端点效应 meaning in English
end effect
Examples
- There are two types of end effects in the empirical mode decomposition method : in the spline interpolation and in the hilbert transform
2经验模态分解方法中，有两种端点效应：在样条插值中以及在希尔伯特变换中。 - Based on the " research on the new method for rotating machine faults diagnosis based on independent component analysis " ( national nature science fund project , no : 50205025 ) and " study on the new method of corba - based distributed calculation tactics construction in remote condition monitoring and diagnosis " ( zhejiang province nature science fund project , no : 501061 ) , this paper aimed to the rotating machinery faults diagnosis oriented time - frequency analysis . the emd - based basic theories and methods were studied ; to weaken the emd method ' s end effect , some new data extention means were proposed ; to improve the emd method ' s precision and efficiency , some new algorithms were proposed ; the emd based time - frequency analysis software was designed and developed ; a experiment system at the base of rotor test bed was built to study the ro tor faults diagnosis using the new time - frequency analysis method , then studed several typical faults
本文结合“基于独立分量分析的旋转机械故障诊断新方法的研究”国家自然科学基金项目( 50205025 )和“基于corba分布计算策略构建远程监诊的新方法研究”省自然科学基金项目( 501061 ) ，以面向大型旋转机械故障诊断的时频分析为目标，研究了该方法的基本原理和算法：针对其端点效应等不足，提出了新的数据延拓技术；针对emd算法的精度和速度上的不足，提出了新的改进算法；设计和开发了基于emd时频分析的软件系统；以模拟转子实验台为基础构建了实验系统，并进行了实验研究。 - At last , compared the three data extention technologys merits . the time - series based and neuron network based data extention methods were proposed . chapter four studied the improvement of the emd algorithm al efficiency and precision . reserthed the effect of spline interpolation ' s end condition to the emd algorithm ' s precision , then discussed the low - order and propoed high - order spline interpolation based emd algorithm and their effects
第三章介绍了emd算法端点效应的机理；然后系统地研究了直接信号序列延拓技术、基于时间序列预测和基于神经网络预测的数据序列延拓技术的特点及性能；最后，对各种延拓技术进行了比较研究，分析了各种延拓技术的优缺点。