Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Data Structure Articles
Page 122 of 164
What are the data mining interfaces?
Data mining is the process of finding useful new correlations, patterns, and trends by transferring through a high amount of data saved in repositories, using pattern recognition technologies including statistical and mathematical techniques.It is the analysis of factual datasets to discover unsuspected relationships and to summarize the records in novel methods that are both logical and helpful to the data owner.It is the procedure of selection, exploration, and modeling of high quantities of information to find regularities or relations that are at first unknown to obtain clear and beneficial results for the owner of the database.By outsourcing data mining, all ...
Read MoreWhat are the features of OLAP Servers?
There are various features of OLAP Servers which are as follows −Multidimensional conceptual view − A user view of the enterprise data is multidimensional. The conceptual view of OLAP models should be multidimensional. The multidimensional models can be manipulated more easily and intuitively than in the case of single-dimensional models.Transparency − A user should be able to get full value from an OLAP engine without regarding the source of the data. The OLAP system’s technology, underlying database, and computing architecture, and the heterogeneity of input data sources should be transparent to users to preserve their productivity and proficiency with familiar ...
Read MoreHow query operations can be improved by cascading the operations?
It is the process that manages the queries and speeds them up by directing queries to the most effective data source. This process also ensures that all the system resources are used most effectively, usually by scheduling the execution of queries. The query management process monitors the actual query profiles that are used to determine which aggregations to generate.This process services at all times that the data warehouse is created accessible to end-users. There are no major consecutive steps within this process, rather there are a set of facilities that are constantly in operations.OLAP is an element of software technology ...
Read MoreWhat are the OLAP tools in data mining?
There are three main categories of OLAP tools which are as follows −MOLAP − MOLAP represents Multidimensional OLAP. It supports tuples as the data storage unit. The MOLAP applies a dedicated n-dimensional array storage engine and OLAP middleware to handle data. Hence, OLAP queries are completed through direct addressing to the associated multidimensional views (data cubes).This structure focuses on the pre-computation of the transactional information into the aggregations, which results in fast query execution performance. Particularly, MOLAP pre-computes and stores aggregated measures at each hierarchy level at load time, and stores and indexes these values for immediate retrieval.The full pre-computation ...
Read MoreWhat is OLAP?
OLAP stands for On-Line Analytical Processing. OLAP is an element of software technology that authorizes analysts, managers, and executives to gain insight into data through fast, consistent, interactive access in a wide variety of possible views of information that has been changed from raw information to reflect the actual dimensionality of the enterprise as learned by the client.OLAP allows the users to generate online descriptive or comparative summaries of data and other analytics queries. It designates an element of software and technologies that allows the collection, storage manipulation, and reproduction of multidimensional records with the aim of analysis.It allows the ...
Read MoreWhat is the Query management process?
It is the process that manages the queries and speeds them up by directing queries to the most effective data source. This process also ensures that all the system resources are used most effectively, usually by scheduling the execution of queries. The query management process monitors the actual query profiles that are used to determine which aggregations to generate.This process operates at all times that the data warehouse is made available to endusers. There are no major consecutive steps within this process, rather there are a set of facilities that are constantly in operations.Directing queries − Data warehouses that contain ...
Read MoreWhat is Backpropagation Algorithm?
Backpropagation defines the whole process encompassing both the calculation of the gradient and its need in the stochastic gradient descent. Technically, backpropagation is used to calculate the gradient of the error of the network concerning the network’s modifiable weights.The characteristics of Backpropagation are the iterative, recursive and effective approach through which it computes the updated weight to increase the network until it is not able to implement the service for which it is being trained. Derivatives of the activation service to be known at network design time are needed for Backpropagation.Backpropagation is widely used in neural network training and calculates ...
Read MoreWhat is the difference between feed-forward and feedback systems in data mining?
Feed-forward networkFeed-forward neural networks enable signals to travel one method only, from input to output. There is no feedback (loops) i.e., the output of any layer does not affect that same layer. Feed-forward networks influence to be easy networks that relate inputs with outputs. They are extensively used in pattern recognition. This type of organization is also defined as bottom-up or top-down.Feed-forward neural networks enable signals to travel one method only, from input to output. There is no feedback (loops) i.e., the output of any layer does not affect that same layer. Feed-forward networks influence to be easy networks that ...
Read MoreHow the neural network is useful in classification?
A neural network is a sequence of algorithms that endeavors to identify basic relationships in a set of data through a process that mimics the approach the human brain works. In this method, neural networks define systems of neurons, either organic or artificial.Neural Networks are analytic techniques modeled after the (hypothesized) processes of learning in the cognitive system and the neurological functions of the brain and capable of predicting new observations (on specific variables) from other observations after implementing a process of so-called learning from existing information. Neural Networks is one of the Data Mining techniques.A neural network is an ...
Read MoreWhat are the mining multidimensional association rules from relational databases and data warehouses?
Association rule learning is a type of unsupervised learning technique that tests for the dependency of one data element on another data element and maps accordingly so that it can be more commercial. It tries to discover some interesting relations or associations between the variables of the dataset. It depends on several rules to find interesting relations among variables in the database.The association rule learning is the essential concept of machine learning, and it is employed in Market Basket analysis, Web usage mining, continuous production, etc. Therefore market basket analysis is an approach used by several big retailers to find ...
Read More