Complexity最新文献_第3页

Determinants of the Global FDI-Embodied Carbon Transfer Network: A Temporal ERGM Approach 全球fdi隐含碳转移网络的决定因素：一个时间ERGM方法

IF 1.6 4区工程技术

Complexity Pub Date : 2026-08-30 DOI: 10.1155/cplx/7359917

Peng Wang, Xueding Wang

{"title":"Determinants of the Global FDI-Embodied Carbon Transfer Network: A Temporal ERGM Approach","authors":"Peng Wang, Xueding Wang","doi":"10.1155/cplx/7359917","DOIUrl":"https://doi.org/10.1155/cplx/7359917","url":null,"abstract":"The study investigates the structural evolution and driving forces of the global foreign direct investment (FDI)–embodied carbon-transfer network from 2000 to 2019, utilizing a combination of social network analysis and econometric modeling. Leveraging the OECD Analytical Activities of Multinational Enterprises (AMNE) database and carbon-emission data, the research constructs a network of carbon flows embedded in FDI, identifying key transmission hubs and trends over 2 decades. The findings indicate that the network remained structured around a small number of major source economies, with the China aggregate surpassing the United States as the largest source of FDI-embodied carbon outflows by 2019. The study combines motif analysis with a temporal exponential random graph model (TERGM) to assess the determinants of network evolution. Compared with static ERGM or QAP regression, the TERGM evaluates the endogenous network structure, nodal attributes, dyadic covariates, and temporal change across a sequence of annual networks within a common framework. The results show that regional trade agreements are positively associated with tie formation across subperiods, while a formal interaction test indicates a stronger post-2009 association for international investment agreements. The normalized motif profiles also reveal the relative prominence of a recurring “carbon-transfer club” configuration, in which regional integration intensifies carbon-transfer ties among groups of economies. These findings extend aggregate and bilateral FDI-carbon accounting by identifying temporal and structural interdependence in global investment–related carbon transfers and underscore the need for policies that address the environmental implications of FDI while promoting sustainable economic integration.","PeriodicalId":50653,"journal":{"name":"Complexity","volume":"2026 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/cplx/7359917","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148943629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonlinear Within-Host Modeling of HBV Infection Reveals Immune-Dependent Clearance and Persistence Pathways 乙型肝炎病毒感染的非线性宿主模型揭示了免疫依赖性清除和持久性途径

IF 1.6 4区工程技术

Complexity Pub Date : 2026-08-27 DOI: 10.1155/cplx/6950399

Malik Muhammad Ibrahim, Jihwan Ha, Muhammad Umair Ali, Yong Dam Jeong, Lijiao Jia, Kwang Su Kim

{"title":"Nonlinear Within-Host Modeling of HBV Infection Reveals Immune-Dependent Clearance and Persistence Pathways","authors":"Malik Muhammad Ibrahim, Jihwan Ha, Muhammad Umair Ali, Yong Dam Jeong, Lijiao Jia, Kwang Su Kim","doi":"10.1155/cplx/6950399","DOIUrl":"https://doi.org/10.1155/cplx/6950399","url":null,"abstract":"We present a comprehensive within-host mathematical model to quantify long-term hepatitis B virus (HBV) dynamics under pharmacological immune suppression and subsequent immune recovery. The model integrates nonlinear intracellular cccDNA production, ALT release, and both cytolytic and noncytolytic CD8+ T-cell responses within an eight-dimensional ODE framework. Using longitudinal HBV DNA, HBsAg, ALT, cccDNA, and CD8+ T-cell activation data from immunosuppressed rhesus macaques, parameters were estimated via the SAEM algorithm, yielding simulations that accurately reproduced prolonged viremia and cccDNA accumulation during immune suppression, followed by rapid viral decline after drug withdrawal. Long-term simulations revealed two distinct dynamical outcomes, viral clearance or persistent infection, emerging from variations in immune activation and killing efficacy. These results demonstrate how nonlinear intracellular regulation and immune-driven feedback collectively determine infection fate and establish a modeling framework applicable to broader classes of host–virus systems involving immune suppression and recovery.","PeriodicalId":50653,"journal":{"name":"Complexity","volume":"2026 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/cplx/6950399","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148849197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Economic Complexity, Green Innovation, and Environmental Performance: Evidence on Heterogeneity and Structural Relationships in G20 Economies 经济复杂性、绿色创新与环境绩效：G20经济体异质性和结构关系的证据

