Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A General Difficulty Control Algorithm for Proof-of-Work Based
  Blockchains   Designing an efficient difficulty control algorithm is an essential problem
in Proof-of-Work (PoW) based blockchains because the network hash rate is
randomly changing. This paper proposes a general difficulty control algorithm
and provides insights for difficulty adjustment rules for PoW based
blockchains. The proposed algorithm consists a two-layer neural network. It has
low memory cost, meanwhile satisfying the fast-updating and low volatility
requirements for difficulty adjustment. Real data from Ethereum are used in the
simulations to prove that the proposed algorithm has better performance for the
control of the block difficulty.

29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom