材料期刊网

TEM OBSERVATION OF LOCAL DEFORMATION BAND AT CRACK TIP

YAO Kefu University of Science and Technology Beijing , Beijing , ChinaTANG Naivong CHEN Nanping Tsinghua University , Beijing , China

金属学报(英文版)

The thin foil specimen of a ferrite-austenite duplex stainless steel was tensiled under transmis- sion electron microscope(TEM).It was found that both in ferrite and austenite the local deformation band at crack tip was formed near to the crack propagating direction.Its forma- tion was related with the crack tip Schmid factor,dislocation shielding,latent hardening and hardening coefficient.When the crack tip emitted dislocations to a slip system by the action of pure mode Ⅱ stress resolute,and the decreasing rate of hardening coefficient was suitable,lo- cal deformation band was easy to form.

关键词: crack tip , null , null

RF deflecting cavity design for bunch length measurement of photoinjector at Tsinghua University

中国物理C

关键词:

Design of an MeV ultra-fast electron diffraction experiment at Tsinghua university

中国物理C

关键词:

TW Laser system for Thomson scattering X-ray light source at Tsinghua University

中国物理C

关键词:

Generating 10-40 MeV high quality monoenergetic electron beams using a 5 TW 60 fs laser at Tsinghua University

HUA Jian-Fei , YAN Li-Xin , PAI Chih-Hao , ZHANG Chao-Jie , LI Fei , WAN Yang , WU Yi-Peng

中国物理C doi:10.1088/1674-1137/39/1/017001

关键词:

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（英文）

关键词:

A simulation study of Tsinghua Thomson scattering X-ray source

中国物理C

关键词:

Department of Metallurgy and Materials Engineering of Chongqing University

YAN Guangting Chongqing University , Sichuan , China.

材料科学技术（英文）

关键词:

Institute of Materials Science at Jilin University——A Brief Overview

WANG Yuming Institute of Materials Science , Jilin University , Changchun , 130023 , China

材料科学技术（英文）

关键词: