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Well-posedness of a class of infinite-dimensional port-Hamiltonian systems with boundary control and observation⁎ 一类具有边界控制和观测的无限维port- hamilton系统的适定性
Q3 Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.08.074
Bouchra Elghazi , Birgit Jacob , Hans Zwart
We characterize the well-posedness of a class of infinite-dimensional port-Hamiltonian systems with boundary control and observation. This class includes in particular the Euler-Bernoulli beam equations and more generally 1D linear infinite-dimensional port-Hamiltonian systems with boundary control and observation as well as coupled systems. It is known, that for the Timoshenko beam models internal well-posedness implies well-posedness of the overall system. By means of an example we show that this is not true for the Euler-Bernoulli beam models. An easy verifiable equivalent condition for well-posedness of the overall system will be presented. We will conclude the paper by applying the obtained results to several Euler-Bernoulli beam models.
我们刻画了一类具有边界控制和观测的无限维波特-哈密顿系统的适定性。本课程特别包括欧拉-伯努利梁方程和更一般的具有边界控制和观测以及耦合系统的一维线性无限维波特-哈密顿系统。众所周知,对于Timoshenko梁模型,内部适定性意味着整个系统的适定性。通过一个例子,我们证明了这对于欧拉-伯努利梁模型是不成立的。给出了整个系统适定性的一个容易验证的等价条件。我们将通过将所得结果应用于几个欧拉-伯努利梁模型来结束本文。
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引用次数: 0
Modeling floating bodies in shallow water⁎ 浅水浮体建模
Q3 Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.08.076
Maddalen Irigoien Kortabitarte , George Weiss
We study the motion of a floating rigid body in shallow waters using the Lagrangian formalism and Hamilton’s principle. For simplicity, the rigid body is assumed to be constrained to move only in the vertical direction and the boundary of the rigid body which is in contact with the fluid, the so-called wetted surface cw, is assumed to be the graph of a function. Equations of motion are derived in this way for a general function cw and later applied to the particular case when cw is given by a parabola centered at the origin.
利用拉格朗日形式论和哈密顿原理研究了浮刚体在浅水中的运动。为简单起见,假定刚体受约束只在垂直方向上运动,并且假定刚体与流体接触的边界,即所谓的湿曲面cw,是一个函数的图形。用这种方法推导出一般函数cw的运动方程,然后应用于cw由以原点为中心的抛物线给出的特殊情况。
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引用次数: 0
Boundary feedback control of a 2x2 weakly hyperbolic system: Lyapunov-based approach 2x2弱双曲系统的边界反馈控制:基于lyapunov的方法
Q3 Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.08.083
M.O. Amirat , V. Andrieu , J. Auriol , M. Bajodek , C. Valentin
In this paper, we propose a feedback boundary control law that ensures the exponential stability of a class of hyperbolic systems characterized by a non-diagonalizable principal part and nonuniform coefficients, as encountered in sedimentation processes and elasticity theory. We establish sufficient conditions for the exponential stability of the closed-loop system. A numerical example is presented to illustrate the effectiveness of the proposed Lyapunov-based stability analysis.
在本文中,我们提出了一个反馈边界控制律,它保证了一类在沉积过程和弹性理论中遇到的具有不可对角的主部和非均匀系数的双曲型系统的指数稳定性。建立了闭环系统指数稳定的充分条件。最后给出了一个数值算例,说明了所提出的基于李雅普诺夫的稳定性分析方法的有效性。
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引用次数: 0
State estimation for stochastic parabolic systems: A two-step estimation method⁎ 随机抛物型系统的状态估计:一种两步估计方法
Q3 Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.08.066
Yu Gao , Kai-Ning Wu
This paper proposes a novel two-step interval estimation-based state estimation scheme for a class of stochastic parabolic systems. Peak-to-peak analysis is introduced to solve the difficulties generated by the spatiotemporal characteristic and the multidimensional nature. Based on the two-step interval estimation method, the adaptive thresholds of the mathematical expectation of the system state are obtained. Numerical simulation is adopted to show the effectiveness of the proposed method.
针对一类随机抛物型系统,提出了一种新的基于两步区间估计的状态估计方法。引入峰对峰分析,解决了由于时空特征和多维性所带来的困难。基于两步区间估计方法,得到了系统状态数学期望的自适应阈值。通过数值仿真验证了该方法的有效性。
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引用次数: 0
Heat Recovery Strategies in Logistic Warehouses and Data Centers for Sustainable Residential Heating 可持续住宅供暖的物流仓库和数据中心热回收策略
Q3 Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.09.023
Sakji Imen, Ndhaief Nadia, Rezg Nidhal
This study focuses on addressing the growing scarcity of natural resources by exploring strategies for conservation and recycling in energy systems. With increasing pressure on energy supplies and environmental sustainability, the recovery and reuse of waste heat present viable solutions to reduce reliance on traditional resources. This approach emphasizes sustainable development by rethinking energy use in residential heating systems, promoting efficient utilization, and minimizing waste. The results indicate a significant decrease in auxiliary heating consumption, replaced by recovered heating. By integrating heat recovery systems, the study highlights the potential for reducing energy consumption and contributing to a more sustainable and resource-conscious future.
本研究的重点是通过探索能源系统的保护和回收战略来解决自然资源日益短缺的问题。随着能源供应和环境可持续性压力的增加,废热的回收和再利用是减少对传统资源依赖的可行解决方案。这种方法强调可持续发展,通过重新思考住宅供暖系统的能源使用,促进有效利用,并尽量减少浪费。结果表明,辅助采暖消耗显著减少,取而代之的是回收采暖。通过整合热回收系统,该研究强调了降低能源消耗的潜力,并有助于实现更可持续和更注重资源的未来。
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引用次数: 0
Sustained Success or Fading Spark? – Long-term Assessment of Participatory Order Assignments in a Warehouse Environment 持续的成功还是褪色的火花?-仓库环境中参与式订单分配的长期评估
Q3 Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.09.002
Thomas De Lombaert , Kris Braekers , René De Koster , Katrien Ramaekers
Order picking, a key warehouse process, is known to be costly, monotonous, and tightly regulated by a central planning system. Recent studies have explored a way to mitigate the negative impacts of order picking; they experimentally investigated the feasibility and effects of a participatory order assignment (POA) system, which allows workers to choose their next order and break the monotony rather than being confronted with top-down systemic assignments. Thus far, studies have mainly looked at the effects on productivity and psychosocial and physical well-being shortly after such an autonomy-increasing system redesign, yet little is known about the longevity of these effects. The existing literature emphasises the need for evaluations that go beyond short-term findings to assess effects over a sustained period. The degree to which the observed effects persist over time significantly impacts potential adoption by practitioners. By conducting a unique field experiment in a real-world warehouse, this paper assesses the effects of a POA system over a period of 6 months and finds that the initially observed effects persist over time. We enhance the existing body of literature by providing evidence that POA systems are not only effective, but they also yield long-lasting effects.
拣货是仓库的一个关键流程,众所周知,它成本高、单调,而且受到中央计划系统的严格监管。最近的研究探索了一种减轻订单选择负面影响的方法;他们实验研究了参与式订单分配(POA)系统的可行性和效果,该系统允许员工选择他们的下一个订单,打破单调,而不是面对自上而下的系统分配。到目前为止,研究主要关注的是在这种增强自主性的系统重新设计后不久对生产力、社会心理和身体健康的影响,但对这些影响的持续时间知之甚少。现有文献强调需要进行超越短期结果的评估,以评估持续时期的影响。观察到的效果持续一段时间的程度显著影响从业者的潜在采用。通过在现实世界的仓库中进行独特的现场实验,本文评估了POA系统在6个月期间的效果,并发现最初观察到的效果会随着时间的推移而持续存在。我们通过提供证据来证明POA系统不仅有效,而且还能产生持久的效果,从而增强了现有的文献。
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引用次数: 0
Empirical analysis of factors contributing to deviations from routing guidelines in order picking: a case study 在订单挑选中导致偏离路线指南的因素的实证分析:一个案例研究
Q3 Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.09.006
Aïcha Leroy , An Caris , Benoît Depaire , Teun van Gils , Kris Braekers
Order picking remains a time-sensitive operation in warehousing, with pickers following predetermined routes. Previous research identified potential drivers for deviations from these routes through qualitative studies or descriptive data analysis. We take a novel approach by applying a statistical analysis on two years of data (i.e., 2 448 000 picks). Our mixed-effects logistic regression model shows that factors such as workload, picks completed, congestion and aisle layout may significantly affect the likelihood of route deviations. Such deviations could significantly reduce route efficiency. These insights highlight the need to integrate real-world dynamics into routing models, aiming to enhance overall efficiency in warehouse operations.
