In this paper, the damage evolution characteristics of C50 concrete under impact load were studied, based on electro-mechanical impedance (EMI) technique. A parallel test was conducted internal relationship between EMI technology and a resonant frequency to verify sensitivity accuracy technology. addition, another mechanical specimens with different levels establish empirical degree properties ...

Sheep and cow butter oils have high consumption trade rate in the market, but standards regarding type differentiation are lacking. Therefore, objective of this study was to assess distinction main molecular components sheep oils. Sanjabi Holstein butters were produced from milk collected two seasons summer autumn via conventional local method. The including fatty acids, triacylglycerols, stero...

Nonlinearities in the drift and diffusion coefficients influence temporal dependence in scalar diffusion models. We study this link using two notions of temporal dependence: β − mixing and ρ − mixing. We show that β − mixing and ρ − mixing with exponential decay are essentially equivalent concepts for scalar diffusions. For stationary diffusions that fail to be ρ−mixing, we show that they are s...

Freezing-thawing resistance is a very significant characteristic for concrete in severe environment (such as cold region with the lowest temperature below 0°C). In this study, ordinary-air-entrained (O-A-E) concrete was produced in a laboratory environment; the compressive strength, cubic compressive strength of C50, C40, C30, C25, and C20 ordinary-air-entrained concrete, tensile strength, and ...

A recent development in energy and environment decomposition analysis is the application of the technique to cross-country region comparisons. Cross-country region decomposition gives rise to several problems that do not normally occur in chronological decomposition of changes in a specific country. These include large variations in explanatory factors in the data, the measure of economic outpu...

It is well-established that the …nancial time series display some stylized fatcs such as volatility clustering, high kurtosis, low starting and slow-decaying autocorrelation function and the Talyor e¤ect as well. In order to evaluate volatility models’capacity in capturing such facts, we apply both standard and robust measures of kurtosis and autocorrelation of squares to GARCH, EGARCH and ARSV...