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CT-derived fractional flow reserve combined with atherosclerotic extent to determine long-term outcomes in diabetic patients with coronary artery disease 认领 引用 被引量：2
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作者 Zhi-Qiang WANG Zhen-Nan LI +1 位作者 Zhi-Hui HOU Bin LU 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2026年第1期27-35,共9页
Background There is still limited data on predictive value of coronary computed tomography angiography(CCTA)–derived fractional flow reserve(CT-FFR) for long term outcomes. We examined the long-term prognostic value ... Background There is still limited data on predictive value of coronary computed tomography angiography(CCTA)–derived fractional flow reserve(CT-FFR) for long term outcomes. We examined the long-term prognostic value of CT-FFR combined with CCTA–defined atherosclerotic extent in diabetic patients with coronary artery disease(CAD).Methods A retrospective pooled analysis of individual patient data was performed. Deep-learning-based vessel-specific CTFFR was calculated. All patients enrolled were followed-up for at least 5 years. Predictive abilities for major adverse cardiac events(MACE) were compared among three models(model 1), constructed using clinical variables;model 2, model 1+CCTA–derived atherosclerotic extent(Leiden risk score);and model 3, model 2+CT-FFR.Results A total of 480 diabetic patients [median age, 61(55–66) years;52.9% men] were included. During a median follow-up time of 2197(2126–2355) days, 55 patients(11.5%) experienced MACE. In multivariate-adjusted Cox models, Leiden risk score(HR: 1.06;95% CI: 1.01–1.11;P = 0.013) and CT-FFR ≤ 0.80(HR: 6.54;95% CI: 3.18–13.45;P < 0.001) were the independent predictors. The discriminant ability was higher in model 2 than in model 1(C-index, 0.75 vs. 0.63;P < 0.001) and was further promoted by adding CT-FFR to model 3(C-index, 0.81 vs. 0.75;P = 0.002). Net reclassification improvement(NRI) was 0.19(P = 0.009) for model 2 beyond model 1. Of note, adding CT-FFR to model 3 also exhibited significantly improved reclassification compared with model 2(NRI = 0.14;P = 0.011).Conclusion In diabetic patients with CAD, CT-FFR provides robust and incremental prognostic information for predicting longterm outcomes. The combined model exhibits improved prediction abilities, which is beneficial for risk stratification. 展开更多
关键词 fractional flow reserve ct ffr coronary artery disease cad methods tomography angiography ccta derived coronary artery disease atherosclerotic extent fractional flow reserve diabetic patients coronary computed tomography angiography
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A Deterministic and Stochastic Fractional-Order Model for Computer Virus Propagation with Caputo-Fabrizio Derivative:Analysis,Numerics,and Dynamics 认领 引用 被引量：1
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作者 Najat Almutairi Mohammed Messaoudi +1 位作者 Faisal Muteb K.Almalki Sayed Saber 《Computer Modeling in Engineering & Sciences》 SCIE EI 2026年第3期806-843,共38页
This paper introduces a novel fractional-order model based on the Caputo-Fabrizio(CF)derivative for analyzing computer virus propagation in networked environments.The model partitions the computer population into four... This paper introduces a novel fractional-order model based on the Caputo-Fabrizio(CF)derivative for analyzing computer virus propagation in networked environments.The model partitions the computer population into four compartments:susceptible,latently infected,breaking-out,and antivirus-capable systems.By employing the CF derivative—which uses a nonsingular exponential kernel—the framework effectively captures memory-dependent and nonlocal characteristics intrinsic to cyber systems,aspects inadequately represented by traditional integer-order models.Under Lipschitz continuity and boundedness assumptions,the existence and uniqueness of solutions are rigorously established via fixed-point theory.We develop a tailored two-step Adams-Bashforth numerical scheme for the CF framework and prove its second-order accuracy.Extensive numerical simulations across various fractional orders reveal that memory effects significantly influence virus transmission and control dynamics;smaller fractional orders produce more pronounced memory effects,delaying both infection spread and antivirus activation.Further theoretical analysis,including Hyers-Ulam stability and sensitivity assessments,reinforces the model’s robustness and identifies key parameters governing virus dynamics.The study also extends the framework to incorporate stochastic effects through a stochastic CF formulation.These results underscore fractional-order modeling as a powerful analytical tool for developing robust and effective cybersecurity strategies. 展开更多
关键词 Caputo-Fabrizio derivative fractional-order computer virus model stochastic fractional dynamics Adams-Bashforth scheme Hyers-Ulam stability sensitivity analysis cyber-epidemiology memory effects nonsingular kernel
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Land use type shapes carbon pathways in Tibetan alpine ecosystems:Characterization of 13C abundance in aggregates and density fractions 认领 引用 被引量：1
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作者 Xin Wan Dangjun Wang +7 位作者 Junya Li Shuaiwen Zhang Linyang Li Minghui He Zhiguo Li Hao Jiang Peng Chen Yi Liu 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第2期448-459,共12页
Insight into the carbon turnover in soil aggregates and density fractions is essential for reducing the uncertainty in estimating carbon pools on the Tibetan Plateau,and how they vary with land use type is unclear.In ... Insight into the carbon turnover in soil aggregates and density fractions is essential for reducing the uncertainty in estimating carbon pools on the Tibetan Plateau,and how they vary with land use type is unclear.In this study,the effect of land use type on carbon storage and fractionation was quantified based on organic carbon and its13C abundance at the microscale of soil aggregates and density fractions in Tibetan alpine ecosystems.The sequence of soil aggregate destruction in the land use types of plantation(13.1%)<shrubland(32.7%)<grassland(47.9%)<farmland(61.8%)shows that plantations strengthen the soil structure.Plantation land had a greater contribution of light fraction organic carbon(28.3%)but a lower contribution of mineral-associated organic carbon(40.6%)to the carbon stock compared to farmland(13.5 and 70.3%).Interestingly,plantation land enhanced the aggregational differentiation of organic carbon and13C in each density fraction,whereas no such phenomenon existed in the soil organic carbon.Carbon isotope analyses revealed that carbon transfer in the plantation land occurred from the light fraction in macroaggregates(–24.9‰)to the mineral-associated fraction in microaggregates(–19.9‰).When compared to the other three land use types,the low transferability of carbon in aggregates and density fractions in plantation land provides a stable carbon pool for the Tibetan Plateau.This study shows that plantations can mitigate global climate change by slowing carbon transfer and increasing carbon storage at the microscale of aggregates and density fractions in alpine regions. 展开更多
关键词 land use type soil aggregate density fractions carbon transfer Tibetan Plateau
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New multisoliton wave solutions in elastic inhomogeneous fractional-order Murnaghan's rod model with stability analysis 认领 引用
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作者 Ananya Tripathy Subhadarshan Sahoo 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2026年第2期269-285,共17页
In this paper,the new solitary wave solutions of the fractional doubly dispersive equation(FDDE)are investigated.These solutions are used in demonstrating wave transmission in elastic inhomogeneous Murnaghan’s rod.A ... In this paper,the new solitary wave solutions of the fractional doubly dispersive equation(FDDE)are investigated.These solutions are used in demonstrating wave transmission in elastic inhomogeneous Murnaghan’s rod.A very effective method,known as the unified method,is used here to obtain these solutions.In different conditions,the obtained solutions exhibit different pulse patterns including bright,periodic,combined bright-dark,two-soliton interaction,three-soliton interaction,five-soliton interaction,w-shaped,m-shaped,and u-shaped solutions.These physical characteristics are thoroughly investigated by the graphical representation under different values of the parameters which shows the reliability and productivity of the proposed method.In addition,linear stability analysis is applied to analyse the stability of the considered model.The novel aspect of this study is that the investigated model has never been studied by using the proposed method,and the resulting solutions have never been accomplished previously. 展开更多
关键词 fractional doubly dispersive equation(FDDE) the uni ed method solitary wave solutions Caputo's fractional derivative stability analysis
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Impact of heart rate related left bundle branch block on instantaneous fractional flow reserve in aged patients 认领 引用
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作者 Gianluca Rigatelli Marco Zuin Emanuele Rigatelli 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2026年第6期379-381,共3页
Interpretation of coronary physiology with fractional flow reserve(FFR)assumes stable relationships between flow,demand,and resistance,but conduction abnormalities such as left bundle branch block(LBBB)can disrupt myo... Interpretation of coronary physiology with fractional flow reserve(FFR)assumes stable relationships between flow,demand,and resistance,but conduction abnormalities such as left bundle branch block(LBBB)can disrupt myocardial activation,perfusion,and pressure-derived ischemic indices especially in aged patients.[1]Heart rate related LBBB is a transient,rate-dependent conduction delay that induces ventricular dyssynchrony and impairs regional perfusion,potentially altering instantaneous FFR(iFFR)accuracy,particularly in the left anterior descending artery or the left circumflex artery disease.[2]Because the physiological impact of heart rate related LBBB is unknown,we investigated its influence on iFFR in aged patients with intermediate stenoses in the left coronary artery. 展开更多
关键词 interpretation coronary physiology fractional flow reserve ffr assumes left bundle branch block lbbb can Heart Rate Left Bundle Branch Block Instantaneous Fractional Flow Reserve Aged Patients ventricular dyssynchrony
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Glucagon-like peptide-1-based incretin agonists in obesity-related heart failure with preserved ejection fraction:A systematic review and meta-analysis 认领 引用
