Reaction Mechanism Reduction for Ozone-Enhanced CH4/Air Combustion by a Combination of Directed Relation Graph with Error Propagation, Sensitivity Analysis and Quasi-Steady State Assumption

In this study, an 18-steps, 22-species reduced global mechanism for ozone-enhanced CH4/air combustion processes was derived by coupling GRI-Mech 3.0 and a sub-mechanism for ozone decomposition. Three methods, namely, direct relation graphics with error propagation, (DRGRP), sensitivity analysis (SA), and quasi-steady-state assumption (QSSA), were used to downsize the detailed mechanism to the global mechanism. The verification of the accuracy of the skeletal mechanism in predicting the laminar flame speeds and distribution of the critical components showed that that the major species and the laminar flame speeds are well predicted by the skeletal mechanism. However, the pollutant NO was predicated inaccurately due to the precursors for generating NO were removed as redundant components. The laminar flame speeds calculated by the global mechanism fit the experimental data well. The comparisons of simulated results between the detailed mechanism and global mechanism were investigated and showed that the global mechanism could accurately predict the major and intermediate species and significantly reduced the time cost by 72%Peer reviewe

Research Progress and Future Prospect of Dance Movement Therapy in China Based on a Citespace Visual Analysis

The purpose of this study was to (1) explore the research progress of dance movement therapy in China and (2) reveal future development trend of dance movement therapy. With the methods of literature review, logical induction and scientific knowledge mapping, the research results of dance movement therapy in China were analyzed visually. The co-occurrence chart of key words and timeline analysis chart of key words of dance movement therapy in China were created based on the data. The co-occurrence chart of key words showed that the research hotspots centered on dance therapy , psychotherapy , Parkinson\u27s disease , autism , special children , teenagers , college students and college students . The subjects of dance therapy were mainly special children, teenagers and college students. The diseases of dance therapy focused on Parkinson\u27s disease , schizophrenia , autism , social anxiety . Timeline analysis chart of key words showed that research subjects experienced trended from psychotherapy , autism to Parkinson\u27s disease and dance decompression . The patients in the study expanded from college students and autistic children to teenagers and college students . The auxiliary elements of dance therapy experienced the expansion from dance to music and art . On the basis of summarizing the experience gained from clinical practice, we should further clarify the operational definition and effect evaluation of dance therapy, and establish a complete and systematic dance analysis system. We should explore how to combine drug therapy with dance therapy, and study the best proportion of the two in the treatment. Under the background of the combination of medicine and sports, we should think about how to promote dance therapy, integrate dance therapy into disease prevention and treatment, and accelerate the advancement of the dance therapy industry

Analysis and Prospect of Research Progress of Health Education Curriculum in China

The purpose of this study was twofold: 1) review research results of health education in China and help readers gain a better understanding of the current profiles of research in health education curriculum and 2) provide a theoretical basis for future research in health education curriculum. Using key words such as health education curriculum on Chinese National Knowledge Infrastructure (CNKI), we searched and finally obtained 7287 articles. By using the visual analysis function of CNKI, we also analyzed the overall trend of research in Health Education Curriculum. Review of the articles found that the overall trend of research in health education curriculum in China has been growing since 1987, and has been growing at a steady rate since 2000. At present, the health education curriculum in China mainly consists of two forms: One is as part of physical education and health curriculum. The content generally focus on health knowledge, health habits, health concepts, and sports injury management and prevention in sports; The other form is a separate health education course. Its content generally includes mental health and health habits etc. At present, implementation of health education curriculum in China is mainly influenced by course time, teachers\u27 ability and evaluation mechanism. In the current research field of health education curriculum evaluation, there are more studies related to mental health curriculum evaluation, and the research in this area is mostly based on the construction of evaluation models, and more mature research results have been formed. However, the research on the evaluation of health education curriculum in physical education and health curriculum is relatively weak. Based on the progress of current research, future studies in health education curriculum should be carried out in the following aspects: 1) curriculum content: focusing on epidemic prevention and control theory and practice; 2) curriculum implementation: development of physical education teachers\u27 health knowledge literacy; and 3) curriculum evaluation: participation of multiple subjects

Progress and Review of the Research on School Physical Education Management in China

Reviewing and summarizing the research of school physical education management can promote school physical education work. The purpose of this study was twofold: (1) sorting out the achievements and shortcomings of the current research of school physical education management, and (2) putting forward prospects for the future research of school physical education management. In this review study, we followed three steps. We used the following keywords: “school physical education management”, OR “physical education management” for the literature search via the libraries resources of a large university in Shanghai, China. A total of 396 relevant articles were retrieved and then saved to a data processing computer. Then we collated and classified all the articles and then analyzed the management mode, management system and management method at the macro level, as well as the management of physical education teaching in schools, the management of physical education teachers, and the management of field equipment at the micro level. (1) Achievements: The research in the field of school physical education management gradually realized that it was difficult to adapt the experiential management to the new requirements of school physical education development, and began to explore management concept renewal. The research on the management model of school sports began to draw lessons from the management of school sports in developed countries and put forward innovative new models. The research on the management system of school physical education puts forward the existing problems and inadequacies based on the current management system. (2) Shortcomings: the research field of school physical education management is relatively narrow, and the research on primary and secondary education themes is scarce; Lack of empirical research; The current situation of management and countermeasures were mainly studied using questionnaire survey, and some studies ignored the basic knowledge of sports management in countermeasures analysis. Future research should take into account era background and the perspective of teaching integration; specifically, to strengthen the empirical research on the management of school physical education, broaden the school sports management research field of vision, the sports management expertise and school sports management research depth fusion, make school sports research has a broader coverage, deeper theoretical depth

Verification and Validation of a Low-Mach-Number Large-Eddy Simulation Code against Manufactured Solutions and Experimental Results

© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).To investigate turbulent reacting flows, a low-Mach number large-eddy simulation (LES) code called ‘LESsCoal’ has been developed in our group. This code employs the Germano dynamic sub-grid scale (SGS) model and the steady flamelet/progress variable approach (SFPVA) on a stagger-structured grid, in both time and space. The method of manufactured solutions (MMS) is used to investigate the convergence and the order of accuracy of the code when no model is used. Finally, a Sandia non-reacting propane jet and Sandia Flame D are simulated to inspect the performance of the code under experimental setups. The results show that MMS is a promising tool for code verification and that the low-Mach-number LES code can accurately predict the non-reacting and reacting turbulent flows. The validated LES code can be used in numerical investigations on the turbulent combustion characteristics of new fuel gases in the future.Peer reviewedFinal Published versio

Numerical simulation of dynamic response characteristics for launch and recovery system under random irregular wave

Based on the rain-flow counting method, a new random numerical simulation method for evaluating dynamic response characteristics of a launch and recovery system is presented in this study. It takes a random irregular wave as an input, and the random distribution characteristics of the dynamic responses of the launch and recovery system of a seafloor drill is analyzed by using the rain-flow counting method. The nonlinear coupling mechanisms among the movements of the ship, the umbilical cable, and the seafloor drill caused by random irregular wave are investigated. A dynamic model that considers the influence of the seawater resistance on the launch and recovery system of seafloor drill is established. Then, significant wave heights are used to produce excitation of the random irregular wave, and the corresponding dynamic random responses of the launch and recovery system are calculated and analyzed. At the same time, the movement of the seafloor drill and the tension of the umbilical cable are calculated and analyzed for the cases of seafloor drill at different water depths. This method provides a new tool for evaluating the dynamic response characteristics of launch and recovery system of other seafloor equipment under random irregular wave

Risk factors for community-acquired pneumonia among inpatients with mental disorders in a tertiary general hospital

IntroductionCommunity-acquired pneumonia (CAP) is an important cause of hospitalization and death in patients with mental disorders. It is critical to understand the risk factors of CAP and determine prevention strategies to reduce CAP. The aim of this study is to explore the characteristics of inpatients with mental disorders who have CAP and analyze the risk factors.MethodsThis retrospective study included 16,934 inpatients with mental disorders who were admitted for the first time to a tertiary general hospital between January 2017 and July 2021 (excluding January 2020–May 2020). Risk factors for CAP were identified by logistic regression analysis after propensity score matching (PSM, 1:4) for age, gender, and BMI.ResultsThe CAP rate of inpatients with mental disorders was 1.78%. Inpatients who had CAP had a significantly prolonged hospital stay, and were more often admitted to a closed ward or the ICU. After PSM, the multivariable analysis revealed that clozapine use (OR = 3.212, 95% CI = 1.744–5.915, P < 0.001), schizophrenia spectrum disorder (OR = 2.785, 95% CI = 1.684–4.607, P < 0.001), alcohol consumption (OR = 2.549, 95% CI = 1.586–4.096, P < 0.001), cardiovascular disease (OR = 2.299, 95% CI = 1.362–3.879, P = 0.002), Charlson comorbidity index (CCI) ≥ 3 (OR = 2.092, 95% CI = 1.342–3.260, P = 0.001), organic mental disorder (OR = 1.941, 95% CI = 1.194–3.156, P = 0.007), antipsychotic drug use (OR = 1.886, 95% CI = 1.312–2.711, P = 0.001), unmarried status (OR = 1.720, 95% CI = 1.164–2.541, P = 0.006) and junior high school education (OR = 1.591, 95%CI = 1.010–2.508, P = 0.045) were independent risk factors for CAP in inpatients with mental disorders.ConclusionCAP was common in inpatients with mental disorders. Patients with mental disorders have unique risk factors for CAP. Further research is required to explore the relationship and mechanism between different mental disorders, antipsychotic drugs and CAP

Characteristics of alkali species release from a burning coal/biomass blend

© 2018 Elsevier Ltd Solvent fractionation, Laser induced breakdown spectroscopy (LIBS), X-ray Diffraction (XRD) and chemical analysis were applied to binary fuel mixtures of Zhundong coal and cornstalk agricultural class to investigate the release characteristics of alkali species during co-firing of coal and biomass. As the biomass proportion increases, the water-soluble, NH 4 Ac-soluble and HCl-soluble alkali species interconvert; the extent of the conversion depends on the composition of the blend. From LIBS measurements, it was found that adding the biomass accelerates combustion and outgassing processes. The higher the proportion of the biomass in the blend, the earlier the peak concentrations of alkali appear, and the magnitude of peak concentrations of sodium and potassium decrease and increase, respectively. Furthermore, the interaction between coal and biomass can generate crystals causing the eutectic melting phenomenon (similar to feldspar in XRD results), which results in a sharp decline of the ash fusion temperatures (AFTs). The results not only provide the information of fundamental transformation but also guide industrial co-firing applications of lignite and agricultural class biomass to reduce the risk of ash deposition

Pattern of prefrontal cortical activation and network revealed by task-based and resting-state fNIRS in Parkinson’s disease’s patients with overactive bladder symptoms

BackgroundOveractive bladder (OAB) symptoms are common in Parkinson’s disease (PD), and negatively contribute to the quality of life (QoL) of patients. To explore the underlying pathophysiological mechanism, we investigated the correlation between the prefrontal cortex (PFC) function and OAB symptoms in PD patients.MethodsOne hundred fifty-five idiopathic PD patients were recruited and classified either as PD-OAB or PD-NOAB candidates based on their corresponding OAB symptom scores (OABSS). A linear regression analysis identified a correlative connection of cognitive domains. Then cortical activation during the performance of the verbal fluency test (VFT) and brain connectivity during resting state were conducted by functional near-infrared spectroscopy (fNIRS) for 10 patients in each group to investigate their frontal cortical activation and network pattern.ResultsIn cognitive function analysis, a higher OABS score was significantly correlated with a lower FAB score, MoCA total score, and sub-scores of visuospatial/executive, attention, and orientation as well. In the fNIRS study, the PD-OAB group exhibited significant activations in 5 channels over the left hemisphere, 4 over the right hemisphere, and 1 in the median during the VFT process. In contrast, only 1 channel over the right hemisphere showed significant activation in the PD-NOAB group. The PD-OAB group revealed hyperactivation, particularly in certain channel in the left dorsolateral prefrontal cortex (DLPFC), compared with PD-NOAB (FDR P < 0.05). In the resting state, there was a significant increase of the resting state functional connectivity (RSFC) strength between the bilateral Broca area, left frontopolar area (FPA-L) and right Broca’s area (Broca-R), between the FPA and Broca’s area if merging the bilateral regions of interest (ROI), and also between the two hemispheres in the PD-OAB group. The Spearman’s correlation confirmed that the OABS scores were positively correlated with RSFC strength between the bilateral Broca area, FPA-L and Broca-R, between the FPA and Broca area if merging the bilateral ROI.ConclusionIn this PD cohort, OAB was related to decreased PFC functions, with particularly hyperactivated left DLPFC during VTF and an enhanced neural connectivity between the two hemispheres in the resting state as observed by fNIRS imaging

In Situ Measurements of the Release Characteristics and Catalytic Effects of Different Chemical Forms of Sodium during Combustion of Zhundong Coal

This document is the Accepted Manuscript version of a Published Work that appeared in final form in Energy Fuels, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.energyfuels.8b00773.This work studies the temporal release characteristics of different chemical forms of sodium during the combustion of Zhundong coal and the catalytic effects of sodium on the combustion process via target-sodium removal and enrichment approaches. The target-sodium removal approach extracts specific forms of sodium from the raw coal via a chemical method to produce coal samples with designated characteristics. In the target-sodium enrichment approach, three kinds of H2O-soluble sodium compounds, including NaCl, NaOH and Na2SO4, are manually added into the raw coal. The experimental measurement is conducted using a multi-point Laser-Induced Breakdown Spectroscopy (LIBS) system. The system quantitatively measures the temporal release flux of sodium during the combustion process, and performs the in-situ measurement of surface temperature and diameter of a burning coal pellet. It is found that H2O-soluble sodium is the major chemical form of sodium released during the combustion and exhibits the highest volatility. All the three forms of enriched H2O-soluble sodium compounds show a catalytic effect on the coal combustion (burnout time decreased by more than 5.7%) and the catalytic activity of NaOH is found to be the strongest (burnout time decreased by 36.8%)