Results 11 to 20 of about 1,402 (148)
Journal of Advanced Nursing, Volume 77, Issue 4, Page 1825-1838, April 2021., 2021 Abstract Aim To analyse the interactions of associated factors with post stroke fatigue (PSF) after discharge home and determine the predictors of PSF and their impact on stroke survivors. Design A prospective observational study. Methods A total of 94 patients with acute stroke were recruited between May 2019 ‐July 2020. The main outcomes were fatigue,
Ya Su +7 more
wiley +1 more source
Journal of Traumatic Stress, Volume 33, Issue 6, Page 1060-1070, December 2020., 2020 Abstract Survivors of traumatic events commonly suffer from long‐term pain and related somatic symptomatology. To test the predominant hypothesis that survivors’ pain comprises sequela of persistent posttraumatic stress symptoms (PTSS), we assessed the sequential order of symptom development among young survivors of a terrorist attack.
Synne Øien Stensland +4 more
wiley +1 more source
Journal of Advanced Nursing, Volume 76, Issue 11, Page 3104-3112, November 2020., 2020 Abstract Objectives To describe how Registered Nurses make use of a Clinical Decision Support System to triage calls to emergency medical dispatch centres, from the perspective of professional autonomy. Design The study had a descriptive design with a qualitative inductive approach.
Inger K. Holmström +4 more
wiley +1 more source
Risk, Hazards &Crisis in Public Policy, Volume 15, Issue 3, Page 347-373, September 2024.Abstract This study examines the impact of regulations and standard procedures on safety outcomes in unmanned aerial vehicle (UAV) operations, specifically focussing on Norwegian military UAV systems, from a high‐reliability organization (HRO) perspective. By analyzing data from existing regulations, accident reports, and interviews with military drone
Riana Steen +2 more
wiley +1 more source
Theoritical investigations of phase stability, elastic and thermodynamic properties of γ’ phase in Co-X (X:Al, V) based superalloys [PDF]
, 2016 Ni基高温合金是航空航天领域应用最广的高温材料。随着国防科技的发展，新一代的航空航天飞机对发动机涡轮叶片材料的承温能力提出更高的要求。然而Ni基高温合金受熔点的限制，其服役温度很难进一步提高。寻找下一代高温合金成为国内外研究机构的关注焦点。最近，研究者们陆续在Co-Al基和Co-V基合金中发现与Ni3Al类似的γ’析出强化相，由此掀起了新型钴基高温合金的研究热潮。作为新型Co基高温合金中的关键强化相，γ’相的结构稳定性和弹性性质直接决定了Co基高温合金的综合力学性能 ...
邓斌
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, 2004 利用常规方法制备了Pb0.97(La,Nb)0.03Zr0.53Ti0.47O3铁电陶瓷,研究了温度对Pb0.97(La,Nb)0.03Zr0.53Ti0.47O3铁电陶瓷电疲劳性能的影响。结果表明,温度对PLZT铁电陶瓷电疲劳性能影响很大,随着温度的升高,电疲劳速率降低 ...
张颖, 程璇, 陈志武
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Fatigue behavior of powder metallurgy superalloy FGH97 [PDF]
, 2016 The fatigue crack growth rates of powder metallurgy (P/M) superalloy FGH97 with different grain sizes, γ' phase sizes and Hf contents were measured at a 650℃ high temperature condition and compared with those of FGH95 and FGH96 alloys.
DONG Jian-xin +4 more
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Jianzhu Gangjiegou Jinzhan, 2018 为明确建筑和桥梁钢结构低温疲劳性能可以进一步研究的内容和方向,从而提出其低温环境下的抗疲劳设计方法建议,从钢材力学性能与断裂韧性、基于材料与构造细节层面的应力疲劳寿命与疲劳裂纹扩展性能等方面,全面综述了国内外学者在钢结构低温疲劳性能方面取得的研究成果。结果表明,低温对钢结构疲劳性能的影响与钢材种类和其所在结构细节等因素有关;钢材疲劳韧-脆转变温度的存在,对钢材疲劳裂纹扩展行为会产生转折性的影响;对低温下建筑和桥梁钢结构的疲劳性能还要从材料、构造细节和构件3个层面,基于S-N曲线和断裂力学的方法 ...
王元清 +3 more
doaj
Jianzhu Gangjiegou Jinzhan, 2023 为研究开口肋正交异性钢-超高性能混凝土（UHPC）组合桥面的疲劳性能，通过子模型法建立实体-壳单元有限元模型，获得了轮载作用下疲劳敏感细节的应力响应。分析得出，所有疲劳细节应力水平均不大，除了纵肋-横隔板接头处横隔板细节属于有限寿命外，其余疲劳细节均可实现无限寿命。结合试验设计与响应面法，得到了横隔板侧细节应力幅的构造参数回归模型，可不开展数值分析，立即提取给定构造参数下的横隔板侧细节应力幅。为进一步实现横隔板侧细节的无限疲劳寿命设计，采用NSGA-Ⅱ算法对结构开展多目标优化。通过Pareto前沿面得出：
向泽, 祝志文
doaj
基于模糊理论和AHP的高速列车端部舱设计方案评价 [PDF]
, 2015 为了使企业在面对多种结构相似的设计方案,能做出正确,合理的选择,提出了基于模糊理论和层次分析法的某型动车组端部舱设计方案的评价研究.为辅助工程师进行设计方案的选择,在综合考虑制造成本、强度、抗疲劳性能的基础上,构建了设计方案的综合评价指标体系;借助模糊数学理论,利用中值法确定评价因素与评价集的隶属度,利用层次分析法确定因素权重,对动车组端部舱三种设计方案分别进行模糊综合评价,从中获得最优设计方案.实践表明,所建立的评价体系可以快速获得客观综合评价结果,能为企业设计方案的择优选择提供依据 ...
王一丰, 董小鹏, 马思群
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