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Applying Machine Learning Techniques for Religious Extremism Detection on Online User Contents
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作者 Shynar Mussiraliyeva Batyrkhan Omarov +1 位作者 Paul Yoo Milana Bolatbek 《Computers, Materials & Continua》 SCIE EI 2022年第1期915-934,共20页
In this research paper,we propose a corpus for the task of detecting religious extremism in social networks and open sources and compare various machine learning algorithms for the binary classification problem using ... In this research paper,we propose a corpus for the task of detecting religious extremism in social networks and open sources and compare various machine learning algorithms for the binary classification problem using a previously created corpus,thereby checking whether it is possible to detect extremist messages in the Kazakh language.To do this,the authors trained models using six classic machine-learning algorithms such as Support Vector Machine,Decision Tree,Random Forest,K Nearest Neighbors,Naive Bayes,and Logistic Regression.To increase the accuracy of detecting extremist texts,we used various characteristics such as Statistical Features,TF-IDF,POS,LIWC,and applied oversampling and undersampling techniques to handle imbalanced data.As a result,we achieved 98%accuracy in detecting religious extremism in Kazakh texts for the collected dataset.Testing the developed machine learningmodels in various databases that are often found in everyday life“Jokes”,“News”,“Toxic content”,“Spam”,“Advertising”has also shown high rates of extremism detection. 展开更多
关键词 extremism religious extremism machine learning social media social network natural language processing NLP
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On Uzbekistan's Experience Countering Religious Extremism and Terrorism
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作者 Mirgiyos Azimov 《Contemporary International Relations》 2017年第5期150-154,共5页
Since the first years of independence,Uzbekistan began to develop and implement a policy of countering religious extremism and addressing the ideological basis of terrorism.Taking into consideration the complexity of ... Since the first years of independence,Uzbekistan began to develop and implement a policy of countering religious extremism and addressing the ideological basis of terrorism.Taking into consideration the complexity of this problem,Uzbekistan is comprehensively combating expressions of extremism and terrorism. 展开更多
关键词 Uzbekistan experience religious extremism TERRORISM
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Living in Neoliberal America:Extremism,Pauperization,and Negative Solidarity
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作者 Barbara Franz 《International Relations and Diplomacy》 2021年第12期501-514,共14页
This paper illuminates some of the main effects that neoliberalism has on the psychological and socio-economic profile of Americans.It outlines the structural processes that produced the groundwork for today’s enormo... This paper illuminates some of the main effects that neoliberalism has on the psychological and socio-economic profile of Americans.It outlines the structural processes that produced the groundwork for today’s enormous popularity of right-wing extremism in the USA.America’s middle-class has turned right-wing extremist during the Trump years and this trend has continued to dominate American politics today.While populism mobilizes feelings of injustice and grievances,the source and commencement of these grievances is the centerpiece of this article.The paper does so by applying Rodrigo Nunes’(2020a)analysis of the effects of Bolsenarismo in Brazil to the American society.The paper differentiates between the effects of individualism,punitivism,and the valorization of order above the law and shows how these trends have influenced preponderant identity traits of Baby Boomers and Generation X.Secondly,the paper focuses on the concept of“negative solidarity”which is one direct consequence of the worldview produced by successful indoctrination of neoliberal values and goes hand in hand with the consequent pauperization of the American worker.The preponderance of negative solidarity remains a key handicap for a democratic future and for any social mobilization efforts within the USA. 展开更多
关键词 neoliberalism right-wing extremism USA PAUPERIZATION negative solidarity
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The Fight Against Terrorism and Extremism and Human Rights Protection in Xinjiang
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作者 《The Journal of Human Rights》 2019年第3期365-383,共19页
March 2019 Contents Foreword I.Xinjiang Has Long Been an Inseparable Part of Chinese Territory II.The Origin of Terrorism and Extremism in Xinjiang III.Violent Terrorism and Religious Extremism Are Grave Abuses of Hum... March 2019 Contents Foreword I.Xinjiang Has Long Been an Inseparable Part of Chinese Territory II.The Origin of Terrorism and Extremism in Xinjiang III.Violent Terrorism and Religious Extremism Are Grave Abuses of Human Rights IV.Striking at Terrorism and Extremism in Accordance with the Law V.Giving Top Priority to a Preventive Counterterrorism Approach VI.Finding Experience for Counterterrorism and De-radicalization VII. 展开更多
关键词 China The FIGHT AGAINST TERRORISM and extremism Human RIGHTS Protection in XINJIANG
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Prevention of Violent Extremism and Human Rights Protection
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作者 张晓玲 李思 LIU Yan 《The Journal of Human Rights》 2017年第2期135-148,共14页
In the context of globalization, violent extremist forces pose a serious threat to the fundamental human rights of the people all over the world. Strengthening human rights protection requires reinforcing the momentum... In the context of globalization, violent extremist forces pose a serious threat to the fundamental human rights of the people all over the world. Strengthening human rights protection requires reinforcing the momentum to crack down and prevent the violent acts of extremist forces. As one of the countries that is the victim of violence by extremists, China has taken a series of measures to tackle the challenges of violent extremism. As President Xi Jinping has pointed out, 'the realization of the full enjoyment of human rights by human beings is the common goal of human society.' While establishing a community of common destiny for all mankind, the international community should take action to effectively address the root causes of violent extremism, maintain a peaceful and secure development environment, and defend the basic human rights and well-being of all peoples, so as to ensure a safe and brighter future for all. 展开更多
关键词 violent extremism human rights protection a community of common destiny for all mankind
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Oppose Religious Extremism and Guarantee Human Rights
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作者 YE XIAOWEN 《The Journal of Human Rights》 2014年第6期14-15,共2页
For today's human rights protection, it is requisite to firmly oppose religious ex- tremism, no matter whether in China or worldwide. Religious extremism is a rather serious phenomenon in the political life of today... For today's human rights protection, it is requisite to firmly oppose religious ex- tremism, no matter whether in China or worldwide. Religious extremism is a rather serious phenomenon in the political life of today's world. In the form of religion (including banners, words, symbols and costumes, etc), it agitates for the extreme claims and fanatical behavior of certain groups and damages social stability, so that it can serve its villainous purposes. 展开更多
关键词 Oppose Religious extremism and Guarantee Human Rights
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The De-Extremism Strategy of Egypt’s Sisi Government and Its Practice
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作者 Rawya Gamil Jun Zhao 《Asian Journal of Middle Eastern and Islamic Studies》 2023年第2期170-189,共20页
After the collapse of the Mubarak regime,the activities of Islamic extremism organisations in Egypt have been frequent,which brought great challenges to national security and social stability.After Sisi came into powe... After the collapse of the Mubarak regime,the activities of Islamic extremism organisations in Egypt have been frequent,which brought great challenges to national security and social stability.After Sisi came into power,the Egyptian government took various measures to actively promote the de-extremism work,however,the difficulties in the process of Egypt’s de-extremism cannot be ignored.Whether the transition of de-extremism from a movement to a institution can be realised will be the key to its longterm effect. 展开更多
关键词 Sisi regime Islamic extremism organisations de-extremism counterterrorism
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Preventing and Countering Violent Extremism Through Education:A Vital Element for the Peace Process in the Gulf
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作者 Shivali Lawale 《Asian Journal of Middle Eastern and Islamic Studies》 2020年第1期98-120,共23页
