منابع مشابه
A Derivation A = > Derivation Tree Derivation A = > Derivation Tree
The basic Schema Theorem for genetic algorithms is modiied for a grammatically-based learning system. A context-free grammar is used to deene a language in which each sentence is mapped to a tness value. The derivation trees associated with these sentences are used to deene the structure of schemata. The eeect of crossover and mutation on schemata is described. A schema theorem is developed whi...
متن کاملHeart rate variability in healthy subjects: effect of age and the derivation of normal ranges for tests of autonomic function.
The diagnosis of autonomic neuropathy frequently depends on results of tests which elicit reflex changes in heart rate. Few well-documented normal ranges are available for these tests. The present study was designed to investigate the effect of age upon heart rate variability at rest and in response to a single deep breath, the Valsalva manoeuvre, and standing. A computerised method of measurem...
متن کاملHeart rate variability in healthy subjects: effect of age and derivation of normal ranges for tests of autonomic function.
Correspondence Heart rate variability in healthy subjects: effect of age and derivation of normal ranges for tests of antonomic function Sir, The study on the effect of age on heart rate variability in normal subjects by O'Brien et al (1986;55: 34854)1 deserves comment. (a) The confidence limits obtained are lower than in previous studies. This is attributed to the larger number and more unifor...
متن کاملJordan derivation on trivial extension
Let A be a unital R-algebra and M be a unital A-bimodule. It is shown that every Jordan derivation of the trivial extension of A by M, under some conditions, is the sum of a derivation and an antiderivation.
متن کاملDerivation of turbulent energy of fiber suspensions
The energy equation for turbulent flow of fiber suspensions was derived in terms of second order correlation tensors. Fiber motion of turbulent energy including the correlation between pressure fluctuations and velocity fluctuations was discussed at two points of flow field, at which the correlation tensors were the functions of space coordinates, distance between two points, and time.
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ژورنال
عنوان ژورنال: Linear Algebra and its Applications
سال: 1998
ISSN: 0024-3795
DOI: 10.1016/s0024-3795(98)00018-4