...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Oceanographic Literature Review >Methods and management
【24h】

Methods and management

机译：方法与管理

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

Markov chain analysis was recently proposed to assess the time scales and preferential pathways into biological or physical networks by computing residence time, first passage time, rates of transfer between nodes and number of passages in a node. We propose to adapt an algorithm already published for simple systems to physical systems described with a high resolution hydrodynamic model. The method is applied to bays and estuaries on the Eastern Coast of Canada for their interest in shellfish aquaculture. Current velocities have been computed by using a 2 dimensional grid of elements and circulation patterns were summarized by averaging Eulerian flows between adjacent elements. Flows and volumes allow computing probabilities of transition between elements and to assess the average time needed by virtual particles to move from one element to another, the rate of transfer between two elements, and the average residence time of each system. We also combined transfer rates and times to assess the main pathways of virtual particles released in farmed areas and the potential influence of farmed areas on other areas. We suggest that Markov chain is complementary to other sets of ecological indicators proposed to analyse the interactions between farmed areas - e.g., depletion index, carrying capacity assessment. Markov chain has several advantages with respect to the estimation of connectivity between pair of sites. It makes possible to estimate transfer rates and times at once in a very quick and efficient way, without the need to perform long term simulations of particle or tracer concentration.
机译：最近提出了马尔可夫链分析，以通过计算停留时间，首次通过时间，节点之间的转移速率以及节点中通过的次数来评估进入生物或物理网络的时间尺度和优先路径。我们建议将已经针对简单系统发布的算法改编为以高分辨率流体力学模型描述的物理系统。该方法被应用于加拿大东部沿海的海湾和河口，因为他们对贝类水产养殖感兴趣。通过使用元素的二维网格计算当前速度，并通过平均相邻元素之间的欧拉流来总结循环模式。流量和体积允许计算元素之间转换的概率，并评估虚拟粒子从一个元素移动到另一个元素所需的平均时间，两个元素之间的转移速率以及每个系统的平均停留时间。我们还结合了传输速率和时间来评估在耕地中释放的虚拟颗粒的主要途径以及耕地对其他地​​区的潜在影响。我们建议将马尔可夫链与为分析耕地之间的相互作用而提出的其他生态指标集互补-例如，消耗指数，承载力评估。关于估计站点对之间的连通性，马尔可夫链具有多个优势。它使得可以以非常快速和有效的方式一次估算传输速率和时间，而无需执行粒子或示踪剂浓度的长期模拟。

著录项

  • 来源
    《Oceanographic Literature Review》 |2016年第2期|408-412|共5页
  • 作者

  • 作者单位
  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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