Search

This study delves into the factors that affect the reliability of satellite antenna deployment mechanisms. It employs the Kolmogorov–Smirnov (K‐S) test to quantify uncertainty characteristics, leading to the acquisition of pertinent stochastic parameters. Subsequently, three‐dimensional models and finite element models of the satellite antenna deployment mechanism are established using SOLIDWORKS and ANSYS software. Modal distribution, harmonic response analysis, random vibration analysis, and deployment process simulation are conducted. Parameterized modeling of the deployment mechanism's dynamics simulation process is performed, taking into consideration parameter uncertainty. Finally, a Kriging surrogate model is utilized to formulate an approximate expression between the factors influencing the reliability of the antenna deployment mechanism and its dynamic response. Based on the general stress‐strength interference theory, a reliability analysis model is constructed. Combined with active learning algorithms, this approach achieves efficient and precise calculations of the reliability of the satellite antenna deployment mechanism. [ABSTRACT FROM AUTHOR]

The characteristics of this tandem approach are the consecutive C-Br bond cleavage, C-H functionalization, and the C-O bond formation. [ABSTRACT FROM AUTHOR]

Microwave promoted reaction of 3-dehydroshikimate (I) with primary amines or the hydrazone (IV) and 1,2-dichloroethane as bisnucleophile permits the efficient synthesis of 1,4-benzoxazines. [ABSTRACT FROM AUTHOR]

This facile and metal-free protocol affords benzoxazinone derivatives in a one-pot manner through sequential reaction between dehydroshikimate, anilines, and bifunctional chloroalkyl esters. [ABSTRACT FROM AUTHOR]