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arXiv 2024年

作者： Bilò, Davide Chechik, Shiri Choudhary, Keerti Cohen, Sarel Friedrich, Tobias Schirneck, Martin Department of Information Engineering Computer Science and Mathematics University of L'Aquila Italy Department of Computer Science Tel Aviv University Department of Computer Science and Engineering Indian Institute of Technology Delhi India School of Computer Science The Academic College of Tel Aviv-Yaffo Hasso Plattner Institute University of Potsdam Germany Faculty of Computer Science University of Vienna Austria

A distance oracle (DO) for a graph G is a data structure that, when queried with vertices s, t, returns an estimate (Equation presented)(s, t) of their distance in G. The oracle has stretch (α, β) if the estimate satisfies (Equation presented). An f-edge fault-tolerant distance sensitivity oracle (f-DSO) additionally receives a set F of up to f edges and estimates the distance in G−F. Our first contribution is the design of new distance oracles with subquadratic space for undirected graphs. We show that introducing a small additive stretch β > 0 allows one to make the multiplicative stretch α arbitrarily small. This sidesteps a known lower bound of α ≥ 3 (for β = 0 and subquadratic space) [Thorup & Zwick, JACM 2005]. We present a DO for graphs with edge weights in [0, W] that, for any positive integer and any c ∈ (0, /2], has stretch (Equation presented), space (Equation presented), and query time O(nc). These are the first subquadratic-space DOs with (1+Ε, O(1))-stretch generalizing Agarwal and Godfrey's results for sparse graphs [SODA 2013] to general undirected graphs. We also construct alternative DOs with even smaller space at the cost of a higher additive stretch. For any integer k ≥ 1, the DOs have a stretch (Equation presented), space (Equation presented), and query time O(nc). Our second contribution is a framework that turns any (α, β)-stretch DO for unweighted graphs into an (α(1+Ε), β)-stretch f-DSO with sensitivity f = o(log(n)/log log n) and retains subquadratic space. This generalizes a result by Bilò, Chechik, Choudhary, Cohen, Friedrich, Krogmann, and Schirneck [STOC 2023, TheoretiCS 2024] for the special case of stretch (3, 0) and f = O(1). We also derandomize the entire construction. By combining the framework with our new distance oracle, we obtain an f-DSO that, for any γ ∈ (0, (+1)/2], has stretch (Equation presented), space (Equation presented), and query time (Equation presented). This is the first deterministic f-DSO with subquadratic space,

关键词： Undirected graphs

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Turbulence Modeling Through Deep Learning: An In-Depth Study of Wasserstein GANs 4

Turbulence Modeling Through Deep Learning: An In-Depth Study...

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4th International Conference on Smart Electronics and Communication, ICOSEC 2023

作者： Alghamdi, Wajdi Mayakannan, S. Sivasankar, G.A. Singh, Jagendra Ravi Naik, B. Venkata Krishna Reddy, Ch. King Abdulaziz University Faculty of Computing and Information Technology Department of Information Technology Jeddah21589 Saudi Arabia Vidyaa Vikas College of Engineering and Technology Tiruchengode Mechanical Engineering Tamilnadu Namakkal India Kit - Kalaignar Karunanidhi Institute of Technology Department of Aeronautical Engineering Coimbatore641402 India School of Computer Science Engineering and Technology Bennett University Uttar Pradesh Great Noida India St. Martin's Engineering College Department of Mechanical Engineering Telangana Secunderabad India Chaitanya Bharathi Institute of Technology Department of Electrical and Electronics Engineering Hyderabad India

ISBN: (纸本)9798350300888

This research study compares the accuracy of different techniques based on deep learning (DL) for predicting turbulent flows. Different types of Generative Adversarial Networks (GANs) are examined in terms of their applicability to the study and simulation of turbulence. Next, we select Wasserstein Gans (WGANs) to produce localized disturbances. Network features including the learning rate and loss function are examined as they pertain to the performance of the WGANs during training on turbulent data gleaned from high-resolution Direct Numerical Simulations (DNS). DNS input data and the generated turbulent structures are proven to agree qualitatively well. The projected turbulent fields are evaluated quantitatively and statistically. © 2023 IEEE.