IF 1.6 4区工程技术

Complexity Pub Date : 2026-08-25 DOI: 10.1155/cplx/5165968

Jiahang Zhang, Yu Zhang, Muhammad Nouman Shafiq, Muhammad Saeed, Seemab Gillani

{"title":"Economic Complexity, Green Innovation, and Environmental Performance: Evidence on Heterogeneity and Structural Relationships in G20 Economies","authors":"Jiahang Zhang, Yu Zhang, Muhammad Nouman Shafiq, Muhammad Saeed, Seemab Gillani","doi":"10.1155/cplx/5165968","DOIUrl":"https://doi.org/10.1155/cplx/5165968","url":null,"abstract":"Environmental sustainability remains a key policy and governance challenge for G20 economies, which contribute significantly to global production, energy consumption, and environmental pressures. This study examines how structural economic transformation, green technological innovation, energy use, and urbanization influence environmental performance across G20 countries over the period 2000–2024. Environmental performance is measured using the environmental performance index (EPI). To address cross-sectional dependence, slope heterogeneity, and mixed integration orders, the analysis employs advanced panel estimators, including CS-ARDL, augmented mean group (AMG), and common correlated effects mean group (CCEMG). The results indicate that economic complexity and green technology innovation significantly improve environmental performance, highlighting the importance of diversified production structures and innovation-oriented policies. Renewable energy consumption consistently enhances environmental outcomes, underscoring the role of clean energy policies in sustainability governance. In contrast, economic growth exerts a negative long-run effect, confirming the persistence of growth–environment trade-offs in the absence of effective regulation. Political stability shows a modest but positive impact, suggesting that stable governance environments support the implementation and continuity of environmental policies, though stability alone is insufficient without targeted interventions. Urbanization produces mixed effects, reflecting differences in urban planning capacity and policy coordination across countries. Overall, the findings emphasize the need for integrated governance strategies that combine political stability, green innovation, renewable energy expansion, and sustainable urban development to improve environmental performance in G20 economies.","PeriodicalId":50653,"journal":{"name":"Complexity","volume":"2026 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/cplx/5165968","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148848894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the Locally Compact Hausdorff Property in the Analytical Solutions and Stability Analysis of the Caputo Fractional Belousov–Zhabotinsky System Caputo分数阶Belousov-Zhabotinsky系统解析解的局部紧Hausdorff性质及稳定性分析

IF 1.6 4区工程技术

Complexity Pub Date : 2026-08-24 DOI: 10.1155/cplx/7917920

Faten H. Damag, Mohammad Alshammari, Amin Saif, Yusuf Zeren, Mohammed S. Alsharafi

{"title":"On the Locally Compact Hausdorff Property in the Analytical Solutions and Stability Analysis of the Caputo Fractional Belousov–Zhabotinsky System","authors":"Faten H. Damag, Mohammad Alshammari, Amin Saif, Yusuf Zeren, Mohammed S. Alsharafi","doi":"10.1155/cplx/7917920","DOIUrl":"https://doi.org/10.1155/cplx/7917920","url":null,"abstract":"The fractional Belousov–Zhabotinsky system (BZS) is an important reaction–diffusion model used to describe oscillatory chemical reactions, pattern formation, and memory-dependent dynamical processes arising in chemistry and related applied sciences. The main objective of this study is to investigate the analytical properties of the fractional BZS and to construct accurate approximate solutions for the corresponding nonlinear system. To achieve this goal, the locally compact Hausdorff property together with the compact-open topology is employed to establish the existence and uniqueness of solutions within an appropriate Banach space framework. In addition, the Hyers–Ulam stability of the proposed fractional model is analyzed, demonstrating the robustness of the obtained solutions under small perturbations of the initial data. Furthermore, a hybrid analytical technique combining the double Laplace transform and the Adomian decomposition method, called the double Laplace Adomian decomposition method (DLADM), is developed to derive approximate analytical solutions. The obtained results show that the proposed approach produces rapidly convergent solution series and yields excellent agreement with the corresponding exact solutions. The theoretical findings confirm the well-posedness and stability of the fractional BZS, while the numerical results demonstrate the effectiveness and accuracy of the DLADM in handling the nonlinear fractional model. The proposed framework may be useful for the analysis of nonlinear fractional reaction–diffusion systems arising in chemical kinetics, biological processes, and other applied mathematical models.","PeriodicalId":50653,"journal":{"name":"Complexity","volume":"2026 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/cplx/7917920","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148848805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cost-Aware Multiwindow Ensemble Decision Support for Nonstationary Foreign Exchange Markets 非平稳外汇市场的成本感知多窗口集成决策支持

