China Three Gorges University

About: China Three Gorges University is a education organization based out in Yichang, China. It is known for research contribution in the topics: Catalysis & Landslide. The organization has 11161 authors who have published 8011 publications receiving 82224 citations. The organization is also known as: Sanxia Daxue.

Small pyramidal textured ultrathin crystalline silicon solar cells with double-layer passivation.

Abstract: Ultrathin crystalline silicon solar cells are a promising technology roadmap to achieve more cost effectiveness. However, experimental reports on ultrathin crystalline silicon cells with thickness less than 20 µm are rare. Here, we experimentally fabricate and investigate ultrathin monocrystalline silicon solar cells consisting of 16 µm-silicon base thickness and low-cost front random pyramidal texture with the feature size of 1-2 µm. The normalized light absorption is calculated to explain the measured external quantum efficiency. The achieved efficiency is 15.1% for the single-layer passivated textured solar cell. In addition, via double-layer passivation of Al2O3/SiNx, the efficiency is further increased to 16.4% for the best textured cell, which significantly improves the absolute efficiency with Δη = 1.3%.

A Novel HTS Modulated Coaxial Magnetic Gear With Eccentric Structure and Halbach Arrays

Abstract: In order to improve the high torque density of coaxial magnetic gear, a novel high temperature superconducting (HTS) bulks coaxial magnetic gear (CMG) with an eccentric pole of inner rotor and Halbach arrays of outer rotor is proposed in this paper. According to the Meissner effect, the HTS bulks replace the traditional epoxy resin to improve the flux-modulation effect. Moreover, the HTS bulks CMG has an eccentric structure of permanent magnets (PMs) on inner rotor and has Halbach PMs arrays on the outer rotor. The proposed HTS bulks CMG topology with 4 inner and 23 outer pole pairs is established. The topology performance is assessed and verified by finite element analysis.

Saccharomyces boulardii as an adjuvant therapy for Helicobacter pylori eradication: A systematic review and meta-analysis with trial sequential analysis.

Abstract: Background and aims Whether Saccharomyces boulardii (S boulardii) as an adjuvant therapy are beneficial to H pylori eradication remains controversial. The aim of the study was to update and determine the effects of S boulardii as an adjuvant therapy on H pylori eradication rates and adverse effects. Methods We searched PubMed, Embase, CENTRAL, and Web of Science to collect all randomized controlled trials assessing the effects of S boulardii as an adjuvant therapy for H pylori eradication from inception to February 2019. Quality of evidence was appraised using Grading of Recommendations, Assessment, Development and Evaluation system. Trial sequential analysis was performed to control the risk of type I and type II errors. Results Eighteen trials with 3592 patients were eligible for meta-analysis. Compared with standard eradication regimen, the S boulardii supplementation could significantly improve eradication rates [risk ratio (RR) = 1.09, 95% confidence interval (CI):1.05-1.13; moderate quality evidence] and reduce the incidence of total side effects (RR = 0.47, 95%CI:0.36-0.61; low quality evidence), as well as some gastrointestinal adverse effects, especially diarrhea (RR = 0.33, 95%CI:0.23-0.47; low quality evidence) and constipation (RR = 0.37, 95%CI:0.23-0.57; moderate quality evidence). In addition, the need for discontinuation rate in S boulardii supplementation group was significantly lower than in the control group (RR = 0.33, 95%CI:0.16-0.69, P = .003; moderate quality evidence). The TSA results for overall eradication rates and total side effects indicated that the effects were conclusive. Conclusions Our meta-analysis shows that S boulardii supplementation on standard eradication therapy significantly increased H pylori eradication rates and reduced the incidence of total side effects and some gastrointestinal adverse effects during eradication therapy.