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Massive Open On-line Courses (MOOCs) are being launched with increasing frequency through aggregators such as Coursera, Udacity and edX, and this mode of delivery is evolving rapidly. Key pedagogical issues include: • packaging content to suit a student cohort with widely different backgrounds; • avoiding over-simplification of material and maintaining rigor; and • developing the correct mix of assessment...
Based on the laboratory experiment of steel fiber reinforced concrete (SFRC), a total of 10 specimens have been designed according to the aggregate interface condition, steel fiber ratios and different-strength concrete. These specimens were computed by MFPA2D in micro-structure level. Comparing the result of SFRC with plain concrete beams, this paper validated the positive effect of steel fiber in...
Risk analysis of tunnel lining is a vital and complex problem. This paper presents a metrology for risk analysis of tunnel lining by employing fault tree theory and entropy measurement. Some risk factors of tunnel lining are first identified. A lining fault tree analysis model is then established. Next, the entropy and entropy weight are applied to the risk analysis of tunnel lining. Finally, a definition...
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