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作者 Ehab Al Mashtoub Ali Hteit +6 位作者 Anthony Bedran Janette Al Banna Charbel El Hachem Nazih Obeid Mostafa Msheik Mohamad Tlais Razan Abdulaal 《World Journal of Meta-Analysis》 2026年第2期44-52,共9页
BACKGROUND Obesity-related heart failure with preserved ejection fraction(HFpEF)is highly prevalent,symptomatically disabling,and lacks clearly disease-modifying pharmacotherapy.Glucagon-like peptide(GLP)-1-based incr... BACKGROUND Obesity-related heart failure with preserved ejection fraction(HFpEF)is highly prevalent,symptomatically disabling,and lacks clearly disease-modifying pharmacotherapy.Glucagon-like peptide(GLP)-1-based incretin agonists-including GLP-1 receptor agonists(GLP-1 RAs;e.g.,semaglutide)and the dual GIP/GLP-1 RA tirzepatide-induce substantial weight loss and favorable cardiometabolic effects and have recently been evaluated in obese HFpEF populations.AIM To systematically evaluate the efficacy and safety of GLP-1–based incretin agonists(including GLP-1 RAs and the dual GIP/GLP-1 RA tirzepatide)in patients with obesity-related HFpEF and to quantify their effects through meta-analysis.METHODS PubMed/MEDLINE,EMBASE,Cochrane CENTRAL,and Web of Science were searched from inception to October 2025 for randomized controlled trials(RCT)evaluating GLP-1–based incretin agonist therapy in adults with HFpEF and obesity.Outcomes included health status[Kansas City Cardiomyopathy Questionnaire clinical summary score(KCCQ-CSS)],body weight,exercise capacity,heart failure events,and safety.Risk of bias was assessed using the Cochrane Risk of Bias 2 tool.Random-effects meta-analyses were performed for KCCQ-CSS and percentage body weight change.RESULTS Three RCTs(n=1876)were included in quantitative synthesis:STEP-HFpEF(n=529),STEP-HFpEF DM(n=616),and SUMMIT(n=731).GLP-1-based incretin agonist therapy significantly improved health status,with a pooled increase in KCCQ-CSS of+7.33 points[95%confidence interval(CI):5.84 to 8.82;I²=0%].Substantial weight loss was observed,with a pooled reduction of-9.56 percentage points(95%CI:-12.15 to-6.97;I²=58%).Tirzepatide significantly reduced the composite of cardiovascular(CV)death or worsening heart failure event(hazard ratio 0.62,95%CI:0.41-0.95;P=0.026),while semaglutide trials demonstrated consistent favorable trends.Across trials,GLP-1-based therapies improved exercise capacity and were associated with fewer serious adverse events,with gastrointestinal symptoms being the most common side effect.CONCLUSION GLP-1-based incretin agonists produce clinically meaningful improvements in symptoms,functional capacity,and body weight in patients with obesity-related HFpEF,with consistent benefit across trials and acceptable safety.Meta-analysis confirms robust improvement in health status and substantial weight reduction,supporting this therapeutic class as a promising disease-modifying strategy for this high-risk HFpEF phenotype.Tirzepatide additionally reduced hard CV outcomes,providing proof of concept that targeting obesity can favorably alter HFpEF disease course. 展开更多
关键词 Heart failure with preserved ejection fraction Obesity-related heart failure with preserved ejection fraction Glucagon-like peptide-1 receptor agonists Dual GIP/GLP-1 receptor agonist Incretin agonists Semaglutide Tirzepatide Weight loss Meta-analysis Systematic review
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Phosphorus fractions of ornithogenic soil profiles in coral islands using P k-edge XANES,sequential extraction,and31P-NMR spectroscopy 认领 引用
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作者 Xianglong Xi Yongli Zhou +5 位作者 Xueying Wang Zhangqin Zheng Yulu Xue Libin Wu Liqiang Xu Xiaodong Liu 《Acta Geochimica》 EI CAS CSCD 2026年第4期1041-1054,共14页
The Xisha Islands accumulated significant amounts of phosphorus(P)due to seabird guano input.However,the seabird population has declined significantly in recent years as a result of climate change and human activities... The Xisha Islands accumulated significant amounts of phosphorus(P)due to seabird guano input.However,the seabird population has declined significantly in recent years as a result of climate change and human activities.As plant communities develop,significant amounts of organic matter and nitrogen were introduced into the soil through plant humus.To investigate the effects of different sources on the distribution of phosphorus fractions during the past~1000 years of ecological evolution,we conducted k-edge x-ray absorption near-edge structural spectroscopy(XANES),sequential extraction,and31P nuclear magnetic resonance(31P-NMR)of soil phosphorus in two ornithogenic soil profiles from the Xisha Islands.Combining these methods,the results revealed that magnesium-bound phosphorus(Mg-P)in modern guano underwent mineralization after deposition,and its content decreased by>50%.Subsequently,it may be released and combine with the abundant calcium-bearing minerals to transform into calcium-bound phosphorus(Ca-P).The results of XANES and sequential extraction indicated that Ca-P dominated the soil phosphorus pool by up to 70%–90%.The distributions of total organic carbon,total nitrogen,and total phosphorus in the soil profile are consistent with the evolutionary characteristics of nutrient supply from guano or plant humus during historical periods.In addition,although plant humus has lower total phosphorus content than guano,it may be an important source of organic phosphorus for topsoil.This study provides insights into the evolution of coral island ecosystems by examining phosphorus fractions and sources of phosphorus and offers valuable references for understanding nutrient cycling on tropical coral islands. 展开更多
