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1)  Extended state
扩展态
1.
For the long-time behavior,there exist extended states and localized states coexist in every systems with various value of λ,σ(t)~t β ,0<β<1,C(t)~t -δ ,0<δ<1,and localized states at the .
发现体系中电子的本征态在λ较小时 ,存在扩展态 ;随着λ的增加 ,体系中本征态出现局域态 。
2.
In this paper we have discussed the reasons of the discrepancy of several calculational results in literature availabl about the state density of electron extended states in quantum well,and have demonstrated that our results calculated by green function method is correct.
本文分析了现有文献中关于量子阱中电子扩展态态密度计算的几种结果的差异性和原因,从而论证了我们采用的格林函数方法所得结果的正确性。
3.
When Q =2π4,we analyses theoretically the exist conditions of extended state and localiged state and find analytically the values of mobility edges.
研究了处在一维渐近周期势vn=vcos(Qn+anv)(0<λ<1)中运动的电子态的特性,从理论上分析了Q=2π/4时,扩展态和局域态存在的条件,解析地得到了迁移率边界的值。
2)  extended states
扩展态
1.
In the regime with absolute localized states,σ(t)~t O,C(t)~t O,there exists a complex phase regime in which extended states and localized states coexist.
本文研究了一类非公度系统中电子运动的能谱及其与电子动力学性质的联系 ,分析了体系的本征能量E与参数λ的关系 ,计算了自关联函数C(t)和均方位移σ(t) ,分析其长期行为 ,发现当体系各态均为扩展态时 ,σ(t)~t1,C(t)~t- 1,当体系中仅存在局域态时 ,σ(t)~t0 ,C(t)~t0 ;当体系在复杂相区时 ,体系的长期行为 ,即t→∞时 ,σ(t)~t1。
2.
Or in other words, the extended states will turn into the localized states.
Anderson在题为《某些无规点阵中不存在扩散》的论文中证明,如果势场是无规起伏的,当无序程度足够大时,就会使电子不再在整个固体中运动,而全部转变为在局域范围内运动,即由扩展态转变为定域态,这种由无序引起的定域化,称为Anderson转变。
3)  dynamic propagation
动态扩展
1.
By application of the theory of complex functions, dynamic propagation problems on mode Ⅲ asymmetrical interface crack were researched.
采用复变函数论的方法,对Ⅲ型非对称界面裂纹的动态扩展问题进行研究。
2.
By the measures of the theory of complex functions,dynamic propagation problems concerning the surfaces of asymmetrical mode Ⅲ crack subjected to moving loads were investigated.
通过复变函数论的方法,对非对称Ⅲ型裂纹表面受运动载荷的动态扩展问题进行了研究。
3.
By the theoretical method for complex functions, dynamic propagation problems concerning asymmetrical mode Ⅲ cracks were researched.
通过复变函数论的方法,对非对称Ⅲ型裂纹的动态扩展问题进行了研究。
4)  dynamic growing
动态扩展
1.
Asymptotic fields of dynamic growing crack-tip on bi-material interface;
双材料界面动态扩展裂纹尖端的渐近场
2.
Asymptotic field of mode II dynamic growing crack along a rigid/viscoelastic Bi-material interface;
刚性-黏弹性材料界面Ⅱ型动态扩展裂纹的尖端场
3.
A mechanical model of creeping materials was established,in order to investigate the viscous effect in dynamic growing crack tip field of model Ⅱ.
为了研究粘性效应作用下的动态扩展裂纹尖端渐近场,建立了蠕变材料Ⅱ型动态扩展裂纹的力学模型,在稳态蠕变阶段,弹性变形和粘性变形同时在裂纹尖端场中占主导地位,应力和应变具有相同的奇异量级,即(σ,ε)∝r-1/(n-1)。
5)  dynamic propagating
动态扩展
1.
A study on the field of dynamic propagating crack tip has vital significance to the material fracture destruction research,while the time-dependent mechanical properties of material have tremendous influence on the rigidity ,the intensity and the service life of the structure.
动态扩展裂纹尖端场对材料的断裂破坏研究有重要的意义,材料力学性质的时间相关性也对结构的刚度、强度和使用寿命产生较大的影响,同时,裂纹尖端的载荷参数,在表征裂尖场性质方面,应用十分广泛。
6)  Modal expansion
模态扩展
1.
Based on the assumption of periodic rubbing force in rotor system, the rubbing forces onto each node of rotor system are estimated by modal expansion technique and the sub-harmonic decomposition of residual matrix between faulty and faulty-free vibration signals of rotor system through FFT(fast Fourier transformation).
以某单跨双盘模型转子实验台为例,建立了该转子-轴承系统有限元模型,得到转子系统前两阶固有频率和振型向量等模态参数·基于转子系统碰摩力的周期性假设,利用模态扩展方法,对故障和健康转子系统振动信号的残差矩阵进行傅立叶级数的分频谐波近似,估算得到转子-轴承各节点的碰摩力·根据转子各结点估算碰摩力的频谱、时序以及等效碰摩力幅确定碰摩发生位置,进而对碰摩故障的程度进行定性评估·试验表明,这种方法可以对转子周期性碰摩进行较精确的诊断,并为其他转子-轴承系统故障诊断提供参考
2.
This paper gives a brief introduction of the general principle of model updating as well as the methods of model reduction and modal expansion closely related to model updating.
叙述了结构动力模型修正方法的一般原理及与其密切相关的模型缩聚和模态扩展方法,并且挑选其中具有代表性的文献,介绍和比较了3种主要的修正方法,即传统的动力模型修正方法,包括矩阵型修正方法和参数型修正方法,和最近兴起的基于神经网络的模型修正方法,重点分析了这些方法的优点和不足之处,力图能使读者对于这一研究领域的发展有一个脉络清晰的了解。
补充资料:扩展态(extendedstate)
扩展态(extendedstate)

非晶态材料中电子本征波函数不再是Bloch函数,其电子本征态分为扩展态和局域态,扩展态波函数遍及整个材料,电子占据整个材料具有有限的概率。由于晶格势能的无序涨落引起的散射,扩展态电子的迁移率远小于晶体中的共有化电子。

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