The building of discrete state-space models including system noise provides a basis for the exact identification and effective control.

这种包含系统噪声的离散状态空间模型的建立，为网络化控制系统的准确辨识和有效控制奠定了基础。

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The error analysis proves that this method can realize the exact identification of the structure boundary support stiffness if the modal test results are of enough accuracy.

误差分析表明，如果模态试验结果具有足够的精度，用本文方法能够准确地实现结构边界支承刚度识别。

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Schindler lifts, in use in hundred of high-rise buildings, use technology such as a personal identification card readers or keypads to understand the exact requirements of a user.

BBC: Speeding up work for people with disabilities