noise imperfections and error correction
Effective interpretation, integration and querying of web tables
Ngày tải lên :
10/09/2015, 09:09
... the Web list Raghavan and Garcia-Molina [63] and Wu et al [81] present techniques for accessing the data hidden under Web forms, in order to better understand the form design and semantics of the ... lot across browsers, and change with different versions of CSS and HTML Towards Web-scale table extraction, the work in [13, 12, 52] uses a mixture of hand-written rules and statistical classifiers ... us an opportunity to build a valuable knowledge base and make it usable and queryable for ordinary users In this work, we aim to propose and implement a holistic Web table processing framework...
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Query Languages and Data Models for Database Sequences and Data Streams doc
Ngày tải lên :
23/03/2014, 12:20
... takes new tuples and a current state and output new tuples and a modified state and pass, prop, keep are three behavior functions that take punctuation marks and state as input and returns additional ... etc.) always return a sequence of length one and they are all nonmonotonic, and therefore blocking Continuous count and sum are monotonic and nonblocking, and thus suitable for continuous queries ... equivalent defines the two queries pUq and coalscp, the first on P and Q and the second on P only We will refer to them as the coalesce query and the until query, and observe that they are monotonic...
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![[new] ensuring query correctness and completeness for outsourced databases](https://media.store123doc.com/images/document/2015_01/29/medium_oyb1422505634.jpg)
[new] ensuring query correctness and completeness for outsourced databases
Ngày tải lên :
29/01/2015, 11:27
... completeness, and freshness for Outsourced Tree-Indexed Data Information Resource Management Journal, 2008 [3] Tran Khanh Dang Security Protocols for Outsourcing Database Services Information and Security: ... Thông Tin Xác suất Tính đủ Minxie đảm bảo tính đủ cho loại truy vấn Tiếp cận ngẫu nhiên (Random Approach) Tiếp cận xác định (Determistic) 14 Môn An Toàn Bảo Mật Hệ Thống Thông Tin Xác ... truyền liệu Tính Đủ Narasimha Tsudik đề nghị hướng tiếp cận gọi Digital Signature Aggregation and Chaining (DSAC) Môn An Toàn Bảo Mật Hệ Thống Thông Tin Cấu Trúc Dữ Liệu Chứng Thực (AuthDS)...
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Query authentication and processing on outsourced databases
Ngày tải lên :
13/10/2015, 15:54
... (i.e., the box that bounds r13 and r14 ) is within the partition, we return the values of r13 and r14 and the digest of the various dimensions for r11 , r12 , r15 , r16 and r17 We now present the ... computes its digest and checks whether s−1 (sig(pi )) = h(g(pi−1 )|g(pi )|g(pi+1 )) To achieve tighter security, h0 (xir ) can be redefined as h0 (xir |rand(pi )) where rand(pi ) is a random number ... certain points can be hidden in a similar way as we handle window queries (e.g., p1 , p5 and p8 ) and range queries (e.g., p2 ) For points like p3 and p7 it becomes more challenging However, the same...
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Data Warehouse Architecture and Models
Ngày tải lên :
25/04/2013, 20:33
... Differentiate between an enterprise-wide data warehouse and localized data marts Recognize the difference between independent and dependent data marts Identify the data that is stored in ... Explain the features of each type of data by examining where and why it is used List the data models that may already exist in a company and describe where they may be useful to the warehouse model ... entities, attributes, and relationships Re-engineer the source data Design the database Integrate the model into the warehouse architecture repository Review with client and revise Oracle...
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Collecting Data — The Class and the Array
Ngày tải lên :
04/10/2013, 21:20
... object ᮣ Assigning and using object references ᮣ Creating and building arrays of objects Y ou can freely declare and use all the intrinsic data types — such as int, double, and bool — to store ... dTopSpeed, nWeight, and bClunker I address the stop and go parts in Chapters and Because the class is so central to C# programming, the chapters in Part IV of this book spelunk the ins and outs of classes ... application handles students, each with his or her own name, rank (grade point average), and serial number Logically, the student’s name may be a string, the grade point average could be a double, and...
