orthogonal function fitting
orthogonal function fitting
正交函数拟合
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The mathematical model based on orthogonal function as fan characteristic curve fitting is introduced and its precision and utility is validated through the calculating example.
介绍了采用正交函数法快速拟合通风机性能曲线的数学模型，通过算例验证了此数学模型的精确性和实用性。
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