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Family journey in the process of recovery of schizophrenia:A qualitative study
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作者 Sifa FAUZIAH Ummi Malikal BALQIS +2 位作者 Obar OBAR Asep SURYADIN Stefani CHAIRUNISA 《Journal of Integrative Nursing》 2024年第2期83-89,共7页
Objective:The aim of this research is to explore the life experiences of schizophrenic families in accompanying the recovery process.Methods:This study uses a qualitative method with descriptive phenomenology to expla... Objective:The aim of this research is to explore the life experiences of schizophrenic families in accompanying the recovery process.Methods:This study uses a qualitative method with descriptive phenomenology to explain phenomena from family experiences.The number of the participants was eight families who had family members with schizophrenia.Sampling was determined by purposive sampling.Data were collected through in-depth interviews and analyzed using the Colaizzi method.Results:The results of this study show four themes that emerged including(1)psychological burden on the family,(2)families needing support in the recovery process,(3)obstacles due to social stigma,and(4)family gratitude for being able to pass the test patiently.Conclusion:The schizophrenia family’s journey in the recovery process is very long.They are required to endure in assisting the recovery process.Experiences felt by the family include feelings,obstacles,and hopes that arise in carrying out their role to assist the recovery process which aims to improve the health of schizophrenia patients.The findings from this study provide insight for nurses to be able to pay attention to family psychological problems by strengthening families through home visits and health promotion related to the recovery process of survivor schizophrenia. 展开更多
关键词 Family journey life experiences recovery process sCHIZOPHRENIA
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Crystalline and amorphous metal sulfide composite electrode materials with long cycle life:Preparation and performance of hybrid capacitors
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作者 DING Ning WANG Siyu +4 位作者 YU Shihua XU Pengcheng HAN Dandan SHI Dexin ZHANG Chao 《无机化学学报》 SCIE CAS CSCD 北大核心 2024年第9期1784-1794,共11页
Crystalline@amorphous NiCo_(2)S_(4)@MoS_(2)(v-NCS@MS)nanostructures were designed and constructed via an ethylene glycol-induced strategy with hydrothermal synthesis and solvothermal method,which simultaneously realiz... Crystalline@amorphous NiCo_(2)S_(4)@MoS_(2)(v-NCS@MS)nanostructures were designed and constructed via an ethylene glycol-induced strategy with hydrothermal synthesis and solvothermal method,which simultaneously realized the defect regulation of crystal NiCo_(2)S_(4) in the core.Taking advantage of the flexible protection of an amor-phous shell and the high capacity of a conductive core with defects,the v-NCS@MS electrode exhibited high specif-ic capacity(1034 mAh·g^(-1) at 1 A·g^(-1))and outstanding rate capability.Moreover,a hybrid supercapacitor was assembled with v-NCS@MS as cathode and activated carbon(AC)as anode,which can achieve remarkably high specific energy of 111 Wh·kg^(-1) at a specific power of 219 W·kg^(-1) and outstanding capacity retention of 80.5%after 15000 cycling at different current densities. 展开更多
