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4D flow心脏MRI测量左心室血流动力学参数的可靠性

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中国医学影像技术 2024年第2期40卷 221-225页

作者：马丽荣郭家璇李文玲马丽郑琰张怀瑢朱力宁夏医科大学临床医学院宁夏银川750004 宁夏医科大学总医院放射科宁夏银川750004

目的观察基于心脏MRI(CMRI)以局部区域性4D flow及全心4D flow技术测量左心室血流动力学参数的可靠性。方法前瞻性对31名健康体健者采用心脏超声、三腔心4D flow(基于左心室流入流出道层面)及全心4D flow CMRI测量左心室血流动力学参... 详细信息

目的观察基于心脏MRI(CMRI)以局部区域性4D flow及全心4D flow技术测量左心室血流动力学参数的可靠性。方法前瞻性对31名健康体健者采用心脏超声、三腔心4D flow(基于左心室流入流出道层面)及全心4D flow CMRI测量左心室血流动力学参数,以组内相关系数(ICC)评估其所测左心室血流动力学参数的一致性。结果心脏超声与三腔心4D flow CMRI所测收缩期主动脉瓣上/瓣下峰值流速、舒张期二尖瓣E峰流速、主动脉瓣上/瓣下压力及主动脉瓣跨瓣压差的一致性均良好(ICC均>0.75),所测舒张期二尖瓣A峰流速的一致性中等(ICC为0.718);心脏超声与全心4D flow CMRI所测收缩期主动脉瓣上/瓣下峰值流速、舒张期二尖瓣A峰流速及主动脉瓣上/瓣下压力的一致性均良好(ICC均>0.75),所测舒张期二尖瓣E峰流速及主动脉瓣跨瓣压差的一致性均为中等(ICC分别为0.600及0.628);三腔心4D flow CMRI与全心4D flow CMRI测量上述指标结果的一致性均良好(ICC均>0.75)。结论基于CMRI以局部区域性4D flow与全心4D flow技术测量左心室血流动力学参数可靠,与心脏超声测量结果具有良好一致性。

关键词：心室血流动力学磁共振成像

我国科技期刊开放获取出版研究现状与趋势(2004-2023)

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出版与印刷 2024年第3期 1-10页

作者：马丽蓉许洁武汉大学信息管理学院

分析我国科技期刊开放获取出版研究的现状与趋势,为后续研究提供参考,为我国科技期刊应对开放科学浪潮提供借鉴。文章借助CiteSpace分析工具对2004-2023年发表的与我国科技期刊开放获取出版相关的304篇文献进行分析,梳理我国科技期刊开... 详细信息

分析我国科技期刊开放获取出版研究的现状与趋势,为后续研究提供参考,为我国科技期刊应对开放科学浪潮提供借鉴。文章借助CiteSpace分析工具对2004-2023年发表的与我国科技期刊开放获取出版相关的304篇文献进行分析,梳理我国科技期刊开放获取出版研究的发文量趋势、发文作者与发文机构情况、研究热点、发展趋势和研究前沿。研究发现我国科技期刊开放获取出版研究主要经历了三个阶段,分别以科技期刊建设、开放获取运动和开放科学浪潮为脉络展开;从发文作者和发文机构分布来看,当前尚未形成高产作者群,开展这一主题研究的主要是高校、科研机构和出版社;从研究热点来看,开放获取、开放科学、数字出版等逐渐成为了研究热点,预印本、产业链、人工智能等一系列新的研究主题不断被提出,未来还将衍生出新的研究方向。

