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冷弯等边角钢梁双向受弯屈曲分析

建材世界 2017年第3期38卷 61-64,77页

作者：陈杭万红霞吴笛武汉理工大学土木工程与建筑学院武汉430070

冷弯等边角钢梁由于其截面的特殊性,外荷载作用方向易与形心主轴倾斜而产生双向弯曲。考虑荷载经过截面剪心情况下冷弯等边角钢梁的双向受弯作用,利用ANSYS有限元软件,对双向弯曲作用下冷弯等边角钢梁进行屈曲失稳分析。首先,在集中和... 详细信息

冷弯等边角钢梁由于其截面的特殊性,外荷载作用方向易与形心主轴倾斜而产生双向弯曲。考虑荷载经过截面剪心情况下冷弯等边角钢梁的双向受弯作用,利用ANSYS有限元软件,对双向弯曲作用下冷弯等边角钢梁进行屈曲失稳分析。首先,在集中和均布荷载作用下,得到四组不同宽厚比的角钢梁在三组跨度下的屈曲模态与屈曲荷载并进行结果分析;然后改变外荷载与主轴的夹角,找到不同角度下冷弯等边角钢梁的屈曲模态与屈曲荷载的变化规律。结果表明,宽厚比、跨度的变化与荷载角度的改变对冷弯等边角钢有不同的作用,并且不同角度的荷载产生的双向弯曲作用会影响冷弯等边角钢梁的屈曲模态。

关键词：冷弯等边角钢梁双向弯曲有限元分析屈曲模态

Constitutive model of disturbed soil-structure interface within mining subsidence areas

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Journal of Central South University 2017年第7期24卷 1676-1683页

作者： CHANG hong xia Jun-wu Mechanics and Civil Engineering China University of Mining&TechnologyXuzhou 221116China Key Laboratory of Deep Coal Resources Mining of Ministry of Education(China University of Mining&Technology) Xuzhou 221116China

The characteristics of a disturbed soil-structure interface were studied based on the variation regularities of the disturbed soil within its mining subsidence area using direct shear *** effects of the initial moisture content on the shear strength parameters of the soil-structure interfaces were *** results indicate that the cohesion of the interface initially increased and then decreased as the initial moisture content *** addition,the friction angle of the interface decreased as the initial moisture content increased.A constitutive model of the disturbed soil-structure interface,a rigid-plastic model based on the initial void ratio and saturability(VSRP) model,was established based on the *** order to validate this model,a finite element analysis of DRS-1 direct shear tests was *** finite element model calculations coincided with the results of the DRS-1 direct shear *** proposed model also reflected the nonlinear features of the soil-structure interface.

关键词： mining subsidence areas soil-structure interface rigid-plastic model finite element method

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索和膜结构的力密度法找形分析

武汉理工大学学报 2004年第4期26卷 77-79页

作者：万红霞吴代华武汉理工大学理学院武汉430070

阐述了力密度法的基本原理 ,利用自编程序 ,对一双曲抛物面索网和一帐篷形膜结构进行了找形分析 ,重点讨论了索单元的力密度和膜单元的应力密度的取值对找形分析结果的影响。

关键词：索网膜结构力密度法找形

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从中医中伤的致因探讨运动损伤的预防

宜春学院学报 2022年第9期44卷 95-97,108页

作者：程昭夏宏武汪宗保李俊杰安徽中医药大学体育健康学院安徽合肥230012

中医伤的致因多种,主要分为外因、内因、不内外因三个方面,从中医伤的致因中探索运动损伤影响因素,运动中避免六淫外侵、七情内困、不内外因所害,做到宽以待人,合理适度,防微杜渐等,减少运动损伤的发生、发展与恶化,维护运动安全。

关键词：中医伤运动损伤预防

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太极拳运动对中老年人心血管系统的影响

安徽工业大学学报（社会科学版） 2010年第5期27卷 159-160页

作者：唐传勤黄世钧夏宏武安徽中医学院体育部安徽合肥230038

太极拳作为一种良好的保健运动,对人的心脏功能、血压、肺功能、血液循环等产生积极影响,能改善机体心血管系统功能状况,增强心肺功能,增加血管弹性,改进人体的自身调节功能。

关键词：心血管系统太极拳运动影响

miRNA-21-5p is an important contributor to the promotion of injured peripheral nerve regeneration using hypoxia-pretreated bone marrow-derived neural crest cells

