Torsional random walk statistics on lattices using convolution on crystallographic motion groups.
Torsional random walk statistics on lattices using convolution on crystallographic motion groups.
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使用晶体运动群卷积的晶格扭转随机游走统计。
DOI:
10.1016/j.polymer.2007.01.066
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发表时间:
2007
期刊:
影响因子:
4.6
通讯作者:
Chirikjian,GregoryS
中科院分区:
文献类型:
--
作者:
Skliros,Aris;Chirikjian,GregoryS
This paper presents a new algorithm for generating the conformational statistics of lattice polymer models. The inputs to the algorithm are the distributions of poses (positions and orientations) of reference frames attached to sequentially proximal bonds in the chain as it undergoes all possible torsional motions in the lattice. If z denotes the number of discrete torsional motions allowable around each of the n bonds, our method generates the probability distribution in end-to-end pose corresponding to all of the znindependent lattice conformations in O(nD+1) arithmetic operations for lattices in D-dimensional space. This is achieved by dividing the chain into short segments and performing multiple generalized convolutions of the pose distribution functions for each segment. The convolution is performed with respect to the crystallographic space group for the lattice on which the chain is defined. The formulation is modified to include the effects of obstacles (excluded volumes) and to calculate the frequency of the occurrence of each conformation when the effects of pairwise conformational energy are included. In the latter case (which is for three dimensional lattices only) the computational cost is O(z4n4). This polynomial complexity is a vast improvement over the O(zn) exponential complexity associated with the brute-force enumeration of all conformations. The distribution of end-to-end distances and average radius of gyration are calculated easily once the pose distribution for the full chain is found. The method is demonstrated with square, hexagonal, cubic and tetrahedral lattices.
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DOI:
--
发表时间:
1975
期刊:
影响因子:
--
作者:
F. T. Wall;F. Mandel
通讯作者:
F. Mandel
DOI:
10.1039/ft9959102369
发表时间:
1995
期刊:
Journal of the Chemical Society, Faraday Transactions
影响因子:
--
作者:
M. Müller;K. Binder;W. Oed
通讯作者:
W. Oed
影响因子:
4.4
作者:
W. Mattice;K. Sienicki
通讯作者:
K. Sienicki
影响因子:
4.4
作者:
ALEXANDR.Z
通讯作者:
ALEXANDR.Z
影响因子:
5.5
作者:
A. Sariban;K. Binder
通讯作者:
K. Binder