期刊文献+
共找到7,413篇文章
< 1 2 250 >
每页显示 20 50 100
On the Praxis-Oriented Semiotic Aesthetics in Eastern European Marxism
1
作者 Li Huiwen 《Contemporary Social Sciences》 2024年第1期1-17,共17页
Eastern European Marxism,taking a critical stance towards structuralism,gave rise to a unique paradigm of praxis-oriented semiotic aesthetics.This novel approach posits that signs emerge from humans’social praxis and... Eastern European Marxism,taking a critical stance towards structuralism,gave rise to a unique paradigm of praxis-oriented semiotic aesthetics.This novel approach posits that signs emerge from humans’social praxis and also function as a means of praxis.It further delves into the principle governing the generation and usage of signs,i.e.,the Economy Principle,the homogenization of signs,the situatedness or contextual constraints,as well as their aesthetic features and transcendental attributes.As a result,the praxis-oriented semiotic aesthetics within Eastern European Marxism exhibits distinct theoretical value. 展开更多
关键词 Eastern european Marxism SEMIOTICS praxis AESTHETICS
下载PDF
The Impact of Big Five Personality Traits on Older Europeans’ Physical Health
2
作者 Eleni Serafetinidou Christina Parpoula 《Journal of Biomedical Science and Engineering》 2024年第2期41-56,共16页
Investigating the role of Big Five personality traits in relation to various health outcomes has been extensively studied. The impact of “Big Five” on physical health is here explored for older Europeans with a focu... Investigating the role of Big Five personality traits in relation to various health outcomes has been extensively studied. The impact of “Big Five” on physical health is here explored for older Europeans with a focus on examining age groups differences. The study sample included 378,500 respondents derived from the seventh data wave of Survey of Health, Aging and Retirement in Europe (SHARE). The physical health status of older Europeans was estimated by constructing an index considering the combined effect of well-established health indicators such as the number of chronic diseases, mobility limitations, limitations with basic and instrumental activities of daily living, and self-perceived health. This index was used for an overall physical health assessment, for which the higher the score for an individual, the worst health level. Then, through a dichotomization process applied to the retrieved Principal Component Analysis scores, a two-group discrimination (good or bad health status) of SHARE participants was obtained as regards their physical health condition, allowing for further con-structing logistic regression models to assess the predictive significance of “Big Five” and their protective role for physical health. Results showed that neuroti-cism was the most significant predictor of physical health for all age groups un-der consideration, while extraversion, agreeableness and openness were not found to significantly affect the self-reported physical health levels of midlife adults aged 50 up to 64. Older adults aged 65 up to 79 were more prone to open-ness, whereas the oldest old individuals aged 80 up to 105 were mainly affected by openness and conscientiousness. . 展开更多
关键词 Big Five Personality Traits Physical Health Older europeans SHARE Principal Component Analysis
下载PDF
The European Cup Has Limited Effect to “Save” Europe
3
作者 Li Si 《China's Foreign Trade》 2024年第4期52-53,共2页
On June 15th,the one-month European Football Championship(hereinafter referred to as the European Cup)kicked off in Germany.In 2023,Germany’s GDP shrank by 0.3%,which was the worst performance among the world’s majo... On June 15th,the one-month European Football Championship(hereinafter referred to as the European Cup)kicked off in Germany.In 2023,Germany’s GDP shrank by 0.3%,which was the worst performance among the world’s major economies.This year,Germany is pinning its hopes on the European Championship to stimulate consumption and boost the economy. 展开更多
关键词 european CUP BOOST
下载PDF
Potential of the Arkhangelsk seismic network for European Arctic monitoring
4
作者 Galina Antonovskaya Yana Konechnaya +2 位作者 Ekaterina Morozova Yana Mikhailova Eugenia Shakhova 《Earthquake Science》 2024年第5期434-444,共11页
