Algorithm 1: Preprocessing in ARM.
	Input: Number of participant N = {1, 2,…, n}, sensing data S = {s1, s2, …, sn} of n participants
	Output: $M=\{m_1^f,m_2^f,\dots ,m_n^f\}$
1	for i = 1 to n do
2	Mi ← initial_value;
3	while convergence do
4	Compute A using Equation (1);
5	for t = 1 to l do
6	Compute $m_i^t$ using Equation (2);
7	end
8	convergence $\leftarrow m_i^t-m_i^{t-1}(m_i^0=m_i)$;
9	end
10	$m_i^f\leftarrow m_i^t$
11	end