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ACM Transactions on Modeling and Computer Simulation (TOMACS), Volume 26 Issue 4, May 2016

Research Challenges in Parallel and Distributed Simulation
Richard M. Fujimoto
Article No.: 22
DOI: 10.1145/2866577

The parallel and distributed simulation field has evolved and grown from its origins in the 1970s and 1980s and remains an active field of research to this day. A brief overview of research in the field is presented. Future research topics are...

A Large-Deviation-Based Splitting Estimation of Power Flow Reliability
Wander S. Wadman, Daan T. Crommelin, Bert P. Zwart
Article No.: 23
DOI: 10.1145/2875342

Given the continued integration of intermittent renewable generators in electrical power grids, connection overloads are of increasing concern for grid operators. The risk of an overload due to injection variability can be described mathematically...

Actor-Critic Algorithms with Online Feature Adaptation
K. J. Prabuchandran, Shalabh Bhatnagar, Vivek S. Borkar
Article No.: 24
DOI: 10.1145/2868723

We develop two new online actor-critic control algorithms with adaptive feature tuning for Markov Decision Processes (MDPs). One of our algorithms is proposed for the long-run average cost objective, while the other works for discounted cost MDPs....

Efficient Flattening Algorithm for Hierarchical and Dynamic Structure Discrete Event Models
Jang Won Bae, Sang Won Bae, Il-Chul Moon, Tag Gon Kim
Article No.: 25
DOI: 10.1145/2875356

Discrete event models are widely used to replicate, analyze, and understand complex systems. DEVS (Discrete Event System Specification) formalism enables hierarchical modeling, so it provides an efficiency in the model development of complex...

Automatic Moment-Closure Approximation of Spatially Distributed Collective Adaptive Systems
Cheng Feng, Jane Hillston, Vashti Galpin
Article No.: 26
DOI: 10.1145/2883608

Spatially distributed collective adaptive systems are an important class of systems that pose significant challenges to modeling due to the size and complexity of their state spaces. This problem is acute when the dynamic behavior of the system...

Replicated Computational Results (RCR) Report for “Automatic Moment-Closure Approximation of Spatially Distributed Collective Adaptive Systems”
Alexander Lück
Article No.: 27
DOI: 10.1145/2893479

“Automatic Moment-Closure Approximation of Spatially Distributed Collective Adaptive Systems” by Feng, Hilston, and Galpin presents detailed simulation analysis results for three models of spatially distributed collective adaptive...

Real-Time Crowd Simulation Integrating Potential Fields and Agent Method
Guanghui Lu, Leiting Chen, Weiping Luo
Article No.: 28
DOI: 10.1145/2885496

Crowd simulation is studied extensively in computer graphics, animation, and safety. A real-time crowd simulator has been developed based on potential fields and agent approach in this article. This simulator produces realistic complex...