The Arkhangelsk Seismic Network(ASN)of the N.Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences,founded in 2003,includes 10 permanent seismic stations located o... The Arkhangelsk Seismic Network(ASN)of the N.Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences,founded in 2003,includes 10 permanent seismic stations located on the coasts of the White,Barents,and Kara Seas and on the Arctic archipelagos of Novaya Zemlya,Franz Josef Land,and Severnaya Zemlya.The network is registered with the International Federation of Digital Seismograph Networks and the International Seismological Center.We used not only ASN data to process earthquakes but also the waveforms of various international seismic stations.The 13,000 seismic events were registered using ASN data for 2012-2022,and for 5,500 of them,we determined the parameters of the earthquake epicenters from the European Arctic.The spatial distribution of epicenters shows that the ASN monitors not only the main seismically active zones but also weak seismicity on the shelf of the Barents and Kara Seas.The representative magnitude of ASN was ML,rep=3.5.The level of microseismic noise has seasonal variations that affect the registration capabilities of each station included in the ASN and the overall sensitivity of the network as a whole.In summer,the sensitivity of the ASN decreased owing to the increasing microseismic and ambient noises,whereas in winter,the sensitivity of the ASN increased significantly because of the decrease. 展开更多
关键词 european Arctic Arkhangelsk Seismic Network seismic monitoring seismic network registration capabilities
下载PDF
The launch of European technical committee on carbon capture, utilization and storage
5
《China Standardization》 2024年第2期65-65,共1页
The Dutch Standardization Institute(NEN) has initiated the establishment of a European technical committee(CEN/TC 474) that will develop European Standards across the CCUS(carbon capture, utilization and storage) valu... The Dutch Standardization Institute(NEN) has initiated the establishment of a European technical committee(CEN/TC 474) that will develop European Standards across the CCUS(carbon capture, utilization and storage) value chain. With broad participation from CEN Members and European organizations, the committee kicked off in Brussels and finalized its scope and first work programme. 展开更多
关键词 european COMMITTEE DUTCH
下载PDF
Cardiovascular diseases in European ethnic minorities: Beyond the traditional cardiovascular risk factors
6
作者 Mohamed Bamoshmoosh 《World Journal of Cardiology》 2024年第3期98-103,共6页
This editorial is intended to be a reflection on cardiovascular disease(CVD)burden in European ethnic minorities.In some European countries,ethnic minority realities,due to their recent appearance,are still to be stud... This editorial is intended to be a reflection on cardiovascular disease(CVD)burden in European ethnic minorities.In some European countries,ethnic minority realities,due to their recent appearance,are still to be studied in depth.The experience of several European countries,where the migration processes started earlier,even more than a century ago,can help by being an example.Many studies have shown that major differences in CVD burden exist not only between countries,but also within the same country when considering different social strata and ethnic groups.The CV risk factors underlying heart disease have been well established.Important epidemiological studies have helped us understand that the underlying causes of heart disease as well as the behaviors that can help prevent them are the same.We are now well aware that CVD should be treated by considering a holistic approach.This is why the social determinants(SDs)of health that may worsen the disease burden or that,vice versa,may improve the treatment,and even more significantly,the prognosis of a patient’s illness should be taken into consideration.For ethnic minority patients,this holistic,hermeneutic approach is of importance.Several SDs of health that influence CVDs have been identified but their relevance for the health of ethnic minorities has not yet been clearly defined.In some European countries,most ethnic minorities are largely also religious minorities.Only a few studies have evaluated the role of religion,which is an important SD that affects the probability of having CV risk factors and diseases.Adolescents,particularly those belonging to the second generation,seem to be the weak link.If we believe that these young people are really citizens of their country of birth,then a way of recognizing their belonging to the community starts from a will to better understand their condition,in order to assist them while they grow physically and mentally.Thinking about safeguarding the health of this population should be more than a health task,rather a goal of social justice. 展开更多