关键词：科技期刊开放获取科技出版开放科学

基于4D Flow CMR技术评价心肌纤维化对肥厚型心肌病患者左室舒张功能障碍的影响

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磁共振成像 2024年第5期15卷 119-125页

作者：郑琰马丽荣郭家璇张怀榕孙潇孙凯王一帆朱力宁夏医科大学第一临床医学院银川750004 宁夏医科大学总医院放射科银川750004

目的采用四维血流(four-dimensional flow,4D Flow)心脏磁共振成像(cardiac magnetic resonance,CMR)技术对肥厚型心肌病(hypertrophic cardiomyopathy,HCM)患者是否存在左心室舒张功能障碍进行评估,探讨心肌纤维化对HCM患者左心室舒张功能的影响。材料与方法前瞻性纳入44例HCM患者,根据患者是否合并晚期钆增强(late gadolinium enhancement,LGE)分为HCM LGE(+)组(25例)和HCM LGE(-)组(19例),同期纳入31例健康对照者。三组人群进行3.0 T磁共振稳态自由进动序列及4D Flow序列扫描。采用CVI42后处理软件进行分析,包括心功能参数、二尖瓣血流速度参数。使用单因素方差分析或mann-Whitney U检验对三组受试者临床资料及影像学参数进行比较;并对二尖瓣水平舒张早期平均血流速度(E)与舒张期整体室壁峰值厚度(global peak wall thickness,GPWT)、左心室质量(left ventricular mass,LVmass)进行相关性分析。结果HCM患者的LVmass及GPWT均大于健康对照组,且伴有心肌纤维化较不伴有心肌纤维化的HCM患者的GPWT增大更加明显[HCM LGE(+)组*** LGE(-)组vs.健康对照组];[LVmass:157.34(122.24,194.38)g vs.148.29(131.79,189.83)g vs.85.73(73.00,94.02)g;GPWT:20.04(16.76,24.99)mm vs.17.46(16.19,19.99)mm vs.9.47(8.35,10.92)mm](Pmass均呈负相关(r=-0.593/r=-0.371,P<0.001/P=0.001)。结论基于4D Flow CMR不仅可以从三维角度对血流速度进行准确测量,同时能从血流动力学方面定量评估HCM患者的左室舒张功能障碍及心肌纤维化对HCM患者左心室舒张功能的影响。

关键词：肥厚型心肌病心肌纤维化左室舒张功能四维血流心脏磁共振磁共振成像

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基于LDA和ISM模型的疫苗接种意愿研究

江苏科技大学学报（自然科学版） 2024年第1期38卷 104-110页

作者：马丽荣洪小娟郑惠莉吴林海南京邮电大学管理学院南京210003 江南大学商学院无锡214122

从信息化语境中挖掘社交媒体平台中的舆情数据,尝试更加系统地分析新冠疫苗接种意愿多重影响因素间的关系.利用网络爬虫技术抓爬社交媒体Twitter平台中的数据,借助潜在狄利克雷分配(latent Dirichlet allocation,LDA)模型识别影响新冠... 详细信息

从信息化语境中挖掘社交媒体平台中的舆情数据,尝试更加系统地分析新冠疫苗接种意愿多重影响因素间的关系.利用网络爬虫技术抓爬社交媒体Twitter平台中的数据,借助潜在狄利克雷分配(latent Dirichlet allocation,LDA)模型识别影响新冠疫苗接种意愿的因素,并运用解释结构模型方法(interpretative structural modeling method,ISM)辅助建模,构建多级层次递阶结构模型,梳理和分析各项影响因素之间的逻辑层次关系.结果表明:通过LDA和ISM模型可以对获取到的因素集进行结构化处理,并根据ISM模型的逻辑结构,将影响新冠疫苗接种意愿的4个层级划分为深层、中间层和表层,不同层级对疫苗接种意愿的影响程度不同.研究结果可为提升民众对新冠疫苗的接受意愿和接种倾向提供相应的决策支持和参考价值.

关键词：新冠疫苗接种意愿潜在狄利克雷分配解释结构模型

The Nature, Characteristics & Influence of the Drastic Changes in the Middle East

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Asian Journal of Middle Eastern and Islamic Studies 2012年第2期6卷 16-48,I0002页

作者： ma lirong Middle East Studies Institute Shanghai International Studies University

The continuously evolving political turbulences and upheavals of the Arab countries can be regarded as an endogenous Arab democratic *** this evolving process,“the Islamic Elements”once again become an important source of spiritual and ideological resources for its social *** as the situation becomes more and more obvious that various factions of Islamic forces are accelerating their proceedings of“realignment”and“differentiation”,an extremely intrigue complex of interconnections is emerging between different Islamic factions and between religious politics and *** situational evolution is not only influencing the Middle East region,but also affecting the peace and development of the whole world.

关键词： Drastic Changes in Middle East Islamic Democracy Arab Democratic Movement Islamic Forces Factional Confrontations of Islam,Geopolitics

Mosque and Its Impact on the Khomeini Revolution:The Iranian Nuclear Issue Revisited

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Asian Journal of Middle Eastern and Islamic Studies 2011年第2期5卷 43-67,I0003页

作者： ma lirong Middle East Studies Institute Shanghai International Studies University

This article probes the Islamic Revolution of Iran from Khomeini’s ideas on the mosque,including his perception,adherence and upholding of Islam,so as to disclose the relevance of the mosque’s channel and Iran’s domestic and foreign policy,and then highlights the impact of the spiritual leader in ***,the international community should address the Four Kinds of Discourse that formed during the Iranian nuclear issue,which have hindered the communication and ***,the international community must expand the space and means to take effective countermeasures to create an atmosphere of communication and dialogue,and then strive to resolve the issue.

