Results 41 to 50 of about 256,015 (173)
Two Dimensional Flow around an Air-Intake [PDF]
, 1961 By the method of conformal transformation, the flow around an air intake has been studied. And the stream lines, free stream lines, and the pressure distributions have been obtained for several cases of varying rate of discharge.1.写像 2.複素ポテンシャル 3 ...
三上 房男
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Geographic risks to functional groups of mammals and birds from habitat loss in Mexico
Conservation Biology, EarlyView.Abstract There is a need to quantify the impact of habitat loss due to anthropogenic factors on different aspects of biodiversity, such as functional trait diversity represented by functional groups (FGs). We developed a metric to assess the weighted risk of loss of habitat for 33 FGs of mammals and 36 FGs of birds in Mexico based on potential ...
Fernando Mayani‐Parás +4 more
wiley +1 more source
Dianci bileiqi, 2018 电位分布及温度分布情况是对避雷器健康运行进行评价的重要指标,直接关系到整支避雷器的运行寿命,在无均压措施的情况下,将导致老化速度加快,甚至发生热崩溃。对避雷器的电位分布情况进行测试是对避雷器进行均压的首要条件,但传统检测手段均为基于有线光纤方式进行电位分布采集。本项目基于高性能AVR微处理器,便携式单片微型计算机采样,无线通信,同步采样分析等手段,成功研制了避雷器电位分布及温度分布无线检测系统。对避雷器电位分布及温度分布情况以无线同步方式进行测试,避免了测试现场繁琐的光纤布线 ...
李佳奇 +5 more
doaj
The distribution of examples of the Japanese words that express the feelings about "regret" and "envy" [PDF]
, 2009 日本語心情語彙の通時的研究の一環として,日本文学史上の代表的な作品とみられるものを対象に,｢残念｣と｢嫉妬｣の心情を表す和語の用例分布を調査した｡本稿では,その用例分布表を掲示し分布の特徴を指摘した｡この分野の語の出現頻度は,源氏物語を始めとする平安女流文学作品においてとりわけ際だつ｡現代語につながる｢くやむ｣｢妬まし｣は,中世に派生形として出現した語である｡形容詞からの動詞派生語｢～がる｣の用例は,ほとんど｢くち惜し｣と｢妬し ...
Chen, Gang, Yoshida, Norio
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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
Asymptotic distribution of the product of trimmed sums(一类截断部分和乘积的渐近正态性)
Zhejiang Daxue xuebao. Lixue ban, 2007 对于取值为正的独立同分布且平方可积的随机变量X1，X2，…且有连续的分布函数，令Mn = max{X1，X2, …，Xn}，对某固定常数a>0，令，截断和Tn（a）= Sn — Sn(a），在X的分布满足中尾分布的条件时，截断和Tn(a)的乘积为渐近对数正态.
ZOUHai-lian(邹海连) +1 more
doaj +1 more source
Conservation Biology, EarlyView.Abstract Achieving global conservation policy goals requires the ability to set and measure progress toward science‐based targets for biodiversity. The species threat abatement and restoration (STAR) metric was developed to enable actors to set science‐based targets for species.
Louise Mair +17 more
wiley +1 more source
野生动物学报, 2010 根据2008～2009年实地考察研究结果,着重就该区2种有蹄类动物的分布、种群数量以及有关问题作概要性探讨。调查研究结果表明:（1）老虎台盘羊分布区盘羊平均密度=8.49/8=1.06只/km2,黑英山盘羊分布区盘羊平均密度=5.34/3=1.78只/km2。整个分布区盘羊种群数量1 488只,其中,老虎台分布区种群数量=480×1.06=509只,黑英山分布区种群数量=550×1.78=979只。（2）老虎台北山羊分布区北山羊平均密度=14.59/5=2.92只/km2 ...
阿布力米提·阿布都卡迪尔 +5 more
doaj
Dianci bileiqi, 2023 大量分布式新能源并网所带来的高随机性和强波动性将引发配电网的暂态过电压行为，是分布式能源发展的痼疾之一。本研究总结了分布式新能源并网接入系统产生的暂态过电压问题，并总结了过电压抑制方法，分析了分布式新能源接入系统中暂态过电压机理，包括功率变化、不对称故障、工作频率和谐振等因素。在此基础上，总结了分布式抑制暂态过电压的方法，包括母线调节和逆变器控制等手段，并指出了抑制方法的优缺点，最后针对分布式新能源高渗透率化和大量负荷随机性接入角度进行了展望。本研究有助于更好地理解分布式新能源接入暂态过电压问题 ...
牛嘉琪
doaj
Inter-Regional Wage Differentials in Portugal: An Analysis Across the Wage Distribution [PDF]
, 2012 Typically, studies on regional wage differentials are based on ordinary least squares (OLS) estimates. Quantile regression is an alternative approach which allows these differences to be studied across the whole wage distribution.
Galego, Aurora, Pereira, João
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