在仓储中,拣货仍然是一项时间敏感的操作,拣货人员按照预定的路线拣货。以前的研究通过定性研究或描述性数据分析确定了偏离这些路线的潜在驱动因素。我们采用了一种新颖的方法,对两年的数据(即2448000个选择)进行统计分析。我们的混合效应logistic回归模型表明,工作量、拣货完成情况、拥堵情况和通道布局等因素会显著影响航线偏离的可能性。这种偏差会显著降低航线效率。这些见解强调了将现实世界的动态集成到路由模型中的必要性,旨在提高仓库操作的整体效率。
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引用次数: 0
Reimagining Salmon Supply Chains: A Sustainability Comparison of 3D-Printed and Traditional Production 重塑鲑鱼供应链:3d打印和传统生产的可持续性比较
Q3 Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.09.046
Wenqi Li , Banu Y. Ekren , Emel Aktas
The seafood industry faces growing sustainability challenges, including overfishing, resource inefficiency, and environmental degradation, necessitating innovative production alternatives. While traditional SCs benefit from established infrastructure and consumer trust, their high resource demand and operational inefficiencies highlight the need for sustainable alternatives. This study compares traditional and 3D-printed salmon SCs, using process mapping by flowcharting and sustainability metrics to evaluate their environmental, economic, and social impacts. Findings indicate that 3D-printed salmon reduces carbon emissions by up to 86% and freshwater consumption by 95%, primarily by eliminating farming, feed production, and long-distance cold storage. Additionally, localized production lowers logistical costs and enhances resource efficiency. Despite challenges related to consumer acceptance, regulatory approval, and scalability, 3D printing presents a promising complement to aquaculture, supporting long-term sustainability in seafood production.
海产品行业面临着日益严峻的可持续性挑战,包括过度捕捞、资源效率低下和环境退化,需要创新的生产替代品。虽然传统的SCs受益于现有的基础设施和消费者的信任,但它们对资源的高需求和运营效率低下凸显了对可持续替代方案的需求。本研究比较了传统的和3d打印的三文鱼SCs,通过流程图和可持续性指标来评估它们对环境、经济和社会的影响。研究结果表明,3d打印鲑鱼可以减少高达86%的碳排放和95%的淡水消耗,主要是通过消除养殖、饲料生产和长途冷藏。此外,本地化生产降低了物流成本,提高了资源效率。尽管在消费者接受度、监管批准和可扩展性方面存在挑战,但3D打印对水产养殖来说是一个有希望的补充,支持海鲜生产的长期可持续性。
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引用次数: 0
A Hybrid Stacking-Bayesian Model for Defect Detection in the Lithium-Ion Battery Industry 锂离子电池工业缺陷检测的混合堆叠-贝叶斯模型
Q3 Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.09.017
Mehdi Foumani , Samaneh Azarakhsh , Arezoo Dahesh , AmirReza Tajally , Reza Tavakkoli-Moghaddam , Behdin Vahedi-Nouri
A defect Lithium-ion battery defect detection is critical due to the widespread use of these batteries. Ensuring their safety and performance is essential, as defects can lead to serious issues, such as overheating and explosions. Early defect detection enhances battery reliability, extends lifespan, and reduces manufacturing costs by mitigating warranty claims and recalls. This paper presents a machine learning-based framework for detecting defects in lithium-ion batteries used in neon signs. Our approach combines various ensemble classification algorithms as base estimators for final stacking meta-learners. A Genetic Algorithm (GA) is used for feature selection, followed by model optimization using Bayesian hyperparameter tuning. Stacking methods with Multi-Layer Perceptron (MLP) and Support Vector Machine (SVM) as meta-learners are employed to enhance classification accuracy for defect detection in lithium-ion batteries used in neon panels. Our Hybrid Stacking-Bayesian (HSB) approach demonstrates the effectiveness of these models in accurately identifying defective batteries, contributing to improved manufacturing quality control and sustainability by minimizing waste and optimizing resource utilization. Implementing our model on real lithium-ion battery data showcases its potential for practical applications in the industry.
