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Differential metabolites facilitate metabolic dysfunction-associated fatty liver disease malignancy via immune evasion and M2-polarized macrophages 认领 引用
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作者 Jie Yang Wen-Li Sai +5 位作者 Xiao-Xiao Xia Hao Tang Min Xu Qun Xie Deng-Fu Yao Min Yao 《World Journal of Gastroenterology》 SCIE CAS 2026年第24期97-116,共20页
BACKGROUND Differential metabolites(DMs)are associated with metabolic dysfunction-associated fatty liver disease(MAFLD)malignant transformation.However,their underlying mechanisms remain to be identified.AIM To invest... BACKGROUND Differential metabolites(DMs)are associated with metabolic dysfunction-associated fatty liver disease(MAFLD)malignant transformation.However,their underlying mechanisms remain to be identified.AIM To investigate the dynamic alterations of DMs,carnitine palmitoyl transferase-II(CPT-II)and immune cells during MAFLD malignancy.METHODS A rat model was constructed with high fat diet plus 2-fluorenylacetamide to induce hepatocyte malignancy.Livers were divided into MAFLD,metabolic dysfunction-associated steatohepatitis,liver cirrhosis(LC)and hepatocellular carcinoma(HCC)groups based on hematoxylin and eosin staining,with normal rats as control.DMs were identified via RNA transcriptomics or metabolomics.Proteins were detected by western blotting,and immune cells were analyzed by single-cell sequencing.RESULTS Model livers with obvious lipid accumulation and cells were examined during MAFLD malignancy from inflammation or necrosis to LC or HCC and exhibited a pathological alteration of nuclear pleomorphism,disordered arrangement and a progressive decrease in CPT-II activity.The number of DMs was 131 in MAFLD,134 in metabolic dysfunction-associated steatohepatitis,27 in liver fibrosis/LC,and 130 in HCC,respectively.Cyclin B1 and cyclin-dependent kinase 1 were involved in the P53 pathway and cell cycle,and they held key positions in the protein interaction network,which involved metabolic regulation of cell response to stimuli.DMs,such as phosphatidylcholine or sphingomyelin in steroid biosynthesis,were significantly related to MAFLD malignancy.Mechanistically,liver immune cells undergo dynamic changes in a fat-rich microenvironment,with decreased T cell abundance and increased programmed death ligand 1 expression and M2-polarized macrophages.CONCLUSION Downregulated CPT-II aggravates the accumulation of metabolites associated with MAFLD malignancy via immune evasion and M2-polarized macrophages. 展开更多
关键词 Differential metabolites Carnitine palmitoyl transferase-II Immune escape Differentially expressed genes M2-polarized macrophages Hepatocarcinogenesis
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Massively parallel and programmable photonic differential equation solver 认领 引用
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作者 Jiahao Wang Wen Chen +8 位作者 Zhou Zhou Dongyu Hu Zile Li Peng Chen Yan-qing Lu Shuang Zhang Cheng-Wei Qiu Shaohua Yu Guoxing Zheng 《Opto-Electronic Advances》 SCIE EI CAS CSCD 2026年第5期3-13,共11页
Calculus equations are fundamental mathematical tools,whose numerical solution is crucial.Existing solvers with optical analog computing struggle to simultaneously integrate programmability and parallel processing,thu... Calculus equations are fundamental mathematical tools,whose numerical solution is crucial.Existing solvers with optical analog computing struggle to simultaneously integrate programmability and parallel processing,thus constraining computational speed and density.Herein,we propose a reconfigurable all-optical platform capable of solving variable-coefficient first-order ordinary differential equations in parallel.We utilize the electrically tunable liquid crystals(LCs)as computing kernels to address these equations.The solver's applicability to canonical scientific problems,such as heat conduction and resistor-capacitor circuit dynamics,is further showcased with simultaneous solving of 158 equations with only one single forward propagation of light.Experimental results confirm the efficacy of the platform in solving equations in an ultra-fast,reconfigurable,broadband,and parallel manner. 展开更多
关键词 photonics computing ordinary differential equations photonic differential equation solver
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Differential accumulation mechanism of shale gas in superimposed basins:Insights from dynamic evolution of shale gas content and occurrence state 认领 引用 被引量：1
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作者 Min Li Xiongqi Pang +6 位作者 Zhen Zhao Xin Ye Di Chen Pengwei Wang Chengxiang Wan Guanping Wang Xiaotong Ge 《Energy Geoscience》 EI CAS CSCD 2026年第1期55-71,共17页
