1 parallel and serial data
Báo cáo y học: "Statistics review 1: Presenting and summarising data" pptx
Ngày tải lên :
12/08/2014, 18:21
... numbers of smaller and larger values on either side The mean, median and mode of these data are shown in Table Notice that the mean and the median are similar This is because the data are approximately ... data will lie between the bottom and top deciles and so on Standard deviation The standard deviation is a measure of the degree to which individual observations in a dataset deviate from the mean ... the data into two equally sized groups The lower and upper quartiles split the data into four equally sized groups (4 × 12) and are therefore most easily defined as the average of the 12th and...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P1 pdf
Ngày tải lên :
21/01/2014, 18:20
... the first serial part has been Serial Part Parallel Part Serial Part Figure 1.3 Serial part vs parallel part 12 Chapter Introduction Parallel Part waiting waiting waiting Serial Part Serial Part ... Overview: Parallel Databases and Grid Databases Parallel Query Processing: Motivations Parallel Query Processing: Objectives 1.3.1 1.3.2 1.3.3 1.4 10 12 Interquery Parallelism 13 Intraquery Parallelism ... 286 Grid Databases 10 Transactions in Distributed and Grid Databases 291 10.1 Grid Database Challenges 292 10.2 Distributed Database Systems and Multidatabase Systems 10.2.1 Distributed Database...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P2 docx
Ngày tải lên :
21/01/2014, 18:20
... methods for parallel databases have been reported by Hua and Lee (VLDB 1990) and Ibá nez-Espiga and Williams (DEXA 1992) Data placement used by the Bubba Database Machine was presented by Copeland (SIGMOD ... recent years, data partitioning and placement have been adopted by new database domains, such as data warehouses and multidimensional, XML data, and the Grid Furtado (2004) discussed data partitioning ... Our data skew and processing skew models adopt the above Zipf skew model 2.4 BASIC OPERATIONS IN PARALLEL DATABASES Operations in parallel database systems normally follow these steps: ž ž Data...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P3 docx
Ngày tải lên :
21/01/2014, 18:20
... present various parallel sorting techniques, whereas Iyer and Dias (ICDE 1990) and DeWitt et al (1992) discuss systems issues in parallel database sorting Parallel sorting for databases uses external ... or no skew, then use parallel partitioned sort 4.7 Investigate your favourite parallel DBMS, and show how parallel sort and parallel group-by are expressed in SQL Chapter Parallel Join The join ... Algorithms “Divide and broadcast”-based parallel join algorithms are composed of two stages: data partitioning using the divide and broadcast method and a local join The divide and broadcast data partitioning...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P4 pptx
Ngày tải lên :
21/01/2014, 18:20
... namely, parallel index structures, parallel index maintenance, and parallel index storage In Section 7.1, a classification of parallel indexing for parallel databases is outlined The details of parallel ... database operations, and subsequently, parallel join has been one of the main focuses in the work on parallel databases There are hundreds of papers on parallel join, mostly concentrated on parallel ... in two stages: data partitioning and local join In this way, parallelism is achieved through data parallelism whereby each processor concentrates on different parts of the data and the final query...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P5 pptx
Ngày tải lên :
21/01/2014, 18:20
... but spread spread spread, but spread not random randomly randomly not random randomly randomly not random randomly Figure 7.26 A comparative table for parallel multi-index selection query processing ... search search Local data Local data Remote Remote Remote load load data load data load data load Not Not Not necessary necessary necessary N/A N/A Local data Remote Local data load data load load ... Standard database textbooks, like Elmasri and Navathe (2007) and Ramakrishnan and Gehrke (2000) cover basic indexing structures (e.g., BC trees) for database systems Indexing for parallel database...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P6 doc
Ngày tải lên :
21/01/2014, 18:20
... formulation of parallel algorithms of each query operation This chapter, on the other hand, concentrates on parallel query optimization, and in particular parallel subquery scheduling and dynamic parallel ... the simple replication data partitioning is not applicable Parallel Subcollection Join Algorithms Data partitioning methods available are divide and broadcast and divide and partial broadcast ... described various parallelism models, including intra- and interclass parallelism The research group of Sampaio and Smith et al published various papers on parallel algebra for object databases (1999),...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P7 ppt
Ngày tải lên :
21/01/2014, 18:20
... main differences between distributed databases and multidatabase systems 10.3 Discuss the suitability of parallel databases, distributed databases, and multidatabase systems in the Grids 10.4 Describe ... distributed data, replicating the data at local sites for efficient access, and fast processing of data by divide -and- conquer technique, and at times distributed processing is computationally and economically ... requirements separate the two database systems Local database systems in multidatabase systems 298 Chapter 10 Transactions in Distributed and Grid Databases Global Data Dictionary Multidatabase/ Global DBMS...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P8 pptx
Ngày tải lên :
21/01/2014, 18:20
... homogeneous and synchronous distributed database systems cannot be implemented in Grid databases because of architectural limitations (Grid databases are heterogeneous and asynchronous) (2) Multidatabase ... (distributed and multidatabase), and the recovery model for DBMS without global information (Grid database) Figure 12.8 shows the recovery model for an individual database site The stable database ... Grid-ACP, and outline the differences between failure recovery in Grid-ACP and other systems (e.g., distributed and multidatabase systems) Chapter 13 Replica Management in Grids Grid databases or data...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P9 pdf
Ngày tải lên :
21/01/2014, 18:20
... rules and parallel sequential patterns, respectively 16.1 FROM DATABASES TO DATA WAREHOUSING TO DATA MINING: A JOURNEY All three, databases, data warehouses, and data mining, deal with data Therefore, ... covering basic data mining tasks, differences between data mining and database querying, and parallelism techniques for data mining algorithms Following this, Sections 16.3 and 16.4 describe parallel ... chapters on parallel data mining (Chapters 16 and 17) is twofold: High-Performance Parallel Database Processing and Grid Databases, by David Taniar, Clement Leung, Wenny Rahayu, and Sushant Goel...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P10 pptx
Ngày tải lên :
21/01/2014, 18:20
... data parallelism and result parallelism in parallel clustering Data Parallelism Parallel k-Means Like count distribution in parallel association rules and parallel sequential patterns, data parallelism ... intraoperation parallelism (partitioned parallelism or data parallelism), interoperation parallelism (pipelined parallelism and independent parallelism), and mixed parallelism In data mining, for ... input data More details about these two data mining parallelisms are given below Data Parallelism In data parallelism, as the name states, parallelism is basically created because the data is...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P11 doc
Ngày tải lên :
26/01/2014, 15:20
... is used Parallel k-means and the parallel decision tree adopt data parallelism and result parallelism Data parallelism in clustering is based on data partitioning whereby 496 Chapter 17 Parallel ... are serial subqueries execution scheduling and parallel subqueries execution scheduling, whereas for parallel data mining, this chapter introduces data parallelism and result parallelism A parallel ... scheduling, whereas result parallelism is identical to parallel subqueries execution scheduling Both data parallelism and result parallelism for a decision tree are described below Data Parallelism for...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P12 ppt
Ngày tải lên :
26/01/2014, 15:20
... Rau-Chaplin, A., “Parallelizing the Data Cube”, Distributed and Parallel Databases, 11(2):181–201, 2002 Dehne, F., Eavis, T., Hambrusch, S.E., and Rau-Chaplin, A., “Parallelizing the Data Cube”, Proceedings ... Distributed and Parallel Databases, 13(2):181–202, 2003 Märtens, H., Rahm, E., and Stöhr, T., “Dynamic query scheduling in parallel data warehouses”, Concurrency and Computation: Practice and Experience, ... E., and Stöhr, T., “Dynamic Query Scheduling in Parallel Data Warehouses”, Proceedings of Euro-Par, pp 321–331, 2002 Monteiro, A.M.C and Furtado, P., Data Skew-Handling in Parallel MDIM Data...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P13 doc
Ngày tải lên :
26/01/2014, 15:20
... Rau-Chaplin, A., “Parallelizing the Data Cube”, Distributed and Parallel Databases, 11(2):181–201, 2002 Dehne, F., Eavis, T., Hambrusch, S.E., and Rau-Chaplin, A., “Parallelizing the Data Cube”, Proceedings ... Distributed and Parallel Databases, 13(2):181–202, 2003 Märtens, H., Rahm, E., and Stöhr, T., “Dynamic query scheduling in parallel data warehouses”, Concurrency and Computation: Practice and Experience, ... E., and Stöhr, T., “Dynamic Query Scheduling in Parallel Data Warehouses”, Proceedings of Euro-Par, pp 321–331, 2002 Monteiro, A.M.C and Furtado, P., Data Skew-Handling in Parallel MDIM Data...
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báo cáo hóa học:" The HIV-1 Non-subtype B Workgroup: An International Collaboration for the Collection and Analysis of HIV-1 Non-subtype B Data" pot
Ngày tải lên :
20/06/2014, 08:20
... 13 countries The goal of the workgroup is to collect and analyze a robust database of sequences and clinical data to identify similarities and differences among HIV-1 subtypes with respect to ... subtypes.[15] The collected data are intended to be publicly available, and can serve as a reference dataset and as a watch list for resistance surveillance programs and epidemiologic studies (see ... Workgroup We have established an international workgroup for the collection and analysis of RT and protease sequences and data from persons infected with non-B HIV-1 subtypes Currently, the workgroup...
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Book Econometric Analysis of Cross Section and Panel Data By Wooldridge - Chapter 1 pot
Ngày tải lên :
06/07/2014, 08:20
... of full data matrices Because we will rely heavily on random sampling, it is important to know what it allows and what it rules out Random sampling is often reasonable for cross section data, where, ... expectations 1.2 1.2.1 The Stochastic Setting and Asymptotic Analysis Data Structures In order to give proper treatment to modern cross section and panel data methods, we must choose a stochastic ... treat explanatory variables as random for modern econometric analysis We should not confuse the random sampling assumption with so-called experimental data Experimental data fall under the fixed explanatory...
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Research Issues in Systems Analysis and Design, Databases and Software Development phần 1 ppsx
Ngày tải lên :
07/08/2014, 11:22
... sources of data, the data- gathering period, how field interviews and other data were recorded, the description of the analysis process, and finally, how the iterative process between field data and ... capabilities and features of new ideas and concepts in information systems development, databases, and forthcoming technologies Keeping with the high standard of previous volumes in the Advances in Database ... Data Research issues in systems analysis and design, databases and software development / Keng Siau, editor p cm Summary: "This book is designed to provide understanding of the capabilities and...
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wiley interscience tools and environments for parallel and distributed computing phần 1 pptx
Ngày tải lên :
13/08/2014, 12:21
... reliability, and cost-effectiveness It outlines parallel and distributed computing approaches and paradigms and the opportunities and challenges of parallel and PREFACE xiii distributed computing Finally, ... processed in parallel and thus Tools and Environments for Parallel and Distributed Computing, Edited by Salim Hariri and Manish Parashar ISBN 0-471-33288-7 Copyright © 2004 John Wiley & Sons, Inc PARALLEL ... Tools and Environments The development of parallel and distributed applications is a nontrivial process and requires a thorough understanding of the application and the architecture Although a parallel...
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Báo cáo sinh học: " Identification of a major gene in F and F data when alleles 1 2 assumed fixed in the parental lines" pps
Ngày tải lên :
14/08/2014, 20:20
... distributions has been proposed when pure line and backcross data as well as F and F data are available, and when parental lines are homozygous i for all loci (Elston and Stewart, 1973; Elston, 1984) Statistical ... Board for Livestock and Meat, the Dutch Pig Herdbook Society, Bovar BV, Euribrid BV, Fomeva BV and the VOC Nieuw-Dalland BV Profs Brascamp and Grossman and Drs Van Arendonk and Van Putten are ... 1/4, 1/2 and 1/4 for r 1, and (or A and , A l I ) A The total number of F individuals is given as n, and the function f is given as: In i G = i [9] G is the r, which Model with = major gene and environment...
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Band 9 task 1 writing and how to insert data
Ngày tải lên :
12/06/2015, 11:21
... education and science in developing and industrialised countries in 1980 and 1990 The three bar charts show average years of schooling, numbers of scientists and technicians, and research and development ... Marriages and divorces The first bar chart shows changes in the number of marriages and divorces in the USA, and the second chart shows figures for the marital status of American adults in 1970 and 2000 ... and homes around the world, and water use in Brazil and the Democratic Republic of Congo It is clear that global water needs rose significantly between 1900 and 2000, and that agriculture accounted...
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