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Identification of benefits, challenges, and pathways in E-commerce industries: An integrated two-phase decision-making model

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Sustainable Operations and Computers 2023年第1期4卷 200-218页

作者： Gupta, Srikant Kushwaha, Pooja.S. Badhera, Usha Chatterjee, Prasenjit Gonzalez, Ernesto D.R. Santibanez Department of Operations and Decision Sciences Jaipuria Institute of Management Jaipur India Department of Business Analytics Jaipuria Institute of Management Indore India Department of Business Analytics Jaipuria Institute of Management Jaipur India Department of Mechanical Engineering MCKV Institute of Engineering West Bengal 711204 India Post-Doctoral Fellow Management Graduate Program Universidade Paulista Indianópolis Campus Brazil Department of Industrial Engineering and CES 4.0 Faculty of Engineering University of Talca Curico Chile

The e-commerce industry has seen significant growth over the past decade as it focuses on convenience and accessibility, leading to a surge in online shopping with more and more consumers opting for it. At the same time, the e-commerce industry faces various challenges. In order to fully harness the potential of this industry, it is important to identify its benefits and challenges and focus on pathways to mitigate the challenges and harness its growth. This study utilizes the Delphi approach and involves experts from the e-commerce domain to get their opinions to identify the top ten benefits, challenges, and pathways for the e-commerce industry. Analytic Hierarchy Process (AHP) and Criteria Importance Through Intercriteria Correlation (CRITIC) methods are subsequently, employed to prioritize the identified factors. Results of the study revealed that factors such as affordable advertising & marketing;availability and product variety;and Global reachability are the most important benefits, while technological upgradation;returns or refunds;and counterfeit products posed the greatest challenges for the industry. Government compliance check;better relationship with delivery partners;and strong data privacy and online security policies emerged as the best pathways. This study also provides valuable insights to businesses, policymakers, and researchers in the e-commerce industry on how to navigate the benefits, challenges, and pathways of this rapidly growing sector. © 2023

关键词： Electronic commerce

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Vehicle Wheel Hub Recognition Method Based on HOG Feature Extraction and SVM Classifier 14

Vehicle Wheel Hub Recognition Method Based on HOG Feature Ex...

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14th International Conference on Information Technology and Electrical engineering, ICITEE 2022

作者： Wang, Bin Juanatas, Ronaldo Niguidula, Jasmin Anhui Technical College of Mechanical and Electrical Engineering Internet and Communications Department Wuhu China Technological University of the Philippines Graduate Program and External Studies Manila Philippines

ISBN: (数字)9781665460774

ISBN: (纸本)9781665460774

In order to avoid the problems of low accuracy of wheel hub recognition and classification and excessive dependence on template image quality in the process of automatic production of the automobile wheel hub, a vehicle wheel hub recognition method based on Histogram of Oriented Gradient (HOG) and Support Vector Machine (SVM) is proposed. Firstly, the wheel hub images under three different lighting conditions are collected, and the wheel hub images are processed in grayscale;Secondly, the positive and negative samples are made, and hog features are extracted, respectively;Finally, the extracted hog features are trained by SVM classifier, and the trained target classifier is used to recognize the wheel hub photos under three different lighting conditions. The experimental results show that this method has higher recognition accuracy than the traditional template matching method under different lighting conditions. © 2022 IEEE.

关键词： Support vector machines

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The benefits of long-duration energy storage for New England's energy system decarbonization goals

Next Energy

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Next Energy 2024年 5卷

作者： Freeman, Sergio Agar, Ertan Department of Mechanical Engineering Energy Engineering Graduate Program University of Massachusetts Lowell Lowell 01854 MA United States

Utilizing a macro-scale energy model alongside 44 years of New England's hourly weather data from MERRA-2, this study investigates the benefits of various combinations of renewable energy technologies, particularly wind and solar, and their integration with long-duration energy storage (LDES) systems. The potential of these renewable energy sources to enhance both the reliability and affordability of New England's power system is evaluated. The findings demonstrate that incorporating LDES into the technology mix leads to a remarkable 55% reduction in overall system costs compared to relying solely on short-duration energy storage (SDES), such as lithium-ion batteries. Additionally, the cost reductions of LDES lead to approximately a 35% increase in the utilization of solar generation. The results suggest that total system costs for LDES are more responsive to relative decreases in power-capacity costs than decreases in energy-capacity costs. Furthermore, the analysis indicates that a combination of different LDES storage technologies can offer the most cost-effective solution for wind-solar power systems. Overall, by examining the interplay between different storage technologies and their impact on system costs, this research contributes significantly to the discourse on sustainable energy solutions. © 2024 The Author(s)