关键词 Cardiovascular diseases Cardiovascular risk factors european ethnic minorities Social determinants of health
下载PDF
Seminars on European Harmonized Standards
7
《China Standardization》 2024年第3期60-60,共1页
European standards and technical specifications promote inter-operability,the safety of EU citizens and the protection of the environment,increasing consumer confidence.To contribute to improving the quality of Europe... European standards and technical specifications promote inter-operability,the safety of EU citizens and the protection of the environment,increasing consumer confidence.To contribute to improving the quality of European standards,CEN and CENELEC,with the support of the European Commission and the European Free Trade Association(EFTA),are organizing seminars dedicated to supporting standards drafters. 展开更多
关键词 european SEMINAR SUPPORTING
下载PDF
Predicaments and Prospects of European Social Democracy Amidst Multiple Crises
8
作者 Yang Xiepu 《Contemporary World》 2024年第3期35-38,共4页
The global financial crisis,the refugee crisis,the COVID-19 pandemic and the Ukraine crisis have been compounded with one another,bringing a heavy blow to European economy and society.Meanwhile,center-left parties in ... The global financial crisis,the refugee crisis,the COVID-19 pandemic and the Ukraine crisis have been compounded with one another,bringing a heavy blow to European economy and society.Meanwhile,center-left parties in most of the European countries are suffering severe electoral setbacks with a steep decline in public support for various reasons.European social democracy is obviously losing its way and how to break the current predicaments becomes its highest priority. 展开更多
关键词 bringing european PARTIES
下载PDF
China National Traditional Orchestra Make the European Tour Performance Successfully
9
作者 Yi Daping 《China & The World Cultural Exchange》 2024年第3期15-17,共3页
During the Chinese New Year in 2024,China National Traditional Orchestra,led by President Zhao Cong and Deputy President Tang Feng,held the Chinese New Year tour concert in Europe,performing 9 concerts in9citiesin6cou... During the Chinese New Year in 2024,China National Traditional Orchestra,led by President Zhao Cong and Deputy President Tang Feng,held the Chinese New Year tour concert in Europe,performing 9 concerts in9citiesin6countries including France,Austria,Germany,Poland,Hungary and Serbia.At the same time,Chinese embassies and consulates in many Europeancountriesjointly launched a series of folk music and traditional culturepromotionand communication activities,deeply integrated into the overall national cultural diplomacy,and composed a new chapter of cultural integration and mutual learning betweenChinaand European people. 展开更多
关键词 jointly european mutual
下载PDF
How Marie Sklodowska-Curie Doctoral Networks Can Support European Refractory Ecosystem in Context of The European Green Deal
10
作者 Marc HUGER Glyn DERRICK +4 位作者 Mossaab MOUIYA Andrea SALERNO Kwasi Addo BOATENG Hrikeshava RANGANATHAN Amit Kumar GOPE 《China's Refractories》 CAS 2024年第2期1-9,共9页
The movement of the Iron&Steelmaking(I&S)industry towards Net-Zero emissions and digitalized processes through disruptive,breakthrough technologies will be achieved through the use of Hydrogen.The biggest chal... The movement of the Iron&Steelmaking(I&S)industry towards Net-Zero emissions and digitalized processes through disruptive,breakthrough technologies will be achieved through the use of Hydrogen.The biggest challenge for the refractory industry is to continue to meet the performance expectations while,at the same time,moving to a more sustainable production direction.The complexity and urgency of these technological changes,highlighted by the European Green Deal,requires ambitious,international,interdisciplinary and intersectoral projects,bringing together institutes from across the global value chain,to carry out cutting edge research.The European Union,through its flagship doctoral training program,MSCA,has,and continues to support research and development as well as the promotion of the refractory industry in Europe.An introduction to two MSCA projects and some of the results achieved are highlighted within this article. 展开更多
关键词 FIRE network Horizon 2020 Horizon Europe Marie Sklodowska-Curie Actions Doctoral networks european Green Deal
下载PDF
European Radiology科学论著摘要(2024年3月、4月杂志)
11
《国际医学放射学杂志》 2024年第3期371-380,共10页
摘要目的旨在评估侧支图预测急性前循环缺血性脑卒中后病变进展和缺血半暗带的能力。方法从前瞻性收集的数据库中选定数据进行回顾性分析。基于扩散加权成像(DWI)测算病变进展比,即随访病变体积与基线病变体积的比值。达峰时间(Tmax)/DW... 摘要目的旨在评估侧支图预测急性前循环缺血性脑卒中后病变进展和缺血半暗带的能力。方法从前瞻性收集的数据库中选定数据进行回顾性分析。基于扩散加权成像(DWI)测算病变进展比,即随访病变体积与基线病变体积的比值。达峰时间(Tmax)/DWI比值为病变在基线Tmax>6 s的体积与DWI基线体积的比值。侧支比在随访期相与基线期相上测量,即侧支图中低灌注区在2个期相上最接近DWI病变的体积比值。 展开更多
关键词 缺血半暗带 病变进展 急性前循环缺血性脑卒中 european 达峰时间 低灌注区 基线 DWI
下载PDF
Tax avoidance and earnings management:a neural network approach for the largest European economies
12
作者 Francisco J.Delgado Elena Fernández‑Rodríguez +2 位作者 Roberto García‑Fernández Manuel Landajo Antonio Martínez‑Arias 《Financial Innovation》 2023年第1期558-582,共25页
In this study,we investigate the relationship between tax avoidance and earnings management in the largest five European Union economies by using artificial neural network regressions.This methodology allows us to dea... In this study,we investigate the relationship between tax avoidance and earnings management in the largest five European Union economies by using artificial neural network regressions.This methodology allows us to deal with nonlinearities detected in the data,which is the principal contribution to the previous literature.We ana-lyzed Compustat data for Germany,the United Kingdom,France,Italy,and Spain for the 2006–2015 period,focusing on discretionary accruals.We considered three tax avoidance measures,two based on the effective tax rate(ETR)and one on book-tax differences(BTD).Our results indicate the presence of nonlinear patterns and a posi-tive,statistically significant relationship between discretionary accruals and both ETR indicators implying that when companies resort to earnings management,a larger tax-able income—and thus higher ETR and lesser tax avoidance–would ensue.Hence,as also highlighted by the fact that discretionary accruals do not appear to affect BTD,our evidence does not suggest that companies are exploiting tax manipulation to reduce their tax payments;thus,the gap between accounting and taxation seems largely unaf-fected by earnings management. 展开更多
关键词 Tax avoidance Earnings management Artificial neural networks european Union
下载PDF
European Energy Crisis and China's Strategy
13
作者 Yu Zihan Hu Gusong 《China Oil & Gas》 CAS 2023年第6期68-74,共7页
Energy is an important cornerstone for the development of human society and is crucial for the development of a country’s economy and society.In the past decades,European countries have been dependent on Russian gas ... Energy is an important cornerstone for the development of human society and is crucial for the development of a country’s economy and society.In the past decades,European countries have been dependent on Russian gas imports to meet their energy needs.However,changes in the international energy geopolitical landscape and adjustments in Russia’s energy policy,coupled with U.S.and Western sanctions against Russia and Russian counter-sanctions due to the Ukraine crisis,have further complicated the already severe energy supply and demand situation in Europe,leading to increased energy supply uncertainty and sharp increases in energy prices in several European countries,especially in natural gas energy.Energy uncertainty and risks have turned into a serious energy crisis.The European energy crisis not only has a direct impact on the economic and social development of European countries,but also greatly affects the global energy supply and demand pattern,global economic trade and industrial chain and supply chain security.A deep understanding of the causes of the European energy crisis and the strategies and measures taken by European countries to cope with the energy crisis has important implications for us to avoid energy risks. 展开更多
