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Defection or Cooperation—Richard Power’s Moral Insights in Prisoner’s Dilemma 认领 引用
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作者 梁渊 宋祝 +1 位作者 陈益 周永胜 《海外英语》 2021年第4期239-241,共3页
Prisoner’s Dilemma is a master trope for relaying the permanent impasse or dilemma of cooperation versus defection.In Prisoner’s Dilemma Richard Powers narrates a multiform of dilemma mainly narrating Eddie Hobson’... Prisoner’s Dilemma is a master trope for relaying the permanent impasse or dilemma of cooperation versus defection.In Prisoner’s Dilemma Richard Powers narrates a multiform of dilemma mainly narrating Eddie Hobson’s traumatic history,along with Eddie’s attempt to carry out a strategy—Eddie’s ideal Hobstown which is supposed to cope with the confused dilemma.Pow⁃ers’strategic moral insights are revealed by assuming that each player feels sympathy for the other and a moral cooperative instead of antagonistic solution to the Prisoner’s Dilemma will be found. 展开更多
关键词 Defection Cooperation MoralInsights Prisoner’s Dilemma
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Effects of Probability of Accurately Predicting and Ascertaining Defection on Cooperation and its Application to Simulated Internet Dealing 认领 引用
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作者 Atsuo Murata Naoki Hata 《Computer Technology and Application》 2013年第2期93-104,共12页
Without cooperative behaviors, our society or organization falls into social dilemma situations where every member selects uncooperative （defective） behaviors, and the situation gets worse and worse. Such a situatio... Without cooperative behaviors, our society or organization falls into social dilemma situations where every member selects uncooperative （defective） behaviors, and the situation gets worse and worse. Such a situation in a society or an organization leads to violation of social or organizational rules, and at the worst case it suffers from serious accidents or scandals. Therefore, it is important for us to make efforts and take measures to elicit cooperative behaviors. It was demonstrated theoretically that altruism strategy and adaptive prediction and ascertainment strategy are in some cases better than rational strategy under the situation of social dilemma. We built up a mathematical model in order to examine how the probability of correctly predicting and ascertaining the behavior （cooperation or defection） of opponents and the mixture of （a） altruism （all cooperation） strategy, （b） individualism （all defection） strategy, and （c） adaptive prediction and ascertainment strategy affected the expected profit. Simulation results showed that the tit-for-tat strategy was better than the rational （individualism） strategy when the probability of correctly predicting and ascertaining defection of the opponent was considerably higher. As an application of the basic study above, it was explored, using a simulation method, how such a system as opening reputation or peer review in public could work satisfactorily to prevent defective behaviors in auction dealing. The result showed that the information on the handle name and the reputation effectively worked to prevent defective behaviors. 展开更多
关键词 Prisoner＇s dilemma cooperation defection ascertainment of defection internet dealing reputation.
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Novel time slicing approach for customer defection models in e-commerce:a case study 认领 引用
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作者 Kyriakos Georgiou Alexandros Chasapis 《Data Science and Management》 2022年第3期149-162,共14页
In this study,we examine the problem of predicting customer defection in a noncontractual setting.Motivated by recent work on machine learning using multiple time slices,we develop a novel training and testing framewo... In this study,we examine the problem of predicting customer defection in a noncontractual setting.Motivated by recent work on machine learning using multiple time slices,we develop a novel training and testing framework,the sliding multi-time slicing(SMTS)method.We apply this method to data from the largest marketplace in Greece,namely,Skroutz,considering the standard features that account for the important characteristics of customer activity and custom performance metrics aimed at capturing business-related goals established by the company.The dataset comprises customers over a relatively short period,since April 2018,the number of which has also exhibited a significant increase in recent months.Despite these difficulties and the inherent seasonality of customer defection,our results demonstrate that,with SMTS,developing models that outperform previous approaches and optimize decision-making is possible.We validate the approach to a benchmark dataset from the commerce sector and discuss the practical considerations and requirements of the proposed method. 展开更多
关键词 E-commerce Defection Seasonality Machine learning
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Effects of Probability of Revelation of Defection and Penalty to Defection on Cooperative Behavior in 2-Person Prisoner's Dilemma Game 认领 引用 被引量：3
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作者 Atsuo Murata Takuma Kanagawa Naoki Hata 《Computer Technology and Application》 2012年第11期749-755,共7页
In our society, it is a major issue to enhance cooperative behaviors. Without this, our society fall into social dilemma situations, and gets worse and worse. Such a situation in an organization leads to violation of ... In our society, it is a major issue to enhance cooperative behaviors. Without this, our society fall into social dilemma situations, and gets worse and worse. Such a situation in an organization leads to violation of social or organizational rules, and at the worst case it suffers from serious accidents or scandals. Therefore, it is important for organizational managers to make efforts and take measures to enhance cooperative behaviors. Although there seem to be many ways to constantly elicit cooperative behaviors, the punishment is one of the most effective measures for enhancing cooperation. This study focused on the effects of penalty and probability of the revelation of defection on the cooperation, and getting insight into how punishment strategy should be used to get rid of social dilemmas and enhance cooperation. This study conducted a simulation experiment to find the proper penal regulations condition that can suppress violations （defective behavior） in a 2-person prisoner＇s dilemma situation. The effects of probability of the revelation of defection and penalty to revelation on the cooperative behavior were identified with the interactive effect of both experimental factors. The defection （uncooperative behavior） decreased when the penalty to the defection was heavy and the probability of the revelation of defection was low than that when the penalty to the defection was light and the probability of the revelation of the defection was high. 展开更多
关键词 Prisoner＇s dilemma cooperation defect punishment model violation-based accident.
