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预应力加筋体水平土压力及作用机理研究

湖南大学学报（自然科学版） 2019年第9期46卷 100-107页

作者：杜运兴袁兰周芬湖南大学土木工程学院

采用缩尺模型试验及三维有限元模拟研究了预应力筋长度对加筋体水平土压力分布的影响及加筋体中预应力筋的预拉力作用机理.研究表明:墙背土压力的大小与分布规律与预应力筋长度无关;预拉力作用下,预应力筋位置填料的水平土压力沿筋长方... 详细信息

采用缩尺模型试验及三维有限元模拟研究了预应力筋长度对加筋体水平土压力分布的影响及加筋体中预应力筋的预拉力作用机理.研究表明:墙背土压力的大小与分布规律与预应力筋长度无关;预拉力作用下,预应力筋位置填料的水平土压力沿筋长方向呈两端大中间小的分布规律,其中部填料的水平土压力值增幅随预应力筋长度的增大而减小;随着预拉力的增加,填料水平应力值会超过竖向应力值并与大主应力值完全重合;填料的平均破坏比系数呈先减小后增大的变化趋势,填料的应力水平表明在预拉力作用下填料存在最优的应力状态.

关键词：加筋土挡墙预拉力土压力机理分析模型试验有限元分析

APFA:Ameliorated Pathfinder Algorithm for Engineering Applications

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Journal of Bionic Engineering 2024年第3期21卷 1592-1616页

作者： Keyu Zhong fen Xiao Xieping Gao Key Laboratory of Computing and Stochastic Mathematics of Ministry of Education Hunan Normal UniversityChangsha410081China School of Mathematics and Statistics Hunan Normal UniversityChangsha410081China School of Computer Science Xiangtan UniversityXiangtan411105China Hunan Provincial Key Laboratory of Intelligent Computing and Language Information Processing Hunan Normal UniversityChangsha410081China

Pathfinder algorithm(PFA)is a swarm intelligent optimization algorithm inspired by the collective activity behavior of swarm animals,imitating the leader in the population to guide followers in finding the best food *** algorithm has the characteristics of a simple structure and high ***,PFA faces challenges such as insufficient population diversity and susceptibility to local optima due to its inability to effectively balance the exploration and exploitation *** paper proposes an Ameliorated Pathfinder Algorithm called APFA to solve complex engineering optimization ***,a guidance mechanism based on multiple elite individuals is presented to enhance the global search capability of the ***,to improve the exploration efficiency of the algorithm,the Logistic chaos mapping is introduced to help the algorithm find more high-quality potential solutions while avoiding the worst ***,a comprehensive following strategy is designed to avoid the algorithm falling into local optima and further improve the convergence *** three strategies achieve an effective balance between exploration and exploitation overall,thus improving the optimization performance of the *** performance evaluation,APFA is validated by the CEC2022 benchmark test set and five engineering optimization problems,and compared with the state-of-the-art metaheuristic *** numerical experimental results demonstrated the superiority of APFA.

关键词： Pathfinder algorithm Swarm intelligent Metaheuristic Engineering problems

An Efficient Multi-objective Approach Based on Golden Jackal Search for Dynamic Economic Emission Dispatch

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Journal of Bionic Engineering 2024年第3期21卷 1541-1566页

