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Multilayer Information Spillover Networks: Application to Stocks Cross-listed in Mainland China and Hong Kong 多层信息溢出网络：在内地与香港交叉上市公司中的应用
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-07-29 DOI: 10.1016/j.ifacol.2025.07.069
Hongyu Liu , Hao Xia
{"title":"Multilayer Information Spillover Networks: Application to Stocks Cross-listed in Mainland China and Hong Kong","authors":"Hongyu Liu ,&nbsp;Hao Xia","doi":"10.1016/j.ifacol.2025.07.069","DOIUrl":"10.1016/j.ifacol.2025.07.069","url":null,"abstract":"<div><div>This study constructs a multilayer network framework that captures both within and across market interactions, to measure the volatility spillovers among stocks listed across both Hong Kong and Mainland Chinese exchanges. We find that: (i) From a system-level perspective, the volatility network’s total connectedness reacts notably to major events, while the leader for cross-market spillovers is not constant but shifts with time. (ii) From an individual-level perspective, cross-listed stock pairs display varying spillover influence across and within markets; however, the bidirectional spillovers between them are generally symmetric and tend to be strengthened by the introduction of inter-market connectivity policies. This research offers an innovative approach for a deeper understanding of the connectedness characteristics of cross-listed stocks and for optimizing risk management decisions.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 4","pages":"Pages 205-209"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Distributed Constraint-Coupled Optimization: Harnessing ADMM-consensus for robustness 分布式约束耦合优化：利用admm一致性实现鲁棒性
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-07-29 DOI: 10.1016/j.ifacol.2025.07.067
A. Mohamed Messilem , Guido Carnevale , Ruggero Carli
{"title":"Distributed Constraint-Coupled Optimization: Harnessing ADMM-consensus for robustness","authors":"A. Mohamed Messilem ,&nbsp;Guido Carnevale ,&nbsp;Ruggero Carli","doi":"10.1016/j.ifacol.2025.07.067","DOIUrl":"10.1016/j.ifacol.2025.07.067","url":null,"abstract":"<div><div>In this paper, we consider a network of agents that jointly aim to minimize the sum of local functions subject to coupling constraints involving all local variables. To solve this problem, we propose a novel solution based on a primal-dual architecture. The algorithm is derived starting from an alternative definition of the Lagrangian function, and its convergence to the optimal solution is proved using recent advanced results in the theory of timescale separation in nonlinear systems. The rate of convergence is shown to be linear under standard assumptions on the local cost functions. Interestingly, the algorithm is amenable to a direct implementation to deal with asynchronous communication scenarios that may be corrupted by other non-idealities such as packet loss. We numerically test the validity of our approach on a real-world application related to the provision of ancillary services in three-phase low-voltage microgrids.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 4","pages":"Pages 193-198"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the rate of convergence of distributed relaxed-ADMM algorithms in distributed optimization 分布式松弛admm算法在分布式优化中的收敛速度
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-07-29 DOI: 10.1016/j.ifacol.2025.07.066
Leonardo Armijos-Bacuilima , A. Mohamed Messilem , Luca Schenato , Ruggero Carli
{"title":"On the rate of convergence of distributed relaxed-ADMM algorithms in distributed optimization","authors":"Leonardo Armijos-Bacuilima ,&nbsp;A. Mohamed Messilem ,&nbsp;Luca Schenato ,&nbsp;Ruggero Carli","doi":"10.1016/j.ifacol.2025.07.066","DOIUrl":"10.1016/j.ifacol.2025.07.066","url":null,"abstract":"<div><div>In this paper, we present a preliminary analysis of the convergence rate of the relaxed ADMM-based algorithm recently introduced in the literature for distributed optimization problems. It is well known that the relaxed ADMM is a more general algorithm than the classical ADMM. Indeed, while the performance of the latter typically depends on one parameter, say <em>p,</em> the performance of the former depends on two parameters, say <em>p</em> and a, and the relaxed ADMM reduces to the classical ADMM when <em>α =</em> 1/2. Interestingly, from a computational point of view, the presence of the additional parameter <em>a</em> does not significantly complicate the updating steps of the algorithm. Nevertheless, the relaxed ADMM is much less considered in distributed optimization problems than the classical ADMM. In this paper, we show that by restricting to quadratic functions with the same convexity and to communication graphs that are regular connected graphs, it is possible to analytically compute the eigenvalues of the matrix that governs the dynamics of the algorithm based on the relaxed ADMM. Based on these eigenvalues, it is possible to design an efficient numerical procedure to evaluate the rate of convergence and to optimise it with respect to both <em>α</em> and <em>p.</em> Our results show that, by properly tuning the <em>a</em> parameter, the relaxed ADMM can can achieve superior convergence rates compared to its classical ADMM counterpart; in particular, for the family of graphs we considered, the optimal <em>a</em> typically tends to 1 as the number of agents increases. The analysis we present is preliminary, but suggests that the use of the relaxed ADMM can significantly improve the performance of the classical ADMM when applied to distributed optimization problems, at the price of a slight increase in computational complexity.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 4","pages":"Pages 187-192"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
From Dissensus to Consensus: Bias-Controlled Transition in Nonlinear Opinion Dynamics⁎ 从异议到共识：非线性意见动力学中的偏见控制转变
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-07-29 DOI: 10.1016/j.ifacol.2025.07.059
Rajul Kumar, Ningshi Yao
{"title":"From Dissensus to Consensus: Bias-Controlled Transition in Nonlinear Opinion Dynamics⁎","authors":"Rajul Kumar,&nbsp;Ningshi Yao","doi":"10.1016/j.ifacol.2025.07.059","DOIUrl":"10.1016/j.ifacol.2025.07.059","url":null,"abstract":"<div><div>We propose a novel bias-based consensus framework for nonlinear opinion dynamics. Due to the observable and malleable nature of bias in human-robot interactions, we utilize it as a control parameter to achieve consensus. First, we analyze the Lyapunov–Schmidt reduced system near equilibrium under small bias assumptions. Through constrained cusp bifurcation, we show that increasing individual biases beyond identified thresholds—and relative biases beyond saddle-node limit points ensures consensus with a unique stable equilibrium. For large biases, we conduct a global phase-plane analysis. By establishing strong monotonicity and applying the Poincaré–Bendixson theorem, we eliminate the possibility of limit cycles and guarantee consensus with a unique stable attractor as equilibrium. Finally, along with numerical simulations for the two-agent, two-option case, we show that the proposed bias control approach extends seamlessly to decentralized multi-agent opinion consensus.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 4","pages":"Pages 145-150"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Trade-off in Quantization Between Data-driven Design and Control Inputs⁎ 数据驱动设计和控制输入之间的量化权衡
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-07-29 DOI: 10.1016/j.ifacol.2025.07.052
Iori Takaki , Ahmet Cetinkaya , Hideaki Ishii
{"title":"Trade-off in Quantization Between Data-driven Design and Control Inputs⁎","authors":"Iori Takaki ,&nbsp;Ahmet Cetinkaya ,&nbsp;Hideaki Ishii","doi":"10.1016/j.ifacol.2025.07.052","DOIUrl":"10.1016/j.ifacol.2025.07.052","url":null,"abstract":"<div><div>In this paper, we consider a remote control problem based on data-driven control with an emphasis on communication constraints. Specifically, we propose a direct data-driven stabilization method with quantization in input and state data for unknown discrete-time linear systems. Moreover, the controller is designed taking account of the effects of quantization in the feedback data. Logarithmic type quantization is employed, and we show the inherent trade-off in the quantization coarseness for data-driven design and feedback control. We illustrate the effectiveness of the method through numerical simulations.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 4","pages":"Pages 103-108"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Distributed Parameter Estimation with Adversaries via Multi-Hop Relays⁎ 基于多跳中继的对手分布式参数估计
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-07-29 DOI: 10.1016/j.ifacol.2025.07.054
Liwei Yuan , Hideaki Ishii
{"title":"Distributed Parameter Estimation with Adversaries via Multi-Hop Relays⁎","authors":"Liwei Yuan ,&nbsp;Hideaki Ishii","doi":"10.1016/j.ifacol.2025.07.054","DOIUrl":"10.1016/j.ifacol.2025.07.054","url":null,"abstract":"<div><div>We study resilient distributed parameter estimation in multi-agent systems where some agents may malfunction. The objective is for each nonfaulty agent to locally estimate its parameter while it may interact with adversaries. To this end, we develop an algorithm using multi-hop relaying to achieve the goal in multi-agent networks with directed topologies. With multi-hop relays, agents can access more information of remote agents even though they communicate with only direct neighbors. We characterize a necessary and sufficient graph condition for our algorithm to succeed, which is denoted by the notion of robust following graphs. We prove that our condition with multi-hop relays is more relaxed than the one with one-hop case, and hence, our approach can tolerate more adversaries in the same network when multi-hop relays are applied. Lastly, numerical examples verify the efficacy of our algorithm.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 4","pages":"Pages 115-120"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Neural Network-based Stability Guarantee for Dissensus Opinion Behaviors on the Sphere⁎ 基于神经网络的球面上意见分歧行为稳定性保证[j]
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-07-29 DOI: 10.1016/j.ifacol.2025.07.044
Junkai Wang , Ziqiao Zhang , Fumin Zhang
{"title":"Neural Network-based Stability Guarantee for Dissensus Opinion Behaviors on the Sphere⁎","authors":"Junkai Wang ,&nbsp;Ziqiao Zhang ,&nbsp;Fumin Zhang","doi":"10.1016/j.ifacol.2025.07.044","DOIUrl":"10.1016/j.ifacol.2025.07.044","url":null,"abstract":"<div><div>In this paper, we develop a neural network-based method to study opinion behaviors under a covariance-based dissensus algorithm. Driven by this dissensus algorithm, the opinions are updated based on relative interactions and gradually converge to dissensus on the sphere. This proposed neural network-based method samples data and trains a neural network to ensure the Lyapunov conditions, which significantly simplifies the Lyapunov function design for stability analysis. The regions of attraction for different dissensus equilibria can also be estimated under opinion dynamics on a unit sphere by training a neural network to approximate the solution of Zubov’s equation. Simulations demonstrate the performance of the proposed method.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 4","pages":"Pages 55-60"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Lazy Student’s Dream: ChatGPT Passing an Engineering Course on Its Own 懒惰学生的梦想：ChatGPT自己通过工程课程
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-09-04 DOI: 10.1016/j.ifacol.2025.08.049
Gokul Puthumanaillam, Timothy Bretl, Melkior Ornik
{"title":"The Lazy Student’s Dream: ChatGPT Passing an Engineering Course on Its Own","authors":"Gokul Puthumanaillam,&nbsp;Timothy Bretl,&nbsp;Melkior Ornik","doi":"10.1016/j.ifacol.2025.08.049","DOIUrl":"10.1016/j.ifacol.2025.08.049","url":null,"abstract":"<div><div>This paper presents a comprehensive investigation into the capability of Large Language Models (LLMs) to successfully complete a semester-long undergraduate control systems course. Through evaluation of 115 course deliverables, we assess LLM performance using ChatGPT under a “minimal effort” protocol that simulates realistic student usage patterns. The investigation employs a rigorous testing methodology across multiple assessment formats, from auto-graded multiple choice questions to complex Python programming tasks and long-form analytical writing. Our analysis provides quantitative insights into AI’s strengths and limitations in handling mathematical formulations, coding challenges, and theoretical concepts in control systems engineering. The LLM achieved a B-grade performance (82.24%), approaching but not exceeding the class average (84.99%), with strongest results in structured assignments and greatest