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Towards Training an Agent in Augmented Reality World with Reinforcement Learning
Veera Venkata Ram Murali Krish,Naresh Adhikari,Amrita D. Ghimire 제어로봇시스템학회 2017 제어로봇시스템학회 국제학술대회 논문집 Vol.2017 No.10
Reinforcement learning (RL) helps an agent to learn an optimal path within a specific environment while maximizing its performance. Reinforcement learning (RL) plays a crucial role on training an agent to accomplish a specific job in an environment. To train an agent an optimal policy, the robot must go through intensive training which is not cost-effective in the real-world. A cost-effective solution is required for training an agent by using a virtual environment so that the agent learns an optimal policy, which can be used in virtual as well as real environment for reaching the goal state. In this paper, a new method is purposed to train a physical robot to evade mix of physical and virtual obstacles to reach a desired goal state using optimal policy obtained by training the robot in an augmented reality (AR) world with one of the active reinforcement learning (RL) techniques, known as Q-learning.
Veera Thanyaphirak,Vijit Kinnares,Anantawat Kunakorn 대한전기학회 2017 Journal of Electrical Engineering & Technology Vol.12 No.3
This paper presents the comparison of starting current characteristics of a three-phase induction motor fed by two types of soft starters. The first soft starter under investigation is a conventional AC voltage controller on the basis of a phase-control technique. The other is the proposed asynchronous PWM AC chopper which is developed from the conventional synchronous PWM AC chopper. In this paper, the proposed asynchronous PWM AC chopper control scheme is developed by generating only two asynchronous PWM signals for a three-phase main power circuit (6 switching devices) from a single voltage control signal which is compared with a single sawtooth carrier signal. By this approach, the PWM signals are independent and easy to implement since the PWM signals do not need to be synchronized with a three-phase voltage source. Details of both soft starters are discussed. The experimental and simulation results of the starting currents are shown. It is found that the asynchronous PWM AC chopper efficiently works as a suitable soft starter for the threephase induction motor due to that the starting currents are reduced and are sinusoidal with less harmonic contents, when being compared with the starting current waveforms using the conventional phase-control starting technique. Also the proposed soft starter offers low starting electromagnetic torque pulsation.
Veera Murugan Arivunithi,박호열,Saripally Sudhaker Reddy,도영주,박형진,신은솔,노용영,송명관,진성호 한국고분자학회 2021 Macromolecular Research Vol.29 No.2
Although perovskite solar cells (PSCs) have achieved high power conversion efficiency (PCE) by utilizing 2,2',7,7'-tetrakis(N,N'-di-p-methoxyphenylamine)- 9,9'-Spirobifluorene (Spiro-OMeTAD) as hole transporting material (HTM), the reproducibility and stability of PSCs are still a pressing concern. Herein, we introduced a solvent processed organic-organic bilayer based on 2-(4-(7-(9,9-dimethylacridin-10(9H)- yl)-9,9-diethyl-9H-fluoren-2-yl)phenyl)-1-phenyl-1H-phenanthro[9,10-d]imidazole (AFpPPI) and Spiro-OMeTAD in layer to layer as HTM in PSCs. The devices configured with AFpPPI/Spiro-OMeTAD bilayer achieved a maximum PCE of 19.9% in mesoporous-TiO2 (mp-TiO2) structure with perovskite absorber of Cs0.05Rb0.05(FAPbI3)0.76 (MAPbBr3)0.14. The properties of the bilayer structure were analyzed with steadystate photoluminescence, ultra-violet photoelectron and impedance spectroscopy. The AFpPPI/Spiro-OMeTAD improved open-circuit voltage (VOC) by lowering the quasi-Fermi energy level for holes and reducing the charge recombination, resulting in high VOC (1.14 V in the champion cell) and high fill factor (FF) that lead to high PCE. The addition of AFpPPI layer improves the quality of Spiro-OMeTAD and provides pinhole-free film. Moreover, the stability is improved in controlled temperature and humid conditions. This work affords a new approach for commercial applications of PSCs with better stability.
Veera Pandiyan Kaliani Sundram,Prem Chhetri,Atika Shamsul Bahrin 인하대학교 정석물류통상연구원 2020 JOURNAL OF INTERNATIONAL LOGISTICS AND TRADE Vol.18 No.1
This paper presents the concerns in manufacturing supply chain. Further this study investigates the role of information technology (IT) and information sharing (IS) in manufacturing supply chain and determines its impact towards supply chain integration (SCI), supply chain performance (SCP), and manufacturing firm performance (FP) in Malaysia. The theoretical framework was proposed for the study on the basis of existing literature. The study administered a survey questionnaire to collect data from manufacturing firms in Malaysia with 112 respondents. A multiple regression analysis is conducted to establish the relationship between IT, IS, SCI, and FP. The study finds that IT and sharing has significant positive effect towards and performance. Firms that use IT and practice IS across partners in the supply chain are more likely to integrate their internal and external value chain for better performance both within and across the manufacturing firms in the supply chain. This study can be of interest to the manufacturing industry as well as other industry practitioners interested in improving the performance of the organization and supply chain in total. For supply chain practitioners, this results indicate that the firms should adopt IT and IS practices to strategically improve SCI. This in turn will also improve the supply chain network and firm’s performance. This study employs a newly developed framework which depicts the causal relationship between IT, IS, SCI, Supply Chain Performance, and FP in Malaysia. Furthermore, it closes a gap in existing literature by examining the effect IT and communication (ICT) practices toward manufacturing firms’ performance and SCP in a single setting. In addition, the current study attempted to construct a model which would estimate and interpret SCP and FP simultaneously, and to evaluate this model in an empirical fashion.
