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电化学（中英文） 2024年第7期30卷 1-27页

作者： fa-Dong Chen Zhuo-Yang Xie Meng-Ting Li Si-guo Chen Wei Ding Li Li Jing Li Zi-Dong Wei State key Laboratory of Advanced Chemical Power Sources(Chongqing University) College of Chemistry and Chemical EngineeringChongqing UniversityChongqing400044China

Two major challenges,high cost and short lifespan,have been hindering the commercialization process of lowtemperature fuel *** Wei's group has been focusing on decreasing cathode Pt loadings without losses of activity and durability,and their research advances in this area over the past three decades are briefly reviewed *** the Pt-based catalysts and the low Pt usage,they have firstly tried to clarify the degradation mechanism of Pt/C catalysts,and then demonstrated that the activity and stability could be improved by three strategies:regulating the nanostructures of the active sites,enhancing the effects of support materials,and optimizing structures of the three-phase *** Pt-free catalysts,especialiy carbon-based ones,several strategies that they proposed to enhance the activity of nitrogen-/heteroatom-doped carbon catalysts are firstly ***,an indepth understanding of the degradation mechanism for carbon-based catalysts is discussed,and followed by the corresponding stability enhancement ***,the carbon-based electrode at the micrometer-scale,faces the challenges such as low active-site density,thick catalytic layer,and the effect of hydrogen peroxide,which require rational structure design for the integral cathodic *** review finally gives a brief conclusion and outlook about the low cost and long lifespan of cathodic oxygen reduction catalysts.

关键词： Fuel cell Oxygen reduction reaction Pt-based catalyst Carbon-based catalyst

影像学检查在子宫良恶性病变鉴别诊断中的价值

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中国实用妇科与产科杂志 2024年第9期40卷 895-898页

作者：吕发金王璐重庆医科大学附属第一医院放射科重庆医科大学生物医学工程学院(超声医学工程国家重点实验室) 重庆400016

微无创治疗因其创伤小、恢复快等优势,在子宫病变治疗中应用广泛。超声、CT以及磁共振成像(MRI)等影像诊断手段能够在术前辅助确定病变的良恶性,有助于制定个性化治疗方案,确保治疗的精确性和安全性,对患者的康复和生活质量具有重要意义... 详细信息

微无创治疗因其创伤小、恢复快等优势,在子宫病变治疗中应用广泛。超声、CT以及磁共振成像(MRI)等影像诊断手段能够在术前辅助确定病变的良恶性,有助于制定个性化治疗方案,确保治疗的精确性和安全性,对患者的康复和生活质量具有重要意义。MRI具有高软组织及空间分辨率,在术前诊断中可作为首选的影像检查,文章主要阐述MRI的不同成像序列在子宫良恶性病变诊断中的应用及鉴别要点。

关键词：磁共振成像子宫疾病良恶性鉴别

从爱国消费到习惯形成:平台经济背景下电商中介效应对国货销售的影响研究

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技术经济 2024年第2期43卷 33-45页

作者：韩发张薇马来西亚理工大学阿兹曼哈希姆国际商学院马来西亚柔佛81310 内蒙古鸿德文理学院经济管理系呼和浩特010010 内蒙古财经大学旅游学院呼和浩特010051

随着华为Mate60 Pro的回归,国内消费者对国货的热情再度被激发。与此同时,近年来各大电商平台上的国货销售量快速增长。国潮活动、网店预售和直播销售成为消费者购买国货的重要方式。然而,如何利用平台经济和电商的力量将消费热情转化... 详细信息

随着华为Mate60 Pro的回归,国内消费者对国货的热情再度被激发。与此同时,近年来各大电商平台上的国货销售量快速增长。国潮活动、网店预售和直播销售成为消费者购买国货的重要方式。然而,如何利用平台经济和电商的力量将消费热情转化为消费习惯,并促使消费者形成常态化的购买意愿,是亟须深入研究和探讨的课题。本研究采用扎根理论和偏最小二乘定量分析方法,验证了电商平台在促进国货消费习惯形成中的中介作用。结果表明,电商平台在开展国货销售活动时应以中华文化为基础,重点满足消费者对精神追求的需求。这一研究为未来的实践奠定了理论基础,同时也填补了相关研究的不足和空白。

