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| 1 | A Fault-tolerance Estimating Method for Ionosphere Corrections in Satellite Navigation System显示文摘Aiming to the reliable estimates of the ionosphere differential corrections for the satellite navigation system in the presence of the ionosphere anomaly, a fault-tolerance estimating method, which is based on the distributed Kalman filtering, is proposed. The method utilizes the parallel sub-filters for estimating the ionosphere differential corrections. Meanwhile, an infinite norm (IN) method is proposed for the detection of the ionosphere irregularity in the filter processing. Once the anomaly is detected, the sub-filter contaminated by the anomaly measurements will be excluded to ensure the reliability of the estimates. The simulation is conducted to validate the method and the results indicate that the anomaly can be found timely due to the novel fault detection method based on the infinite norm. Because of the parallel sub-filter architecture, the measurements are classified by the spatial distribution so that the ionosphere anomaly can be positioned and excluded more easily. Thus, the method can provide the robust and accurate ionosphere differential corrections. | GAO Shuliang LI Rui HUANG Zhigang | 2011 | Chinese Journal of Aeronautics2011，24，6： | 2 |
| 2 | 大鼠食道扭转生物力学特性显示文摘目的食道的主要功能与力学性质密切相关 ,通过对食道进行拉伸、充压、扭转 ,定量地测量食道被动扭转生物力学特性。方法应力应变的计算采用薄壁筒模型 ,认为食道在轴向和环向两个方向的应力沿壁厚均匀分布 ,而忽略径向的应力和其他横向剪应力。结果实验表明 ,在一定的伸长比和内压下 ,扭矩和扭转角度呈线性关系 ,剪切模量可由扭矩、扭转角度以及在此状态下的极惯量计算而得 ;剪切模量不随剪应力和剪应变的变化而变化 ,改变轴向伸长比和透壁压将使剪切模量产生变化。结论在伸长比一定的充压过程中 ,剪切模量与透壁压、轴向应力呈线性关系。在透壁压一定的伸长过程中 ,剪切模量与轴向伸长比、轴向应变呈非线性关系。 | 杨坚 廖东华 高松 曾衍钧 赵静波 H.Gregersen | 2004 | 航天医学与医学工程2004，17，2： | 0 |
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