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Evaluating Standard Search Enhancements Performance in Zen Puzzle Garden

Evaluating Standard Search Enhancements Performance in Zen P...

2023 IEEE CHILEAN Conference on Electrical, Electronics engineering, Information and Communication Technologies, ChileCon 2023

作者： Schaa, Hans Del Solar-Zavala, Jose A. Barriga, Nicolas A. Doctoral Program in Engineering Systems Universidad de Talca Curico Chile Universidad de Talca Faculty of Engineering Talca Chile

ISBN: (纸本)9798350369533

Sokoban-type puzzles and their variants involve complex planning and decision-making challenges in wide and deep search spaces. Such scenarios are interesting for testing path-planning algorithms. This document uses A ∗ and IDA ∗ (Iterative Deepening A *) algorithms to solve Zen Puzzle Garden game boards;a Sokoban-type puzzle where you need rake the sandy area completely. The algorithms are evaluated in terms of speed and node expansion in moderately complex boards. Additionally, we implement three improvements: transposition tables, move ordering, and deadlock tables. The results show that IDA ∗ with the three proposed improvements is on average faster than A *. Although its strength is its low memory usage, it can be seen that it is very competitive versus A ∗ in terms of time usage. Transposition tables and deadlocks tables reduce by 500 times the number of nodes expanded by the IDA ∗ without improvements. On the other hand, the ordering of nodes is not very effective for some boards, which causes a worse performance of the IDA ∗ algorithm, giving rise to greater exploration in boards that do not lead to the solution. Studying these algorithms can be beneficial in the field of path-finding for Sokoban-type game domains or solver-based procedural content generators. © 2023 IEEE.

关键词： Decision making

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Application of Linear Electromagnetic Actuators in Vehicular Suspensions 12

Application of Linear Electromagnetic Actuators in Vehicular...

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12th SAE BRASIL Colloquium on Suspensions and Road Implements and engineering Exhibition, BRASILCOLL 2023

作者： Eckert, Paulo Roberto Boff, Ben Hur Bandeira Follmann, Lucas Da Silva Oliveira, Eduardo Filho, Aly Ferreira Flores Flores, Jeferson Vieira Perondi, Eduardo Andre Lenz, Augusto Schmidt Poli, Mariana Damm Marcolin, Vinicius Campagnaro Struck, Rodrigo Graduate Program in Electrical Engineering Federal Universi Russia Graduate Program in Mechanical Engineering Federal Universi Russia Suspensys Automotive Systems RS Caxias do Sul Brazil

This study comprehensively describes the application of linear electromagnetic actuators in automotive suspension systems, focusing on the electromagnetic force necessary in suspension systems operating in passive, semi-active, and active modes and their capability for energy regeneration. The use of electromagnetic actuators as an alternative to traditional shock absorbers makes easy the energy harvesting that is typically lost during vertical vehicle displacement. An initial sizing technique for dimensioning electromagnetic actuators is applied to estimate the requirements for heavy vehicles. Experimental tests are conducted to validate the proposed method and assess the performance of the electromagnetic actuator in the suspension system for passive, semi-active, and active operations. A suitable extrapolation of the validated data is performed to determine the feasibility of the application of the proposed solution for heavy vehicles and identify potential applications and markets based on the road conditions of the ISO 8608 standard. This study offers a comprehensive approach to determining the actuator force for the suspension system and/or studying its potential for energy regeneration. As a result, it becomes possible to analyze the viability of the actuator replacement and provides important insights for further research and development. © 2023 SAE International. All rights reserved.

关键词： Shock absorbers

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L2 Input-to-State Stability and Stabilization of Coupled Linear ODE-Hyperbolic PDE systems∗ 63

L2 Input-to-State Stability and Stabilization of Coupled Lin...

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63rd IEEE Conference on Decision and Control, CDC 2024

作者： Coutinho, Daniel Andrade, Gustavo Artur De Carvalho, Franthiescolly Vieira De Federal University of Santa Catarina Department of Automation and Systems Engineering Florianópolis88040-370 Brazil Federal University of Santa Catarina Post-graduate Program in Automation and Systems Engineering Florianópolis88040-370 Brazil

ISBN: (纸本)9798350316339

This paper addresses the problem of input-to-state stability (ISS) and stabilization of linear ordinary differential equations (ODEs) coupled with a system of homogeneous linear hyperbolic partial differential equations (PDEs) through the boundaries. First, a Lyapunov result characterizing the ISS property for finite-dimensional systems is extended to deal with coupled ODE and PDE systems. The proposed ISS condition is then applied to derive stability and stabilization conditions in terms of linear matrix inequality constraints assuming magnitude bounded disturbances at the boundaries. Two convex optimization problems are also proposed in order to obtain either an optimized reachable set estimate or a boundary controller that minimizes the disturbance effects on the L2 × R-norm of the system states. Numerical examples illustrate the potential of the proposed approach. © 2024 IEEE.

关键词： Convex optimization

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Using Entropy for Modeling Difficulty in the Asteroid Escape Sliding Puzzle

Using Entropy for Modeling Difficulty in the Asteroid Escape...