关键词 crystalline@amorphous heterostructure NiCo2s4@Mos2 hybrid supercapacitor defect design long cycle life
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Life′s Simple 7干预减轻Her⁃2阳性乳腺癌患者化疗相关心血管系统损害的研究 被引量:2
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作者 吴军 崔伟燕 +2 位作者 李平 张青凤 欧月珍 《实用医学杂志》 CAS 北大核心 2023年第13期1647-1651,1656,共6页
目的探讨Life′s Simple 7(LS7)干预减轻Her⁃2阳性乳腺癌患者根治术后化疗相关心血管系统损害的作用。方法将120例Her⁃2阳性并接受标准化乳腺癌化疗的患者随机等量分为对照组及LS7组,对照组为标准化疗方案,LS7组为对照组基础上给予LS7干... 目的探讨Life′s Simple 7(LS7)干预减轻Her⁃2阳性乳腺癌患者根治术后化疗相关心血管系统损害的作用。方法将120例Her⁃2阳性并接受标准化乳腺癌化疗的患者随机等量分为对照组及LS7组,对照组为标准化疗方案,LS7组为对照组基础上给予LS7干预12个月,后续通过比较两组治疗前后心血管系统损伤程度、焦虑、抑郁及生活质量等指标评价其对心血管系统损害的改善作用。结果相较于对照组,LS7组LS7总评分及7项心血管健康指标均优于对照组(P<0.05),LS7组LVEF较高(P<0.05)、NT⁃proBNP较低(P<0.05),焦虑和抑郁评分较低(P<0.05)、生活质量评分较高(P<0.05)。结论LS7干预可显著减轻Her⁃2阳性乳腺癌化疗相关心血管系统损害并改善乳腺癌患者的心理状况和生活质量,值得在临床推广。 展开更多
关键词 lifes simple 7 乳腺癌 心血管健康 心理状况 生活质量
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基于断裂力学的腐蚀钢丝疲劳S-N曲线研究 被引量:1
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作者 叶华文 叶杨帆 +2 位作者 邓雪峰 杨军川 徐勋 《铁道科学与工程学报》 EI CAS CSCD 北大核心 2024年第5期1990-2000,共11页
高强冷拔钢丝因其优异的力学性能被广泛应用于缆索承重结构,服役过程中钢丝腐蚀与断裂威胁着结构安全。钢丝腐蚀后表面的蚀坑因应力集中效应易产生疲劳裂纹,因此腐蚀钢丝剩余疲劳寿命主要取决于裂纹的扩展阶段,且裂纹扩展受到腐蚀程度(... 高强冷拔钢丝因其优异的力学性能被广泛应用于缆索承重结构,服役过程中钢丝腐蚀与断裂威胁着结构安全。钢丝腐蚀后表面的蚀坑因应力集中效应易产生疲劳裂纹,因此腐蚀钢丝剩余疲劳寿命主要取决于裂纹的扩展阶段,且裂纹扩展受到腐蚀程度(初始损伤)的显著影响。精确表征腐蚀程度并准确评估服役期钢丝腐蚀后的剩余寿命,仍是亟待解决的维修难题。首先采用蚀坑最大深度表征钢丝腐蚀程度,以应力强度因子幅作为裂纹扩展驱动力指标,基于断裂力学的Paris公式建立受拉钢丝裂纹扩展理论模型,进而推导腐蚀钢丝的疲劳S-N曲线。大量既有的腐蚀钢丝疲劳试验结果与理论预测值的比较验证了所提理论模型及疲劳S-N曲线的合理性和有效性。含多个蚀坑的钢丝裂纹扩展有限元模拟表明,等效单裂纹适用于多腐蚀坑钢丝疲劳寿命的简化分析。参数分析表明,蚀坑深度和腐蚀环境是腐蚀钢丝疲劳强度的关键影响因素,而应力比和疲劳加载频率影响较小,所提出的S-N曲线在钢丝常规服役条件下适用于评估其剩余寿命,可得到合理的预测结果。基于断裂力学所提的理论方法和疲劳S-N曲线可为腐蚀钢丝的疲劳强度和寿命评估提供参考。 展开更多
关键词 冷拔钢丝 腐蚀 剩余寿命 s-N曲线 蚀坑深度
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液压成形对液体火箭发动机多层增强S型波纹管结构疲劳寿命的影响
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作者 张涵 张东升 朱卫平 《火箭推进》 CAS 北大核心 2024年第1期113-126,共14页
完善液体火箭发动机燃气摇摆装置中增强S型波纹管组件的疲劳寿命评估方法,提高其疲劳寿命预测精度,是发展可重复使用液体火箭发动机的重要课题之一。针对多层增强S型波纹管,为了计算其液压成形后的实际寿命数据,了解成形工艺对其疲劳寿... 完善液体火箭发动机燃气摇摆装置中增强S型波纹管组件的疲劳寿命评估方法,提高其疲劳寿命预测精度,是发展可重复使用液体火箭发动机的重要课题之一。针对多层增强S型波纹管,为了计算其液压成形后的实际寿命数据,了解成形工艺对其疲劳寿命的影响,提出一种充分考虑成形制备过程对结构不同区域几何构型和材料力学性能造成差异化影响后的波纹管疲劳寿命分析方法。该方法基于成形仿真和材料拉伸试验结果,构建实际波纹管有限元模型并进行三维仿真分析,得到其在高内压和不同摆动工况下结构危险点的循环载荷信息,并根据波纹管结构的低周疲劳失效特点采用子午向应力应变数据,以及经过平均应力应变修正的Manson-Coffin(M-C)公式对波纹管的循环寿命进行估算和对比分析。结果表明:波纹管疲劳寿命薄弱点位置和大小均与循环摆角有关;在预测计算中考虑液压成形作用影响更接近实际场景,所得结构疲劳寿命大小和所在区域均与理论模型值存在差异,在结构设计、优化和健康监测中不应忽视其影响。 展开更多
关键词 重复使用液体火箭发动机 增强s型波纹管 疲劳寿命 液压成形
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Factors influencing quality of life in Chinese patients with dementia: a systematic review
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作者 Jin-Long Ma Bao-Jian Wei Yan-Mei Lang 《Aging Communications》 2023年第2期35-42,共8页
Background:Dementia is a group of nervous system diseases characterized by progressive cognitive decline,leading to a loss of self-care ability and a decline in well-being.This places a significant burden on the globa... Background:Dementia is a group of nervous system diseases characterized by progressive cognitive decline,leading to a loss of self-care ability and a decline in well-being.This places a significant burden on the global healthcare system,with Chinese patients accounting for approximately one-quarter of the world’s dementia cases.Therefore,it is crucial to identify factors that impact the quality of life(QOL)among elderly Chinese individuals with dementia.Method:To achieve this,we conducted a comprehensive search of several databases,including PubMed,Embase,Web of Science,the Cochrane Library,China National Knowledge Infrastructure,Wanfang Data,China VIP Database and China Biomedical Literature Database.We reviewed cross-sectional studies from the inception of these databases until March 27,2022.QOL outcomes were assessed using standardized scales in the studies included in this review.Results:The search yielded a total of 1,235 relevant articles,from which we finally included 21 cross-sectional studies and one longitudinal study after rigorous quality assessment.Among these,10 studies were classified as high quality,while 12 were classified as fair quality.Through our analysis,we identified 28 patient-rated QOL factors and 14 caregiver-rated QOL factors.These factors were categorized into three groups:patient,disease-related and caregiver.Factors commonly found to influence patient-rated QOL included age,education,marital status,depression,self-care ability,dementia severity,cognitive function,behavioral and psychological symptoms of dementia and caregiver burden.Similarly,factors commonly influencing caregiver-rated QOL included economic status,depression,self-care ability,dementia severity,cognitive function,behavioral and psychological symptoms of dementia and caregiving time.Conclusion:This review clarifies the factors that influence the QOL of Chinese individuals with dementia.When implementing interventions,it is crucial to consider the differences between patient-rated QOL and caregiver-proxy-rated QOL,as well as their respective influencing factors. 展开更多
关键词 DEMENTIA Alzheimer’s disease quality of life social support protective factors
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具有稚虫迁徙机制的S型自适应混沌蜉蝣算法
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作者 张恒齐 钱谦 《化工自动化及仪表》 CAS 2024年第2期262-273,共12页
针对蜉蝣优化算法(MA)全局搜索能力较弱,对子代优秀个体有效信息利用不够充分的缺点,以及在计算中后期易陷入局部收敛,进而影响优化效果的问题,提出一种具有稚虫迁徙机制的S型自适应混沌蜉蝣优化算法(S-AMA)。S-AMA算法首先采用Logisti... 针对蜉蝣优化算法(MA)全局搜索能力较弱,对子代优秀个体有效信息利用不够充分的缺点,以及在计算中后期易陷入局部收敛,进而影响优化效果的问题,提出一种具有稚虫迁徙机制的S型自适应混沌蜉蝣优化算法(S-AMA)。S-AMA算法首先采用Logistic混沌映射产生蜉蝣种群,增加算法初期种群的多样性;随后,将蜉蝣生命周期进行数学建模,并引入S型生命系数替换原有的重力惯性系数,动态调整算法探索能力和开发能力间的平衡性;最后,根据蜉蝣在缺氧环境下的种群活动,引入稚虫迁徙机制强化子代优秀个体摆脱局部最优的能力,进而更加充分地搜索最优解附近的区域,以增强算法的收敛精度。实验部分将S-AMA应用于标准函数测试集,并分别进行优化对比实验、Wilcoxon秩和检验。结果表明:与对比算法相比,S-AMA算法具有更好的寻优能力、收敛速度及鲁棒性。 展开更多
关键词 s型自适应混沌蜉蝣优化算法(s-AMA) 稚虫迁徙机制 混沌映射 s型生命系数 莱维飞行
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Expectations and Level of Satisfaction of the Patient with Parkinson’s Disease Undergoing Deep Brain Stimulation Surgery at the National Institute of Neurology and Neurosurgery
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作者 Paola Bazán-Rodríguez Eduardo Ichikawa-Escamilla +4 位作者 Etienne Reséndiz-Henríquez Carlos E. Martínez-Cortés Amin Cervantes-Arriaga Mayela Rodríguez-Violante Lisette Bazán-Rodríguez 《Advances in Parkinson's Disease》 CAS 2024年第1期1-7,共7页
Background: Deep brain stimulation (DBS) is an established treatment for patients with advanced Parkinson’s disease (PD). Reports show continued patient satisfaction after surgery despite not maintaining clinical imp... Background: Deep brain stimulation (DBS) is an established treatment for patients with advanced Parkinson’s disease (PD). Reports show continued patient satisfaction after surgery despite not maintaining clinical improvement as measured by evolution scales. Objectives: The present study sought to explore expectations and level of satisfaction in patients after DBS surgery with a semi-structured questionnaire and subsequent correlation with functional scales, Quality of Life (QoL), and motor and non-motor symptoms. Methods: We performed descriptive statistics to represent demographic data, Wilcoxon rank tests to determine significant differences, and Spearman correlation between the applied scales. Results: We evaluated 20 patients with a history of DBS surgery. 45% were female, with a mean age of 55.7 ± 14.15 years, a mean disease duration of 13.42 ± 8.3 years, and a mean time after surgery of 3.18 ± 1.86 years. Patients reported surgery meeting expectations in 85.5% and continued satisfaction in 92%. These two variables showed a significant correlation. Conclusions: This sample of patients remained satisfied after DBS surgery, although we found no differences in motor and non-motor clinimetric scales. Further studies are needed to confirm the importance of assessing quality of life in patients with DBS. 展开更多
关键词 Parkinson’s Disease Quality of life Deep Brain stimulation Patient satisfaction
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基于B/S架构的军校教材管理系统分析与设计
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作者 李爽 范振凯 《天津科技》 2024年第3期56-59,64,共5页
近年来,军校教材呈现爆发式增长,旧的教材管理系统已不能有效进行信息化管理,工作效率低。根据军校对教材管理的特定需求,对系统和技术可行性进行客观分析,提出一种基于B/S架构的军校教材管理系统设计,并探讨系统运行性能指标,对系统的... 近年来,军校教材呈现爆发式增长,旧的教材管理系统已不能有效进行信息化管理,工作效率低。根据军校对教材管理的特定需求,对系统和技术可行性进行客观分析,提出一种基于B/S架构的军校教材管理系统设计,并探讨系统运行性能指标,对系统的拓扑结构、运行环境、功能实现等进行全面设计,充分利用军校现有的校园网络系统实现每册教材的全生命周期管理。 展开更多
关键词 数字校园 全生命周期信息化管理 循环利用 快速追溯 B/s架构
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基于ABAQUS的汽车转向拉杆心轴疲劳失效分析及改进
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作者 叶丹 余超群 +2 位作者 刘雅琪 李纯军 左学谦 《机械管理开发》 2024年第7期11-14,共4页
转向拉杆是汽车转向机构中的重要零件,它在转向系中起着传递运动的作用,直接影响汽车操纵的稳定性、运行的安全性和轮胎的使用寿命。运用ABAQUS对某车型转向拉杆外球节心轴进行CAE分析并结合其材料的S-N曲线验证第一次根据经验设计出的... 转向拉杆是汽车转向机构中的重要零件,它在转向系中起着传递运动的作用,直接影响汽车操纵的稳定性、运行的安全性和轮胎的使用寿命。运用ABAQUS对某车型转向拉杆外球节心轴进行CAE分析并结合其材料的S-N曲线验证第一次根据经验设计出的产品的不合理性,然后通过CAE有限元分析方法设计出符合客户疲劳寿命要求的产品,并通过实验验证。 展开更多
关键词 汽车转向拉杆 疲劳寿命 CAE 心轴 s-N曲线
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朱氏滋脾固肾方Ⅰ号对慢性肾脏病2~4期脾肾气虚证症状评分、SCr及BUN的影响
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作者 费佳 马源 朱辟疆 《西部中医药》 2024年第8期111-114,共4页
目的:探讨朱氏滋脾固肾方Ⅰ号治疗慢性肾脏病(chronic kidney disease,CKD)2~4期脾肾气虚证的临床效果及对症状评分、血清肌酐(Serum creatinine,SCr)、血清尿素氮(blood urea nitrogen,BUN)等指标的影响。方法:选取CKD 2~4期患者60例,... 目的:探讨朱氏滋脾固肾方Ⅰ号治疗慢性肾脏病(chronic kidney disease,CKD)2~4期脾肾气虚证的临床效果及对症状评分、血清肌酐(Serum creatinine,SCr)、血清尿素氮(blood urea nitrogen,BUN)等指标的影响。方法:选取CKD 2~4期患者60例,依据随机数字表法分为观察组和对照组各30例。对照组采取西医常规治疗,观察组在对照组治疗基础上联合朱氏滋脾固肾方Ⅰ号治疗,两组患者均持续治疗12周,后续治疗在专科门诊随访。比较两组临床效果、症状评分、生活质量评分、肾功能指标水平(SCr、BUN)及不良反应情况。结果:观察组总有效率为86.67%(26/30),高于对照组的60.00%(18/30)(P<0.05)。治疗后两组各项症状评分、SCr及BUN水平均较治疗前下降(P<0.05),生活质量评分均上升(P<0.05),且观察组上述指标下降或上升较对照组显著(P<0.05)。两组不良反应发生率比较差异无统计学意义(P>0.05)。结论:朱氏滋脾固肾方Ⅰ号治疗CKD 2~4期脾肾气虚证患者具有显著疗效,可以改善患者肾功能及生活质量。 展开更多
关键词 肾脏病 慢性 朱氏滋脾固肾方Ⅰ号 肾功能 生活质量 临床疗效
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A Voyage of Discovery A journey from Cairo ends in love and a new life in Beijing
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作者 Aly Thabet Aly Mohamed Farag 《ChinAfrica》 2016年第6期58-58,共1页
I HAVE spent the golden years of my life and career in China, having come to Beijing from Cairo as a 22-year-old, That was in 2008 and this is 2016, so you could call it a life-time experience.
关键词 A Voyage of Discovery A journey from Cairo ends in love and a new life in Beijing
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基于nCode Design-Life的某车架疲劳可靠性分析 被引量:54
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作者 李成林 宋莎莎 韩振南 《图学学报》 CSCD 北大核心 2014年第1期42-45,共4页
针对某型半挂牵引车车架局部出现裂纹或者断裂现象,通过有限元理论和疲劳分析理论相结合进行了车架的有限元分析和疲劳可靠性分析。首先对该车架进行了建模和有限元静态特性分析,然后定义了特定的时间载荷序列数据和材料参数,选用了S-N... 针对某型半挂牵引车车架局部出现裂纹或者断裂现象,通过有限元理论和疲劳分析理论相结合进行了车架的有限元分析和疲劳可靠性分析。首先对该车架进行了建模和有限元静态特性分析,然后定义了特定的时间载荷序列数据和材料参数,选用了S-N疲劳设计和静态疲劳分析方法,利用疲劳分析软件nCode Design-Life对该车架进行疲劳可靠性分析,得出该车架的疲劳结果云图和各节点的疲劳寿命,并从相关云图中确定出车架容易破坏的位置和其寿命之后再进行样车实验验证。 展开更多
关键词 车架 疲劳可靠性 s-N曲线 有限元 nCode Design-life
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A Model of the Fatigue Life Distribution of Composite Laminates Based on Their Static Strength Distribution 被引量:7
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作者 吴富强 姚卫星 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2008年第3期241-246,共6页
The reasons of the static strength dispersion and the fatigue life dispersion of composite laminates are analyzed in this article. It is concluded that the inner original defects, which derived from the manufacturing ... The reasons of the static strength dispersion and the fatigue life dispersion of composite laminates are analyzed in this article. It is concluded that the inner original defects, which derived from the manufacturing process of composite laminates, are the common and major reason of causing the random distributions of the static strength and the fatigue life. And there is a correlative relation between the two distributions. With the study of statistical relationship between the fatigue loading and the fatigue life in the uniform confidence level and the same survival rate S-N curves of material, the relationship between the static strength distribution and the fatigue life distribution through a material S-N curve model has been obtained. And then the model which is used to describe the distributions of fatigue life of composites, based on their distributions of static strength, is set up. This model reasonably reflects the effects of the inner original defects on the static strength dispersion and on the fatigue life dispersion of composite laminates. The experimental data of three kinds of composite laminates are employed to verify this model, and the results show that this model can predict the random distributions of fatigue life for composites under any fatigue loads fairly well. 展开更多
关键词 COMPOsITE static strength fatigue life s-N curve random distribution
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四川泸定M_(S)6.8地震灾害主要特征分析 被引量:4
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作者 张翼 宴金旭 +7 位作者 赵雪慧 周琪 吴今生 陈维锋 范开红 郑逸 刘杨 吴朋 《中国地震》 北大核心 2023年第1期1-20,共20页
四川泸定6.8级地震是继2013年芦山7.0级地震至今,四川境内遭受灾害面积最大、死亡人数最多的一次地震,造成了一定程度的房屋和基础设施损坏,诱发了大量的地质灾害,具有明显的区域特点.本文基于四川省抗震救灾指挥部和地震现场工作队的... 四川泸定6.8级地震是继2013年芦山7.0级地震至今,四川境内遭受灾害面积最大、死亡人数最多的一次地震,造成了一定程度的房屋和基础设施损坏,诱发了大量的地质灾害,具有明显的区域特点.本文基于四川省抗震救灾指挥部和地震现场工作队的一手资料,从灾情获取的时间序列、震害的空间分布、生命损失、建筑物破坏、地震地质灾害的强度等方面开展了本次地震的灾害特征分析.初步得到如下认识:①黑箱期时间为1.5h,死亡人数统计比小于1%,24h获得了半数以上伤亡信息,符合中强地震灾情渐进式获取的一般规律;②本次地震影响面较广,有感面积为816194km^(2),烈度Ⅵ度区域以上面积为19089km^(2),Ⅸ度区面积为280km^(2),与一次7级地震受灾范围相当;③地震灾害重且破坏集中,截至2022年9月11日17时共造成93人死亡,25人失联,导致房屋垮塌415间,严重损坏5566间,一般损坏19890间,新增有威胁对象的地震地质灾害点565处,其中,约92%的死亡人员地点、68%的地震地质灾害点、多数的毁坏及严重破坏房屋位置,集中分布在Ⅷ度和Ⅸ度区;④滑坡、崩塌等次生地质灾害是造成本次地震人员死亡最主要的原因,占总死亡(含失联)人数的86%. 展开更多
关键词 四川泸定6.8级地震 地震灾害 灾害特征 烈度分布 生命损失 次生灾害
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基于B-S分布的智能电能表寿命预计方法研究 被引量:2
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作者 程磊 陆蔺 《电测与仪表》 北大核心 2023年第3期188-194,共7页
针对目前智能电能表寿命预计普遍采用Weibull分布的情况,文中介绍了概率物理方法中一个重要的失效模型:B-S疲劳寿命分布及其可靠性分析,并推导出两参数B-S分布的极大似然估计值及近似区间。B-S分布适合描述失效产品的寿命规律,主要应用... 针对目前智能电能表寿命预计普遍采用Weibull分布的情况,文中介绍了概率物理方法中一个重要的失效模型:B-S疲劳寿命分布及其可靠性分析,并推导出两参数B-S分布的极大似然估计值及近似区间。B-S分布适合描述失效产品的寿命规律,主要应用于疲劳失效以及电子产品性能退化失效的分析研究。文中将两参数B-S分布引入智能电能表寿命预计,对寿命数据是否来自两参数B-S分布总体的样本进行了拟合检验,采用极大似然法和最小二乘法对两参数B-S分布进行了参数估计,建立了基于B-S分布的寿命预计方法,通过实际算例验证了B-S分布寿命预计方法的实用性。文中研究内容对于电能表寿命预计、轮换周期的确定提供了一种新方法,同时对于电能表可靠性评价提供了新思路。 展开更多
关键词 B-s分布 智能电能表 寿命预计 拟合检验
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基于nCode Design-Life的电动客车车架疲劳寿命分析 被引量:14
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作者 周美施 张铁柱 +2 位作者 尹怀仙 张洪信 刘高君 《青岛大学学报(工程技术版)》 CAS 2015年第4期96-100,共5页
针对某型电动客车车架疲劳及寿命问题,本文以有限元理论和疲劳分析理论相结合的方法,对电动客车车架进行静强度分析和疲劳寿命校核,建立有限元模型并进行受力分析,定义特定的载荷谱和材料疲劳数据;同时利用S-N静态疲劳设计方法,选用疲... 针对某型电动客车车架疲劳及寿命问题,本文以有限元理论和疲劳分析理论相结合的方法,对电动客车车架进行静强度分析和疲劳寿命校核,建立有限元模型并进行受力分析,定义特定的载荷谱和材料疲劳数据;同时利用S-N静态疲劳设计方法,选用疲劳分析软件nCode Design-Life对该车架进行疲劳可靠性分析。分析结果表明,该车架的疲劳寿命为1.558×106次,许用行驶里程为650 000km,与公交客运车行驶里程参考值约为400 000km相比,结果满足要求。该研究实现了电动车减重节能,增加了续驶里程,为车架优化设计及寿命模型的建立提供了理论依据。 展开更多
关键词 车架 疲劳强度 s-N曲线 有限元 nCode Design-life
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Impact of body mass index and gender on quality of life in patients with gastroesophageal reflux disease 被引量:5
