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Enhanced nearest centroid model tree classifier

discover Computing 2025年第1期28卷 1-18页

作者： Özçelik, Mehmet Hamdi duman, Ekrem Bağrıyanık, Selami Bulkan, Serol Applied Analytics AA Istanbul Turkey Department of Industrial Engineering Marmara Üniversitesi Mühendislik Fakültesi M5 Blok Endüstri Mühendisliği Bölümü Aydınevler Mah Maltepe Istanbul 34840 Turkey Özyeğin University Istanbul Turkey Bahçeşehir UniversityWingie Enuygun Group R & D Center Technology Istanbul Turkey Department of Computer Engineering İstanbul Health and Technology University İstanbul Turkey

In this study, first, we improved an existing variant of the Nearest Centroid algorithm. In this new version, the predictive power of features and within-class variances are used as weights in distance calculation. This version is called the Enhanced Nearest Centroid (ENC). Second, we proposed a new model tree algorithm for binary classification. It is named as the Enhanced Nearest Centroid Model Tree (ENCMT). The model tree is built using ENC at each leaf node of the decision tree. To evaluate the performance of the new model tree, we used an independent test platform and ran the algorithm on 30 binary datasets available therein. results showed that ENCMT improves the performance of the decision tree algorithm. We also compared ENCMT with the Logistic Model Tree (LMT) algorithm and showed that it outperforms LMT as well. We also designed a bagging algorithm where ENCMT is used to build a random forest. Our comparison results show that its performance is significantly better than the random Forest (rF) algorithm. © The Author(s) 2025.

关键词： Binary classification Information value Model tree Nearest centroid classifier

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Path Percolation in Quantum Communication Networks

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Physical review Letters 2025年第3期134卷 030803-030803页

作者： Xiangyi Meng Bingjie Hao Balázs ráth István A. Kovács Department of Physics Applied Physics and Astronomy Rensselaer Polytechnic Institute Troy New York 12180 USA Department of Physics and Astronomy Northwestern University Evanston Illinois 60208 USA Department of Stochastics Institute of Mathematics Budapest University of Technology and Economics H-1111 Budapest Hungary HUN-REN-BME Stochastics Research Group H-1111 Budapest Hungary Alfréd Rényi Institute of Mathematics H-1053 Budapest Hungary Northwestern Institute on Complex Systems Northwestern University Evanston Illinois 60208 USA Department of Engineering Sciences and Applied Mathematics Northwestern University Evanston Illinois 60208 USA

In a quantum communication network, links represent entanglement between qubits located at different nodes. Even if two nodes are not directly linked by shared entanglement, they can still communicate via routing protocols. However, in contrast to classical communication, each quantum communication event removes all participating links along the routed path, disrupting the quantum communication network. Here, we propose a simple model, where randomly selected pairs of nodes communicate through the shortest paths. Each time such a path is used, all participating links are eliminated, leading to a correlated percolation process that we call “path percolation.” We study path percolation both numerically and analytically and present the phase diagram of the steady states as a function of the rate at which new links are being added to the network. As a key result, the steady state is found to be independent of the initial network topologies when new links are added randomly between disconnected components. We close by discussing extensions of path percolation and link replenishment, along with their potential applications.

关键词： Quantum entanglement

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Integration of recognition and planning for robot hand grasping

Integration of recognition and planning for robot hand grasp...

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International Conference on Ubiquitous robots and Ambient Intelligence (UrAI)

作者： Yong-deuk Shin Ga-ram Jang Jae-Han Park Ji-Hun Bae Moon-Hong Baeg Applied Robot Technology R & D Group Korea Institute of Industrial Technology Korea

A robot should be able to recognize and estimate the pose of an object in order to grasp it. In addition, the robot should be able to infer the most reasonable strategy for grasping the object, which varies according to the type and pose of the object. In this paper, we design a grasping strategy engine for this purpose and suggest a method for recognizing and estimating the pose of an object with no two-dimensional intensity image. We also introduce our grasping data acquisition system (GdAS) for learning the best grasping strategy. The grasping strategy is composed of the approaching vector, opposition vector, and grasping type. In this paper, we use the iterative closest point (ICP) [1] algorithm for recognizing and estimating the pose of an object, along with an artificial neural network for selecting the best grasping strategy.

关键词： Grasping Iterative closest point algorithm Three-dimensional displays databases Estimation robots Vectors

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Interactive remote robot operation framework for rescue robot

Interactive remote robot operation framework for rescue robo...

