Results 21 to 30 of about 2,331,158 (156)
Role of funders in embedding tests in conservation practice
Conservation Biology, EarlyView.Abstract Effective conservation practice requires decisions based on reliable and relevant evidence, but significant gaps in the evidence base exist. Incorporating well‐designed tests of the effectiveness of interventions for biodiversity in conservation projects is one of the best ways to scale up the rate of evidence generation.
Rebecca K. Smith +28 more
wiley +1 more source
, 2004 对含参数跳变的一类具有有界干扰的多输入多输出系统,为改善系统的瞬态响应性能,采用由多个固定模型和两个自适应模型组成的多模型,并引入切换指标函数构成多模型切换控制器.为克服多模型方法计算量大的缺点,采用可行模型集合方法,给出了可行模型应满足的必要条件.应用这一必要条件,对系统的多个模型进行检验,可快速缩小模型可行集合的范围,再通过切换指标函数,在可行模型集合中选择正确的控制器,从而在不降低系统响应性能的前提下 ...
王建, 张珩
core
油田污水MED-TVC联合处理系统的Aspen Plus模拟与分析
Gongye shui chuli, 2015 为实现油田污水的高效洁净处理, 提出了多效蒸发(multiple effect desalination, MED) 和蒸汽热力喷射器(thermal vapor compressor, TVC)联合处理系统。应用Aspen Plus工具建立了MED-TVC系统的工艺流程模型, 并进行了模型验证。在此基础上, 分析了TVC对MED工艺的优化效果, 研究了工作蒸汽压力和TVC引射位置对系统热力性能的影响。研究结果表明:增加TVC装置及提高其工作蒸汽压力均能有效改善MED系统性能 ...
周一卉 +3 more
doaj +2 more sources
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
Subspecies taxonomy reflects social and geographic patterns of taxonomic effort in tetrapods
Conservation Biology, EarlyView.Abstract Subspecies have been used in conservation biology to account for intraspecific patterns in genetic diversity, which is crucial to long‐term population viability. Although over 3200 subspecies are currently assessed by the International Union for Conservation of Nature Red List, their biological relevance remains controversial.
Jhonny J. M. Guedes +3 more
wiley +1 more source
, 2003 一种微流控塑料芯片注射成型模具，其特征在于：模具主要由底板、模板、定型板、封闭板、立柱、螺母A组合而成；模板上表面具有芯片通道形状的凸起；定型板中部具有芯片形状的通孔A；封闭板中部具有开口M4～M12的螺孔，芯片进出口位置具有芯片进出口形状的通孔B；底板、模板、定型板、封闭板由下至上依次叠合并夹紧，立柱插入封闭板上的通孔B中，螺母A螺合于封闭板的螺孔中。用本实用新型模具成型的芯片形状尺寸均一，不需要后续的处理 ...
林炳承, 戴忠鹏, 罗勇
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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
wiley +1 more source
, 1994 现场和实验室观察表明;在断裂区内的雁型裂纹具有一个Ｒｉｅｄｅｌ几何结构。本文应用剪切裂纹位错堆积（Ｐｉｌｅ－ｕｐ）模型;描述了雁型裂纹形成的拉破坏机理;建立了雁型裂纹的分形模型来模拟Ｒｉｅｄｅｌ几何结构。根据这个模型;可以直接量测出现场和实验中出现的雁型裂纹的分形维数。在此基础上;应用分形损伤演化模型;推导出了雁型裂纹的能量耗散 ...
谢和平
core
How endorser attributes influence conservation communication
Conservation Biology, EarlyView.Abstract Conservation communication often uses the celebrity endorsement strategy. However, robust evidence regarding its effectiveness is still limited. More importantly, practitioners do not have guidelines for selecting an ideal endorser because there is no clear consensus on what endorser attributes are most critical.
Xia He, Tien Ming Lee
wiley +1 more source