an extended assessment of fvt

... presentation of this thesis in many aspects I would like to express my thanks to the collaborators during my Ph.D study, especially Professor Divyakant Agrawal, Professor Wang-Chiew Tan, Dr Bing Tian Dai, ... to a better understanding of the Web table semantics, and may have potentials in many applications, for instance knowledge base augmentation, query answering systems and OLAP analysis It may also ... 2012 An example of non-regular Web table, with row span and column span An example of crosstab, where both rows and columns are table headers...

Ngày tải lên: 10/09/2015, 09:09

... selection and projection on the Cartesian product of P with itself n − times, we can express the coalescing of up to n intervals from P But P can contain an arbitrary number of intervals Meanwhile, ... Advanced SQL Programming Morgan Kaufmann, 1995 [10] S Chandrasekaran and M Franklin Streaming queries over streaming data In VLDB, 2002 [11] J Chen, D J DeWitt, F Tian, and Y Wang NiagaraCQ: A scalable ... insofar as the introduction of a new empl can only expand the set of departments that satisfy this query; however this sum query cannot be expressed without the use of aggregates The problem of...

Ngày tải lên: 23/03/2014, 12:20

... databases:state -of- the-art  [2] Tran Khanh Dang Ensuring correctness, completeness, and freshness for Outsourced Tree-Indexed Data Information Resource Management Journal, 2008  [3] Tran Khanh Dang Security ... Information and Security: An International Journal, ProCon Ltd.,Sofia, Bulgaria, ISSN 1311-1493, Vol 18, 2006, p.85-108  [4] Min Xie, Haixun Wang, Jian Yin, Xiaofeng Meng Integrity Auditing of Outsourced ... câu truy vấn Môn An Toàn Bảo Mật Hệ Thống Thông Tin Demo  Mô hình cài đặt 21 Môn An Toàn Bảo Mật Hệ Thống Thông Tin Tham khảo  [1]Pham Thi Bach Hue, Dang Tran Khanh Query assurance for outsourced...

Ngày tải lên: 29/01/2015, 11:27

... need to identify the list of candidate partitions A partition is a candidate if the range of the ordering dimension of its MBR overlaps the range of the ordering dimension of the tightest hyper-cube ... pairs (r˜3 , B1 ) and (r˜10 , B2 ), where r˜3 and r˜10 are the partial computation of the digests of r3 and r10 respectively Points B1 and B2 are the leftmost and rightmost point of the hyper-sphere ... NNs of each other) and S6 (the NN of p3 is p1 ) There is only one answer for RNN(q) which is p6 in region S5 Now, since both phases of the above scheme consists of a series of NN queries, we can...

Ngày tải lên: 13/10/2015, 15:54

... 40,000 Mar 97 17,000 Requirements change and need managing Modeling    Define the model Use graphical modeling tools Use a tool capable of prototyping  Proof of concept essential  New design ... Sales Summary Summary Office Office Sales Sales Time Time Product Product Time Dimension  Important required dimension   Contains special dates Provides flexible and accurate analysis by time Days ... answers to a query Improve query performance SALES FACTS Sales$ Region Month 10,000 North Jan 97 12,000 South Feb 97 11,000 North Jan 97 15,000 West Mar 97 18,000 South Feb 97 20,000 North Jan...

Ngày tải lên: 25/04/2013, 20:33

... that myCar is an object of class Vehicle You also say that myCar is an instance of Vehicle In this context, instance means an example of or “one of. ” You can also use the word instance as a verb, ... IndexOutOfRangeException was unhandled Index was outside the bounds of the array At first glance, this error message seems imposing However, you can get the gist rather quickly: An IndexOutOfRangeException ... groups of students before they can set out on a life of riches and fame This type of program needs both the class and the array concept rolled into one: arrays of students Through the magic of C#...

Ngày tải lên: 04/10/2013, 21:20

... name Another important benefit of a typed dataset is that any type mismatch is caught during the compilation, rather than at run time Creating a Typed Dataset Manually This is an important section, ... need SqlCommand, and for Microsoft Access, we need OledbCommand Among other tasks, the main jobs of Command are to take the SQL query from the client and pass it to the data source and make a ... with the Microsoft NET Framework Both relational and nonrelational data sources can be accessed using ADO.NET A discussion of the full functionality of ADO.NET is beyond the scope of this book...

Ngày tải lên: 05/10/2013, 08:48

... database Instances 3-6 Standby database Standby database Standby database Standby database Standby database Standby database Standby database Standby database Standby database Instances Copyright ... Benefits of Using Enterprise Manager • Enables you to manage your configuration using a familiar interface and event-management system • Automates and simplifies the complex operations of creating and ... database and take over production processing • Helps you logically define and create a Data Guard configuration consisting of a primary database and a standby database • Enables easy configuration of...

Ngày tải lên: 26/10/2013, 20:15

... disasters and data corruption Many different architectures using RAC and Data Guard are possible depending on the use of local and remote sites and the use of nodes and a combination of logical and ... the standby database A standby database can be one of two types: a physical standby database or a logical standby database If needed, either type of standby database can assume the role of the ... 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 operations...

Ngày tải lên: 26/10/2013, 22:15

... 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 ... at least and at most, as well as less than and more than The product of x and is greater than x×6>2 Ratio A ratio is a comparison of a two quantities measured in the same units It can be symbolized ... age = x and Max’s age = x + To find the average or mean of a set of numbers, add all of the numbers together and divide by the quantity of numbers in the set Average = Lisa made twice as many cookies...

