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Respiratory training interventions improve health status of heart failure patients: A systematic review and network meta-analysis of randomized controlled trials

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World Journal of Clinical Cases 2019年第18期7卷 2760-2775页

作者： mei-Hua Wang mei-Ling Yeh School of Nursing National Taipei University of Nursing and Health Sciences

BACKGROUND Prior studies indicate that doing breathing exercises improves physical performance and quality of life (QoL) in heart failure patients. However, these effects remain unclear and contradictory. AIM To determine the effects of machine-assisted and non-machine-assisted respiratory training on physical performance and QoL in heart failure patients. METHODS This was a systematic review and network meta-analysis study. A literature search of electronic databases was conducted for randomized controlled trials (RCTs) on heart failure. Respiratory training interventions were grouped as seven categories: IMT_Pn (inspiratory muscle training without pressure or < 10% maximal inspiratory pressure, MIP), IMT_Pl (inspiratory muscle training with low pressure, 10%-15% MIP), IMT_Pm (inspiratory muscle training with medium pressure, 30%-40% MIP), IMT_Ph (inspiratory muscle training with high pressure, 60% MIP or MIP plus aerobics), Aerobics (aerobic exercise or weight training), Qi_Ex (tai chi, yoga, and breathing exercise), and none. The four outcomes were heart rate, peak oxygen uptake (VO2 peak), 6-min walking distance test (6MWT), and Minnesota Living with Heart Failure QoL. The random-effects model, side-splitting model, and the surface under the cumulative ranking curve (SUCRA) were used to test and analyze the data. RESULTS A total of 1499 subjects from 31 RCT studies were included. IMT_Ph had the highest effect sizes for VO2 peak and 6MWT, IMT_Pm highest for QoL, and Qi_Ex highest for heart rate. Aerobics had the second highest for VO2 peak, Qi_Ex second highest for 6MWT, and IMT_Ph second highest for heart rate and *** This study supports that high- and medium-intensity machine-assisted training improves exercise capacity and QoL in hospital-based heart failure patients. After hospital discharge, non-machine-assisted training continuously improves cardiac function.

关键词： Heart failure Network meta-analysis Respiratory training Cardiac function Exercise capacity Quality of life

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High antibiotic resistance rate: A difficult issue for Helicobacter pylori eradication treatment

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World Journal of Gastroenterology 2015年第48期21卷 13432-13437页

作者： mei Zhang Department of Gastroenterology Xuanwu HospitalCapital Medical University

Helicobacter pylori(H. pylori) infection is associated with a variety of upper gastrointestinal diseases, including gastric cancer. With the wide application of antibiotics in H. pylori eradication treatment, drugresistant strains of H. pylori are increasing. H. pylori eradication treatment failure affects the outcome of a variety of diseases of the upper gastrointestinal tract. Therefore, antibiotic resistance that affects H. pylori eradication treatment is a challenging situation for clinicians. The ideal H. pylori eradication therapy should be safe, effective, simple, and economical. The eradication rate of triple antibiotic therapy is currently less than 80% in most parts of the world. Antibiotic resistance is the main reason for treatment failure, therefore the standard triple regimen is no longer suitable as a first-line treatment in most regions. H. pylori eradication treatment may fail for a number of reasons, including H. pylori strain factors, host factors, environmental factors, and inappropriate treatment.

关键词： Helicobacter pylori Resistance Eradicationtreatment Triple antibiotic therapy Gastrointestinaldisease

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Upper bounds for eigenvalues of Cauchy-Hankel tensors

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Frontiers of Mathematics in China 2021年第4期16卷 1023-1041页

作者： Wei mei Qingzhi YANG School of Mathematical Sciences and LPMC Nankai UniversityTianjin 300071China School of Mathematics and Statistics Kashi UniversityKashi 844006China

We present upper bounds of eigenvalues for finite and infinite dimensional Cauchy-Hankel *** is proved that an m-order infinite dimensional Canchy-Hankel tensor defines a bounded and positively(m-1)-homogeneous operat... 详细信息

关键词： Cauchy-Hankel tensor eigenvalues upper bound M-positive definite

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The spreading fronts in a mutualistic model with delay

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International Journal of Biomathematics 2016年第6期9卷 1-16页

作者： mei Li School of Applied Mathematics Nanjing University of Finance and Economics Nanjing 210023 P. R. China Institute of Mathematics Nanjing Normal University Nanjing 210023 P. R. China

This paper is concerned with a system of semilinear parabolic equations with two free boundaries describing the spreading fronts of the invasive species in a mutualistic eco- logical model. The local existence and uniqueness of a classical solution are obtained and the asymptotic behavior of the free boundary problem is studied. Our results indi- cate that two free boundaries tend monotonically to finite or infinite limits at the same time, and the free boundary problem admits a global slow solution with unbounded free boundaries if the intra-specific competitions are strong, while if the intra-specific competitions are weak, there exist the blowup solution and global fast solution.

关键词： Free boundary mutualistic model blowup global fast solution global slowsolution.

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A NOVEL METHOD FOR NONLINEAR IMPULSIVE DIFFERENTIAL EQUATIONS IN BROKEN REPRODUCING KERNEL SPACE

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Acta Mathematica Scientia 2020年第3期40卷 723-733页

作者： Liangcai mei Zhuhai Campus Beijing Institute of TechnologyZhuhai 519088China

In this article,a new algorithm is presented to solve the nonlinear impulsive differential *** the first time,this article combines the reproducing kernel method with the least squares method to solve the second-order nonlinear impulsive differential ***,the uniform convergence of the numerical solution is proved,and the time consuming Schmidt orthogonalization process is *** algorithm is employed successfully on some numerical examples.

关键词： Nonlinear impulsive differential equations Broken reproducing kernel space numerical algorithm

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Sedimentary Features and Implications for the Precambrian Non-stromatolitic Carbonate Succession:A Case Study of the Mesoproterozoic Gaoyuzhuang Formation at the Qiangou Section in Yanqing County of Beijing

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Acta Geologica Sinica(English Edition) 2008年第2期82卷 295-309页

作者： mei Mingxiang State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 School of Earth Sciences and Resources China University of Geosciences Beijing 100083

In the long Precambrian period, stromatolitic carbonate successions were very common. However, the non-stromatolitic carbonate succession that is marked by subtidal deposits shows a sharp contrast to the stromatolitic carbonate succession. Both the non-stromatolitic and the stromatolitic carbonate successions are important clues for the further understanding of the evolving carbonate world of the Precambrian. The Mesoproterozoic Gaoyuzhuang Formation at the Qiangou section in northwestern suburb of Beijing is a set of more than 1000 m-thick carbonate strata that can be divided into four members （or subformations）, in which a non-stromatolitic carbonate succession marked by the scarcity of stromatolites makes up the third member of the formation. This non-stromatolitic carbonate succession can further be subdivided into three third-order sequences that are marked by the regular succession of sedimentary facies. In third-order sequences, a lot of subtidal carbonate meter-scale cycles made up of medium-bedded leiolite limestones and thin-bedded marls constitute their transgressive system tracts （TSTs） and the early high-stand system tracts （EHSTs）, a lot of meter- scale cycles made up by thin-bedded limestones and marls constitute their condensed sections （CSs）, and thick-bedded to massive dolomitic limestones or lime dolomites make up the late high-stand system tracts （LHSTs）. The particularly non-stromatolitic carbonate succession making up the third member of the Mesoproterozoic Gaoyuzhuang Formation at the Qiangou section might be the representative of the non-stromatolitic carbonate succession of the Precambrian because of its special lithological features and particular sedimentary structures, and its general sedimentary features are helpful and meaningful for the further understanding of the evolution rules of the sophisticate and evolving carbonate world of the Precambrian. The time scale of the Gaoyuzhuang Formation is deduced as that from 1600 Ma to 1400 Ma;

关键词： non-stromatolitic carbonate succession Gaoyuzhuang Formation Mesoproterozoic,Qiangou section in Yanqing

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解淀粉芽孢杆菌wxy-b3产脂肽类物质对苹果斑点落叶病菌的抑菌活性研究

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陕西科技大学学报 2025年第1期43卷 46-51页

作者：崔皓玥田露胡乐梅龚国利陕西科技大学食品科学与工程学院陕西西安710021

苹果斑点落叶病菌是苹果生产过程中常见的病害,严重危害苹果农作物的产量.脂肽作为一种主要来源于微生物次生代谢产物的抗菌剂,具有广谱抑菌、低耐药性、安全低毒等优势.本研究发现,解淀粉芽孢杆菌wxy-b3产生的脂肽类物质能够抑制苹果... 详细信息

苹果斑点落叶病菌是苹果生产过程中常见的病害,严重危害苹果农作物的产量.脂肽作为一种主要来源于微生物次生代谢产物的抗菌剂,具有广谱抑菌、低耐药性、安全低毒等优势.本研究发现,解淀粉芽孢杆菌wxy-b3产生的脂肽类物质能够抑制苹果斑点落叶病菌的生长,对苹果斑点落叶病菌的最小抑菌浓度为16 mg/mL,此浓度可造成该病原菌细胞膜电位超极化、线粒体膜电位去极化、大分子蛋白质和核酸泄露,以及胞内活性氧和丙二醛含量分别累积增加0.33倍和5.44倍,并通过扫描电镜进一步观察到MIC处理组的细胞形态起皱、细胞膜破损.上述结果表明,脂肽可能通过破坏细胞膜系统,导致细胞形态发生变化,细胞膜破裂,改变细胞膜通透性来达到抑菌效果.该研究将为脂肽作为抑制苹果斑点落叶病菌的抗菌剂奠定理论基础.

关键词：解淀粉芽孢杆菌脂肽类物质苹果斑点落叶病菌抑菌活性

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Conservation Laws of Differential Equations in Finance

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Communications in Theoretical Physics 2005年第6X期44卷 967-968页

作者： QIN Mao-Chang mei Feng-Xiang SHANG mei School of Science Chongqing Technology and Business University Chongqing 400067 China School of Science Beijing Institute of Technology Beijing 100081 China

Conservation laws of some differential equations in fiance are studied in this paper. This method does not involve the use or existence of a variational principle. As an alternative, linearize the given equation and find adjoint equation of the linearized equation, the conservation laws can be constructed directly from the symmetries and adjoint symmetries of the associated linearized equation and its adjoint equation.

关键词： conservation law adjoint equation finance

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Evaluation of effective spectral features for glacial lake mapping by using Landsat-8 OLI imagery

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Journal of Mountain Science 2020年第11期17卷 2707-2723页

作者： ZHANG mei-mei ZHAO Hang CHEN Fang ZENG Jiang-yuan Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100094China State Key Laboratory of Remote Sensing Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100094China Hainan Key Laboratory of Earth Observation Aerospace Information Research InstituteChinese Academy of SciencesSanya 572029China

Glacial lake mapping provides the most feasible way for investigating the water resources and monitoring the flood outburst hazards in High Mountain ***,various types of glacial lakes with different properties bring a constraint to the rapid and accurate glacial lake mapping over a large *** spectral features to map glacial lakes are diverse but some are generally limited to the specific glaciated regions or lake types,some have unclear applicability,which hamper their application for the large *** this end,this study provides a solution for evaluating the most effective spectral features in glacial lake mapping using Landsat-8 *** 23 frequently-used lake mapping spectral features,including single band reflectance features,Water Index features and image transformation features were selected,then the insignificant features were filtered out based on scoring calculated from two classical feature selection methods-random forest and decision tree *** result shows that the three most prominent spectral features(SF)with high scores are NDWI1,EWI,and NDWI3(renamed as SF8,SF19 and SF12 respectively).Accuracy assessment of glacial lake mapping results in five different test sites demonstrate that the selected features performed well and robustly in classifying different types of glacial lakes without any influence from the mountain ***8 and SF19 are superior for the detection of large amount of small glacial lakes,while some lake areas extracted by SF12 are ***,SF8 achieved better accuracy than the other two features in terms of both Kappa Coefficient(0.8812)and Prediction(0.9025),which further indicates that SF8 has great potential for large scale glacial lake mapping in high mountainous area.

关键词： Glacial lake mapping Landsat-8 OLI Water Index Spectral features

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Potential effects of the nursing work environment on the work-family conflict in operating room nurses

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World Journal of Clinical Cases 2021年第26期9卷 7738-7749页

作者： Chun-mei Fu Jie Ou Xiao-mei Chen mei-Ye Wang Department of Ophthalmology Hainan West Central HospitalDanzhou 571700Hainan ProvinceChina Department of Critical Care Medicine Hainan General HospitalHaikou 570311Hainan ProvinceChina Operation Room The Second Affiliated Hospital of Hainan Medical CollegeHaikou 570311Hainan ProvinceChina Department of General Practice Hainan West Central HospitalDanzhou 571700Hainan ProvinceChina

BACKGROUND The nursing working environment is an important subsystem in the hospital environment.A good working environment could have a positive impact on ***,the work-family conflict and unsatisfactory working environment could significantly reduce their working enthusiasm,efficacy as well as the overall quality of the nursing,increase their fatigue,and thereby compromise their career *** To explore the possible status quo and to analyze the correlation between work environment perception and the work-family conflict among nurses in the operating *** A total of 312 operating room nurses from two first-class hospitals at Grade 2 and two first-class hospitals at Grade 3 in China from May to September 2017 were included in this research using the cluster sampling *** data,including the general information questionnaire,the practice environment scale of the nursing work index(PES-NWI),and the work-family conflict scale,were systematically *** correlation analysis was applied to analyze the correlation between the two scores,with influencing factors analyzed by hierarchical regression *** A total of 312 questionnaires were issued,and the response rate and effective questionnaire rate were both 96.15%(300/312).The total scores of the PES-NWI scale and the work-family conflict scale were 3.07±0.43(vs maximum up to 4 points)and 52.32±8.79(vs maximum up to 90 points),*** scores of the PES-NWI scale were negatively correlated with that of work-family conflict scale(all P<0.05).The perception of the nursing work environment and the number of night shifts per month were the major factors contributing to the workfamily conflict(all P<0.05).CONCLUSION The nursing work environment and the work-family conflict among nurses in the operating room were both found at a medium level with a negative correlation between the two.

关键词： Operating room nurses Perception of nursing work environment Workfamily conflict Correlation Influencing factors

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