4,714 research outputs found
Multidimensional replica-exchange method for free-energy calculations
We have developed a new simulation algorithm for free-energy calculations.
The method is a multidimensional extension of the replica-exchange method.
While pairs of replicas with different temperatures are exchanged during the
simulation in the original replica-exchange method, pairs of replicas with
different temperatures and/or different parameters of the potential energy are
exchanged in the new algorithm. This greatly enhances the sampling of the
conformational space and allows accurate calculations of free energy in a wide
temperature range from a single simulation run, using the weighted histogram
analysis method.Comment: 13 pages, (ReVTeX), 9 figures. J. Chem. Phys. 113 (2000), in pres
Generalized-ensemble simulations of spin systems and protein systems
In complex systems such as spin systems and protein systems, conventional
simulations in the canonical ensemble will get trapped in states of energy
local minima. We employ the generalized-ensemble algorithms in order to
overcome this multiple-minima problem. Three well-known generalized-ensemble
algorithms, namely, multicanonical algorithm, simulated tempering, and
replica-exchange method, are described. We then present three new
generalized-ensemble algorithms based on the combinations of the three methods.
Effectiveness of the new methods are tested with a Potts model and protein
systems.Comment: 12 pages, (LaTeX2e), 6 figures, Computer Physics Communications, in
pres
Simplified expression of shielded MR head response for double-layerperpendicular medium
科研費報告書収録論文(課題番号:09355012・基盤研究(A)(2)・H9~H11/研究代表者:中村, 慶久/垂直ハード磁気ディスク装置を用いる超大容量ストレージシステムの研究
- …