Article
Computer Science, Interdisciplinary Applications
Dujuan Wang, Jian Peng, Hengfei Yang, T. C. E. Cheng, Yuze Yang
Summary: In this paper, a distributionally robust optimization model (DROM) is proposed for emergency logistics in disaster relief management. The model considers uncertain demand and facility disruptions, and describes their distributions through ambiguity sets. Based on the adaptability and tractability of the ambiguity sets, the model is reformulated as a mixed-integer linear program. An exact algorithm based on Benders decomposition (BD) is proposed to solve the model, along with an in-out Benders cut generation strategy to improve the efficiency.
COMPUTERS & INDUSTRIAL ENGINEERING
(2023)
Article
Management
Hailei Gong, Zhi-Hai Zhang
Summary: The study addresses the pricing and reverse logistics network design problem in remanufacturing with price-dependent return quality uncertainty, proposing a distributionally robust risk-averse model and using a Benders decomposition approach to solve it. Computational experiments show that the distributionally robust model can effectively hedge against high uncertainty, and the enhanced Benders decomposition methods outperform classical counterparts and the off-the-shelf solver Gurobi. Managerial insights and future research directions are also explored.
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
(2022)
Article
Engineering, Chemical
Congqin Ge, Lifeng Zhang, Zhihong Yuan
Summary: This paper proposes a hybrid stochastic and distributionally robust optimization approach to tackle uncertainty and disruptions in the closed-loop supply chain network. By customizing an algorithm, large-scale mixed integer linear programming problems can be solved efficiently. Computational experiments demonstrate the advantages of this approach in terms of costs and variances.
Article
Management
Yongjian Yang, Yunqiang Yin, Dujuan Wang, Joshua Ignatius, T. C. E. Cheng, Lalitha Dhamotharan
Summary: Humanitarian logistics often faces uncertainties in developing a rescue strategy for disasters. In this study, we propose a distributionally robust model (DRM) for the multi-period location-allocation problem in humanitarian logistics. The model is reformulated as a mixed-integer linear program and solved using a branch-and-Benders-cut algorithm. Numerical studies verify the algorithm's performance and demonstrate the value of the DRM in resource allocation decisions.
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
(2023)
Article
Engineering, Industrial
Wouter Lefever, Faycal A. Touzout, Khaled Hadj-Hamou, El-Houssaine Aghezzaf
Summary: This paper discusses the time-constrained inventory routing problem (TCIRP) on a network with uncertain arc travel times, proposing a robust optimization approach with a controlled level of conservatism and developing a Benders' decomposition-based heuristic to cope with the resulting robust counterpart's complexity. The proposed method is compared with two standard approaches and shown to find robust solutions that are not too conservative in reasonable time.
INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH
(2021)
Article
Automation & Control Systems
Yunfan Zhang, Feng Liu, Yifan Su, Yue Chen, Zhaojian Wang, Joao P. S. Catalao
Summary: This paper investigates a class of two-stage robust optimization problems that involve decision-dependent uncertainties. A novel iterative algorithm based on Benders dual decomposition is proposed, which guarantees the computational tractability, robust feasibility and optimality, and convergence performance with theoretical proof. Four motivating application examples that feature decision-dependent uncertainties are provided.
IEEE-CAA JOURNAL OF AUTOMATICA SINICA
(2022)
Article
Management
Yunqiang Yin, Zunhao Luo, Dujuan Wang, T. C. E. Cheng
Summary: Recent research on distributionally robust (DR) machine scheduling has explored different approaches to deal with uncertain processing times. One approach is to use statistical metrics to measure the distance between probability distributions. In this study, we focus on Wasserstein distance-based DR parallel-machine scheduling, where we minimize the worst-case expected total completion time-related cost over all distributions within a Wasserstein ambiguity set.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
(2023)
Article
Economics
Runjie Li, Zheng Cui, Yong-Hong Kuo, Lianmin Zhang
Summary: This study focuses on an inventory routing problem with uncertain demand and various scenarios. The supplier needs to determine visit times, replenishment quantities, and vehicle routes to minimize costs. A scenario-based distributionally robust optimization framework is proposed, which is transformed into a mixed-integer problem and efficiently solved by an algorithm. A case study and computational results demonstrate the effectiveness of the proposed method.
