Dam break flows and resulting river bed erosion can have disastrous impacts on human safety, infrastructure, environmental quality. However, there is a lack of research the mobility non-uniform sediment mixtures from dam how these differ uniform sized sediment. In this paper, laboratory flume experiments revealed that coarse fine fractions in had higher lower bed-load parameter, respectively, t...

In this work, a brand new passive safety injection system has been designed for the ocean-based Qinshan Phase I nuclear power plant to update and replace traditional active ones. The is made up of high pressure, medium lower pressure system, two-stage automatic depressurization system. To evaluate performance, double-ended cold leg large break LOCA analyzed by best-estimated analysis RELAP5 cod...

Seasonal break-up of landfast sea ice consists of movement and irreversible ice detachment in response to winds or oceanic forces in the late stages of ice decay. The break-up process of landfast sea ice in the Chukchi Sea at Barrow, Alaska was analyzed for the years 2000 through 2010, based on local observations of snow and ice conditions, weather records, image sequences obtained from cameras...

This paper considers the problem of constructing confidence sets for the date of a single break in a linear time series regression. We establish analytically and by small sample simulation that the current standard method in econometrics for constructing such confidence intervals has a coverage rate far below nominal levels when breaks are of moderate magnitude. Given that breaks of moderate ma...

We revise the classic methodology to find the multi-product break-even point. In the current paper we propose a solution to the problem under uncertainty conditions, based on Durán Herrera’s crisp approach [3] and applying fuzzy linear programming. We introduce the concept of approximate break-even for cases in which, due to the nature of the problem, it is not possible to find the break-even p...