By investigating the evolution of shale gas generation,storage,adjustment and accumulation under different structural settings in superimposed basins,this study elucidates the differential accumulation mechanisms of s... By investigating the evolution of shale gas generation,storage,adjustment and accumulation under different structural settings in superimposed basins,this study elucidates the differential accumulation mechanisms of shale gas.An improved evaluation method of shale gas content evolution in superimposed basins is proposed.This method incorporates the coupling effect of key geological factors such as temperature,pressure,organic matter abundance,maturity,and pore characteristics on the content and occurrence state of shale gas,as well as the configuration relationship between shale gas generation and storage throughout geological history.Using this approach,the gas evolution histories of the Longmaxi Formation shales in wells N201 and PY1 are reconstructed under varying geological conditions.The Longmaxi Formation shales in these wells are dominated by typeⅠkerogen,with original total organic carbon(TOCo)contents of 6.20 wt% and 4.92 wt%,respectively,indicating differences in the initial material basis for gas generation.At the maximum burial depth of approximately 5000 m,the Longmaxi Formation shale in well N201 exhibits a formation pressure coefficient of 2.05,an organic matter maturity of 2.2%,and organic pores accounting for 68%of the total porosity.The gas generation quantity(Qg)reaches 19.24 m3,while the gas storage capacity(Qs)is 4.30 m3.The actual total gas content(Qa),constrained by Qs,is 4.30 m3,with free gas comprising 94%.Following relatively moderate tectonic uplift,the Qa in well N201 decreases to 4.03 m3,with free gas accounting for 63%.In contrast,the Longmaxi Formation shale in well PY1 reached a maximum burial depth of 6300 m,associated with a formation pressure coefficient of 1.62,organic matter maturity of 2.5%,and organic pore proportion of 67%.Here,Qg is 16.87 m3,and both Qs and Qa are 3.65 m3,with free gas accounting for 98%.After intense tectonic uplift,Qa declines to 2.72 m3,and the proportion of free gas drops to51%.Finally,a four-stage differential accumulation model of shale gas is established:Slow gas generation and only adsorbed gas occur in stageⅠ,which is primarily controlled by TOC content;both adsorbed gas and free gas present in stageⅡ,with free gas becoming dominant;rapid gas generation and free gas predominance are controlled by temperature and porosity in stageⅢ;and gas adjustment and accumulation are primarily controlled by temperature and pressure in stageⅣ. 展开更多
关键词 Differential enrichment of shale gas Gas content evolution Free gas Tectonic uplifting Superimposed basin
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High‑Performance Differential Imaging via Reconfigurable Black Phosphorus p-n Homojunction Optoelectronics 认领 引用
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作者 Rui Hao Lili Luo +6 位作者 Lu Yang Xue Yang Fengsong Gao Meijie Zhu Yingtao Li Qingliang Feng Zemin Zhang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第8期205-214,共10页
The advancement of differential imaging and adaptive machine vision demands hardware capable of dynamic signal modulation,yet traditional photodetectors are limited by static doping profiles and fixed junction polarit... The advancement of differential imaging and adaptive machine vision demands hardware capable of dynamic signal modulation,yet traditional photodetectors are limited by static doping profiles and fixed junction polarities.To overcome this bottleneck,we present a reconfigurable black phosphorus(BP)p-n homojunction photodetector engineered via in situ ferroelectric domain programming.By leveraging the non-volatile ferroelectric field of a bismuth ferrite substrate,we achieve precise,nondestructive modulation of the BP band structure,allowing for reversible switching between p-n and n-p configurations within a single device channel.This ferroelectric doping strategy effectively eliminates interface damage associated with ion implantation while enabling programmable rectification behaviors.The device demonstrates self-powered operation with a responsivity of 44 mA W−1 at 808 nm under zero-bias conditions.Crucially,we demonstrate a single-pixel imaging prototype where the reconfigurable junction polarity enables tunable edge sharpness and high-fidelity image reconstruction.This work establishes a paradigm for ferroelectrically programmable 2D devices,providing a versatile platform for differential imaging and contrast-enhancement optoelectronic applications. 展开更多
关键词 Ferroelectric Reconfigurable Black phosphorus BiFeO3 Differential imaging
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Collaborative optimization of well operations and adjustment strategies in waterflooding reservoirs using an enhanced adaptive differential evolution algorithm 认领 引用
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作者 Xian-Min Zhang Jian-Gang Yang +2 位作者 Qi-Hong Feng Ya-Wei Hou Lei Zhang 《Petroleum Science》 SCIE EI CAS CSCD 2026年第5期2735-2757,共23页