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IEEE International Workshop on Safety, Security, and rescue robotics (SSrr)

作者： Yong-deuk Shin Jae-Han Park Ga-ram Jang Jae-Shik Yoon Moon-Hong Baeg Applied Robot Technology R&D Group Korea Institute of Industrial Technology Korea

Situation awareness and its ambiguities are some of the main problems for rescue robotics. In a disaster area, there are many obstacles and confined passages. The operator must perceive the environment and decide the robot motion based on limited sensor data. These make it difficult for the operator to perceive the situation. The operator should be aware of the relative size of the obstacles in comparison with the rescue robot and the direction of the robot to navigate the disaster area and avoid collisions with obstacles. In this paper, we propose a software framework to reduce these ambiguities. A 3d map constructed with a 3d laser scanner and a robot model in this map can reduce the ambiguities. We also estimate future robot paths using the control inputs. Then, we perform collision detection in the expected paths and their neighbors. The collision results are displayed in the reconstructed 3d map using iterative closest points(ICP) algorithm. In this paper, we define interactive remote robot operation(IrrO) by extracting the common properties for reducing the ambiguities and abstracting them. The IrrO is composed of two parts, a simulation and evaluation step for the future robot motion and an interactive user interface system.

关键词： robot sensing systems Three-dimensional displays Irrigation Image reconstruction robot motion robot kinematics

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Natural changing of emotional expression by considering correlation of behavior history

Natural changing of emotional expression by considering corr...

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IEEE International Symposium on Consumer Electronics

作者： Ahn, Ho Seok Choi, Jin Young Lee, dong-Wook Shon, Woong Hee Department of Applied Robot Technology Convergent Technology R and D Division Korea Institute of Industrial Technology 1271-18 Sa-3-dong Sangrok-gu Ansan 426-910 Korea Republic of

ISBN: (纸本)9781612848433

This paper presents a novel method for natural changing of emotional expression. Although formal behavior generation method using the simulated annealing algorithm selects various behaviors, there are weak correlations among behavior history. To make strong correlations, we restrict the randomness of the simulated annealing algorithm. This method sifts unapt candidate behavior combinations out by considering the previous behavior combinations and makes adequate range of candidate behavior combinations. We have verified the continuity of the proposed method using a cyber robot simulator. © 2011 IEEE.

关键词： Simulated annealing

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Parallel Implementations of digital Focus Indices Based on Minimax Search Using Multi-Core Processors

Parallel Implementations of Digital Focus Indices Based on M...

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作者： Kim, HyungTae Lee, duk-Yeon Choi, dongwoon Kang, Jaehyeon Lee, dong-Wook Digital Transformation R&D Department Korea Institute of Industrial Technology Ansan Gyeonggi15588 Korea Republic of Applied Robot R&D Department Korea Institute of Industrial Technology Ansan Gyeonggi15588 Korea Republic of

A digital focus index (dFI) is a value used to determine image focus in scientific apparatus and smart devices. Automatic focus (AF) is an iterative and time-consuming procedure;however, its processing time can be reduced using a general processing unit (GPU) and a multi-core processor (MCP). In this study, parallel architectures of a minimax search algorithm (MSA) are applied to two dFIs: range algorithm (rA) and image contrast (CT). The dFIs are based on a histogram;however, the parallel computation of the histogram is conventionally inefficient because of the bank conflict in shared memory. The parallel architectures of rA and CT are constructed using parallel reduction for MSA, which is performed through parallel relative rating of the image pixel pairs and halved the rating in every step. The array size is then decreased to one, and the minimax is determined at the final reduction. Kernels for the architectures are constructed using open source software to make it relatively platform independent. The kernels are tested in a hexa-core PC and an embedded device using Lenna images of various sizes based on the resolutions of industrial cameras. The performance of the kernels for the dFIs was investigated in terms of processing speed and computational acceleration;the maximum acceleration was 32.6× in the best case and the MCP exhibited a higher performance. Copyright © 2023 KSII.

关键词： Iterative methods

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Supervised segmentation of textures in backscatter images

Supervised segmentation of textures in backscatter images

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16th International Conference on Pattern recognition, ICPr 2002

作者： Pacific, Pavel duin, robert P.W. Van Kempen, Geert M.P. Kohlus, reinhard Faculty of Applied Science Pattern Recognition Group Delft University of Technology Netherlands Unilever R and D Vlaardingen Netherlands

ISBN: (纸本)0769516963

In this paper we present an application of statistical pattern recognition for segmentation of backscatter images (BSE) in product analysis of laundry detergents. Currently, application experts segment BSE images interactively which is both time consuming and expert dependent. We present a new, automatic, procedure for supervised BSE segmentation which is trained using additional multi-spectral EdX images. Each time a new feature selection procedure is employed to find a convenient feature subset for a particular segmentation problem. The performance of the presented algorithm is evaluated using ground-truth segmentation results. It is compared with that of interactive segmentation performed by the analyst. © 2002 IEEE.

