Results 51 to 60 of about 713 (143)
Ultrasound in Obstetrics &Gynecology, Volume 64, Issue 4, Page 504-512, October 2024.ABSTRACT Objective To investigate the association between varying degrees of abnormality in the Doppler uterine artery pulsatility index (UtA‐PI) and adverse perinatal outcome. Methods This was a prospective study of women with a singleton, non‐anomalous pregnancy in whom UtA‐PI was measured universally in midpregnancy and who gave birth in Oxford ...
S. Dockree +6 more
wiley +1 more source
Design of binary dynamic BiCMOS circuits(二值动态BiCMOS电路设计)
Zhejiang Daxue xuebao. Lixue ban, 2008 动态电路在当前低功耗设计中受到越来越多的关注，而兼具CMOS电路及TTL电路优点的BiCMOS电路的应用日益广泛.本文以一种n型BiCMOS动态电路为基础，提出了一种新的二值动态BiCMOS电路的通用结构及设计方法，根据该结构及方法设计的动态电路不仅集成度高、功耗低、速度快、电流驱动能力强，而且结构简单，设计方便，计算机模拟结果证明，设计的电路具有正确的逻辑功能，且速度快，功耗低.
HUXiao-hui(胡晓慧) +1 more
doaj +1 more source
Rare Metals, Volume 43, Issue 7, Page 3242-3249, July 2024.Graphical abstract AbstractIn this work, a conventional HfO2 gate dielectric layer is replaced with a 3‐nm ferroelectric (Fe) HZO layer in the gate stacks of advanced fin field‐effect transistors (FinFETs). Fe‐induced characteristics, e.g., negative drain induced barrier lowering (N‐DIBL) and negative differential resistance (NDR), are clearly observed
Zhao‐Hao Zhang +10 more
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 63, Issue 5, Page 605-612, May 2024.ABSTRACT Objective Antenatal growth assessment using ultrasound aims to identify small fetuses that are at higher risk of perinatal morbidity and mortality. This study explored whether the association between suboptimal fetal growth and adverse perinatal outcome varies with different definitions of fetal growth restriction (FGR) and different weight ...
M. Mascherpa +6 more
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 63, Issue 4, Page 446-456, April 2024.ABSTRACT Objective To determine the diagnostic accuracy of prenatal ultrasound in detecting coarctation of the aorta (CoA). Methods An individual participant data meta‐analysis was performed to report on the strength of association and diagnostic accuracy of different ultrasound signs in detecting CoA prenatally.
C. Villalaín +20 more
wiley +1 more source
I2L circuits design of multiple-valued modulo-operations(多值模运算的I2L电路实现)
Zhejiang Daxue xuebao. Lixue ban, 2002 根据多值模代数运算理论及开关信号理论,建立了适用于I2L电路设计的三值模运算的接地开关运算表示式.在此基础上,成功指导了对模3加、减、乘和除等运算电路的开关级设计,从而进一步完善了对多值模代数系统电路设计的研究.
SHENGFa-sheng(盛法生) +2 more
doaj +1 more source
Research & Application of Fuzzy Generalized Predictive Control Based on T-S Model [PDF]
, 2006 随着科学技术和生产力的不断发展，在实际工业过程中受控对象越来越复杂，表现为如下一些特征：多输入多输出、时变性、藕合、时滞、非线性、不确定性、信息量少、高性能指标等。诸如此类的复杂系统，由于无法建立系统的精确数学模型，从而使得传统控制理论很难给出一个较好的控制效果，甚至不能控制。本文针对热工过程中的非线性、多变量、大时滞等特点，致力于从非线性角度研究预测控制算法在热工过程中的应用。本文的主要内容是研究基于T-S模糊模型的非线性系统辨识算法，并在此基础上研究非线性系统的模糊预测控制问题，并且把基于T ...
曾海莹
core
THE BRIEF RESEARCH REPORT ON THE COGNITIONOF COM PUTER SCIENCE AND TECHNOLOGY [PDF]
, 2001 中文摘要：计算机科学与技术的认知对学科的科学研究与人才培养具有重要的意义. 对计算机科学与技术学科发展 的主线、特点和内在规律进行了回顾与总结, 从科学哲学的角度阐述了学科的一系列认知问题, 并概要介绍了学科 方法论研究的主要进展, 讨论了学科方法论研究进展对学科未来发展和人才培养可能产生的影响. 英文摘要：The cogn it ion of compu ter science and techno logy is very inpo rtan t fo r studying com2 pu ter ...
赵致琢
core +1 more source
智能科学与技术学报帕金森病（Parkinson’s disease，PD）患者常伴随认知障碍，严重影响生活质量，因此对帕金森病认知障碍进行超前预测对于临床诊断和干预至关重要。然而，帕金森病受多变量因素（如年龄、性别、病程时间等）的耦合影响，使得认知障碍的超前预测面临严峻挑战。针对帕金森病认知障碍的多变量耦合特性，采用多变量逻辑回归方法，构建了一种新型列线图模型，旨在超前预测帕金森病患者发生认知障碍（cognitive impairment，CI）的风险。首先，应用最小绝对收缩选择算子（least absolute ...
巴梦茹, 尹晓红, 李少远
doaj +1 more source
Design of multiple-valued RTD inverters based on switching sequence(基于开关序列的RTD多值反相器设计)
Zhejiang Daxue xuebao. Lixue ban, 2004 共振隧穿二极管(Resonant Tunneling Diode-RTD)本身所具有的负阻抗(Negative Differential Resistance-NDR)特性使其成为天然的多值器件.本文描述了RTD以及三端共振隧穿(Resonant Tunneling-RT)器件的伏安特性,介绍了元件用PSPICE软件的模拟方法,并以开关序列原理为指导思想设计出更为简洁的三值、四值反相器电路.设计出的电路具有低功耗和高速的特点,适合作为超高速大规模数字集成电路中的单元电路.
LINMi(林弥) +2 more
doaj +1 more source