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arXiv 2023年

作者： Lin, Shijie Zhang, Yingqiang Huang, Dongyue Zhou, Bin Luo, Xiaowei Pan, Jia The Department of Computer Science The University of Hong Kong Hong Kong The Department of Mechanical and Automation Engineering The Chinese University of Hong Kong Hong Kong The School of Computer Science and Engineering Beihang University Beijing China The Department of Architecture and Civil Engineering City University of Hong Kong Hong Kong Peng Cheng Laboratory Guangdong Shenzhen China

Motion deblurring is a critical ill-posed problem that is important in many vision-based robotics applications. The recently proposed event-based double integral (EDI) provides a theoretical framework for solving the deblurring problem with the event camera and generating clear images at high frame-rate. However, the original EDI is mainly designed for offline computation and does not support real-time requirement in many robotics applications. In this paper, we propose the fast EDI, an efficient implementation of EDI that can achieve real-time online computation on single-core CPU devices, which is common for physical robotic platforms used in practice. In experiments, our method can handle event rates at as high as 13 million event per second in a wide variety of challenging lighting conditions. We demonstrate the benefit on multiple downstream real-time applications, including localization, visual tag detection, and feature matching. © 2023, CC0.

关键词： Robotics

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Simulating and deploying analog arithmetic circuits on fpaas

Simulating and deploying analog arithmetic circuits on fpaas

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2020 Summer computer Simulation Conference, SCSC 2020, Held at the 2020 Summer Simulation Multi-Conference, SummerSim 2020

作者： Moreno, Daniel García Del Barrio, Alberto A. Juan, Guillermo Botella Department of Computer Architecture Automation Universidad Complutense de Madrid Plaza Las Ciencias 1 Madrid Spain

ISBN: (纸本)9781713819462

Analog computing is a field of study which is recovering relevance. FPAAs are the equivalent to FPGAs but in the analog domain. The FPAAs of Anadigm are well suitable for analog designs prototyping. Anadigm provides a time domain functional simulator to check the analog designs before downloading them into the FPAAs. In this paper, a weighted sum is implemented through 3 FPAAs and simulated to test performance of both the simulator and behavior in real conditions with the results that should theoretically be obtained. Results show that most of the times the difference ranges from 0.01V to 0.02V. ©2020 Society for Modeling and Simulation (SCS) International

关键词： Timing circuits

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Sustainable Edge Computing: Challenges and Future Directions

arXiv

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arXiv 2023年

作者： Arroba, Patricia Buyya, Rajkumar Cárdenas, Román Risco-Martín, José L. Moya, José M. CCS–Center for Computational Simulation ETSI Telecomunicación Universidad Politécnica de Madrid Spain Lab School of Computing and Information Systems The University of Melbourne Australia Department of Computer Architecture and Automation Universidad Complutense de Madrid Spain

An increasing amount of data is being injected into the network from IoT (Internet of Things) applications. Many of these applications, developed to improve society's quality of life, are latency-critical and inject large amounts of data into the network. These requirements of IoT applications trigger the emergence of Edge computing paradigm. Currently, data centers are responsible for a global energy use between 2% and 3%. However, this trend is difficult to maintain, as bringing computing infrastructures closer to the edge of the network comes with its own set of challenges for energy efficiency. In this paper, we propose our approach for the sustainability of future computing infrastructures to provide (i) an energy-efficient and economically viable deployment, (ii) a fault-tolerant automated operation, and (iii) a collaborative resource management to improve resource efficiency. We identify the main limitations of applying Cloud-based approaches close to the data sources and present the research challenges to Edge sustainability arising from these constraints. We propose two-phase immersion cooling, formal modeling, machine learning, and energy-centric federated management as Edge-enabling technologies. We present our early results towards the sustainability of an Edge infrastructure to demonstrate the benefits of our approach for future computing environments and deployments. © 2023, CC BY.

关键词： Internet of things

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Secure and Efficient Transmission of Spatial Data using Colored Quick Response (QR) Codes: A Case Study for the EyE Project

Secure and Efficient Transmission of Spatial Data using Colo...

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Frontiers in Optics + Laser Science 2023, FiO, LS 203: Part of Frontiers in Optics + Laser Science 2023

作者： Cerrato, Sara Ignacio Pacios, David Rodríguez, José Miguel Ezquerro Vázquez-Poletti, José Luis Schetakis, Nikolaos Stavrakakis, Konstantinos Di Iorio, Alessio Mariño, María Estefanía Avilés Optics Department Faculty of Optics and Optometry Universidad Complutense de Madrid Calle Arcos de Jalón 118 Madrid28037 Spain Department of Computer Architecture and Automation Faculty of Informatics Universidad Complutense de Madrid Calle del Prof. José García Santesmases 9 Madrid28040 Spain Quantum Innovation Pc Chania73100 Greece Alma Sistemi Srl Guidonia Rome00012 Italy English Department Universidad de Diseño Innovación y Tecnología Avenida de Alfonso XIII 97 Madrid28016 Spain

We introduce a novel color QR code system for advanced encryption, leveraging spatial data, optimized on AWS. Outperforms conventional systems in speed and cost. Future applications in secure healthcare data storage a... 详细信息

ISBN: (纸本)9781957171296

关键词： Encryption Imaging Laser systems Multiplexing Quantum computation Radar

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Optimal Design of Heliostat Field Using Random Search Algorithm

Optimal Design of Heliostat Field Using Random Search Algori...

