Jinguang Yang, Feng Zhao, Min Zhang^*, Yan Liu, Xiaofang Wang

CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.3, pp. 935-953, 2021, DOI:10.32604/cmes.2021.014176 - 19 February 2021

Abstract For a radial inflow turbine (RIT), leakage flow in impeller backface cavity has critical impacts on aerodynamic performance of the RIT and axial force acting on the RIT impeller. In order to control this leakage flow, different types of labyrinth seals are numerically studied in this paper based on a supercritical carbon dioxide (S-CO₂) RIT. The effects of seal clearance and cavity outlet pressure are first analyzed, and the impacts of seal design parameters, including height, number and shape of seal teeth, are evaluated. Results indicate that adding labyrinth seal can improve cavity pressure and hence More >

Yun Zhao, Shi Yan^*, Jiale Jia

CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.3, pp. 1251-1274, 2021, DOI:10.32604/cmes.2021.013478 - 19 February 2021

Abstract In this study, the pyramidal lattice stitched foam sandwich composite materials were manufactured by integrating top and bottom panels with pyramidal lattice core to overcome the weak interface between the core and the skins of the sandwich structure. The influence of the reinforcing core rods on the mechanical properties including compressive, shear, and three-point bending performances of the foam sandwich composite materials were revealed through theoretical analysis and comparative experiments. The theoretical predictions were consistent with the experimental results. Compressive test, shear test and three-point bending test were performed. The experimental results show that the… More >

Yong Xiao¹, Xin Jin¹, Jingfeng Yang², Yanhua Shen^3,*, Quansheng Guan⁴

CMES-Computer Modeling in Engineering & Sciences, Vol.126, No.3, pp. 1293-1313, 2021, DOI:10.32604/cmes.2021.012562 - 19 February 2021

Abstract User-transformer relations are significant to electric power marketing, power supply safety, and line loss calculations. To get accurate user-transformer relations, this paper proposes an identification method for user-transformer relations based on improved quantum particle swarm optimization (QPSO) and Fuzzy C-Means Clustering. The main idea is: as energy meters at different transformer areas exhibit different zero-crossing shift features, we classify the zero-crossing shift data from energy meters through Fuzzy C-Means Clustering and compare it with that at the transformer end to identify user-transformer relations. The proposed method contributes in three main ways. First, based on the… More >

Qiang Sun¹, Xuzhi Zhan^2,*

International Journal of Mental Health Promotion, Vol.23, No.1, pp. 75-86, 2021, DOI:10.32604/IJMHP.2021.014634 - 19 February 2021

Abstract Little is known on the association between movement behaviors including physical activity (PA), screen time (ST) and sleep (SLP) with depression in adolescents. This study aimed to explore the associations of PA, ST and SLP with depressive symptoms in adolescents. A total of 1,331 middle school students participated in this survey and provided valid data pertaining to the study variables. Self-reported questionnaires were used to collect information on participants’ sociodemographic parameters. The Health Behavior in School-aged Children Questionnaire was used to assess the PA (days for moderate to vigorous PA), ST (daily hours of ST)… More >

Tao Li¹, Fei Feng^2,*, Che Tong Nah³

International Journal of Mental Health Promotion, Vol.23, No.1, pp. 111-120, 2021, DOI:10.32604/IJMHP.2021.014433 - 19 February 2021

Abstract This study aimed to investigate the link between the exposure to intimate partner violence (IPV), core self-evaluations (CSE), and psychological adaptation of Chinese adolescents, through analysis of the results from the Survey of Children’s Exposure to Domestic Violence Scale, Core Self-Evaluations Scale, and Strengths and Difficulties Questionnaire, involving a total of 597 Chinese middle school students. It is indicated that the exposure to IPV is positively correlated with lower levels of psychological adaptation and CSE, and CSE is positively correlated with higher levels of psychological adaptation. Mediation analysis revealed that CSE partially mediated the association More >

Qin An¹, Jun Gao², Zhiqin Sang³, Mingyi Qian^4,*

International Journal of Mental Health Promotion, Vol.23, No.1, pp. 87-98, 2021, DOI:10.32604/IJMHP.2021.014422 - 19 February 2021