关键词 european CORNERS LANDSCAPE
下载PDF
Delivering Tram-Based Boulevards: Learning from Opportunities and Challenges in Three European City Case Studies
14
作者 Jan Scheurer Marie Verschuer +1 位作者 Peter Newman Cheryl Desha 《Journal of Transportation Technologies》 2023年第2期262-281,共20页
Increasing calls for zero-carbon cities invite transformative solutions for people and places within our cities around the world. Key to the transformation is cities and regions shifting in mobility away from fossil-f... Increasing calls for zero-carbon cities invite transformative solutions for people and places within our cities around the world. Key to the transformation is cities and regions shifting in mobility away from fossil-fuel based car-oriented solutions. The paper investigates a range of case studies where “tram-based boulevards” have been planned or implemented to provide such opportunities. The case studies share a common broader policy objective: to transform the car-oriented or car-saturated areas to an intensified urban template based on a critical presence of dedicated mid-tier transit infrastructure and active transport. “Trams”, or mid-tier, mid-capacity transit when combined with Transit oriented development (TOD) along whole corridors can provide transformative pathways towards zero-carbon outcomes as well as multiple, strong urban benefits. However, many successful or instructive examples of this practice from non-English speaking countries, particularly in Europe, are underdocumented in the international literature. The paper addresses this gap by investigating opportunities and challenges evident in a range of European case studies. These are explored for insight towards policy learning particularly in New World cities seeking to transform into a zero-carbon and more transit-oriented template: How can decision-makers avoid repeating the identified pitfalls, and instead focus on emulating the successful approaches and outcomes? We conclude the need for recognition of the inherent synergies between transport and land use settings in any endeavour, and their translation into policy priorities in both fields of planning. We also conclude the importance of decision makers proactively identifying and critically appraising specific opportunities for change, concerning funding, technology, public opinion, stakeholder alliances or market dynamics, and capitalising on them at suitable moments in time. 展开更多
关键词 Transit Oriented Development (TOD) Transit Activated Corridors (TAC) Zero-Carbon Cities Transit Diversity Urban Corridor Intensification Trams Boulevards european Case Studies
下载PDF
Open banking and inclusive finance in the European Union:perspectives from the Dutch stakeholder ecosystem
15
作者 Massimo Preziuso Franziska Koefer Michel Ehrenhard 《Financial Innovation》 2023年第1期2752-2778,共27页
In the European Union(EU),the revised Payment Services Directive(PSD2)aims to provide more convenient and customized financial products through open banking(OB)platforms.However,little attention has been paid to the r... In the European Union(EU),the revised Payment Services Directive(PSD2)aims to provide more convenient and customized financial products through open banking(OB)platforms.However,little attention has been paid to the role of OB in improving the financial well-being of the growing number of the EU’s underserved groups,which currently constitute approximately a quarter of its population.This study examines how the PSD2 and OB impact inclusive finance in the EU based on the perspectives of the Netherlands’ecosystem,one of the leaders in the EU’s financial technology(FinTech)landscape.A fundamental distinction can be drawn between the OB users and the ecosystem’s players.Regarding the impact of financial services on the users’inclusivity,while the PSD2 strengthens the infrastructure necessary for financial inclusion,many challenges remain,mainly because it was not designed for this purpose.This study identifies several areas of improvement that include adjustments to the know your customer and anti-money laundering processes for underserved customers,innovative ways to communicate the PSD2’s potential,and the regulation of technology