Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Function algorithm

Recently, the ocean-basin distribution of marine biomass and productivity has been estimated by satellite remote sensing. Ocean color at different wavelengths is determined and used to estimate near-surface phytoplankton chlorophyll concentration. Production is then estimated from chlorophyll using either in situ calibration relationships or from empirical functional algorithms (e.g., Platt and Sathyendranth, 1988 Field et al., 1998). Such studies reveal a tremendous amount of temporal and spatial variability in ocean biological production. [Pg.250]

Bezdek, J. C. Pattern Recognition with Fuzzy Objective Function Algorithms. Plenum Press, New York, 1981. [Pg.295]

The performance of the penalty function algorithm is heavily influenced by the value chosen for a.. The larger the value of o. the better the constraints are satisfied but the slower the rate of convergence. Optimizations with very high values of ct,. encounter severe convergence problems. However, the method is very general and... [Pg.2347]

The electron affinity, which is very small for the Fe atom (0.15 eV), has so far not been reliably calculated. However, even the essentially zero affinity obtained is a tremendous improvement from the uncorrelated value of -2.36 eV. One of the reasons for the small remaining errors is that only simple trial functions were used. In particular, the determinants were constructed from Hartree-Fock orbitals. It is known that the Hartree-Fock wavefunction is usually more accurate for the neutral atom than for negative ion, and we conjecture that the unequal quality of the nodes could have created a bias on the order of the electron affinity, especially when the valence correlation energy is more than 20 eV. One can expect more accurate calculations with improved trial functions, algorithms, and pseudopotentials. [Pg.29]

Turning to the Matsubara harmonic partition function algorithm (2.28)-(2.34) one successively has (Putz, 2009) ... [Pg.81]

With these the coimected correlation function algorithm was provided and checked in details, being at disposition to be implemented in whatever order of semiclassical expansion of the path integral evolution amplitude (3.54) For exemplification, the next section will expose the analytic solution for the second order case. [Pg.130]

Maratos, N. (1978) Exact penalty function algorithms for finite dimensional and control optimization problems, Ph.D. Thesis, University of London. [Pg.484]

The reliable application of the density computation upon the partition function algorithm, see Eqs. (4.43) and (4.44), prescribes the transformation of the obtained quantum result in the quantum statistical counterpart by means of Wick transformation (4.33) supplemented by the trigonometric to h5q)erbolic functions conversions ... [Pg.386]

From the reliability (and risk as well) point of view we are mostly interested in the protection systems. Software implemented within processor units of protection system is quite straightforward and concentrated only to fulfil prescribed functions (algorithm), so there should not be any vacant pieces of code (unused procedures, loops, etc.). It is hardly possible to think about it from the angle of huge interlinked software bundles like banking or communication systems and applied reliability approaches from that kind of industries. [Pg.1295]

Hash Function Algorithms. Hash function algorithms are not considered actual encryption, although they are often used with encryption algorithms. Hash functions are used to verify passwords or digital signatures, to look up a file or a table of data, to store data, to verify e-mail users, to verify... [Pg.459]

Other recently published correlative methods for predicting Tg include the group interaction modeling (GIM) approach of Porter (42), neural networks (43-45), genetic function algorithms (46), the CODESSA (acronym for Comprehensive Descriptors for Structural and Statistical Analysis ) method (47), the energy, volume, mass (EVM) approach (48,49), correlation to the results of semiempirical quantum mechanical calculations of the electronic structure of the monomer (50), and a method that combines a thermodynamic equation-of-state based on lattice fluid theory with group contributions (51). [Pg.3584]

Figure 1. A comparison of I calculated by the various methods. Outwards from the theoretical st function these are positioned in the order (a) modified rirst algorithm (b) unmodifred first algorithm (c) F function algorithm. Figure 1. A comparison of I calculated by the various methods. Outwards from the theoretical st function these are positioned in the order (a) modified rirst algorithm (b) unmodifred first algorithm (c) F function algorithm.
Genetic function algorithms consider not only the presence or absence of a particular property in a regression equation, but also the form of the relationship between the property and biological activity. Linear, spline, Gaussian, and polynomial functions are frequently used. 7 For 3D-QSAR, the genetic partial least-squares method replaces the typical multiple regression calculation of the fitness with a PLS calculation. ... [Pg.193]


See other pages where Function algorithm is mentioned: [Pg.79]    [Pg.397]    [Pg.70]    [Pg.30]    [Pg.246]    [Pg.421]    [Pg.212]    [Pg.134]    [Pg.207]    [Pg.26]    [Pg.337]    [Pg.219]    [Pg.29]    [Pg.29]    [Pg.30]    [Pg.49]    [Pg.444]    [Pg.120]    [Pg.139]    [Pg.221]    [Pg.221]    [Pg.221]    [Pg.4]    [Pg.78]    [Pg.128]   
See also in sourсe #XX -- [ Pg.8 , Pg.9 ]




SEARCH



Algorithm for constructing symmetry-adapted functions

Approaching the Uncertain Function Using Neural Network Algorithm

Classification criterion functions for the adaptive wavelet algorithm

Cost function genetic algorithms

Functional Design of the Control Algorithm

Functional estimation problem algorithm derivation

Genetic algorithm fitness function

Genetic function algorithms, quantitative

Hash function algorithms

Interactive Functions and Algorithms

Penalty function methods algorithm

Regression criterion functions for the adaptive wavelet algorithm

Spherical functions computational algorithm

© 2024 chempedia.info