Results 11 to 20 of about 428,142 (147)
, 2008 建立了变频空调系统的动态仿真模型。采用集总参数方法和移动边界模型分别建立蒸发器5阶和冷凝器7阶动态模型；压缩机和膨胀阀由于热惯性小，采用稳态模型求解。系统动态模型以压缩机和膨胀阀模型作为边界条件，通过联立两换热器动态模型，组合成12阶矩阵模型。仿真结果表明，此模型可对压缩机转速、膨胀阀开度、风量等阶跃变化时 ...
肖洪海 +7 more
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, 2017 编者按：近期，中国科学院力学研究所非线性力学国家重点实验室何国威课题组在《流体力学年鉴》（ANNUAL REVIEW OFFLUID MECHANICS）发表了题为“湍流的时空关联和动态耦合”的综述性论文。《流体力学年鉴》是国际流体力学界的顶级刊物（影响因子为12），每年大约发表二十篇左右的论文，对当今流体力学领域的重要问题和成果做出总结，分析和发展预测。该论文是继周培源先生在一九九五年的《中国湍流研究五十年》论文之后，第二篇以中国大陆科研机构和大学为第一作者单位发表在 ...
王柏懿编撰, 何国威
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A systematic review of avian influenza virus transmission models: Gaps and opportunities
Methods in Ecology and Evolution, EarlyView.Abstract Highly pathogenic avian influenza virus (HPAIV) increasingly threatens wild birds, poultry, non‐human mammals and humans, yet gaps and opportunities in avian influenza virus (AIV) transmission modelling have not been comprehensively synthesized.
Shenglai Yin +7 more
wiley +1 more source
土壤呼吸作用时空动态变化及其影响机制研究与展望. [PDF]
, 2009 测定不同陆地生态系统土壤呼吸速率及其时空波动,阐明其影响因子,对于全球碳素平衡预算和全球变化潜在效应估计是最为基本的数据。然而,有关土壤呼吸作用变异性及其影响因素的知识仍存在局限性,一些关键的过程和机制还有待阐明。该文综述了近年来土壤呼吸作用时空动态规律、影响机制和模拟方面的研究进展,指出环境因子和生物因子共同驱动着土壤呼吸作用的时间动态变化;土壤呼吸作用在不同时间尺度上还具有明显的空间异质性,这主要是植被覆盖、根系分布、主要的环境因素和土壤特性空间分布的异质性造成的 ...
韩广轩, 周广胜., 周广胜
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Twelve principles for successful governance of community‐based coastal marine restoration
Conservation Biology, EarlyView.Abstract Global agreements, such as the Global Biodiversity Framework, call for urgent, large‐scale action to halt biodiversity loss through a whole‐of‐society approach. Community‐based restoration can play a crucial role in achieving this goal, yet there remains limited understanding of what makes these projects effective and sustainable.
Michelle M. Holian +2 more
wiley +1 more source
可量化的移动Ad Hoc网络时空动态特性评估方法 [PDF]
, 2011 移动模型是Ad Hoc网络区别于其他形式网络的重要标志,对其产生的动态网络特性(简称动态特性)进行评估,是研究Ad Hoc网络的协议仿真和网络相关技术(如拓扑控制和网络性能测量等)的基础性问题.在已有研究的基础上,改进了网络的模型化描述,克服了以往模型无法很好地描述相关联的时空动态特性的缺陷,并在此基础上,提出了移动模型通用的可量化时空动态特性评估方法.通过构建节点空间位置分布,建立网络拓扑时空动态特性的分析模型,深入研究了几种移动模型的动态性.提出一种圆周曲线移动模型 ...
王备战, 管晓宏, 王伟, 王亚平
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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
Optimizing biodiversity offsetting for habitat succession and colonization dynamics
Conservation Biology, EarlyView.Abstract Biodiversity offsetting aims to compensate for ecological losses from development through conservation and restoration. However, its long‐term outcomes under repeated impact–offset cycles remain uncertain. Using a conceptual forest succession model, we evaluated how offset outcomes are affected by interactions among compensation scale ...
Konstans Wells +4 more
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Pest‐preservation paradox among insects
Conservation Biology, EarlyView.The pest‐preservation paradox is a non‐binary perspective that insects range from those that are harmful and requiring management on the one side, to those requiring conservation intervention on the opposite end of the spectrum. Importantly, the vast majority of insects occur somewhere in the center of the two extremes, and their position along the ...
Michael J. Samways +3 more
wiley +1 more source
, 1988 本文研究爆炸处理时裂纹在应力波作用下的动态扩展行为,分别讨论了入射波、反射波和应力波持续时间的作用,并根据线弹性断裂力学复合型准则和动态断裂准则对裂纹的扩展进行了分析,作者建议用吸能块的办法控制爆炸处理时裂纹的扩展 ...
郑哲敏, 高桦, 孙琦清
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