if ( (0<= cur_t) && (cur_t < NOISE_HISTORY) ) {
noiseData[node_id].noiseGenTime = cur_t;
noiseData[node_id].key[cur_t] = search_bin_num(noiseData[node_id].noiseTrace[cur_t]);
if ( (0<= cur_t) && (cur_t < NOISE_HISTORY) ) {
noiseData[node_id].noiseGenTime = cur_t;
noiseData[node_id].key[cur_t] = search_bin_num(noiseData[node_id].noiseTrace[cur_t]);