Dynamic Economic Emission Dispatch(DEED)aims to optimize control over fuel cost and pollution emission,two conflicting objectives,by scheduling the output power of various units at specific *** many methods well-performed on the DEED problem,most of them fail to achieve expected results in practice due to a lack of effective trade-off mechanisms between the convergence and diversity of non-dominated optimal dispatching *** address this issue,a new multi-objective solver called Multi-Objective Golden Jackal Optimization(MOGJO)algorithm is proposed to cope with the DEED *** proposed algorithm first stores non-dominated optimal solutions found so far into an ***,it chooses the best dispatching solution from the archive as the leader through a selection mechanism designed based on elite selection strategy and Euclidean distance index *** mechanism can guide the algorithm to search for better dispatching solutions in the direction of reducing fuel costs and pollutant ***,the basic golden jackal optimization algorithm has the drawback of insufficient search,which hinders its ability to effectively discover more Pareto *** this end,a non-linear control parameter based on the cosine function is introduced to enhance global exploration of the dispatching space,thus improving the efficiency of finding the optimal dispatching *** proposed MOGJO is evaluated on the latest CEC benchmark test functions,and its superiority over the state-of-the-art multi-objective optimizers is highlighted by performance ***,empirical results on 5-unit,10-unit,IEEE 30-bus,and 30-unit systems show that the MOGJO can provide competitive compromise scheduling solutions compared to published DEED ***,in the analysis of the Pareto dominance relationship and the Euclidean distance index,the optimal dispatching solutions provided by MOGJO are the closest to the ideal solutions for minimizing fuel costs

关键词： Dynamic economic emission dispatch Multi-objective optimization Golden jackal Euclidean distance index

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单根无黏结预应力筋对加筋体力学性能的影响

岩土力学 2018年第7期39卷 2442-2450页

作者：周芬梁强杜运兴湖南大学土木工程学院湖南长沙410082

采用缩尺模型试验研究了无黏结预应力加筋土技术中水平土压力的大小及分布对预应力加筋体力学性能的影响。试验采用钢砂模拟中砂,解决了缩尺模型相似比的问题。完成了两个工况的试验,一个普通加筋土工况,一个具有单根无黏结预应力筋的... 详细信息

采用缩尺模型试验研究了无黏结预应力加筋土技术中水平土压力的大小及分布对预应力加筋体力学性能的影响。试验采用钢砂模拟中砂,解决了缩尺模型相似比的问题。完成了两个工况的试验,一个普通加筋土工况,一个具有单根无黏结预应力筋的工况。对比分析表明:对无黏结预应力筋施加预拉力前加筋体的顶部沉降小于普通加筋体的顶部沉降,施加预拉力后却增加了顶部沉降,但在堆载后具有单根无黏结预应力筋的加筋体的竖向变形更小;随着预拉力的增加,与无黏结预应力筋相邻的玻纤格栅应变相应减小,在距离墙面板较近位置测点玻纤格栅的应变减小得尤为明显,而底部玻纤格栅应变逐渐增加,在距离墙面板较近位置测点增加得较为明显;在堆载过程中,无黏结预应力筋的预拉力保持不变,堆载完成后略有增加。

关键词：预应力加筋材料加筋体力学性能模型试验

Gingipain from Porphyromonas gingivalis causes insulin resistance by degrading insulin receptors through direct proteolytic effects

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International Journal of Oral Science 2024年第3期16卷 539-552页

作者： fen Liu Bofeng Zhu Ying An Zhifei zhou Peiying Xiong Xuan Li Yang Mi Tongqiang He Faming Chen Buling Wu Shenzhen Stomatology Hospital(Pingshan) Southern Medical UniversityShenzhenChina Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research Laboratory Center of StomatologyDepartment of Paediatric DentistryCollege of StomatologyXi’an Jiaotong UniversityXi’anChina State Key Laboratory of Oral&Maxillofacial Reconstruction and Regeneration National Clinical Research Center for Oral DiseasesShaanxi International Joint Research Center for Oral DiseasesDepartment of PeriodontologySchool of StomatologyThe Fourth Military Medical UniversityXi’anChina Guangzhou Key Laboratory of Forensic Multi-Omics for Precision Identification School of Forensic MedicineSouthern Medical UniversityGuangzhouChina Microbiome Medicine Center Department of Laboratory MedicineZhujiang HospitalSouthern Medical UniversityGuangzhouChina Department of Stomatology General Hospital of Tibetan Military CommandLhasaChina Department of Stomatology Center Shenzhen HospitalSouthern Medical UniversityShenzhenChina Department of Obstetrics Northwest Women’s and Children’s HospitalXi’anChina

