Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiscale Event Detection in Social Media   Event detection has been one of the most important research topics in social
media analysis. Most of the traditional approaches detect events based on fixed
temporal and spatial resolutions, while in reality events of different scales
usually occur simultaneously, namely, they span different intervals in time and
space. In this paper, we propose a novel approach towards multiscale event
detection using social media data, which takes into account different temporal
and spatial scales of events in the data. Specifically, we explore the
properties of the wavelet transform, which is a well-developed multiscale
transform in signal processing, to enable automatic handling of the interaction
between temporal and spatial scales. We then propose a novel algorithm to
compute a data similarity graph at appropriate scales and detect events of
different scales simultaneously by a single graph-based clustering process.
Furthermore, we present spatiotemporal statistical analysis of the noisy
information present in the data stream, which allows us to define a novel
term-filtering procedure for the proposed event detection algorithm and helps
us study its behavior using simulated noisy data. Experimental results on both
synthetically generated data and real world data collected from Twitter
demonstrate the meaningfulness and effectiveness of the proposed approach. Our
framework further extends to numerous application domains that involve
multiscale and multiresolution data analysis.

28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg