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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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Impact of Action Observation Therapy along with Usual Physiotherapy Intervention of Individual with Alzheimer’s Disease
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作者 Zahid Bin Sultan Nahid Faruq Ahmed +4 位作者 Tuhin Ahammed Md Kutub Uddin Md Sirazul Islam S M Maruf Hossain Sajib Md Rafiqul Islam 《Advances in Alzheimer's Disease》 CAS 2024年第1期1-10,共10页
Alzheimer’s disease (AD) is a neurodegenerative disorder characterized by cognitive impairments in the initial stage, which lead to severe cognitive dysfunction in the later stage. Action observation therapy (AOT) is... Alzheimer’s disease (AD) is a neurodegenerative disorder characterized by cognitive impairments in the initial stage, which lead to severe cognitive dysfunction in the later stage. Action observation therapy (AOT) is a multisensory cognitive rehabilitation technique where the patient initially observes the actions and then tries to perform. The study aimed to examine the impact of AOT along with usual physiotherapy interventions to reduce depression, improve cognition and balance of a patient with AD. A 67 years old patient with AD was selected for this study because the patient has been suffering from depression, dementia, and physical dysfunction along with some other health conditions like diabetes and hypertension. Before starting intervention, a baseline assessment was done through the Beck Depression Inventory (BDI) tool, the Mini-Cog Scale, and the Berg Balance Scale (BBS). The patient received 12 sessions of AOT along with usual physiotherapy interventions thrice a week for four weeks, which included 45 minutes of each session. After four weeks of intervention, the patient demonstrated significant improvement in depression, cognition, and balance, whereas the BDI score declined from moderate 21/63 to mild 15/63 level of depression. The Mini-Cog score improved from 2/5 to 4/5, and the BBS score increased from 18/56 to 37/56. It is concluded that AOT along with usual physiotherapy intervention helps to reduce depression, improve cognition and balance of people with AD. 展开更多
关键词 Alzheimer’s Disease Action observation Therapy Physiotherapy Intervention
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Do Observations during Patrolling Trips Detect Changes in Wildlife Presence & Diversity in National Parks?
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作者 Samir A. Koko Ahmed A. H. Siddig +4 位作者 Emad H. E. Yasin Nasradeen A. H. Gadallah Mohamed M. A. Adam Ahmed M. M. Hasoba Ameer Awad Mohammed 《Open Journal of Ecology》 2023年第11期794-805,共12页
Globally, mountains encompass spectacular landscapes and a great diversity of species. However, Savannah’s mountains in Sudan have been affected by the loss of diversity due to human activities and climate changes. T... Globally, mountains encompass spectacular landscapes and a great diversity of species. However, Savannah’s mountains in Sudan have been affected by the loss of diversity due to human activities and climate changes. Therefore, this study aims to assess changes in wildlife diversity in Jebel-Eldair Nation Park (JENP) based on only reports from patrolling activities, especially in the absence of regular wildlife monitoring programs. Reports of monthly wildlife observations during patrolling trips were used for the summer season in 2010 and 2018. Findings showed a moderate to high decline in the most important wildlife species (i.e. lion, wild dog, and crest porcupine). Six others are documented as rare species in reserve, including the civet, spotted hyena, striped hyena, jackal, seraval, and Siberian bird. Contrary and despite the diversity reduction, some species witnessed increases in their observation frequency, such as lesser kudu, caracal, monitor, and lunar bird. Moreover, human settlements, agricultural activities, and other anthropogenic factors were found to be the main drivers of biodiversity reduction in JENP. The study recommends adopting this method to detect changes in wildlife communities, especially in a situation of deficiency and lack of funding to conduct regular monitoring programs. 展开更多
关键词 Wildlife Monitoring Biodiversity Jebel-Eldair Nature Reserve Patrolling observations savanna’s Mountain
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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:1
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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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Re-identifying Grateloupia yangjiangensis(Rhodophyta, Halymeniaceae) based on morphological observations, life history and rbcL sequence analyses 被引量:10
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作者 WANG Hongwei GUO Shaoru +3 位作者 ZHANG Xiaoming ZHAO Dan ZHANG Wen LUAN Rixiao 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2014年第4期77-84,共8页
On the basis of morphological observations, life history and molecular phylogeny, Grateloupia yangjiangensis, which is similar to G. filicina, G. orientalis, G. catenata, and G. ramosissima in appearance, was re-exami... On the basis of morphological observations, life history and molecular phylogeny, Grateloupia yangjiangensis, which is similar to G. filicina, G. orientalis, G. catenata, and G. ramosissima in appearance, was re-examined. The results are as follows:(1) the auxiliary-cell ampullae of G. yangjiangensis were of Grateloupia type, thalli was fleshy and gelatinous in texture, and the erect axes were compressed; the cortex was 0.25–0.30 mm thick, consisting of five to seven outer layers, and there were five inner layers of triangular or stellate cells;(2) there was no filamentous stage in the development of the carpospores;(3) the ribulose-1,5-bisphosphate carboxylase/oxygenase gene(rbcL) sequence of four G. yangjiangensis examined showed that there was no intergeneric divergence among them, and for the phylogenetic tree, four sequences of G. yangjiangensis formed a single monophyletic subclade within the large Grateloupia clade of Halymeniaceae. In conclusion, G. yangjiangensis was a single species within the genus Grateloupia. This research provided criterion for identification and cultivation of G. yangjiangensis. 展开更多
关键词 Grateloupia yangjiangensis HALYMENIACEAE RHODOPHYTA morphological observations life history RBCL
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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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Clinical Observation on Quality of Life in Coronary Artery Bypass Grafting Patients Treated According to Syndrome Differentiation of TCM 被引量:2
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作者 阮新民 林宇 +6 位作者 江巍 胡佳心 陈秋雄 吴焕林 陈伯钧 周汉槎 黄春林 《Chinese Journal of Integrated Traditional and Western Medicine》 2004年第1期43-43,共1页
Objective: To evaluate the clinical effect and quality of life (QOL) in coronary artery bypass grafting (CABG) patients treated according to syndrome differentiation of TCM. Methods: Eighty-two CABG patients were allo... Objective: To evaluate the clinical effect and quality of life (QOL) in coronary artery bypass grafting (CABG) patients treated according to syndrome differentiation of TCM. Methods: Eighty-two CABG patients were allocated in the control group (n = 39) treated with conventional method of western medicine, and the TCM-treated group (n 展开更多
关键词 CABG TCM Clinical observation on Quality of life in Coronary Artery Bypass Grafting Patients Treated According to syndrome Differentiation of TCM
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Glycogen and amyloid-beta: key players in the shift from neuronal hyperactivity to hypoactivity observed in Alzheimer's disease? 被引量:3
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作者 Britanny Bass Sarah Upson +3 位作者 Kamolika Roy Emily L.Montgomery Tuula O.Jalonen Ian V.J.Murray 《Neural Regeneration Research》 SCIE CAS CSCD 2015年第7期1023-1025,共3页