关键词： Turbulence

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Multi-talker Verbal Interaction for Humanoid Robots

Multi-talker Verbal Interaction for Humanoid Robots

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International Conference on Methods and Models in Automation and Robotics (MMAR)

作者： Bartlomiej Klin Ryszard Beniak Michal Podpora Arkadiusz Gardecki Joanna Rut Faculty of Electrical Engineering Automatic Control and Informatics Opole University of Technology Department of Computer Science Opole University of Technology Faculty of Production Engineering and Logistics Opole University of Technology

ISBN: (数字)9798350362343

ISBN: (纸本)9798350362350

Working in multi-talker mode is viable under certain conditions, such as the fusion of audio and video stimuli along with smart adaptive beamforming of received audio signals. In this article, the authors verify part of the researched novel framework, which focuses on adapting to dynamic interlocutor’s location changes in the engagement zone of humanoid robots during the multi-talker conversation. After evaluating the framework, the authors confirm the necessity of a complementary and independent method of increasing the interlocutor’s signal isolation accuracy. It is necessary when video analysis performance plummets. The authors described the leading cause as insufficient performance during dynamic conversations. The video analysis cannot derive a new configuration when the interlocutor’s speech apparatus moves beyond the expected margin and the video frame rate drops.

关键词： Automation Accuracy Array signal processing Humanoid robots Oral communication Human factors

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A Study of Cryptographic Primitives in the context of Blockchain's Data Integrity and Privacy 11

A Study of Cryptographic Primitives in the context of Blockc...

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11th International Conference on System Modeling and Advancement in Research Trends, SMART 2022

作者： Singh, Ramveer Pooja Agarwal, Ambuj Kumar Naaz, Rohaila Kumar, Raj Vijay, Richa Greater Noida Institute of Professional Studies Greater Noida India School of Engineering and Technology Ct University Ludhiana India School of Engineering and Technology Sharda University Department of Computer Science and Engineering Greater Noida India Teerthanker Mahaveer University Faculty of Engineering and Computing Sciences Moradabad India Department of Computer Applications Faridabad India

ISBN: (纸本)9781665487320

In Today's World, Blockchain is a promising Technology in all areas;things have also been drastically changed after COVID-19;challenges surfaced for implementing blockchain technology in the context of its computational complexity and security. After invention of it in 2008, cryptocurrency applications, i.e., Bitcoin it also getting introduced in Different applications. One of the Major Building blocks of Blockchain is Cryptography techniques. This paper discusses Cryptographic primitives used in different phases of Blockchain implementation and the challenges of implementing these cryptographic primitives. Bitcoin uses Cryptographic primitives to generate public-private key pairs and mining, while Ethereum uses Elliptic curve cryptography to create public-private keys and digital signatures. This paper divided uses of cryptographic primitives into three categories used in Blockchains, i.e., key generation Hashes, signature generation hashes, and proof hashes. © 2022 IEEE.

关键词： Blockchain

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MSAD-Net: Multiscale and Spatial Attention-based Dense Network for Lung Cancer Classification

arXiv

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arXiv 2025年

作者： Roy, Santanu Singh, Shweta Sahu, Palak Suresh, Ashvath Das, Debashish Computer Science and Engineering Department NIIT University Jaipur India Bangalore India Faculty of Computing Engineering and the Built Environment Birmingham City University United Kingdom

Lung cancer, a severe form of malignant tumor that originates in the tissues of the lungs, can be fatal if not detected in its early stages. It ranks among the top causes of cancer-related mortality worldwide. Detecting lung cancer manually using chest X-Ray image or Computational Tomography (CT) scans image poses significant challenges for radiologists. Hence, there is a need for automatic diagnosis system of lung cancers from radiology images. With the recent emergence of deep learning, particularly through Convolutional Neural Networks (CNNs), the automated detection of lung cancer has become a much simpler task. Nevertheless, numerous researchers have addressed that the performance of conventional CNNs may be hindered due to class imbalance issue, which is prevalent in medical images. In this research work, we have proposed a novel CNN architecture "Multi-Scale Dense Network (MSD-Net)" (trained-from-scratch). The novelties we bring in the proposed model are (I) We introduce novel dense modules in the 4th block and 5th block of the CNN model. We have leveraged 3 depthwise separable convolutional (DWSC) layers, and one 1×1 convolutional layer in each dense module, in order to reduce complexity of the model considerably. (II) Additionally, we have incorporated one skip connection from 3rd block to 5th block and one parallel branch connection from 4th block to Global Average Pooling (GAP) layer. We have utilized dilated convolutional layer (with dilation rate=2) in the last parallel branch in order to extract multi-scale features. Extensive experiments reveal that our proposed model has outperformed latest CNN model ConvNext-Tiny, recent trend Vision Transformer (ViT), Pooling-based ViT (PiT), and other existing models by significant margins. All the codes of these experiments along with its graphs and confusion matrix are provided on a GitHub link: https://***/Singhsshweta/Lung-Cancer-Detection. © 2025, CC BY.

关键词： Lung cancer

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Intelligent Online Shopping using ML-based Product Comparison Engine

Intelligent Online Shopping using ML-based Product Compariso...

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International Conference on Inventive Computation Technologies (ICICT)

作者： K Harikirshnan. R Nagavigneshwar. R Vignesh. R. Santhosh R. Reshma Department of Computer Science and Engineering Faculty of Engineering Karpagam Academy of Higher Education Coimbatore Tamil Nadu India

A relatively recent technique for gathering data online is known as scraping. The automated process involves the exploration of e-commerce websites and obtaining certain data, such as pricing, reviews, quality features, etc. Sentiment analysis of product attributes on e-commerce platforms, such as pricing, reviews, quality, etc., can substantially increase user satisfaction in the e-commerce industry. It continues to be difficult to envision precise sentiment analysis. This research work summarizes the product comparison website that implements intelligent web scraping. The website has a processing model that uses the Machine Learning (ML)-based product comparison engine. The simulation analysis for model training and testing uses the GitHub dataset and the Support Vector Machine (SVM) algorithm. The SVM classifies the product from various websites based on the rank value, assigned based on the selected features of the product. The proposed model is compared with other ML algorithms such as Decision Tree, Naïve Bayes, and Random Forest. The comparative analysis shows that the SVM algorithm can classify the best products with the highest accuracy ratio of 94.71%over other algorithms.

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A Hierarchal Clustered Based Proactive Caching in NDN-Based Vehicular Network

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computer Systems science & engineering 2023年第10期47卷 1185-1208页

作者： Muhammad Yasir Khan Muhammad Adnan Jawaid Iqbal Noor ul Amin Byeong-Hee Roh Jehad Ali Department of Computer Science&Information Technology Hazara University Mansehra21120Pakistan Department of Electronics Engineering Kookmin University Seoul Korea Faculty of Computing Riphah International University Islamabad Pakistan Department of AI Convergence Network Ajou UniversitySuwon16499Korea

An Information-Centric Network(ICN)provides a promising paradigm for the upcoming internet architecture,which will struggle with steady growth in data and changes in *** ICN architectures have been designed,including Named Data Networking(NDN),which is designed around content delivery instead of *** data is the central part of the ***,NDN was developed to get rid of the dependency on IP addresses and provide content *** is one of the major research dimensions for this upcoming internet *** research has been carried out to solve the mobility issues,but it still has problems like handover delay and packet loss ratio during real-time video streaming in the case of consumer and producer *** solve this issue,an efficient hierarchical Cluster Base Proactive Caching for Device Mobility Management(CB-PC-DMM)in NDN Vehicular Networks(NDN-VN)is proposed,through which the consumer receives the contents proactively after handover during the mobility of the *** a consumer moves to the next destination,a handover interest is sent to the connected router,then the router multicasts the consumer’s desired data packet to the next hop of neighboring ***,once the handover process is completed,consumers can easily get the content to the newly connected router.A CB-PCDMM in NDN-VN is proposed that improves the packet delivery ratio and reduces the handover delay aswell as cluster ***,the intra and inter-domain handover handling procedures in CB-PC-DMM for NDN-VN have been *** the validation of our proposed scheme,MATLAB simulations are *** simulation results show that our proposed scheme reduces the handover delay and increases the consumer’s interest satisfaction *** proposed scheme is compared with the existing stateof-the-art schemes,and the total percentage of handover delays is decreased by up to 0.1632%,0.3267%,2.3437%,2.3255%,and 3.7313%at the mobil

关键词： Vehicular network named data networking caching hierarchical architecture

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Design Principles for Data-Driven Decision Evaluation

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Procedia computer science 2024年 239卷 563-574页

作者： Nada Elgendy Tero Päivärinta Ahmed Elragal Karoliina Hannula Kaisa Puolitaival M3S Faculty of Information Technology and Electrical Engineering University of Oulu Finland Department of Computer Science Electrical and Space Engineering Luleå University of Technology Sweden Antell Oulu Finland

