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Finite element modeling and structural dynamic characteristics of antenna pedestal in airborne SAR were studied in this paper. The Finite element model of antenna pedestal in airborne SAR was set up on the basis of structural dynamic theory, then, the key technologies of dynamic simulation were pointed out, and the modal analysis and transient analysis were carried out. Simulation results show that the dynamic characteristics of antenna pedestal in airborne SAR can meet the requirements of servo bandwidth and structural strength. The fast finite element modeling and simulation method proposed in this paper are of great significance to the weight reducing design of antenna pedestal in airborne SAR.

The article presents a study on the epidemiology of Haemophilus parasius, the etiologic agent of Glässers disease, which causes high morbidity and mortality rates in China. It focuses on the analysis of the H. parasius strain through enterobacterial repetitive intergenic consensus polymerase chain reaction (ERIC-PRC). It states that ERIC-PRC is indicated to assess the prevalence and identify the genotypes of H. parasius in a region.

Objective: To evaluate the pregnancy outcomes and neurodevelopment prognosis of subjects prenatally diagnosed with fetal ventriculomegaly (VM)., Methods: All the subjects with VM diagnosed by ultrasound and were admitted and treated at West China Second Hospital, Sichuan University between March 2011 and September 2020 were retrospectively enrolled for a chohort study, while non-VM subjects of the same period were selected with a random number table to form the control group. Pregnancy outcomes of the two groups were compared, and the fetuses of both groups were followed up after birth for further assessment and comparison of their neurodevelopmental prognosis., Results: The live birth rate of the VM group was lower than that of the control group (77.63% [229/295] vs. 94.31% [265/281], P <0.001). Furthermore, the proportion of subjects that were transferred to NICU for monitoring and observation after birth was higher in the VM group than that of the control group (20.96% [48/229] vs. 4.53% [12/265], P <0.001). During the follow-up, it was found that the rate of neurodevelopmental abnormalities of the VM group was significantly higher than that of the control group (11.79% [27/229] vs. 1.90% [5/265], P <0.001). Moreover, neurodevelopmental abnormalities of VM fetuses were correlated to the following factors, the degree of VM ( P =0.010), intrauterine progression of VM ( P =0.024), and whether the postnatal cranial ultrasound result was suggestive of VM ( P =0.001). In addition, postnatal cranial ultrasound suggestive of VM was found to be an independent risk factor for neurodevelopmental abnormalities ( OR =9.434, 95% CI : 1.791-49.688, P =0.008)., Conclusion: VM reduces the fetal live birth rate and may increase the risks of neurodevelopmental abnormalities after birth. All VM fetuses should be closely followed up for neurodevelopment status after birth, especially those with severe VM, intrauterine progression, and postnatal cranial ultrasound indicative of VM., (Copyright© by Editorial Board of Journal of Sichuan University (Medical Sciences).)