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Multifunctional MXene for Thermal Management in Perovskite Solar Cells 认领 引用 被引量：4
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作者 Zhongquan Wan Runmin Wei +5 位作者 Yuanxi Wang Huaibiao Zeng Haomiao Yin Muhammad Azam Junsheng Luo Chunyang Jia 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第1期458-473,共16页
Perovskite solar cells(PSCs)have emerged as promising photovoltaic technologies owing to their remarkable power conversion efficiency(PCE).However,heat accumulation under continuous illumination remains a critical bot... Perovskite solar cells(PSCs)have emerged as promising photovoltaic technologies owing to their remarkable power conversion efficiency(PCE).However,heat accumulation under continuous illumination remains a critical bottleneck,severely affecting device stability and long-term operational performance.Herein,we present a multifunctional strategy by incorporating highly thermally conductive Ti3C2TX MXene nanosheets into the perovskite layer to simultaneously enhance thermal management and optoelectronic properties.The Ti3C2TX nanosheets,embedded at perovskite grain boundaries,construct efficient thermal conduction pathways,significantly improving the thermal conductivity and diffusivity of the film.This leads to a notable reduction in the device’s steady-state operating temperature from 42.96 to 39.97 under 100 mW cm−2 illumination,thereby alleviating heat-induced performance degradation.Beyond thermal regulation,Ti3C2TX,with high conductivity and negatively charged surface terminations,also serves as an effective defect passivation agent,reducing trap-assisted recombination,while simultaneously facilitating charge extraction and transport by optimizing interfacial energy alignment.As a result,the Ti3C2TX-modified PSC achieve a champion PCE of 25.13%and exhibit outstanding thermal stability,retaining 80%of the initial PCE after 500 h of thermal aging at 85 and 30±5%relative humidity.(In contrast,control PSC retain only 58%after 200 h.)Moreover,under continuous maximum power point tracking in N2 atmosphere,Ti3C2TX-modified PSC retained 70%of the initial PCE after 500 h,whereas the control PSC drop sharply to 20%.These findings highlight the synergistic role of Ti3C2TX in thermal management and optoelectronic performance,paving the way for the development of high-efficiency and heat-resistant perovskite photovoltaics. 展开更多
关键词 Perovskite solar cells Heat accumulation Thermal management Multifunctional MXene Defect passivation
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Expert consensus on orthodontic-associated alveolar ridge augmentation for adult patients 认领 引用 被引量：2
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作者 Runzhi Guo Xiaotong Li +24 位作者 Jianxia Hou Yiping Huang Bing Fang Hong He Zuolin Jin Fuhua Yan Lin Wang Yuxing Bai Wenjie Hu Lili Chen Jinlin Song Xianglong Han Fang Jin Jun Wang Min Hu Yang Cao Yuehua Liu Haiping Lu Bin Yan Yan Xu Wensheng Ma Yifan Lin Xiao Xu Li Xu Weiran Li 《International Journal of Oral Science》 SCIE CAS CSCD 2026年第2期208-217,共10页
Alveolar bone defects,including dehiscence and fenestration,are commonly encountered in adult patients seeking orthodontic treatment.These anatomical deficiencies increase the risk of periodontal complications and may... Alveolar bone defects,including dehiscence and fenestration,are commonly encountered in adult patients seeking orthodontic treatment.These anatomical deficiencies increase the risk of periodontal complications and may significantly compromise orthodontic tooth movement.Alveolar bone defects can also develop during orthodontic treatment,particularly in adult patients with narrow alveolar ridges requiring excessive tooth movement.Orthodontic-associated alveolar ridge augmentation(OARA)is an effective treatment approach that provides additional bone support and facilitates tooth movement,thereby reducing the incidence of periodontal complications and accelerating and broadening the scope of movement.At present,standardized diagnostic and treatment protocols for OARA in adult patients are lacking.This expert consensus aims to provide evidence-based recommendations for OARA in adult patients.A multidisciplinary panel of 27 experts conducted a Delphi-style process incorporating a targeted literature review and three voting rounds,achieving≥70%agreement.Twenty-nine consensus statements across seven clinical domains,including pre-OARA examination,indications,bone graft material selection,timing,surgical protocols,standard operating procedures and considerations,were established with recommendations graded according to adapted GRADE criteria.This report presents a structured clinical framework for OARA and identifies future research priorities. 展开更多
关键词 bone defects alveolar bone defectsincluding dehiscence periodontal complications narrow alveolar ridges alveolar bone defects orthodontic associated alveolar ridge augmentation anatomical deficiencies
