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  2. File select - Wikipedia

    en.wikipedia.org/wiki/File_select

    This control type allows the user to select files so that their contents may be submitted with a form. The INPUT element is used to create a file select control. It has been noted [ 5 ] that the plural "files" in the above quote is an indication that, in HTML 4.01, a single-file select-control still was supposed to handle selection of multiple ...

  3. Regular expression - Wikipedia

    en.wikipedia.org/wiki/Regular_expression

    Among the first appearances of regular expressions in program form was when Ken Thompson built Kleene's notation into the editor QED as a means to match patterns in text files. [ 9 ] [ 11 ] [ 12 ] [ 13 ] For speed, Thompson implemented regular expression matching by just-in-time compilation (JIT) to IBM 7094 code on the Compatible Time-Sharing ...

  4. List of Ajax frameworks - Wikipedia

    en.wikipedia.org/wiki/List_of_Ajax_frameworks

    A PHP Ajax framework is able to deal with database, search data, and build pages or parts of page and publish the page or return data to the XMLHttpRequest object. Quicknet is an Ajax framework that provides secure data transmission, uses PHP on the server side; Sajax PHP framework with a lot of functions, easy to integrate functions yourself

  5. Lossless join decomposition - Wikipedia

    en.wikipedia.org/wiki/Lossless_join_decomposition

    For example, if we can do a lossless join on a pair of schemas , to form a new schema ,, we use this new schema (rather than or ) to form a lossless join with another schema (which may already be joined (e.g., ,)).

  6. Barkhausen stability criterion - Wikipedia

    en.wikipedia.org/wiki/Barkhausen_stability_criterion

    It states that if A is the gain of the amplifying element in the circuit and β(jω) is the transfer function of the feedback path, so βA is the loop gain around the feedback loop of the circuit, the circuit will sustain steady-state oscillations only at frequencies for which:

  7. Training, validation, and test data sets - Wikipedia

    en.wikipedia.org/wiki/Training,_validation,_and...

    A training data set is a data set of examples used during the learning process and is used to fit the parameters (e.g., weights) of, for example, a classifier. [9] [10]For classification tasks, a supervised learning algorithm looks at the training data set to determine, or learn, the optimal combinations of variables that will generate a good predictive model. [11]