While the fall of Raqqa signalled the steady decline and“defeat”of the Islamic State(IS),it did not guarantee the end of its ideology of violent extremism.The possibility of the organisation reinventing itself in di... While the fall of Raqqa signalled the steady decline and“defeat”of the Islamic State(IS),it did not guarantee the end of its ideology of violent extremism.The possibility of the organisation reinventing itself in different and perhaps more lethal ways is very high.States,therefore,must adopt measures that are based on holistic,multi-stakeholder approaches rather than on military and securitised responses to counter and ultimately prevent the spread of violent extremist ideology.The countries of the Gulf have the advantage of a“youth bulge,”with almost half its population under the age of 30 years.This“youth bulge”is however a double-edged sword.This large pool of human capital could be a demographic dividend,if harnessed intelligently,while conversely it could prove to be a demographic disaster if timely and plausible solutions to the various issues faced are not provided.This paper will explore ways in which preventing and countering violent extremism(P/CVE)through education could be achieved by including a variety of stakeholders from faith based organisations,the corporate sector,media and academia in the formulation of appropriate educational responses which take into account issues like culture,identity and religiosity.These re-education programmes should form an integral part of P/CVE policies,thereby providing the much needed psycho-social angle to an otherwise hard security-driven discourse.It is against this rationale that this paper makes a case for P/CVE through education,encompassing the formal,informal and non-formal levels,as one of the possible means for promoting and fostering a peace process in the Gulf. 展开更多
关键词 Violent extremism Preventing and Countering Violent extremism-P/CVE EDUCATION YOUTH demographic challenges
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Analysis of the Social Ideological Roots of the Formation of Islamic Extremism
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作者 Wu Yungui 《世界宗教文化》 CSSCI 北大核心 2015年第3期158-158,共1页
Islam is a religion that advocates peace and development. But in today's world, it has become aphenomenon that some people engage terrorist activities violating human nature under the guiseof the name of Islam, wh... Islam is a religion that advocates peace and development. But in today's world, it has become aphenomenon that some people engage terrorist activities violating human nature under the guiseof the name of Islam, which is repeatedly emerging and getting worse. A large number of factsprove that religious extremism is one of the important ideological basis of violent terrorism, anddomestic politics, geopolitics, world politics especially the international intervention dominatedby begemony are very important driving forces in the formation of religious extremism. Basedon previous studies, this paper makes more profound and systematic theoretical analysis for theissues of the expression forms, basic characteristics and origins of Islamic extremism from theperspectives and levels of social and ideological roots. 展开更多
关键词 ISLAM extremism social roots ideological roots
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Design of a High‑Robustness Flap Skew Detection Monitoring Threshold
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作者 TIAN Jinqiang TONG Mingbo XUE Ying 《Transactions of Nanjing University of Aeronautics and Astronautics》 2026年第1期73-84,共12页
Focusing on civil aircraft flap skew detection design,this paper proposes a high-robustness monitoring design methodology to address insufficient monitor robustness that may trigger false alarms and disrupt airline op... Focusing on civil aircraft flap skew detection design,this paper proposes a high-robustness monitoring design methodology to address insufficient monitor robustness that may trigger false alarms and disrupt airline operations.Based on flap skew detection principles and threshold design criteria,the threshold range is defined with upper limit of maximum deformation under aerodynamic load and lower limit of sensor error margin and nominal flight deformation.Since the complex loading conditions of maximum flap differential deformation(max Δλ)during normal flight cannot be theoretically determined,probabilistic methods are employed:Flight test data from hundreds of sorties are analyzed using generalized extreme value distribution.Confidence levels are verified via Kolmogorov-Smirnov(K-S)hypothesis testing.Then probability density function of max Δλis established.The false alarm rate is calculated through cumulative probability values of max Δλat varying thresholds.Boundary conditions for false alarm rate are determined by safety assessment and dispatch reliability analysis.The derived monitoring threshold is verified against finite element analysis predictions and iron bird rig test.The results confirm the methodology’s validity,meeting all design objectives. 展开更多
关键词 FLAP skew detection extreme distribution hypothesis test false alarm rate
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Systematic study of laser-assisted cluster radioactivity for deformed nuclei
