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Modeling a fuzzy expert system for predicting customers’ behavioral intention for restaurant business through parallel prediction of perceived values and satisfactions

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International Journal of Information Technology (Singapore) 2025年第2期17卷 1007-1014页

作者： Akhtaruzzaman, M. Shahryer, Fahim Halder, Sachitra Tanvin, Jamal Uddin Department of Computer Science and Engineering Military Institute of Science and Technology (MIST) Mirpur Cantonment Dhaka 1216 Bangladesh Quantum Robotics and Automation Research Group (QRARG) Dhaka Bangladesh

This paper focuses on the modeling of a recommendation process for the restaurant industry. It is a challenge job for a restaurant owner to ascertain the intentions of customers to evaluate their services, further improve their profit margin. So, the objective of this study is to design a fuzzy-based prediction model of customers’ intentions for a fine dining experience. To facilitate a comparative analysis and to identify the optimal approach, various membership functions (MF) and de-fuzzification methods are employed along with the analysis of the correlational behavior among various input subsets. Results have shown that CoA method with triangular MF are well enough to implement the model. The fuzzy-correlation analysis presents various levels of membership strengths for a same recommendation score in some cases. Moreover, the evaluation of the proposed model based on a custom dataset shows prominent results with as 0.938. © Bharati Vidyapeeth's Institute of Computer Applications and Management 2024.

关键词： Customer intension Customer satisfaction FIS Perceived value Recommendation

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Stiffness and Vibration Resistance Analysis of Isotropic Stewart Platform (ISP) and Common Stewart Platform (CSP) 23

Stiffness and Vibration Resistance Analysis of Isotropic Ste...

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23rd International Conference on Control, automation and Systems, ICCAS 2023

作者： Tileukulova, Aisulu Rakhmetova, Perizat Yeshmukhametov, Azamat Koganezawa, Koichi Al-Farabi Kazakh National University Department of Physics and Technology Almaty Kazakhstan Nazarbayev University Department of Robotics Engineering Astana Kazakhstan Satbayev University Department of Robotics and Engineering Tools of Automation Almaty Kazakhstan School of Engineering and Digital Sciences Nazarbayev University Department of Robotics Engineering Astana Kazakhstan Tokai University Department of Mechanical Engineering Japan

ISBN: (纸本)9788993215274

Parallel manipulators found wide applications in the industry such as entertainment, heavy, and aerospace industries. However, the contemporary growth of the economy and industry demands additional and exceptional capabilities for robots. Parallel manipulator applications in the industry are pretty specific and complex rather than serial manipulators. Therefore in this research, we proposed an isotropic Stewart parallel manipulator to enhance robot stiffness and payload capacity capabilities. Moreover, proves the concept by experimental methods. The main contribution of this paper is to rely on robot design, joint positions, and comparison of experimental results to prove the concept idea. The research paper is organized in the following order: introduction, design concept, joint positions and simulation, experimental results, and conclusion. © 2023 ICROS.

关键词： Stiffness

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An effect of process parameters during wire cut electrical discharge machining of Inconel 738 3

An effect of process parameters during wire cut electrical d...

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3rd International Conference on Sustainable Energy Solutions for a Better Tomorrow, SESBT 2022

作者： Devanathan, C. Natarajan, M.S. Shankar, E. Giri, R. Vigneshwaran, K. Department of Mechanical Engineering Rajalakshmi Engineering College Chennai602 105 India Department of Robotics and Automation Rajalakshmi Engineering College Chennai602 105 India

In the recent days, super alloys especially nickel based materials are used more than 50% of aerospace gas turbine components such as turbine disc, blades etc., It becomes very hard to shape these materials with the use of traditional machining processes due to its improved strength at higher temperature. To overcome the issues faced during conventional machining, the various advanced machining techniques are tried for machining these super alloys. In the present study, Inconel 738 was cut by wire electrical discharge machining using 0.25 mm diameter copper wire. Demineralized water was used as dielectric fluid between tool and workpiece electrode. During the process, voltage, wire feed rate, time of pulse on and pulse off were adjusted at four different values and totally sixteen slots were cut to analyze the machining characteristics. The machined surfaces were tested for its surface finish, rate of material removal and kerf width. The ANOVA was performed using Minitab software to find out the optimized variables and percentage contribution of each parameter in providing the influencing results. Wire feed rate was the most influencing parameter to have the lowest kerf width. As far as Material removal rate, the four parameters were had the significant impact in increasing the MRR. Voltage is the important process parameter to reduce the surface roughness. © 2023 Elsevier Ltd. All rights reserved.

关键词： Surface roughness

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Wear Analysis of copper based surface composites prepared by friction stir processing

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Materials Today: Proceedings 2022年 62卷 475-480页

作者： Loganathan, K. Hariram, S. Devanathan, C. Giri, R. Kumar, S. Department of Mechanical Engineering Rajalakshmi Engineering College Chennai Thandalam 602 105 India Department of Robotics and Automation Rajalakshmi Engineering College Chennai Thandalam 602 105 India

Copper based surface composites are widely getting importance in various applications because of their decent mechanical, tribological and thermal properties. In the present experimental work, an attempt was made to prepare the surface composites with copper material as substrate using friction stir processing method. Three specimens were prepared by adding aluminium oxide, boron carbide and the mixture of both particles to the surface of the copper and stirred using a square pin profiled tool. The various process parameters of the friction stir process were maintained constant. The wear behaviour of the specimen such as wear rate, coefficient of friction, and friction force was studied using Pin on disc method. The test results revealed that hybrid surface composites had better wear resistance due to/ the low coefficient of friction and friction force followed by boron carbide and aluminium oxide particles mixed surface composites. The friction force was 20 times higher than the friction coefficient and this factor remains constant for the entire test run. © 2022

关键词： Aluminum oxide

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Enhancement of Material Properties of AZ80 Mg Alloy Processed by Combined Severe Plastic Deformation

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Journal of Bio- and Tribo-Corrosion 2025年第1期11卷 1-12页

作者： Danappa, G.T. Nagaraj, C. Mahesh, K. Dutt Mahantesh, M. Math Rajesh, K. Bavan, Saravana Department of Mechanical Engineering Government Engineering College Karnataka Huvinahadagali583219 India Department of Mathematics Dayananda Sagar Academy of Technology and Management Bangalore560082 India Department of Mechanical Engineering Dayananda Sagar Academy of Technology and Management Bangalore560082 India Department of Mechanical Engineering RV College of Engineering Bengaluru560059 India Department of Robotics and Automation Symbiosis Institute of Technology Symbiosis International [Deemed University Maharashtra Pune422115 India Department of Mechanical Engineering Dyananda Sagar University Bengaluru560068 India

The process of bringing about a novel microstructure can be a good way of improving on the uses of magnesium and its alloys. This study examines the AZ80 Mg with an ultra-fine grain (UFG) that has an average grain size of less than 1 µm by the use of equal channel angular pressing (ECAP), rolling, and multi-direction forged (MDF) processes in combination. The present UFG structure offers better performance characteristic as structural material for Mg alloy. From the as-received state, the AZ80 Mg alloy has better mechanical properties with UTS of 367 MPa and elongation of 16% after the three MDF passes with addition of further two ECAP passes and two passes of rolling. Similarly, the as-received Mg alloy had a corrosion rate of 13.74 mm/y. conventionally, the MDF-3P followed by the ECAP-2P enabled the AZ80 alloy to be improved to 3.69 mm/y. Thus, the corrosion rate has been significantly reduced to 0.95 mm/y using the synergistic treatment of MDF, ECAP, and rolling. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.

关键词： Magnesium alloys

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A Study on Laser Beam Machining and Prediction of Surface Finish and Material Removal Rate by Fuzzy Clustering 1st

A Study on Laser Beam Machining and Prediction of Surface Fi...

