Results 61 to 70 of about 5,173,671 (208)
Zhejiang Daxue xuebao. Lixue banIt is worth focusing on the development trend, spatial pattern, and multi-scale effects of digital technology innovation which is the core engine driving the development of the digital economy.
李云霞(LI Yunxia) +2 more
doaj +1 more source
Conservation Biology, EarlyView.Abstract Ecological niche models (ENMs) are used to assess the abiotic preferences of species by linking their occurrences to the environmental conditions in which they live. We developed a fossil‐informed ENM framework that integrates mid‐Holocene and modern occurrences to test niche stability and reconstruct abiotic niche characteristics for four ...
Claire. M. Williams +3 more
wiley +1 more source
, 2020 【目的】 设计开发模块化计量指标分析平台,满足计量分析人员多维条件定制、实时高效计算的计量分析需求。【应用背景】 面对海量科学文献数据,传统关系数据库进行大数据量计量计算时效率较低,计算时间长,分布式大数据技术为实时性科学计量分析平台提供了技术基础。【方法】 设计计量指标管理模型及基于工作流的指标构建流程,将分析任务分解为多个可独立计算单元;基于分布式大数据ES索引、Redis集合计算、预计算指标等技术,将计算统计任务转化为倒排索引查询及集合运算等操作。【结果】 ...
常志军 +5 more
core
Assessing and strengthening community‐based coastal governance
Conservation Biology, EarlyView.Abstract Community‐based coastal governance is essential for biodiversity conservation and sustainable livelihoods, yet many communities continue to face significant challenges in establishing and sustaining effective governance systems. We sought to improve understanding of the current status of community‐based coastal governance across five countries
Mark Andrachuk +21 more
wiley +1 more source
Conservation Biology, EarlyView.Abstract Reversing ongoing biodiversity loss requires effectively managing anthropogenic threats. Although conservation actions can mitigate these threats, prioritizing and targeting such actions remain challenging because species respond differently depending on the nature of the threats and their biological traits.
Camila Guerrero‐Pineda +3 more
wiley +1 more source
Pairs trading strategy of ETF based on mixture Copula(基于混合Copula的ETF配对交易策略)
Zhejiang Daxue xuebao. Lixue ban, 2016 配对交易是一种非常普遍的投资策略，被广泛应用于金融市场.距离法和协整法在配对交易策略中使用最普遍，然而，这2种方法只能描述股票之间的线性相关结构.本文基于3类基本的阿基米德Copula函数构成的混合Copula,定量刻画了资产之间的条件相关性，给出了新的配对交易策略，并将其运用于高频ETF市场.实证分析表明，新的策略可以捕获更多相依信息，得到更多的交易机会.
SHENYinfang(沈银芳) +2 more
doaj +1 more source
[Prospects for the Application of Healthcare Big Data Combined With Large Language Models]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue Ban, 2023 Chen R.
europepmc +1 more source
, 2020 【目的】随着科学大数据技术的发展,问题导向的数据端分析成为常态。科学数据处理以云计算的形式跑在数据端,并提供安全的用户访问方式、可选的算法资源库、高效的数据存取接口、便捷的用户交互工具、有效扩展的计算和存储资源,将有力提升科学家的数据分析探索效率。【方法】本文提出一种基于容器技术的科学数据端云分析服务管理引擎设计方案:资源节点以自动注册的方式进行横向扩展,资源节点可以是物理主机或虚拟主机;当在用资源达到阈值,管理节点通过接口启动资源节点的注册,同时资源入池;可选的算法资源库 ...
谢志敏 +8 more
core
Conservation Biology, EarlyView.Abstract Site fidelity is the tendency for animals to repeatedly return to the same locations, either within or between years. Site fidelity enables animals to utilize knowledge of previously visited locations, including assessments of seasonal variations in health and mortality risks (e.g., predation), resource availability, and social benefits such ...
Tobias A. Ross +13 more
wiley +1 more source
Conservation Biology, EarlyView.Abstract Modeling species distributions in dynamic pelagic environments remains challenging, particularly for wide‐ranging and highly mobile species when there is limited guidance on model performance. This limitation constrains the effective use of species distribution models (SDMs) in marine conservation, where robust and transferable predictions are
E. Pasanisi +32 more
wiley +1 more source