关键词： Four Kinds of Discourses Iranian Nuclear Issue Khomeini Revolution Mosques Spiritual Leader

A Cultural Analysis on Women’s Issues in Islam

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Asian Journal of Middle Eastern and Islamic Studies 2008年第1期2卷 44-58,I0004页

作者： lirong ma Institute at Shanghai International Studies University

This article gives a general survey of the mainstream spirit of Islamic views on women as well as Western media’s misperception of women in Islam,and analyzes the reason,phenomena and essence of their mutual ***,the theory of“origin and variation”is introduced as a new methodological tool to study the women’s issues in Islam in order to provide an authentic explanation.

关键词： Discourse of Western Media Women in Islam Cultural Analysis Misperception

An Empirical Analysis on the Dissimilation of Independent Audit Relationship

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Journal of Modern Accounting and Auditing 2006年第2期2卷 67-80页

作者： Guanting Chen lirong ma Tsinghua University North China Electric Power University

Under the situation where the ownership is split up, existing shareholders might occupy potential shareholders＇ interests, and similarly, controlling shareholders might occupy the interests of minority shareholders. This is called interests entrenchment effect, which leads to the dissimilation of independent audit relationship. That is to say, existing shareholders and controlling shareholders have the probabilities to utilize auditing commission to manipulate audit opinions with the purpose of interests entrenchment, which forces auditors who should be independent ＂third party＂ to become audit clients or accessories of ＂interests coupling between audit clients and auditees＂. According to the argument above, this paper proposes the owners＇ interests entrenchment hypotheses. It also proves that existing shareholders occupy potential shareholders＇ interests, and controlling shareholders occupy minority shareholders＇ interests on the basis of the data of A-share companies in Shenzhen and Shanghai Exchanges.

关键词： independent audit relationship dissimilation interests entrenchment effect

Toxicity of the disinfectant benzalkonium chloride(C_(14))towards cyanobacterium Microcystis results from its impact on the photosynthetic apparatus and cell metabolism

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Journal of Environmental Sciences 2024年第1期135卷 198-209页

作者： Yunlu Jia Yi Huang Jin ma Shangwei Zhang Jin Liu Tianli Li lirong Song Institute of Hydrobiology Chinese Academy of SciencesWuhan 430072China School of Environmental Studies China University of GeosciencesWuhan 430074China Advanced Interdisciplinary Institute of Environment and Ecology Beijing Normal UniversityZhuhai 519087China

Quaternary ammonium compounds(QACs)are commonly used in a variety of consumer and commercial products,typically as a component of *** the COVID-19 pandemic,QACs became one of the primary agents utilized to inactivate the SARS CoV-2 virus on ***,the ecotoxicological effects of QACs upon aquatic organisms have not been fully *** this study,we examined the effects of a widely used QAC(benzalkonium chloride-C_(14),BAC-14)on two toxigenic Microcystis strains and one non-toxigenic freshwater Microcystis strain and carried out an analysis focused on primary,adaptive and compensatory stress responses at apical(growth and photosynthesis)and metabolic *** analysis revealed that the two toxic Microcystis strains were more tolerant than the non-toxic strain,with 96 hr-EC_(50)values of 0.70,0.76,and 0.38 mg/L BAC-14 for toxigenic *** FACHB-905,toxigenic *** FACHB-469,and non-toxigenic *** FACHB-908,*** photosynthetic activities of the Microcystis,assessed via F_(v)/F_(m) values,were significantly suppressed under 0.4 mg/L ***,this analysis revealed that BAC-14 altered 14,12,and 8 metabolic pathways in *** FACHB-905,*** FACHB-469,and *** FACHB-908,*** is noteworthy that BAC-14 enhanced the level of extracellular microcystin production in the toxigenic Microcystis strains,although cell growth was not significantly ***,these data show that BAC-14 disrupted the physiological and metabolic status of Microcystis cells and stimulated the production and release of microcystin,which could result in damage to aquatic systems.

关键词： Disinfectants Quaternary ammonium compounds Microcystis Cyanotoxin Metabolomics Chlorophyll fluorescence