Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measuring and Modelling Crowd Flows - Fusing Stationary and Tracking
  Data   The two main data categories of vehicular traffic flow, stationary detector
data and floating-car data, are also available for many Marathons and other
mass-sports events: Loop detectors and other stationary data sources find their
counterpart in the RFID tags of the athletes recording the split times at
several stations during the race. Additionally, more and more athletes use
smart-phone apps generating track data points that are the equivalent of
floating-car data. We present a methodology to detect congestions and estimate
the location of jam-fronts, the delay times, and the spatio-temporal speed and
density distribution of the athlete's crowd flow by fusing these two data
sources based on a first-order macroscopic model with triangular fundamental
diagram. The method can be used in real-time or for analyzing past events.
Using synthetic "ground truth" data generated by simulations with the
Intelligent-Driver Model, we show that, in a real-time application, the
proposed algorithm is robust and effective with minimal data requirements.
Generally, two stationary data sources and about ten "floating-athlete"
trajectories per hour are sufficient.

5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph