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The traditional reliability model is difficult to describe the dynamic behavior and the aging process of the lunar samples storage installation system with the dynamic time serial processes such as the fault detection, the fault recovery, the system aging and so on. Aiming at this problem, this paper uses the generalized stochastic Petri net to establish the reliability model of the lunar samples...
This paper establishes mathematical model of radial lip seals and flow factors method are used to show the influence of aging in oil and wear on such features as pumping rate, friction torque. The root mean square (RMS) roughness is a vital parameter to predict the sealing performance in the model of lip seals. And the RMS of the elastomeric material is intensely influenced by the time of aging in...
Aging is the main failure mechanism of rubber seal ring during the storage period for hydraulic actuator. Considering the influence of temperature, oxygen concentration and mechanical force, this paper presents an integrated aging model based on the volume variation, elasticity modulus and molecular reconfiguration. With the slot flow theory, we get the relationship between the material structure...
To uncouple the defects of activation and apoptosis of T cells from aged mice, we used anti-CD3 plus IL-2 stimulation to induce an activation response and analyzed the subsequent activation-induced cell death (AICD) response of T cells from 16-month-old mice. The results herein demonstrate that T cells from 16-month-old mice could be activated by anti-CD3-induced activation signals but exhibited distinct...
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