Based on the mechanism for mass creation in the space-time with extradimensions proposed in our previous work, (arXiv: 1301.1405 [hep-th] 2013) we consider now the mass spectrum of vector bosons in extradimensions. It...Based on the mechanism for mass creation in the space-time with extradimensions proposed in our previous work, (arXiv: 1301.1405 [hep-th] 2013) we consider now the mass spectrum of vector bosons in extradimensions. It is shown that this spectrum is completely determined by some function of compactification length and closely related to the metric of extradimensions.展开更多
为了更准确的诊断滚动轴承是否发生故障,提出了利用Teager能量算子求LMD分量能量信号,再做其1.5维谱的方法。局部均值分解(Local Mean Decomposition,简称LMD)算法分解得到一组乘积函数分量,每一个分量都可近似看作一个线性平稳的单分...为了更准确的诊断滚动轴承是否发生故障,提出了利用Teager能量算子求LMD分量能量信号,再做其1.5维谱的方法。局部均值分解(Local Mean Decomposition,简称LMD)算法分解得到一组乘积函数分量,每一个分量都可近似看作一个线性平稳的单分量信号。Teager能量算子可以追踪信号瞬态能量,使故障冲击成分突出。1.5维谱具有降低频谱中高斯噪声影响的作用。新的故障诊断方法结合了各方法的优点,能有效地提取滚动轴承故障信号的特征频率及其倍频。通过对实测滚动轴承外圈、滚动体、内圈故障信号的分析,有效地提取了各种故障的特征频率,验证了新方法在滚动轴承故障特征提取中的可靠性。展开更多
文摘Based on the mechanism for mass creation in the space-time with extradimensions proposed in our previous work, (arXiv: 1301.1405 [hep-th] 2013) we consider now the mass spectrum of vector bosons in extradimensions. It is shown that this spectrum is completely determined by some function of compactification length and closely related to the metric of extradimensions.
文摘为了更准确的诊断滚动轴承是否发生故障,提出了利用Teager能量算子求LMD分量能量信号,再做其1.5维谱的方法。局部均值分解(Local Mean Decomposition,简称LMD)算法分解得到一组乘积函数分量,每一个分量都可近似看作一个线性平稳的单分量信号。Teager能量算子可以追踪信号瞬态能量,使故障冲击成分突出。1.5维谱具有降低频谱中高斯噪声影响的作用。新的故障诊断方法结合了各方法的优点,能有效地提取滚动轴承故障信号的特征频率及其倍频。通过对实测滚动轴承外圈、滚动体、内圈故障信号的分析,有效地提取了各种故障的特征频率,验证了新方法在滚动轴承故障特征提取中的可靠性。