Ngày tải lên: 02/11/2013, 17:20

... uniqueness of the data entered into reach row of a particular column This can be achieved by means of triggers An INSTEAD OF INSERT trigger can be used to replace of the regular action of the INSERT ... transaction would never be terminated We cannot expect only two transactions running at the same time There could be many less important transactions and many important transactions running at the same ... Profiler Note 2: The Index Tuning Wizard can be used to select and create an optimal set of indexes and statistics for a SQL Server 2000 database without requiring an expert understanding of...

Ngày tải lên: 04/11/2013, 16:15

... Hawthorne, W 1053.2 Jiawei Han University of Illinois at Urbana-Champaign Urbana, IL hanj@cs.uiuc.edu Jianyong Wang University of Illinois at Urbana-Champaign Urbana, Z L jianyong @tsinghua.edu.cn ... Wang and Jiong Yang; ISBN: 0-387-24246-5 ADVANCED SIGNATURE INDEXING FOR MULTIMEDIA AND WEB APPLICATIONS, Yannis Manolopoulos, Alexandros Nanopoulos, Eleni Tousidou; ISBN: 1-4020-7425-5 ADVANCES ... over time In many cases, it is desirable to track and analyze the nature of these changes over time In [I, 11, 181, a number of methods have been discussed for change detection of data streams...

Ngày tải lên: 08/11/2013, 02:15

... division of labor between the online statistical data collection component and an offline analytical component Thus, the process provides considerable flexibility to an analyst in a real-time and changing ... calculate the mean and standard deviation3 of the arrival times of points in a given micro-cluster M Let these values be denoted by pM and OM respectively Then, we find the time of arrival of the m/ ... meaningfully defined on all the dimensions because of the sparsity of the data, some subset of the dimensions can always be found on which particular subsets of points form high quality and meaningful...

Ngày tải lên: 08/11/2013, 02:15

... [lo] Dong G., Han J., Lakshmanan L V S., Pei J., Wang H and Yu P S (2003) Online mining of changesfrom data streams: Research problems and preliminary results, In Proceedings of the 2003 ACM ... the set of test instances could arrive in the form of a data stream and can be classified efficiently on demand At the same time, the summary statistics (and therefore training model) can be efficiently ... tree can grow till the algorithm runs out of memory This results in a number of issues related to effective maintenance of the tree Efficiency and Accuracy: This is an inherent characteristic of...

Ngày tải lên: 08/11/2013, 02:15

... MULTI-DIMENSIONAL ANALYSIS OF DATA STREAMS USING STREAM CUBES Jiawei an, ' Y Dora Cai,' Yixin Chen,2 Guozhu W ah,' and Jianyong wang5 on^: Jian ~ e i ? Benjamin 'university of Illinois, Urbana, Illinois (hanj, ... change in the data It has 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 ... field of data stream analysis is change detection and monitoring In many cases, the data stream can show changes over time which can be used for understanding the nature of several applications...

Ngày tải lên: 15/12/2013, 13:15

... maintains statistics on the sum and sum -of- squares of the aggregate values of tuples that it processes, allowing the estimation of the mean and standard deviation of the values of the attribute being ... the context of data cube) is called a cell Given three distinct cells cl, c2 and c3, cl is an ancestor of c2, and c2 a descendant of cl iff on every dimensional attribute, either cl and c2 share ... the layer that an analyst takes as an observation deck, watching the changes of the current stream data by examining the slope of changes at this layer to make decisions The layer can be obtained...

Ngày tải lên: 15/12/2013, 13:15

... answers instead of ending with an aggregation operator In the case of set-valued queries, an approximate answer consists of a random sample of the tuples in the output set The metric of relative ... the contents of the current active window For a window of size N, we can show that there are a large number of possible input instances, i.e arrangements of 0's and 1's' such that any deterministic ... (L,4) 'log g1arrangements of 0's and 1's of length N such that any deterministic algorithmfor BASICwith COUNTING relative error less than must dzferentiate between any two of the arrangements To...

Ngày tải lên: 15/12/2013, 13:15

... distribution of the sketch provides much stronger results than just the use of mean and variance of the sketch components We note that the use of only mean and variance of the sketch components often ... method of random projection, we can reduce a data point of dimensionality d to an axis system of dimensionality k by picking k random vectors of dimensionality d and calculating the dot product of ... constant probability which is at least 718 This constant probability can be tightened to at least - (for any small value of 6) with the use of the median of O(log(l/S)) independent copies of these...

Ngày tải lên: 15/12/2013, 13:15

... CQL semantics In the remainder of this chapter, we shall assume this semantics and ignore the issue of deletions in the output stream < The semantics of Relaxations and Variations of the Standard ... research Model and Semantics Basic Model and Semantics A stream is an unbounded sequence of stream tuples of the form (s,t) ordered by t, where s is a relational tuple and t is the timestamp of the stream ... [71] Manku G., Rajagopalan S, Lindsay B (1998) Approximate medians and other quantiles in one pass and with limited memory ACM SIGMOD Conference [72] Manku G., Rajagopalan S, Lindsay B (1999) Random...

Ngày tải lên: 15/12/2013, 13:15

... the other Many such possibilities exist For example, methods and insights from the wellstudied problems of answering query using views [26] and view selection [14] could be extended and applied ... existence of a Gamma Ray Burst If we know the duration of the shower, we can maintain a count on the total number of events over sliding windows of the known window size and raise an alarm when ... are important from an application point of view, such as deviant aggregates, interesting patterns, and trend correlations, are presented 3.1 Monitoring an aggregate query In this class of queries,...

Ngày tải lên: 15/12/2013, 13:15