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朱经纬 《中山大学学报论丛》2007,27(8):297-299
扩散过程作为一个重要的近似模型,其研究无论在理论上还是在实践中均具有重要意义。主要对在一定的条件下,N-维扩散过程样本像集的Hausdorff维数、Hausdorff测度以及相关一些概率性质进行了讨论。 相似文献
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To overcome the default of single search tendency, the ants in the colony are divided into several sub-groups. The ants in different subgroups have different trail information and expectation coefficients. The simulated annealing method is introduced to the algorithm. Through setting the temperature changing with the iterations, after each turn of tours, the solution set obtained by the ants is taken as the candidate set. The update set is obtained by adding the solutions in the candidate set to the previous update set with the probability determined by the temperature. The solutions in the candidate set are used to update the trail information. In each turn of updating, the current best solution is also used to enhance the trail information on the current best route. The trail information is reset when the algorithm is in stagnation state. The computer experiments demonstrate that the proposed algorithm has higher stability and convergence speed. 相似文献
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地方政府融资平台是由政府为发起主体,利用多种手段融资投入市政建设、公用事业。地方政府融资平台作为经济发展和应对金融危机的重要手段,在刺激我国经济回升中起到了不可或缺的作用。但其在运行中出现许多问题,已形成多种风险隐患,如不重视必将后患无穷。需要通过多种防范措施规避风险,以保障其健康运营,促使其继续为我国经济发展做出贡献。 相似文献
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A new algorithm is presented by using the ant colony algorithm based on genetic method (ACG) to solve the continuous optimization problem.Each component has a seed set.The seed in the set has the value of component,trail information and fitness.The ant chooses a seed from the seed set with the possibility determined by trail information and fitness of the seed.The genetic method is used to form new solutions from the solutions got by the ants.Best solutions are selected to update the seeds in the sets and trail information of the seeds.In updating the trail information,a diffusion function is used to achieve the diffuseness of trail information.The new algorithm is tested with 8 different benchmark functions. 相似文献
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朱经纬 《全国优秀作文选(高中)》2005,(Z1)
如果不小心,鞋子里的一粒沙子也会影响我们走路。在我们走向成功的路上,常常会遇到各式各样的困难,有的难度系数大,我们能严阵以待,而有的微乎其微,我们往往会认为这成不了气候,其实我们错了。事实上,正是那些我们认为微不足道的小失误,蛀穿了成功的大坝。 相似文献
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