providers’activities to build trust.Meanwhile,from the ecosystem’s position,there is a need to strengthen and improve microfinance regulation according to the opportunities provided by the PSD2 to support microfinance institutions(MFIs)in scaling up and reaching underserved clients across borders with innovative services.OB improvements can also be achieved by organizations formed by MFIs and FinTechs in collaboration with banks.Such hybrid institutions will combine the best features of each of them:knowledge of the needs of local underserved clients from MFIs,technological innovations from FinTechs,and large and trusted customer bases,infrastructures,and access to institutional investments and governments from banks.Finally,an EU inclusive OB sector depends on the centrality of trusted regulators as coordination bodies.The PSD2 requires adjustments for underserved populations’specific needs.OB improvements can be achieved by organizations formed by MFIs and Fin-Techs in collaboration with banks.Regulated technical service providers(TSPs)are crucial to building trust and customer adoption in OB.The European Banking Authority(EBA)may function as coordination body to design inclusive rules by engaging with OB stakeholders.As inclusive finance moves into open-finance and data eras,an increasing regulatory complexity and scope will require networks of innovative and trusted regulators. 展开更多
关键词 The Revised Payment Services Directive(PSD2) Open banking Inclusive finance ECOSYSTEMS FinTech The Netherlands The european Union
下载PDF
欧洲温室型黄瓜种质资源主要农艺性状遗传多样性分析 被引量:1
16
作者 曹守军 姚建刚 +7 位作者 张丽莉 王虹云 张瑞清 张安平 范燕山 韩丽 李涛 张英勇 《中国瓜菜》 CAS 北大核心 2024年第4期56-62,共7页
为了研究欧洲温室型黄瓜农艺性状遗传多样性、亲缘关系,明确种质资源的特征特性,为欧洲温室型黄瓜新品种选育提供参考,对搜集并纯化的41份欧洲温室型黄瓜自交系进行了第一雌花节位、叶长、叶宽等18个农艺性状鉴定,并进行遗传多样性、相... 为了研究欧洲温室型黄瓜农艺性状遗传多样性、亲缘关系,明确种质资源的特征特性,为欧洲温室型黄瓜新品种选育提供参考,对搜集并纯化的41份欧洲温室型黄瓜自交系进行了第一雌花节位、叶长、叶宽等18个农艺性状鉴定,并进行遗传多样性、相关性和聚类分析。18个农艺性状间变异系数在13.36%~76.48%之间,变异系数最大的性状为第一雌花节位,达到76.48%;变异系数最小的性状为植株生长势,为13.36%、平均变异系数为27.78%。单瓜质量和单株产量均与第一雌花节位呈显著正相关;果皮颜色与果皮硬度呈显著正相关,与心腔比呈极显著负相关。在遗传相似系数(GS)为1.86时,分为三大类,第一类含有23份黄瓜种质资源,占供试材料的56%;第二类含有4份黄瓜种质资源;第三类含有14份黄瓜种质资源。41份欧洲温室型黄瓜材料遗传差异较大,有丰富的遗传多样性,具有较大的育种目标选择潜力,为欧洲温室型黄瓜新品种选育提供了优良资源。 展开更多
关键词 黄瓜 欧洲温室型 多样性分析 相关性分析 聚类分析
下载PDF
欧洲呼吸协会2022版《急性呼吸衰竭患者经鼻高流量氧疗临床实践指南》解读 被引量:5
17
作者 金静芬 丁传琦 +3 位作者 徐剑锋 成守珍 楼剑 黄添诧 《中华急危重症护理杂志》 CSCD 2024年第2期142-146,共5页
欧洲呼吸协会于2022年发布了《急性呼吸衰竭患者经鼻高流量氧疗临床实践指南》,该指南旨在为急性低氧性呼吸衰竭、手术患者术后拔管、非手术患者拔管以及高碳酸血症型呼吸衰竭4种情境下的氧疗管理提供指导。涵盖了8个主题,下设相应的推... 欧洲呼吸协会于2022年发布了《急性呼吸衰竭患者经鼻高流量氧疗临床实践指南》,该指南旨在为急性低氧性呼吸衰竭、手术患者术后拔管、非手术患者拔管以及高碳酸血症型呼吸衰竭4种情境下的氧疗管理提供指导。涵盖了8个主题,下设相应的推荐意见。尽管该指南的制订方法规范严谨,但需要指出的是,现有的临床证据质量等级并不高,尚需更多研究来进一步支持这些推荐意见的有效性。尽管如此,这份指南仍可帮助急诊医护人员更好地开展急性呼吸衰竭患者的氧疗实践。 展开更多
关键词 急性呼吸衰竭 经鼻高流量氧疗 指南 解读 欧洲呼吸协会
下载PDF
全民数字素养框架制定方法研究——欧盟公民数字能力框架的经验与启示 被引量:4
18
作者 陈颖仪 《图书馆》 CSSCI 2024年第1期65-72,共8页
欧盟公民数字能力框架经过十余年理论与实证相结合的发展和完善,已在国际上获得广泛认可,其制定方法和经验值得我国参考和借鉴。文章以欧盟公民数字能力框架为例,梳理其社会背景和发展过程,分析其概念映射、案例研究、专家征询、涉众咨... 欧盟公民数字能力框架经过十余年理论与实证相结合的发展和完善,已在国际上获得广泛认可,其制定方法和经验值得我国参考和借鉴。文章以欧盟公民数字能力框架为例,梳理其社会背景和发展过程,分析其概念映射、案例研究、专家征询、涉众咨询、持续更新和衍生研究等阶段的研究方法,并从顶层设计、方法体系、多元协同和统筹布局等方面探讨其经验与启示,以期为构建符合中国国情又面向未来发展需求的本土数字素养框架提供思路和参考。 展开更多
关键词 数字素养 框架 制定方法 数字能力 欧盟
下载PDF
Credit Card Fraud Detection on Original European Credit Card Holder Dataset Using Ensemble Machine Learning Technique
19
作者 Yih Bing Chu Zhi Min Lim +3 位作者 Bryan Keane Ping Hao Kong Ahmed Rafat Elkilany Osama Hisham Abusetta 《Journal of Cyber Security》 2023年第1期33-46,共14页
The proliferation of digital payment methods facilitated by various online platforms and applications has led to a surge in financial fraud,particularly in credit card transactions.Advanced technologies such as machin... The proliferation of digital payment methods facilitated by various online platforms and applications has led to a surge in financial fraud,particularly in credit card transactions.Advanced technologies such as machine learning have been widely employed to enhance the early detection and prevention of losses arising frompotentially fraudulent activities.However,a prevalent approach in existing literature involves the use of extensive data sampling and feature selection algorithms as a precursor to subsequent investigations.While sampling techniques can significantly reduce computational time,the resulting dataset relies on generated data and