...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Theoretical Biology >On moment closures for population dynamics in continuous space
【24h】

On moment closures for population dynamics in continuous space

机译：关于连续空间中人口动态的矩封闭

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A first-order moment closure, the mean-field assumption that organisms encounter one another in proportion to their spatial average densities, lies at the heart of much theoretical ecology. This assumption ignores all spatial information and, at the very least, needs to be replaced by a second-order closure to gain understanding of ecological dynamics in spatially structured populations. We describe a number of conditions that a second-order closure should satisfy and use these conditions to evaluate some closures currently available in the literature. Two conditions are particularly helpful in discriminating among the alternatives: that the closure should be positive, and that the dynamics should be unaltered when identical individuals are given different labels. On this basis, a class of closures we refer to as 'power-2' turns out to provide a good compromise between positivity and dynamical invariance under relabellina. (C) 2004 Elsevier Ltd. All rights reserved.
机译：一阶矩闭合是有机体与其空间平均密度成正比的平均场假设，它是许多理论生态学的核心。这个假设忽略了所有空间信息，至少需要用二阶封闭代替，以了解空间结构种群的生态动态。我们描述了二阶闭包应满足的许多条件，并使用这些条件来评估文献中当前可用的一些闭包。区分备选方案时，有两个条件特别有用：封闭应该是肯定的，并且当相同的个体被赋予不同的标签时，动态应该保持不变。在此基础上，我们称之为“幂2”的一类闭包被证明在重新标记下的正性和动态不变性之间提供了很好的折衷方案。 （C）2004 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号