为实现DNA计算中对解的有效筛选,防止探针与探针之间的错配、发夹结构等,以及便于检测最终解,提出了改进的三链DNA模型求解0-1规划的设计。该方法编码n个变量的每种组合的所有排列情况。此编码方式不仅使计算所需有效分子量从O((2n)!)下降到O(2nn!),并使对可行解的筛选更加有效。利用寡聚脱氧核苷酸(ODN)在RecA蛋白介导下与同源的双链DNA匹配成三螺旋DNA的特点,可推广到更多以双链DNA分子为计算模型的解的检测中。
To realize the effective screening of solutions in DNA computing and to prevent the mismatch between probes,the formation of the hairpin structure etc,this paper presented an improved triple-stranded DNA model to solve 0-1 integer programming problem.This method made a full array of all combinations of n 0-1 variables.Compared with the original one,the amount of DNA strands needed dropped from O((2n)!) to O(2nn!) and the improved one made a better selection of feasible solutions.Triple-helix structure could be constructed by the homologous double-helix DNA with the oligodeoxyribonucleotides(ODN) in the mediated of RecA protein.It could make use of its special structure to promote it to the selection of solutions with the double-helix computing model.