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Soil desiccation cracking triggered by surface defects:Insight and mechanism based on strain/displacement analysis using DIC 认领 引用 被引量：2
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作者 Tao Wang Chao-Sheng Tang +3 位作者 Luan Lin Zhixiong Zeng Qing Cheng Zhengtao Shen 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第1期651-661,共11页
Soil desiccation cracking is a prevalent natural phenomenon that poses significant geotechnical and geoenvironmental challenges.Cracks typically initiate at surface defects such as air bubbles,large aggregates,tiny pi... Soil desiccation cracking is a prevalent natural phenomenon that poses significant geotechnical and geoenvironmental challenges.Cracks typically initiate at surface defects such as air bubbles,large aggregates,tiny pits,or uneven surfaces,where localized stress concentrations are readily induced.This study conducted a series of laboratory desiccation tests on slurry samples to investigate the initiation and propagation of desiccation cracks in the presence of varying types and quantities of surface defects.Digital image correlation(DIC)technology was employed to monitor the strain and displacement fields on the soil surface during the desiccation process.The results reveal that strain and displacement data derived from DIC can precisely predict the initiation sites and propagation directions of desiccation cracks.In samples with internal defects,cracks predominantly propagate through the defect,whereas external defects tend to initiate cracks along their edges.In samples with multiple defects,Y-shaped crack patterns generally form initially,followed by T-shaped and straight cracks,driven by the evolving stress field.The dynamic interplay between crack formation and tensile stress redistribution governs the initiation and propagation of desiccation cracks. 展开更多
关键词 Desiccation cracking Digital image correlation(DIC)technology Defect Strain/displacement field Stress concentration
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Definition of critical skin defect and concepts of structural and functional repairs:Proposal and verification in a rat model 认领 引用 被引量：1
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作者 Cong Sun Weihong Guo +4 位作者 Fang Liang Rabia Javed Weijian Hou Xingdong Zhang Qiang Ao 《Animal Models and Experimental Medicine》 CAS CSCD 2026年第1期168-182,共15页
Background:Rats are often used to prepare skin defect models.However,the skin defect sizes of the models prepared by researchers are different,and the lack of consensus on the critical-size defect makes it difficult t... Background:Rats are often used to prepare skin defect models.However,the skin defect sizes of the models prepared by researchers are different,and the lack of consensus on the critical-size defect makes it difficult to compare their research results.Methods:The time for wound closure was evaluated and recorded through gross observation.The regression equation between the healing time and the diameter of skin defect was established,which can be used to predict the healing time for a certain skin defect size in rats.Histochemical and immunohistochemical staining was used to observe the regeneration and reconstruction of skin appendages,and the functional skin repair was quantitatively scored.Results:The critical-size defect of rats was determined based on the maximum capacity of structural skin repair,and the functional skin repair was quantitatively scored based on the regeneration and reconstruction of skin appendages.The allowable range of critical-size skin defect of SD rats lies between 45 and 50 mm in diameter.The concept of structural repair and the category of functional repair of injured skin are put forward.The regression equation between the structural skin healing time and defect diameters is established.Conclusion:The allowable range of skin critical-size defect of SD rats lies between 45 and 50 mm in diameter.The regression equation between the structural skin healing time and defect diameters can be used to predict the healing time for a certain skin defect size in rats. 展开更多
关键词 critical defect functional repair quantitative evaluation skin defect structural repair
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Interfacial microstructure and properties of additively manufactured composite rollers after online service 认领 引用 被引量：1
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作者 Xin Di Hao-zheng Li +5 位作者 Ce Ji Peng-rui Li Shi-bin Liu Jin-feng Chen Wei-guo Han Hua-gui Huang 《China Foundry》 SCIE EI CAS CSCD 2026年第4期577-590,共14页
