The system mainly consist of four modules: the factor collect reduction based on rough set, multiple linear regression, BP net training and BP net test.
本文还设计了一个标准收入测算系统，该系统主要包括利用粗集理论对因素集进行约简、多元回归分析、BP网络训练和BP网络测试四个测算模块。
Two kinds of four ball test methods are discussed. It proved that the rotation speed is the primary factor effected on results.
通过对两种四球试验法的讨论，证明转速是影响试验结果的主要因素。
Expressions of heat removal factor, efficient factor and time constant of the four types of cavity receiver have been deduced and test for trough solar collector system has been set up.
推导出了四种结构的热迁移因子、效率因子和时间常数等表达式，搭建了槽式太阳能集热器系统，进行了试验测试和验证。
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