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2023 IEEE CHILEAN Conference on Electrical, Electronics engineering, Information and Communication Technologies, ChileCon 2023

作者： Del Solar-Zavala, Jose A. Schaa, Hans Barriga, Nicolas A. Doctoral Program in Engineering Systems Universidad de Talca Curicó Chile Universidad de Talca Faculty of Engineering Talca Chile

ISBN: (纸本)9798350369533

Developing a standarized metric for difficulty that can be applied to a large number of puzzles is not trivial. This does not come as a surprise because of the subjective factors involved in defining difficulty. However, studies that address the design and application of metrics that can be applied to multiple games are still important, because they can still be used to increase the quality of content generated by automated agents. We take a look at applying information entropy concepts in the game Asteroid Escape and compare the results with other metrics to assess difficulty used in games of similar characteristics. This approach is largely based on future work proposal from a previous study done on The Witness puzzles that yielded positive results on using an automatic method to assess the difficulty of user rated puzzles. This study also includes a modification of BFS and A∗ capable of finding every shortest solution. From the implementation, it is possible to look at contradicting results with the literature, where basic metrics had a better result correlating with an official definition of difficulty from the game designers. The impact expected from this study is to propose an update to the the corpus of puzzle games where the uncertainty metric for difficulty has been applied. As having an accurate assessment of difficulty can open the doors to other studies, such as improving the quality of the output from procedural content generation methods in games or propose an automated method of difficulty adjustment based on this metric. © 2023 IEEE.

关键词： Asteroids

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Modal analysis under jittering and kernel clock distribution: single-output identification

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Proceedings of the Institution of Civil Engineers: Smart Infrastructure and Construction 2023年第4期177卷 224-235页

作者： Ramadan, Wasim Ozer, Ekin Sustainable Environment and Energy Systems Program Middle East Technical University Northern Cyprus Campus Turkey School of Civil Engineering University College Dublin Dublin Ireland

Smartphones have attracted attention in the structural health monitoring community due to their embedded multisensory platforms suitable for crowdsourcing innovation. Despite their advantages, smartphone sensors are originally designed for user utility rather than technical engineering applications (e.g. vibration analysis and modal identification). Sampling jitter is among those problems adversely influencing smartphone performance as a scientific device that can be used for characterising civil infrastructure dynamic characteristics. With inconsistencies in the sampling period due to jitter effects, the identified modal frequencies of a structure can deviate from the actual value, which is artificially introduced by smartphone clock errors. In this study, the authors formulate the statistical characteristics of the smartphone sampling period through kernel distribution and apply a digital reconstruction remedy to the sampling jitter problem. Through introductory simulations of a sine wave and physical implementations through shaking table tests equipped with smartphones, the efficiency of kernel distribution diagnosis and the signal-reconstruction remedy is presented. Following the simulation and laboratory applications, the proposed techniques are applied to vibration monitoring of a steel pedestrian bridge in terms of the auto power spectral density and short-time Fourier transform of single-output signals. The results show successful rehabilitation of accelerometer data from smartphones, removing jitter-induced errors to a significant extent and accordingly improving the identification accuracy currently in a single-output setting. © 2023 Emerald Publishing Limited: All rights reserved.

关键词： Vibration analysis

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Comparative analysis of bioinspired algorithms for tuning a flatness-based controller: A ball and beam case study

Comparative analysis of bioinspired algorithms for tuning a ...

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2024 IEEE Latin American Conference on Computational Intelligence, LA-CCI 2024

作者： Pastrana, M.A. Filho, Jose Oniram De A. Limaverde Oliveira, Luiz Henrique Bautista, Jaider Fortaleza, Eugenio Munoz, Daniel M. Department of Mechanical Engineering Brasília Brazil University of Brasília Department of Electrical Engineering Brasília Brazil University of the Amazonia Faculty of Engineering Systems Undergraduate Program Florencia Colombia

ISBN: (纸本)9798350374575

This paper provides a comprehensive comparative analysis of the performance of four bioinspired algorithms (Differential Evolution, Grasshopper Optimization Algorithm, Moth-flame Optimization, and Particle Swarm Optimization) in designing a flatness-based controller for a ball and beam system simulated in MATLAB/Simulink environment. The assessment involves the tuning of feedback gains utilizing four distinct fitness functions: Integral Square Error, Integral Absolute Error, Integral Time Absolute Error, and an ad-hoc cost function. Hypothesis tests are employed to choose the optimal controllers from each combination for every bioinspired algorithm and a fitness function. Subsequently, a control performance analysis of these controllers for the ball and beam system is conducted, focusing on critical parameters such as overshoot, settling time, and steady-state error. This analysis demonstrates that all the controllers achieve a zero steady-state error. Noteworthy is the flatness-based controller tuned with the bioinspired Grasshopper Optimization Algorithm and utilizing the Integral Time Absolute Error fitness function, which stands out for achieving the fastest response with the lowest overshoot. This particular controller emerges as the most recommended choice for the specified application. © 2024 IEEE.

