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  2. Decision table - Wikipedia

    en.wikipedia.org/wiki/Decision_table

    Decision table. Decision tables are a concise visual representation for specifying which actions to perform depending on given conditions. Decision table is the term used for a Control table or State-transition table in the field of Business process modeling; they are usually formatted as the transpose of the way they are formatted in Software ...

  3. Overdetermined system - Wikipedia

    en.wikipedia.org/wiki/Overdetermined_system

    Any system of linear equations can be written as a matrix equation. The previous system of equations (in Diagram #1) can be written as follows: [] [] = [] Notice that the rows of the coefficient matrix (corresponding to equations) outnumber the columns (corresponding to unknowns), meaning that the system is overdetermined.

  4. Non-negative matrix factorization - Wikipedia

    en.wikipedia.org/wiki/Non-negative_matrix...

    The factorization is not unique: A matrix and its inverse can be used to transform the two factorization matrices by, e.g., [ 53 ] W B B − 1. If the two new matrices W ~ = and H ~ − 1 are non-negative they form another parametrization of the factorization. The non-negativity of W ~ and H ~ applies at least if B is a non-negative monomial ...

  5. Contingency table - Wikipedia

    en.wikipedia.org/wiki/Contingency_table

    In statistics, a contingency table (also known as a cross tabulation or crosstab) is a type of table in a matrix format that displays the multivariate frequency distribution of the variables. They are heavily used in survey research, business intelligence, engineering, and scientific research. They provide a basic picture of the interrelation ...

  6. Weighted sum model - Wikipedia

    en.wikipedia.org/wiki/Weighted_Sum_Model

    Weighted sum model. In decision theory, the weighted sum model (WSM), [1][2] also called weighted linear combination (WLC) [3] or simple additive weighting (SAW), [4] is the best known and simplest multi-criteria decision analysis (MCDA) / multi-criteria decision making method for evaluating a number of alternatives in terms of a number of ...

  7. Box–Behnken design - Wikipedia

    en.wikipedia.org/wiki/Box–Behnken_design

    In each block, a certain number of factors are put through all combinations for the factorial design, while the other factors are kept at the central values. For instance, the Box–Behnken design for 3 factors involves three blocks, in each of which 2 factors are varied through the 4 possible combinations of high and low.

  8. Linear combination - Wikipedia

    en.wikipedia.org/wiki/Linear_combination

    In mathematics, a linear combination or superposition is an expression constructed from a set of terms by multiplying each term by a constant and adding the results (e.g. a linear combination of x and y would be any expression of the form ax + by, where a and b are constants).

  9. Efficient frontier - Wikipedia

    en.wikipedia.org/wiki/Efficient_frontier

    With a risk-free asset, the straight capital allocation lineis the efficient frontier. In modern portfolio theory, the efficient frontier(or portfolio frontier) is an investment portfoliowhich occupies the "efficient" parts of the risk–return spectrum. Formally, it is the set of portfolios which satisfy the condition that no other portfolio ...