Composite rollers serve as critical components in modern slab continuous casting systems,particularly the No.0 segment rollers positioned at the mold exit,which endure severe service conditions and intermittent therma... Composite rollers serve as critical components in modern slab continuous casting systems,particularly the No.0 segment rollers positioned at the mold exit,which endure severe service conditions and intermittent thermal shocks.The service stability of these composite rollers directly determines the continuous operation capability of casting lines and per-ton steel cost control,making reliability enhancement a critical research topic in the field of metallurgical equipment.In this study,414N/42CrMo heterogeneous composite rollers with gradient properties were fabricated by additive manufacturing.The multi-scale characterization techniques were conducted on the composite rollers after online service for 2.5 months in a continuous casting line,including SEM,EBSD,and X-ray computed tomography for 3D defect mapping.The elemental interdiffusion kinetics,microstructure,and defect distribution were systematically elucidated.The directional migration of Cr/Mo elements enables the formation of a gradient interfacial architecture:heterogeneous interfacial thickness with alternating peak-valley morphology driven by differential elemental diffusion behaviors,progressive transitions in grain boundary configurations from low-angle to high-angle,and gradient variations in grain size distribution across adjacent microstructural zones.X-ray computed tomography reveals that the defect distribution across the entire interfacial region exhibits spatial heterogeneity,characterized by the presence of distinct defect clusters from the 414N cladding layer near the interface,accompanied by localized aggregations of irregular defects(with an equivalent diameter greater than 50μm).Therefore,a remanufacturing strategy is proposed to eliminate defect-rich interfacial layers and reconstruct gradient-compatible interfaces for performance resto ration,which offers practical solutions for extending service life through precision remanufacturing. 展开更多
关键词 composite rollers gradient material microstructure microscale defects additive manufacturing
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Study on the destabilizing damage precursors of cemented tailings backfill based on critical slowing down theory combined with multiple denoising algorithms under consideration of initial defect conditions 认领 引用 被引量：1
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作者 ZHAO Kang ZHONG Jun-cheng +3 位作者 YAN Ya-jing LIU Yang WEN Dao-tan XIAO Wei-ling 《Journal of Central South University》 SCIE EI CAS CSCD 2026年第1期375-399,共25页
The cemented tailings backfill(CTB)with initial defects is more prone to destabilization damage under the influence of various unfavorable factors during the mining process.In order to investigate its influence on the... The cemented tailings backfill(CTB)with initial defects is more prone to destabilization damage under the influence of various unfavorable factors during the mining process.In order to investigate its influence on the stability of underground mining engineering,this paper simulates the generation of different degrees of initial defects inside the CTB by adding different contents of air-entraining agent(AEA),investigates the acoustic emission RA/AF eigenvalues of CTB with different contents of AEA under uniaxial compression,and adopts various denoising algorithms(e.g.,moving average smoothing,median filtering,and outlier detection)to improve the accuracy of the data.The variance and autocorrelation coefficients of RA/AF parameters were analyzed in conjunction with the critical slowing down(CSD)theory.The results show that the acoustic emission RA/AF values can be used to characterize the progressive damage evolution of CTB.The denoising algorithm processed the AE signals to reduce the effects of extraneous noise and anomalous spikes.Changes in the variance curves provide clear precursor information,while abrupt changes in the autocorrelation coefficient can be used as an auxiliary localization warning signal.The phenomenon of dramatic increase in the variance and autocorrelation coefficient curves during the compression-tightening stage,which is influenced by the initial defects,can lead to false warnings.As the initial defects of the CTB increase,its instability precursor time and instability time are prolonged,the peak stress decreases,and the time difference between the CTB and the instability damage is smaller.The results provide a new method for real-time monitoring and early warning of CTB instability damage. 展开更多
关键词 initial defects cemented tailings backfill critical slowing down acoustic emission RA/AF values denoising algorithms
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Steel Surface Defect Detection via the Multiscale Edge Enhancement Method 认领 引用 被引量：1
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作者 Yuanyuan Wang Yemeng Zhu +2 位作者 Xiuchuan Chen Tongtong Yin Shiwei Su 《Computers, Materials & Continua》 SCIE EI 2026年第3期1006-1032,共27页
