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| Content Provider | Springer Nature Link |
|---|---|
| Author | Lai, XiangJing Xu, RuChu Huang, WenQi |
| Copyright Year | 2011 |
| Abstract | Based on the work of previous researchers, a new unbiased optimization algorithm—the dynamic lattice searching method with two-phase local search and interior operation (DLS-TPIO) —is proposed in this paper. This algorithm is applied to the optimization of Lennard-Jones (LJ) clusters with N = 2–650, 660, and 665–680. For each case, the putative global minimum reported in the Cambridge Cluster Database (CCD) is successfully found. Furthermore, for LJ$_{533}$ and LJ$_{536}$, the potential energies obtained in this study are superior to the previous best results. In DLS-TPIO, a combination of the interior operation, two-phase local search method and dynamic lattice searching method is adopted. At the initial stage of the optimization, the interior operation reduces the energy of the cluster, and gradually makes the configuration ordered by moving some surface atoms with high potential energy to the interior of the cluster. Meanwhile, the two-phase local search method guides the search to the more promising region of the configuration space. In this way the success rate of the algorithm is significantly increased. At the final stage of the optimization, in order to decrease energy of the cluster further, the positions of surface atoms are further optimized by using the dynamic lattice searching method. In addition, a simple new method to identify the central atom of icosahedral configurations is also presented. DLS-TPIO has higher computing speed and success rates than some well-known unbiased optimization methods in the literature. |
| Starting Page | 985 |
| Ending Page | 991 |
| Page Count | 7 |
| File Format | |
| ISSN | 16747291 |
| Journal | Science in China Series B: Chemistry |
| Volume Number | 54 |
| Issue Number | 6 |
| e-ISSN | 18691870 |
| Language | English |
| Publisher | SP Science China Press |
| Publisher Date | 2011-05-31 |
| Publisher Place | Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | global optimization Lennard-Jones clusters interior operation two-phase local search dynamic lattice searching Chemistry/Food Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry |
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