关键词： Energy reliability Long-duration energy storage (LDES) New England Power-to-gas-to-power (P2G2P) Redox flow battery (RFB) Renewable energy

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EXERGETIC ANALYSIS OF A SOLAR ENERGY-BASED HYDROGEN PRODUCTION SYSTEM 23

EXERGETIC ANALYSIS OF A SOLAR ENERGY-BASED HYDROGEN PRODUCTI...

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23rd World Hydrogen Energy Conference: Bridging Continents by H2, WHEC 2022

作者： Akci, Hilal Gunerhan, Huseyin Hepbasli, Arif Ege University Graduate School of Natural and Applied Science Mechanical Engineering Program Bornova Izmir35100 Turkey Ege University Faculty of Engineering Department of Mechanical Engineering Bornova Izmir35100 Turkey Yasar University Faculty of Engineering Department of Energy Systems Engineering Bornova Izmir35100 Turkey

ISBN: (纸本)9786250008430

In this study, energy, exergy and sustainability analyses are performed for a solar energy-based hydrogen production system, which is modeled with TRNSYS and engineering Equation Solver (EES) software packages. This system consists of solar photovoltaic panels (PVs), a controller, an electrolyzer, a metal hydride hydrogen tank used for hydrogen production and storage, and Proton Exchange Membrane Fuel Cell (PEMFC) for electricity storage. Dead state temperature is taken as 0 ºC. The results revealed that the PEMFC had the highest energy efficiency of 53.28%. Exergy efficiencies of the solar PV panel, the electrolyzer and the PEMFC were determined to be 9.66%, 60% and 29.39%, respectively. The exergetic sustainability index of the electrolyzer had the maximum value of 2.501. © 2022 Proceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents by H2. All rights reserved.

关键词： Hydrogen production

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Improving Control Theory Education Through Face-to-Face Implementation of a Mobile Robotics Methodology

Improving Control Theory Education Through Face-to-Face Impl...

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2024 Brazilian Symposium on Robotics (SBR), and 2024 Workshop on Robotics in Education (WRE)

作者： M. A. Pastrana William Humberto Cuéllar Sánchez Jose Mendoza-Peñaloza M. S. Santana Daniel M. Muñoz Department of Mechanical Engineering Mechatronics Graduate Program University of Federal District UDF Brasilia DF Brazil Faculty of Gama Electronics Engineering Undergraduate Program University of Brasilia Brasilia DF Brazil

ISBN: (数字)9798350391084

ISBN: (纸本)9798350391091

Advances in information and communication technologies have significantly transformed engineering education. Virtual laboratories are increasingly adopted to enhance student interaction with control system simulations. The improved visualization and interaction capabilities of modern computers offer a more organic way to teach theoretical foundations. This paper describes the implementation of a methodology for teaching control theory that until now was entirely online in a face-to-face environment at the University of the Federal District in Brasilia, Brazil. This methodology utilizes virtual laboratories with CoppeliaSim, MATLAB, and the EVA mobile robot to teach control theory focused on single-input, single-output (SISO) systems for mobile robot tracking and obstacle avoidance applications. The results of the face-to-face implementation are compared to those of the fully online methodology, revealing that in-person teaching significantly enhances the quality of instruction.

关键词： Visualization Mechatronics Educational robots SISO Education Laboratories Software Control theory Mobile robots MATLAB

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Toward Learning Factory for Industry 4.0: Virtual Reality (VR) for Learning Human–Robot Collaboration 1

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International Conference on Innovative Technologies in Intelligent Systems and Industrial Applications, CITISIA 2022

作者： Ariansyah, Dedy Colombo, Giorgio Pardamean, Bens Bioinformatics and Data Science Research Centre Bina Nusantara University Jakarta11480 Indonesia Department of Mechanical Engineering Politecnico di Milano Milan20156 Italy Computer Science Department BINUS Graduate Program Master of Computer Science Program Bina Nusantara University Jakarta11480 Indonesia

ISBN: (数字)9783031290787

ISBN: (纸本)9783031290770

Industry 4.0 will bring not only transformation to the manufacturing technologies but also to the profile of the workforce. Education system should be revised to prepare the future graduates embracing the knowledge of the ongoing revolution. Initiatives on the modification of curriculum and tools to deliver the concepts of Industry 4.0 must be taken. This paper examines limitations of current engineering tools and proposes a virtual reality (VR)-based learning platform to support the teaching and learning activity for Industry 4.0, focusing on the design of Human–robot Collaboration (HRC). The development process began with the identification of the general Intended Learning Outcomes (ILOs) which were extracted from the review of the HRC design issues, followed by the evaluation of the current teaching tool. From these results, the new requirements of the tools to achieve ILOs are redefined. The implementation of the system is demonstrated to show the feasibility of the proposed learning platform. This workflow can serve as initial development of another learning platform for the other innovative concepts that form the building blocks of Industry 4.0. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.

关键词： Industry 4.0

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Pose Control With an Input-to-state Safe Control Barrier Function for Rigid Body Motion

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, Information and Systems 2023年第1期143卷 67-75页

作者： Murao, Toshiyuki Matsumoto, Kosuke Kawai, Hiroyuki Ibuki, Tatsuya Fujita, Masayuki College of Engineering Kanazawa Institute of Technology 7-1 Ohgigaoka Nonoichi Ishikawa921-8501 Japan Graduate Program in Mechanical Engineering Kanazawa Institute of Technology 7-1 Ohgigaoka Nonoichi Ishikawa921-8501 Japan School of Science and Technology Meiji University 1-1-1 Higashimita Tama-ku Kawasaki Kanagawa214-8571 Japan Graduate School of Information Science and Technology The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan

In this paper, we present a pose control method for rigid body motion via an input-to-state safe control barrier function (ISSf-CBF). The control objective is that a mobile robot converges to the desired pose with avoiding any obstacles under input disturbances. First, we derive a control error system to discuss stability via the Lyapunov method. Through the kinematic model for a rigid body, we design an ISSf-CBF for obstacle avoidance under input disturbances. Next, we present a control Lyapunov function (CLF) for the control error system. By using the ISSf-CBF and the CLF, we discuss a unified quadratic program formulation that ensures both safety and stability for pose control of rigid body motion under input disturbances. Our proposed approach, which deals with both the position and the orientation of rigid body motion, connects the safety and the stability via the ISSf-CBF and the CLF. Finally, simulation and experimental results confirm the validity of the proposed ISSf-CBF control method compared to the stabilizing one. ©c 2023 The Institute of Electrical Engineers of Japan.

关键词： Lyapunov methods

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Development of a Gesture Analysis System for Human System Interaction

Development of a Gesture Analysis System for Human System In...

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International Symposium on Soft Computing and Intelligent Systems (SCIS)

作者： Chifuyu Matsumoto Yuka Sone Jinseok Woo Yasuhiro Ohyama Sustainable Engineering Program Graduate School of Engineering Tokyo University of Technology Hachioji Tokyo Japan Department of Mechanical Engineering School of Engineering Tokyo University of Technology Hachioji Tokyo Japan

ISBN: (数字)9798350373332

ISBN: (纸本)9798350373349

Recently, Japan has been facing various social issues, and to solve these problems, it is necessary to create a society where diverse people can live comfortably. To build such a society, appropriate support tailored to individuals is required, necessitating the analysis of various types of information to understand the people's needs at any given moment. In particular, analyzing non-verbal elements such as posture, facial expressions, and gestures is crucial, as these naturally indicate a person's condition. Therefore, this study focuses on human gestures, one of the non-verbal elements, and proposes a gesture recognition method using Dynamic Time Warping (DTW) and K-Means. We demonstrated that symbolic gesture recognition is possible by recording arm trajectories from skeletal measurements with an RGB-D camera.

关键词： Shape Time series analysis Gesture recognition Cameras Trajectory Recording

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Feasibility Study of a Teleoperation System With Haptics for Tip-Force Sensing Active Needles

Feasibility Study of a Teleoperation System With Haptics for...