关键词：爱国消费消费习惯电商平台扎根理论偏最小二乘法

Serum bile acid and unsaturated fatty acid profiles of non-alcoholic fatty liver disease in type 2 diabetic patients

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World Journal of Diabetes 2024年第5期15卷 898-913页

作者： Su-Su Feng Si-Jing Wang Lin guo Pan-Pan Ma Xiao-Long Ye Ming-Lin Pan Bo Hang Jian-Hua Mao Antoine M Snijders Yi-Bing Lu Da-fa Ding Department of Endocrinology The Second Affiliated Hospital of Nanjing Medical UniversityNanjing 210011Jiangsu ProvinceChina Biological Systems and Engineering Division Lawrence Berkeley National LaboratoryBerkeleyCA 94720United States

BACkgROUND The understanding of bile acid(BA)and unsaturated fatty acid(Ufa)profiles,as well as their dysregulation,remains elusive in individuals with type 2 diabetes mellitus(T2DM)coexisting with non-alcoholic fatty liver disease(NAFLD).Investigating these metabolites could offer valuable insights into the pathophy-siology of NAFLD in *** To identify potential metabolite biomarkers capable of distinguishing between NAFLD and *** A training model was developed involving 399 participants,comprising 113 healthy controls(HCs),134 individuals with T2DM without NAFLD,and 152 individuals with T2DM and *** validation encompassed 172 *** patients were divided based on liver fibrosis *** analytical approach employed univariate testing,orthogonal partial least squares-discriminant analysis,logistic regression,receiver operating characteristic curve analysis,and decision curve analysis to pinpoint and assess the diagnostic value of serum *** Compared to HCs,both T2DM and NAFLD groups exhibited diminished levels of specific *** Ufas,particular acids exhibited a positive correlation with NAFLD risk in T2DM,while theω-6:ω-3 Ufa ratio demonstrated a negative *** ofα-linolenic acid andγ-linolenic acid were linked to significant liver fibrosis in *** validation cohort substantiated the predictive efficacy of these biomarkers for assessing NAFLD risk in T2DM *** This study underscores the connection between altered BA and Ufa profiles and the presence of NAFLD in individuals with T2DM,proposing their potential as biomarkers in the pathogenesis of NAFLD.

关键词： Bile acid Non-alcoholic fatty liver disease Type 2 diabetes mellitus Unsaturated fatty acid

Interindividual Age-Independent Differences in Human CX43 Impact Ventricular Arrhythmic Risk

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Research 2024年第3期6卷 417-432页

作者： Laura garcía-Mendívil María Pérez-Zabalza Antoni Oliver-gelabert JoséMaría Vallejo-gil Javier fañanás-Mastral Manuel Vázquez-Sancho Javier AndréBellido-Morales Alexánder Sebastián Vaca-Núñez Carlos Ballester-Cuenca Emiliano Diez Laura Ordovás Esther Pueyo Biomedical Signal Interpretation and Computational Simulation group(BSICoS) Aragón Institute of Engineering ResearchUniversity of ZaragozaZaragoza 50018Spain BSICoS Instituto de Investigación Sanitaria Aragón(IISA)Zaragoza 50018Spain Centro Universitario de la Defensa(CUD) Zaragoza 50090Spain. Department of Cardiovascular Surgery University Hospital Miguel ServetZaragoza 50009Spain. Institute of Experimental Medicine and Biology of Cuyo(IMBECU) CONICETMendoza 5500Argentina. Fundación Agencia Aragonesa para la Investigación y el Desarrollo(ARAID) Zaragoza 50018Spain. Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine(CIBER-BBN)Zaragoza 50018Spain.

Connexin 43 (CX43) is one of the major components of gap junctions, the structures responsible for the intercellular communication and transmission of the electrical impulse in the left ventricle. There is limited information on the histological changes of CX43 with age and their effect on electrophysiology, especially in humans. Here, we analyzed left ventricular biopsies from living donors starting at midlife to characterize age-related CX43 remodeling. We assessed its quantity, degree of lateralization, and spatial heterogeneity together with fibrotic deposition. We observed no significant age-related remodeling of CX43. Only spatial heterogeneity increased slightly with age, and this increase was better explained by biological age than by chronological age. Importantly, we found that CX43 features varied considerably among individuals in our population with no relevant relationship to age or fibrosis content, in contrast to animal species. We used our experimental results to feed computational models of human ventricular electrophysiology and to assess the effects of interindividual differences in specific features of CX43 and fibrosis on conduction velocity, action potential duration, and arrhythmogenicity. We found that larger amounts of fibrosis were associated with the highest arrhythmic risk, with this risk being increased when fibrosis deposition was combined with a reduction in CX43 amount and/or with an increase in CX43 spatial heterogeneity. These mechanisms underlying high arrhythmic risk in some individuals were not associated with age in our study population. In conclusion, our data rule out CX43 remodeling as an age-related arrhythmic substrate in the population beyond midlife, but highlight its potential as a proarrhythmic factor at the individual level, especially when combined with increased fibrosis.

关键词： CX43 rhythm Independent

Emergency Care for Children and Adolescents after Sexual Violence, in Brazil’s Capital, Brasilia

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Open Journal of Epidemiology 2024年第2期14卷 397-403页

作者： Evaldo Lima Da Costa karla Simônia de Pádua Aníbal faúndes Rui Nunes Bioethics at the School of Medicine University of Porto/Federal Council of Medicine Porto Portugal Center for Research in Women’ s Reproductive Health (CEMICAMP) Center for Integral Attention to Women (CAISM) State University of Campinas Campinas Brazil Center for Research in Women’ s Reproductive Health (CEMICAMP) State University of Campinas (UNICAMP) Campinas Brazil. The Centre of Bioethics Faculty of Medicine University of Porto Porto Portugal

Objective: Sexual violence affects women of all ages but, more commonly, children and adolescents. This study aimed to identify the extent to which services are being provided at the hospitals responsible for the emergency care of children and adolescents who have suffered sexual violence and to determine whether there is any difference in the provision of such services as a function of the victim’s age. Method: This cross-sectional study investigated differences in the care received by female children and adolescents who are victims of sexual violence in a capital city, comparing the treatment given to girls under 15 with that given to adolescents of 15 to 19 years of age. The data were extracted from the State Department of Health database between 01/01/2012 and 31/12/2016. Results: Children under 15 were much less likely to receive prophylaxis against HIV, sexually transmitted infections and hepatitis B, with the number of adolescent girls treated adequately corresponding to between twice and almost three times the number of children treated prophylactically. Only 10% of girls under 15 received emergency contraception. Conclusion: The lack of standard care established by the Ministry of Health highlights the need for urgent debates both locally and probably throughout the country, as the situation may be similar in other regions of the country.

关键词： Aggressors Children Sexual Violence Teenagers

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基于数学实践进路的数学基础多元论辩护

科学技术哲学研究 2024年第4期41卷 22-28页

作者：李娜叶发扬南开大学哲学院天津300350

近年来,在数学基础的研究中,存在着集合论、范畴论和一价基础三大相互竞争的基础理论,并逐渐形成了数学基础的一元论与多元论之争。学界对相关哲学立场的辩护存在不同的进路,其中最重要的一条是数学实践进路。基于该进路,以作为数学实... 详细信息

近年来,在数学基础的研究中,存在着集合论、范畴论和一价基础三大相互竞争的基础理论,并逐渐形成了数学基础的一元论与多元论之争。学界对相关哲学立场的辩护存在不同的进路,其中最重要的一条是数学实践进路。基于该进路,以作为数学实践事实之实践对象和实践方法为依据,“自然的”数学基础多元论获得了成功辩护。但该辩护并不充分,因其面临数学实践的可靠性质疑和论据的不全面性问题。鉴此,通过表明数学实践的可靠性,并在“自然的数学基础”意义之基础上,从“数学基础”层面提供论据补充,才能真正实现对数学基础多元论的充分辩护。

关键词：数学基础数学实践集合论范畴论一价基础

弯剪耦合作用下大尺寸碳纤维C型梁失效损伤模式分析

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纺织学报 2024年第2期45卷 93-100页

作者：赵紫昱杨曈张发马丕波江南大学纺织科学与工程学院江苏无锡214122 中国商用飞机有限责任公司北京民用飞机技术研究中心北京100000

为进一步探究大尺寸碳纤维C型梁结构抗弯剪屈曲的承载性能,提出了一种可同时施加弯曲和剪切载荷并任意调节弯剪比的试验装置。通过设计3种不同弯剪耦合条件进行试验载荷的加载,使用应变片监测大尺寸碳纤维C型梁结构在屈曲以及后屈曲阶... 详细信息

为进一步探究大尺寸碳纤维C型梁结构抗弯剪屈曲的承载性能,提出了一种可同时施加弯曲和剪切载荷并任意调节弯剪比的试验装置。通过设计3种不同弯剪耦合条件进行试验载荷的加载,使用应变片监测大尺寸碳纤维C型梁结构在屈曲以及后屈曲阶段应变分布状况。通过有限元模型对基于不同损伤准则的后屈曲行为进行预测。研究结果表明:大尺寸碳纤维C型梁在抗弯和抗弯剪耦合的载荷条件下,都具有优良的后屈曲承载能力;在2种弯剪耦合条件下,试验件分别在3.28倍和2.3倍设计载荷时发生梁腹板失稳现象,试验件进入后屈曲状态,继续进行弯剪耦合载荷的加载,达到4.6倍设计载荷后,样品出现局部损伤;采用Hashin和LaRC05准则对试验件损伤情况进行预测,破坏损伤形式分别为沿45°方向开始向外扩展和上部翼缘扭曲破坏。

关键词：大尺寸C型梁弯剪耦合应变测量后屈曲损伤预测

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新质生产力与国家安全主动权的塑造

江西财经大学学报 2024年第4期 3-12页

作者：陈始发梁薇南昌大学马克思主义学院江西南昌330031 江西财经大学马克思主义学院江西南昌330013

新质生产力代表先进生产力的发展方向,直接关系塑造国家安全主动权的坚实根基、核心主体和关键支撑。新质生产力通过产业革新拓展新质劳动对象,夯实国家安全主动权的物质基础,从而推动经济社会高质量发展,成为塑造国家安全主动权的必然... 详细信息

新质生产力代表先进生产力的发展方向,直接关系塑造国家安全主动权的坚实根基、核心主体和关键支撑。新质生产力通过产业革新拓展新质劳动对象,夯实国家安全主动权的物质基础,从而推动经济社会高质量发展,成为塑造国家安全主动权的必然选择。新质生产力通过培育高素质的新质劳动者,形塑国家安全主动权核心主体的高素质人才,从而构建和谐稳定的社会环境,成为塑造国家安全主动权的内在要求。新质生产力通过科技创新生成具有高技术含量的新质劳动资料,强化国家安全主动权关键支撑的科技力量,从而突破和掌握关键核心技术,成为塑造国家安全主动权的根本途径。由此,新质生产力通过增强国家安全主动权的物质支撑、人才支撑和科技支撑,为构建更高水平的国家安全体系奠定坚实基础。

关键词：新质生产力国家安全主动权科技创新

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高校优秀运动员培养的演化博弈分析

广州体育学院学报 2024年第2期44卷 94-100页

作者：陈土发东莞城市学院通识教育学院广东东莞523419

高校作为运动员培养的重要基地之一,对优秀运动员的培养与发掘有着重要作用。本研究根据双方的行为逻辑构建演化博弈模型,模拟不同时间序列下的情景,真实动态地分析探究高校运动员与高校教育体系投入(认真)行为的关联影响程度,深入研究... 详细信息

高校作为运动员培养的重要基地之一,对优秀运动员的培养与发掘有着重要作用。本研究根据双方的行为逻辑构建演化博弈模型,模拟不同时间序列下的情景,真实动态地分析探究高校运动员与高校教育体系投入(认真)行为的关联影响程度,深入研究寻找双方行为概率的关键性因素。研究表明:高校优秀运动员培养与高校方投入成本、运动员训练投入程度、社会声誉支持等参数有直接关系。结合Matlab仿真分析,高校竞技体育产业化道路、竞赛体制改革等方式有助于优化高校优秀运动员培养机制。

关键词：优秀运动员体制改革模式优化演化博弈