The improved nonlinear least squares (I-NLS) location algorithm and the maximum likelihood estimation (MLE) location algorithm were used based on the WSN.

• 在修正的气体污染源浓度衰减模型基础上，提出一种改进的非线性最小二乘算法(I-NLS)以及极大似然算法(MLE)用于气体污染源定位。