Periodontitis is a critical risk factor for the occurrence and development of *** gingivalis may participate in insulin resistance(IR)caused by periodontal inflammation,but the functional role and specific mechanisms of *** in IR remain *** the present study,clinical samples were analysed to determine the statistical correlation between *** and IR *** culturing of hepatocytes,myocytes,and adipocytes,and feeding mice *** orally,the functional correlation between *** and IR occurrence was further studied both in vitro and in *** data suggested that the amount of *** isolated was correlated with the Homeostatic Model Assessment for IR *** vitro studies suggested that coculture with *** decreased glucose uptake and insulin receptor(INSR)protein expression in hepatocytes,myocytes,and *** fed *** tended to undergo *** was detectable in the liver,skeletal muscle,and adipose tissue of experimental *** distribution sites of gingipain coincided with the downregulation of *** proteolysed the functional insulin-binding region of *** with *** significantly decreased the INSR–insulin binding *** out gingipain from *** alleviated the negative effects of *** on IR in *** together,these findings indicate that distantly migrated *** may directly proteolytically degrade INSR through gingipain,thereby leading to *** results provide a new strategy for preventing diabetes by targeting periodontal pathogens and provide new ideas for exploring novel mechanisms by which periodontal inflammation affects the systemic metabolic state.

关键词： gingivalis inflammation resistance

药物联合综合康复在卒中后肌张力增高患者中的应用效果分析

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中国基层医药 2021年第3期28卷 448-450页

作者：周芬绍兴市第七人民医院综合科浙江省312000

目的探讨药物联合综合康复在卒中后肌张力增高患者中的应用效果。方法选取绍兴市第七人民医院2017年6月至2019年9月收治的卒中后肌张力增高患者96例为研究对象,采用随机数字表法分为观察组(48例)和对照组(48例)。对照组行常规康复治疗,... 详细信息

目的探讨药物联合综合康复在卒中后肌张力增高患者中的应用效果。方法选取绍兴市第七人民医院2017年6月至2019年9月收治的卒中后肌张力增高患者96例为研究对象,采用随机数字表法分为观察组(48例)和对照组(48例)。对照组行常规康复治疗,观察组行药物联合以物理疗法为主的综合康复治疗,比较两组临床效果、临床症状改善情况、肌张力、运动评分。结果观察组上下肢肌张力总有效率为93.75%(45/48),对照组为70.83%(34/48),观察组显著高于对照组(χ^(2)=8.649,P=0.003)。观察组上、下肢痉挛改善优良率分别为89.58%(43/48)、93.75%(45/48),均明显高于对照组(χ^(2)=14.892、12.379,均P<0.05)。观察组上、下肢肌张力评分分别为(1.1±0.4)分、(0.8±0.3)分,均明显低于对照组的(0.6±0.3)分、(0.5±0.1)分(t=6.928、6.573,均P<0.001)。观察组运动评分为(68.54±26.17)分,明显高于对照组的(47.68±19.33)分(t=4.442,P<0.001)。结论药物联合综合康复在卒中后肌张力增高患者治疗中具有显著的疗效,值得推广和应用。

关键词：卒中肌张力失调张力障碍痉挛药物疗法物理疗法康复治疗结果

Bibliometrics and visual analysis for clinical research on intervention of traditional Chinese medicine nursing technology on rheumatoid arthritis

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Journal of Integrative Nursing 2022年第1期4卷 20-25页

作者： Ling TANG Jianni QU Hong GUO Mei WANG Nini XU Xiaoyan BAI Xueyan FAN Zhixuan XU Yihui TIAN fen zhou Department of Nursing Dongfang Hospital of Beijing University of Chinese MedicineBeijingChina School of Nursing Beijing University of Chinese MedicineBeijingChina School of Nursing and Rehabilitation Shandong UniversityShandongChina#contributed equally to this work.

