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使用遗传算法解决MTSP问题的一种新的染色体设计 被引量:11
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作者 欧阳杰平 《舰船电子工程》 2006年第3期107-109,共3页
多旅行商问题(Multiple Traveling Salesperson Problem,简称MTSP)讨论的是如何安排m(>1)位旅行商访问n(>m)座城市,要求每个城市只允许被访问一次时,求解所有旅行商花费的费用和是最小(或最大)的问题。MTSP问题其实与单旅行商问题... 多旅行商问题(Multiple Traveling Salesperson Problem,简称MTSP)讨论的是如何安排m(>1)位旅行商访问n(>m)座城市,要求每个城市只允许被访问一次时,求解所有旅行商花费的费用和是最小(或最大)的问题。MTSP问题其实与单旅行商问题(Traveling Salesperson Problem,简称TSP)相似,但是由于添加了任何城市只要被某一旅行商访问到即可这个附加条件,因而增加了问题复杂度。在以前使用遗传算法(GA)研究解决MTSP问题时,通常采用标准的TSP染色体和处理方法。现为解决MTSP问题给出了一种新的染色体设计和相关的处理方法,并与以往的理论设计和计算性能进行比较。计算测试显示,新的方法能够获得较小的查找空间,在许多方面,新的方法产生的解空间更好。 展开更多
关键词 MISP 遗传算法 染色体
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Myocardial infarction secondary prevention study (MISPS) 被引量:14
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作者 Hongcai SHANG Guohua DAI Junhua HANG Yaozu XIANG Yang WANG Junping ZHANG Wuxun DU Jingyuan MAO Chen YAO Weiliang WENG Tiancai WEN Boli ZHANG 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2006年第2期116-119,共4页
Background Traditional Chinese medicine (TCM), especially herbal medicine, has been widely used in China and now is also being increasingly used in other countries for the treatment of cardiovascular diseases. Althoug... Background Traditional Chinese medicine (TCM), especially herbal medicine, has been widely used in China and now is also being increasingly used in other countries for the treatment of cardiovascular diseases. Although many studies have demonstrated that certain Chinese herbal products are effective and safe for the treatment of cardiovascular diseases, most of these lack sufficient quality. Therefore, large randomized clinical trials and further scientific research to determine its safety, effectiveness are necessary.QiShen YiQi Dripping Pills (QSYQDP) is a herbal preparation clinically used in the treatment and prevention of coronary artery disease. Preliminary observations have shown its safety and effectiveness. Methods/Design This randomized, controlled trial will recruit 3600 patients with a history of myocardial infarction. Patients will be randomized into two groups by a Centr-Randomized System. One group receives QSYQDP, the other group receive aspirin. This trial protocol will describe eligibility criteria, detailed information on the treatment definition, blinding, endpoints, statistical methods, sample size determination, data management, legal aspects, and the current status of the trial. Discussion This trial is one of the first randomized, controlled clinical trial to evaluate the efficacy and safety of traditional Chinese herbal medicine in the treatment and secondary prevention of coronary artery disease. The results of this study should help to define the role of TCM in modern medical care, as well as to provide the management strategy for CAD patients in China and other countries. 展开更多
关键词 Myocardial infarction secondary prevention study MISPS MACE
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