Results 11 to 20 of about 3,757 (114)
Fractal characteristics of fiber lithium slag concrete cracks under sulfate attack [PDF]
, 2022 Natural corrosion of concrete structure due to sulfate poses a serious threat to people's lives and property. Therefore, it is of great practical significance to study the phenomenon of sulfate corrosion on concrete.
Guang-tai ZHANG +3 more
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Journal of Traumatic Stress, Volume 36, Issue 1, Page 5-16, February 2023., 2023 Abstract Ensuring effective mental health and psychosocial support is crucial following exposure to a potentially traumatic event and can have long‐term consequences for individuals, families, and communities. Psychological first aid (PFA) has become a widespread intervention of choice following exposure to conflict or disaster; however, its impact is ...
Sabrina Hermosilla +5 more
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Journal of Traumatic Stress, Volume 35, Issue 4, Page 1263-1272, August 2022., 2022 Abstract Trauma exposure and posttraumatic stress symptoms (PTSS) are associated with biases in emotional face processing. Existing research has utilized a variety of methodological techniques to demonstrate hyperreactivity to threatening cues in posttraumatic stress disorder (PTSD; i.e., fearful faces), but studies to date have shown conflicting ...
Lauren A. Rutter +4 more
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Journal of Traumatic Stress, Volume 33, Issue 5, Page 720-730, October 2020., 2020 Abstract Ehlers and Clark's (2000) cognitive model of posttraumatic stress disorder (PTSD) highlights the importance of negative appraisals in maintaining posttraumatic stress. Recent research suggests that alienation appraisals, defined as feeling disconnected from the self and others, mediate the association between traumatic experiences and ...
Rachel McIlveen +5 more
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Developmental 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
Jianzhu Gangjiegou Jinzhan, 2023 以螺栓群偏心距和端板厚度为研究参数，对梁柱节点中端板连接在偏心拉力作用下（A组）和纯弯矩作用下（B组）的螺栓群进行了受拉性能试验研究。通过对破坏模式、螺栓群受力分布和中和轴偏移率的分析，研究了端板连接普通螺栓群中和轴位置变化的情况；对两组试验开展有限元分析，从荷载-位移曲线和节点抗拉性能两方面进行研究。结果表明：随着荷载逐渐增大，螺栓群中和轴不断向受压区移动；增大螺栓群偏心距可使螺栓力增大，且加快中和轴向受压区偏移；增加端板厚度能够减小螺栓力，并延缓中和轴向受压区偏移 ...
王安涟 +5 more
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Gaoya dianqi, 2023 为准确掌握直流偏磁下电力变压器铁心的振动特性，文中通过建立变压器电磁—结构多物理场耦合有限元分析模型，计算了变压器直流偏磁前后铁心磁通密度分布和励磁电流，分析了麦克斯韦力和磁致伸缩力作用下不同直流偏磁时的铁心振动特征，定义了S变换相对能谱熵来描述变压器铁心振动随直流偏磁程度的变化规律。对某500 kV三相五柱式自耦变压器的仿真计算结果表明，随着直流电流增加，变压器铁心振动幅值增大，振动频谱分量增多，但随后呈现饱和趋势，且铁心心柱和旁柱振动信号的S变换相对能谱熵变化各异 ...
宋奇珂, 王丰华
doaj
Jianzhu Gangjiegou Jinzhan, 2023 为研究内置钢筋笼高强钢管混凝土柱双向偏心受压的力学性能，以偏心率（两种）、钢筋笼构造（两种）、钢管壁厚（两种）为变量，设计并制作了8个高强钢管混凝土试件，对其开展双向偏心受压试验，获得了试件的破坏模式及侧向挠度曲线变化规律，并对试件的持荷能力和抗弯能力进行了分析和讨论。结果表明：小偏心率时，钢筋笼能够使得薄壁钢管构件材料性能发挥得更充分；大偏心率时，内置钢筋笼不能弥补由截面含钢率减小导致的性能退化。此外，在钢管混凝土柱内设置横向拉筋可以有效协助钢管约束核心混凝土，相较于等体积的纵筋而言 ...
陈俊 +4 more
doaj
Understanding consumers to inform market interventions for Singapore's shark fin trade
People and Nature, Volume 6, Issue 2, Page 733-748, April 2024.Abstract Sharks, rays and their cartilaginous relatives (Class Chondrichthyes, herein ‘sharks’) are among the world's most threatened species groups, primarily due to overfishing, which in turn is driven by complex market forces including demand for fins.
Christina Choy +2 more
wiley +1 more source
Calculation of Ultimate Shear Strength of High Strength Concrete Column Reinforced with Concrete Filled Steel Tube [PDF]
, 2005 介绍了以圆钢管为钢骨的劲性高强混凝土柱的剪切性能试验的试验概况,在此基础上研究了它的斜截面承载力计算方法。在计算时,采用了将构件分成几个独立的抗力机构,相互叠加构成构件抗力体系的计算方法的计算模型。进而利用剪切性能试验得到的数据结果进行参数回归,得到以圆钢管为钢骨的劲性高强混凝土柱的斜截面承载力计算公式。General situation about shear experiments of high concrete columns reinforced with concrete filled ...
易伟建 +3 more
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