In order to solve the problem of the reliability of slope engineering due to complex uncertainties, the Monte Carlo simulation method is adopted. Based on the characteristics of sparse grid, an interpolation algorithm...In order to solve the problem of the reliability of slope engineering due to complex uncertainties, the Monte Carlo simulation method is adopted. Based on the characteristics of sparse grid, an interpolation algorithm, which can be applied to high dimensional problems, is introduced. A surrogate model of high dimensional implicit function is established, which makes Monte Carlo method more adaptable. Finally, a reliability analysis method is proposed to evaluate the reliability of the slope engineering, and is applied in the Sau Mau Ping slope project in Hong Kong. The reliability analysis method has great theoretical and practical significance for engineering quality evaluation and natural disaster assessment.展开更多
文摘研究了类干酪乳杆菌Lp20241、德氏乳杆菌保加利亚亚种Ld20247、植物乳杆菌Lp20265、鼠李糖乳杆菌Lr20990以及发酵乳杆菌Lf21800共5株乳酸菌(lactic acid bacteria,LAB)发酵后石榴汁(fermented pomegranate juice,FPJ)的理化特性、色泽及相关属性、抗氧化能力以及感官品质的变化。经37℃发酵72 h后,5种FPJ活菌数均在7.0 lg CFU/mL以上,其中发酵乳杆菌发酵的FPJ最高为8.24 lg CFU/mL;其发酵后pH、总可溶性固形物、总糖、总花色苷降低也最多,与未发酵石榴汁相比分别降低了12.40%、8.29%、15.13%和18.30%,对应的总可滴定酸、聚合物颜色、聚合颜色百分比分别增加了157.8%、176.8%和178.2%。5种FPJ的L均显著降低,a和b显著升高,表明发酵后FPJ偏暗红色。发酵后FPJ的总酚含量降低了7.69%~13.62%,但总黄酮含量和抗氧化活性并无显著变化。电子鼻分析和感官评价结果表明不同FPJ的香气和滋味具有显著差异。综上,LAB发酵可以改善石榴汁的感官品质,为石榴汁发酵饮料的开发提供一定的理论依据。
基金Supported by projects of China Ocean Research Mineral Resources R&D Association(COMRA)Special Foundation(DY135-R2-1-01,DY135-46)the Province/Jilin University Co-Construction Project-Funds for New Materials(SXGJSF2017-3)
文摘In order to solve the problem of the reliability of slope engineering due to complex uncertainties, the Monte Carlo simulation method is adopted. Based on the characteristics of sparse grid, an interpolation algorithm, which can be applied to high dimensional problems, is introduced. A surrogate model of high dimensional implicit function is established, which makes Monte Carlo method more adaptable. Finally, a reliability analysis method is proposed to evaluate the reliability of the slope engineering, and is applied in the Sau Mau Ping slope project in Hong Kong. The reliability analysis method has great theoretical and practical significance for engineering quality evaluation and natural disaster assessment.
