Results 61 to 70 of about 30,525 (149)
Ultrasound in Obstetrics &Gynecology, Volume 68, Issue 2, Page 211-219, August 2026.ABSTRACT Objectives First, to evaluate whether the ratio of soluble fms‐like tyrosine kinase‐1 to placental growth factor (sFlt‐1/PlGF) is associated with hemodynamic changes in ophthalmic artery (OA) Doppler in near‐term pregnancy. Second, to assess the performance of OA Doppler to rule in and rule out angiogenic factor imbalance.
M. F. Tinajero +7 more
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 68, Issue 2, Page 256-269, August 2026.ABSTRACT Objectives The primary aims of this study were to validate externally the diagnostic performance of the Assessment of Different NEoplasias in the adneXa (ADNEX) model for distinguishing between malignant and benign adnexal masses, when used by non‐expert ultrasound examiners in general gynecological settings with a low prevalence of ovarian ...
I. M. Dueholm Hjorth +11 more
wiley +1 more source
开放式伞形结构的形状和尺寸对爬电距离、形状因数和等效直径的影响
Dianci bileiqi, 2018 将开放式伞形结构细化为8项径向和3项轴向基本参数,给出了爬电距离、形状因数和等效直径的参数化表达式,并讨论了每一项参数对后三者的影响。采用数学建模的方法,将伞形优化设计问题转化为多元函数求最值的问题进行了讨论。本文的研究内容可为伞形优化设计提供参考。
李启源
doaj
Hypertension at 5 months postpartum in women with gestational diabetes
Ultrasound in Obstetrics &Gynecology, Volume 68, Issue 2, Page 202-210, August 2026.ABSTRACT Objective Gestational diabetes mellitus (GDM) is associated with future maternal cardiovascular disease, independent of the development of Type‐2 diabetes mellitus. As a major cardiovascular risk factor, we examined the incidence and predictors of hypertension at 5 months postpartum in women with previous GDM.
C. Gómez Fernández +7 more
wiley +1 more source
Dianci bileiqi, 2020 提出一种基于三参数Burr分布的估计方法来描述零值悬瓷绝缘子的温度分布特性。为验证这一方法,以某省电网运行10年及以上变电站悬式绝缘子红外测零项目的红外测温数据为研究对象,通过统计分析建立了三参数Burr分布数学模型。由于该分布函数的参数在极大似然估计法下没有显式解,故采用牛顿法对其求解,可得到三参数Burr分布对绝缘子零值温差分布的拟合曲线;然后,在MATLAB中利用Kolmogorov-Smirnov方法对于该分布模型进行了参数检验。检验结果表明 ...
徐华 +8 more
doaj
World Water Policy, Volume 12, Issue 3, August 2026.ABSTRACT Village tank cascade systems (VTCS) are a long‐established form of water management in Sri Lanka's dry zone. However, their role in groundwater recharge, climate adaptation, and water governance remains insufficiently recognized in policy and planning.
Ananthini Nanthakumaran +1 more
wiley +1 more source
World Water Policy, Volume 12, Issue 3, August 2026.ABSTRACT In Ghana, the government has initiated a reform in rural water management to shift away from community‐based management (CBM) to state management, but research assessing the reform is still insufficient. This study aims to critically evaluate the impact of the reform in addressing rural water challenges.
Ernestina Ohenewaah Denchie, Kevin Lo
wiley +1 more source
Jixie chuandong, 2015 由于自动装盒机装盒尺寸不同,送盒凸轮大小和行程等参数都会改变,需经常更换送盒凸轮。传统的CAD/CAM软件凸轮设计既费时又困难,据此基于UG二次开发工具,结合VC++6.0开发了凸轮参数化系统软件。经运行表明,系统具有良好的人机交互性,用户只需要输入需要修改的关键参数就可以得到新的凸轮三维模型,缩短了设计时间,实现了凸轮参数化设计。为凸轮的数控加工、仿真设计与制造、参数化设计提供了参考依据。
张宪信, 郭烈恩, 王官明
doaj +1 more source
四川大学学报. 自然科学版, 2006 研究了半参数多元回归模型E(Y|X)=μ(XTβ),其中X是维数为p的列向量,μ,β是未知参数.由于此模型不容易满足误差方差齐性和误差分布正态性,作者对该半参数回归模型两边同时应用含参数λ的Cox-Cox变换,使得变换后的回归模型满足误差方差齐性和误差分布正态性条件,然后应用局部线性技术及极大似然方法,通过两步迭代,对未知参数β,λ及未知函数μ(.)进行了估计.
赵永红, 柳洪刚, 周永道
doaj
Inferring alternative ecosystem states with field survey data
Methods in Ecology and Evolution, Volume 17, Issue 8, Page 2256-2276, August 2026.Abstract Many ecosystems potentially exhibit alternative stable states, where distinct states can coexist under identical environmental conditions. While simulation models have generated key hypotheses in alternative stable states theory, they often rely on scale‐free parameters disconnected from real ecosystems.
Ning Chen +10 more
wiley +1 more source