To solve the false detection and missed detection problems caused by various types and sizes of defects in the detection of steel surface defects,similar defects and background features,and similarities between differ... To solve the false detection and missed detection problems caused by various types and sizes of defects in the detection of steel surface defects,similar defects and background features,and similarities between different defects,this paper proposes a lightweight detection model named multiscale edge and squeeze-and-excitation attention detection network(MSESE),which is built upon the You Only Look Once version 11 nano(YOLOv11n).To address the difficulty of locating defect edges,we first propose an edge enhancement module(EEM),apply it to the process of multiscale feature extraction,and then propose a multiscale edge enhancement module(MSEEM).By obtaining defect features from different scales and enhancing their edge contours,the module uses the dual-domain selection mechanism to effectively focus on the important areas in the image to ensure that the feature images have richer information and clearer contour features.By fusing the squeeze-and-excitation attention mechanism with the EEM,we obtain a lighter module that can enhance the representation of edge features,which is named the edge enhancement module with squeeze-and-excitation attention(EEMSE).This module was subsequently integrated into the detection head.The enhanced detection head achieves improved edge feature enhancement with reduced computational overhead,while effectively adjusting channel-wise importance and further refining feature representation.Experiments on the NEU-DET dataset show that,compared with the original YOLOv11n,the improved model achieves improvements of 4.1%and 2.2%in terms of mAP@0.5 and mAP@0.5:0.95,respectively,and the GFLOPs value decreases from the original value of 6.4 to 6.2.Furthermore,when compared to current mainstream models,Mamba-YOLOT and RTDETR-R34,our method achieves superior performance with 6.5%and 8.9%higher mAP@0.5,respectively,while maintaining a more compact parameter footprint.These results collectively validate the effectiveness and efficiency of our proposed approach. 展开更多
关键词 Steel defects object detection algorithms small target multiscale attention mechanism
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3D forming space and abnormal lamellar microstructures in a Mg-10Gd-Zr alloy fabricated by laser powder bed fusion 认领 引用 被引量：1
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作者 Ziyi Liu Qingchen Deng +4 位作者 Ziyan Li Yiwen Ding Jing Luo Hong Liu Liming Peng 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第2期460-479,共20页
Mg-10Gd-Zr(G10K,wt.%)is a commonly used high-performance magnesium-rare earth alloy that has demonstrated good suitability for additive manufacturing processes.However,the formability and microstructures need to be fu... Mg-10Gd-Zr(G10K,wt.%)is a commonly used high-performance magnesium-rare earth alloy that has demonstrated good suitability for additive manufacturing processes.However,the formability and microstructures need to be further explored for its engineering application.This study presents a systematic and in-depth investigation of the defects,microstructural characteristics,and mechanical properties of G10K alloy fabricated by laser powder bed fusion(LPBF)as a function of processing parameters.A 3D forming space for LPBF-G10K alloy is constructed by adopting laser beam diameter as the third variant other than laser power and scanning speed.With a laser beam diameter of 120μm,the fluctuation of the melt pool is minimized,leading to the suppression of gas porosities and balling defects,and thus the expansion of forming zone of the alloy as compared to laser beam diameters of 100 or 140μm.LPBF-G10K alloy under the optimal processing parameter consists of a heterogeneous microstructure of coarse and fine grains.The formation of abnormal lamellar structures in the coarse grains at the middle of melt pools is attributed to the planar growth along laser scanning direction.The lamellar coarse grains provide strength in the alloy due to texture-strengthening effect,while plastic deformation is primarily accommodated by equiaxed grains.These findings are instrumental for application and future modification of the LPBF-G10K alloy. 展开更多
关键词 Laser powder bed fusion Mg-Gd alloy Laser beam diameter,defect Lamellar microstructure
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Coupled Effects of Single-Vacancy Defect Positions on the Mechanical Properties and Electronic Structure of Aluminum Crystals 认领 引用 被引量：1
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作者 Binchang Ma Xinhai Yu Gang Huang 《Computers, Materials & Continua》 SCIE EI 2026年第1期332-352,共21页
