In order to explore the feasibility of preparing frequency selective fabrics by computer embroidery technology, two complementary ring-shaped structures were selected for design in this paper. Several samples with different size parameters were prepared by the computer embroidery process, and the electromagnetic transmission characteristics were systematically tested using the free-space method. The effects of unit type, electromagnetic wave polarization mode, incident angle, unit size parameters and processing methods on different samples were analyzed in depth. The results show the aperture-type and patch-type samples have obvious band-pass and band-stop characteristics in the test frequency range, respectively, but there are some differences in the resonance frequency and peak of the complementary structure samples of the same size. Different parameters have dissimilar influences on the electromagnetic transmission characteristics. With the increase in incident angle, the frequency selective characteristics of two complementary structures are gradually weakened, and the aperture structure has higher angular stability. Under the conditions of different electromagnetic wave polarization modes and incident angles, the computer embroidery samples have good frequency selective characteristics, which demonstrates the effectiveness of computer embroidery processing technology. However, compared with the ideal computer-based carving sample, there is a certain gap in the resonance peak, and the electromagnetic loss is large. The processing accuracy of the computer embroidery technology needs to be explored further.

Ultrabithorax (Ubx) is a member of the Hox gene group involved in cell fate decisions, cell proliferation and organ identity. Its function has been extensively researched in Drosophila melanogaster but little is known about it in Lepidoptera. To uncover the function of Ubx in the development of lepidopterans, we constructed the Ubx overexpression (Ubx^OE) strain based on the Nistari strain of Bombyx mori. The Ubx^OE strain showed a small body size, transparent intersegmental membrane and abnormal posterior silk gland (PSG). In the current study, we focused on the effect of Ubx overexpression on the posterior silk gland. As the major protein product of PSG, the mRNA expression of fibroin heavy chain (Fib-H) and fibroin light chain (Fib-L) was upregulated three times in Ubx^OE, but the protein expression of Fib-H and Fib-L was not significantly different. We speculated that the overexpression of Ubx downregulated the expression of Myc and further caused abnormal synthesis of the spliceosome and ribosome. Abnormalities of the spliceosome and ribosome affected the synthesis of protein in the PSG and changed its morphology.