Tuesday Mar 29, 2011

How to Deploy an Oracle Data Miner 11gR2 Workflow Model

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Tuesday Mar 22, 2011

OpenWorld 2011 Call for Papers: Deadline March 27

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Thursday Dec 09, 2010

Oracle Data Mining a Star Schema: Telco Churn Case Study

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Sunday Oct 31, 2010

Effective Hypertensive Treatment using Oracle Data Mining in Saudi Arabia

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Wednesday Oct 27, 2010

Missed Oracle Open World 2010? Visit the Virtual Collateral Rack

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Wednesday Aug 25, 2010

The Meaning of Probability

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Thursday Jul 15, 2010

Oracle Data Miner 11g Release 2 Update: Now Extension to SQL Developer

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Thursday May 27, 2010

New R Interface to Oracle Data Mining Available for Download

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Tuesday Apr 06, 2010

More details on America's Cup use of Oracle Data Mining

Updated (Sept. 10, 2010) Full Article http://www.sail-world.com/USA/Americas-Cup:-Oracle-Data-Mining-supports-crew-and-BMW-ORACLE-Racing/68834

Related articles/blogs:  

BMW Oracle Racing's America's Cup: A Victory for Database Technology

Americas Cup victory.jpgBMW Oracle Racing's victory in the 33rd America's Cup yacht race in February showcased the crew's extraordinary sailing expertise. But to hear them talk, the real stars weren't actually human. "The story of this race is in the technology," says Ian Burns, design coordinator for BMW Oracle Racing.

Gathering and Mining Sailing Data
From the drag-resistant hull to its 23-story wing sail, the BMW Oracle USA trimaran is a technological marvel. But to learn to sail it well, the crew needed to review enormous amounts of reliable data every time they took the boat for a test run. Burns and his team collected performance data from 250 sensors throughout the trimaran at the rate of 10 times per second. An hour of sailing alone generates 90 million data points.

BMW Oracle Racing turned to Oracle Data Mining in Oracle Database 11g to extract maximum value from the data. Burns and his team reviewed and shared raw data with crew members daily using a Web application built in Oracle Application Express (Oracle APEX).

"Someone would say, 'Wouldn't it be great if we could look at some new combination of numbers?' We could quickly build an Oracle Application Express application and share the information during the same meeting," says Burns.

Analyzing Wind and Other Environmental Conditions
Burns then streamed the data to the Oracle Austin Data Center, where a dedicated team tackled deeper analysis. Because the data was collected in an Oracle Database, the Data Center team could dive straight into the analytics problems without having to do any extract, transform, and load processes or data conversion. And the many advanced data mining algorithms in Oracle Data Mining allowed the analytics team to build vital performance analytics. For example, the technology team could remove masking elements such as environmental conditions to give accurate data on the best mast rotation for certain wind conditions.

Without the data mining, Burns says the boat wouldn't have run as fast. "The design of the boat was important, but once you've got it designed, the whole race is down to how the guys can use it," he says. "With Oracle database technology we could compare the incremental improvements in our performance from the first day of sailing to the very last day. With data mining we could check data against the things we saw, and we could find things that weren't otherwise easily observable and findable."

Monday Mar 08, 2010

OpenWorld 2010 Call for Presentations is Now Open

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Wednesday Feb 24, 2010

Oracle Recognized as a Leader in Data Mining

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Thursday Feb 18, 2010

Oracle Data Mining Races with America's Cup

Oracle Data Mining was used by the performance analysis team of the BMW/Oracle Racing team in their preparation to win the America's Cup race off the coast of Spain.
BMW Oracle America Cup logo.jpg

The America's Cup has been away from U.S. shores for 15 years, the longest drought since 1851.  With the challenge of squeezing out every micro-joule of energy from the wind and with the goal of maximizing "velocity made good", the BMW Oracle Racing Team turned to Oracle Data Mining. 

"Imagine standing under an avalanche of data - 2500 variables, 10 times per second and a sailing team demanding answers to design and sailing variations immediately. This was the challenge facing the BMW ORACLE Racing Performance Analysis Team every sailing day as they refined and improved their giant 90 foot wide, 115 foot long trimaran sporting the largest hard-sail wing ever made. Using ORACLE DATA MINING accessing an ORACLE DATABASE and presenting results real time using ORACLE APPLICATION EXPRESS the performance team managed to provide the information required to optimise the giant multihull to the point that it not only beat the reigning America's Cup champions Alinghi in their giant Catamaran but resoundingly crushed them in a power display of high speed sailing. After two races - and two massive winning margins - the America's Cup was heading back to America - a triumph for the team, ORACLE and American technology."
--Ian Burns, Performance Director, BMW ORACLE Racing Team

America Cup Boat Blog pic.jpg

Visit the http://www.sail-world.com/USA/Americas-Cup:-Oracle-Data-Mining-supports-crew-and-BMW-ORACLE-Racing/68834 for pictures, videos and full information.

Wednesday Feb 10, 2010

Funny YouTube video that features Oracle Data Mining

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Sunday Feb 07, 2010

Get Ready for the New Oracle Data Miner 11gR2 GUI!

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Friday Jan 29, 2010

Generating cluster names from a document clustering model

Text mining is a hot topic, especially for document clustering. Say you have a potentially large set of documents that you'd like to sort into some number of related groups. Sometimes it is enough to know which documents are in the same group (or cluster) and be able to assign new documents to the existing set of groups. However, you may also want a description of the clusters to help understand what types of documents are in those clusters. Automatically generating cluster names would be much easier than examining cluster centroids or reading a sample of documents in each cluster.

Oracle Data Mining supports this use case and below is a script that generates cluster names from a clustering model.

To use this script, you first need a clustering model and a text mapping table. These are easily produced using the Oracle Data Miner graphical user interface to automatically transform the data and then build the model. To get started, provide a data table with two columns: a numeric id column and a VARCHAR2 column containing the document text.

Here are a few key screen captures to guide you. I'm using a dataset from Oracle Open World that includes all the session text (title and abstract concatenated). By the way, this session document clustering was part of the process for producing the Session Recommendation Engine for Oracle Open World 2008 and 2009.

In Oracle Data Miner, start a build activity for clustering using k-Means. Then, select the dataset and the unique identifier, and click Next. (Click images to enlarge.)

ClusterNames 001.jpg

Check the SESSION_TEXT attributes as "input" and change the "mining type" to "text."

ClusterNames 002.jpg

Click advanced settings at the end of the wizard to reveal settings you can tailor. Since we have a single TEXT column, click on the tabs for "Outlier Treatment," "Missing Values," and "Normalize" and disable each step by clicking the box in the upper left-hand corner. Whereas these are often necessary for k-Means, our single text column and text transformation eliminate the need these.

Clicking the "Text" tab, you may specify various text-specific settings. For example, you may have a custom stopword list or lexer that you want to use, as shown below.

ClusterNames 003.jpg

Clicking the "Feature Extraction" sub-tab allows you to specify maximum number of terms to represent each document and the maximum number of terms to represent all documents.

ClusterNames 004.jpg

Click the "Build" tab to specify the number of clusters (groups) you want to have. For text, we recommend the "cosine" distance function. Depending on your needs, you may want to specify the split criterion to "size" to have clusters of more equal size. For a better model, set maximum interactions to 20.

ClusterNames 005.jpg

Oracle Data Miner now generates an activity that performs the text transformation and model building.

ClusterNames 006.jpg

To obtain the model name from the Build step, copy the text next to "Model Name." To obtain the mapping table, click the "Output Data" link under the Text step. Click the "Mapping Data" link and copy the name of the table at the top of the window.

ClusterNames 007.jpg

Now, you're nearly ready to invoke the following script to generate the cluster names.

Create a table like CLUSTER_NAME_MAP below to store the results. Then, replace the model name used below ('SESSION09_PRE92765_CL') with your model name, and the mapping table name used below (DM4J$VSESSION09_710479489) with your mapping table name.

create table cluster_name_map (model_name   VARCHAR(40),

                               cluster_name VARCHAR2(1999),

                               cluster_id   NUMBER,

                               record_count NUMBER);


Run this script on your model and table. Look below to see some sample output from the Open World session data. (Note that some columns are included in the script below, even though not required, to highlight data available in the model.)


  CURSOR ClusterLeafIds IS

    --Obtain leaf clusters


    FROM (

      SELECT distinct clus.ID AS CLUSTER_ID,

             clus.RECORD_COUNT RECORD_COUNT,

             clus.DISPERSION DISPERSION,

             clus.PARENT PARENT_CLUSTER_ID,

             clus.TREE_LEVEL TREE_LEVEL,

             CASE WHEN chl.id IS NULL THEN 'YES'

                                      ELSE 'NO' END IS_LEAF

       FROM (SELECT *

             FROM TABLE(dbms_data_mining.get_model_details_km('SESSION09_PRE92765_CL'))) clus,

                table(clus.child) chl


    WHERE is_leaf='YES'

    ORDER BY cluster_id;


  FOR c IN ClusterLeafIds LOOP

    INSERT INTO cluster_name_map (model_name, cluster_name,

                                  cluster_id, record_count)

    SELECT 'SESSION09_PRE92765_CL' model_name, cluster_name,

            c.cluster_id cluster_id, c.record_count record_count

    FROM (

      SELECT id, term || '-' ||

           LEAD(term, 1) OVER (ORDER BY id) || '-' ||

           LEAD(term, 2) OVER (ORDER BY id) || '-' ||

           LEAD(term, 3) OVER (ORDER BY id) || '-' ||

           LEAD(term, 4) OVER (ORDER BY id) cluster_name

      FROM (  

       SELECT id, text term, centroid_mean

       FROM (

        SELECT rownum id, a.*

        FROM (

             SELECT cd.attribute_subname  term,

                    cd.mean               centroid_mean

             FROM (

               SELECT *

               FROM TABLE(dbms_data_mining.get_model_details_km('SESSION09_PRE92765_CL',  c.cluster_id, null, 1, 0, 0, null)) ) a,

               TABLE(a.centroid) cd

             order by cd.mean desc) a

        WHERE rownum < 6) x,

        DM4J$VSESSION09_710479489 y

      WHERE x.term=y.attribute_id

      ORDER BY centroid_mean



    WHERE id=1;




Each cluster name is the concatenation of the top 5 terms (words with the highest ranking centroid values) that represent the cluster. The the image below, the second column is the cluster id, and the third column is the count of documents assigned to that cluster.

ClusterNames 008.jpg

Cluster names can also be assigned to the model clusters directly in the model.

Assigning cluster names and the advanced SQL in the script will be covered in future blog posts.


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