Efficient optimization of well operations andadjustment strategies in large-scale waterflooding reservoirs is a high-dimensional and complex challenge due to strong decision coupling and reservoir heterogeneity.This s... Efficient optimization of well operations andadjustment strategies in large-scale waterflooding reservoirs is a high-dimensional and complex challenge due to strong decision coupling and reservoir heterogeneity.This study proposes a collaborative optimization framework that integrates multiple adjustment strategies,includinginfillwell drilling,shut-in of low-efficiency wells,and injectionproduction well conversion.A penalty mechanism is introduced tobalance cumulative oil production maximization with minimum production constraints for infill wells.The core contribution is the development of a multi-strategy enhancedadaptive differential evolution algorithm(E-ADE),which incorporates the follower update mechanism of the SparrowSearch Algorithm(SSA)and the logarithmic spiral search strategy of the Whale Optimization Algorithm(WOA)into the differential evolution(DE)framework.By dynamically adjusting differential evolution vectors and adaptively regulating population size across optimization stages,E-ADE effectively balances global exploration and local exploitation,leading to significantlyimproved convergence speed and optimization accuracy.Benchmark tests on nine multimodalfunctions demonstrate that E-ADEconsistently outperforms classical algorithms,includingDE,GA,PSO,WOA,and SSA.The method is further applied to the PUNQ-S3 reservoir model and the S4 block of the W12-2 oilfield under high water-cut conditions.The results indicate that E-ADE enables adaptive optimization of infillwell placement,shut-in schemes,and welltype conversions,achieving coordinated improvements in both field-scale production andsingle-well performance,and substantially enhancing the efficiency of waterflooding development. 展开更多
关键词 Waterflooding reservoir Collaborative optimization Enhanced adaptive differential evolution algorithm Logarithmic spiral search Shannon entropy
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Two-phase differential game guidance scheme against active defensive aircraft in three-body engagement 认领 引用
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作者 Xintao WANG Tao CHAO +2 位作者 Mingzhe HOU Songyan WANG Ming YANG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第3期530-545,共16页
This paper proposes a two-phase game guidance strategy for the three-body confrontation scenario according to the linear quadratic differential game method,which includes an Attacker,an Interceptor,and a Target.The in... This paper proposes a two-phase game guidance strategy for the three-body confrontation scenario according to the linear quadratic differential game method,which includes an Attacker,an Interceptor,and a Target.The interception probabilities between the Attacker and the Interceptor-Target team are estimated using the probability density function.The desired zero-effort miss distances associated with the interception probabilities for the three-body conflict are acquired by virtue of the gradient descent method.The game combat is divided into two phases by introducing the switching time.In Phase 1,a differential game strategy is developed to guide the zero-control miss distance between the Attacker and the Interceptor-Target into the desired position,which guarantees that the Attacker has the maximizing probability of intercepting the Target and the minimizing probability of being captured by the Interceptor.In Phase 2,a differential game guidance strategy is proposed to ensure that the Attacker evades the pursuit of the Interceptor and intercepts the Target at the preset impact angle.Finally,numerical simulation verifies the effectiveness of the two-stage game guidance strategy. 展开更多
关键词 Active defensive aircraft Differential game Guidance law Three-body engagement Two-phase guidance
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Coexistence of room-temperature negative differential resistance and unsaturated magnetoresistance effects in germanium-based devices 认领 引用
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作者 Xiong He Ling Cai +3 位作者 Li-Zhi Yi Guang-Duo Lu Li-Qing Pan Zhi-Gang Sun 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第3期483-492,共10页
We demonstrate room-temperature negative differential resistance(NDR)and unsaturated magnetoresistance(MR)effects in germanium-based devices.Our findings indicate that the observed NDR primarily originates from the ca... We demonstrate room-temperature negative differential resistance(NDR)and unsaturated magnetoresistance(MR)effects in germanium-based devices.Our findings indicate that the observed NDR primarily originates from the carrier injection effect induced by local impact ionization in germanium.As the magnetic field increases,the MR values exhibit an unsaturated behavior,increasing quadratically at low fields and transitioning to a linear increase at higher fields,reaching approximately 91%at 1 T.We attribute this large unsaturated MR to carrier inhomogeneity.The equivalent Hall electric field strength was used to characterize the degree of carrier inhomogeneity under magnetic fields:a larger equivalent Hall electric field strength indicates stronger carrier inhomogeneity and consequently a larger corresponding MR.The coexistence of excellent room-temperature NDR and large unsaturated MR in germanium-based devices(achieved by constructing electrodes at two edge positions on the semiconductor surface)enables the development of multifunctional devices. 展开更多
关键词 germanium-based devices magnetoresistance negative differential resistance electrical transport
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Dual-modal trajectory planning method for compound-wing UAV leveraging differential flatness in urban environments 认领 引用
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作者 Teng Long Zhenlin Zhou +3 位作者 Jingliang Sun Junzhi Li Zihan Wang Dawei Liu 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第6期50-63,共14页
The rise of the low-altitude economy highlights the importance of compound-wing UAVs.However,achieving seamless and optimal trajectories across different flight modes remains a significant challenge due to inherent hi... The rise of the low-altitude economy highlights the importance of compound-wing UAVs.However,achieving seamless and optimal trajectories across different flight modes remains a significant challenge due to inherent high-order discontinuities during mode transitions.To address this limitation,the Spatial-Temporal Adaptive Dual-modal Trajectory Planning(STA-DTP)method for compound-wing UAVs is proposed.By leveraging the differential flatness characteristics of the compound-wing UAV's dual-modal dynamics,a Dynamic collocation-point-based Minimum Control Effort Polynomial(DMINCO)trajectory parameterization model is developed.Its polynomial design ensures high-order continuity and allows for decoupled spatial-temporal representation of dual-modal trajectories,significantly reducing optimization complexity.An adaptive collocation-point decision mechanism for dual-modal transition is designed to address the dependence of trajectory optimality on transition timing.Integrated with an Anytime framework,this mechanism facilitates the real-time generation of feasible dual-modal flight trajectories.Transition collocation points are adaptively assigned based on conflicts between trajectory states and dynamic constraints.Under available computational resources,trajectory optimality is progressively enhanced through the densification collocation-point strategy.Compared with typical trajectory planning algorithms(i.e.,STA-DTP,SFC-SCP,and GPOPS-II)using fixed transition-point strategies,simulation results demonstrate that the proposed method achieves improvements of 1–2 orders of magnitude in planning efficiency and reduces trajectory flight durations as well.Consequently,this work provides an efficient and optimal framework for trajectory planning of compound-wing UAVs in urban environments. 展开更多
关键词 Compound-wing UAV Dual-modal trajectory planning Differential flatness Anytime framework
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Personalized Differential Privacy Graph Neural Network 认领 引用
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作者 Yanli Yuan Dian Lei +3 位作者 Chuan Zhang Zehui Xiong Chunhai Li Liehuang Zhu 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2026年第2期498-500,共3页
Dear Editor,This letter addresses the critical challenge of preserving privacy in graph learning without compromising on data utility.Differential privacy(DP)is emerging as an effective method for privacy-preserving g... Dear Editor,This letter addresses the critical challenge of preserving privacy in graph learning without compromising on data utility.Differential privacy(DP)is emerging as an effective method for privacy-preserving graph learning.However,its application often diminishes data utility,especially for nodes with fewer neighbors in graph neural networks(GNNs). 展开更多
关键词 graph neural networks gnns personalized differential privacy graph learning privacy preservation data utility preserving privacy graph neural network
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Prediction of laser welding deformation using a deep learning model optimized by a differential evolution algorithm 认领 引用
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作者 Lihong Cheng Yue Li +2 位作者 Jianfeng Wang Chao Ma Xiaohong Zhan 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2026年第1期236-248,共13页
Welding deformation adversely affects the quality and precision of structural components,and traditional methods require significant material resources and time.Machine learning has demonstrated exceptional ac-curacy ... Welding deformation adversely affects the quality and precision of structural components,and traditional methods require significant material resources and time.Machine learning has demonstrated exceptional ac-curacy and efficiency in solving complex problems.Thus,the use of machine learning to predict welding de-formations is a novel approach.In this study,laser welding experiments were conducted on a TC4 titanium alloy to establish a welding deformation dataset.The deep neural network(DNN)and convolutional neural network(CNN)models were designed and constructed,with average prediction errors of 0.85 mm and 0.94 mm on the validation set,respectively.To further optimize the network parameters,a differential evolution algorithm was employed through mutation,crossover,and selection.The results indicated that after optimization,the pre-diction errors of the DNN and CNN models reduced to 0.75 mm and 0.85 mm,respectively.These represent accuracy improvements of 14.8%and 9.6%,respectively.The optimized models exhibited superior predictive performances for the validation set. 展开更多
关键词 Deep learning Differential evolution algorithm Laser welding deformation Ti6Al4V alloy
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Analytical modeling of anisotropic-strength differential hardening with low strength under plane strain tension for WE43 alloy 认领 引用
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作者 Pengfei Wu Qiang Chen +1 位作者 Dianyin Hu Yanshan Lou 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第5期347-365,共19页
Accurately characterizing the evolution characteristic of hardening behavior is helpful for the design of metal forming processes.To depict the direction-and stress state-related evolving characteristic,the study prop... Accurately characterizing the evolution characteristic of hardening behavior is helpful for the design of metal forming processes.To depict the direction-and stress state-related evolving characteristic,the study proposes an anisotropicstrength differential(SD)hardening model with the form of the first stress invariant,third deviatoric stress invariant,and nonquadratic Hershy-Hosford function.The material parameters can be analytically determined by four hardening curves under the typical stress states.Through adopting a geometry-inspired numerical convex analysis approach,the limits of the convexityrelated parameters are efficiently computed to present the determined convexity domain.The established SD hardening model is employed to explain the deformation history-related hardening behavior of WE43 alloy under various stress states.These predicted results have a high consistency with the actual yield stresses.The proposed yield function shows a higher superiority than the existing model in the aspect of characterizing the low strength under plane strain tension(PST).The SD hardening model is extended to the anisotropic form under non-associated flow rule,where the Hill48 yield function is utilized as the plastic potential function.The predicted results indicate that the established model can accurately capture the anisotropic and SD effects of WE43 alloy.This implies the tremendous potential to model the anisotropic-SD hardening performance with low strength under PST for other materials. 展开更多
关键词 Magnesium-rare earth alloy Anisotropic hardening Strength differential effect Non-associated flow rule Metal forming
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Optimizing differential travel-time measurements with dynamic time warping 认领 引用
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作者 LIU Jian-xin NIE Zi-ting +1 位作者 HOU Xin-rong GAO Da-wei 《Journal of Central South University》 SCIE EI CAS CSCD 2026年第2期834-846,共13页
Precise differential travel-time measurement is essential for earthquake relative locating.The waveform cross correlation(WCC)technique is widely regarded as the most effective method for calculating the differential ... Precise differential travel-time measurement is essential for earthquake relative locating.The waveform cross correlation(WCC)technique is widely regarded as the most effective method for calculating the differential travel-time of seismic phases.However,for earthquake pairs with large magnitude differences,substantial biases can arise due to disparities in the duration of the initial pulse,potentially leading to significant mislocations,particularly for mainshocks.To overcome this limitation,we propose to use the dynamic time warping(DTW)algorithm to optimize differential travel-time calculation.Using high-quality earthquake waveform data from the San Andreas Fault(2012−2019),we systematically compared the performance of DTW and WCC,respectively.Our results demonstrate that DTW substantially improves differential travel-time measurements,especially in cases involving large magnitude differences.In addition,we tested the robustness of DTW using noisy seismic data,demonstrating its superior resilience to noise. 展开更多
关键词 dynamic time warping waveform cross-correlation differential travel-time measurement magnitude difference
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Parametric Modeling of Glottal Flow in Form of Piecewise Differential Equations 认领 引用
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作者 MUSHTAQ Tahir MURTAZA Sadaf +2 位作者 SALEEM Muhammad FARHAD Khurram EJAZ Muhammad Faisal 《Journal of Shanghai Jiaotong university(Science)》 EI 2026年第4期1048-1056,I0021,共9页
For realistic speech generation,variation in glottal waveform models has long been proposed.Due to simplicity and efficiency,the parametric models of the glottal flow are very popular in the field of speech generation... For realistic speech generation,variation in glottal waveform models has long been proposed.Due to simplicity and efficiency,the parametric models of the glottal flow are very popular in the field of speech generation.The proposed work presents a new approach to modeling the glottal flow.The current model is comprised of two piecewise differential equations that generate a glottal pulse.The first and second differential equations generate the opening and closing phases of the vocal folds,respectively while the closed phase is taken as zero.There are four parameters involved in the proposed model to bring variation in the shape of the glottal pulse.The current model is very flexible in designing a glottal pulse and is comparable with the famous Liljencrants-Fant model,Rosenberg model,and KLGLOTT88 model.This comparison supports its successful implementation as a voice source in speech synthesis which also leads to the validity of our differential equation-based glottal model. 展开更多
关键词 glottal flow Liljencrants-Fant glottal model vocal folds parametric model differential form
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EXISTENCE AND STABILITY ANALYSIS OF EVOLUTIONARY DIFFERENTIAL HEMIVARIATIONAL INEQUALITIES IN BANACH SPACES 认领 引用
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作者 Wei LI Ke XU +1 位作者 Rong HU Zhiyang MA 《Acta Mathematica Scientia》 SCIE CSCD 2026年第2期549-567,共19页
this paper,we introduce and study a new class of evolutionary differential hemivariational inequalities in Banach spaces.Using a fixed-point theorem,we first establish the existence and uniqueness of mild solutions fo... this paper,we introduce and study a new class of evolutionary differential hemivariational inequalities in Banach spaces.Using a fixed-point theorem,we first establish the existence and uniqueness of mild solutions for the evolutionary differential hemivariational inequality.Building on this result,we then investigate the stability of the evolutionary differential hemivariational inequality problem under perturbations of the mappings,constraint set,and infinitesimal generator of the Co-semigroup etB. 展开更多
关键词 evolutionary differential hemivariational inequality mild solution stability Cosemigroup
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Element differential method for the multi-physics coupled contact analysis of high-temperature dynamic seal structure 认领 引用
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作者 Yong-Tong Zheng Wei-Long Fan +1 位作者 Xiao-Wei Gao Hua-Yu Liu 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第5期460-476,共17页
High-temperature dynamic seals are the structures used to seal movable clearances in high-temperature environments.The essential components of these seals are the fiber-braided seal strips.When it is working,the strip... High-temperature dynamic seals are the structures used to seal movable clearances in high-temperature environments.The essential components of these seals are the fiber-braided seal strips.When it is working,the strip is subjected to a transverse preload,decreasing its porosity and restricting gas flow to achieve sealing.To implement seal design,efficient numerical analysis is essential,which is supposed to involve the deformation,heat transfer,seepage,and the interactions among these physical processes.In this paper,a nonlinear thermal-mechanics-seepage coupled contact model is used to describe the seal strips with circular sections.An element differential scheme is proposed to solve the coupled governing equations,and an iterative procedure based on the element differential method(EDM)tracks the contact interfaces,which further determines the range of boundary conditions of other physical fields.The proposed method simplifies the computation by avoiding integral evaluations and reducing matrix density.Two examples are implemented to verify the correctness of the proposed scheme and to predict the variations in physical variables of the seal structures.Furthermore,a comparison between the EDM and finite element method results indicates that the EDM is more efficient because of fewer contact iterations and a sparser coefficient matrix. 展开更多
关键词 Element differential method High-temperature dynamic seals Multi-physics coupled analysis Strong-form scheme
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A Mix Location Privacy Preservation Method Based on Differential Privacy with Clustering 认领 引用
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作者 Fang Liu Xianghui Meng +1 位作者 Jiachen Li Sibo Guo 《Computers, Materials & Continua》 SCIE EI 2026年第2期632-652,共21页
