debris
发表于 2025-3-25 03:46:09
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notification
发表于 2025-3-25 08:44:06
,Hierarchical Space—Time Dynamic Models,he electronic structure of the system. In the field of quantum chemistry, other semi-empirical methods, such as MNDO (modified neglect of differential overlap), also exist. These are, in their nature, very similar to Hartree–Fock methods, but the computations of the Hamiltonian and overlap matrix elements are based on semi-empirical formulae.
acrophobia
发表于 2025-3-25 12:50:19
Textbook 2018Latest editionling to calculate the physical and chemical properties by solving a many-body Schroedinger equation with Coulomb forces. For the exchange-correlation term, the local density approximation is usually applied. After the introduction of the first principles treatment, tight-binding and classical potent
招惹
发表于 2025-3-25 19:22:28
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别名
发表于 2025-3-25 20:15:10
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Classify
发表于 2025-3-26 01:26:14
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overreach
发表于 2025-3-26 07:46:49
Ab Initio Methods,nciples” and “ab initio” have been widely used recently. The principal idea of these keywords is to regard many-atom systems as many-body systems composed of electrons and nuclei, and to treat everything on the basis of first principles of quantum mechanics, without introducing any empirical paramet
Simulate
发表于 2025-3-26 09:10:22
Tight-Binding Methods,ted to about a hundred particles. For treating larger systems by molecular dynamics, one can use either tight-binding (TB) or classical molecular- dynamics methods. The TB method has the advantage of being quantum mechanical; therefore one has, in addition to its higher accuracy, information about t
荧光
发表于 2025-3-26 14:36:11
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大猩猩
发表于 2025-3-26 17:38:29
Monte Carlo Methods,sembling. The macroscopic behaviors of such systems are rather different from the microscopic laws in the world of atoms and molecules. For example, in the usual cases of macroscopic systems, the motion of the atoms and molecules can be regarded simply as heat. That is, the average kinetic energy of