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The relation psychological relation among job satisfaction, stress level and self-efficacy of safety personnel in coal mine was investigated by a questionnaire survey conducted to 43 employees in a coal mine in china. The results shows:Stress level could predict job satisfaction negatively; self-efficacy could not only predict job satisfaction positively, but also adjust the effect of stress level...
In consideration of maneuvering spacecraft, the uncertainty of thrust acceleration will cause enormous error to model and track the accelerating motion, it's reasonable to think that the measurements mainly reflect the uncertainty of the thrust acceleration. This paper focuses on modeling and building on-line filter to identify the continuous thrust acceleration to compensate the uncertainty of the...
The uncertainty of thrust acceleration will cause enormous error to model and track the accelerated motion of maneuvered target during orbit transfer process. An on-line minimum-variance estimator was developed for thrust acceleration applied to orbit transfer using discrete-time radar measurements. The mass-flow-rate of propellant was selected as a state variant, which was estimated by employing...
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