With the popularization of smart devices,Location-Based Services(LBS)greatly facilitates users’life,but at the same time brings the risk of users’location privacy leakage.Existing location privacy protection methods... With the popularization of smart devices,Location-Based Services(LBS)greatly facilitates users’life,but at the same time brings the risk of users’location privacy leakage.Existing location privacy protection methods are deficient,failing to reasonably allocate the privacy budget for non-outlier location points and ignoring the critical location information that may be contained in the outlier points,leading to decreased data availability and privacy exposure problems.To address these problems,this paper proposes a Mix Location Privacy Preservation Method Based on Differential Privacy with Clustering(MLDP).The method first utilizes the DBSCAN clustering algorithm to classify location points into non-outliers and outliers.For non-outliers,the scoring function is designed by combining geographic information and semantic information,and the privacy budget is allocated according to the heat intensity of the hotspot area;for outliers,the scoring function is constructed to allocate the privacy budget based on their correlation with the hotspot area.By comprehensively considering the geographic information,semantic information,and correlation with hotspot areas of the location points,a reasonable privacy budget is assigned to each location point,andfinallynoise is added throughthe Laplacemechanismto realizeprivacyprotection.Experimental results on tworeal trajectory datasets,Geolife and T-Drive,show that the MLDP approach significantly improves data availability while effectively protecting location privacy.Compared with the comparison methods,the maximum available data ratio of MLDP is 1.Moreover,compared with the RandomNoise method,its execution time is 0.056–0.061 s longer,and the logRE is 0.12951–0.62194 lower;compared with KemeansDP,QTK-DP,DPK-F,IDP-SC,and DPK-Means-up methods,it saves 0.114–0.296 s in execution time,and the logRE is 0.01112–0.38283 lower. 展开更多
关键词 Location privacy protection DBSCAN clustering differential privacy hotspot area
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Real-time delayed interferometry for differential spectral phase characterization of soliton dynamics in a dual-comb fiber laser 认领 引用
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作者 YIFAN ZHANG XIN ZHAO ZHENG ZHENG 《Photonics Research》 SCIE EI CAS CSCD 2026年第6期2501-2506,共6页
Real-time,phase-resolved detection of pulse dynamics remains a challenge for understanding fast pulse interactions in ultrafast lasers.It is also of critical importance in developing high-performance lasers,such as du... Real-time,phase-resolved detection of pulse dynamics remains a challenge for understanding fast pulse interactions in ultrafast lasers.It is also of critical importance in developing high-performance lasers,such as dual-comb lasers where more complex pulse interactions could exist.Here,a real-time delayed interferometry technique is introduced to enable single-shot measurement of the differential spectral phase between consecutive pulses in a properly designed dual-comb fiber laser.It enables the quantification of the attosecond period jitter of the unperturbed pulses as well as the complete intensity-phase spectro-temporal dynamics of soliton collisions.Besides the wavelength shifts and the associated pulse period changes previously reported,spectral phase evolution and ultrafast pulse-collision induced timing transients unreported before are successfully captured.Numerical simulations further validate the differential spectral phase measurement results during the collision.This work provides further insight into the understanding of pulse interactions in dual-comb lasers and could facilitate the design of these lasers that could better mimic the ideal frequency combs for precision metrology. 展开更多
关键词 Pulse Interactions differential spectral phase Soliton Dynamics Dual comb Fiber Laser Phase resolved Detection understanding fast pulse interactions ultrafast lasersit Real time Delayed Interferometry
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FedGLP-ADP: Federated Learning with Gradient-Based Layer-Wise Personalization and Adaptive Differential Privacy 认领 引用
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作者 Di Xiao Wenting Jiang Min Li 《Computers, Materials & Continua》 SCIE EI 2026年第6期2514-2530,共17页
The rapid advancement of the Internet of Things(IoT)has transformed edge devices from simple data collectors into intelligent units capable of local processing and collaborative learning.However,the vast amounts of se... The rapid advancement of the Internet of Things(IoT)has transformed edge devices from simple data collectors into intelligent units capable of local processing and collaborative learning.However,the vast amounts of sensitive data generated by these devices face severe constraints from“data silos”and risks of privacy breaches.Federated learning(FL),as a distributed collaborative paradigm that avoids sharing raw data,holds great promise in the IoT domain.Nevertheless,it remains vulnerable to gradient leakage threats.While traditional differential privacy(DP)techniques mitigate privacy risks,they often come at the cost of significantly reduced model performance—a limitation particularly pronounced in resource-constrained IoT environments characterised by non-independent and identically distributed(non-IID)data distribution.To bridge the gap between privacy preservation and high performance on heterogeneous data,this paper proposes a novel personalized federated learning(PFL)method,FedGLP-ADP.This method leverages historical gradient information to provide a more detailed partitioning of parameters,aiming to prevent personalized knowledge from being affected by noise as much as possible,thereby reducing model degradation.Building on this,we propose an adaptive DP mechanism that optimizes both the clipping and noising steps to minimize the impact of noise on global knowledge.Experimental results show that FedGLP-ADP exhibits superior performance compared to other representative methods under different privacy levels and non-IID degrees. 展开更多