Vacancy defects,as fundamental disruptions in metallic lattices,play an important role in shaping the mechanical and electronic properties of aluminum crystals.However,the influence of vacancy position under coupled t... Vacancy defects,as fundamental disruptions in metallic lattices,play an important role in shaping the mechanical and electronic properties of aluminum crystals.However,the influence of vacancy position under coupled thermomechanical fields remains insufficiently understood.In this study,transmission and scanning electron microscopy were employed to observe dislocation structures and grain boundary heterogeneities in processed aluminum alloys,suggesting stress concentrations and microstructural inhomogeneities associated with vacancy accumulation.To complement these observations,first-principles calculations and molecular dynamics simulations were conducted for seven single-vacancy configurations in face-centered cubic aluminum.The stress response,total energy,density of states(DOS),and differential charge density were examined under varying compressive strain(ε=0–0.1)and temperature(0–600 K).The results indicate that face-centered vacancies tend to reduce mechanical strength and perturb electronic states near the Fermi level,whereas corner and edge vacancies appear to have weaker effects.Elevated temperatures may partially restore electronic uniformity through thermal excitation.Overall,these findings suggest that vacancy position exerts a critical but position-dependent influence on coupled structure-property relationships,offering theoretical insights and preliminary experimental support for defect-engineered aluminum alloy design. 展开更多
关键词 Aluminum crystal vacancy defect microstructural characterization stress response electronic structure thermomechanical coupling
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Quantitative Defect-Property Correlations in Ti3C2Tx MXenes via Precursor‑Controlled Defect Engineering 认领 引用
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作者 Tufail Hassan Doyeon Lee +13 位作者 Shabbir Madad Naqvi Myungjae Kim Jung‑Min Oh Sang Woon Park Aamir Iqbal Soo Yeong Cho Zhiwang Hao Noushad Hussain Zubair Khalid Shakir Zaman Xiangmeng Kong Ki‑Min Roh Hanjung Kwon Chong Min Koo 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第8期235-251,共17页
Defect engineering holds great promise for tailoring the multifunctional properties of MXenes.However,quantitative correlations between defect and material performance remain largely unexplored due to the lack of a re... Defect engineering holds great promise for tailoring the multifunctional properties of MXenes.However,quantitative correlations between defect and material performance remain largely unexplored due to the lack of a reliable strategy to precisely control defect densities.Here,we demonstrate that the defect density of Ti3C2Tx MXenes—including titanium and carbon vacancies,substitutional oxygen defects,and the associated lattice strain—is precisely controlled by adjusting carbon stoichiometry during TiC precursor synthesis and aluminum content during Ti3AlC2 MAX formation.The defect densities propagate from precursors to final MXenes,enabling the fabrication of a series of Ti3C2Tx MXenes with systematically controlled defect densities.This allows a quantitative correlation between defect density and multifunctional properties including electrical and thermal conductivities,infrared emissivity,electromagnetic shielding effectiveness,Joule heating performance,and oxidation stability.The defect-minimized Ti3C2Tx MXene exhibits outstanding performance,with an electrical conductivity of 26,000 S cm−1,thermal conductivity of 57 W m−1 K−1,electromagnetic shielding effectiveness of 90.5 dB at 10μm,Joule heating performance of 263℃ at 1.5 V,ultralow infrared emissivity of 0.05,and superior oxidation resistance(activation energy of 72 kJ mol−1).Furthermore,this work establishes a comprehensive quantitative framework linking defect structure to multifunctional performance and stability. 展开更多
关键词 MXenes Defect engineering Vacancies and substitutions defects Defect-property correlation Oxidation resistance
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A hierarchical Bayesian–MCMC model for predicting the geometric dimensions of corrosion defects in wet gas gathering pipelines 认领 引用
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作者 Si-Jia Chen Min Qin +2 位作者 Ke-Xi Liao Yong-Chun Mu Xiao-Dong Hao 《Petroleum Science》 SCIE EI CAS CSCD 2026年第3期1487-1504,共18页
