In this work, we analyzed the impact of interventions on populations which exhibit unimodal dynamics. The six landmarks that characterize the “shape” of the unimodal reproduction curve f ( x ) of the difference equa...In this work, we analyzed the impact of interventions on populations which exhibit unimodal dynamics. The six landmarks that characterize the “shape” of the unimodal reproduction curve f ( x ) of the difference equation, X n+1 = f ( X n )?, are defined and used in order to examine and determine the behavior of dynamics of populations. By using the Li-Yorke criterion for determination of chaos we propose a qualitative intervention rule that can be applied without any explicit population equation. This proposed strategy for intervention brings out many interesting behaviors in population dynamics. A qualitative decision rule can be applied with a straight edge without any population equation and therefore offers a robust strategy for the management of populations.展开更多
在传统的图像描述生成任务中,已有方法对图像的描述仅仅停留在浅层,并缺乏真实世界知识的指导,难以挖掘出对象在特定背景下的逻辑语义关系。新闻文本的引入为图像描述带来了新的可能,同时对模型的学习能力有了更高要求;此外,新闻图集中...在传统的图像描述生成任务中,已有方法对图像的描述仅仅停留在浅层,并缺乏真实世界知识的指导,难以挖掘出对象在特定背景下的逻辑语义关系。新闻文本的引入为图像描述带来了新的可能,同时对模型的学习能力有了更高要求;此外,新闻图集中往往存在多幅图像,且相互之间联系紧密,导致现有单图描述生成方法不适用于新闻图集描述生成。针对上述问题,本文提出了一种基于图文双向引导注意力(image and text bidirectional guidance attention,ITBGA)的新闻图集描述方法,以图集作为研究对象,并辅以对应的新闻文本作为背景知识,基于ITBGA分别实现粗、细两个粒度的跨模态信息交互,并通过指针网络辅助命名实体词生成。在本文构建的新闻图集数据集上进行了实验验证,结果表明ITBGA能有效提升描述文本的质量,在关键的CIDEr指标上达到了最优。展开更多
For the N-parameter d-dimensional Generalized Brownian Sheet (in short G. B. S.) satisfying some conditions, this paper proves that when 2N≤αd, with probability one, E∈B(R_+~N), there holds 2/βdim E+2N-2Nβ/α≤d...For the N-parameter d-dimensional Generalized Brownian Sheet (in short G. B. S.) satisfying some conditions, this paper proves that when 2N≤αd, with probability one, E∈B(R_+~N), there holds 2/βdim E+2N-2Nβ/α≤dim (E)≤2/αdim E. Especially when α=β=1, we have dim (E)=2 dim E. Noting that even if α=β=1, the G. B. S. is wider than the Brownian Sheet, thus we have extended the uniform dimension result of Mountford, T,S.展开更多
文摘In this work, we analyzed the impact of interventions on populations which exhibit unimodal dynamics. The six landmarks that characterize the “shape” of the unimodal reproduction curve f ( x ) of the difference equation, X n+1 = f ( X n )?, are defined and used in order to examine and determine the behavior of dynamics of populations. By using the Li-Yorke criterion for determination of chaos we propose a qualitative intervention rule that can be applied without any explicit population equation. This proposed strategy for intervention brings out many interesting behaviors in population dynamics. A qualitative decision rule can be applied with a straight edge without any population equation and therefore offers a robust strategy for the management of populations.
文摘在传统的图像描述生成任务中,已有方法对图像的描述仅仅停留在浅层,并缺乏真实世界知识的指导,难以挖掘出对象在特定背景下的逻辑语义关系。新闻文本的引入为图像描述带来了新的可能,同时对模型的学习能力有了更高要求;此外,新闻图集中往往存在多幅图像,且相互之间联系紧密,导致现有单图描述生成方法不适用于新闻图集描述生成。针对上述问题,本文提出了一种基于图文双向引导注意力(image and text bidirectional guidance attention,ITBGA)的新闻图集描述方法,以图集作为研究对象,并辅以对应的新闻文本作为背景知识,基于ITBGA分别实现粗、细两个粒度的跨模态信息交互,并通过指针网络辅助命名实体词生成。在本文构建的新闻图集数据集上进行了实验验证,结果表明ITBGA能有效提升描述文本的质量,在关键的CIDEr指标上达到了最优。
基金Supported by the National Natural Science Foundation of China
文摘For the N-parameter d-dimensional Generalized Brownian Sheet (in short G. B. S.) satisfying some conditions, this paper proves that when 2N≤αd, with probability one, E∈B(R_+~N), there holds 2/βdim E+2N-2Nβ/α≤dim (E)≤2/αdim E. Especially when α=β=1, we have dim (E)=2 dim E. Noting that even if α=β=1, the G. B. S. is wider than the Brownian Sheet, thus we have extended the uniform dimension result of Mountford, T,S.