Abstract When COVID-19 pandemic hit China, Chinese clinical psychologists, counselors and other practitioners reacted quickly to provide psychological interventions for different target groups. Different professional ethical concerns and potential transgressions arose during different stages of pandemic. This paper aimed to summarize different ethical concerns and transgressions during different stages of pandemic in China, as well as how the professional ethical workgroup in the registration system of clinical psychologists and professional organizations of Chinese Psychological Society (CPS) to publish a series of documents as recommendations on ethical practice. It is hoped by providing a picture of “problems vs. More >

Jia Xu¹, Baoguo Xie^2,*, Yi Yang³, Linwei Li¹

International Journal of Mental Health Promotion, Vol.23, No.1, pp. 41-53, 2021, DOI:10.32604/IJMHP.2021.013518 - 19 February 2021

Abstract The recently recognized core construct of employee voice has been demonstrated to be related to various outcomes. However, to date, the impact of employee voice over time and on important employee well-being has been rarely tested. In the present research, we studied in particular how employee voice behavior is related to psychological well-being. Employing the theory of self-determination, we developed three hypotheses pertinent to this relationship, including the mediating role of authentic self-expression and the moderating role of collectivist orientation. We tested our hypotheses using data from 217 employees in Mainland China over two time More >

Guanghui Lei¹, Caihong Yang^2,#, Yan Ge^3,#, Yan Zhang^2,*, Yufei Xie^4,*, Jianwen Chen², Jinyang Wu⁵

International Journal of Mental Health Promotion, Vol.23, No.1, pp. 121-140, 2021, DOI:10.32604/IJMHP.2021.013072 - 19 February 2021

Abstract To explore the relationship between social support and sleep quality of community workers in Wuhan during the coronavirus disease 2019 (the COVID-19 infection epidemic), this research constructed a mediating effect model to explore the mediating psychological mechanism of social support influencing sleep quality of front-line community workers. A total of 500 front-line community workers in Wuhan were investigated. We used the perceived social support scale (PSSS), the Connor-Davidson Resilience Scale (CD-RISC), the perceived stress scale (PSS), and the Pittsburgh sleep quality index (PSQI) to measure social support, psychological resilience, perceived stress and sleep quality. Specifically,… More >

Song Ching Fan¹, Hui-Chuan Shih^2,*, Hui-Chu Tseng³, Kuei-Feng Chang⁴, Wei-Chin Li⁵, An Shin Shia⁶

International Journal of Mental Health Promotion, Vol.23, No.1, pp. 57-73, 2021, DOI:10.32604/IJMHP.2021.012177 - 19 February 2021

Abstract This paper talks about how to insist staying in changed mindset based on the assigned cognitive reframing principles, and finally the changed mindset become a forever psychological status by PSI model proposed by this study. P is the cognitive reframing principle of positive psychology, happiness in this case; S is self-efficacy, which plays the important role in maintaining the stress taker to psychologically stay in the changed mindset in the long run. I represent of insisting power, the mental toughness to against the adverse negative emotions. Improving university students’ stress coping skills through the psychological… More >

Khadija A. Al-Hassani¹, M. S. Alam², M. M. Rahman^1,*

FDMP-Fluid Dynamics & Materials Processing, Vol.17, No.1, pp. 1-20, 2021, DOI:10.32604/fdmp.2021.013497 - 09 February 2021

Abstract Nanofluids have enjoyed a widespread use in many technological applications due to their peculiar properties. Numerical simulations are presented about the unsteady behavior of mixed convection of Fe₃O₄-water, Fe₃O₄- kerosene, Fe₃O₄-ethylene glycol, and Fe₃O₄-engine oil nanofluids inside a lid-driven triangular cavity. In particular, a two-component non-homogeneous nanofluid model is used. The bottom wall of the enclosure is insulated, whereas the inclined wall is kept a constant (cold) temperature and various temperature laws are assumed for the vertical wall, namely: θ = 1(Case 1), θ = Y(1 – Y)(Case 2), and θ = sin(2πY)(Case 3). A tilted magnetic field of More >