Energy
Enhancing robustness of data-driven SHM models: adversarial training with circle loss
Yang, Xiangli, Deng, Xijie, Zhang, Hanwei, Zou, Yang, Yang, Jianxi
Structural health monitoring (SHM) is critical to safeguarding the safety and reliability of aerospace, civil, and mechanical infrastructure. Machine learning-based data-driven approaches have gained popularity in SHM due to advancements in sensors and computational power. However, machine learning models used in SHM are vulnerable to adversarial examples -- even small changes in input can lead to different model outputs. This paper aims to address this problem by discussing adversarial defenses in SHM. In this paper, we propose an adversarial training method for defense, which uses circle loss to optimize the distance between features in training to keep examples away from the decision boundary. Through this simple yet effective constraint, our method demonstrates substantial improvements in model robustness, surpassing existing defense mechanisms.
Robustness Analysis of AI Models in Critical Energy Systems
Dogoulis, Pantelis, Jimenez, Matthieu, Ghamizi, Salah, Cordy, Maxime, Traon, Yves Le
The AC power flow problem can be characterized by a system of nonlinear equations depending on the network This paper analyzes the robustness of state-of-theart configuration at each time point. The network configuration AI-based models for power grid operations encompasses the loads, generations, and topology of the under the N 1 security criterion. While these network, as well as, some intrinsic characteristics of the models perform well in regular grid settings, our lines (i.e.
Computing Within Limits: An Empirical Study of Energy Consumption in ML Training and Inference
Mavromatis, Ioannis, Katsaros, Kostas, Khan, Aftab
Machine learning (ML) has seen tremendous advancements, but its environmental footprint remains a concern. Acknowledging the growing environmental impact of ML this paper investigates Green ML, examining various model architectures and hyperparameters in both training and inference phases to identify energy-efficient practices. Our study leverages software-based power measurements for ease of replication across diverse configurations, models and datasets. In this paper, we examine multiple models and hardware configurations to identify correlations across the various measurements and metrics and key contributors to energy reduction. Our analysis offers practical guidelines for constructing sustainable ML operations, emphasising energy consumption and carbon footprint reductions while maintaining performance. As identified, short-lived profiling can quantify the long-term expected energy consumption. Moreover, model parameters can also be used to accurately estimate the expected total energy without the need for extensive experimentation.
Exposure Conscious Path Planning for Equal Exposure Corridors
Hamzezadeh, Eugene T., Rogers, John G., Dantam, Neil T., Petruska, Andrew J.
Personal use of this material is permitted. Abstract-- While maximizing line-of-sight coverage of specific regions or agents in the environment is a well-explored path planning objective, the converse problem of minimizing exposure to the entire environment during navigation is especially interesting in the context of minimizing detection risk. This work demonstrates that minimizing line-of-sight exposure to the environment is non-Markovian, which cannot be efficiently solved optimally with traditional path planning. The optimality gap of the graph-search algorithm A* and the trade-offs Figure 1: When delivering a package the robot should take the solid in optimality vs. computation time of several approximating black line route over the dashed red one, so as to minimize the heuristics is explored. Finally, the concept of equal-exposure likelihood of being seen by a malicious agent.
Resource Allocation with Karma Mechanisms
Riehl, Kevin, Kouvelas, Anastasios, Makridis, Michail
Monetary markets serve as established resource allocation mechanisms, typically achieving efficient solutions with limited information. However, they are susceptible to market failures, particularly under the presence of public goods, externalities, or inequality of economic power. Moreover, in many resource allocating contexts, money faces social, ethical, and legal constraints. Consequently, research increasingly explores artificial currencies and non-monetary markets, with Karma emerging as a notable concept. Karma, a non-tradeable, resource-inherent currency for prosumer resources, operates on the principles of contribution and consumption of specific resources. It embodies fairness, near incentive compatibility, Pareto-efficiency, robustness to population heterogeneity, and can incentivize a reduction in resource scarcity. The literature on Karma is scattered across disciplines, varies in scope, and lacks of conceptual clarity and coherence. Thus, this study undertakes a comprehensive review of the Karma mechanism, systematically comparing its resource allocation applications and elucidating overlooked mechanism design elements. Through a systematic mapping study, this review situates Karma within its literature context, offers a structured design parameter framework, and develops a road-map for future research directions.
