Results 11 to 20 of about 18,571 (176)
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Decomposition is the transformation of dead organic matter into its inorganic constituents. In most biomes, decomposition rates can be accurately predicted with simple mathematical models, but these models have long under‐predicted decomposition in globally extensive ...
Heather L. Throop +8 more
wiley +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Human‐driven landscape change, particularly urbanization, is reshaping pollinator communities, yet the functional traits that mediate species persistence remain poorly understood. Dietary specialization is commonly used to predict species vulnerability.
Yan Yang +5 more
wiley +1 more source
Design and Implementation of Hydrodynamic Load Control Systems [PDF]
, 2015 船舶舵装置是操控船舶航行方向的关键设备。船舶在水中航行时，是通过利用作用于舵叶上的水动力来控制航行方向。研究船舶舵装置在水中航行时的各项性能指标，最准确有效的方法是使用真实的船舶在真实的水中环境下进行，但这种方法是极不经济和现实的。如果能在室内条件下，通过一套加载控制系统，模拟水中环境，为船舶舵装置提供航行时所受的相应水动力，便能够克服环境条件，为船舶舵装置的设计和研究带来极大的便利。这便是本文的研究对象——水动力加载控制系统。本文的工作要点总结如下： 1、详细阐述水动力加载控制系统的理论基础 ...
吴立业
core
Dynamic boundary characteristics for truncated model of V-shaped orthogonally stiffened plates [PDF]
ObjectiveTo investigate the dynamic characteristics of local structures in naval architecture and ocean engineering, the dynamic boundary equivalence method between truncated model and original model is proposed.MethodThe finite element method is used to
Dong TANG +4 more
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Conservation Biology, EarlyView.Abstract Prioritization in conservation is crucial for the development of efficient and effective decision‐making policies. For many decades, the importance of some species and their habitats has been assessed and applied in conservation legislation, but bats and their diurnal roosts have ofbeen overlooked.
David López‐Bosch +6 more
wiley +1 more source
Researches of the decoupled method for reliability-based optimization [PDF]
, 2016 可靠性优化设计方法是工程结构设计中的一种非常具有优势的设计方法，其中，该方法的求解效率和求解精度是研究的重点。解耦策略是解决结构可靠性优化设计中包含复杂或隐式极限状态、多设计变量、小失效概率问题的一种高效可行的办法，它的关键在于建立失效概率的近似表达式，也就是求解失效概率函数。因此，研究高效求解失效概率函数近似的方法，以及提高优化效率和精度的解耦优化策略对于解决工程结构中的可靠性优化设计问题具有重要的作用。本文围绕上述问题展开研究工作，主要内容包括如下几个部分。 1.基于失效概率函数的概念 ...
朱海燕
core
Representation of obligate groundwater‐dwelling copepod diversity in European protected areas
Conservation Biology, EarlyView.Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli +7 more
wiley +1 more source
Conservation Biology, EarlyView.Abstract In the western United States, conservation practitioners are increasingly working with private landowners to restore habitat for North American beavers (Castor canadensis) and to use nonlethal mitigation techniques when beavers damage crops and infrastructure.
Brian D. Erickson, Megan S. Jones
wiley +1 more source
Gaoya dianqi, 2011 针对40.5kV新型磁力机构工作原理及其运动特点,进行了多场耦合的静态和动态特性仿真研究。首先,建立磁力操动机构的有限元模型,利用Maxwell软件对磁力机构的静态特性进行仿真;其次,根据电压平衡方程和达朗贝尔运动方程,在静态仿真基础上采用ADAMS和MATLAB建立40.5kV磁力机构SF6断路器运动模型,对磁力机构的动铁心、SF6断路器触头运动特性进行了仿真研究。最后,分析了磁力机构运动特性对SF6断路器性能的影响,为新型磁力机构在中压SF6断路器中应用提供了一定理论基础。
茹晶晶 +5 more
doaj
Conservation Biology, EarlyView.Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta +24 more
wiley +1 more source