product family model pfm 产品族模型
The result shows PFM model has some prediction power, and the prediction rate is obviously lower than those in developed countries.
实证结果表明PF M模型在我国具有一定的预测能力，但预测准确率低于在欧美国家的准确率。
The dendrite growth of pure metal in undercooled melts was simulated by using phase field model(PFM) and finite difference schemes.
采用相场模型和有限差分方法，模拟了过冷纯金属熔体的枝晶生长，计算区域为二维正方形均匀网格。
A Primary Factor Model (PFM) for jet engine fault diagnosis is presented, which is a kind of parameter diagnosis method based on the engine fault equation.
提出了发动机故障论断的主因子模型。这是一种基于故障方程的参数诊断方法。
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