Journal of Combinatorial Optimization最新文献

{"title":"On the enumeration of resolute majority rules","authors":"Josep Freixas, Dani Samaniego","doi":"10.1007/s10878-026-01412-9","DOIUrl":"https://doi.org/10.1007/s10878-026-01412-9","url":null,"abstract":"This paper considers resolute decision rules in which each voter may vote “yes\", “abstain\" or vote “no\", and the outcome is “yes\" or “no\". The model we consider is more general than that of simple games since the input admits abstention or indecision, but it is more specialized since it assumes the properties of monotonicity and anonymity. Many subclasses of these resolute decision rules have been studied in the literature from an axiomatic point of view. The purpose of this work is to enumerate these subclasses as a function of the number of voters.","PeriodicalId":50231,"journal":{"name":"Journal of Combinatorial Optimization","volume":"126 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147461815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Binary jumbled indexing: suffix tree histogram","authors":"Luís Cunha, Mário Medina","doi":"10.1007/s10878-026-01407-6","DOIUrl":"https://doi.org/10.1007/s10878-026-01407-6","url":null,"abstract":"Given a binary string <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$omega $$</jats:tex-math> <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mi>ω</mml:mi> </mml:math> </jats:alternatives> </jats:inline-formula> over the alphabet <jats:inline-formula> <jats:alternatives> <jats:tex-math>$${0, 1}$$</jats:tex-math> <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mo>{</mml:mo> <mml:mn>0</mml:mn> <mml:mo>,</mml:mo> <mml:mn>1</mml:mn> <mml:mo>}</mml:mo> </mml:mrow> </mml:math> </jats:alternatives> </jats:inline-formula> , a vector ( <jats:italic>a</jats:italic> , <jats:italic>b</jats:italic> ) is a Parikh vector if and only if a factor of <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$omega $$</jats:tex-math> <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mi>ω</mml:mi> </mml:math> </jats:alternatives> </jats:inline-formula> contains exactly <jats:italic>a</jats:italic> occurrences of 0 and <jats:italic>b</jats:italic> occurrences of 1. Answering whether a vector is a Parikh vector of <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$omega $$</jats:tex-math> <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mi>ω</mml:mi> </mml:math> </jats:alternatives> </jats:inline-formula> is known as the Binary Jumbled Indexing Problem ( <jats:sc>BJIP</jats:sc> ) or the Histogram Indexing Problem. Most solutions to this problem rely on an <jats:italic>O</jats:italic> ( <jats:italic>n</jats:italic> ) word-space index to answer queries in constant time, encoding the Parikh set of <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$omega $$</jats:tex-math> <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mi>ω</mml:mi> </mml:math> </jats:alternatives> </jats:inline-formula> , i.e., all its Parikh vectors. Cunha et al. ( <jats:italic>Combinatorial Pattern Matching</jats:italic> , 2017) introduced an algorithm ( <jats:italic>JBM2017</jats:italic> ), which computes the index table in <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$O(n+rho ^2)$$</jats:tex-math> <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mi>O</mml:mi> <mml:mo>(</mml:mo> <mml:mi>n</mml:mi> <mml:mo>+</mml:mo> <mml:msup> <mml:mi>ρ</mml:mi> <mml:mn>2</mml:mn> </mml:msup> <mml:mo>)</mml:mo> </mml:mrow> </mml:math> </jats:alternatives> </jats:inline-formula> time, where <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$rho $$</jats:tex-math> <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mi>ρ</mml:mi> </mml:math> </jats:alternatives> </jats:inline-formula> is the number of runs of identical digits in <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$omega $$</jats:tex-math> <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mi>ω</mml:mi> </mml:math> </jats:alternatives> </jats:inline-formula> , leading to <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$O(n^2)$$</jats:tex-math> <mml:math xmlns:mm","PeriodicalId":50231,"journal":{"name":"Journal of Combinatorial Optimization","volume":"130 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147462160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Online dispatching and routing for automated guided vehicles in pickup and delivery systems on loop-based graphs","authors":"Louis Stubbe, Jens Goemaere, Jan Goedgebeur","doi":"10.1007/s10878-026-01410-x","DOIUrl":"https://doi.org/10.1007/s10878-026-01410-x","url":null,"abstract":"","PeriodicalId":50231,"journal":{"name":"Journal of Combinatorial Optimization","volume":"3 