关键词： Image segmentation

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Supervised segmentation of textures in backscatter images

Supervised segmentation of textures in backscatter images

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作者： Paclík, Pavel duin, robert P. W. Van Kempen, Geert M. P. Kohlus, reinhard Pattern Recognition Group Faculty of Applied Science Delft University of Technology Netherlands Unilever R and D Vlaardingen Netherlands

关键词： Image segmentation

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TeO2: As a key component in improving radiation shielding of B2O3-based glass systems

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radiation Physics and Chemistry 2025年

作者： Sayyed, M.I. Yasmin, Sabina Faruque, M.r.I. Abdullah, S. Mahmoud, K.A. Khandaker, M.U. Department of Physics Faculty of Science Isra University Amman Jordan Renewable Energy and Environmental Technology Center University of Tabuk Tabuk47913 Saudi Arabia Universiti Kebangsaan Malaysia Selangor Bangi43600 UKM Malaysia R&D Office Vice Presidency for Scientific Research and Innovation Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam31441 Saudi Arabia Ural Federal University 19 Mira St Yekaterinburg620002 Russia Applied Physics and Radiation Technologies Group CCDCU Faculty of Engineering and Technology Sunway University Selangor Bandar Sunway47500 Malaysia Faculty of Graduate Studies Daffodil International University Daffodil Smart City Birulia Savar Dhaka1216 Bangladesh Department of Physics College of Science Korea University 145 Anam-ro Seongbuk-gu Seoul02841 Korea Republic of Department of Physics and Technical Sciences Western Caspian University Baku Azerbaijan

New glasses with enhanced radiation shielding characteristics have potential applications in different fields requiring radiation protection. In the context of radiation shielding applications, this work aims to develop new lead-free B2O3–TeO2–Bi2O3–ZnO–CaO glass systems. A 15–30 mol% increase in TeO2 concentration results in a 4.070–4.498 g/cm3 density increase. The influence of increasing the TeO2 doping concentration on the mechanical properties of the prepared boro-tellurite glass was utilized using the Makishima-Makinze theory. Additionally, the influence of raising the TeO2 concentration on the radiation shielding properties of the prepared boro-tellurite glass was studied using the Monte Carlo simulation. The Monte Carlo simulation confirms that a 15–30 mol% TeO2 increase enhances LAC values, reducing half-value layer thickness (HVL), and improving radiation shielding. However, mechanical properties such as hardness and Young's modulus slightly decrease due to TeO2 substitution. © 2025 Elsevier Ltd

关键词： radiation shielding

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Microstructure and mechanical properties of die-cast AZ91d magnesium alloy by Pr additions

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Transactions of Nonferrous Metals Society of China 2010年第B07期20卷 435-438页

作者：崔晓鹏刘海峰孟健张德平 Department of Materials Science and Engineering Key Laboratory of Advanced Structrural Materialsof Ministry of EducationChangchun University of Technology State Key Laboratory of Rare Earth Resources Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences R&D Centre of Foundry Corporation FAW Group Corporation

Mg-9Al-xPr(x=0.4,0.8 and 1.2,mass fraction,%)magnesium alloys were prepared by high-pressure die-casting *** effects of Pr on the microstructures of die-cast Mg-9Al based alloy were investigated by Xrd and ***-like Al11Pr3 phase and polygon Al6Mn6Pr phase are found in the *** 0.4%Pr addition,fine needle-like Al11Pr3 phase and a small amount of polygon Al6Mn6Pr phase near the grain boundary are found in the *** Pr addition to 0.8%, lots of coarse needle-like Al11Pr3 phase within grain and polygon Al6Mn6Pr phase on grain boundary are *** increasing Pr addition,the size of needle-like Al11Pr3 phase decreases,while the size of polygon Al6Mn6Pr relatively *** mass fraction of Pr at around 0.8%is considered to be suitable to obtain the optimal mechanical *** optimal mechanical properties are mainly resulted from grain boundary strengthening obtained by precipitates and solid solution.

关键词： praseodymium magnesium alloy microstructure mechanical properties

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