短語詞組短語variance s component estimation 方差分量估計estimation variance of component software 組件軟件可靠性估計方差variance component mod 方差成分模型variance component estimate 方差估計general variance component 方差分量variance component s estimation 方差分量估計variance component analysis 方差成分分析general variance component model 方差分量模型Helmert variance component Helmert 方差分量 返回 variance component