concentrated flowpaths and has been the primary factor used to control and mitigate erosion on rangelands.At the ecohydrologic level,vegetation and concentrated flow pathways are engaged in a feedback relationship,the understanding of which might help improve rangeland management and restoration strategies.In this paper,we review published literature on experimental and conceptual research pertaining to concentrated flow processes on rangelands to:(1)present the fundamental science underpinning concentrated flow erosion modeling in these landscapes,(2)discuss the influence of vegetation on these erosion processes,(3)evaluate the contribution of concentrated flow erosion to overall sediment budget and(4)identify knowledge gaps. | Sayjro K.Nouwakpo Christopher J.Williams Osama Z.Al-Hamdan Mark A.Weltz Fred Pierson Mark Nearing | 2016 | International Soil and Water Conservation Research2016，4，2： | 2 |
| 3 | Real-time monitoring and control of sequencing batch reactors for secondary treatment of a poultry processing wastewater 显示文摘 | Pierson John A Pavlostathis Spyros G | 2000 | Water Environment Researeh2000，72，5： | 2 |
| 4 | When Effect Becomes Cause: Policy Feedback and Political Change显示文摘 | Paul Pierson | 1993 | World Politics1993，，4： | 2 |
| 5 | SEDIMENT YIELD AND HYDROLOGY INNORTHWESTERN RANGELANDS显示文摘Much of the rangeland of northwestern North America occupies highly variable, high-relief terrain withsteep slopes, contrasting aspects, strong elevation gradients and diverse local climates. Rangeland erosionand sediment production are major concerns in northwestern natural resource management. Seasonalvariability in precipitation, streamflow and energy available for sediment rnobilization and transport ispronounced in northwestern rangeland catchments; thus, runoff and sediment yield exhibit high spatialand temporal variability. The sediment regime of such watersheds cannot be characterized by simpleindices or short-term local measurements. A long-term experimental rangeland watershed demonstratesthe need for sustained measurement programs over a range of catchment scale and topographic position, todetermine actual patterns and rates of runoff and sediment yield. More research is needed to identify andquantify the pathways of sediment from initial detachment to temporary storage and subsequentremobilization and transport through the stream system. The role of extreme hydrologic events inaccelerated landscape erosion, remobilization of stored sediment, and interaction with dynamic channel-forming processes in rangeland streams remains inadequately defined. It is necessary to better determinelandscapes and channels susceptible to treatment to reduce stream sedimentation, and to populate andparameterize simulation models for rangeland catchmenhstream systems. Such information is requiredto address emerging issues of riparian zone and water quality management in northwestern rangelands. | Charles W. Slaughter(Research Leader, Northwest Watershed Research Center, USDA Agricultural Research Service, 800 ParkBoulevard, Suite 105 Boise, Idaho 83712 USA)Frederick B. Pierson(Research Hydrologist, Northwest Watershed Research Center, USDA Agricul | 2000 | International Journal of Sediment Research2000，15，2： | 2 |
| 6 | The chemical vapor deposition of carbon on carbon fibers显示文摘 | Pierson H Lieberman M | 1975 | Carbon1975，13，1： | 1 |
| 7 | Real-time monitoring and control of sequencing batch reactors for secondary treatment of a poultry processing wastewater显示文摘 | PIERSON J A PAVLOSTATHIS S G | 2000 | Water Environment Research2000，72，5： | 1 |
| 8 | The control of cathodoluminescence in dolomite by iron and manganese显示文摘 | Pierson B J | 1981 | Sedimentology1981，28，5： | 1 |
| 9 | Effect of chemical-vapor-deposition conditions on the properties of carbon-carbon composites 显示文摘 | Granoff B Pierson H O Schuster D M | 1973 | Carbon1973，11，3： | 1 |
| 10 | The chemical vapor deposition of carbon on carbon fibers显示文摘 | Pierson H O Lieberman M L | 1975 | Carbon1975，13，3： | 1 |
| 11 | Use of mixtures of fluorescent pseudo-monads to suppress take-all and improve the growth of wheat显示文摘 | Pierson E A Weller D M | 1994 | Phytopathology1994，84，： | 1 |
| 12 | Gonadal steroids regulate GABA(A) receptor subunit mRNA expression in NT2 - N neurons显示文摘 | Pierson RC Lyons AM Greenfield LJ Jr | 2005 | Brain Res Mol Brain Res2005，138，2： | 1 |
| 13 | Optimal planar evasive aircraft maneuvers against proportional navigation missiles 显示文摘 | Ong S Y Pierson B L | 1996 | Journal of Guidance Control and Dynamics1996，19，6： | 1 |
| 14 | Sto- chastics on ance on a circle 显示文摘 | WIESENFELD K PIERSON P PANT AZE LOU E | 1994 | Physical Review Letters1994，72，14： | 1 |
| 15 | The chemical vapor deposition of carbon on carbon fibers显示文摘 | LIEBERMAN M L | 1975 | Carbon1975，13，13： | 1 |
| 16 | Early gene responses of trophic factor in nerve regeneration differ in experimental type 1 and type 2 diabetic polyneuropathies显示文摘 | Pierson MD Weixian MD | 2002 | Journal of Neuropathology and Experimental Neurology2002，10，： | 1 |
| 17 | Finger seal solid modeling design and some solid/fluid interaction considerations 显示文摘 | Braun M J Pierson H M Kudriavtsev V V | 2003 | Tribology Transactions2003，46，4： | 1 |
| 18 | Biotherapeutic efects of probiotic bacteria on candidiasis on immunodeficient mice显示文摘 | Wager R D Pierson C Warner T | 1997 | Infection Immunity1997，65，10： | 1 |
| 19 | Radar Scattering and Equilibrium Ranges in Wind-generated Waves with Applications to Scatterometry显示文摘 | Donelan M A Pierson W J | 1987 | Journal of Geophysical Research1987，92，5： | 1 |
| 20 | Pollen tube growth is coupled to the extracellular calcium ion flux and the intracellular calcium gradient effect of BAPTA-type buffers and hypertonic media显示文摘 | Pierson E S Miller D D Callaham D A Shipley A M Rivers B A Cresti M Hepler P K | | 0，，12： | 1 |
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