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作者 Leng-Jun Liao Lin-Jing Qi +2 位作者 Xi-Jun Wu Xiao-Hua Li Ming Li 《Nuclear Science and Techniques》 2026年第4期232-242,共11页
In this study,the effects of laser fields that can be achieved in the near future on cluster penetration probability and half-life are quantitatively investigated.The calculation results show that extreme laser fields... In this study,the effects of laser fields that can be achieved in the near future on cluster penetration probability and half-life are quantitatively investigated.The calculation results show that extreme laser fields can slightly change the cluster-decay half-life by affecting the penetration probability within a narrow range.Subsequently,we discuss the correlation between the change rate of the penetration probability and the tunneling path.The results indicate that for different parent nuclei emitting the same cluster,nuclei with longer tunneling paths are more easily affected by the laser fields.The shell effect on this correlation is also observed.In addition,the impact of laser fields on the penetration probability in any direction is investigated. 展开更多
关键词 Cluster radioactivity HALF-LIFE Extreme laser field Penetration probability
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Research on the Efficacy of Autologous Periosteum Graft Combined with PRP in the Treatment of Long Bone Fractures in the Extremities
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作者 Xiang Chen 《Journal of Clinical and Nursing Research》 2026年第1期323-330,共8页
Objective:To analyze the clinical application value of autologous periosteum graft combined with platelet-rich plasma(PRP)in the treatment of long bone fractures in the extremities.Methods:A total of 40 patients with ... Objective:To analyze the clinical application value of autologous periosteum graft combined with platelet-rich plasma(PRP)in the treatment of long bone fractures in the extremities.Methods:A total of 40 patients with long bone fractures in the extremities admitted to Santai Hospital Affiliated to North Sichuan Medical College from January 2023 to January 2025 were included,including cases of upper extremity forearm fractures and lower extremity femoral and tibial fractures.The patients were evenly divided using a random number table,with the control group undergoing open reduction and internal fixation(ORIF)combined with autologous periosteum graft,and the observation group undergoing ORIF,autologous periosteum graft,and PRP injection.Surgical indicators,complication rates,excellent fracture healing rates,functional satisfaction,and joint range of motion were compared between the two groups.Results:The surgical indicators in the observation group were similar to those in the control group(p>0.05).The complication rate in the observation group was lower than that in the control group,while the excellent fracture healing rate and functional satisfaction were higher in the observation group(p<0.05).Conclusion:Autologous periosteum graft combined with PRP technology is safe and reliable for the treatment of long bone fractures in the extremities,with satisfactory clinical outcomes. 展开更多
关键词 Periosteum graft Long bones of the extremities PRP Complication rate Fracture healing
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Nail abnormalities in upper extremity transplantation:Perspectives and insights from systemic diseases and organ transplantation
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作者 Naga Anvesh Kodali Ramu Janarthanan +6 位作者 Zeynep Demir Bedreddin Sazoglu Omer Faruk Dirican Dmitry Tuder Fatih Zor Yalcin Kulahci Vijay S Gorantla 《World Journal of Transplantation》 2026年第1期115-128,共14页
Nail changes following upper extremity transplantation(UET)cannot be overlooked as they possess diagnostic and prognostic relevance in allotransplantation of upper limbs.This comprehensive review explores nail and nai... Nail changes following upper extremity transplantation(UET)cannot be overlooked as they possess diagnostic and prognostic relevance in allotransplantation of upper limbs.This comprehensive review explores nail and nail bed related changes encountered in UET recipients in the literature.The differential diagnosis of nail abnormalities in UET includes a wide range of systemic,local and iatrogenic conditions other than immune responses to the allograft.It requires interdisciplinary evaluation by primary transplant surgeons,pathologists,dermatologists and immunologists.The possible underlying mechanisms of nail pathology in UET and the management are discussed.It also underscores the importance of onychodystrophy and need for timely intervention and to improve outcomes in UET recipients. 展开更多
关键词 Vascularized composite allotransplantation Upper extremity transplantation Hand transplantation Nail abnormalities Onychodystrophy Graft rejection Nailfold capillaroscopy
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Increasing meridional disparity of population exposure to heat stress
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作者 Xiaofan Xu Yuxiao Kong +5 位作者 Jintao Zhang Jianping Duan Minghong Tan Xue Yang Hongzhou Zhu Deliang Chen 《Geography and Sustainability》 2026年第1期95-105,共11页
Global warming and socioeconomic development are expected to exacerbate human exposure to heat stress,but the extent and inequality of such changes remain unclear.Here,we quantified the future population exposure to h... Global warming and socioeconomic development are expected to exacerbate human exposure to heat stress,but the extent and inequality of such changes remain unclear.Here,we quantified the future population exposure to heat stress(PEHS)under different Shared Socioeconomic Pathways(SSPs)and Representative Concentration Pathways(RCPs)scenarios using a novel decomposition framework that separates the contributions of climate change,population change,and their interaction.Results show that global PEHS will increase substantially during the 21st century,with low-latitude regions experiencing the largest absolute increases,and high-latitude regions facing the largest relative increases.Globally,projected increases in PEHS under SSP3-7.0 are roughly three times those under SSP1-2.6,with low latitudes contributing about 70%-75%of the global total.SSP1-2.6 most effectively limits future heat exposure,with the highest risks in low-latitude developing regions,underscoring the need for low-emission pathways and targeted population and urbanization management.The findings highlight the urgent need for both climate mitigation and population adaptation strategies to address the growing and uneven heat exposure risks worldwide. 展开更多
关键词 Population exposure Extreme heatwave Meridional disparity
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The Observed and Projected Changes of Global Monsoons:Current Status and Future Perspectives
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作者 Tianjun ZHOU Xiaolong CHEN +11 位作者 Wenxia ZHANG Bo WU Ziming CHEN Jie JIANG Xin HUANG Shuai HU Meng ZUO Wenmin MAN Lixia ZHANG Zhun GUO Pengfei LIN Lu WANG 《Advances in Atmospheric Sciences》 2026年第1期30-58,共29页
The global monsoon system,encompassing the Asian-Australian,African,and American monsoons,sustains two-thirds of the world’s population by regulating water resources and agriculture.Monsoon anomalies pose severe risk... The global monsoon system,encompassing the Asian-Australian,African,and American monsoons,sustains two-thirds of the world’s population by regulating water resources and agriculture.Monsoon anomalies pose severe risks,including floods and droughts.Recent research associated with the implementation of the Global Monsoons Model Intercomparison Project under the umbrella of CMIP6 has advanced our understanding of its historical variability and driving mechanisms.Observational data reveal a 20th-century shift:increased rainfall pre-1950s,followed by aridification and partial recovery post-1980s,driven by both internal variability(e.g.,Atlantic Multidecadal Oscillation)and external forcings(greenhouse gases,aerosols),while ENSO drives interannual variability through ocean-atmosphere interactions.Future projections under greenhouse forcing suggest long-term monsoon intensification,though regional disparities and model uncertainties persist.Models indicate robust trends but struggle to quantify extremes,where thermodynamic effects(warming-induced moisture rise)uniformly boost heavy rainfall,while dynamical shifts(circulation changes)create spatial heterogeneity.Volcanic eruptions and proposed solar radiation modification(SRM)further complicate predictions:tropical eruptions suppress monsoons,whereas high-latitude events alter cross-equatorial flows,highlighting unresolved feedbacks.The emergent constraint approach is booming in terms of correcting future projections and reducing uncertainty with respect to the global monsoons.Critical challenges remain.Model biases and sparse 20th-century observational data hinder accurate attribution.The interplay between natural variability and anthropogenic forcings,along with nonlinear extreme precipitation risks under warming,demands deeper mechanistic insights.Additionally,SRM’s regional impacts and hemispheric monsoon interactions require systematic evaluation.Addressing these gaps necessitates enhanced observational networks,refined climate models,and interdisciplinary efforts to disentangle multiscale drivers,ultimately improving resilience strategies for monsoon-dependent regions. 展开更多
关键词 global monsoons interannual variability decadal variability detection and attribution climate extreme events projection uncertainty