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IEEE International Conference on Power, Intelligent Computing and Systems (ICPICS)

作者： Chenglin Mou Kaiqi Wu Pengcheng Du Kaibo Yang Department of Engineering Mechanics School of Civil Engineering and Architecture Henan University of Science and Technology Luoyang China Department of Computer Science and Technology School of Information Engineering Henan University of Science and Technology Luoyang China Department of Automation School of Information Engineering Henan University of Science and Technology Luoyang China Department of Civil Engineering School of International Education Henan University of Science and Technology Luoyang China

ISBN: (数字)9798350374315

ISBN: (纸本)9798350374322

Tower solar thermal power generation is a new type of low-carbon and environmentally friendly clean energy technology. In this paper, a single-objective optimization model is established with the maximum annual average thermal output per unit mirror area of the heliostat field as the objective function. By optimizing the heliostat width, heliostat height and heliostat coordinate, the annual average output thermal power can be maximized while meeting the rated power. The heliostat field is distributed in a circular shape. As the seasons change, the light intensity received by the heliostat field is uneven, so the optical efficiency of the heliostats is also different. We simplify the heliostat field into S area (area with higher optical efficiency) and W area (area with lower optical efficiency) based on the optical efficiency distribution of heliostats. At different locations, According to the heliostat width, heliostat height and heliostat coordinate generated by random functions, substituting these parameters into the efficiency model in this paper, and the random search algorithm is used to traverse the maximum annual output thermal power and the corresponding heliostat parameters. In the shadow occlusion loss model, we have grid to set up the heliostat and use the coordinate conversion to solve the shadow occlusion loss efficiency.

关键词： Integrated optics Green energy Shape Optimization models Computational modeling Poles and towers Linear programming Mirrors Power generation

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The New Concept of Guaranteeing Confidence in the E-Voting System

The New Concept of Guaranteeing Confidence in the E-Voting S...

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2020 IEEE International Conference on Problems of Infocommunications Science and Technology, PIC S and T 2020

作者： Khlaponin, Yurii Vyshniakov, Volodymyr Prygara, Mykhailo Poltorak, Vadym Kyiv National University of Construction and Architecture Cybersecurity and Computer Engineering Department Kyiv Ukraine National University Machine Industry Technology Department Uzhhorod Uzhhorod Ukraine National Technical University of Ukraine 'Igor Sikorsky Kyiv Polytechnic Institute' Department of Technical Systems Automation and Control Kyiv Ukraine

ISBN: (纸本)9781728191775

There is no doubt about the urgency of ensuring trust in e-voting systems since elections without trust cannot be acceptable in a democratic society. To solve this problem, it was proposed to use blockchain technology, however, in voting systems this leads to significant delays in the execution of transactions, and the software solution is accessible only to a narrow circle of specialists, which clearly does not help to show confidence on the part of voters. This paper proposes a different approach, which is based on the widely available verification of all means and processes that may cause distrust in the accuracy of the vote count or in ensuring their confidentiality. We offer a solution to the problem of transparency of all hardware and software that cause distrust. Voting systems that use this approach are implemented in three leading Ukrainian universities for student elections to self-government bodies. The conceptual model of the e-voting system for state elections on the example of Ukraine is presented. Links to Internet resources are provided where you can not only get acquainted with the principles of building the system, but also conduct an experimental vote in Ukrainian, English or Russian. You can also copy and test e-voting server software on your computers. © 2020 IEEE.

关键词： Transparency

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A methodology to automatically optimize dynamic memory managers applying grammatical evolution

arXiv

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arXiv 2024年

作者： Risco-Martín, José L. Colmenar, J. Manuel Hidalgo, J. Ignacio Lanchares, Juan Díaz, Josefa Department of Computer Architecture and Automation Universidad Complutense de Madrid Madrid28040 Spain C. E. S. Felipe II Universidad Complutense de Madrid Aranjuez28300 Spain C.U. Mérida Universidad de Extremadura Mérida06800 Spain

Modern consumer devices must execute multimedia applications that exhibit high resource utilization. In order to efficiently execute these applications, the dynamic memory subsystem needs to be optimized. This complex task can be tackled in two complementary ways: optimizing the application source code or designing custom dynamic memory management mechanisms. Currently, the first approach has been well established, and several automatic methodologies have been proposed. Regarding the second approach, software engineers often write custom dynamic memory managers from scratch, which is a difficult and error-prone work. This paper presents a novel way to automatically generate custom dynamic memory managers optimizing both performance and memory usage of the target application. The design space is pruned using grammatical evolution converging to the best dynamic memory manager implementation for the target application. Our methodology achieves important improvements (62.55% and 30.62% better on average in performance and memory usage, respectively) when its results are compared to five different general-purpose dynamic memory managers. © 2024, CC BY-SA.