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1st International Conference on Energy and Materials Technologies, ICEMT 2021

作者： Devanathan, C. Giri, R. Dhandapani, S. Muthiah, C.T. Sivanand, A. Department of Mechanical Engineering Rajalakshmi Engineering College Thandalam Chennai602105 India Department of Robotics and Automation Rajalakshmi Engineering College Thandalam Chennai602105 India

ISBN: (纸本)9789811938948

Laser beam machining is a non-traditional manufacturing method which melts, vaporizes and thermally changes the characteristics of the material by focusing a monochromatic coherent light beam on the workpiece. This research article focuses on studying the laser beam machining of mild steel material by varying the input parameters like cutting speed, gas pressure and laser power. The parameters were varied in three levels, and totally, nine experiments were conducted based on orthogonal array. The output parameters such as material removal rate and surface roughness were analyzed, and the experimental results revealed that cutting speed and laser power were the most dominating parameter for getting good surface refinish and better material removal rate, respectively. The interaction effects of the parameters were also significant. The fuzzy c-means (FCM) clustering and fuzzy subtractive clustering (FSC)-based fuzzy inference systems are modeled to predict the output characteristics material removal rate (MRR) and surface roughness. It is found that the fuzzy subtractive clustering-based fuzzy inference systems are very effective in predicting the outputs. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Surface roughness

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Real-Time Operating System for Multitasking Control in the robotics and automation Industry

Real-Time Operating System for Multitasking Control in the R...

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2023 International Conference on Intelligent Data Communication Technologies and Internet of Things, IDCIoT 2023

作者： Sayyad, Javed Jatti, Ashwini Attarde, Khush Ramesh, B.T. Deokar, Shubhangi Robotics and Automation Department Lavale Maharashtra Pune India Computer Science and Engineering Lavale Maharashtra Pune India

ISBN: (纸本)9781665474511

Real-Time Operating System (RTOS) is an Operating System (OS) that does a task in a constrained time. The RTOS is integrated with the microprocessor or microcontroller for specialized applications where the time-bound completion of the task is very much substantial. ESP32 is a microcontroller that comes with a package of advantageous and suitable features for RTOS. The ability of equipment like motors, sensors, and actuators to multitask is critical in the robotics and automation (R&A) industry. In industries, a dedicated/centralized system allocated for a particular activity is not economically feasible;yet, when performing several tasks, some delay or lag is introduced in the task. Consequently, the proposed solution for industrial multitasking is cost-effective and efficient. The RTOS is suitable for machines constrained to do painstaking work, like a robotic arm or CNC drilling. In the R&A industry, a hardware interruption is often critical for an emergency, which may also be accomplished using RTOS. In such applications, implementing a software timer is also essential to delay a task for a period of time. Stepper and servo motors are widely employed in the R&A industries for various applications. This article presents the multitasking of four stepper motors and the introduction of a software timer, which will be developed when the stepper motor multitasking is implemented. For multitasking, the FreeRTOS library will be utilized. © 2023 IEEE.

关键词： Microcontrollers

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Investigations on the Design and Simulation of Smart Irrigation Robot for Nurseries 3

Investigations on the Design and Simulation of Smart Irrigat...

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3rd International Conference on Advances in Computing, Communication, Embedded and Secure Systems, ACCESS 2023

作者： Abhiram, B. Jha, Swati Sai Prasad, Y. Yogendra Dhanraj, Joshuva Arockia Ramkumar, V. Hindustan Institute of Technology and Science Centre for Automation & Robotics Department of Mechatronics Engineering Tamil Nadu Chennai India

ISBN: (纸本)9798350346169

The irrigation systems in nurseries can be the cause of various water supply errors- ranging from lack of sufficient water supply to over-watering and imbalance in the water pH levels. Based on the statistics recorded by the department of agriculture and farmers welfare, we have conducted we concluded that the water supply management and plant life maintenance are the major problems. Considering all these real-time errors, we have designed a smart irrigation robot functioning on the inputs from a group of soil moisture sensors which helps eliminate the monotonous task of monitoring and keeping records of the change in soil moisture. © 2023 IEEE.

