Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Time Delay Dynamic System with External Source for the Local Outbreak
  of 2019-nCoV   How to model the 2019 CoronaVirus (2019-nCov) spread in China is one of the
most urgent and interesting problems in applied mathematics. In this paper, we
propose a novel time delay dynamic system with external source to describe the
trend of local outbreak for the 2019-nCoV. The external source is introduced in
the newly proposed dynamic system, which can be considered as the suspected
people travel to different areas. The numerical simulations exhibit the dynamic
system with the external source is more reliable than the one without it, and
the rate of isolation is extremely important for controlling the increase of
cumulative confirmed people of 2019-nCoV. Based on our numerical simulation
results with the public data, we suggest that the local government should have
some more strict measures to maintain the rate of isolation. Otherwise the
local cumulative confirmed people of 2019-nCoV might be out of control.

11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph