The decision and control problem for swarm operations is crucial for autonomous military conflict management. In this article, the underlying decision and control problem is treated as a noncooperative game problem, i...
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The decision and control problem for swarm operations is crucial for autonomous military conflict management. In this article, the underlying decision and control problem is treated as a noncooperative game problem, in which the underlying target assignment problem is generalized to be a graph-theoretic problem. We introduce an algorithm to seek the desired Nash equilibrium with the help of the parallel maximum weight matching algorithm. Then, we prove that the proposed solution is epsilon-Nash with guaranteed computational efficiency, and is well suited for the swarm conflict. Simulation results verified the effectiveness of the proposed solutions.
Policy space response oracle (PSRO) is a population-based algorithm that can be used to solve two-player zero-sum games. In the PSRO solution framework, optimizing policy diversity is crucial for addressing nontransit...
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Policy space response oracle (PSRO) is a population-based algorithm that can be used to solve two-player zero-sum games. In the PSRO solution framework, optimizing policy diversity is crucial for addressing nontransitive game problems, helping the agent population avoid exploitation by unfamiliar opponents. In addition, while deep reinforcement learning is highly effective in solving complex game environments, its integration with PSRO remains fragmented and lacking in effective coordination. In this study, we propose distributed PSRO to efficiently solve complex game scenarios. To enhance diversity while managing optimization costs, we introduce TOP-K truncation, which prioritizes high-quality opponents and limits the size of the policy pool during sampling. This approach not only reduces interference from less effective strategies but also ensures computational efficiency by seamlessly integrating with our distributed training framework. We also design the distributed training framework to incorporate diversity estimation directly into the sampling process, achieving diversity optimization without incurring additional computational overhead. Furthermore, we introduce the opponent first (OF) method, which enhances decision-making by leveraging opponent information during interaction sampling. We perform experimental validation using a nontransitive mixture model and AlphaStar888 to confirm the effectiveness of the TOP-K truncation approach. Finally, we demonstrate the feasibility and efficiency of the distributed training framework and the OF approach in a Google Research Football 11 versus 11 scenario.
In this letter, a model-driven detector called IEP-GNN is proposed for massive multiple-input and multiple-output (MIMO) systems. Graph neural network (GNN) and improved moment matching (IMM) are integrated into the e...
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In this letter, a model-driven detector called IEP-GNN is proposed for massive multiple-input and multiple-output (MIMO) systems. Graph neural network (GNN) and improved moment matching (IMM) are integrated into the expectation propagation (EP) algorithm to improve the accuracy of posterior distribution approximation and leverage the self-correction ability of EP algorithm. Moreover, to acquire the training experiences and optimize initial parameters, hotbooting and Bayesian parameter optimization (BPO) are employed respectively, which can further improve the performance of the proposed IEP-GNN. Simulation results show that our proposed IEP-GNN with BPO outperforms other state-of-the-art EP-based detectors while maintaining an acceptable convergence and computational complexity.
We present approximation algorithms for two problems: Stochastic Boolean Function Evaluation (SBFE) and Stochastic Submodular Set Cover (SSSC). Our results for SBFE problems are obtained by reducing them to SSSC probl...
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ISBN:
(纸本)9781611973389
We present approximation algorithms for two problems: Stochastic Boolean Function Evaluation (SBFE) and Stochastic Submodular Set Cover (SSSC). Our results for SBFE problems are obtained by reducing them to SSSC problems through the construction of appropriate utility functions. We give a new algorithm for the SSSC problem that we call Adaptive Dual Greedy. We use this algorithm to obtain a 3-approximation algorithm solving the SBFE problem for linear threshold formulas. We also get a 3- approximation algorithm for the closely related Stochastic Min-Knapsack problem, and a 2-approximation for a natural special case of that problem. In addition, we prove a new approximation bound for a previous algorithm for the SSSC problem, Adaptive Greedy. We consider an approach to approximating SBFE problems using existing techniques, which we call the Q-value approach. This approach easily yields a new result for evaluation of CDNF formulas, and we apply variants of it to simultaneous evaluation problems and a ranking problem. However, we show that the Q-value approach provably cannot be used to obtain a sublinear approximation factor for the SBFE problem for linear threshold formulas or read-once DNF.
Wireless rechargeable sensor networks (WRSNs) have been extensively used in various event detection and environmental monitoring applications, where it is important to collect environmental data from the sensors. Data...