Objective:The objective of this study is to explore the current situation,clinical research hot spots,and trends of traditional Chinese medicine(TCM)nursing technology in rheumatoid arthritis(RA),to draw a panorama of clinical research,to provide the basis and clues for subsequent high-level evidence integration and further in-depth *** and Methods:Seven databases including China National Knowledge Infrastructure,Chinese Scientific Journal Database(VIP),Wanfang Database,Chinese Biomedical Literature Database(Sino-Med),PubMed,Embase,and the Cochrane Library were *** bibliometric method and visualization software CiteSpace were used to conduct a multi-dimensional analysis of the included ***:A total of 805 pieces of literature were included(of them,one was written in German and four in English),and the number of published literature showed an increasing trend year by *** were only 30(3.73%)pieces of literature published in nursing *** hot spots of the co-occurrence map were concentrated in:(1)the nursing of fumigation in RA;(2)the efficacy evaluation of TCM nursing technology on pain,joint malformation,and joint dysfunction caused by *** included literature themes focused on five TCM technologies:fumigation,moxibustion,acupoint patching,acupoint injection,and Chinese herbal *** beginning year and strength in TCM fumigation were 2012 and 5.2,and those in moxibustion were 2011 and ***:The related studies are on the *** has entered the field of international readers with clear research hot ***,there are still shortcomings such as little literature published in Chinese nursing core journals,few non-Chinese-related documents,and a lack of international exchanges and *** current research hot spots in this field are TCM fumigation,and the cutting-edge trend of future research may be fumigation and moxibustion *** is suggested that further research can focus on ev

关键词： Literature metrology rheumatoid arthritis traditional Chinese medicine nursing technology visual analysis Wangbi

不均匀胶层对CFRP板加固梁的界面应力影响

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湖南大学学报（自然科学版） 2017年第3期44卷 61-67页

作者：杜运兴侯春旭周芬湖南大学土木工程学院湖南长沙410082

采用数值试验研究了CFRP板加固钢筋混凝土梁中不均匀胶层的应力及加固界面应力.被加固梁界面上设置缺口改变胶层的局部厚度,根据缺口的深度、宽度、位置建立6种分析工况.研究表明,缺口距离CFRP板端部较近时,界面峰值应力会高于无缺口工... 详细信息

采用数值试验研究了CFRP板加固钢筋混凝土梁中不均匀胶层的应力及加固界面应力.被加固梁界面上设置缺口改变胶层的局部厚度,根据缺口的深度、宽度、位置建立6种分析工况.研究表明,缺口距离CFRP板端部较近时,界面峰值应力会高于无缺口工况,缺口远离CFRP板端部位置时,峰值界面应力几乎不受影响;缺口距离CFRP板端部为CFRP板长的0.83%和1.25%时,峰值界面剪应力和正应力分别达到最大值;当缺口的长度或深度增大时,峰值界面剪应力和界面正应力均增大,界面应力对于缺口深度更敏感;在远离CFRP板端部区域,胶层中的应力沿其厚度方向均匀分布;当缺口出现在CFRP板端部附近时,CFRP板端部胶层中的应力沿厚度方向变化更大且应力在缺口区域内分布更加不均匀.

关键词： CFRP 缺口有限元分析界面应力应力分布

基于公司治理的中小企业会计信息质量改进研究

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财务与金融 2010年第6期 41-44页

作者：周芬长沙理工大学经济与管理学院

论文首先简单介绍了公司治理理论的内容,然后分析了公司治理与会计信息质量之间的显著相关性,讨论了我国现阶段中小企业公司治理存在的问题及对会计信息质量的影响,最后从内、外部治理机制两方面分别提出了提高中小企业会计信息质量的对... 详细信息

论文首先简单介绍了公司治理理论的内容,然后分析了公司治理与会计信息质量之间的显著相关性,讨论了我国现阶段中小企业公司治理存在的问题及对会计信息质量的影响,最后从内、外部治理机制两方面分别提出了提高中小企业会计信息质量的对策,认为企业内部需要建立有效履行各个职能的运行机制,同时还需要政府、银行、社会中介和媒体等对外部治理发挥作用。

关键词：公司治理中小企业会计信息质量