limitations in open-ended projects. The findings inform discussions about course design adaptation in response to AI advancement, moving beyond simple prohibition towards thoughtful integration of these tools in engineering education. Additional materials including syllabus, examination papers, design projects, and example responses can be found at the project website: <span><span>https://gradegpt.github.io</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 7","pages":"Pages 213-218"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interdisciplinary Control Research and Curriculum Development in CPSS: A Case Study with 3D Printing and Social Manufacturing CPSS的跨学科控制研究和课程开发：以3D打印和社会制造为例
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-09-04 DOI: 10.1016/j.ifacol.2025.08.056
Zhen Shen , Hongyu Li , Jing Yang , Xiaojun Wang , Daniel Horti , Martin Ferenc Dömény , Szatmáry Sára , Adina Chotbaeva , Jimei Ma , Zsombor Zrubka , Fei-Yue Wang
{"title":"Interdisciplinary Control Research and Curriculum Development in CPSS: A Case Study with 3D Printing and Social Manufacturing","authors":"Zhen Shen ,&nbsp;Hongyu Li ,&nbsp;Jing Yang ,&nbsp;Xiaojun Wang ,&nbsp;Daniel Horti ,&nbsp;Martin Ferenc Dömény ,&nbsp;Szatmáry Sára ,&nbsp;Adina Chotbaeva ,&nbsp;Jimei Ma ,&nbsp;Zsombor Zrubka ,&nbsp;Fei-Yue Wang","doi":"10.1016/j.ifacol.2025.08.056","DOIUrl":"10.1016/j.ifacol.2025.08.056","url":null,"abstract":"<div><div>This paper presents a novel educational framework that integrates additive manufacturing (3D printing), social manufacturing platforms, large language models (LLMs), iSTREAMS, and iCDIOS to bridge academic learning, industrial practice, and research innovation. The framework adopts a “learning-by-doing” approach, where students engage in project-driven tasks that span 2D-to-3D modeling, material property optimization, and collaborative problem-solving. By leveraging AI tools for design iteration and real-time feedback, students develop competencies in critical thinking, technical execution, and interdisciplinary collaboration. The framework also emphasizes dynamic assessment mechanisms that combine human evaluation with AI-driven analytics to provide personalized feedback and inform curriculum updates. Through this integrated approach, students are equipped with the skills necessary to navigate the complexities of modern Cyber-Physical-Social Systems (CPSS)-driven industries. A case study is provided to demonstrate the framework’s implementation and its potential to foster interdisciplinary control research and curriculum development, highlighting the synergy between iSTREAMS and iCDIOS in enhancing educational outcomes.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 7","pages":"Pages 255-260"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Adapting an Industrial Control Laboratory for Remote Access⁎ 适应远程访问的工业控制实验室
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-09-04 DOI: 10.1016/j.ifacol.2025.08.023
Gabriel Conde , Luis de la Torre , Raquel Dormido , Sebastián Dormido
{"title":"Adapting an Industrial Control Laboratory for Remote Access⁎","authors":"Gabriel Conde ,&nbsp;Luis de la Torre ,&nbsp;Raquel Dormido ,&nbsp;Sebastián Dormido","doi":"10.1016/j.ifacol.2025.08.023","DOIUrl":"10.1016/j.ifacol.2025.08.023","url":null,"abstract":"<div><div>Laboratory-based learning plays a crucial role in engineering education, especially in fields like automation and control. However, traditional industrial training labs often face challenges in terms of both realism and accessibility, limiting students’ exposure to real-world systems. In this paper, we present the transformation of a complex industrial process control plant into a fully remote-operable laboratory. By integrating new advanced hardware elements, we have enabled remote monitoring and control of the system. These modifications offer students industry-level realism and hands-on experience in industrial automation, accessible from any location. This work demonstrates the potential of the industrial remote lab to enhance engineering education by providing a flexible and realistic learning environment.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 7","pages":"Pages 60-65"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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