关键词 Coral island Soil phosphorus fractions XANES Sequential extraction 31P-NMR
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Prediction of lithium content in typical mountainous clay in Xinjiang,China using fractional derivatives and feature extraction 认领 引用
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作者 JIANG Guo CUI Shichao +6 位作者 CHEN Xi CHEN Xi WANG Jinlin CHEN Tao ZHOU Shuguang ZHANG Zhengfeng XU Xiaozhi 《Journal of Mountain Science》 SCIE CSCD 2026年第2期545-558,共14页
Lithium(Li)is an‘emerging'environmental pollutant,especially in soil,which is a great concern because it can endanger human health through the food chain.Compared with traditional chemical analyses,hyperspectral ... Lithium(Li)is an‘emerging'environmental pollutant,especially in soil,which is a great concern because it can endanger human health through the food chain.Compared with traditional chemical analyses,hyperspectral techniques have achieved many exciting results in soil metal monitoring due to their advantages of being fast and non-destructive.However,insufficient attention has been paid to lithium in soil,and the feasibility of its estimation using hyperspectral techniques needs to be investigated.We studied 97 soil samples from claytype lithium mines in the Ertanggou area of the East Tianshan Mountains of Xinjiang to explore the effects of spectral resolution,fractional order derivatives(FOD),and characteristic band selection on the estimation accuracy of clay Li content,to obtain a fast and effective method for estimating clay Li content.Finally,we developed a new method for rapid and nondestructive estimation of soil lithium content.We have obtained some important results from the study.Spectral resolution exerts a significant impact on model performance,and its reduction usually leads to a decline in model performance.For the full band,the models constructed with low-order derivatives were superior to those with high-order derivatives,and the best model was obtained at the 0.4-order derivative(coefficient of determination(R2)and relative predictive deviation(RPD)of 0.777 and 2.118,respectively).In the characteristic bands,the lower order is sensitive to the visible-near-infrared range,and the higher order is sensitive to the short-wave infrared range,and the model constructed with the higher-order derivatives outperforms the lower-order derivatives.In this study,the combination of FOD and Random Forest(RF)can significantly improve the model performance,with R2,Relative Root Mean Squared Error(RRMSE),and RPD being 0.849,1.526,and 2.574,respectively.Therefore,this research provides a theoretical basis and technical reference for imaging hyperspectral exploration of anomalous areas of clay-type Li resources. 展开更多
关键词 Hyperspectral remote sensing Fractional order Derivatives Random Forest Lithium Soil pollutant
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Nitrogen allocation to biochemical fractions shapes functional traits and N use efficiency in tobacco cultivars 认领 引用
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作者 Guiru ZHAO Shichen LI +4 位作者 Xiaoyao DING Xiaoci PENG Waqar AHMED Shaoming LI Zhengxiong ZHAO 《ENGINEERING Agriculture》 CAS CSCD 2026年第4期233-246,共14页
Nitrogen is essential for plant growth,however,excessive application leads to environmental pollution and increased production costs.Improving nitrogen use efficiency(NUE)is therefore critical for sustainable agricult... Nitrogen is essential for plant growth,however,excessive application leads to environmental pollution and increased production costs.Improving nitrogen use efficiency(NUE)is therefore critical for sustainable agriculture.This study aimed to elucidate how N fractions and functional allocations jointly regulate N accumulation and biomass production in flue-cured tobacco,with a focus on understanding physiological mechanisms underlying cultivar differences.Two contrasting tobacco cultivars,Hongda(higher NUE)and K326(lower NUE),were grown under three N application levels:0 g N per plant(CK),4 g N per plant(T1)and 8 g N per plant(T2).Biomass and N accumulation were monitored across multiple growth stages.N was divided into four solubility fractions:water-soluble(Nw),sodium dodecyl sulfate(SDS)-soluble(Ns),SDS-insoluble(Nin-SDS)and non-protein N.These were then further divided into four functional categories:photosynthetic(Npsn),respiratory(Nresp),structural and storage N.Stepwise regression analysis was used to identify key N components influencing growth.Under N-deficient conditions(CK),greater allocation to Npsn and Nresp supported continued growth.Under moderate N input(T1),increased stem Nin-SDS contributed to leaf biomass accumulation.At high N input(T2),elevated root Nw enhanced total biomass,reducing genotypic differences.N partitioning into distinct functional forms played a central role in regulating biomass production and overall NUE.The superior NUE of tobacco cv.Hongda was associated with its effective N allocation toward physiologically active pools and organs.These findings provide a physiological basis for optimizing N management and breeding tobacco cultivars with reduced fertilizer requirements. 展开更多