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Neural Regeneration Research 2025年第1期20卷 277-290页

作者： Meng Cong Jing-Jing Hu Yan Yu xiao-Li Li xiao-Ting Sun Li-Ting Wang xia wu Ling-Jie Zhu xiao-Jia Yang Qian-Ru He Fei Ding Hai-Yan Shi School of Medicine Nantong UniversityNantongJiangsu ProvinceChina Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education and Coinnovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina Department of Physiology Jiangsu Health Vocational CollegeNanjingJiangsu ProvinceChina Department of Pathology Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Jiangsu Clinical Medicine Center of Tissue Engineering and Nerve Injury Repair Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina

Our previous study found that rat bone marrow–derived neural crest cells(acting as Schwann cell progenitors)have the potential to promote long-distance nerve ***-based therapy can enhance peripheral nerve repair and regeneration through paracrine bioactive factors and intercellular ***,the complex contributions of various types of soluble cytokines and extracellular vesicle cargos to the secretome remain *** investigate the role of the secretome and extracellular vesicles in repairing damaged peripheral nerves,we collected conditioned culture medium from hypoxia-pretreated neural crest cells,and found that it significantly promoted the repair of sensory neurons damaged by oxygen-glucose *** mRNA expression of trophic factors was highly expressed in hypoxia-pretreated neural crest *** performed RNA sequencing and bioinformatics analysis and found that miR-21-5p was enriched in hypoxia-pretreated extracellular vesicles of neural crest ***,to further clarify the role of hypoxia-pretreated neural crest cell extracellular vesicles rich in miR-21-5p in axonal growth and regeneration of sensory neurons,we used a microfluidic axonal dissociation model of sensory neurons in vitro,and found that hypoxia-pretreated neural crest cell extracellular vesicles promoted axonal growth and regeneration of sensory neurons,which was greatly dependent on loaded ***,we constructed a miR-21-5p-loaded neural conduit to repair the sciatic nerve defect in rats and found that the motor and sensory functions of injured rat hind limb,as well as muscle tissue morphology of the hind limbs,were obviously *** findings suggest that hypoxia-pretreated neural crest extracellular vesicles are natural nanoparticles rich in ***-21-5p is one of the main contributors to promoting nerve regeneration by the neural crest cell *** helps to explain the mechanism of action of the secretome and e

关键词： axotomy cell-free therapy conditioned medium extracellular vesicles hypoxic preconditioning microRNA oxygen-glucose deprivation peripheral nerve injury Schwann cell precursors

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基于SUMT法的圆柱齿轮优化设计

石河子大学学报（自然科学版） 2001年第4期5卷 325-326页

作者：张宏文郑霞吴杰石河子大学机械电器工程学院石河子832003

通过SUMT法构造惩罚函数 ,使有约束的极小化问题转化为无约束的极小化问题 ,寻求目标函数最优值。

关键词：圆柱齿轮 SUMT法惩罚函数优化设计目标函数无约束极小化问题

Two Structure-Preserving-Doubling Like Algorithms to Solve the Positive Definite Solution of the Equation X-A^(H)X^(-1)A=Q

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Communications on Applied Mathematics and Computation 2021年第1期3卷 123-135页

作者： xiao-xia Guo hong-xiao wu School of Mathematical Science Ocean University of ChinaQingdao 266100Shandong ProvinceChina

In this paper,we study the nonlinear matrix equation X-A^(H)X^(-1)A=Q,where A,Q∈C^(n×n),Q is a Hermitian positive definite matrix and X∈C^(n×n)is an unknown *** prove that the equation always has a unique Hermitian positive definite *** present two structure-preserving-doubling like algorithms to find the Hermitian positive definite solution of the equation,and the convergence theories are ***,we show the effectiveness of the algorithms by numerical experiments.

关键词： Positive definite solution Structure-preserving-doubling like algorithm Convergence Numerical experiment

ICP-AES法同时测定不锈钢中多元素研究

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科技创新与生产力 2011年第9期 91-92,95页

作者：滕红霞董平武云琳晋西集团理化计量中心山西太原030027

利用全谱直读ICP-AES(CID检测器)分析技术,对试样溶解方法、元素分析谱线和背景校正扣除、仪器分析参数等因素进行试验研究,结果表明,此方法能同时测定不锈钢中多元素。

关键词： ICP-AES 同时测定不锈钢多元素