This paper focuses on the fast rate fault detection filter (FDF) problem for a class of multirate sampled-data (MSD) systems. A lifting technique is used to convert such an MSD system into a linear time-invariant disc...This paper focuses on the fast rate fault detection filter (FDF) problem for a class of multirate sampled-data (MSD) systems. A lifting technique is used to convert such an MSD system into a linear time-invariant discrete-time one and an unknown input observer (UIO) is considered as FDF to generate residual. The design of FDF is formulated as an H∞ optimization problem and a solvable condition as well as an optimal solution are derived. The causality of the residual generator can be guaranteed so that the fast rate residual can be implemented via inverse lifting. A numerical example is included to demonstrate the feasibility of the obtained results.展开更多
目的 在护士中进行Nordic肌肉骨骼问卷的重测信度评价,以期为该问卷在不同职业人群中的信度评价提供补充资料.方法 依据自评量表跨文化调试流程指南（Guidelines for the process of cross-cultural adaptation of self report measure...目的 在护士中进行Nordic肌肉骨骼问卷的重测信度评价,以期为该问卷在不同职业人群中的信度评价提供补充资料.方法 依据自评量表跨文化调试流程指南（Guidelines for the process of cross-cultural adaptation of self report measures）翻译Nordic问卷.于本院护士中招募120名受试者,1周内先后2次行问卷调查,进行问卷的重测信度分析.结果 前后2次调查结果之间具有较高的一致性：Kappa系数为0.72～1.00.结论 Nordic问卷在护士中的应用具有较高的重测信度,可以用于该人群中肌肉骨骼疾病的筛查与流行病学调查.展开更多
基金Supported by National Natural Science Foundation of P. R. China (60374021)the Natural Science Foundation of Shandong Province (Y2002G05)the Youth Scientists Foundation of Shandong Province (03BS091, 05BS01007) and Education Ministry Foundation of P. R. China (20050422036)
文摘This paper focuses on the fast rate fault detection filter (FDF) problem for a class of multirate sampled-data (MSD) systems. A lifting technique is used to convert such an MSD system into a linear time-invariant discrete-time one and an unknown input observer (UIO) is considered as FDF to generate residual. The design of FDF is formulated as an H∞ optimization problem and a solvable condition as well as an optimal solution are derived. The causality of the residual generator can be guaranteed so that the fast rate residual can be implemented via inverse lifting. A numerical example is included to demonstrate the feasibility of the obtained results.
文摘目的 在护士中进行Nordic肌肉骨骼问卷的重测信度评价,以期为该问卷在不同职业人群中的信度评价提供补充资料.方法 依据自评量表跨文化调试流程指南（Guidelines for the process of cross-cultural adaptation of self report measures）翻译Nordic问卷.于本院护士中招募120名受试者,1周内先后2次行问卷调查,进行问卷的重测信度分析.结果 前后2次调查结果之间具有较高的一致性：Kappa系数为0.72～1.00.结论 Nordic问卷在护士中的应用具有较高的重测信度,可以用于该人群中肌肉骨骼疾病的筛查与流行病学调查.