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Variations in Summer Extreme Heat Events in the Mongolian Plateau:Role of the Soil Moisture over the Inner Tibetan Plateau
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作者 Zhongren DENG Renhe ZHANG Zhiyan ZUO 《Advances in Atmospheric Sciences》 2026年第2期451-459,I0032-I0034,共12页
Recent studies have suggested that rapid warming over the Mongolian Plateau(MP) may intensify extreme heat events(EHEs). However, the characteristics and mechanisms driving summer EHEs over the MP(MP-EHEs) remain uncl... Recent studies have suggested that rapid warming over the Mongolian Plateau(MP) may intensify extreme heat events(EHEs). However, the characteristics and mechanisms driving summer EHEs over the MP(MP-EHEs) remain unclear. This study explores the interannual variations in summer MP-EHEs and their relationship with the summer soil moisture over the Inner Tibetan Plateau(TP-SM). The results reveal that changes in the MP-EHEs are linked to descending atmospheric motion induced by a local high-pressure system over the MP region. Descending motion further results in decreased mid-tolow-level cloud cover and increased shortwave radiation, thereby warming the surface and triggering summer MP-EHEs.Further analysis indicates that increased TP-SM results in a greater latent heat flux, triggering a local secondary circulation that reinforces the local high-pressure system over the MP region, thus serving to promote the occurrence of summer MPEHEs. Additionally, model results from the linear baroclinic model(LBM) and CMIP6 further confirm that variations in summer TP-SM contribute to the occurrence of the MP-EHEs. 展开更多
关键词 summer extreme heat events Mongolian Plateau soil moisture Tibetan Plateau
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Location matters:Rethinking wetland restoration for combating floods in China
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作者 Xi Zhang Jinwei Dong +1 位作者 Xinxin Wang Xiangming Xiao 《Geography and Sustainability》 2026年第1期232-235,共4页
1.Introduction In recent years,intensifying climate extremes have triggered a sharp increase in global natural disasters,over 90%attributable to water-related hazards,particularly floods(Hirabayashi et al.,2013).Over ... 1.Introduction In recent years,intensifying climate extremes have triggered a sharp increase in global natural disasters,over 90%attributable to water-related hazards,particularly floods(Hirabayashi et al.,2013).Over the past two decades,floods have inundated approximately 2.23 million km2 of land worldwide(Tellman et al.,2021),affecting over 250 million people and causing economic losses exceeding USD 651 billion(Devitt et al.,2023).Recent catastrophic floods in Pakistan,landslides in Indonesia,and dike breaches in China have intensified concerns over the effectiveness of current flood management strategies. 展开更多
关键词 dike brea floods natural disasters natural disastersover land inundation water related hazards wetland restoration climate extremes
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Extreme Attitude Prediction of Amphibious Vehicles Based on Improved Transformer Model and Extreme Loss Function
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作者 Qinghuai Zhang Boru Jia +3 位作者 Zhengdao Zhu Jianhua Xiang Yue Liu Mengwei Li 《哈尔滨工程大学学报(英文版)》 2026年第1期228-238,共11页
Amphibious vehicles are more prone to attitude instability compared to ships,making it crucial to develop effective methods for monitoring instability risks.However,large inclination events,which can lead to instabili... Amphibious vehicles are more prone to attitude instability compared to ships,making it crucial to develop effective methods for monitoring instability risks.However,large inclination events,which can lead to instability,occur frequently in both experimental and operational data.This infrequency causes events to be overlooked by existing prediction models,which lack the precision to accurately predict inclination attitudes in amphibious vehicles.To address this gap in predicting attitudes near extreme inclination points,this study introduces a novel loss function,termed generalized extreme value loss.Subsequently,a deep learning model for improved waterborne attitude prediction,termed iInformer,was developed using a Transformer-based approach.During the embedding phase,a text prototype is created based on the vehicle’s operation log data is constructed to help the model better understand the vehicle’s operating environment.Data segmentation techniques are used to highlight local data variation features.Furthermore,to mitigate issues related to poor convergence and slow training speeds caused by the extreme value loss function,a teacher forcing mechanism is integrated into the model,enhancing its convergence capabilities.Experimental results validate the effectiveness of the proposed method,demonstrating its ability to handle data imbalance challenges.Specifically,the model achieves over a 60%improvement in root mean square error under extreme value conditions,with significant improvements observed across additional metrics. 展开更多