关键词： Genetic programming

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Backtesting quantum computing algorithms for portfolio optimization

TechRxiv

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TechRxiv 2023年

作者： de las Heras, Ginés Carrascal Manso, Paula Hernamperez Botella, Guillermo del Barrio, Alberto Antonio IBM Quantum IBM Consulting España Madrid28830 Spain Department of Informatic Systems and Computation Faculty of Informatics Complutense University of Madrid Madrid28040 Spain CARTIF Valladolid47151 Spain Department of Computer Architecture and Automation Faculty of Informatics Complutense University of Madrid Madrid28040 Spain

The development of quantum computers represents a breakthrough in the evolution of computing. Their graceful processing capacity will help to solve some problems impossible until now because the algorithms that calculate their solution require too much amount of memory or processing time. In portfolio theory, the investment portfolio optimization problem is one of those problems whose complexity grows exponentially with the number of assets. In this work we analyze the Variational Quantum Eigensolver algorithm, applied to solve the portfolio optimization problem, running on simulators and real quantum computers from IBM. We compare the results with three other classical algorithms for the same problem, running one equivalent condition. By backtesting classical and quantum computing algorithms, we can get a sense of how these algorithms might perform in the real world. This work explores the backtesting of quantum and classical computing algorithms for portfolio optimization and compares the results. The benefits and drawbacks of backtesting are discussed, as well as some of the challenges involved in using real quantum computers of more than 100 qubits. Results show quantum algorithms can be competitive with classical ones, with the advantage of being able to handle a large number of assets in a reasonable time on a future larger quantum computer. © 2023, CC BY.

关键词： Optimization

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Fast Event-based Double Integral for Real-time Robotics

Fast Event-based Double Integral for Real-time Robotics

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IEEE International Conference on Robotics and automation (ICRA)

作者： Shijie Lin Yingqiang Zhang Dongyue Huang Bin Zhou Xiaowei Luo Jia Pan Department of Computer Science The University of Hong Kong Hong Kong SAR China Peng Cheng Laboratory Shenzhen Guangdong China Department of Mechanical and Automation Engineering The Chinese University of Hong Kong Hong Kong SAR China School of Computer Science and Engineering Beihang University Beijing China Department of Architecture and Civil En-gineering City University of Hong Kong Hong Kong SAR China

Motion deblurring is a critical ill-posed problem that is important in many vision-based robotics applications. The recently proposed event-based double integral (EDI) provides a theoretical framework for solving the deblurring prob-lem with the event camera and generating clear images at high frame-rate. However, the original EDI is mainly designed for offline computation and does not support real-time requirement in many robotics applications. In this paper, we propose the fast EDI, an efficient implementation of EDI that can achieve real-time online computation on single-core CPU devices, which is common for physical robotic platforms used in practice. In experiments, our method can handle event rates at as high as 13 million event per second in a wide variety of challenging lighting conditions. We demonstrate the benefit on multiple downstream real-time applications, including localization, vi-sual tag detection, and feature matching.

关键词：

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The Importance of Being Earnest: Multiple Heterogeneous Container Loading with a Simple Genetic Algorithm 28th

The Importance of Being Earnest: Multiple Heterogeneous Con...

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28th European Conference on Applications of Evolutionary Computation, EvoApplications 2025, held as part of EvoStar 2025

作者： Rusin, Francesco Fiala, Jan Sanker, Julian Bhattarai, Suyesh Ekárt, Anikó Department of Engineering and Architecture University of Trieste Trieste Italy Institute of Automation and Computer Science Brno University of Technology Brno Czech Republic Yale College Yale University New Haven United States Mechatherm International Limited Cradley Heath United Kingdom Aston Centre for Artificial Intelligence Research and Application Aston University Birmingham United Kingdom

ISBN: (纸本)9783031900617

In this study we address the complex practical problem of multiple heterogeneous container loading with a simple genetic algorithm. We demonstrate that with a well-chosen representation including a heuristic and a suitable fitness function the other aspects of the genetic algorithm do not need extensive work for good results. Following systematic study of our method on synthetically generated data, we visually showcase the solution for a company-based problem instance. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Genetic algorithms

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