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XIAO Kun FANG Shao-ji PANG Yong-jie 《船舶与海洋工程学报》2007,6(2):19-24
To improve underwater vehicle dead reckoning, a developed strong tracking adaptive kalman filter is proposed. The filter is improved with an additional adaptive factor and an estimator of measurement noise covariance. Since the magnitude of fading factor is changed adaptively, the tracking ability of the filter is still enhanced in low velocity condition of underwater vehicles. The results of simulation tests prove the presented filter effective. 相似文献
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The purpose of this study was to investigate the hydrolyzation of aspirin during the process of dissolution testing for aspirin delayed-release tablets. Hydrolysis product of salicylic acid can result ... 相似文献
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在制造和修理船舶交流配电板时，常遇见交流功率表指示不准确的问题。除仪表本身出现的故障或转换开关接触不良，熔断器烧断等原因外，仪表接线不正确或互感器、仪表对应端接线不对也会造成指示不准确。解决接线问题很棘手，如按排列组合的方法调换接线，最多时需要调换47次。我们根据多年的经验就三相有功测量及三相功率表的接线作一简单的分析，从中摸索出一套改正功率表错误接线的方法。 相似文献
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The large testing platform for immersed tunnel is established to analyze the distribution laws of the temperature field and its influencing factors when a tunnel fire breaks out. Meanwhile, the combination method of physical testing (1∶1 full scale fire test) and numerical calculation FDS are applied. Some conclusions are drawn as follows: (1) Longitudinal wind speed within limits can decrease the maximum temperature of tunnel crown top effectively when fire breaks out in tunnel. (2) The maximum temperature of tunnel crown top and fire behavior are related to fire types obviously. (3) The high temperature resistance safe position of the tunnel equipment is below 3.5 m of tunnel sidewall in case of fire source heat quantity of 50 MW. (4) The fire maximum temperature is positively related to heat release rate (HRR) and longitudinal wind speed. 相似文献