In this paper, we investigate the quadratic approximation methods. After studying the basic idea of simplex methods, we construct several new search directions by combining the local information progressively obtained...In this paper, we investigate the quadratic approximation methods. After studying the basic idea of simplex methods, we construct several new search directions by combining the local information progressively obtained during the iterates of the algorithm to form new subspaces. And the quadratic model is solved in the new subspaces. The motivation is to use the information disclosed by the former steps to construct more promising directions. For most tested problems, the number of functions evaluations have been reduced obviously through our algorithms.展开更多
单纯疱疹病毒1型(herpes simplex virus type 1,HSV-1)通常引起口唇疱疹,但近年来其引发的生殖道疱疹亦越来越多,且与阿尔茨海默病的发生密切相关。HSV-1和HSV-2已经成为全球感染率最高的性传播疾病之一,并显著增加罹患艾滋病及其他生...单纯疱疹病毒1型(herpes simplex virus type 1,HSV-1)通常引起口唇疱疹,但近年来其引发的生殖道疱疹亦越来越多,且与阿尔茨海默病的发生密切相关。HSV-1和HSV-2已经成为全球感染率最高的性传播疾病之一,并显著增加罹患艾滋病及其他生殖道疾病的风险,这些新的流行病学资料改变了过去对HSV的忽视,促使各个国家迫切开始重视针对HSV感染情况的数据收集和开发新的疫苗设计策略。基于全球对HSV感染的新认识和举措,本文将从不同角度分别对世界和国内HSV流行情况作一综述,以期了解HSV近年的感染趋势和传播特点。展开更多
基金This work was partially supported by the Doctoral Foundation of Hebei University(Grant No.Y2006084)the National Natural Science Foundation of China(Grant No.10231060)
文摘In this paper, we investigate the quadratic approximation methods. After studying the basic idea of simplex methods, we construct several new search directions by combining the local information progressively obtained during the iterates of the algorithm to form new subspaces. And the quadratic model is solved in the new subspaces. The motivation is to use the information disclosed by the former steps to construct more promising directions. For most tested problems, the number of functions evaluations have been reduced obviously through our algorithms.
文摘单纯疱疹病毒1型(herpes simplex virus type 1,HSV-1)通常引起口唇疱疹,但近年来其引发的生殖道疱疹亦越来越多,且与阿尔茨海默病的发生密切相关。HSV-1和HSV-2已经成为全球感染率最高的性传播疾病之一,并显著增加罹患艾滋病及其他生殖道疾病的风险,这些新的流行病学资料改变了过去对HSV的忽视,促使各个国家迫切开始重视针对HSV感染情况的数据收集和开发新的疫苗设计策略。基于全球对HSV感染的新认识和举措,本文将从不同角度分别对世界和国内HSV流行情况作一综述,以期了解HSV近年的感染趋势和传播特点。
