Gaussian Process

Sample and Computationally Efficient Stochastic Kriging in High Dimensions featured image

Sample and Computationally Efficient Stochastic Kriging in High Dimensions

Stochastic kriging has been widely employed for simulation metamodeling to predict the response surface of complex simulation models. However, its use is limited to cases where the …

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Liang Ding

Knowledge Gradient for Selection with Covariates: Consistency and Computation

Knowledge gradient is a design principle for developing Bayesian sequential sampling policies to consider in this paper the ranking and selection problem in the presence of …

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Liang Ding

Surrogate-Based Simulation Optimization

Simulation models are widely used in practice to facilitate decision making in a complex, dynamic and stochastic environment. But they are computationally expensive to execute and …

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L. Jeff Hong
High-Dimensional Simulation Optimization via Brownian Fields and Sparse Grids featured image

High-Dimensional Simulation Optimization via Brownian Fields and Sparse Grids

High-dimensional simulation optimization is notoriously challenging. We propose a new sampling algorithm that converges to a global optimal solution and suffers minimally from the …

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Liang Ding

A Scalable Approach to Enhancing Stochastic Kriging with Gradients

It is known that incorporating gradient information can significantly enhance the prediction accuracy of stochastic kriging. However, such an enhancement cannot be scaled trivially …

Haojun Huo

Enhancing Stochastic Kriging for Queueing Simulation with Stylized Models

Stochastic kriging is a popular metamodeling technique to approximate computationally expensive simulation models. However, it typically treats the simulation model as a black box …

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Haihui Shen

Scalable Stochastic Kriging with Markovian Covariances

Stochastic kriging is a popular technique for simulation metamodeling due to its flexibility and analytical tractability. Its computational bottleneck is the inversion of a …

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Liang Ding

Stochastic Kriging for Inadequate Simulation Models

Stochastic kriging is a popular metamodeling technique for representing the unknown response surface of a simulation model. However, the simulation model may be inadequate in the …

Lu Zou

Simulation Metamodeling in the Presence of Model Inadequacy

A simulation model is often used as a proxy for the real system of interest in a decision-making process. However, no simulation model is totally representative of the reality. The …

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Xiaowei Zhang