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Effect of low frequency electromagnetic field on microstructures and macrosegregation of horizontal direct chill casting aluminum alloy ZHAO Zhi-hao(赵志浩), CUI Jian-zhong(崔建忠), DONG Jie(董 杰... of low frequency electromagnetic field on cast surface, microstructures and macrosegregation in horizontal direct chill(HDC) casting process were investigated experimentally. The cast surfaces......
fault characteristic frequency(IFCF). However, in an environment with a low signal-to-noise ratio (SNR), e.g., an incipient fault or function at a low speed, the signal contains strong background noise... vibration signals at a low SNR. Key words: rolling element bearing; low signal-to-noise ratio; empirical mode decomposition soft-thresholding denoising; instantaneous fault characteristic frequency......
several low-complexity equalizers that adopted inter-carrier interference (ICI) properties due to frequency offset. HOU and CHEN [11] proposed an MMSE detector with a parallel interference.... (2) The TF-LMS scheme can cancel the frequency offsets with low complexity. Compared with the convention cancellation scheme, the proposed method has good behavior for the offset cancellation......
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; Natural frequency of tapered high pier considering pile-soil interaction ZHAO Ming... design of tapered high pier, the analysis of natural vibration frequency is of great importance. According to the engineering features of tapered high pier in mountainous area, a vibration......
Mechanism of Residual Stress Reduction in Low Alloy Steel by a Low Frequency Alternating Magnetic TreatmentYanli Song and Lin Hua School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China摘 要:Residual stress reduction in low alloy steel by a low frequency alternating magnetic treatment and its mechanism were......
and solidification during low frequency electromagnetic casting of 7xxx aluminum alloys: Part II. The effects of electromagnetic parameters on casting processes [J]. Materials Science and Engineering......
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will decrease with frequency. And the values of the coercive fields are 1.15, 0.95 and 0.63, respectively. One reason for this could be that the polarization switched under a low field frequency... energy, so hysteresis loop is usually measured in low frequency. LOHSE et al[3] have observed that the coercive field increases with the frequency in PZT thin films. We can see that the trend......
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