IF 1.6 4区工程技术

Complexity Pub Date : 2026-08-24 DOI: 10.1155/cplx/1155228

Dmitry Grigoriev, Alexander Musaev, Anastasia Grigorieva

{"title":"Cost-Aware Multiwindow Ensemble Decision Support for Nonstationary Foreign Exchange Markets","authors":"Dmitry Grigoriev, Alexander Musaev, Anastasia Grigorieva","doi":"10.1155/cplx/1155228","DOIUrl":"https://doi.org/10.1155/cplx/1155228","url":null,"abstract":"Financial markets are strongly nonstationary, making short-horizon foreign exchange decision support sensitive to estimation windows, feature design, and transaction costs. This paper proposes a transparent multiwindow ensemble framework in which interpretable multiregression experts use rolling-statistic features computed over different lookback windows. Time-scale diversity is combined with a supervisory layer that converts recent cost-aware utility scores into expert weights and selects execution thresholds on a meta window. The utility criterion is based on net pips after transaction costs and includes penalties for drawdown and turnover, while the execution rule incorporates volatility gating and minimum holding constraints. The framework is evaluated on synchronized one-minute quotes for 16 major currency pairs using a nonoverlapping walk-forward protocol. The benchmark set includes lag-based machine-learning models, LSTM, Transformer, Echo State Network, Bayesian model averaging, dynamic model averaging, stacking, and alternative multiexpert aggregation rules. In the main fixed-horizon experiment with τ = 15 minutes, the proposed utility-weighted ensemble achieves the highest mean Sharpe ratio of 1.085 and a mean net profit of 312.3 pips. The results support utility-calibrated time-scale diversification as an auditable approach to FX decision support under nonstationarity.","PeriodicalId":50653,"journal":{"name":"Complexity","volume":"2026 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/cplx/1155228","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148848807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Some New Investigations on the Dynamic Biocompetitive Ecological Model (DBEM): A Nonautonomous Framework for Planetary Overshoot 动态生物竞争生态模型（DBEM）的一些新研究：行星超调的非自治框架

IF 1.6 4区工程技术

Complexity Pub Date : 2026-08-24 DOI: 10.1155/cplx/4438720

Rishav Jha, Aashiq Mahato, Suresh Kumar Sahani, Kameshwar Sahani, Binod Kumar Sah, K. Sathishkumar

{"title":"Some New Investigations on the Dynamic Biocompetitive Ecological Model (DBEM): A Nonautonomous Framework for Planetary Overshoot","authors":"Rishav Jha, Aashiq Mahato, Suresh Kumar Sahani, Kameshwar Sahani, Binod Kumar Sah, K. Sathishkumar","doi":"10.1155/cplx/4438720","DOIUrl":"https://doi.org/10.1155/cplx/4438720","url":null,"abstract":"Seven of nine planetary boundaries have been transgressed and anthropogenic mass now exceeds all living biomass, yet existing collapse models assume ecological regeneration—contradicting tipping-point evidence—while integrated assessment models rely on smooth damage functions that preclude irreversibility. We introduce the dynamic biocompetitive ecological model (DBEM), a three-variable nonautonomous dynamical system coupling human population, technosphere mass, and a novel quantity—effective structural capacity—that represents the fraction of Earth’s life-support systems still functional. The DBEM’s central innovation is irreversible capacity decay: Once structural capacity is lost through technosphere metabolism, it does not regenerate. Calibrated to published 2025 data and recast in a nondimensional form, the model yields a single overshoot ratio of 1.23, confirming that the technosphere exceeds sustainably supported capacity by 23 percent. Two collapse thresholds emerge with fundamentally different time scales: an overshoot threshold, already crossed, that drives accelerating biosphere degradation, and a reproductive failure threshold, orders of magnitude more distant, that would constrain human population directly. Between them lies an intermediate regime—absent from all existing collapse and integrated assessment models—in which structural capacity is eroding but population dynamics remain unconstrained. This regime constitutes a policy-relevant window whose duration depends on the rate of capacity degradation and whose stabilization requires simultaneously reducing the material scale of the technosphere and arresting further biosphere erosion.","PeriodicalId":50653,"journal":{"name":"Complexity","volume":"2026 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/cplx/4438720","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148848806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Evolutionary Game-Theoretic Approach to Assessing Single-Season Vaccination Strategies in a Two-Strain Epidemic Model 基于进化博弈论的两株流行病模型单季疫苗接种策略评估方法

IF 1.6 4区工程技术

Complexity Pub Date : 2026-08-20 DOI: 10.1155/cplx/5051384

Md. Jaman Mia, K. M. Ariful Kabir

{"title":"An Evolutionary Game-Theoretic Approach to Assessing Single-Season Vaccination Strategies in a Two-Strain Epidemic Model","authors":"Md. Jaman Mia, K. M. Ariful Kabir","doi":"10.1155/cplx/5051384","DOIUrl":"https://doi.org/10.1155/cplx/5051384","url":null,"abstract":"This study investigates the impact of single-dose vaccination strategies on the transmission dynamics of double-strain infectious diseases within a single epidemic season, in which the original and mutant strains cocirculate in a population. To capture the interaction between epidemiological processes and adaptive human behavior, we develop a coupled evolutionary–epidemiological framework in which vaccination uptake evolves dynamically according to replicator dynamics driven by state-dependent payoffs. The model incorporates key factors, including vaccination costs, vaccine efficacy, infection risk, and policy-driven incentives, enabling individuals to update their decisions in response to real-time epidemic conditions continuously. A mathematical analysis yields explicit expressions for the basic reproduction numbers of both strains and establishes conditions for their coexistence. The results show that vaccine efficacy, particularly against mutant strains, plays a critical role in suppressing infection peaks and preventing strain dominance. Furthermore, reduced vaccination costs and increased public awareness significantly enhance vaccination uptake, thereby lowering overall disease burden. Numerical simulations confirm that high vaccine effectiveness, combined with affordable costs and targeted awareness campaigns, substantially reduces outbreak risks, whereas behavioral hesitancy can sustain transmission through insufficient vaccination coverage. Sensitivity analysis further identifies transmission rates, recovery rates, and vaccination-related parameters as key determinants of epidemic outcomes. Overall, these findings highlight the importance of integrating behavioral responses into epidemic models and provide insights for designing adaptive and cost-effective vaccination strategies in the presence of competing pathogen strains.","PeriodicalId":50653,"journal":{"name":"Complexity","volume":"2026 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/cplx/5051384","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic Cognitive Resource Allocation in Platform-Based Manufacturing Companies Innovation Ecosystems: Game-Theoretic Modeling of Governance Tradeoffs 基于平台的制造企业创新生态系统中的动态认知资源配置：治理权衡的博弈论模型

IF 1.6 4区工程技术

Complexity Pub Date : 2026-08-17 DOI: 10.1155/cplx/6823250

Yongquan Guo, Mengyao Zhang, Deyu He

{"title":"Dynamic Cognitive Resource Allocation in Platform-Based Manufacturing Companies Innovation Ecosystems: Game-Theoretic Modeling of Governance Tradeoffs","authors":"Yongquan Guo, Mengyao Zhang, Deyu He","doi":"10.1155/cplx/6823250","DOIUrl":"https://doi.org/10.1155/cplx/6823250","url":null,"abstract":"Addressing the conflict between “centralized control and decentralized coordination” in the allocation of cognitive resources within the innovation ecosystem of platform-based manufacturing enterprises, as well as the governance dilemma of balancing short-term efficiency with long-term innovation, this paper constructs a multiagent interaction model encompassing internal “leadership–team–employees” and external “government–platform–partner enterprises–consumers.” Through MATLAB numerical simulations, the paper compares resource allocation efficiency under centralized and decentralized decision-making and reveals the characteristics of a double-threshold bifurcation and the optimal governance range. The results indicate that (1) excessive internal centralization inhibits innovation vitality, whilst decentralized decision-making, although enhancing innovation output, tends to lead to increased coordination costs; (2) external centralized governance is more conducive to the integration of cognitive resources, whereas the decentralized model suffers from significant fragmentation; and (3) the system exhibits an internal bifurcation threshold <math></math> = −0.403 and an external bifurcation threshold <math></math> = −0.374, which together form a three-segment bifurcation structure; (4) the optimal governance model is “internal decentralization + external centralization,” which simultaneously maximizes both grassroots innovation dynamism and external integration efficiency. This paper expands the application boundaries of distributed cognition and differential games in platform governance, providing a theoretical basis and quantitative decision-making tools for platform-based manufacturing enterprises to dynamically optimize the allocation of cognitive resources, and for governments to refine innovation incentive policies.","PeriodicalId":50653,"journal":{"name":"Complexity","volume":"2026 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/cplx/6823250","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Qualitative Analysis of a Leslie–Gower Discrete Prey–Predator System With Allee Effect Under Deterministic and Stochastic Environment 确定性和随机环境下具有缝隙效应的Leslie-Gower离散捕食-捕食系统的定性分析