关键词 Biomass production functional nitrogen nitrogen fractions nitrogen use efficiency tobacco cultivars
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Developing Long-term Cloud Fraction Records from MODIS Data Considering Diurnal Cycle of Clouds 认领 引用
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作者 SHANG Huazhe XU Ri +12 位作者 WANG Xinying BAO Fangling WEI Lesi ZHAO Yuxin YIN Shuai JI Dabin MA Run SHI Chong WANG Hengqi LEI Yonghui ZHANGTianyu LETU Husi SHI Jiancheng 《Journal of Geodesy and Geoinformation Science》 CSCD 2026年第1期1-10,共10页
Cloud fraction and its diurnal cycle in Qinghai-Xizang Plateau are critical for understanding the variation of radiative budget regionally and globally.Satellite remote sensing is an important tool to develop long-ter... Cloud fraction and its diurnal cycle in Qinghai-Xizang Plateau are critical for understanding the variation of radiative budget regionally and globally.Satellite remote sensing is an important tool to develop long-term cloud datasets for climate research.However,the daily cloud records built from polar-orbiting sensors,e.g.,MODIS,lack consideration of cloud diurnal cycle.This study assesses the uncertainties regarding the absence of diurnal cycles,and further develops a daily cloud fraction algorithm for MODIS to reduce such uncertainty.It is found that the deep learning model can take inputs directly from MODIS infrared bands’brightness temperature and project the daily cloud fraction that include consideration of cloud diurnal cycles.The evaluation indicates that the uncertainties of the new product with respect to its limited observing frequencies have been reduced 8%∼20%.This study sheds light on a simple yet effective way to mitigate the diurnal-cycle-induced-uncertainties in generating other polar-orbiting sensors’cloud properties. 展开更多
关键词 cloud fraction diurnal cycle Modis Qinghai-Xizang Plateau Himawari-8
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Predictive value of bedside ultrasound-assessed left ventricular ejection fraction for neurological prognosis in patients after return of spontaneous circulation following in-hospital cardiac arrest:a retrospective cohort study 认领 引用
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作者 Zhitao Zhong Xia Gao +4 位作者 Xia Huang Yan Ren Yong Chen Changbin Luo Ping Xu 《Emergency and Critical Care Medicine》 2026年第2期88-94,共7页
Background:Poor neurological recovery after in-hospital cardiac arrest(IHCA)may be exacerbated by postresuscitation myocardial dysfunction.However,the predictive value of left ventricular ejection fraction(LVEF)for ne... Background:Poor neurological recovery after in-hospital cardiac arrest(IHCA)may be exacerbated by postresuscitation myocardial dysfunction.However,the predictive value of left ventricular ejection fraction(LVEF)for neurological outcomes remains insufficiently explored.Methods:This retrospective study included patients with IHCA who achieved return of spontaneous circulation at the Zigong Fourth People's Hospital between 2019 and 2024.Neurological function at discharge was evaluated using the cerebral performance category(CPC)score(favorable:CPC≤2;unfavorable:CPC>2).Multivariable logistic regression,restricted cubic splines,and receiver operating characteristic curves were used to evaluate the predictive performance.The incremental value of LVEF was assessed using net reclassification improvement and integrated discrimination improvement.Decision and calibration curves were used to assess clinical utility.Results:Of the 179 patients,31(17.3%)exhibited favorable neurological outcomes.After adjusting for mechanical ventilation and consciousness levels,LVEF remained an independent predictor of favorable recovery(odds ratio:1.057;95%confidence interval[CI]:1.005-1.112;P=0.032).Restricted cubic splines analysis demonstrated a linear dose-response relation between LVEF and favorable outcomes(P for nonlinearity=0.984).The integrated model incorporating LVEF,cardiac arrest survival postresuscitation in-hospital,and modified early warning score yielded an area under the curve of 0.869(95%Cl:0.803-0.935).Bootstrap analysis identified an optimal LVEF threshold of 58%(95%Cl:55%-65%).The addition of LVEF to conventional scoring systems improved both the net reclassification improvement and integrated discrimination improvement(P<0.05),with the decision curve analysis confirming an enhanced net clinical benefit.Calibration curves showed good agreement between the predicted and observed outcomes.Conclusion:Bedside ultrasonographic assessment of LVEF is an independent linear predictor of neurological recovery in patients with IHCA.Incorporating LVEF into existing clinical frameworks(cardiac arrest survival postresuscitation in-hospital and modified early warning score)enhances the prognostic accuracy and risk stratification,providing objective evidence for early clinical decisionmaking. 展开更多
关键词 In-hospital cardiac arrest Left ventricular ejection fraction Neurological prognosis Point of care ultrasound Predictive value
GLOBAL SOLUTION TO THE 3D ANISOTROPIC INCOMPRESSIBLE MHD SYSTEM WITH PARTIAL AND FRACTIONAL DISSIPATION 认领 引用
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作者 Yanping ZHOU Pingping GUI Huiyang SONG 《Acta Mathematica Scientia》 SCIE CSCD 2026年第3期1387-1404,共18页