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ISBN:
(纸本)9781450397964
Wireless rechargeable sensor networks (WRSNs) have been extensively used in various event detection and environmental monitoring applications, where it is important to collect environmental data from the sensors. Data may be collected at the base station (BS) through multi-hop communication. But it may cause sensors located near the BS to run out of their energy quickly. In a WRSN, data may also be collected using mobile vehicles that visit different sensors to collect data. However, in a large scale WRSN, travelling to all the sensors for data collection may cause vehicles to run out of their energy in the middle of their journey. In this paper, we formulate an optimization problem that minimizes the average travel distance of the vehicles while collecting data from maximum number of sensors. The problem is proved to be NP-complete. To avoid visiting all the sensors, our scheme selects a subset of sensors as anchor nodes that first collects data from neighboring sensors through one-hop transfer. Then, the anchor nodes are divided among the vehicles. Finally, a convex-hull based 3-approximation algorithm is proposed that finds the travel plan for each vehicle through the anchor nodes only, where the vehicle starts from the BS, collects data from the anchor nodes, while returning back to the BS at the end of its journey. Simulation results show that our scheme outperforms the existing schemes in terms of the average travel distance by vehicles, while collecting data from a large number of sensors.
Recent advancements in multi-target tracking (MTT) technologies and algorithms have led to improved accuracy and efficiency in tracking multiple objects in dynamic environments. However, as the number of targets incre...
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Recent advancements in multi-target tracking (MTT) technologies and algorithms have led to improved accuracy and efficiency in tracking multiple objects in dynamic environments. However, as the number of targets increases, MTT methods often struggle with computational demands and tracking capacity. This paper presents a novel sectoring approach on the Joint Probabilistic Data Association (JPDA) algorithm to enhance its tracking performance in MTT scenarios. The sectoring method divides the tracking area into distinct sectors and assigns a separate JPDA tracker for each sector, yielding two primary benefits in environments with large numbers of targets. First, it increases the capacity of the JPDA tracker to handle a larger number of targets. Second, it reduces computational complexity when tracking a high number of targets. On the other hand, the approach introduces a trade-off by slightly increasing computational complexity in scenarios with fewer targets. Experimental results were obtained through simulations of 10 different scenarios, each with 37 varying numbers of targets and three different sector configurations, amounting to a total of 1110 simulations. The findings demonstrate that the sectoring approach achieves up to a 95% reduction in computational complexity and increases the number of tracked targets from 24 to 40 in randomly generated scenarios. Results also revealed that the effects of the sectoring approach become more pronounced as the number of sectors increases.
We consider the problem of estimating log-determinants of large, sparse, positive definite matrices. A key focus of our algorithm is to reduce computational cost, and it is based on sparse approximate inverses. The al...
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We consider the problem of estimating log-determinants of large, sparse, positive definite matrices. A key focus of our algorithm is to reduce computational cost, and it is based on sparse approximate inverses. The algorithm can be implemented to be adaptive, and it uses graph spline approximation to improve accuracy. We illustrate our approach on classes of large sparse matrices.
The problem of minmax absolute scheduling-location is investigated on trees with interval edge length. Jobs are located at vertices and must travel to the machine. The goal is to find a machine location and simultaneo...
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The problem of minmax absolute scheduling-location is investigated on trees with interval edge length. Jobs are located at vertices and must travel to the machine. The goal is to find a machine location and simultaneously a schedule to minimize the maximum lateness in the worst-case. We derive a result that could reduce the robust versions to deterministic problems. An efficient algorithm is developed to solve special cases. A 2-approximation algorithm is proposed for the robust problem on the underlying tree.(c) 2022 Elsevier B.V. All rights reserved.
Quantum simulation is the foundation for the design of many algorithms which share subroutines known as quantum simulation kernels. Optimizing the compilation of these kernels is crucial, involving two key components:...
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Quantum simulation is the foundation for the design of many algorithms which share subroutines known as quantum simulation kernels. Optimizing the compilation of these kernels is crucial, involving two key components: 1) circuit synthesis and 2) qubit mapping. However, existing circuit synthesis methods either overlook qubit connectivity constraints (QCCs) or prioritize minimizing gate count over optimizing circuit depth. Similarly, current qubit mapping techniques do not work well with circuit synthesis methods. To address these limitations, we propose PauliForest, which comprises a connectivity-aware circuit synthesis algorithm and a Pauli-oriented qubit mapping algorithm. The synthesis algorithm employs heuristic strategies to generate shallower circuits, while the qubit mapping algorithm seamlessly collaborates with the circuit synthesis process. Compared to the state-of-the-art Paulihedral compiler, our approach significantly reduces both CNOT gate counts (by 13%) and circuit depths (by 25%). Experiments on a noisy simulator and a real superconducting quantum computer show that our algorithm can improve the fidelity of quantum circuit execution compared to Paulihedral.
We formalize and illustrate the general concept of algorithmic anti-differentiation: given an algorithmic procedure, e.g., an approximation algorithm for which worst-case approximation guarantees are available or a he...
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