relational data model example
Tài liệu Activity 4.2: Creating a Logical Data Model ppt
Ngày tải lên :
21/12/2013, 06:16
...
Activity 4.2: Creating a Logical Data
Model
In this activity, you will use the skills learned in this module to define the
relationships within a logical data model and produce a sample ER diagram ... Activity 4.2: Creating a Logical Data Model 19
Exercise 2:
Determining Cardinality and Existence
In this exercise, you will ... activity, you will be able to:
!
Identify relationships between entities.
!
Create a logical data model.
Before You Begin
This activity will take place in small groups with a class discussion...
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Tài liệu NoSQL Database Technology: Post-relational data management for interactive software systems docx
Ngày tải lên :
19/02/2014, 12:20
... their own database
technologies. These “NoSQL” databases, each eschewing the relational data model, are a far
better match for the needs modern interactive software systems.
NOSQL DATABASE ...
Denormalizing
Before storing data in an RDBMS, a schema must be created dening precisely what data can
be stored in the database and the relationships between data elements. Data is decomposed
into ... easier and allows for rapid
changes in the data model. Of course, just about all relational database functionality is lost
in the process (though if the database is sharded, much of the functionality...
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Báo cáo khoa học: "A Flexible Stand-Off Data Model with Query Language for Multi-Level Annotation" ppt
Ngày tải lên :
08/03/2014, 04:22
... associative relations representing e.g.
coreference.
2 The Data Model
We propose a stand-off data model implemented in
XML. The basedata is stored in a simple XML file
1
The current release version ... token queries exactly one basedata element
(i.e. word) or one markable.
3.1 Query Tokens
Basedata elements can be queried by matching reg-
ular expressions. Each basedata query token con-
sists ... of the relations
of their basedata elements.
While it has become common practice to use
the stand-off mechanism to relate several annota-
tion levels to one basedata file, it is also not un-
common...
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Báo cáo khoa học: "Towards A Modular Data Model For Multi-Layer Annotated Corpora" docx
Ngày tải lên :
17/03/2014, 04:20
... exists.
2 Data models
There are three purposes data models can serve.
The first purpose is context suitability. A data
model used for this purpose must reflect as well
as possible the data the user ... low
level data storage model rather than a high level
annotation data model.
A high level query language is necessary to get a
good user acceptance and to achieve independence
from lower level data models ... anno-
tated multi-modal data. NXT is based on the NITE
Object Model (NOM) which is an extension of the
XML data model. NOM features a similar separa-
tion of tiers as the PACE-Ling data model, but is
more...
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A relational SQL Example
Ngày tải lên :
29/09/2013, 09:20
... LOCATION_ID
8.1 Relational Database Analysis
Relational database analysis is a process whereby you identify and classify into groups the
information you need to store in a database. In addition, ... three options as to how you use the
database:
ã Use the database strictly as a relational database storing information in
tables.
ã Use tables to store your data and use object views and INSTEAD ... book covers option one, relational SQL.
Chapter 8. A Relational SQL Example
Before starting down the path on how to use JDBC with Data Definition Language (DDL) to create
database objects such...
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An Object-Relational SQL Example
Ngày tải lên :
29/09/2013, 09:20
...
can transform our relational model from that shown in Chapter 8 into an object model. We'll then
look at how we can transform our relational database into an object database by implementing ... Oracle
database objects. So let's start our journey into object -relational SQL with an
overview of Oracle's object -relational technology.
Chapter 14. An Object -Relational SQL Example ... five entities and create object views to present our relational database as
an object -relational database. Seeing that we are now looking at the data from an object
perspective, we have two ways...
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Indexing XML Data Stored in a Relational Database pot
Ngày tải lên :
07/03/2014, 14:20
... the relational data model in the general case. XML data
is hierarchical and may have a recursive structure;
relational databases provide weak support for hierarchical
data (modeled as foreign ... XML data and a mapping of XML
data between the relational and XML forms.
