Results 21 to 30 of about 907,556 (187)
Zhejiang Daxue xuebao. Lixue ban, 2023 在不进行量子色动力学（quantum chromodynamics，QCD）整体分析的情况下，估算新数据对部分子分布函数（parton distribution functions，PDF）的影响，以及用更新的部分子分布函数预测其他可观测量不确定度的贡献是一项非常有用的工作。首先，用更新和优化的部分子分布函数软件ePump（error PDF updating method package）研究由CMS 8 TeV顶夸克对产生的微分散射截面1/σdσ/dytt¯、1/σdσ/dmtt¯ 、1/σdσ ...
木沙江·卡得尔(MUSAJAN Kadir) +3 more
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The collective application of shorebird tracking data to conservation
Conservation Biology, EarlyView.Abstract Addressing urgent conservation issues, such as the drastic declines of North American migratory birds, requires creative, evidence‐based, efficient, and collaborative approaches. The abundance of over 50% of monitored North American shorebird populations has declined by over 50% since 1980. To address these declines, we developed a partnership
Autumn‐Lynn Harrison +71 more
wiley +1 more source
, 2009 本文在1MW切向燃烧煤粉炉试验台上进行了空气分级燃烧试验，研究了空气分级燃烧时炉膛壁面温度分布规律。试验结果表明，在空气分级燃烧时主燃区壁面温度分布相对于炉壁中心位置呈左右不对称分布，炉壁最高温度大致出现在旋转气流的上游，壁面温度分布不均匀系数为0.244；燃尽区下部壁面温度分布也呈不对称分布，最高温度出现在旋转气流的下游，壁面温度分布不均匀系数为0.106 ...
惠世恩, 李森, 徐通模
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Comprehensive framework for assessing and optimizing existing research networks
Conservation Biology, EarlyView.Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East +2 more
wiley +1 more source
Conservation Biology, EarlyView.Abstract Constructed value of information (CVoI) is an expert elicitation decision‐analytic tool used to prioritize sources of uncertainty based on their potential to improve decision outcomes if resolved. Despite increased application of CVoI, the robustness of CVoI prioritization of sources of uncertainty relative to differences in expert elicitation
Kristin P. Davis +7 more
wiley +1 more source
四川大学学报. 自然科学版, 2003 利用随机矩阵理论,在能级间距分别为等能级分布、泊松分布、正交系综分布、幺正系综分布及辛系综分布的情况下,对含电子数为奇数和偶数的金属小粒子的电子比热进行了理论计算;并对其高低温特点作了讨论.
杨晓莉, 程南璞
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Drivers of bat researchers’ intent to adopt field hygiene practices
Conservation Biology, EarlyView.Abstract Infectious disease is a growing threat to wildlife, with zoonotic transmission most likely at the human–wildlife interface. One underappreciated activity at this interface is fieldwork with wild animals, but associated risks can be mitigated through field hygiene (FH) practices, such as using personal protective equipment and other appropriate
Joanna L. Coleman +6 more
wiley +1 more source
Taxonomic and functional diversity of urban bees of the world
Conservation Biology, EarlyView.Abstract Bees play a pivotal role in terrestrial environments. Urbanization can affect these organisms and the ecosystem services they provide. However, knowledge of the global diversity of urban bees is limited. Thus, we summarized data on urban bee species identities and occurrences; compared distributions of all bees with those found in urban ...
João C. F. Cardoso +10 more
wiley +1 more source
Zhendong Ceshi yu Zhenduan为了研究大跨屋盖表面风压非高斯特性及极值风压分布，对某高铁站房屋盖进行了风洞测压试验。首先，对表面风压进行高斯分布和非高斯分布的划分；其次，对比3种不同单一概率分布（Gumbel、Lognormal和Weibull）及其对应的组合分布（双Gumbel、双Lognormal和双Weibull）对屋盖表面风压时程的拟合效果，并比较了组合概率分布获取的极值风压与修正Hermite法的估计结果；最后，给出全风向角下屋盖极值风压分布。结果表明：组合概率分布对风压时程的拟合效果优于单一分布 ...
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四川大学学报. 自然科学版, 2004 用血管铸型和组织透明方法观察研究了蓝马鸡(Crossoptilonauritum)心脏左、右冠状动脉的分支分布情况.结果表明,蓝马鸡的心脏由左右冠状动脉营养.左冠状动脉分为前室间隔支、前降支和旋支.前降支又分出动脉圆锥左支,旋支又分出左缘支.前室间隔支分布于室间隔前1/3部,前降支分支分布于左心室前壁、动脉圆锥的左侧部及右心室上部的小部等,旋支分布于左室侧壁、隔壁的部分及左心房等处.右冠状动脉沿途分出后室间隔支、动脉圆锥右支、右室前支及右缘支.后室间隔支分为三支分布于室间隔后2/3部及左右心室的隔壁等 ...
俞诗源 +4 more
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