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Image Recognition and Parameter Analysis of Concrete Vibration State Based on Support Vector Machine

Image Recognition and Parameter Analysis of Concrete Vibration State Based on Support Vector Machine

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VB/MM--the validity of the underlying approximations.

Avital Sharir-Ivry¹, Avital Shurki

¹Department of Medicinal Chemistry and Natural Products, The Lise Meitner-Minerva Center for Computational Quantum Chemistry, School of Pharmacy, The Hebrew University of Jerusalem, Jerusalem, Israel.

The Journal of Physical Chemistry. B

|September 5, 2008

Summary

This study evaluates approximations in VB/MM and DE-VB/MM methods for analyzing reactions in biological environments. The approximations are generally accurate, with minimal impact on energetics, making VB/MM a suitable initial choice.

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Image Recognition and Parameter Analysis of Concrete Vibration State Based on Support Vector Machine

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Published on: January 5, 2024

Area of Science:

Computational Chemistry
Quantum Mechanics
Biochemistry

Background:

Valence Bond (VB) and Molecular Mechanics (MM) methods are combined to study reactions in biological systems.
VB/MM and DE-VB/MM are two such hybrid methods employing approximations for environmental interactions.

Purpose of the Study:

To rigorously examine the approximations used in VB/MM and DE-VB/MM methods.
To assess the impact of these approximations on calculations of overlap and resonance integrals, wave functions, and energetics.

Main Methods:

Numerical examination of approximations in VB/MM and DE-VB/MM.
Calculation of accurate and approximated overlap and reduced resonance integrals.
Testing on systems with electrostatic interactions: CH3F and LiF dissociation, and S N2 reaction.

Main Results:

The approximations in VB/MM and DE-VB/MM are generally accurate for electrostatic environments.
Deviations occur when significant changes in the wave function are expected.
The impact of approximations on absolute energies, wave functions, and overall energetics is minimal.

Conclusions:

VB/MM and DE-VB/MM provide reliable analysis for reactions in large biological environments.
The approximations are validated, particularly for systems dominated by electrostatic interactions.
VB/MM is recommended as a primary method due to its broader application of approximations.