Image anomaly detection and prediction scheme based on SSA optimized ResNet50-BiGRU model
Wan, Qianhui, Zhang, Zecheng, Jiang, Liheng, Wang, Zhaoqi, Zhou, Yan
Image anomaly detection is a popular research direction, with many methods emerging in recent years due to rapid advancements in computing. The use of artificial intelligence for image anomaly detection has been widely studied. By analyzing images of athlete posture and movement, it is possible to predict injury status and suggest necessary adjustments. Most existing methods rely on convolutional networks to extract information from irrelevant pixel data, limiting model accuracy. This paper introduces a network combining Residual Network (ResNet) and Bidirectional Gated Recurrent Unit (BiGRU), which can predict potential injury types and provide early warnings by analyzing changes in muscle and bone poses from video images. To address the high complexity of this network, the Sparrow search algorithm was used for optimization. Experiments conducted on four datasets demonstrated that our model has the smallest error in image anomaly detection compared to other models, showing strong adaptability. This provides a new approach for anomaly detection and predictive analysis in images, contributing to the sustainable development of human health and performance.
Online Learning of Weakly Coupled MDP Policies for Load Balancing and Auto Scaling
Eshwar, S. R., Felipe, Lucas Lopes, Reiffers-Masson, Alexandre, Menasché, Daniel Sadoc, Thoppe, Gugan
Load balancing and auto scaling are at the core of scalable, contemporary systems, addressing dynamic resource allocation and service rate adjustments in response to workload changes. This paper introduces a novel model and algorithms for tuning load balancers coupled with auto scalers, considering bursty traffic arriving at finite queues. We begin by presenting the problem as a weakly coupled Markov Decision Processes (MDP), solvable via a linear program (LP). However, as the number of control variables of such LP grows combinatorially, we introduce a more tractable relaxed LP formulation, and extend it to tackle the problem of online parameter learning and policy optimization using a two-timescale algorithm based on the LP Lagrangian.
$\nabla^2$DFT: A Universal Quantum Chemistry Dataset of Drug-Like Molecules and a Benchmark for Neural Network Potentials
Khrabrov, Kuzma, Ber, Anton, Tsypin, Artem, Ushenin, Konstantin, Rumiantsev, Egor, Telepov, Alexander, Protasov, Dmitry, Shenbin, Ilya, Alekseev, Anton, Shirokikh, Mikhail, Nikolenko, Sergey, Tutubalina, Elena, Kadurin, Artur
Methods of computational quantum chemistry provide accurate approximations of molecular properties crucial for computer-aided drug discovery and other areas of chemical science. However, high computational complexity limits the scalability of their applications. Neural network potentials (NNPs) are a promising alternative to quantum chemistry methods, but they require large and diverse datasets for training. This work presents a new dataset and benchmark called $\nabla^2$DFT that is based on the nablaDFT. It contains twice as much molecular structures, three times more conformations, new data types and tasks, and state-of-the-art models. The dataset includes energies, forces, 17 molecular properties, Hamiltonian and overlap matrices, and a wavefunction object. All calculations were performed at the DFT level ($\omega$B97X-D/def2-SVP) for each conformation. Moreover, $\nabla^2$DFT is the first dataset that contains relaxation trajectories for a substantial number of drug-like molecules. We also introduce a novel benchmark for evaluating NNPs in molecular property prediction, Hamiltonian prediction, and conformational optimization tasks. Finally, we propose an extendable framework for training NNPs and implement 10 models within it.
Would you like to see the menu... of the future? From cricket salad to 'water plant' spag bol, AI images reveal what meals could look like in 30 years as we're forced to eat 'sustainability' to help save the planet
Ultra-realistic images created by AI show what your dinner could look like in 30 years' time as we're forced to eat'sustainability'. Experts have used AI tool Midjourney to bring to life the menu of 2054, which features bizarre dishes such as cricket salad and lab-grown steaks. There's even green spaghetti and'meat' balls made out of an aquatic plant, which look straight from the kitchen of another galaxy. These unusual creations could replace family favourite dishes such as the traditional Sunday roast or fish and chips, the scientists believe. They have lower carbon footprints than such classics, which means they could help in the battle against climate change – but would you eat them?
Winning Through Simplicity: Autonomous Car Design for Formula Student
Friedrich, Tobias, Müller, Marco, Bauske, Adrian, Härtl, Simon, Herrmann, Johannes, Förster, David, Tietze, Tobias, Sartor, Sebastian
This paper presents the design of an autonomous race car that is self-designed, self-developed, and self-built by the Elefant Racing team at the University of Bayreuth. The system is created to compete in the Formula Student Driverless competition. Its primary focus is on the Acceleration track, a straight 75-meter-long course, and the Skidpad track, which comprises two circles forming an eight. Additionally, it is experimentally capable of competing in the Autocross and Trackdrive events, which feature tracks with previously unknown straights and curves. The paper details the hardware, software and sensor setup employed during the 2020/2021 season. Despite being developed by a small team with limited computer science expertise, the design won the Formula Student East Engineering Design award. Emphasizing simplicity and efficiency, the team employed streamlined techniques to achieve their success.