材料期刊网

THE MARTENSITIC TRANSFORMATION IN(Y,Mg)-PSZ CERAMICS

DAI Zurong LI Baocheng Taiyuan Institute of Mechanical Engineering , Taiyuan , ChinaWU Houzheng CHEN Yuru LIU Wenxi Tianjin University , Tianjin , China

金属学报(英文版)

A dynamic process of the martensitic transformation in(Y,Mg)-PSZ ceramics was observed in situ using TEM.Under the effect of contact stress between tetragonal(t)-ZrO_2 precipi- tates,a group of substructural martensite variants may occur priorly and then another one was induced by the elastic strain relaxation,both form(100)_m twins further.In addition,the crystallography of the martensitic transformation was also discussed.

关键词: ceramics , null , null

Chen系统的状态变量周期性反馈控制

李开明 , 李亚洲 , 冯维贵 , 林长

量子电子学报 doi:10.3969/j.issn.1007-5461.2007.05.014

采用非线性反馈控制,用附加了带参数的正弦项对Chen系统进行了有效的控制.随着参数k的逐渐增大,系统的动力学行为呈现出一系列的变化.数值研究结果表明:随控制参数的增大,驱动信号的强度渐大,混沌系统由混沌运动到周期轨道,最终到一相点.

关键词: 混沌 , Chen系统 , 不动点 , Lyapunov指数 , 反馈控制

University of Science and Technology Beijing

JIA Shizhen University of Science and Technology Beijing , China.

材料科学技术（英）

关键词:

Geochemical Characteristics of Rare Earth Elements in Intertidal Sediments of Tianjin Coastal Zone

王立军 , 张朝生 , 李国胜 , 梁涛

稀土学报(英文版)

关键词:

Geochemical Characteristics of Rare Earth Elements in Intertidal Sediments of Tianjin Coastal Zone

王立军 , 张朝生 , 李国胜 , 梁涛

稀土学报(英文版)

关键词:

Geochemical Characteristics of Rare Earth Elements in Intertidal Sediments of Tianjin Coastal Zone

王立军 , 张朝生 , 李国胜 , 梁涛

稀土学报(英文版)

关键词:

Geochemical Characteristics of Rare Earth Elements in Intertidal Sediments of Tianjin Coastal Zone

王立军 , 张朝生 , 李国胜 , 梁涛

稀土学报(英文版)

关键词:

Geochemical Characteristics of Rare Earth Elements in Intertidal Sediments of Tianjin Coastal Zone

王立军 , 张朝生 , 李国胜 , 梁涛

稀土学报(英文版)

关键词:

Geochemical Characteristics of Rare Earth Elements in Intertidal Sediments of Tianjin Coastal Zone

王立军 , 张朝生 , 李国胜 , 梁涛

稀土学报(英文版)

关键词:

Department of Metallurgy and Materials Engineering of Chongqing University

YAN Guangting Chongqing University , Sichuan , China.

材料科学技术（英）

关键词: