Results 11 to 20 of about 745 (115)

Studies on integration of GIS-platforms in Zhejiang Provincial water conservancy management information system(集成多种GIS平台和技术的浙江省水利综合管理信息系统研究)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2001
本文介绍了浙江省水利综合信息系统的功能模块组成,对系统数据库结构及逻辑关系进行了分析,论述了系统主要开发工具和运行平台的特点,通过在浙江省政府等部门的应用表明,系统设计先进,功能强大,运行稳定,具有很强的实用性.
LIURen-yi(刘仁义)
doaj   +1 more source

Theory and algorithm of automated synthesis of ternary T-Gate combinational logic networks(三值T门组合网络自动综合的理论和算法)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2018
利用具有补运算三值格代数系统和三值T代数系统的基本运算和主要性质,提出了基于三值逻辑函数简化不相交积之和形式的三值T门组合网络自动综合的一些理论问题和算法,并给出了应用实例.利用CMOS管电路实现了三值T门模块和应用实例中的三值T门组合网络.HSPICE仿真实验验证了所设计的三值T门组合网络逻辑功能正确,表明该算法是有效的.该方法易实现三值T门组合网络的自动综合.
JIANGEnhua(姜恩华)   +1 more
doaj   +1 more source

Synthesis of symmetric functions based on RM type universal logic module ULM3(基于RM型通用门ULM3的对称函数综合)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2008
阐述了基本RM型对称函数的定义和性质,给出了任意n变量对称函数在n — 1变量基本RM型对称函数完备集中展开系数的计算公式,在此基础上,提出了基于RM型三变量通用逻辑门ULM3的变量数为奇数或偶数的对称函数综合方法,实例验证了上述方法的有效性.
QIUXiao-hua(邱晓华)   +1 more
doaj   +1 more source

Design of universal threshold logic gate based on complementary SET(基于互补型SET的通用阈值逻辑门设计)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2017
与MOS管相比,单电子晶体管(SET)具有超低功耗、超高集成度等优点,被认为是可能取代MOS管的新一代量子器件的主要竞争者.在简要介绍SET特性及通用阈值逻辑门(UTLG)的基础上,沿用CMOS逻辑电路的设计思想,提出了功能强大的基于互补型SET的三变量UTLG实现方案.利用一个UTLG辅之少量门电路就可实现全部256个三变量逻辑函数.通过实例说明了利用查表设计进行UTLG综合的过程.对所设计的SET电路进行了Pspice仿真,结果表明 ...
YINGShiyan(应时彦)   +3 more
doaj   +1 more source

Adverse perinatal outcomes are strongly associated with degree of abnormality in uterine artery Doppler pulsatility index

open access: yesUltrasound 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

Diagnostic accuracy of prenatal ultrasound in coarctation of aorta: systematic review and individual participant data meta‐analysis

open access: yesUltrasound 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

Maintaining the area consistency of land parcel based on change types(基于变化类型的地类图斑面积一致性维护)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2012
维护数据更新前后的空间拓扑一致性与属性逻辑一致性是数据更新过程中必须考虑的问题.由于地类图斑的属性面积与图形面积在数据库存储的精度不同,四舍五入后造成数据更新前后属性面积统计值存在差异.本文在分析地理实体变化类型后提出了数据更新过程中地类图斑的6种变化类型,针对分割与综合变化2种具有代表性的变化类型,设计与实现了不同的维护面积一致性的方法,并在实际应用系统中得到有效验证.
TANGYuan-bin(唐远彬)   +3 more
doaj   +1 more source

Tabular synthesis of three-variable functions using one-bit full adders(基于一位全加器三变量逻辑函数的查表综合)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2003
通过对1个一位全加器3个输入端不同的组合,可以实现与门、或门、非门、同或门及异或门,因此全加器在数字逻辑电路中有着重要的作用.本文在介绍全加器的基础上提出了用查表法设计基于一位全加器实现任意三变量函数的组合电路和时序电路.在与传统的与非门/或非门的比较中,它显示了优势.
ZHOUChang(周畅)   +2 more
doaj   +1 more source

CRM expansion's tabular design based on three-variable universal-threshold-logic gates with complementary outputs(基于互补输出的三变量通用阈值逻辑门CRM展开函数查表设计)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2010
介绍了在或-同或系统中逻辑函数的CRM展开与分类,给出了基于逻辑函数CRM展开的三变量函数P分类表、接线顺序表.讨论了互补输出通用阈值逻辑门及其设计方法.提出了CRM展开的P分类代表函数的接线方案表.在此基础上,提出了基于互补输出的三变量通用阈值逻辑门的任意三变量CRM展开函数的查表设计方法.通过若干设计实例,证明了此方法的有效性.
XIAOLin-rong(肖林荣)
doaj   +1 more source

可控掺杂双极性半导体聚合物应用于简化构筑综合 性能优异的有机逻辑电路 [PDF]

open access: bronze, 2023
Jiaxin Yang   +11 more
openalex   +1 more source

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