Internal corrosion is a major threat to the safety of natural gas pipelines,with defect geometry—depth,length,and width—playing a critical role in structural integrity assessments.While corrosion depth prediction ha... Internal corrosion is a major threat to the safety of natural gas pipelines,with defect geometry—depth,length,and width—playing a critical role in structural integrity assessments.While corrosion depth prediction has been widely studied,systematic probabilistic modeling of defect length and width remains limited.This study develops a hierarchical Bayesian-Markov Chain Monte Carlo(HB-MCMC)framework to jointly predict corrosion defect dimensions from in-line inspection(ILI)data.The framework integrates non-centered parameterization and adaptive sampling to improve inference efficiency and employs a hierarchical dynamic thresholding procedure for robust data preprocessing and outlier filtering.Field data from two transmission pipelines in Southwest China,comprising 1845 defect records,are analyzed.Results demonstrate that defect length and width both increase with depth,with width exhibiting stronger sensitivity.Model diagnostics confirm convergence and reliable uncertainty quantification.To further explore underlying mechanisms,OLGA multiphase flow simulations are combined with statistical predictions,providing flow-parameter profiles along the pipelines and enabling correlation analysis between local hydrodynamics and defect geometry.The proposed framework not only enhances predictive capability for defect length and width but also provides new insights into flow-corrosion interactions under real operating conditions,offering a reproducible and data-driven tool for corrosion assessment. 展开更多
关键词 Corrosion defects Defect dimensions Hierarchical Bayesian Markov Chain Monte Carlo Corrosion prediction
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Anomalous Fluorescence Thermal Quenching in a Red-emitting RbZnF3:Eu3+ Phosphor under Violet Excitation 认领 引用
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作者 DONG Langping LI Shixuan +7 位作者 YANG Shaoxing HOU Jingshan LIN Yandan ZHOU Pengcheng SUN Xuejiao SUN Yiyang CHEN Daqin FANG Yongzheng 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2026年第5期673-680,I0024-I0026,共8页
Thermal quenching is a key challenge in the application of fluorescent materials in solid state lighting devices.Herein,we report a perovskite phosphor RbZnF3:Eu3+exhibiting anti-thermal quenching behavior.Under... Thermal quenching is a key challenge in the application of fluorescent materials in solid state lighting devices.Herein,we report a perovskite phosphor RbZnF3:Eu3+exhibiting anti-thermal quenching behavior.Under violet excitation,this phosphor yields bright red emission.As the temperature rises,the luminescence intensity first increases up to 175℃(i.e.,anti-thermal quenching)and then decreases.When the temperature is above 200℃,the luminescence intensity falls below the value at room temperature.Comprehensive characterizations demonstrate that the observed anti-thermal quenching behavior is mainly due to the existence of defect levels.First-principles calculations show that Rb vacancy and F vacancy could be responsible for the observed defect levels.Finally,this study has fabricated a white light-emitting diode(LED)using the RbZnF3:Eu3+phosphor which verifies its potential application. 展开更多
关键词 phosphor thermal quenching perovskite light-emitting diode defect engineering
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Erratum:Bone Regeneration Eff cacy and Applicability of Defect-Fitting 4D Scaffolds Based on Shape Conformity in Three-dimensional Curved Bone Defects 认领 引用
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作者 Min-Soo Ghim Se-Jin Jang +3 位作者 Eun-Yong Choi Meiling Quan Young-Yul Kim Young-Sam Cho 《Journal of Bionic Engineering》 SCIE EI CSCD 2026年第1期550-550,共1页
The original online version of this article was revised:The layout update for Article 758 has impacted the page range in the published issue,but did not affect the scholarly content.To ensure consistency with the orig... The original online version of this article was revised:The layout update for Article 758 has impacted the page range in the published issue,but did not affect the scholarly content.To ensure consistency with the originally assigned pages(2595-2614),we will need to publish an erratum to correct the article and restore the original page range.The original article has been corrected. 展开更多
关键词 defect fitting D scaffolds layout update shape conformity three dimensional curved bone defects bone regeneration
Defect engineering of TiO2 for efficient photocatalytic transfer hydrogenation with palladium as cocatalyst and water as a hydrogen source 认领 引用
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作者 En Zhao Jingyuan Su +6 位作者 Hehe Fan Bing Nan Lina Li Haifeng Qi Weiwei Fang Wenjun Zhang Zupeng Chen 《Green Energy & Environment》 SCIE EI CAS CSCD 2026年第2期557-564,共8页
Photocatalytic transfer hydrogenation using water as the proton source has emerged as an attractive and green approach for the catalytic reduction of unsaturated bonds.Herein,we report an oxygen-defective TiO2-supp... Photocatalytic transfer hydrogenation using water as the proton source has emerged as an attractive and green approach for the catalytic reduction of unsaturated bonds.Herein,we report an oxygen-defective TiO2-supported palladium catalyst(Pd-TiO2-Ov)for efficient photocatalytic water-donating transfer hydrogenation of anethole towards 4-n-propylanisole in a high yield of 99.9%,which is significantly higher compared to the pristine TiO2-supported palladium catalyst(Pd-TiO2,74%).The enhanced performance is ascribed to the presence of oxygen vacancies,which facilitate light absorption and suppress the recombination of photogenerated electron-hole pairs.Furthermore,the Pd-TiO2-Ov is versatile in hydrogenating various alkene substrates including those with hydroxyl,ether,fluoride,and chloride functional groups in full conversion,thus offering a green method for transfer hydrogenation of alkenes.This study provides new insights and advances in current hydrogenation technology with water as the proton source. 展开更多