TRANSPORTATION RESEARCH PART E-LOGISTICS AND TRANSPORTATION REVIEW
(2023)
Article
Engineering, Electrical & Electronic
Shahab Dehghan, Petros Aristidou, Nima Amjady, Antonio J. Conejo
Summary: This paper introduces a distributionally robust network-constrained unit commitment model that takes into account uncertainties in demands and renewable energy production. Through a data-driven ambiguity set approach, uncertain parameters are characterized, and non-convex AC power flow equations are approximated using convex quadratic and McCormick relaxations. A new decomposition algorithm is proposed to solve the min-max-min DR-NCUC problem, with the master problem solved using primal and dual cuts, and the max-min sub-problem solved using a primal-dual hybrid gradient method. An active set strategy is also proposed to enhance the tractability of the algorithm by ignoring inactive constraints. Case studies on test systems demonstrate the model's performance in handling uncertainties and the superiority of the proposed decomposition algorithm over other approaches.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Weilun Wang, Mingqiang Wang, Xueshan Han, Ming Yang, Qiuwei Wu, Ran Li
Summary: This paper proposes a distributionally robust transmission expansion planning model that takes into account the uncertainty of contingency probability, and demonstrates the feasibility and effectiveness of the proposed model through experiments on the IEEE RTS system and the IEEE 118-bus system.
JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY
(2022)
Article
Management
Ahmed Saif, Erick Delage
Summary: This study focuses on a distributionally robust version of the capacitated facility location problem, addressing uncertainties in customer demands through various approximation schemes and algorithms. Numerical experiments on benchmark instances demonstrate the efficiency of exact solution algorithms and the performance guarantee of the solutions on out-of-sample data.
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
(2021)
Article
Computer Science, Interdisciplinary Applications
Ruozhen Qiu, Yue Sun, Minghe Sun
Summary: This study develops a distributionally robust optimization approach for inventory decisions for a retailer with limited budget ordering multiple products from multiple suppliers. The problem is formulated as a worst-case expected profit maximization model with a budget constraint, which is transformed into a tractable convex programming model. A closed-form solution for the order quantity using a Lagrange multiplier is proposed.
COMPUTERS & OPERATIONS RESEARCH
(2021)
Article
Economics
Xin Wang, Yong-Hong Kuo, Houcai Shen, Lianmin Zhang
Summary: The study proposes a target-oriented framework for a multi-period location-transportation problem, addressing issues arising from estimating the weights of different objectives in multi-objective optimization approach.
TRANSPORTATION RESEARCH PART B-METHODOLOGICAL
(2021)
Article
Energy & Fuels
Qiangyi Sha, Weiqing Wang, Haiyun Wang
Summary: A distributed robust security-constrained optimization model based on moment uncertainty is proposed to address the stochastic process of wind power and photovoltaic output, with consideration of energy storage. By utilizing a cutting plane method and an improved generalized Benders decomposition algorithm, the model can be effectively solved to obtain unit commitment results with different emphasis on economy and security.
Article
Economics
Yue Zhao, Zhi Chen, Andrew Lim, Zhenzhen Zhang
Summary: This paper studies the vessel deployment problem in the liner shipping industry and proposes a distributionally robust optimization method to address the challenge of fluctuating shipping demands. It provides high-quality solutions and extends to a data-driven model based on the Wasserstein distance.
TRANSPORTATION RESEARCH PART B-METHODOLOGICAL
(2022)
Review
Engineering, Chemical
Qi Zhang, Ignacio E. Grossmann
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2016)
Article
Computer Science, Interdisciplinary Applications
Pedro M. Castro, Ignacio E. Grossmann, Qi Zhang
COMPUTERS & CHEMICAL ENGINEERING
(2018)
Article
Engineering, Chemical
Qi Zhang, Wei Feng
Article
Management
Andrew Allman, Qi Zhang
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
(2020)
Article
Management
Wei Feng, Yiping Feng, Qi Zhang
Summary: This study addresses multistage robust mixed-integer optimization with decision-dependent uncertainty sets, proposing a framework that allows consideration of both continuous and integer recourse. By leveraging recent advances in constructing nonlinear decision rules and introducing discontinuous piecewise linear decision rules for continuous recourse, the authors derive a tractable reformulation of the problem. Computational experiments show that properly modeling endogenous uncertainty and mixed-integer recourse can significantly reduce the conservatism in the solution.
