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小流量、低水头观测泉脱-集气装置改造实验研究——以延庆松山泉气氡为例 被引量:1
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作者 高玲 周永刚 +1 位作者 吕毅夫 乔永军 《中国地震》 北大核心 2021年第3期728-736,共9页
小流量、低水头观测泉使用常规脱-集气装置,达不到观测气量的要求,会直接影响化学气体观测质量。本文以松山观测泉为研究对象,结合台站观测条件,通过技术改造和实验研究,制作了恒流溅落式脱-集气装置,对气氡观测结果进行了连续观测分析... 小流量、低水头观测泉使用常规脱-集气装置,达不到观测气量的要求,会直接影响化学气体观测质量。本文以松山观测泉为研究对象,结合台站观测条件,通过技术改造和实验研究,制作了恒流溅落式脱-集气装置,对气氡观测结果进行了连续观测分析,获得了完整的年动态变化曲线。观测结果表明,该脱-集装置能够较好地解决小流量、低水头观测泉存在的流量、气量、水量不稳定的问题,使气氡观测的稳定性得到明显提高,为全国其他小流量、低水头观测泉脱-集气装置的技术改进提供了范例。 展开更多
关键词 小流量低水头泉 脱-集气装置 改造实验 观测基线
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Design of observer-based discrete repetitive-control system based on 2D model
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作者 王昭鸿 易灵芝 +1 位作者 兰永红 陈才学 《Journal of Central South University》 SCIE EI CAS 2014年第11期4236-4243,共8页
A discrete observer-based repetitive control(RC) design method for a linear system with uncertainties was presented based on two-dimensional(2D) system theory. Firstly, a 2D discrete model was established to describe ... A discrete observer-based repetitive control(RC) design method for a linear system with uncertainties was presented based on two-dimensional(2D) system theory. Firstly, a 2D discrete model was established to describe both the control behavior within a repetition period and the learning process taking place between periods. Next, by converting the designing problem of repetitive controller into one of the feedback gains of reconstructed variables, the stable condition was obtained through linear matrix inequality(LMI) and also the gain coefficient of repetitive system. Numerical simulation shows an exceptional feasibility of this proposal with remarkable robustness and tracking speed. 展开更多
关键词 state observer two-dimensional discrete system repetitive control linear matrix inequality
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