The principle of the analog-digital composite compensation technique is described and the factors causing fitting errors arc analyzed. The formula for calculating the maximum error is derived.

还叙述了模-数混合补偿技术的工作原理，分析了引起拟合误差的因素并推导出计算最大误差的公式。

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According to inertia principle, rail undulatory wear inspection system adopts analog digital composite filtering method to process data and eliminates the speed influence on measurement results.

钢轨波磨检测系统根据惯性测量原理，采用模拟—数字混合滤波的数据处理方法，消除了速度对检测结果的影响。

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These numbers are composite numbers from Seagate and Western Digital and include Hitachi GST (and IBM before that companies HDD business became part of Hitachi GST) until 2009 when HGST quit publically reporting their ASPs.

FORBES: Why Government Regulators Should Approve Hard Disk Drive Company Consolidation