搜索结果: 1-4 共查到“电子科学与技术 Ca”相关记录4条 . 查询时间(0.031 秒)
基于MCS-CA的考虑共因失效的复杂系统可靠性评估
部件选择性失效传播 蒙特卡罗模拟 元胞自动机
2013/5/31
共因失效普遍存在于现实的工程系统中。如果忽略共因失效对系统的影响，按照传统假设其部件独立的方法进行可靠性分析会得出过于乐观的结论，并且作出认为系统符合可靠性需求的错误判断。在考虑系统由部件选择性失效传播引起的共因失效的同时，提出了一种面向复杂系统的基于蒙特卡罗模拟（Monte Carlo simulation, MCS）与元胞自动机（cellular automata, CA）集成的可靠性评估算法...
MxZn1-xO(M=Cd,Ca)带隙调整机理研究
光电子学 晶体结构 电子结构
2009/9/17
利用第一性原理方法研究了MxZn1-xO(M=Cd, Ca)合金的电子结构，阐述了M 掺杂ZnO
的带隙调整机理.研究表明，掺杂Cd 导致ZnO 禁带宽度下降，其机理是CdxZn1-xO 价带顶始终由
O2p 占据，而导带底部则由O2p、Cd5s 与Zn4s 杂化轨道控制，随着掺杂量x 的增加，导带底逐
步下降，出现红移效应.研究还表明，掺杂Ca 导致ZnO 禁带宽度增加，其机理是CaxZn...
Relationship Among Preparation, Structure and Superconductivity in Ti-Ca-Ba-Cu-O Compounds
Ti-Ca-Ba-Cu-O Compounds Preparation Structure Superconductivity
2010/12/16
Analysis of a comprehensive set of experimental results has proven the substantial effect of the precise preparation conditions upon the structure and superconducting parameters of Ti-Ca-Ba-Cu-O sampl...
The Properties of Screen Printed (Bi,Pb)-Sr-Ca-Cu-O Thick Films Based On Decomposed Oxalate Powders
Screen Printed (Bi,Pb)-Sr-Ca-Cu-O Thick Films Decomposed Oxalate Powders
2010/12/16
The significance of powder and paste characteristics was studied in order to improve the morphology and structure of superconducting (Bi,Pb)-Sr-Ca-Cu-O screen printed thick films. Powder with nominal ...