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Hanchu Wang, Matthew Palys, Prodromos Daoutidis, Qi Zhang
Summary: Ammonia plays a crucial role in agriculture and as a carbon-free energy carrier, but it is associated with environmental concerns. Developing a sustainable agricultural system that integrates renewable ammonia production and effective nitrogen management can reduce nitrogen loss and optimize costs.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Biotechnology & Applied Microbiology
Matthew J. Palys, Hanchu Wang, Qi Zhang, Prodromos Daoutidis
Summary: Renewable ammonia production and utilization play a crucial role in improving sustainability in agriculture and energy storage. System engineering can advance the adoption of renewable ammonia in a sustainable, economically competitive, and reliable manner.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2021)
Article
Operations Research & Management Science
Andrew Allman, Qi Zhang
Summary: This work aims to combine the strengths of global mixed-integer nonlinear optimization and branch-and-price, solving a class of nonconvex mixed-integer nonlinear programs effectively. The study shows that using discretization of integer linking variables can lead to the application of Dantzig-Wolfe reformulation and branch-and-price method for solution, which has been underutilized in literature.
JOURNAL OF GLOBAL OPTIMIZATION
(2021)
Article
Engineering, Chemical
Wei Feng, Yiping Feng, Qi Zhang
Summary: In chemical manufacturing processes, equipment degradation can have a significant impact and maintenance planning is crucial. Distributionally robust optimization can address the uncertainty in predictive equipment health models effectively.
Article
Computer Science, Interdisciplinary Applications
Andrew Allman, Che Lee, Mariano Martin, Qi Zhang
Summary: Biomass waste is a naturally occurring agricultural byproduct estimated to have a sustainable extraction rate of about 60 million tons per year. This study proposes a supply chain optimization problem to convert biomass waste to energy using mobile and modular production units, with results showing cost savings of 1-4% in Minnesota and North Carolina. Additionally, the use of mobile modules demonstrates benefits in protecting against uncertainty.
COMPUTERS & CHEMICAL ENGINEERING
(2021)
Article
Biotechnology & Applied Microbiology
Conor M. O'Brien, Qi Zhang, Prodromos Daoutidis, Wei-Shou Hu
Summary: The article discusses the construction of a systems model describing the interactions of major players in cell culture and the optimization of parameters to enhance process understanding and robustness. The optimized model captures the dynamics of metabolism and process variability, attributing part of it to the metabolic state of cell inoculum. The model is also used to identify potential mitigation strategies and explore the effect of changing CO2 removal capacity on process performance.
METABOLIC ENGINEERING
(2021)
Article
Chemistry, Physical
M. Alexander Ardagh, Turan Birol, Qi Zhang, Omar A. Abdelrahman, Paul J. Dauenhauer
CATALYSIS SCIENCE & TECHNOLOGY
(2019)
Article
Chemistry, Multidisciplinary
M. Alexander Ardagh, Manish Shetty, Anatoliy Kuznetsov, Qi Zhang, Phillip Christopher, Dionisios G. Vlachos, Omar A. Abdelrahman, Paul J. Dauenhauer
Article
Computer Science, Interdisciplinary Applications
Nohan Joemon, Melpakkam Pradeep, Lokesh K. Rajulapati, Raghunathan Rengaswamy
Summary: This paper introduces a smoothing-based approach for discovering partial differential equations from noisy measurements. The method is data-driven and improves performance by incorporating first principles knowledge. The effectiveness of the algorithm is demonstrated in a real system using a new benchmark metric.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
Zhibin Lu, Yimeng Li, Chang He, Jingzheng Ren, Haoshui Yu, Bingjian Zhang, Qinglin Chen
Summary: This study proposes a new inverse design method using a physics-informed neural network to identify optimal heat sink designs. A hybrid PINN accurately approximates the governing equations of heat transfer processes, and a surrogate model is constructed for integration with optimization algorithms. The proposed method accelerates the search for Pareto-optimal designs and reduces search time. Comparing different scenarios facilitates real-time observation of multiphysics field changes, improving understanding of optimal designs.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
Luca Gasparini, Antonio Benedetti, Giulia Marchese, Connor Gallagher, Pierantonio Facco, Massimiliano Barolo
Summary: In this paper, a method for batch process monitoring with limited historical data is investigated. The methodology utilizes machine learning algorithms to generate virtual data and combines it with real data to build a process monitoring model. Automatic procedures are developed to optimize parameters, and indicators and metrics are proposed to assist virtual data generation activities.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
Julia Jimenez-Romero, Adisa Azapagic, Robin Smith
Summary: Energy transition is a significant and complex challenge for the industry, and developing cost-effective solutions for synthesizing utility systems is crucial. The research combines mathematical formulation with realistic configurations and conditions to represent utility systems and provides a basis for synthesizing energy-efficient utility systems for the future.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
