查询词典 second boundary condition

Lead zirconate titanatenanopowder with a composition in the vicinty of morphotropic phase boundary (Zr/Ti=52/48) is prepared by optimizing the technology process of chemical coprecipitation method .

以四氯化钛、硝酸铅、氧氯化锆等为原料，采用化学共沉淀技术，通过优化工艺条件制备了组成在准同型相界点附近的钙钛矿相PZT纳米粉。

(1-x)BiScO3-xPbTiO3 ceramics exhibits excellent dielectric and piezoelectric properties in the vicinity of the morphotropic phase boundary (x=64.0% mol fraction PbTiO3), which separates the rhombohedral phase from tetragonal phase.

(1-x)BiScO3-xPbTiO3陶瓷在x=64.0%附近存在一个从菱方晶系过渡到四方晶系的准同型相界，在此相界附近材料能获得优良的介电和压电性能。

BiScO3-xPbTiO3 ceramics exhibits excellent dielectric and piezoelectric properties in the vicinity of the morphotropic phase boundary (x=64.0% mol fraction PbTiO3), which separates the rhombohedral phase from tetragonal phase.

(1-x)BiScO3-xPbTiO3陶瓷在x=64.0％附近存在一个从菱方晶系过渡到四方晶系的准同型相界，在此相界附近材料能获得优良的介电和压电性能。

It exhibited a well-situated property at morphotropic phase boundary when Zr content is 0.52 and PbO·WO_3 content is 0.5mol%.

研究发现：PbO·WO_3最佳掺杂量为0.5%， Zr含量为52%时材料处于准同型相界内；Pb_(1.05)Zr_(0.52Ti_(0.48)O_3- 0.5mol%(5PbO·WO_3)压电陶瓷在1100℃保温时间为2小时条件下烧结而成，在120℃硅油中，2500V/mm场强下持续极化30分钟，样品达最佳性能。

The influence of Zr/Ti on the mechanical and electrical properties ,phase composition,lattice constant of lead niobium stibium zirconate titanatePb(Nb1/2Sb1/2TiO3-PbTiO3-PbZrO3 (Nb1/2Sb1/2=0.02mol piezoelectric ceramics ,in which there are tetragonal and rhombohedral phases coexistent (morphotropic phase boundary,MPB),was studied by conventional containing lead piezoelectric ceramic processing and X-ray diffraction.

借助X-射线衍射仪，采用传统含铅压电陶瓷制备工艺研究了Zr/Ti对准同型相界附近铌锑锆钛酸铅（Pb(Nb1/2Sb1/2)TiO3-PbTiO3-PbZrO3）(Nb1/2Sb1/2=0.02mol压电陶瓷机电性能、相组成和晶格常数的影响。

Na$_{0.5}$Bi$_{0.5}$$_{1-x}$Ba$_{x}$TiO$_{3}$ ceramics with the compositions near the morphotropic phase boundary show superior piezoelectric properties due to the existence of more spontaneous polarization directions.

在准同质相界附近的组分存在较多的自发极化取向，因而表现出优良的压电性能。

The analyses of flow characteristics and the calculations of theoretical flow fields on blade-to-blade surfaces and the turbulent boundary layers in forward multiblade impellers were described in this paper.

本文分析了离心风机前向多翼叶轮内的流动特性，计算了跨叶片面内的理想流场和湍流边界层。

This method transforms the problem of time-domain response analysis from differential equations with boundary conditions to ones with initial conditions describing the ABCD matrices of multiconductor transmission lines, which are much easier to solve from the mathematics point of view.

在第四章，通过引入传输线的ABCD矩阵，提出了多导体传输线时域响应分析的一种新方法，该方法将时域响应分析从边值问题的微分方程转化为数学上更易求解的初值问题的微分方程，对传输线各个传输模式进行了综合考虑，避免了来回跟踪反射波的复杂过程。

In this thesis, the basic principles of using boundary element method to extract capacitance and the multipole accelerated algorithm are introduced. A new conductor dividing and numbering method are realized. The realizing process of multipole accelerated algorithm, especially the realizing process of unit cube's capacitance extraction, is detailedly illuminated. The realizing program chart of multiconductor capacitance extraction is given.

在本论文中，介绍了应用边界元法提取电容的基本原理和多极加速算法的基本原理；实现了一种新的导体分割编号方法；对多极加速算法的实现过程，主要是单位立方体电容提取的实现过程作了详细地说明；给出了多导体电容提取的程序实现框图。

Multiconductor interconnect ; parameter extraction ; open boundary ; finite element ; eigenfunction

多导体互连线；参数提取；开放边界；有限元；本征函数

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。