Permutationally invariant polynomial representation of polarizability tensor surfaces for linear regression analysis
Permutationally invariant polynomial representation of polarizability tensor surfaces for linear regression analysis
复制标题
用于线性回归分析的极化张量表面的置换不变多项式表示
DOI:
10.1002/jcc.26952
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发表时间:
2022
影响因子:
3
通讯作者:
Kaledin, Alexey L.
中科院分区:
文献类型:
--
作者:
Omodemi, Oluwaseun;Kaledin, Martina;Kaledin, Alexey L.
A linearly parameterized functional form for a Cartesian representation of molecular dipole polarizability tensor surfaces (PTS) is described. The proposed expression for the PTS is a linearization of the recently reported power series ansatz of the original Applequist model, which by construction is non‐linear in parameter space. This new approach possesses (i) a unique solution to the least‐squares fitting problem; (ii) a low level of the computational complexity of the resulting linear regression procedure, comparable to those of the potential energy and dipole moment surfaces; and (iii) a competitive level of accuracy compared to the non‐linear PTS model. Calculations of CH4PTS, with polarizabilities fitted to 9000 training set points with the energies up to 14,000 cm−1show an impressive level of accuracy of the linear PTS model obtained with ~1600 parameters: ~1% versus 0.3% RMSE for the non‐linear vs. linear model on a test set of 1000 configurations.
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DOI:
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发表时间:
2020
期刊:
影响因子:
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作者:
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影响因子:
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DOI:
10.1021/acs.jpclett.1c03152
发表时间:
2021
期刊:
The journal of physical chemistry letters
影响因子:
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作者:
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通讯作者:
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