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Data Models, Datasets, and the ADO.NET Interface
Ngày tải lên :
05/10/2013, 08:48
... object, Command objects also differ for each data provider In the case of SQL Server, we need SqlCommand, and for Microsoft Access, we need OledbCommand Among other tasks, the main jobs of Command are ... reader and populate into dataset cmdReport.CommandType = CommandType.Text; cmdReport.Connection = conReport; cmdReport.CommandText = "Select * FROM CreditLimit"; //read data from command object ... Security=SSPI;"; //declare Connection, command and other related objects SqlConnection conReport = new SqlConnection(cnString); SqlCommand cmdReport = new SqlCommand(); SqlDataReader drReport; DataSet...
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3 Using Data Guard Broker and Enterprise Manager
Ngày tải lên :
26/10/2013, 20:15
... Primary database Instances 3-6 Standby database Standby database Standby database Standby database Standby database Standby database Standby database Standby database Standby database Instances Copyright ... interface or command-line interface Data Guard Configuration Standby site Standby site Standby site Primary site Configuration files Archived redo logs Configuration files Standby database Primary ... creating and managing standby databases • Command-line interface (CLI): – Started by entering DGMGRL at the command prompt where the Oracle server is installed – Enables you to control and monitor...
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Oracle Data Guard Concepts and Administration
Ngày tải lên :
26/10/2013, 22:15
... Standby Local Physical Standby and Cascaded Remote Logical Standby Local and Remote Physical Standby and Cascaded Local Logical Standby Consolidated Reporting with Cascaded Logical Standby ... primary and standby databases and instances, create or add existing standby databases, start and stop instances, monitor instance performance, view events, schedule jobs, and perform backup and recovery ... the use of local and remote sites and the use of nodes and a combination of logical and physical standby databases See Appendix B, "Data Guard and Real Application Clusters" and Oracle High Availability...
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Data Analysis, Statistics, and Probability
Ngày tải lên :
02/11/2013, 17:20
... some red and some green candies has a total of 60 candies in it The ratio of the number of green to red candies is 7:8 How many of each color are there in the bag? The sum of a number x and four ... 15x 60 ᎏ ᎏ = ᎏᎏ 15 15 x=4 Therefore, there are 7x = (7)(4) = 28 green candies and 8x = (8)(4) = 32 red candies Mean, Median, and Mode Examples Max is three years older than Ricky Unknown = Ricky’s ... something about its value From the problem, it is known that and share a multiple and that the sum of their product is 60 Therefore, you can write and solve the following equation: 7x + 8x = 60 15x =...
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Designing and Implementing Databases with Microsoft SQL Server 2000 Enterprise Edition
Ngày tải lên :
04/11/2013, 16:15
... queries and determine which indexes should be created on a table and to select and create an optimal set of indexes and statistics for a SQL Server 2000 database without requiring an expert understanding ... transaction that inserts the employee name and address information to check for this error, and specifying that the transaction should restart if this error is encountered, would cause the transaction ... until either it completes without errors and COMMIT TRANSACTION is issued to make the modifications a permanent part of the database, or errors are encountered and all modifications are erased...
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Data Streams Models and Algorithms- P1
Ngày tải lên :
08/11/2013, 02:15
... students and researchers It is hoped that this book will provide a reference to students, researchers and practitioners in both introducing the topic of data streams and understanding the practical and ... Technology, Human Factors, and Policy, edited by William J Mclver, Jr and Ahrned K Elrnagarrnid; ISBN: 14020-7067-5 INFORMATION AND DATABASE QUALITY, Mario Piattini, Coral Calero and Marcela Genero; ... Streams: A Micro-clustering Approach 4.1 On-Demand Stream Classification Other Applications of Micro-clustering and Research Directions Performance Study and Experimental Results Discussion References...
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Data Streams Models and Algorithms- P2
Ngày tải lên :
08/11/2013, 02:15
... environments with limited bandwidth such as sensor networks and handheld devices Thus knowledge structure representation is an important issue After extracting models and patterns locally from ... general data mining and exploration applications Performance Study and Experimental Results All of our experiments are conducted on a PC with Intel Pentium I11 processor and 12 MB memory, which ... destination (and vice versa), percentile of connections that have "SYN" errors, the number of "root" accesses, etc As in 1231, all 34 continuous attributes will be used for clustering and one outlier...
