The wavelet neural network model to forecast and control equipment development expense is established on the basis of theory and method of wavelet together with its transform.

通过小波及小波变换的原理和方法，建立了适用于武器装备研制费用的小波神经网络预测与控制模型。

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Wal-Mart's fiscal fourth-quarter earnings rose 8.6% helped by a lower tax rate and expense controls, but it forecast flat U.S. same-store sales this quarter.

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