This paper focuses on the stability of the 3D anisotropic incompressible magnetohydrodynamic(MHD)system with partial and fractional dissipation near a background magnetic field.We obtain the global well-posedness of t... This paper focuses on the stability of the 3D anisotropic incompressible magnetohydrodynamic(MHD)system with partial and fractional dissipation near a background magnetic field.We obtain the global well-posedness of the solutions,provided that the H2(R3)norm of initial datum is sufficiently small.Due to the emergence of fractional dissipation,some conventional energy estimate methods are no longer applicable.To overcome this challenge,we establish new fractional anisotropic inequalities,which play a crucial role in bounding the nonlinear terms by the dissipative parts.Our result extends some existing conclusions. 展开更多
关键词 3D MHD system partial and fractional dissipation stability
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Developments in the applications of density functional theory to fractional quantum Hall systems 认领 引用
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作者 Yi Yang Yayun Hu Zi-Xiang Hu 《Communications in Theoretical Physics》 SCIE CAS CSCD 2026年第2期220-230,共11页
The fractional quantum Hall effect remains a captivating area in condensed matter physics,characterized by strongly correlated topological order,which manifests as fractionalized excitations and anyonic statistics.Num... The fractional quantum Hall effect remains a captivating area in condensed matter physics,characterized by strongly correlated topological order,which manifests as fractionalized excitations and anyonic statistics.Numerical simulations,such as exact diagonalization,density matrix renormalization groups,matrix product states,and Monte Carlo methods are essential for examining the properties of strongly correlated systems.Recently,density functional theory has been employed in this field within the framework of composite fermion theory.This paper systematically evaluates how density functional theory approaches have addressed fundamental challenges in fractional quantum Hall systems,including ground state and low-energy excitations.Special attention is given to the insights provided by density functional theory regarding composite fermion behavior,edge effects,and the nature of fractional charge and magnetoroton excitations.The discussion critically examines both the advantages and limitations of these approaches,while highlighting the productive interplay between numerical simulations and theoretical models.Future directions are explored,particularly the promising potential of time-dependent density functional theory for modeling non-equilibrium dynamics in quantum Hall systems. 展开更多
关键词 composite fermions fractional quantum Hall effect density functional theory lowlying excitations topological physics
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Numerical Solution of Conformable Stochastic Differential Equations Driven by Fractional Brownian Motion 认领 引用
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作者 CHEN Yinmeng XIA Xiaoyu YAN Litan 《应用数学》 北大核心 2026年第3期880-886,共7页
This paper investigates numerical solutions for stochastic fractional differential equations driven by fractional Brownian motion.We develop an approximation scheme for the fractional noise term and establish a corres... This paper investigates numerical solutions for stochastic fractional differential equations driven by fractional Brownian motion.We develop an approximation scheme for the fractional noise term and establish a corresponding numerical method.The theoretical analysis includes proving the stability of the numerical solution and its convergence to the exact solution.Numerical experiments implement the Jacobi method to simulate a conformable stochastic differential equation,demonstrating the method's performance through solution behavior and error distribution analysis. 展开更多
关键词 Stochastic fractional differential equation Fractional Brownian motion Numerical solution Jacobi spectral Galerkin method
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Molecular composition of water soluble fraction of petroleum products and crude oils:Insights into groundwater contamination potential and environmental forensics 认领 引用 被引量：2
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作者 Wang Yu Yuruo Wan +3 位作者 Wei Zhou Jiayi An Liting Tian Jie Ma 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第1期437-444,共8页
Petroleum leakage is a major groundwater contamination source,with chemical composition of water soluble fractions(WSFs)from diverse oil sources significantly impacting groundwater quality and source identification.Th... Petroleum leakage is a major groundwater contamination source,with chemical composition of water soluble fractions(WSFs)from diverse oil sources significantly impacting groundwater quality and source identification.The aim of this study was to assess impact of 15 diverse oils on groundwater quality and environmental forensics based on oil-water equilibrium experiments.Our results indicate that contamination of groundwater by gasoline and naphtha is primarily attributed to volatile hydrocarbons,while pollution from diesel,kerosene,and crude oil is predominantly from non-hydrocarbons.Rapid determination of the extent of non-hydrocarbon pollution in WSFs was achieved through a new quantitative index.Gasoline and naphtha exhibited the highest groundwater contamination potential while kerosene and light crude oils were also likely to cause groundwater contamina-tion.Although volatile hydrocarbons in the WSFs of diesel and jet fuel do not easily exceed current regulatory standards,unregulated non-hydrocarbons may pose a more severe contamination risk to groundwater.Notably,the presence of significant benzene and toluene,hydrogenation and alkylation products(e.g.,C4-C5 alkylben-zenes,alkylindenes,alkyltetralins,and dihydro-indenes),cycloalkanes in WSFs can effectively be utilized for preliminary source identification of light distillates,middle distillates,and crude oils,respectively. 展开更多