关键词 Personalized federated learning non-IID data differential privacy parameter decoupling
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Stochastic Differential Equation-Based Dynamic Imperfect Maintenance Strategy for Wind Turbine Systems 认领 引用
19
作者 Hongsheng Su Zhensheng Teng Zihan Zhou 《Energy Engineering》 EI 2026年第2期229-258,共30页
Addressing the limitations of inadequate stochastic disturbance characterization during wind turbine degradation processes that result in constrained modeling accuracy,replacement-based maintenance practices that devi... Addressing the limitations of inadequate stochastic disturbance characterization during wind turbine degradation processes that result in constrained modeling accuracy,replacement-based maintenance practices that deviate from actual operational conditions,and static maintenance strategies that fail to adapt to accelerated deterioration trends leading to suboptimal remaining useful life utilization,this study proposes a Time-Based Incomplete Maintenance(TBIM)strategy incorporating reliability constraints through stochastic differential equations(SDE).By quantifying stochastic interference via Brownian motion terms and characterizing nonlinear degradation features through state influence rate functions,a high-precision SDE degradation model is constructed,achieving 16%residual reduction compared to conventional ordinary differential equation(ODE)methods.The introduction of age reduction factors and failure rate growth factors establishes an incomplete maintenance mechanism that transcends traditional“as-good-as-new”assumptions,with the TBIM model demonstrating an additional 8.5%residual reduction relative to baseline SDE approaches.A dynamic maintenance interval optimization model driven by dual parameters—preventive maintenance threshold Rp and replacement threshold Rr—is designed to achieve synergistic optimization of equipment reliability and maintenance economics.Experimental validation demonstrates that the optimized TBIM extends equipment lifespan by 4.4%and reducesmaintenance costs by 4.16%at Rp=0.80,while achieving 17.2%lifespan enhancement and 14.6%cost reduction at Rp=0.90.This methodology provides a solution for wind turbine preventive maintenance that integrates condition sensitivity with strategic foresight. 展开更多
关键词 Stochastic differential equations(SDE) imperfect maintenance condition-based maintenance(CBM) time-based maintenance(TBM) reliability constraint wind turbine
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Structural Reliability Analysis Based on Differential Evolution Algorithm and Hypersphere Integration 认领 引用
20
作者 CHEN Zhenzhong HAN Zhuo +4 位作者 WANG Peiyu PAN Qianghua LI Xiaoke GAN Xuehui CHEN Ge 《Journal of Donghua University(English Edition)》 CAS 2026年第1期118-130,共13页
In reliability analyses,the absence of a priori information on the most probable point of failure(MPP)may result in overlooking critical points,thereby leading to biased assessment outcomes.Moreover,second-order relia... In reliability analyses,the absence of a priori information on the most probable point of failure(MPP)may result in overlooking critical points,thereby leading to biased assessment outcomes.Moreover,second-order reliability methods exhibit limited accuracy in highly nonlinear scenarios.To overcome these challenges,a novel reliability analysis strategy based on a multimodal differential evolution algorithm and a hypersphere integration method is proposed.Initially,the penalty function method is employed to reformulate the MPP search problem as a conditionally constrained optimization task.Subsequently,a differential evolution algorithm incorporating a population delineation strategy is utilized to identify all MPPs.Finally,a paraboloid equation is constructed based on the curvature of the limit-state function at the MPPs,and the failure probability of the structure is calculated by using the hypersphere integration method.The localization effectiveness of the MPPs is compared through multiple numerical cases and two engineering examples,with accuracy comparisons of failure probabilities against the first-order reliability method(FORM)and the secondorder reliability method(SORM).The results indicate that the method effectively identifies existing MPPs and achieves higher solution precision. 展开更多
关键词 reliability analysis design point positioning differential evolution algorithm hypersphere integration
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