The model USES the variation coefficient as parameter, which reflects eigenvalue difference to represent the weight of evaluation indexes, decreases the subjectivity of weight decision.
该模型采用反映评价指标特征值之间的差异性的参数变异系数作为评价指标的权重，减少了权重确定的主观性。
The variation of heat loss rate with the vacuum degree, the effect of vacuum degree on the heat loss, the variation of overall heat loss coefficient with the temperature difference are found.
得出了热损速率随真空度的变化规律和总热损系数随温差的变化关系。
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