the accuracy of the pre-processing machine learning models employed.Such datasets often lack true representativeness of realworld data,potentially introducing secondary issues that affect the precision of the results.For instance,undersampling may result in the loss of critical information,while over-sampling can lead to overfitting machine learning models.In this paper,we proposed a classification study of credit card fraud using fundamental machine learning models without the application of any sampling techniques on all the features present in the original dataset.The results indicate that Support Vector Machine(SVM)consistently achieves classification performance exceeding 90%across various evaluation metrics.This discovery serves as a valuable reference for future research,encouraging comparative studies on original dataset without the reliance on sampling techniques.Furthermore,we explore hybrid machine learning techniques,such as ensemble learning constructed based on SVM,K-Nearest Neighbor(KNN)and decision tree,highlighting their potential advancements in the field.The study demonstrates that the proposed machine learning models yield promising results,suggesting that pre-processing the dataset with sampling algorithm or additional machine learning technique may not always be necessary.This research contributes to the field of credit card fraud detection by emphasizing the potential of employing machine learning models directly on original datasets,thereby simplifying the workflow and potentially improving the accuracy and efficiency of fraud detection systems. 展开更多
关键词 Machine learning credit card fraud ensemble learning non-sampled dataset hybrid AI models european credit card holder
下载PDF
External validation of the Moroccan Arabic version of the European Organization for Research and Treatment of Cancer colorectal(CR29)module:Monocentric study
20
作者 Houda Bachri Hajar Essangri +4 位作者 Nezha El Bahaoui Amine Benkabbou Raouf Mohsine Anass Mohammed Majbar Amine Souadka 《World Journal of Methodology》 2023年第4期259-271,共13页
BACKGROUND Quality of life(QoL)outcomes are a focal endpoint of cancer treatment strategies.AIM To externally validate the Moroccan Arabic version of the European Organization for Research and Treatment of Cancer(EORT... BACKGROUND Quality of life(QoL)outcomes are a focal endpoint of cancer treatment strategies.AIM To externally validate the Moroccan Arabic version of the European Organization for Research and Treatment of Cancer(EORTC)QoL Questionnaire(QLQ)for colorectal cancer(CRC)patients(CR29).METHODS Both Moroccan Arabic modules of QLQ-CR29 and QLQ-C30 were administered to Moroccan CRC.Psychometric properties were retested by measuring Cronbach’s alpha coefficient for reliability and Intraclass correlation coefficient(ICC)to examine test-retest reproducibility.The multitrait-scaling analysis was performed to demonstrate the validity of the instrument and known-groups comparison was used to test the score’s ability to discriminate between different groups of patients.RESULTS In total,221 patients were included in our study and 34 patients completed the questionnaire twice.The Urinary Frequency scale and Stool Frequency scale had good internal consistency with alpha Cronbach coefficients of 0.79 and 0.83 respectively,while the same coefficients were moderately lower for the Blood and Mucus in Stool scale(0.61)and the Body Image scale(0.67).The ICCs ranged from 0.88 to 1 indicating good to excellent reproducibility.In multitrait scaling analyses,the criterion for item convergent and divergent validity was satisfactory.The known-group comparison showed statistically significant differences between patients according to age,gender,stoma status,tumor location,and radiotherapy.CONCLUSION The Moroccan Arabic version of the EORTC QLQ-CR29 is a valid and reliable tool that can be used safely for research and clinical purposes in Moroccan CRC patients. 展开更多
关键词 Rectal neoplasm Colorectal cancer Health-related quality of life Patient reported outcome measures european Organization for Research and Treatment of Cancer Quality of Life Questionnaire-CR29 european Organization for Research and Treatment of Cancer Quality of Life Questionnaire-C30
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部