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The paper studies three typical weighting strategies for Shell-Neighbor Imputation (SNI) algorithm, while there are many weighting modes that can be used in the SNI. To best capture the imputation efficiency, a new metrics, called goodess, is proposed for evaluating imputation algorithms. We conduct some experiments for examining the proposed approached, and demonstrate that (1) distance-frequency-weighting...
The expectation maximization (EM) algorithm is available for Gaussian mixture density estimation. However, if there is not an appropriate initialization, the iterative computation will stop at initialization trap and lead to improper estimation. In this paper, the moment-EM algorithm is proposed to overcome the problem. It means to compute the moment-estimation of parameter and initialize parameter...
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