Samuel Adeyemo, Debangsu Bhattacharyya
Summary: This work develops algorithms for estimating sparse interpretable data-driven models. The algorithms select the optimal basis functions and estimate the model parameters using Bayesian inferencing. The algorithms estimate the noise characteristics and model parameters simultaneously. The algorithms also exploit prior analysis and special properties for efficient pruning, and use a modified Akaike information criterion for model selection.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
Abbasali Jafari-Nodoushan, Mohammad Hossein Dehghani Sadrabadi, Maryam Nili, Ahmad Makui, Rouzbeh Ghousi
Summary: This study presents a three-objective model to design a forward supply chain network considering interrelated operational and disruptive risks. Several strategies are implemented to cope with these risks, and a joint pricing strategy is used to enhance the profitability of the supply chain. The results show that managing risks and uncertainties simultaneously can improve sustainability goals and reduce associated costs.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
T. A. Espaas, V. S. Vassiliadis
Summary: This paper extends the concept of higher-order search directions in interior point methods to convex nonlinear programming. It provides the mathematical framework for computing higher-order derivatives and highlights simplified computation for special cases. The paper also introduces a dimensional lifting procedure for transforming general nonlinear problems into more efficient forms and describes the algorithmic development required to employ these higher-order search directions.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
David A. Linan, Gabriel Contreras-Zarazua, Eduardo Sanhez-Ramirez, Juan Gabriel Segovia-Hernandez, Luis A. Ricardez-Sandoval
Summary: This study proposes a parallel hybrid algorithm for optimal design of process flowsheets, which combines stochastic method with deterministic algorithm to achieve faster and improved convergence.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
Xiaoyong Lin, Zihui Li, Yongming Han, Zhiwei Chen, Zhiqiang Geng
Summary: A novel GAT-LSTM model is proposed for the production prediction and energy structure optimization of propylene production processes. It outperforms other models and can provide the optimal raw material scheme for actual production processes.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
Prodromos Daoutidis, Jay H. Lee, Srinivas Rangarajan, Leo Chiang, Bhushan Gopaluni, Artur M. Schweidtmann, Iiro Harjunkoski, Mehmet Mercangoz, Ali Mesbah, Fani Boukouvala, Fernando Lima, Antonio del Rio Chanona, Christos Georgakis
Summary: This paper provides a concise perspective on the potential of machine learning in the PSE domain, based on discussions and talks during the FIPSE 5 conference. It highlights the need for domain-specific techniques in molecular/material design, data analytics, optimization, and control.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
Hesam Hassanpour, Prashant Mhaskar, Brandon Corbett
Summary: This work addresses the problem of designing an offset-free implementable reinforcement learning (RL) controller for nonlinear processes. A pre-training strategy is proposed to provide a secure platform for online implementations of the RL controller. The efficacy of the proposed approach is demonstrated through simulations on a chemical reactor example.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
Hunggi Lee, Donghyeon Lee, Jaewook Lee, Dongil Shin
Summary: This study introduces an innovative framework that utilizes a limited number of sensors to detect chemical leaks early, mitigating the risk of major industrial disasters, and providing faster and higher-resolution results.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
Sibel Uygun Batgi, Ibrahim Dincer
Summary: This study examines the environmental impacts of three alternative hydrogen-generating processes and determines the best environmentally friendly option for hydrogen production by comparing different impact categories. The results show that the solar-based HyS cycle options perform the best in terms of global warming potential, abiotic depletion, acidification potential, ozone layer depletion, and human toxicity potential.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
LaGrande Gunnell, Bethany Nicholson, John D. Hedengren
Summary: A review of current trends in scientific computing shows a shift towards open-source and higher-level programming languages like Python, with increasing career opportunities in the next decade. Open-source modeling tools contribute to innovation in equation-based and data-driven applications, and the integration of data-driven and principles-based tools is emerging. New compute hardware, productivity software, and training resources have the potential to significantly accelerate progress, but long-term support mechanisms are still necessary.
COMPUTERS & CHEMICAL ENGINEERING
(2024)
Article
Computer Science, Interdisciplinary Applications
Daniel Cristiu, Federico d'Amore, Fabrizio Bezzo
Summary: This study presents a multi-objective mixed integer linear programming framework to optimize the supply chain for mixed plastic waste in Northern Italy. Results offer quantitative insights into economic and environmental performance, balancing trade-offs between maximizing gross profit and minimizing greenhouse gas emissions.
COMPUTERS & CHEMICAL ENGINEERING
(2024)