The XML data model, however, has characteristics
that make it very hard if not practically impossible to map
to the relational ... platform for the XML data model
and serves as the basis for interoperability
between relational and XML data. Whereas
query processing on XML data shredded into one
or more relational tables...
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APPLICATION OF THE STIRLING MODEL TO ASSESS DIVERSITY USING UIS CINEMA DATA docx
Ngày tải lên :
07/03/2014, 15:20
... diversity in the film industry based on the UNESCO
database and on an original methodology.
This section highlights some proposals for improving the database. This report stresses
the importance ... that prepare more ambitious
products.
3.2 Improvement to the initial model
i) Dealing with demand
The Stirling model focuses on the production side only, which is probably due to the ... language, geographical origin and genre of films).
Given the lack of statistical data on the genres of films in the UIS Database, this last form
of categorization had to be discounted.
A 333...
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Báo cáo khoa học: "Intelligent Selection of Language Model Training Data" ppt
Ngày tải lên :
07/03/2014, 22:20
... language
models, for each sentence of the text
source used to produce the latter language
model. We show that this produces better
language models, trained on less data, than
both random data selection ... language model a separate feature function in
the overall translation model.
The normal practice when using multiple lan-
guages models in machine translation seems to be
to train models on as much data ... between the language model from that data
source and the desired application output by intel-
ligently selecting a subset of the available data as
language model training data. This not only pro-
duces...
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Báo cáo khoa học: "A DOM Tree Alignment Model for Mining Parallel Data from the Web" doc
Ngày tải lên :
08/03/2014, 02:21
... the DOM tree alignment model, sen-
tence alignment model, and candidate web page
pair verification model are introduced.
4 DOM Tree Alignment Model
The Document Object Model (DOM) is an appli-
cation ... web parallel data mining
scheme is presented. Three component technolo-
gies, the DOM tree alignment model, the sen-
tence aligner, and the candidate parallel page
verification model are presented ... parallel data available on the web have been
an important knowledge source for machine
translation. For example, Hong Kong Laws, an
English-Chinese Parallel corpus released by Lin-
guistic Data...
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Data Mining Classification: Basic Concepts, Decision Trees, and Model Evaluation Lecture Notes for Chapter 4 Introduction to Data Mining pptx
Ngày tải lên :
15/03/2014, 09:20
... the database to
gather count matrix and compute its
Gini index
–
Computationally Inefficient!
Repetition of work.
© Tan,Steinbach, Kumar Introduction to Data Mining 12
Apply Model to Test Data
Refund
MarSt
TaxInc
YES
NO
NO
NO
Yes ... Tan,Steinbach, Kumar Introduction to Data Mining 3
Illustrating Classification Task
© Tan,Steinbach, Kumar Introduction to Data Mining 13
Apply Model to Test Data
Refund
MarSt
TaxInc
YES
NO
NO
NO
Yes ... Attributes
Training Data
Model: Decision Tree
© Tan,Steinbach, Kumar Introduction to Data Mining 8
Decision Tree Classification Task
Decision
Tree
© Tan,Steinbach, Kumar Introduction to Data Mining...
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Báo cáo " On the detection of gross errors in digital terrain model source data " pdf
Ngày tải lên :
22/03/2014, 12:20
... Basedonthetestresults,theauthorshavemadeconclusionsaboutthereliability
andeffectivenessofthemethodfordetectinggrosserrorsinDTMsource data.
Keywords:Digitalterrain model (DTM);
DTMsource data; Grosserrordetection;Interpolation.
1.Introduction
*
Sinceitsorigin inthe late 1950s,the Digital
Terrain Model ... in DTM source
data can be detected by comparing the
measured height of a DTM data point with an
estimated height
by interpolation from
neighboring data points. This ...
Onthedetectionofgrosserrors
indigitalterrain model source data
TranQuocBinh*
CollegeofScience,VNU
Received10October2007;receivedinrevisedform03December2007
Abstract. Nowadays, digital terrain models (DTM)...
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