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Data Streams Models and Algorithms- P3
Ngày tải lên :
08/11/2013, 02:15
... classification error rate The error rate is calculated by measuring the difference between the error rate during the training at one hand and the error rate during the model validation at the other hand ... STREAMS: MODELS AND ALGORITHMS On Demand Classification Aggarwal et al have adopted the idea of micro-clusters introduced in CluStream [2] in On-Demand classification in [3] The on-demand classification ... Demand Classification of Data Streams, Proc 2004 Int Con$ on Knowledge Discovery and Data Mining (KDD '04), Seattle, WA [4] Babcock B., Babu S., Datar M., Motwani R., and Widom J (2002) Models and...
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Tài liệu Data Streams Models and Algorithms- P4 doc
Ngày tải lên :
15/12/2013, 13:15
... and whose counts are less than An item whose counts exceeds is called Hierarchy Heavy Hitter (HHH), and we want to find all HHHs in a data stream They have presented both deterministic and randomized ... time was reversed and the data stream arrived in reverse order, starting at t ht and ending at t Examples of the forward and reverse density profiles are illustrated in Figures 5.1 and 5.2 respectively ... been shown in [2], that this process can be performed in an efficient and effective way, and can identify both expanding and contracting communities On the Effect of Evolution in Data Mining...
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Tài liệu Data Streams Models and Algorithms- P5 docx
Ngày tải lên :
15/12/2013, 13:15
... response, and both space and time are critical in processing, we examine both time and space consumption In our study, besides presenting the total time and memory taken to compute and store ... both the time dimension and the other dimensions Since it takes a much smaller amount of space and time to handle regression measures in a multi-dimensional space than handling the stream data ... computation time, and flexibility, and has both quick aggregation time and query answering time The remaining of the paper is organized as follows In Section 2, we define the basic concepts and introduce...
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Tài liệu Data Streams Models and Algorithms- P6 pdf
Ngày tải lên :
15/12/2013, 13:15
... studied by Das, Gehrke and Riedwald [6] and Kang, Naughton and Viglas [16] This further motivates the need to maintain various statistics over sliding windows, using small space and update time This ... merging buckets i and i - 1, and Si,i-1 (Si,i-1 = Si Si-1) denote the size of this bucket We maintain the following two invariants that guarantee a small relative error E in estimation and small number ... ComputationModel and Results 163 References and Related Work The EH technique, that we demonstrate through solutions to the BASICCOUNTING SUM and problem, is by Datar, Gionis, Indyk and Motwani [8]...
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Tài liệu Data Streams Models and Algorithms- P7 ppt
Ngày tải lên :
15/12/2013, 13:15
... non-euclidean and relative error with the use of wavelet synopses This includes metrics such as the Lp error or the relative error Both the works of [65] and [55] were obtained independently and at ... to minimizing specific error criteria Two such metrics are the minimization of the mean square error or the maximum error metric The mean square error minimizes the L2 error in approximation ... coefficients, whereas maximum error metrics minimize the maximum error of any coefficient Another related metric is the relative maximum error which normalizes the maximum error with the absolute coefficient...
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Tài liệu Data Streams Models and Algorithms- P8 doc
Ngày tải lên :
15/12/2013, 13:15
... sensors, which is slower and less reliable The resulting distribution has a higher variance and looser bounds, and lags slightly behind that of S1 To correlate measurements from S1 and S2by time, we ... Streams: Minimizing Non-Euclidean Error ACM KDD Conference [56] Guha S., Koudas N (2002) Approximating a Data Stream for Querying and Estimation: Algorithms and Performance Evaluation ICDE Conference ... Stable Distributions, Pseudorandom Generators, Embeddings, and Data Stream Computation, IEEE FOCS [63] Jagadish H., Koudas N., Muthukrishnan S., Poosala V., Sevcik K., and Sue1 T (1998) Optimal...
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Tài liệu Data Streams Models and Algorithms- P9 doc
Ngày tải lên :
15/12/2013, 13:15
... STREAMS:MODELS AND ALGORITHMS Introduction Raw stream data, such as faults and alarms generatedby network traffic monitors and log records generated by web servers, are almost always at low level and too ... H Kriegel, R Schneider, and B Seeger The R*-tree: An efficient and robust access method for points and rectangles In SIGMOD, pages 322-33 1,1990 [6] J Bentley, B Weide, and A Yao Optimal expected ... Keogh and T Folias Time Series Data Mining Archive In http://www.cs.ucr:edu/"eamonn/TSDMA, 2002 [I 91 Y Law, H Wang, and C Zaniolo Query languages and data models for database sequences and data...
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