Thanyaphirak, Veera,Kinnares, Vijit,Kunakorn, Anantawat The Korean Institute of Electrical Engineers 2017 Journal of Electrical Engineering & Technology Vol.12 No.3
This paper presents the comparison of starting current characteristics of a three-phase induction motor fed by two types of soft starters. The first soft starter under investigation is a conventional AC voltage controller on the basis of a phase-control technique. The other is the proposed asynchronous PWM AC chopper which is developed from the conventional synchronous PWM AC chopper. In this paper, the proposed asynchronous PWM AC chopper control scheme is developed by generating only two asynchronous PWM signals for a three-phase main power circuit (6 switching devices) from a single voltage control signal which is compared with a single sawtooth carrier signal. By this approach, the PWM signals are independent and easy to implement since the PWM signals do not need to be synchronized with a three-phase voltage source. Details of both soft starters are discussed. The experimental and simulation results of the starting currents are shown. It is found that the asynchronous PWM AC chopper efficiently works as a suitable soft starter for the three-phase induction motor due to that the starting currents are reduced and are sinusoidal with less harmonic contents, when being compared with the starting current waveforms using the conventional phase-control starting technique. Also the proposed soft starter offers low starting electromagnetic torque pulsation.
INDHANA VEERA SANKAR,전재호,장성규,조정호,황의헌,이성주 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.15 No.01
A comprehensive review of the fabrication process, fundamental properties and functionalities and device applications of heterogeneously integrated two-dimensional (2D) materials is provided. An extensive library of atomic 2D materials with selectable material properties exists and it is rapidly expanding, with which it is possible to construct hybrid or heterostructures that display novel properties with unique functionalities. Such heterostructures adding a degree of freedom to carriers in the third direction provide interesting possibilities for the design of functional novel devices. The subject of 2D heterostructures has now become so vast that no single article can cover the entire topic in any reasonable manner. This review is intended to bridge the gap between the major developments already discovered and current trends in 2D heterostructures.
Koppineedi Veera Satish,Jonnakuti Prakasa Rao 국립중앙과학관 2017 Journal of Asia-Pacific Biodiversity Vol.10 No.4
On the page 104 ‘Materials and methods’ the following sentence is incorrect: “Field and voucher numbers were assigned and realtime observations on habitat and taxonomic notes were recorded for specimens and deposited in Andhra University Herbarium (AUH), Andhra Pradesh, India.” The correct version is: “Field and voucher numbers were assigned and realtime observations on habitat and taxonomic notes were recorded for specimens, holotype deposited in Andhra University Herbarium (AUH) and isotypes in the centers of Botanical Survey of India viz. Central National Herbarium (CAL), Deccan Regional Centre (DRC), Madras Herbarium (MH) and Arid Zone Circle (BSJO). On page 107 ‘Results and discussion’of the article, the following sentence was incorrect: “Type. India. Andhra Pradesh, Visakhapatnam, Araku Valley, Galikonda hilltop, 500 m away from Galikonda viewpoint, 1245m alt, 18ˈ16 ˈ28.1ˈˈ N, 82ˈ59ˈ20.5ˈˈ E, 07 Dec 2013, K.V. Satish, J. Prakasa Rao 21202 (CAL, Holotype.; AUH, DRC, MH, BSJO, Isotypes). The correct version is: Type. Holotype: India. Andhra Pradesh, Visakhapatnam, Araku Valley, Galikonda hilltop, 500 m away from Galikonda viewpoint, 1245 m alt, 18ˈ16ˈ28.1ˈˈ N, 8259ˈ20.5ˈˈ E, 07 Dec 2013, K.V. Satish, J. Prakasa Rao 21202 (AUH). Isotypes: 21202 a (CAL); 21202 b (DRC); 21202 c (MH); 21202 d (BSJO). On the page 104 ‘Materials and methods’ the following sentence is incorrect: “Field and voucher numbers were assigned and realtime observations on habitat and taxonomic notes were recorded for specimens and deposited in Andhra University Herbarium (AUH), Andhra Pradesh, India.” The correct version is: “Field and voucher numbers were assigned and realtime observations on habitat and taxonomic notes were recorded for specimens, holotype deposited in Andhra University Herbarium (AUH) and isotypes in the centers of Botanical Survey of India viz. Central National Herbarium (CAL), Deccan Regional Centre (DRC), Madras Herbarium (MH) and Arid Zone Circle (BSJO). On page 107 ‘Results and discussion’of the article, the following sentence was incorrect: “Type. India. Andhra Pradesh, Visakhapatnam, Araku Valley, Galikonda hilltop, 500 m away from Galikonda viewpoint, 1245m alt, 18ˈ16 ˈ28.1ˈˈ N, 82ˈ59ˈ20.5ˈˈ E, 07 Dec 2013, K.V. Satish, J. Prakasa Rao 21202 (CAL, Holotype.; AUH, DRC, MH, BSJO, Isotypes). The correct version is: Type. Holotype: India. Andhra Pradesh, Visakhapatnam, Araku Valley, Galikonda hilltop, 500 m away from Galikonda viewpoint, 1245 m alt, 18ˈ16ˈ28.1ˈˈ N, 82ˈ59ˈ20.5ˈˈ E, 07 Dec 2013, K.V. Satish, J. Prakasa Rao 21202 (AUH). Isotypes: 21202 a (CAL); 21202 b (DRC); 21202 c (MH); 21202 d (BSJO).