The proceedings contain 346 papers. The topics discussed include: ARD: an automated replication-deletion method for simulation analysis;low-storage online estimators for quantiles and densities;linking statistical est...
ISBN:
(纸本)9781479939503
The proceedings contain 346 papers. The topics discussed include: ARD: an automated replication-deletion method for simulation analysis;low-storage online estimators for quantiles and densities;linking statistical estimation and decision making through simulation;stochastic kriging with qualitative factors;density estimation of simulation output using exponential EPI-splines;have we really been analyzing terminating simulations incorrectly all these years?;on the solution of stochastic optimization problems in imperfect information regimes;robust selection of the best;ranking and selection in a high performance computing environment;the knowledge gradient algorithm using locally parametric approximations;adaptive simulation budget allocation for determining the best design;R-spline for local integer-ordered simulation optimization problems with stochastic constraints;and upper bounds on the Bayes-optimal procedure for ranking & selection with independent normal priors.
With the rapid advancements in modern computing technologies, simulation has been increasingly adopted to model complex real-world systems. Yet, such digital computational power remains underutilized in decision-makin...
ISBN:
(纸本)9798331534202
With the rapid advancements in modern computing technologies, simulation has been increasingly adopted to model complex real-world systems. Yet, such digital computational power remains underutilized in decision-making tasks, mainly due to the difficulties in integrating gray or black box simulation models with algebraic optimization. In this study, we address this by proposing a novel and generic simulation-infused optimization approach. Through decomposition, nonlinear subsystems are surrogated by simulation and approximated by cutting planes in a row generation algorithm for holistic optimization. Exploration and exploitation are introduced to the row generation algorithm via a novel parametric method. The proposed simulation-infused decomposition approach is applied to a multi-depot vehicle routing problem. Proof-of-concept experiments are conducted to validate the performance against benchmarks, showing drastic reductions in computational time and improvements upon conventional optimization methods when real-world nonlinear systems are involved.
In this paper, we investigate the use of Generative Adversarial Networks (GAN) to model agent behavior in agent-based models. We hereby focus on use cases in which an agent's decision-making process may only be mo...
ISBN:
(纸本)9798331534202
In this paper, we investigate the use of Generative Adversarial Networks (GAN) to model agent behavior in agent-based models. We hereby focus on use cases in which an agent's decision-making process may only be modeled from data, but it is infeasible to be modeled causally. In these situations, meta-models are often the only way to quantitatively parameterize the agent-based model. However, methods that capture not only deterministic relationships but also stochastic uncertainty are rare. Since GANs are well known for their property to generate pseudo-random-numbers for complex distributions, we explore pros and cons of this strategy for modeling a delay-process in a large-scale agent-based SARS-CoV-2 simulation model.
This paper presents an integrated approach to enhancing situational awareness and decision-making in dynamic environments by combining optical-flow-based Markov Decision Processes (MDP) with physics-based simulations ...
ISBN:
(纸本)9798331534202
This paper presents an integrated approach to enhancing situational awareness and decision-making in dynamic environments by combining optical-flow-based Markov Decision Processes (MDP) with physics-based simulations for proactive surveillance system design. By utilizing optical flow for real-time motion detection and analysis, our framework achieves immediate comprehension of environmental changes, which is essential for autonomous navigation and surveillance applications. Additionally, the framework employs MDP to model and resolve decision-making problems where outcomes are partly random and partly controlled by the decision-maker, optimizing actions based on predicted future states. The model was validated through Hardware-in-the-loop (HITL) simulations, providing a detailed understanding of the physical phenomena influencing the system. This ensures that decisions are data-driven and customized to specific situations and missions. Our approach offers a comprehensive understanding of system integration with AI, along with real-time analysis and decision-making capabilities, thereby advancing the simulation modeling methodology for engaging with complex, dynamic environments.
Milk and beef production is crucial to ensure a cost-effective and sustainable food supply. As the demand for agricultural products increases, making informed decisions are critical. Discrete event simulation, a suita...
ISBN:
(纸本)9798331534202
Milk and beef production is crucial to ensure a cost-effective and sustainable food supply. As the demand for agricultural products increases, making informed decisions are critical. Discrete event simulation, a suitable tool for modeling many complex systems with random variability, offers substantial advantages compared with traditional analytical models. We developed a discrete event simulation model for a dairy herd. The model is shown useful for studying various culling strategies based on disease or reproductive performance. We perform a preliminary validation of the model by comparing steady state behavior to analytical results from a Markov chain model and literature. Our findings demonstrate that twin calving does not significantly affect herd performance. We advocate the use of discrete event simulation integrated in smart management tools, emphasizing its usefulness in decision-making on dairy farms. In future research, we are exploring additional factors such as abortion, mortality, and time variable periods for state variables.
This paper introduces simulation using Diffusion process (SimDiff), a novel framework for automated modeling and generation of stochastic discrete-event simulation (DES) input distributions, addressing the high entry ...
ISBN:
(纸本)9798331534202
This paper introduces simulation using Diffusion process (SimDiff), a novel framework for automated modeling and generation of stochastic discrete-event simulation (DES) input distributions, addressing the high entry barrier and challenges associated with obtaining accurate input data. Traditional DES models often rely on simplifying assumptions, such as Poisson and Exponential distributions, which may not fully capture the complexity of real-world systems. We propose SimDiff to overcome these limitations by utilizing the denoising probabilistic diffusion model, a generative neural network capable of learning complex statistical distributions and efficiently sampling from them. Additionally, we introduce SimDiff-ConvTrans, an extension that incorporates Transformer and Convolution components for simulating non-i.i.d inputs. Our experiments demonstrate the effectiveness of SimDiff in handling simple and hybrid data distributions, as well as empirical datasets. SimDiff represents a significant advancement in simplifying the stochastic simulation process, making it more accessible and efficient for users across various expertise levels.
The urban environment is becoming increasingly more connected and complex. In the coming decades, we will be surrounded by billions of sensors, devices, and machines, the Internet of Things (IoT). As the world becomes...
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ISBN:
(纸本)9781728132839
The urban environment is becoming increasingly more connected and complex. In the coming decades, we will be surrounded by billions of sensors, devices, and machines, the Internet of Things (IoT). As the world becomes more connected, we will become dependent on machines and simulation to make decisions on our behalf. When simulation systems use data from sensors, devices and machines (i.e., things) to make decisions, they need to learn how to trust that data, as well as the things they are interacting with. As embedded simulation becomes more commonplace in IoT and smart city applications, it is essential that decision makers are able to trust the simulation systems makingdecisions on their behalf. This paper looks at trust from an IoT perspective, describing a set of research projects conducted that span multiple dimensions of trust, and discusses whether these concepts of trust apply to simulation.
Models that are built to help make decisions usually involve input parameters, which need to be estimated statistically using data. However, submitting these estimated parameters directly to the model may result in bi...
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ISBN:
(纸本)9781479939503;9781479920778
Models that are built to help make decisions usually involve input parameters, which need to be estimated statistically using data. However, submitting these estimated parameters directly to the model may result in biased decisions because the estimated parameters are biased or the model is nonlinear. We propose a new parameter estimator called simulation-Based Inverse Estimator (SBIE) to link the statistical estimation and decision making together. The linkage is achieved by simulating the model and adjusting the estimated parameters such that the adjusted parameters can adapt to the specific model. We prove that SBIE can provide us with consistent and unbiased decisions under some conditions and this result is supported by numerical experiments in queuing models.
Much effort goes into building and validating simulation models. Similar care is necessary in the use of the model to support decision making. Good simulation experiment design is important to get useful and valid ins...
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ISBN:
(纸本)9781479939503;9781479920778
Much effort goes into building and validating simulation models. Similar care is necessary in the use of the model to support decision making. Good simulation experiment design is important to get useful and valid insights for specific management questions. This introductory tutorial gives an overview of experiment design techniques for justifying and planning a series of simulation runs to uncover the impact of system design parameters on simulation output performance. Graphical methods are emphasized.
In this paper, we study Make-to-stock, Assemble-to-order, and Make-to-order decisions in semiconductor supply chains. We propose a genetic algorithm to support such decisions. Discrete-event simulation is used to esti...
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ISBN:
(纸本)9781479939503;9781479920778
In this paper, we study Make-to-stock, Assemble-to-order, and Make-to-order decisions in semiconductor supply chains. We propose a genetic algorithm to support such decisions. Discrete-event simulation is used to estimate the profit-based objective function taking into account the stochastic behavior of the supply chain. We perform computational experiments with a simplified semiconductor supply chain model. It is shown that the proposed heuristic outperforms simple partitioning heuristics based on product characteristics.
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