Results 1 to 10 of about 2,750 (136)

Association of skin autofluorescence with low bone density/osteoporosis and osteoporotic fractures in type 2 diabetes mellitus 皮肤自发荧光与2型糖尿病患者低骨密度/骨质疏松及骨质疏松性骨折的关系

open access: yesJournal of Diabetes, Volume 14, Issue 9, Page 571-585, September 2022., 2022
Highlights The association between skin autofluorescence advanced glycation end products (SAF‐AGEage) and low bone density/osteoporosis or major osteoporotic fractures was noteworthy in patients with type 2 diabetes mellitus (T2DM). SAF‐AGEs were positively associated with the level of serum N‐terminal propeptide of type I procollagen (s‐PINP) and ...
Hongyan Liu   +5 more
wiley   +1 more source

Using Wikipedia to measure public interest in biodiversity and conservation

open access: yesConservation Biology, Volume 35, Issue 2, Page 412-423, April 2021., 2021
Abstract The recent growth of online big data offers opportunities for rapid and inexpensive measurement of public interest. Conservation culturomics is an emerging research area that uses online data to study human–nature relationships for conservation. Methods for conservation culturomics, though promising, are still being developed and refined.
John C. Mittermeier   +4 more
wiley   +1 more source

三维框架结构几何非线性分析综述

open access: yesJianzhu Gangjiegou Jinzhan, 2021
结构非线性分析是预测结构承载力或极限强度的有效方法。对三维框架结构的几何非线性、屈曲、后屈曲的研究进展进行综述,主要涵盖以下关键问题:(1)解析或半解析方法;(2)用于增量迭代非线性分析的公式;(3)三维框架在变形状态下的节点平衡;(4)非线性有限元的刚体测试;(5)增量分析中的迭代机制;(6)单元节点力的计算;(7)后屈曲响应的路径跟踪方案。考虑了解决包含多环曲线的结构后屈曲响应的理论和方法,实际上根据物理概念,可以大大简化用于几何非线性分析的增量迭代过程。即,如果在每个分析阶段都完全遵守刚体准则 ...
杨永斌, 陈安全, 何松, 王志鲁
doaj  

International clinical practice recommendations on the definition, diagnosis, assessment, intervention, and psychosocial aspects of developmental coordination disorder – Chinese (Mandarin) translation

open access: yesDevelopmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019
目的 本国际临床指南由欧洲残疾儿童学会(the European Academy of Childhood Disability,EACD)牵头制定,旨在解决发育性协调障碍(developmental coordination disorder,DCD)的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题,通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础,以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类,最终转化为指南建议。并由国际 ...
Jing Hua   +6 more
wiley   +1 more source

分层交叉密肋平钢板组合剪力墙滞回性能研究

open access: yesJianzhu Gangjiegou Jinzhan, 2022
在已有研究的基础上,进一步探究分层型梯形加劲肋对内嵌组合平钢板剪力墙滞回性能的影响。设计出分2层和3层的交叉密肋内嵌组合平钢板剪力墙,均为双层单跨试件。利用有限元软件ABAQUS对其进行非线性和线性荷载作用加载,与已有的不分层交叉密肋平钢板组合剪力墙进行对比分析。研究结果表明:结构的承载力随着梯形加劲肋分层数目的增加而逐渐降低,但是其延性却随之增加,对比分析3个试件有限元模拟的结果,结构的承载能力和延性性能并非随着梯形加劲肋分层数目的增多而呈现线性变化 ...
刘源, 杨瑞鹏, 谢亚欣, 郑宏
doaj  

Radiological findings in the proximal sesamoid bones of yearling and 2‐year‐old Thoroughbred sales horses: Prevalence, progression and associations with racing performance

open access: yesEquine Veterinary Journal, Volume 57, Issue 1, Page 87-100, January 2025.
Abstract Background Radiological findings in the proximal sesamoid bones (sesamoids) are a persistent source of controversy at Thoroughbred sales, due to inconsistent classification and conflicting assignment of potential clinical importance. Objectives To define the prevalence of sesamoid findings on sales repository radiographs in yearling and 2‐year‐
Frances J. Peat   +5 more
wiley   +1 more source

A new dawn? Population baselines of snow leopards and other mammals of the Kishtwar High Altitude National Park, India 新的曙光?印度基什特瓦尔高海拔国家公园雪豹和其他哺乳动物的种群基线

open access: yesIntegrative Conservation, Volume 3, Issue 3, Page 271-280, September 2024.
The Greater Himalayas in India, of which Kishtwar High Altitude National Park (KHANP) is a part, harbours potential snow leopard habitat. We sampled three catchments within the Dachhan region of KHANP using 44 cameras and identified four unique snow leopard individuals across 14 detections in nine camera locations.
Munib Khanyari   +8 more
wiley   +1 more source

一种新型高效的几何非线性梁-柱单元

open access: yesJianzhu Gangjiegou Jinzhan, 2018
进行杆系结构有限元分析时,为得到足够精确的数值解往往需要将构件划分为大量的单元。单元数量的增加不仅会极大的增加计算代价,还易产生数值计算不收敛的问题。在梁-柱单元位移函数中引入了轴力的影响,将传统三次位移函数改进为四次位移函数,并推导得到了新型几何非线性梁-柱单元。新单元几何非线性刚度矩阵中考虑了单元位形变化对平衡方程的影响及单元位形变化对几何方程的影响,进而可以考虑二阶效应、弓形效应。采用新单元编制了有限元程序,算例分析表明:该新梁-柱单元精度得到了显著改善,可以极大减少非线性有限元模型的单元数量 ...
王震, 李国强
doaj  

国外期刊论文简介

open access: yesJianzhu Gangjiegou Jinzhan, 2004
<正> Journal of Constructional Steel Research 两肢带斜撑加劲的槽钢设计 Young Ben(香港) 文章介绍了对两肢进行斜撑加劲的冷弯槽钢设计及数值模拟分析。槽钢横截面上的两肢翼缘支撑为不同角度的单支撑形式。数值模拟分析时采用有限元分析方法,文章提出了一个非线性有限元分析模型,并利用此模型与一个两端固支柱的试验结果进行了对比分析 ...
方明霁
doaj  

铝合金板式节点刚度对网壳稳定性能影响研究

open access: yesJianzhu Gangjiegou Jinzhan, 2018
铝合金板式节点网壳是一种典型的半刚性节点网壳。采用ANSYS有限元软件对铝合金板式节点网壳弹塑性稳定性能进行了有限元分析。建立了考虑节点刚度的杆件单元模型。采用Combin39单元对节点非线性弯曲刚度进行模拟。分析了节点刚度对网壳失稳模态、应力分布和极限承载力的影响。研究发现,节点的非线性弯曲刚度对网壳整体稳定性能具有削弱作用,其削弱作用随着网壳矢跨比的减小而加大。最后,为了了解节点刚度四折线模型中各参数对网壳稳定性能的影响而进行了参数分析。研究表明,网壳极限承载力随着滑移弯矩和嵌固刚度的减小而降低 ...
熊哲   +4 more
doaj  

Home - About - Disclaimer - Privacy