关键词 Amphibious vehicle Attitude prediction Extreme value loss function Enhanced transformer architecture External information embedding
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Optimal Dispatch of Urban Distribution Networks Considering Virtual Power Plant Coordination under Extreme Scenarios
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作者 Yong Li Yuxuan Chen +4 位作者 Jiahui He Guowei He Chenxi Dai Jingjing Tong Wenting Lei 《Energy Engineering》 2026年第1期204-220,共17页
Ensuring reliable power supply in urban distribution networks is a complex and critical task.To address the increased demand during extreme scenarios,this paper proposes an optimal dispatch strategy that considers the... Ensuring reliable power supply in urban distribution networks is a complex and critical task.To address the increased demand during extreme scenarios,this paper proposes an optimal dispatch strategy that considers the coordination with virtual power plants(VPPs).The proposed strategy improves systemflexibility and responsiveness by optimizing the power adjustment of flexible resources.In the proposed strategy,theGaussian Process Regression(GPR)is firstly employed to determine the adjustable range of aggregated power within the VPP,facilitating an assessment of its potential contribution to power supply support.Then,an optimal dispatch model based on a leader-follower game is developed to maximize the benefits of the VPP and flexible resources while guaranteeing the power balance at the same time.To solve the proposed optimal dispatch model efficiently,the constraints of the problem are reformulated and resolved using the Karush-Kuhn-Tucker(KKT)optimality conditions and linear programming duality theorem.The effectiveness of the strategy is illustrated through a detailed case study. 展开更多
关键词 Urban distribution network virtual power plant power supply support leader-follower optimization game extreme weather scenarios
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Advanced forming technologies for integrated metal components with extreme size and structure:State-of-the-art and perspectives
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作者 Yizhe Chen Shilong Zhao +7 位作者 Yicheng Wang Yanxiong Liu Zhili Hu Dongsheng Qian Xinghui Han Hui Wang Jianguo Lin Lin Hua 《Chinese Journal of Mechanical Engineering》 2026年第1期211-235,共25页
In aerospace,nuclear power,and new energy vehicles industries,utilizing integrated metal components with extreme sizes and/or structures is crucial for achieving significant weight-saving,performance-improvement,and e... In aerospace,nuclear power,and new energy vehicles industries,utilizing integrated metal components with extreme sizes and/or structures is crucial for achieving significant weight-saving,performance-improvement,and excellent reliability.These components,made from metal sheets,rings,or tubes,exhibit characteristics like ultra-thin,ultra-thick,ultra-large,ultra-long,ultra-high ribs,and large variable diameters.During plastic de-formation in metal forming processes,defects such as ruptures,wrinkles,excessive strain differences,and un-expected weak performance areas are likely to occur due to the intersection of multiple effects in different research disciplines,including materials science,processes,and mechanics of materials.Consequently,the smooth forming of integrated parts is difficult.It is the first time to review,summarize,and analyze the ad-vancement of forming methods for producing integrated parts with extreme sizes and structures.The general academic ideas to change the process conditions and sequences to optimize stress state and improve plastic deformation ability for forming the components with extreme sizes/structures are introduced.Practical ex-amples,discussed in detail in the paper,include the forming of(i)integrated ultra-thin and ultra-thick sheet components;(ii)integrated ultra-large size ring components with thin wall and high ribs;and(iii)integrated ultra-long tube components with large perimeter difference.Various plasticity technologies and process se-quences have been developed.The key processes and applications of the technologies are discussed in detail,which achieve successful plastic forming of integrated components.This paper provides state-of-the-art and perspectives for the rapidly advancing material forming fields of key metal components for the next generation of equipment. 展开更多
关键词 Advanced forming technologies Integrated metal components Extreme size and structure
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