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147373856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Maximum alternating clean balanced cycle decomposition and applications in rearrangement distance problems","authors":"Gabriel Siqueira, Klairton Lima Brito, Alexsandro Oliveira Alexandrino, Andre Rodrigues Oliveira, Ulisses Dias, Zanoni Dias","doi":"10.1007/s10878-026-01405-8","DOIUrl":"https://doi.org/10.1007/s10878-026-01405-8","url":null,"abstract":"In genome rearrangement, graph-based representations are widely used to analyze and solve rearrangement problems. In particular, when each gene occurs at most once, the breakpoint graph is a useful tool. A maximum cycle decomposition of this graph yields immediate lower bounds for several genome rearrangement distances. This paper introduces a generalization of the Maximum Alternating Cycle Decomposition problem ( <jats:sc>MAX-ACD</jats:sc> ), called the Maximum Alternating Clean Balanced Cycle Decomposition problem ( <jats:sc>MAX-ACBCD</jats:sc> ). The <jats:sc>MAX-ACD</jats:sc> problem is closely related to some rearrangement problems, where the orientation of the genes is unknown, and all genes are common to both genomes. The <jats:sc>MAX-ACBCD</jats:sc> problem has applications to related rearrangement problems, which allow genes present in only one of the genomes and consider both gene order and intergenic-region information. We present a constant-factor approximation and a heuristic for the <jats:sc>MAX-ACBCD</jats:sc> problem, and we performed tests with the heuristic applied to artificially generated genomes. Considering intergenic regions and a scenario where the orientation of the genes is known, we design an improved algorithm for the Sorting by Reversals and Intergenic Indels problem that guarantees an approximation factor of <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$frac{3}{2}$$</jats:tex-math> <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mfrac> <mml:mn>3</mml:mn> <mml:mn>2</mml:mn> </mml:mfrac> </mml:math> </jats:alternatives> </jats:inline-formula> . For the scenario where the orientation of the genes is unknown, and using the <jats:sc>MAX-ACBCD</jats:sc> problem, we develop approximation algorithms for the Sorting by Reversals, the Sorting by Reversals and Intergenic Indels, the Reversal, Transposition and Indel Distance, the Sorting by DCJ, and the Sorting by DCJ and Intergenic Indels problems with approximation factors of 2 <jats:italic>k</jats:italic> , <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$frac{3k}{2}$$</jats:tex-math> <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mfrac> <mml:mrow> <mml:mn>3</mml:mn> <mml:mi>k</mml:mi> </mml:mrow> <mml:mn>2</mml:mn> </mml:mfrac> </mml:math> </jats:alternatives> </jats:inline-formula> , 4 <jats:italic>k</jats:italic> , 2 <jats:italic>k</jats:italic> , and <jats:italic>k</jats:italic> , respectively, where <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$k=frac{31}{21}+epsilon $$</jats:tex-math> <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mi>k</mml:mi> <mml:mo>=</mml:mo> <mml:mfrac> <mml:mn>31</mml:mn> <mml:mn>21</mml:mn> </mml:mfrac> <mml:mo>+</mml:mo> <mml:mi>ϵ</mml:mi> </mml:mrow> </mml:math> </jats:alternatives> </jats:inline-formula> .","PeriodicalId":50231,"journal":{"name":"Journal of Combinatorial Optimization","volume":"30 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147373855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimal due date assignment in a single machine group technology scheduling environment with learning effect","authors":"Ying Chen, Yongxi Cheng, Jun Wu, Guiqing Zhang","doi":"10.1007/s10878-026-01397-5","DOIUrl":"https://doi.org/10.1007/s10878-026-01397-5","url":null,"abstract":"","PeriodicalId":50231,"journal":{"name":"Journal of Combinatorial Optimization","volume":"36 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147373857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The complexity of distance-r dominating set reconfiguration","authors":"Niranka Banerjee, Duc A. Hoang","doi":"10.1007/s10878-026-01406-7","DOIUrl":"https://doi.org/10.1007/s10878-026-01406-7","url":null,"abstract":"","PeriodicalId":50231,"journal":{"name":"Journal of Combinatorial Optimization","volume":"17 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147373858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Federated edge intelligence for secure and adaptive routing in IoT: a GRU–RL based framework","authors":"Wajih Abdallah","doi":"10.1007/s10878-026-01408-5","DOIUrl":"https://doi.org/10.1007/s10878-026-01408-5","url":null,"abstract":"","PeriodicalId":50231,"journal":{"name":"Journal of Combinatorial Optimization","volume":"241 