YAO Xuexing KANG Feiyu CHEN Nanping Tsinghua University
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Beijing 100084
,
China
金属学报(英文版)
The creep fracture behavior of intermetallic compound(Fe_(60)Ni_(40))_3(V_(98)Ti_2)has been studied. The variation of dislocation substructure was observed with TEM in the process of steady-state creep.It is found that there exists a large amount of stacking faults,dislocation pairs and also high density dislocation networks.SEM analysis of section near fracture sur- face points out that the intergranular crack due to coalescence of small cavities is the main creep fracture mechanism of(Fe_(60)Ni_(40))_3(V_(98)Ti_2).
关键词:
intermetallic compound
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null
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null
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null
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
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Chen系统
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不动点
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Lyapunov指数
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反馈控制