An Experimental Study of the Influence of Woman’s Studies Courses in College on the Values of Female College Students

Women’s studies/gender studies courses, aiming to foster proper gender values and healthy personalities among college students with theoretical achievements of interdisciplinary gender researches, to advocate their harmonious and comprehensive development both physically and mentally, play a unique role in college curriculum teaching along with many other subjects. Selecting from women’s studies courses taught in college, this article discusses whether and how women’s studies course influence the values of female college students, major influential factors in course teaching, etc, based on the influence of women’s studies courses on value building of female college students. Research statistics indicate as following: (a) Female college students who have taken courses on women’s studies gain an advantage over those who have not in terms of value levels and subentries (vocational/ aesthetic /marital values) in the fixed-group comparison experiment; (b) Courses on women’s studies exert a favorably continuity in influence on the values of female college students, and long term effect is better than the short term; (c) “Students’ attitude towards the courses” and “degree of class participation” are the two major influential factors in women’s studies course in light of the influence on the values of female college students. Course teaching of women’ studies effectively improves the values of female college students. 

Polyrotaxane: New generation of sustainable, ultra-flexible, form-stable and smart phase change materials.

The development of thermal energy storage materials is the most attractive strategy to harvest the solar energy and increase the energy utilization efficiency. Phase change materials (PCMs) have received much attention in this research field for several decades. Herein, we reported a new kind of PCM micro topological structure, design direction, and the ultra-flexible, form-stable and smart PCMs, polyrotaxane. The structure of polyrotaxane was fully confirmed by 1H nuclear magnetic resonance, attenuated total reflection-fourier transform infrared and X-ray diffraction. Then the tensile properties, thermal stability in the air, phase change energy storage and shape memory properties of the films were systematically analyzed. The results showed that all the mechanical performance, thermal stability in air and shape memory properties of polyrotaxanes were enhanced significantly compared to those of polyethylene oxide (PEO). The form stability at temperatures above the melting point of PEO significantly increased with the α-CD addition. Further with the high phase transition enthalpy and excellent cycle performance, the polyrotaxane films are therefore promising sustainable and advanced form-stable phase change materials for thermal energy storage. Notably, its ultra-high flexibility, remolding ability and excellent shape memory properties provide a convenient way for the intelligent heat treatment packaging of complex and flexible electronic devices. In addition, this is a totally novel insight for polyrotaxane application and new design method for form-stable PCMs.post-print4492 K

Super-resolution reconstruction of digital rock CT images based on residual attention mechanism

Computer tomography technology is widely used in geological exploration because it is a nondestructive and three-dimensional imaging method that can be integrated with computer simulation. However, the large-scale application of the computer tomography technique is limited by economic costs and time consumption. Therefore, it is challenging and intractable to indicate the pore structure characteristics of rock. To address this issue, a super-resolution reconstruction algorithm based on convolutional neural networks, residual learning, and attention mechanism was proposed to generate super-resolution images in this study. This algorithm was applied to the reconstruction of carbonate rock and sandstone. The performance of two-dimensional image reconstruction was evaluated by quantitative extraction and qualitative visualization. The results from experiments indicate that the built model performs well on different upscaling factors and is superior to the existing super-resolution approaches based on convolutional neural network.Cited as: Shan, L., Bai, X., Liu, C., Feng, Y., Liu, Y., Qi, Y. Super-resolution reconstruction of digital rock CT images based on residual attention mechanism. Advances in Geo-Energy Research, 2022, 6(2): 157-168. https://doi.org/10.46690/ager.2022.02.0

Optimal State Estimation for Discrete-Time Markov Jump Systems with Missing Observations

This paper is concerned with the optimal linear estimation for a class of direct-time Markov jump systems with missing observations. An observer-based approach of fault detection and isolation (FDI) is investigated as a detection mechanic of fault case. For systems with known information, a conditional prediction of observations is applied and fault observations are replaced and isolated; then, an FDI linear minimum mean square error estimation (LMMSE) can be developed by comprehensive utilizing of the correct information offered by systems. A recursive equation of filtering based on the geometric arguments can be obtained. Meanwhile, a stability of the state estimator will be guaranteed under appropriate assumption

Astaxanthin protects against diabetic cardiomyopathy via activation of Akt pathway in H9c2 cells

Purpose: To investigate the cardioprotective action of astaxanthin, and to elucidate its underlying mechanism of action in H9c2 cells.Methods: Cell viability was determined by MTT assay. Intracellular reactive oxygen species (ROS) were evaluated using 2, 7-dichlorodihydro-fluorescein diacetate (H2DCFDA) staining. Cell apoptosis were assessed by determining caspase activities using colorimetric assay. The apoptotic cells were labelled with annexin V/PI staining and quantified by flow cytometry. Involvement of Akt signaling pathway was verified using western blot.Results: The results revealed that astaxanthin (5 and 10 μM) dose-dependently reversed high glucoseinduced cell viability loss in H9c2 cells (p < 0.01 and p < 0.001, respectively). Astaxanthin inhibited intracellular ROS production, decreased caspase 3 and caspase 9 activities in high glucose-challenged H9c2 cells in a concentration-related manner (p < 0.05). Besides, astaxanthin markedly inhibited the number of apoptotic H9c2 cells induced by high glucose. Furthermore, western blot analysis demonstrated that astaxanthin upregulated the activation of Akt signaling.Conclusion: Astaxanthin may protect high glucose induced diabetic cardiomyopathy via activation of Akt pathway, and thus deserves further investigation as a cardioprotective agent.Keywords: Astaxanthin, Diabetic cardiomyopathy, Cardiomyocyte, Apoptosis, Akt pathwa