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1)  multilayed soils
层状土体
1.
In this paper, based on the method of elastical foundation reaction, the analyses of the non-lined interaction of laterally loaded piles with non-unitary stiffness and multilayed soils with reaction coefficient varying along the depth were made using step′s loading method.
文章在弹性地基反力法的基础上 ,采用逐步加载方式分析非单一刚度的横向受力桩和抗力系数等随深度任意变化的层状土体的非线性相互作用 ,并在此基础上编制了计算程
2)  layered soil
层状土层
1.
Based on modal perturbation method, a new approach is developed for solving the random seismic response of horizontal layered soil.
基于模态摄动方法,提出了层状土层随机地震反应的近似分析方法。
3)  layered soils
层状土
1.
Analytical solution of contaminant diffusion through multi-layered soils;
层状土中污染物的一维扩散解析解
2.
One dimensional consolidation analysis of layered soils with impeded boundaries;
层状土半透水边界一维固结分析
4)  layer soil
层状土壤
1.
Field experimental study of infiltration capacity of layer soil;
地表层状土壤透水性能的试验研究
5)  layered soil
层状土
1.
Calculative method of mechanical admittance curve and its preliminary application for multi-defective piles in layered soil;
层状土中多缺陷桩的导纳曲线计算及初步应用
2.
Infiltration mechanism of layered soil and its simulation model;
层状土入渗机制与数学模型
3.
A solution to the torsional response of a multi defective pile in layered soil is presented,when subjected to an impact torque at pile top.
给出层状土中多缺陷桩在桩顶冲击扭矩作用下桩顶扭转响应的解。
6)  layered soil
层状土壤
1.
Maximum height of upward capillary water movement in layered soil;
层状土壤毛管水最大上升高度分析
2.
Reviews on transport of water and salt in layered soil;
层状土壤水盐动态研究与分析
3.
To fully explore the reason of finger flow and its change law,taking three kinds of soil,which is wildly distributed in northwest of China,as experiment material,the finger flow experiment of layered soil and homogeneous soil under the condition of sufficient water supply indoor is conducted in this paper.
为了彻底认识指流的发生原因及变化规律,以我国西北地区分布较为广泛的3种土壤(西峰土、榆林土、新疆沙土)为实验对象,对均质土壤和层状土壤进行室内充分供水条件下的指流实验,发现层状土壤均有指流产生,而均质土壤则没有指流发生,并对其原因进行了简要分析。
补充资料:含铋层状氧化物铁电体
分子式:
CAS号:

性质:化学通式为:(Bi2O2)2+(Ax-1BxO3x-1)2-,式中,x为钙钛矿层厚度方向的元胞数,其值为1~5;A为较大阳离子,配位数为12;B为较小阳离子,配位数为6。A、B离子组合应满足∑XAVA+∑XBVB=6x,式中,x为相应于A、B位离子浓度,V为相应于A、B位离子的离子价态。这类层状氧化物中凡具有铁电行为的化合物就称为含铋层状结构氧化物。其结构是由二维钙钛矿层和层有规则地相互交替排列而成,沿层面具有较好的解理性。自发极化强度较高。压电性能和介电性能的各向异性大。居里温度高。自发极化强度、机械品质因素、频率的时间稳定性和温度稳定性都较高。常规陶瓷工艺很难获得致密烧结体,需用热压烧成新工艺。:PbBi2Nb2O9,BaBi2Nb2O9,SrBi2TaO9,Bi4Ti3O12,PbBi4Ti4O15,PbBi4Ti5O18等属这类铁电体。用于制作滤波器,换能器等。

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