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Database Articles
Page 152 of 547
What is an Attribute?
An attribute is a data field, defining a characteristic of a data object. The nouns attribute, dimension, feature, and variable are used correspondently in the literature. The dimension is generally used in data warehousing. Machine learning literature influence to use the term feature, while statisticians prefer the method svariable.Data mining and database experts generally use the term attribute. Attributes defining a user object can include, for instance, customer ID, name, and address. Observed values for a given attribute are referred to as observations.A set of attributes can define a given object is known as attribute vector (or feature vector). The ...
Read MoreWhat are the different aspects of mining methodology?
There are various aspects of mining methodology which are as follows −Mining various and new kinds of knowledge − Data mining covers a broad spectrum of data analysis and knowledge discovery services, from data characterization and discrimination to relations and correlation analysis, classification, regression, clustering, outlier methods, sequence methods, and trend and computational analysis.These services can use the same database in multiple ways and need the development of several data mining techniques. Because of the diversity of software, new mining services continue to emerge, developing data mining a powerful and fast-increasing field.For instance, for effective knowledge discovery in data networks, ...
Read MoreHow is the derived model presented in data mining?
Classification is the procedure of discovering a model that defines and categorize data classes or concepts. The model are based on the search of a set of training data (i.e., data objects for which the class labels are famous). The model can predict the class label of objects for which the class label is anonymous.The derived model can be represented in several forms, including classification rules (i.e., IF-THEN rules), decision trees, numerical formulae, or neural networks. A decision tree is a flowchart-like tree architecture, where each node indicates a test on an attribute value, each branch defines an outcome of ...
Read MoreHow can these principles help protect customers from companies that collect personal client data?
One solution is for such companies to support consumers with several opt-out choices, enabling consumers to describe limitations on the use of their personal information, such asThe consumer’s personal data are not to be utilized at all for data mining.The consumer’s data can be used for data mining, but the identity of each consumer or some data that can lead to the disclosure of a person’s identity should be deleted.The data can be used for in-house mining only.The data can be used in-house and externally as well.Furthermore, companies can support consumers with positive consent, i.e., by enabling consumers to opt ...
Read MoreWhat is Visual and Audio Data Mining?
Visual data mining finds implicit and beneficial knowledge from huge data sets using data and knowledge visualization methods. The human visual system is managed by the eyes and brain, the latter of which can be think of as a dynamic, largely parallel processing and reasoning engine including a huge knowledge base.Visual data mining can be considered as a unification of two disciplines such as data visualization and data mining. It can also associated with computer graphics, multimedia systems, human computer interaction, pattern identification, and highperformance computing.In general, data visualization and data mining can be integrated in the following ways −Data ...
Read MoreWhat is the theoretical foundations of Data Mining?
There are several theories for the basis of data mining include the following −Data reduction − In this theory, the basis of data mining is to reduce the data representation. Data reduction trades certainty for speed in response to the need to obtain fast approximate answers to queries on huge databases.Data reduction methods include singular value decomposition (the driving component behind principal components analysis), wavelets, regression, log-linear models, histograms, clustering, sampling, and the development of index trees.Data compression − According to this theory, the basis of data mining is to compress the given information by encoding in terms of bits, ...
Read MoreWhat is Web usage mining?
Web usage mining is used to derive useful data, information, knowledge from the weblog data, and helps in identifying the user access designs for web pages.In Mining, the management of web resources, the individual is thinking about data of requests of visitors of a website that are composed as web server logs. While the content and mechanism of the set of web pages follow the intentions of the authors of the pages, the single requests shows how the users view these pages. Web usage mining can disclose relationships that were not suggested by the designer of the pages.A web server ...
Read MoreHow can we use hub pages to find authoritative pages?
A hub is a set of Web pages that supports sets of links to authorities. Hub pages cannot be prominent, or there can exist some links pointing to them; however, they supports links to a set of prominent sites on a general topic.Such pages can be lists of recommended connections on single home pages, including recommended reference sites from a course home page, or professionally massed resource documents on commercial sites. Hub pages play an essential role of implicitly conferring authorities on a targeted topic.In general, a good hub is a page that points to several good authorities; a good ...
Read MoreWhat is Document Clustering Analysis?
Document clustering is the important techniques for organizing files in an unsupervised manner. When documents are represented as term vectors, the clustering methods can be applied. The document space is continually of large dimensionality, ranging from various hundreds to thousands.Due to the curse of dimensionality, it makes sense to first project the documents into a lowerdimensional subspace in which the semantic structure of the document space becomes clear. In the low-dimensional semantic areas, the traditional clustering algorithms can be used.There are several methods of document clustering analysis is as follows −Spectral clustering − The spectral clustering method first performs spectral ...
Read MoreHow can automated document classification be performed?
Automated document classification is an essential text mining service because the existence of a tremendous number of on-line files, it is endless yet important to be able to automatically organize such records into classes to support document retrieval and sucessive analysis.Document classification has been used in automated topic tagging (i.e., assigning labels to documents), topic directory construction, and identification of the document writing styles and defining the goals of hyperlinks related to a set of documents.A general procedure is as follows − First, a group of preclassified files is taken as the training set. The training set is analyzed to ...
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