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The transformer is a vital equipment in the power system, which is used in large quantities and replaced frequently in industrial projects. Therefore, it is essential to find an efficient automatic detection and recognition method for the text information of the transformer nameplate. At present, the text information of the transformer nameplate is collected manually, which is inefficient. On the other hand, the complex text features of transformer nameplates are a challenge to the existing text recognition algorithms. Therefore, we propose a two-stage network based on deep learning to recognize the nameplate text content automatically. At the same time, we establish a transformer nameplate dataset due to the particularity of the data characteristics of the transformer nameplate. The dataset is used to train our network to improve its sensitivity of the transformer nameplate information. The experimental results show that our model achieves a recognition accuracy of 71% in the transformer nameplate dataset. The test performance of our network on the transformer nameplate dataset is comparable with the state-of-the-art text recognition algorithms.

Probiotics have been associated with clinical infections, toxicity, and antimicrobial resistance transfer, raising public concerns. Probiotic enterococci are emerging food risks as opportunistic pathogens, yet little attention has been paid to them. Herein, we collected 88 enterococcal isolates from probiotic products used for humans, companion animals, livestock, and aquaculture. Results showed that all 88 probiotic enterococcal isolates harbored diverse virulence genes, multiple antimicrobial resistance genes, and mobile genetic elements. Notably, 77 isolates were highly resistant to gentamicin. Representative enterococcal isolates exerted toxic activities in both in vitro and in vivo models. Collectively, our findings suggest that probiotic enterococci may be harmful to hosts and pose a potential threat to public health.

Female, especially for pregnant female, are vulnerable to psychological stress. The morphology and metabolism of the maternal intestine are both obviously changed during pregnancy, thus making intestinal health status more fragile under psychological stress. The aim of the present study was to investigate the role of CRH and CRHR1 in the pregnant maternal intestine under psychological stress, thus exploring the mechanism of psychological stress in the pregnant maternal intestine. Bama miniature pigs were divided into the control and restraint stress groups from the first day of pregnancy. After restraint stress treatment for 18 consecutive days (D18), the plasma, duodenum, jejunum, ileum and colon were collected for study. Pregnant Bama miniature pigs subjected to restraint stress had significantly elevated CRH, adrenocorticotropic hormone (ACTH) and cortisol (COR) levels in plasma. Consistent with the increase in CRH levels, we observed enhanced oxidative stress levels in the intestine, which resulted in intestinal mucosal injury, including impaired intestinal morphology, a reduced number of goblet cells and proliferating cell nuclear antigen-positive cells, decreased expression of MUC2 and tight junctions, and elevated expression of CRHR1 and caspase-3. Moreover, exogenous CRH could directly promote IPEC-J2 cell apoptosis and influence its cell cycle (S and G2 phase) through CRHR1, and antalarmin could alleviate this phenomenon. Therefore, our results illustrated that the intestinal dysfunction of pregnant Bama miniature pigs was caused by restraint stress, and these changes were associated with the enhanced expression of CRH and CRHR1 in the intestine.

A filtering dielectric resonator antenna (FDRA) with wide bandwidth is investigated in this paper. The TE210 mode of the substrate integrated waveguide (SIW) cavity is utilized to feed stacked rectangular dielectric resonators (DRs) for improvement of the gain selectivity. Then, three resonant modes as TE 110 mode, TE 210 mode of SIW and TE 111 mode of DRs are excited. By elaborately arranging the feeding structure and the stacked DRs with different relative permittivity, we can broaden the impedance bandwidth. Three radiation nulls near the lower and higher edges of the gain passband are introduced to improve the gain selectivity. Simulated results of the reflection coefficient, antenna gain and radiation pattern are provided with impedance bandwidth of 19% and average gain of 5.64 dBi within passband.

Background: Helicobacter pylori (Hp) is a unipolar, multi-flagellate, spiral,Gram-negative bacterium that is the only stomach bacterium found in humans.Hp is the leading cause of digestive tract disease and can cause stomach diseases, such as chronic gastritis, peptic ulcer, gastric cancer and gastric mucosa-associated lymphoma. Clinical studies have shown that Hp infection rates are significantly higher in patients with hyperlipidaemia than they are in non-hyperlipidaemic patients. In addition,many studies have shown that the serum vitamin D3 levelsare reduced in patients with obesity and hyperlipidaemia.Lower serum vitamin D3 levels diminish the role of fat cells in storing fat;as a result,fat is released into the bloodstream,leading to elevated blood lipid levels.However, a specificmechanism has not been proposed to explain how VD3 can reduce HP infection in patients with hyperlipidaemia by lowering blood lipids. Methods real-time PCR was used to detect the expression of gastrin in VDR, insign-2 and gastric tissues of mice in each group. The expression of jak, stat 3, cox2 and lkba protein in gastric tissue of mice was detected by western blotting. We also detected the expression of IL-6 and IL-8 in the gastric tissue of mice by Elisa method. The liver tissues of each group were stained with HE to observe the balloon-like changes of liver tissue, and the gastric tissues of mice in each group were stained by HE. The degree of gastritis in each group of mice. Conclusions In this article, we conducted animal experiments using VD3 as an intervention in hp-infected mice and then examined molecular changes in the VDR/Insig-2/SREBP-2 pathways in the mouse liver, the serum cholesterol levels, and the JAK-STAT3 and NF-ĸB pathways.Vitamin D3 further reduced the gastric mucosa cholesterol level,destroyed lipid rafts,and reduced assembly of IL-6 receptor subunits by lowering the circulating cholesterol levels, thereby blocking the JAK-STAT3 signalling pathway. Infection of the gastric mucosa by CagA-positive Helicobacter pylori reduced gastrin secretion and inhibited COX2 expression. Moreover, NF-κB activation and inflammatory cytokine expression were inhibited by blocking the JAK-STAT3 signalling pathway. Furthermore, the degree of infection of the gastric mucosal tissue was reduced.

A novel crawling in-pipe robot was designed to improve the adaptive ability with self-locking principle applied. In the moving, the robot was adaptable to horizontal, vertical and bending pipes with different diameters and sections without exerting additional pressure to the shell. The robot used a telescopic umbrella stand as a basic structure. The force of telescopic mechanism, self-locking principle of supporting mechani sm and shell were deduced from design requirements. The design of supporting and coupling mechanism was completed. The relationship between screw rod thrust and parallelogram driving force was established. A prototype was made and tested according to the suggested design methods. The results show that the robot with powerful traction, good self-locking performance and smooth passage through curve can move forward in the pipe with 90~150 mm inner diameter.