关键词 Petroleum hydrocarbons Water soluble fraction Contaminated sites Groundwater contamination Source identification
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Semaglutide in patients with obesity and heart failure with preserved ejection fraction:A systematic review and meta-analysis 认领 引用 被引量：1
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作者 Maneeth Mylavarapu Ogechukwu Obi +8 位作者 Yozahandy Abarca Husna Fatima Prarath Roshni Noor Ul Huda Yuliya Lysak Asad Gandapur Samantha Contreras Vazquez Muhammad Areeb Siddiqui Adetola Mowo-Wale 《World Journal of Cardiology》 2026年第3期123-133,共11页
BACKGROUND Obesity-related heart failure in patients is often associated with a high symptom burden.However,no treatments have been proven to specifically target obesity-related heart failure with preserved ejection f... BACKGROUND Obesity-related heart failure in patients is often associated with a high symptom burden.However,no treatments have been proven to specifically target obesity-related heart failure with preserved ejection fraction(HFpEF).AIM To evaluate the efficacy of semaglutide in patients with obesity and HFpEF.METHODS Per the PRISMA guidelines,studies reporting clinical outcomes of semaglutide in patients with obesity and HFpEF were included.The outcomes included percentage weight change and adjudicated heart failure events.Both random and common effects models were used for the data analysis.The random intercept logistic regression model was used to compute the proportions,and the Peto method was used to compute the odds ratios(OR).A P≤0.05 was considered significant.RESULTS In total,three studies with 1463 patients with obesity and HFpEF were included in the study.The mean age of the patients was 68.8±3.47 years.50.7%of the patients were females.Patients who received semaglutide had statistically higher odds of achieving 10%(OR=6.35;95%CI:1.54-26.21;P<0.00001)and 15%(OR=9.44;95%CI:2.91-30.60;P<0.0001)weight reductions compared to those who received placebo.Additionally,patients who received semaglutide had lower odds of adjudicated heart failure event(OR=0.29;95%CI:0.14-0.58;P=0.0005)when compared to patients on placebo.CONCLUSION Our study demonstrates that semaglutide is significantly effective in reducing weight and potentially lowering the risk of heart failure events.This suggests that semaglutide could be a promising therapeutic option for managing obesity-related HFpEF. 展开更多
关键词 Semaglutide Heart failure with preserved ejection fraction Obesity Weight-loss Glucagon-like peptide-1 receptor agonists Meta-analysis
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Mapping Properties for Fractional Integral Related to Schrödinger Operator on Generalized Fractional Mixed Morrey Spaces 认领 引用
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作者 Zhuanxia Cheng Yanqi Yang 《Journal of Applied Mathematics and Physics》 2026年第1期258-271,共14页
This paper establishes the boundedness of fractional integral operators associated with Schrödinger operators and their commutators with BMOθ(ρ)functions on generalized fractional mixed Morrey spaces.This is... This paper establishes the boundedness of fractional integral operators associated with Schrödinger operators and their commutators with BMOθ(ρ)functions on generalized fractional mixed Morrey spaces.This is achieved by employing function decomposition and stratification techniques in these spaces,while drawing on known boundedness results in the context of mixed Lebesgue spaces. 展开更多
关键词 Schrödinger Operator Fractional Integral Generalized Fractional Mixed Morrey Space Commutator Boundedness
Barium transport and isotopic fractionation in plants 认领 引用
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作者 Shuming Xu Congcong Cao +5 位作者 Chao Xiong Hairun Wang Ziqian Qiao Kai Li Yingzeng Gong Huimin Yu 《Acta Geochimica》 EI CAS CSCD 2026年第2期331-341,共11页
Excess barium(Ba)in soil can result in Ba overenrichment in crops,which may adversely affect human health.However,the transport and isotopic fractionation of Ba in plants remain poorly understood.We analyzed the Ba co... Excess barium(Ba)in soil can result in Ba overenrichment in crops,which may adversely affect human health.However,the transport and isotopic fractionation of Ba in plants remain poorly understood.We analyzed the Ba content and isotopic composition of three crops(rice,pak choi,and maize)grown in Ba-contaminated soil.Results for rice and maize demonstrated significant fractionation and environmental sensitivity in the transport of Ba,and longer flooding durations were found to increase Ba accumulation in rice grains during the filling stage.In contrast,research on pak choi revealed limited fractionation and strong uptake and transport of Ba.The estimated daily intake of Ba in the edible portion of pak choi(stems and leaves)was 15-24times the recommended daily intake of 0.2 mg/kg body weight per day.Therefore,pak choi was the least suitable crop for Ba-contaminated areas.This study provides new insights into how Ba isotopic fractionation can trace Ba transport in crops,offering practical applications for food safety and environmental monitoring. 展开更多
