In this study, we analyze the aerospace stocks prices in order to characterize the sector behavior. The data analyzed cover the period from January 1987 to April 1999. We present a new index for the aerospace sector and we investigate the statistical characteristics of this index. Our results show that this index is well described by Tsallis distribution. We explore this result and modify the s...

Frequent geopolitical events have reduced the stability of natural gas supply and caused drastic price fluctuations, which poses a new challenge to consumer market. To improve anti-risk ability industrial market, this study constructs customer value portrait framework discern based on different types behavioral features emerging trends Specifically, we rediscover composition customers establish...

vitamin e is a potent reactive oxygen metabolites (rom) scavenger. it is a lipid-soluble vitamin and its main function is to protect polyunsaturated fatty acids against oxidative stress. twenty-five mechanically ventilated intensive care unit (icu) adult patients participated in a prospective randomized clinical trial receiving either placebo (10 patients) or 3 im doses (1000 iu each) of vitami...

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background: freezing is a common way and one of the best methods of seafood preservation for long periods of time; however, the freeze thawing process may influence the quality of food. objectives: oxidation and denaturation of proteins, sublimation and recrystallization of ice crystals can cause changes in the quality of the frozen products. this study was aimed to evaluate the effect of three...

this paper is devoted to the study of establishing sufficient conditions forexistence and uniqueness of positive solution to a class ofnon-linear problems of fractional differential equations. the boundary conditionsinvolved riemann-liouville fractional order derivative and integral. further, the non-linear function $f$ containfractional order derivative which produce extra complexity. thank to...