准确的套利交易意味着卖出或买进股指期货合约的同时，买进或卖出与其相对应的股票组合。如果实际交易的现货股票组合与指数的股票组合不一致，势必倒是两者未来的走势或回报不一致，从而导致一定的误差。这种误差，通常称为模拟误差（Tracking Error）。
The curve of flux characteristic which simulated and tested is compared. It is analyzed the numerical simulation error causation and the way to reduce it.
依照有关国家标准,设计建立了RTZ-21/50FS(Q)型燃气调压器试验系统,对试验样机进行了调压特性试验,并将数值模拟出的流量特性曲线和实测的流量特性曲线进行了对比,分析了产生模拟误差的原因和减小模拟误差的途径。
参考来源 - 燃气调压器数值模拟与试验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
模拟的瞬态响应曲线与实验曲线较为一致，模拟误差在10%以内。
The numerical curve exhibits very good agreement with experimental results, and simulation error is less than 10%.
结果显示五种模型在可见光和近红外波段的模拟误差都小于0.0003。
The biases of all the models are less than 0.0003 in both visible and near-infrared regions.
运用自适应FIR滤波器来设计内模控制的控制器，采用IIR滤波器模拟误差通道。
An adaptive FIR filter is adopted as a controller in internal model control process and an IIR filter is used to simulate the error channel.
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