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147373854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A multimodal meta-learning-augmented EmoTriSense for emotion recognition","authors":"V. Sowmya, A. Rajeswari","doi":"10.1007/s10878-026-01402-x","DOIUrl":"https://doi.org/10.1007/s10878-026-01402-x","url":null,"abstract":"","PeriodicalId":50231,"journal":{"name":"Journal of Combinatorial Optimization","volume":"12 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147373860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Competition between healthcare providers under subscription and fee-for-service: an equilibrium analysis of health information exchange system’s choice","authors":"Zhaofang Mao, Yuqiong Jiang, Yufeng Liao","doi":"10.1007/s10878-026-01413-8","DOIUrl":"https://doi.org/10.1007/s10878-026-01413-8","url":null,"abstract":"With the rapid advancement of health information technology and growing demand for efficient data sharing, Health Information Exchange (HIE) systems have gained increasing attention. However, research on HIE revenue schemes for asymmetric competitive healthcare providers (HPs) remains limited. This study develops a game-theoretic model to analyze the Health Information Exchange (HIE)’s optimal revenue-scheme selection under asymmetric competition between healthcare providers (HPs). Four combinations of subscription and fee-for-service (FFS) schemes are examined to derive equilibrium pricing, service quality, and welfare outcomes. To verify robustness, we conduct parameter sensitivity and Monte Carlo-based probabilistic analyses, showing that the welfare-optimal configuration (subscription for high-level HPs and FFS for low-level HPs) remains stable under the parameter uncertainty. Furthermore, the model is generalized to an N-HPs market, where the HIE’s revenue-scheme choice is formulated as a 0–1 combinatorial optimization problem. We prove a threshold structure and design a Sorting-and-Threshold Search Algorithm (STSA) that efficiently identifies stable welfare-maximizing assignments. Empirical case studies of U.S. HIEs validate the model and highlight adoption challenges and transitional incentives that promote sustainable implementation.","PeriodicalId":50231,"journal":{"name":"Journal of Combinatorial Optimization","volume":"32 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147507829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chaotic strategies-enhanced artificial electric field algorithm for combinatorial feature selection","authors":"Dikshit Chauhan, Deepika Khurana, Anupam Yadav","doi":"10.1007/s10878-026-01409-4","DOIUrl":"https://doi.org/10.1007/s10878-026-01409-4","url":null,"abstract":"Feature selection is a challenging combinatorial optimization problem that seeks to identify informative feature subsets from high-dimensional data while balancing classification accuracy and model interpretability. Traditional metaheuristic algorithms often experience premature convergence due to insufficient control over population diversity and exploration dynamics, especially in the case of high-dimensional combinatorial optimization problems. To overcome this limitation, this paper proposes a chaotic Artificial Electric Field Algorithm (cAEFA), in which chaotic strategies are systematically embedded into Coulomb’s constant, a core parameter governing agent interactions in AEFA. Unlike random perturbations, chaotic maps introduce deterministic yet ergodic dynamics that generate controlled diversity and enable adaptive regulation of exploration and exploitation across different search stages. Different chaotic strategies, which differ in their nonlinear behaviours and sensitivity to initial conditions, are used, which allows the algorithm to exhibit varied search trajectories and enhanced robustness. A normalization mechanism is further included to stabilize these chaotic influences to ensure smooth convergence. Extensive experimental results on forty-two benchmark problems from the IEEE CEC test suites and real-world feature selection problems demonstrate that cAEFA achieves superior solution quality, faster convergence, and improved generalization compared with state-of-the-art methods. These findings highlight the effectiveness of chaos-driven parameter modulation as a principled mechanism for enhancing metaheuristic search performance. The MATLAB code of cAEFA can be found at <ext-link ext-link-type=\"uri\" xlink:href=\"https://github.com/ChauhanDikshit\">https://github.com/ChauhanDikshit</ext-link>.","PeriodicalId":50231,"journal":{"name":"Journal of Combinatorial Optimization","volume":"90 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147507878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}