关键词 Photocatalysis Transfer hydrogenation Palladium Defect engineering Water splitting
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Engineering dual defects onto graphitic carbon nitride nanosheets enables outstanding performance for photodegradation of microcystin-LR 认领 引用
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作者 Ziqi Deng Wenqing Zhang +4 位作者 Liangjie Shen Lei Shi Xiang Zheng Jianzhong Zheng Rong Cheng 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第2期60-69,共10页
Algal blooms in eutrophic water often produce microcystins,which can lead to multi-organ dysfunction and even mortality in many organisms.Therefore,the elimination of microcystins in water is an urgent issue that need... Algal blooms in eutrophic water often produce microcystins,which can lead to multi-organ dysfunction and even mortality in many organisms.Therefore,the elimination of microcystins in water is an urgent issue that needs to be addressed.Herein,we develop a dual defect engineering strategy to construct graphite-like carbon nitride with N vacancies and-C≡N groups(NgCN)nanosheets for microcystin-LR(MC-LR)photodegradation.According to our theoretical calculations and actual findings,the NgCN nanosheets enhanced recyclability for the removal of MC-LR while also demonstrating outstanding photocatalytic efficacy,significantly surpassing the graphite-like carbon nitride under visible light,which is ascribed to efficient charge separation as well as narrowing the bandgap.Impressively,the water quality after photodegradation has been proven to be safe based on International Organization for Standardization(ISO)standards.This finding provides meaningful insights into understanding the relationship between defect engineering and photodegradation performance to design photocatalytic materials with higher activity for environmental remediation. 展开更多
关键词 NgCN Dual defects Microcystin-LR(MC-LR) Photodegradation Mechanism
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Defect Engineering via Ultrasonic Vibration for Activating High-Valent Nickel Sites Toward Enhanced Seawater Urea Oxidation Reaction 认领 引用
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作者 Xiaoyu Wu Yutao Tan +9 位作者 Shengyu Zhao Luoyu Hu Zhenxuan Zhang Wenqing Ruan Xiaodi Liu Jie Dong Cunhong Yin Dabin Zhang Chaoqun Pei Jiang Ma 《Rare Metals》 SCIE EI CAS CSCD 2026年第7期726-738,共13页
Developing high-efficiency catalysts for the seawater urea oxidation reaction(UOR)is pivotal to advancing hydrogen production via seawater electrolysis.Defect engineering has established itself as a core strategy for ... Developing high-efficiency catalysts for the seawater urea oxidation reaction(UOR)is pivotal to advancing hydrogen production via seawater electrolysis.Defect engineering has established itself as a core strategy for regulating catalytic activity.However,conventional defect regulation technologies are predominantly hindered by inherent drawbacks such as high energy consumption,substantial costs,and environmental contamination.Herein,we introduce high-frequency ultrasonic vibration cold-manufacture(HUVCM)as a novel,eco-friendly,and highly efficient defect engineering approach to fabricate high-performance Ni-based catalysts for seawater UOR.Our findings demonstrate that HUVCM induces the formation of high-density dislocation defects on the surface of Ni-based alloys,which subsequently initiate the in situ construction of ultra-fine nanocrystalline structures with an average grain size of~5 nm.The Ni-based alloys modified by HUVCM exhibit remarkably enhanced catalytic activity toward both the hydrogen evolution reaction and UOR.Notably,for UOR,the catalyst shows excellent activity with merely 1.4 V at 100 mA cm−2,placing the catalyst among the state-of-the-art Ni-based seawater UOR electrocatalysts.We further reveal that the superior catalytic performance stems directly from the elevated valence states of constituent elements,which are effectively modulated by the high-density dislocation defects introduced via HUVCM.This work proposes an efficient and facile defect-engineering strategy for electrocatalysts,while establishing a pivotal foundation for the industrial-scale production of hydrogen via seawater electrolysis. 展开更多
关键词 defect engineering Ni-based catalyst ultrasonic vibration urea oxidation reaction
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