关键词： Particle swarm optimization (PSO)

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Identification of spalling in concrete structures by a hammering test using autoencoder 8th

Identification of spalling in concrete structures by a hamme...

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8th International Symposium on Life-Cycle Civil engineering, IALCCE 2023

作者： Emoto, Hisao Fukui, Nobuki Iitaka, Yuto Kanazawa, Shin-Ichi Social Systems and Civil Engineering Tottori University Tottori-City Japan Industrial Technology and Systems Engineering Fukushima College Iwaki-City Japan Civil Engineering Program Faculty of Engineering Niigata University Niigata-City Japan

ISBN: (纸本)9781003323020

Visual inspection of bridges is important to maintain the sustainability of civil infrastructure. A hammering test is one of the non-destructive and verified methods used for this purpose, by which an expert inspector identifies spalling inside a concrete structure. The reliability of this method depends on the technique of the inspector. However, Japan society faces the problem of a scarcity of labor across all fields. Because of this, there are few training opportunities for new inspectors to learn the technique. This study aims to identify spalling concrete by using an autoencoder, instead of professional inspectors. First, a spalled concrete specimen was used to record the hammering sounds. The experimental method and a comparison of frequency spectra at each level of damage were described. Next, the autoencoder was applied to identify spalling concrete, and a comparison of the identification precision at each damage level was conducted. The results of the analysis show that spalling concrete can be identified by autoencoder to a concrete thickness of less than 30 mm. © 2023 The Author(s).

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Reachability-Based Delayed Decision Guidance for Conventional Interceptors 63

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63rd Israel Annual Conference on Aerospace Sciences, IACAS 2024

作者： Shalumov, Vitaly Merkulov, Gleb Shima, Tal Technion – Israel Institute of Technology Haifa3200003 Israel The Technion Program for Autonomous Systems and Robotics Israel Faculty of Aerospace Engineering Israel

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An Optimization Model of a Retailer and a Manufacturer in a Green Supply Chain 3rd

An Optimization Model of a Retailer and a Manufacturer in a ...

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3rd International Conference on Smart Manufacturing, Industrial and Logistics engineering, SMILE 2023 and the 7th Asian Conference of Management Science and Applications, ACMSA 2023

作者： Sakurai, Wataru Nakade, Koichi Nagoya Institute of Technology Systems Management and Engineering Program Gokiso-cho Showa-ku Nagoya-shi Aichi466-8555 Japan

ISBN: (纸本)9789819701933

In recent years, the development of a green supply chain model that takes sustainability into consideration has become an urgent issue in corporate management and policy operation. For example, in the fashion industry, the proper circulation of not only used items purchased by consumers, but also unsold items generated in retail stores is one of the most important issues. In this study, we examine a supply chain model for the appropriate circulation of unsold new products from retail outlets. Specifically, we considered a supply chain model in which a retailer’s inventory is divided into two states under stochastic demand fluctuations: new and old items, and the unsold old items are collected and reproduced by a manufacturer. By formulating this model as a Markov decision process, the optimal decisions regarding the retailer’s ordering policy and the retail price and the manufacturer’s wholesale price are obtained. Optimal investment and appropriate institutional design to reduce CO2 emissions generated in a supply chain are also considered. Specifically, we examine the decision of green investment in manufacturing technology to reduce CO2 emissions when a manufacturer produce items. And we examine the design of a carbon tax system to control CO2 emissions. Sensitivity analysis on the carbon tax system shows that raising the carbon tax rate increases the optimal retail price, the optimal wholesale price, and the optimal green investment. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Investments

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Compact Complementary Split Ring Resonator Based Sensor for Non-Invasive Glucose monitoring

Compact Complementary Split Ring Resonator Based Sensor for ...

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2024 International Telecommunications Conference, ITC-Egypt 2024

作者： Zahran, Adnan Aly, Youssif Ayman Eldamak, Angie R. Elsheakh, Dalia N. Ain Shams University Electronics and Communication Systems Engineering Program Faculty of engineering Cairo Egypt Ain Shams University Faculty of engineering Electronics and Communication Systems Engineering Dept. Cairo Egypt Badr University in Cairo Faculty of Engineering and Technology Electrical Dept. Badr City Cairo11829 Egypt

ISBN: (纸本)9798350351408

This paper presents a novel approach for noninvasive glucose monitoring using a Compact Complementary Split Ring Resonator (CCSRR) based sensor. The sensor design is initially simulated using High-Frequency Structure Simulator (HFSS) software, and then experimental validation is done. We carried out simulations with and without a finger phantom model to closely resemble conditions in real situations. The sensor exhibits high sensitivity and accuracy in detecting glucose concentrations within blood samples. Vector Network Analyzer was used along with the sensor to validate the simulation results. The results demonstrate close agreement between simulation and experimental data, affirming the effectiveness of the proposed sensor design for non-invasive glucose monitoring. © 2024 IEEE.

关键词： Glucose sensors

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