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IEEE/RAS-EMBS International Conference on Biomedical Robotics and Biomechatronics (BioRob)

作者： Sooyeon Kim Sujin Yu Yuri Lim Suhyun Lee Seok Chang Ryu Department of Mechanical and Biomedical Engineering BioRobotics Laboratory Graduate Program in Smart Factory Ewha Womans University Seoul South Korea Department of Mechanical and Biomedical Engineering BioRobotics Laboratory Ewha Womans University

ISBN: (数字)9798350386523

ISBN: (纸本)9798350386530

This paper presents the design of a teleoperation system with a haptic display for the active needles with tip-force sensing and tip-steering capabilities. The active needle design employs sensorized tendons by fiber Bragg gratings sensor (FBGs), while the teleoperation system combines a general haptic interface with electrical stimulation as its steering interface, delivering not only general force feedback but also tip-force information measured by the FBGs-based tendons to the operators. The essential features, such as tip-force sensing, teleoperation of the tip-joint, and human perception of the measured tip-force, were experimentally evaluated with their prototypes in tissue phantoms. Based on the results obtained, necessary follow-up studies were identified and suggested for the effective teleoperation of force-sensing steerable instruments in clinical environments. If successfully developed, such systems can enable surgeons to perceive clinical situations and perform operations more precisely and safely.

关键词： Instruments Surgery Prototypes Phantoms Biomedical measurement Robot sensing systems Needles Fiber gratings Sensors Tendons

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Injectable Platelet-Rich Fibrin in Contact with Bone Substitutes, Porous Zirconia, or Laser-Textured Implant Surfaces: A Detailed Morphological Analysis

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Biomedical Materials and Devices 2024年第1期2卷 415-426页

作者： Oliveira, Miguel Noronha Varela, Hugo Almeida Nascimento, Rubens M. Sahoo, Narayan Carvalho, Oscar Henriques, Bruno Souza, Júlio C. M. Ceramic and Composite Materials Research Group (CERMAT) Department of Mechanical Engineering (EMC) Federal University of Santa Catarina (UFSC) Post-graduate Program in Materials Science and Engineering Federal University of Rio Grande Norte (UFRN) Center for MicroElectroMechanical Systems (CMEMS-UMINHO) Universidade do Minho LABBELS - Associate Laboratory University of Minho University Institute of Health Sciences (IUCS) CESPU

The aim of the present study was to perform a detailed morphological analysis of an injectable platelet rich fibrin after combination with two different particulate hydroxyapatite-based granules, a porous zirconia block, and laser-textured zirconia or titanium surfaces. Blood samples were harvested from three participants to prepare the flowable injectable PRF in contact or not with particulate hydroxyapatite (Hap), bone mineral granules (DBBM), porous zirconia blocks, laser-textured titanium or zirconia surfaces. Optical and scanning electron microscopy (SEM) were used to evaluate the fibrin network density, fibrin fibers’ diameter, blood cells, and the interaction of PRF with the biomaterials. Histomorphometry of the flowable PRF was also performed using the hematoxylin–eosin staining protocol. Specimens were independently evaluated by two blinded and well-trained researchers in histomorphometry and microscopy. Particulate Hap and DBBM shown different morphological aspects by SEM analyses since DBBM revealed macro- and micro-scale pores while Hap revealed a dense structure. Hydroxyapatite and DBBM granules were entirely embedded by the fibrin-network in the presence of leukocytes and blood platelets. The zirconia porous structured was filled with PRF and its components. Also, the laser-structured zirconia or implant surfaces were entirely coated with the PRF fibrin network embedding leukocytes and blood platelets. Laser-textured titanium surfaces revealed macro- and micro-scale irregularities that increase the surface area and retention of the injectable PRF. Histomorphometric analyses revealed complementary details on the distribution of lymphocytes, red blood cells, and fibrin associated with platelet aggregation. The flowing and viscosity of an injectable platelet rich fibrin provided an agglomeration of synthetic or xenogeneic particulate bone substitutes and the coating of porous zirconia and textured implant surfaces as inspected by scanning electron microsc

关键词： Bone healing Bone substitutes Histology Morphology Platelet-rich fibrin

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