IF 1.6 4区工程技术

Complexity Pub Date : 2026-08-17 DOI: 10.1155/cplx/1425900

Md. Mutakabbir Khan, Md. Jasim Uddin, Abdul Qadeer Khan

{"title":"Qualitative Analysis of a Leslie–Gower Discrete Prey–Predator System With Allee Effect Under Deterministic and Stochastic Environment","authors":"Md. Mutakabbir Khan, Md. Jasim Uddin, Abdul Qadeer Khan","doi":"10.1155/cplx/1425900","DOIUrl":"https://doi.org/10.1155/cplx/1425900","url":null,"abstract":"This work examines a two-dimensional discrete Leslie-type predator–prey system in which the prey dynamics are subject to the Allee effect. The primary objective is to determine equilibrium states and examine bifurcation phenomena in the neighborhood of the positive fixed point, highlighting their ecological significance. The analysis of the interior equilibrium confirms that the model undergoes several essential dynamical changes, including one-parameter bifurcations together with period-doubling and Neimark–Sacker bifurcation mechanisms. To clarify the structure of these transitions, the associated nondegeneracy requirements are established and the critical normal form coefficients are explicitly evaluated. The chaotic responses and bifurcation-generated oscillations are subsequently suppressed through the combined use of state–feedback control and the Ott–Grebogi–Yorke (OGY) strategy. Biologically, the results emphasize the central role of the Allee effect in regulating predator–prey behavior. More precisely, a moderate Allee influence tends to stabilize the interacting populations, promote their coexistence, and strengthen the long-term viability of the ecosystem. Moreover, the bifurcation properties of the discrete predator–prey system are also explored in a coupled network framework. The numerical results show that when the coupling intensity surpasses a critical threshold, the network dynamics become chaotic and display intricate, irregular oscillatory patterns. In addition, stochastic simulations based on the Euler–Maruyama scheme were performed to examine system behavior under environmental variability, allowing the model to reflect diverse ecological conditions.","PeriodicalId":50653,"journal":{"name":"Complexity","volume":"2026 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/cplx/1425900","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recursive Feature Elimination With Cross-Validation for Experimental Surface Electromyography Signal Decoding 基于交叉验证的递归特征消除实验表面肌电信号解码

IF 1.6 4区工程技术

Complexity Pub Date : 2026-08-17 DOI: 10.1155/cplx/9903772

Muhammad Faisal, Ikramullah Khosa, Asim Waris, Khalid A. Ansari, Mar’e Mohammad Ahmad Alzghoul, Ahmed Merghani, Falah Alanazi, Syed Omer Gilani

{"title":"Recursive Feature Elimination With Cross-Validation for Experimental Surface Electromyography Signal Decoding","authors":"Muhammad Faisal, Ikramullah Khosa, Asim Waris, Khalid A. Ansari, Mar’e Mohammad Ahmad Alzghoul, Ahmed Merghani, Falah Alanazi, Syed Omer Gilani","doi":"10.1155/cplx/9903772","DOIUrl":"https://doi.org/10.1155/cplx/9903772","url":null,"abstract":"Surface electromyography (sEMG) plays a crucial role in decoding neuromuscular activity, with applications in prosthetic control and human–computer interaction. While extensive research has focused on hand gesture classification, discriminating identical hand movements performed at varying wrist angles remains underexplored. This study evaluates five feature reduction techniques, namely, principal component analysis (PCA), linear discriminant analysis (LDA), chi-square test, mutual information (MI), and recursive feature elimination with cross-validation (RFECV) for classifying five wrist-based hand movements. Two independent sEMG datasets were analyzed. Experimentally collected Dataset 1 comprised 17 subjects performing 5 repetitions of hand movements at wrist angles (+45°, +90°, 0°, −45°, and −90°) using the Delsys Trigno electromyography system. Dataset 2 (Ninapro DB1, Exercise B, Movements 13–17) comprised 27 subjects performing 10 repetitions of 5 distinct wrist and hand movements. Gradient boosting, LightGBM, random forest, SVM-RBF, and a 1D-CNN classifier were evaluated under different validation strategies, including subject-wise hold-out, subject-wise cross-validation, and movement-level cross-validation. RFECV consistently delivered strong performance across both datasets. Mean accuracies ranged from 77.73% under movement-level cross-validation to 90.11% under subject-wise hold-out, with best subject-wise accuracies reaching 95.38% on Dataset 1 and 96.35% on Dataset 2. In contrast, the 1D-CNN on raw EMG windows yielded only 36.64% mean accuracy, confirming the importance of feature engineering. These findings demonstrate that RFECV is a reliable and generalizable feature selection technique for sEMG-based movement classification, particularly for challenging tasks involving angular variations of identical hand movements.","PeriodicalId":50653,"journal":{"name":"Complexity","volume":"2026 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/cplx/9903772","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0