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作者 Shou-Wu Lee Han-Chung Lien +3 位作者 Chi-Sen Chang Yen-Chun Peng Chung-Wang Ko Ming-Chih Chou 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第36期5090-5095,共6页
AIM: To investigate the symptom presentation and quality of life in obese Chinese patients with gastro- esophageal reflux disease (GERD). MKTHODS: Data from patients diagnosed with GERD according to the Montreal d... AIM: To investigate the symptom presentation and quality of life in obese Chinese patients with gastro- esophageal reflux disease (GERD). MKTHODS: Data from patients diagnosed with GERD according to the Montreal definition, were collected between January 2009 to March 2010. The enrolled patients were assigned to the normal [body mass in- dex (BMI) 〈 25 kg/m2], overweight (25-30 kg/m2), and obese (BMI 〉 30 kg/m2) groups. General demographic data, endoscopic findings, and quality of life of the three groups of patients were analyzed and compared.and 15 patients were classified in the normal, over- weight, and obese, respectively. There was significantly more erosive esophagitis (73.3% vs 64.3% vs 39.2%, P = 0.002), hiatal hernia (60% vs 33.9% vs 16.7%, P = 0.001), and males (73.3% vs 73.2% vs 32.4%, P = 0.001) in the obese cases. The severity and frequency of heartburn, not acid regurgitation, was positively cor- related with BMI, with a significant association in men, but not in women. Obese patients were prone to have low quality of life scores, with obese women having the lowest scores for mental health. CONCLUSION: In patients with GERD, obese men had the most severe endoscopic and clinical presenta- tion. Obese women had the poorest mental health. 展开更多
关键词 Gastroesophageal reflux disease GENDER HEARTBURN life's quality OBEsITY
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Higher vitamin D serum concentration increases health related quality of life in patients with inflammatory bowel diseases 被引量:11
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作者 Tibor Hlavaty Anna Krajcovicova +4 位作者 Tomas Koller Jozef Toth Monika Nevidanska Martin Huorka Juraj Payer 《World Journal of Gastroenterology》 SCIE CAS 2014年第42期15787-15796,共10页
AIM: To investigate the effect of vitamin D (VD) concentrations and VD supplementation on health related quality of life in inflammatory bowel disease (IBD) patients.
关键词 Vitamin D Crohn’ s disease Ulcerative colitis Health related quality of life Vitamin D supplementation
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基于nCode Design-Life的重型起重设备疲劳寿命预测研究 被引量:7
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作者 李现春 胡晓兵 +1 位作者 李毅 徐营利 《机械》 2017年第8期1-6,共6页
为研究重型起重设备的疲劳损伤和寿命,以门式起重机为算例建立有限元模型,通过有限元静力学分析,最大等效应力位于跨中受拉区,得出门式起重机强度和刚度满足要求。采用nCode Design-Life疲劳仿真软件利用S-N疲劳设计方法对有限元静力学... 为研究重型起重设备的疲劳损伤和寿命,以门式起重机为算例建立有限元模型,通过有限元静力学分析,最大等效应力位于跨中受拉区,得出门式起重机强度和刚度满足要求。采用nCode Design-Life疲劳仿真软件利用S-N疲劳设计方法对有限元静力学特性和疲劳损伤进行分析,得到门式起重机疲劳寿命分布云图和疲劳损伤云图,其最小寿命满足工程要求。为了研究载荷变化对起重机寿命的影响,通过改变载荷缩放因子来改变时间载荷序列的大小,对比分析载荷变化后的寿命情况,得出随机载荷减小门式起重机寿命大大增加,过载对门式起重机的疲劳寿命有显著的影响。 展开更多
关键词 门式起重机 疲劳寿命 时间载荷序列 s-N曲线 nCodeDesign-life
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