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于 2014-05-29 发布文件大小:981KB

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包络分析大多在原始振动加速度信号基础上进行，受噪声干扰等因素的影响较大通过对原始振动信号自相关函数作包络分析，可以有效地抑制噪声，突出反映故障调制特征(s． Most of the envelope analyses are based on original vibration accelera- tion signal，which is seriously influenced by noise interference． The noise is effectively suppressed by envelop analysis of auto correlation function of original vibration signal，and the modulation characteristics of fault are highlighted．)

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LMD的LabVIEW实现及在滚动轴承故障诊断中的应用_唐贵基.pdf,1142732,2014-01-15

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julei
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Pvi
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一个基于空时分组编码的MIMO_OFDM通信系统的仿真设计。此系统包括QPSK调制解调，IFFT调制，空时编解码，基于训练符号的信道估计等通信模块。(A space-time block coding based on the MIMO_OFDM communication system simulation design. This system consists of QPSK modulation and demodulation, IFFT modulation, space-time coding and decoding, based on training symbols such as communication channel estimation module.)

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