Human-machine collaboration has potentially led to higher quality and more informed data-driven decisions. However, evaluating these decisions is necessary to measure the benefits, as well as enable experiential learning and posterior rationalization of the results and consequences. Nevertheless, the multiplicity of human-machine collaboration modes, as well as the multi-faceted nature of data-driven decisions complicates evaluation, and evaluation solutions are lacking both in research and in practice. This is further reflected in the complexity of incorporating evaluation in the design of such data-driven decision making systems, since developers are left without theoretically grounded and practically feasible principles to guide implementation. In this paper, we propose a set of five design principles, explicated from theory and practice, for systems implementing data-driven decision evaluation as the output of design science research cycles. The design principles are: 1) multi-faceted evaluation criteria, 2) unified viewpoint, 3) collaborative rationality, 4) processual ex-post evaluation, and 5) adaptive feedback and learning loops. They are further contextualized in the case of AI-enabled menu design at Antell, an innovative pioneer in the restaurant business in Finland, and consequently evaluated by the development managers of the project. Accordingly, the design principles contribute to the knowledge base on metahuman systems and data-driven decision evaluation, by concretizing existing normative concepts into prescriptive knowledge, also guiding future research and generalizing towards a design theory. Furthermore, they provide implementable statements for designing and developing such systems in practice and can be used as a checklist to compare and evaluate existing systems.

关键词： data-driven decision making human-machine collaboration ex-post evaluation collaborative rationality design principles

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Proposal of high attenuating external magnetic field chamber for biological experiments

Proposal of high attenuating external magnetic field chamber...

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International Conference on Computational Problems of Electrical engineering (CPEE)

作者： Marek Bajtoš Robert Cichorowski Roman Radil Ladislav Janoušek Department of Electromagnetic and Biomedical Engineering Faculty of Electrical Engineering and Informational Technology Žilina Slovakia Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Gliwice Poland

ISBN: (数字)9798331506643

ISBN: (纸本)9798331506650

This work presents the design, construction, and validation of a chamber for magnetic field attenuation. Needs of magnetic background controlling during experiments focused on behavior of biological samples exposed to various levels of the low frequency time-varying magnetic field set the motivation for this work. The solution is proposed with regard to the correct cultivation conditions of microbiological samples. The chosen methodology is established on the means of numerical modeling and simulations, as well as 3D printing techniques. The design process incorporates computer-aided design (CAD) software for the chamber proposal, subsequent printing via a 3D printer, followed by the construction of an attenuating chamber using mu-metal foil. The validation process involves measurements of magnetic flux density within the chamber, and comparison thereof with numerical simulations performed via CST Design Studio. All the solution steps resulted in a valid and effective magnetic field attenuation chamber, suitable for use in laboratory conditions.

关键词： Solid modeling Time-frequency analysis Design automation Three-dimensional displays Computational modeling Attenuation Three-dimensional printing Numerical models Magnetic fields Proposals

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Machine Learning and Optimization Approaches for Dissolved Oxygen Prediction in River Systems

Machine Learning and Optimization Approaches for Dissolved O...

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Computational Intelligence Approaches and Applications (ICCIAA), International Conference on

作者： Hazem Alnajjar Nadia Al-Rousan Douaa Al-Rouan Department of Computer Science College of Information Technology University of Petra Amman Jordan Department of computer engineering College of Engineering AlBalqa Applied University Salt Jordan Department of Computer Engineering Faculty of Electrical Engineering and Information Systems German Jordanian University Amman Jordan School of Civil Engineering Universiti Sains Malaysia Nibong Tebal Pulau Pinang MALAYSIA

ISBN: (数字)9798331523657

ISBN: (纸本)9798331523664

This study aims to combine optimization algorithms of feature selection and machine learning models for DO prediction at a water monitoring station. The dataset consisted of water quality indicators from three stations, whose DO was the target variable at the third station. This study used seven optimization algorithms to select the most relevant features. The selected features were then used along with ten machine-learning models for building predictive models. Several models were evaluated based on R 2 , MAE, and MSE metrics. Hence, Gradient Boosting and Random Forest models yielded better prediction results. The results showed high accuracy, reflected by the values of R 2 , which were 0.987 and 0.922 for the training data and 0.769 and 0.745 for the test data, respectively. The findings underscore the effectiveness of combining feature selection with optimized machine learning models for accurate DO prediction, which is essential for monitoring water quality.

关键词： Machine learning algorithms Biological system modeling Water quality Predictive models Prediction algorithms Feature extraction Rivers Water monitoring Optimization Random forests

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