Results 31 to 40 of about 374,705 (148)
The Political Empowerment of Women and Industrialization in Africa
Politics &Policy, Volume 53, Issue 6, December 2025.ABSTRACT This study examines the effect of political empowerment of women on industrialization in Africa. The results, after controlling for cross‐sectional dependence, show that women's political implication causes industrialization. The fixed effects Driscoll/Kraay standard error and the GMM estimators reveal that women's political empowerment ...
Tii N. Nchofoung +2 more
wiley +1 more source
, 1986 本文描述了用小功率连续CO2激光器,定标短脉冲,大口径,大能量的激光能量计的方法,并且详细地讨论了误差的修正。一、引言阳极化的铝板作探测元件,能吸收96％以上的被测光,使转变为热,再通过热电堆变为电信号进行测量。我们用它制作了口径φ100mm的能量计,用以测量每个脉冲100～500J能量的自制电子束脉冲CO2激光器的能量。激光器的脉冲宽度是μs级的。但是,目前μs级的脉冲能量计定标,还是用连续光源。这使热电型能量计定标 ...
傅裕寿 +3 more
core +2 more sources
Ultrasound in Obstetrics &Gynecology, Volume 65, Issue 5, Page 624-632, May 2025.ABSTRACT Objectives Placental insufficiency contributes to many obstetric pathologies, but there is no bedside clinical tool to evaluate placental perfusion. We have developed a method to acquire multiple three‐dimensional (3D) power Doppler (PD) ultrasound (US) volumes of placental vasculature, with infrared camera tracking of the precise spatial ...
A. Xue +5 more
wiley +1 more source
Landscape‐scale predictions of future grassland conversion to cropland or development
Conservation Biology, Volume 39, Issue 1, February 2025.Abstract Grassland conservation planning often focuses on high‐risk landscapes, but many grassland conversion models are not designed to optimize conservation planning because they lack multidimensional risk assessments and are misaligned with ecological and conservation delivery scales.
Kevin W. Barnes +2 more
wiley +1 more source
World Medical &Health Policy, Volume 16, Issue 4, Page 547-557, December 2024.Abstract We evaluate the effect of the recent spate of tax reform laws on cigarette and fermented liquor consumption in the Philippines using an error correction model that utilizes regularly available national data. Since 2012, the Philippine government passed three reform measures that substantially increases cigarette and alcohol excise taxes to ...
Rutcher M. Lacaza +1 more
wiley +1 more source
A standard approach for including climate change responses in IUCN Red List assessments
Conservation Biology, Volume 38, Issue 3, June 2024.Abstract The International Union for Conservation of Nature (IUCN) Red List is a central tool for extinction risk monitoring and influences global biodiversity policy and action. But, to be effective, it is crucial that it consistently accounts for each driver of extinction.
Giordano Mancini +7 more
wiley +1 more source
Jixie chuandong, 1998 摆线针轮行星减速机的传动误差是其内部各零部件的制造误差、装配误差和修形原理误差的函数。运用齿轮啮合原理 ,从减速机的制造过程和装配过程出发 ,可以建立较符合工程实际的数学模型并进而推导出减速机传动误差的解析计算方法。通过单因素分析 ,可以了解各种单项制造误差因素对减速机传动误差的影响程度。通过对传动误差进行统计计算 ,可以对减速机的优化设计 ...
姚文席
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四川大学学报. 自然科学版, 2012 作者研究了异方差回归模型的估计与变量选择问题.在误差分布未知的情况下,作者分别给出了联系函数已知及未知时均值与方差的估计.另外,作者在给出估计的同时,分别选出了对均值与方差影响显著的变量.
樊仕利, 赵永红, 罗杨飞
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Convergence of a deformed Newton's method(一类变形Newton法的收敛性)
Zhejiang Daxue xuebao. Lixue ban, 2006 提出了一类变形Newton迭代，并给出了它的收敛性和误差估计，比较了它与传统Newton法之间的差异，最后还讨论了本迭代法及其收敛条件的推广.
GUOXue-ping(郭学萍), FENGJing(丰静)
doaj +1 more source
Gaoya dianqi, 2019 基于特高频（UHF）信号的局部放电（PD）定位方法由于其对信号时差的计算误差较大,因此还未能在变电站中进行广泛的应用。文中提出了一种基于线性预测分析的时差估计方法,该算法首先对实际采集的特高频信号做预测分析,然后对预测误差应用幂定律以突显局放发生时刻,最后利用广义相关法进行时差估计。该方法能够以较高的精度计算信号时差,从而提高了局放定位的精度。实验结果表明,利用文中方法进行局放定位,定位距离误差可控制在1 m以下,方向角定位误差可控制在8°以下,证明了该方法的可行性。
田妍, 王勇, 杨森, 周南, 李臻
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