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**:** 2010
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**:** . . / . 30. .: , 2010. .79-88.

**. :** 0421000023\0030

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** :** , , , -

** (.):** ranging data analysis, structure identification, piecewise approximation of complex dependence, Fisher-Chow statistic

**:** - . , , , .

** (.):** The problem of complex object functioning model development is solved with the aid of algorithms of structure-ranging analysis and piecewise approximation. Two approaches to the solution are considered the first employs iterative algorithms which implement variational approach to piecewise approximation, while the second uses two-phase algorithms where the processes of input parameter space structuring and local regression model development are separated.

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