关键词 Barium pollution Plant Health risks Barium isotopes Fractionation
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Chemical fertilizer and liming-induced changes in aluminum,iron oxides and soil organic carbon fractions:Implications for carbon sequestration in an upland red soil 认领 引用
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作者 Mahmoud Abdelaziz Zhe Shen +9 位作者 Dongchu Li Lu Zhang Dong Ai Jun Yan Kiya Adare Tadesse Imtiaz Ahmed Chu Zhang Chunhong Wu Jiwen Li Huimin Zhang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第8期3412-3426,共15页
Lime application represents an established approach for ameliorating soil acidity,and understanding its effects on the interactions between aluminum(Al)and iron(Fe)oxides and soil organic carbon(SOC)fractions is essen... Lime application represents an established approach for ameliorating soil acidity,and understanding its effects on the interactions between aluminum(Al)and iron(Fe)oxides and soil organic carbon(SOC)fractions is essential for promoting sustainable agricultural practices that enhance carbon sequestration.This investigation examined the interactions among Al and Fe oxides and SOC fractions under long-term fertilization and liming.A long-term field experiment was implemented with five treatments:CK(no fertilizer),N(nitrogen fertilizer),NCa(N plus lime),NPK(nitrogen,phosphorus,and potassium fertilizer),and NPKCa(NPK plus lime).Soil samples were obtained from three depths:0-10,10-20,and 20-30 cm.The findings revealed that lime application increased SOC by 20.84%under the N treatment but decreased SOC by 9.97%under NPK.At the 0-10 cm depth,dissolved organic carbon(DOC)was substantially higher under NCa(410.51 mg kg-1)and NPKCa(372.83 mg kg-1)compared with CK.Particulate organic carbon(POC)and mineral-associated organic carbon(MAOC)demonstrated consistent enhancement under NPK and NPKCa across all soil depths compared with CK.DOC exhibited significant positive correlations with both aluminum(Ald),reactive aluminum(Alo)and aluminum(Alp),indicating a key role of organically bound and reactive Al in carbon dynamics.Compared to the CK treatment,SOC stock increased significantly by 43.49%under NPK and by 36.82%under NPKCa.Structural equation modeling demonstrated that lime application mitigated the negative effects of free Al(Ald)on carbon sequestration,while Fe oxides(Fed)contributed positively to SOC stabilization.DOC showed no significant impact on carbon sequestration rate(CSR),while easily oxidizable carbon(EOC)negatively affected CSR directly.These results highlight the crucial role of lime in improving acidic soil conditions and enhancing the stability and sequestration of soil organic carbon. 展开更多
关键词 nitrogen fertilizer lime carbon fraction carbon sequestration aluminum and iron oxide
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Fractional Discrete-Time Analysis of an Emotional Model Built on a Chaotic Map through the Set of Equilibrium and Fixed Points 认领 引用 被引量：1
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作者 Shaher Momani Rabha W.Ibrahim Yeliz Karaca 《Computer Modeling in Engineering & Sciences》 SCIE EI 2025年第4期809-826,共18页
Fractional discrete systems can enable the modeling and control of the complicated processes more adaptable through the concept of versatility by providing systemdynamics’descriptions withmore degrees of freedom.Nume... Fractional discrete systems can enable the modeling and control of the complicated processes more adaptable through the concept of versatility by providing systemdynamics’descriptions withmore degrees of freedom.Numerical approaches have become necessary and sufficient to be addressed and employed for benefiting from the adaptability of such systems for varied applications.A variety of fractional Layla and Majnun model(LMM)system kinds has been proposed in the current work where some of these systems’key behaviors are addressed.In addition,the necessary and sufficient conditions for the stability and asymptotic stability of the fractional dynamic systems are investigated,as a result of which,the necessary requirements of the LMM to achieve constant and asymptotically steady zero resolutions are provided.As a special case,when Layla and Majnun have equal feelings,we propose an analysis of the system in view of its equilibrium and fixed point sets.Considering that the system has marginal stability if its eigenvalues have both negative and zero real portions,it is demonstrated that the system neither converges nor diverges to a steady trajectory or equilibrium point.It,rather,continues to hover along the line separating stability and instability based on the fractional LMM system. 展开更多
关键词 Fractional difference system fractional differential operators fractional calculus chaotic map equilibrium fixed point sets nyquist plot routh-Hurwitz criterion
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