Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fast implementation of synchrosqueezing transform based on downsampling
  for large-scale vibration signal analysis   Synchrosqueezing transform (SST) is a useful tool for vibration signal
analysis due to its high time-frequency (TF) concentration and reconstruction
properties. However, existing SST requires much processing time for large-scale
data. In this paper, some fast implementation methods of SST based on
downsampled short-time Fourier transform (STFT) are proposed. By controlling
the downsampling factor both in time and frequency, combined with the proposed
selective reassignment and frequency subdivision scheme, one can keep a balance
between efficiency and accuracy according to practical needs. Moreover, the
reconstruction property is available, accomplished by an approximate but direct
inverse formula under downsampling. The effects of parameters on the
concentration, computing efficiency, and reconstruction accuracy are also
investigated quantitatively, followed by a mathematic model of reassignment
behavior with decimate factors. Experimental results on an aero-engine and a
spindle show that the fast implementation of SST can effectively characterize
the non-stationary characteristics of the large-scale vibration signal to
reveal the mechanism of mechanical systems.

8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int