由于锂离子电池的广泛使用,缺陷检测至关重要。确保它们的安全和性能至关重要,因为缺陷可能导致严重问题,如过热和爆炸。早期缺陷检测提高了电池的可靠性,延长了寿命,并通过减少保修索赔和召回来降低制造成本。本文提出了一种基于机器学习的框架,用于检测霓虹灯用锂离子电池的缺陷。我们的方法结合了各种集成分类算法作为最终堆叠元学习器的基估计器。首先利用遗传算法进行特征选择,然后利用贝叶斯超参数优化模型。采用多层感知机(MLP)和支持向量机(SVM)作为元学习器的叠加方法,提高霓虹灯面板用锂离子电池缺陷检测的分类精度。我们的混合堆叠-贝叶斯(HSB)方法证明了这些模型在准确识别缺陷电池方面的有效性,通过减少浪费和优化资源利用,有助于提高制造质量控制和可持续性。在真实锂离子电池数据上实施我们的模型,展示了它在行业实际应用中的潜力。
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引用次数: 0
Leveraging Additive Manufacturing for Inventory Optimization: A Dual-Sourcing Model for Cost and Performance Enhancement in Retail Supply Chains 利用增材制造优化库存:提高零售供应链成本和绩效的双源模型
Q3 Engineering Pub Date : 2025-01-01 DOI: 10.1016/j.ifacol.2025.09.047
Banu Yetkin Ekren , Sara Perotti , Matteo Finelli
This study examines the integration of additive manufacturing (AM), specifically 3D printing (3DP), into retail supply chains to optimize inventory costs while maintaining high service levels (CSL ≥ 95%). A dual-sourcing inventory model is developed, balancing demand between traditional suppliers and in-house 3DP production. The model, solved using Microsoft Excel Solver, incorporates economic order quantity (EOQ), economic production quantity (EPQ), and reorder points to minimize total costs. Experimental results show that hybrid sourcing with 3DP reduces inventory costs, particularly at higher demand levels, while capacity constraints limit full adoption. Findings suggest that retailers should invest in AM expansion to maximize cost efficiency. This study provides a data-driven framework for hybrid inventory strategies and highlights future research directions in demand uncertainty, queueing effects, and advanced optimization techniques.
本研究探讨了将增材制造(AM),特别是3D打印(3DP)整合到零售供应链中,以优化库存成本,同时保持高服务水平(CSL≥95%)。开发了一种双源库存模型,平衡了传统供应商和内部3d打印生产之间的需求。该模型采用Microsoft Excel求解器求解,将经济订货量(EOQ)、经济生产数量(EPQ)和再订货点结合起来,使总成本最小化。实验结果表明,混合采购与3d打印降低了库存成本,特别是在需求较高的情况下,而产能限制限制了完全采用。研究结果表明,零售商应该投资于AM扩张,以最大限度地提高成本效率。本研究为混合库存策略提供了一个数据驱动的框架,并强调了未来在需求不确定性、排队效应和高级优化技术方面的研究方向。
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引用次数: 0
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