关键词： Irrigation

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Assessing Lower Limb Movement Performance in Elderly Individuals Using a Nanocomposite E-Textile Sensor 16

Assessing Lower Limb Movement Performance in Elderly Individ...

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16th IEEE International Conference on Nano/Molecular Medicine and engineering, NANOMED 2023

作者： Zou, Xiaoyang Li, Xiaoting Xue, Jiaqi Chan, Colin Pak Yu Li, Ziqi Zhang, Jing Lai, King Wai Chiu City University of Hong Kong Centre for Robotics and Automation Department of Biomedical Engineering Hong Kong Hong Kong

ISBN: (纸本)9798350343700

The knee joint is one of the most important joints in our lower body, affecting humans' lower limb activities. For instance, the knee joint can even bear three to four times the human body's weight when running and climbing. The knee joint is prone to degenerative lesions for older people as they age, which significantly affects their daily lives. Therefore, long-term and real-time assessment of lower-limb motions in older people is crucial for their lower-limb health detection. In this work, we developed wearable knee sensors based on nanocomposite e-textile strain sensors for detecting knee joints' range of motion (ROM) while older people perform lower-limb activities. A total of ten features were extracted to characterize their STS performance by detecting their knee joint range of motion through normal speed and fast speed sit-to-stand (STS). The elderly subjects were grouped by their age, gender, and body mass index (BMI) to assess the relationship of these three parameters with the extracted features. As a result, the stability, ROM, and gender of elderly subjects while performing fast speed STS had a significant relationship with age and BMI (P © 2023 IEEE.

关键词： Nanocomposites

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Uncover rock-climbing fish's secret of balancing tight adhesion and fast sliding for bioinspired robots

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National Science Review 2023年第8期10卷 222-231页

作者： Wenjun Tan Chuang Zhang Ruiqian Wang Yuanyuan Fu Qin Chen Yongliang Yang Wenxue Wang Mingjun Zhang Ning Xi Lianqing Liu State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Institutes for Robotics and Intelligent Manufacturing Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Histology and Embryology Basic Medical CollegeChina Medical University Chengdu Institute of Biology Chinese Academy of Sciences Department of Biomedical Engineering School of Medicine Tsinghua University Emerging Technologies Institute Department of Industrial and Manufacturing Systems EngineeringUniversity of Hong Kong

The underlying principle of the unique dynamic adaptive adhesion capability of a rock-climbing fish（Beaufortia kweichowensis） that can resist a pull-off force of 1000 times its weight while achieving simultaneous fast sliding(7.83 body lengths per second（BL/S）) remains a mystery in the literature. This adhesion-sliding ability has long been sought for underwater robots. However, strong surface adhesion and fast sliding appear to contradict each other due to the need for high surface contact stress. The skillfully balanced mechanism of the tight surface adhesion and fast sliding of the rock-climbing fish is disclosed in this work. The Stefan force（0.1 mN/mm2） generated by micro-setae on pectoral fins and ventral fins leads to a 70 N/m2adhesion force by conforming the overall body of the fish to a surface to form a sealing chamber. The pull-off force is neutralized simultaneously due to the negative pressure caused by the volumetric change of the chamber. The rock-climbing fish's micro-setae hydrodynamic interaction and sealing suction cup work cohesively to contribute to low friction and high pull-off-force resistance and can therefore slide rapidly while clinging to the surface. Inspired by this unique mechanism, an underwater robot is developed with incorporated structures that mimic the functionality of the rock-climbing fish via a micro-setae array attached to a soft self-adaptive chamber, a setup which demonstrates superiority over conventional structures in terms of balancing tight underwater adhesion and fast sliding.

关键词： bioinspired underwater adhesion crawling robots rock-climbing fish Stefan adhesion underwater robots

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