Introduction:Alzheimer’s disease(AD)begins to develop decades prior to its clinical manifestation(Sperling et al.,2011),and while it is the most common form of dementia,as of yet there is no cure.Two of the most... Introduction:Alzheimer’s disease(AD)begins to develop decades prior to its clinical manifestation(Sperling et al.,2011),and while it is the most common form of dementia,as of yet there is no cure.Two of the most researched pathological features contributing to disease development are the extracellular amyloid plaques composed of amyloid-beta proteins(Aβ)and neurofibrillary tangles of tau proteins.Another feature of AD is the progression of early neuronal excitability/hyperactivity to silencing/hypoactivity(Palop and Mucke,2010), 展开更多
关键词 Glycogen and amyloid-beta key players in the shift from neuronal hyperactivity to hypoactivity observed in Alzheimer’s disease
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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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Fault detection for nonlinear networked control systems based on fuzzy observer 被引量:6
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作者 Zhangqing Zhu Xiaocheng Jiao 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2012年第1期129-136,共8页
Security and reliability must be focused on control sys- tems firstly, and fault detection and diagnosis (FDD) is the main theory and technology. Now, there are many positive results in FDD for linear networked cont... Security and reliability must be focused on control sys- tems firstly, and fault detection and diagnosis (FDD) is the main theory and technology. Now, there are many positive results in FDD for linear networked control systems (LNCSs), but nonlinear networked control systems (NNCSs) are less involved. Based on the T-S fuzzy-modeling theory, NNCSs are modeled and network random time-delays are changed into the unknown bounded uncertain part without changing its structure. Then a fuzzy state observer is designed and an observer-based fault detection approach for an NNCS is presented. The main results are given and the relative theories are proved in detail. Finally, some simulation results are given and demonstrate the proposed method is effective. 展开更多
关键词 nonlinear networked control system (NNCs fault detection T-s fuzzy model state observer time-delay.
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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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CHINA'S RISE IN THE EYES OF WESTERN OBSERVERS
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作者 Yan Xuetong Director,Center for Chinese Foreign Policy Studies,China Institute of Contemporary In-ternational Relations. 《Contemporary International Relations》 1996年第12期1-16,共16页
An innate sensitivity to and phobia of China’s rise seem to have gripped someWestern observers for years.Early back in the 19th century,Napoleon warned the West to“let Chinasleep”.“There lies a sleeping giant,”be... An innate sensitivity to and phobia of China’s rise seem to have gripped someWestern observers for years.Early back in the 19th century,Napoleon warned the West to“let Chinasleep”.“There lies a sleeping giant,”begins his well-known remark.“Let hersleep.For when she wakes,she will shake the world.”In the 1990s,these 展开更多
关键词 World BANK CHINA’s RIsE IN THE EYEs OF WEsTERN observeRs UsA
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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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2011年腾冲M_(S)5.2地震前近场地球物理异常分析
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作者 马学智 李宗兴 《地震地磁观测与研究》 2024年第2期34-43,共10页
2011年6月20日和8月9日,云南腾冲地区先后发生M_(S)5.2地震,构成腾冲M_(S)5.2双震。2次腾冲M_(S)5.2地震前,地震地球物理异常集中分布在震中100 km范围的近场区,对2次地震近场区内水位、形变(水平摆观测)、水氡、水温、流量等地球物理... 2011年6月20日和8月9日,云南腾冲地区先后发生M_(S)5.2地震,构成腾冲M_(S)5.2双震。2次腾冲M_(S)5.2地震前,地震地球物理异常集中分布在震中100 km范围的近场区,对2次地震近场区内水位、形变(水平摆观测)、水氡、水温、流量等地球物理观测资料进行综合分析,分析发现:①大部分异常持续时间在3个月以上,部分异常始于2010年初,显著中期异常测项为腾冲滇19井水位和腾冲水平摆倾斜观测;②2次地震发震前2个月,龙陵邦腊掌水氡测项出现高值异常;③临震阶段,6月20日腾冲M_(S)5.2地震前,腾冲荷花塘、热海大滚锅出现明显宏观异常,震后异常强度和频率明显增强,对8月9日腾冲M_(S)5.2地震有明显指示意义。值得注意的是,在震中85 km范围内,2011年3月10日发生盈江M_(S)5.8地震,2次腾冲地震的中期异常成为此次盈江地震“共同的地震地球物理异常”,且震后部分异常持续,并出现新的异常,表现出异常时空演化过程与地震活动迁移相匹配的特征。 展开更多
关键词 腾冲M_(s)5.2地震 地球物理观测资料 短临异常 宏观异常
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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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