http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
해양플랜트용 500 MPa급 후판강의 모재 및 HAZ의 미세조직과 기계적 특성의 상관관계
박지원,조성규,조영욱,신건철,권용재,이정구,신상용,Park, Jiwon,Cho, Sung Kyu,Cho, Young Wook,Shin, Gunchul,Kwon, Yongjai,Lee, Jung Gu,Shin, Sang Yong 한국재료학회 2020 한국재료학회지 Vol.30 No.3
In this study, two types of thick steel plates are prepared by controlling carbon equivalent and nickel content, and their microstructures are analyzed. Tensile tests, Vickers hardness tests, and Charpy impact tests are conducted to investigate the correlation between microstructure and mechanical properties of the steels. The H steel, which has high carbon equivalent and nickel content, has lower volume fraction of granular bainite (GB) and smaller GB packet size than those of L steel, which has low carbon equivalent and nickel content. However, the volume fraction of secondary phases is higher in the H steel than in the L steel. As a result, the strength of the L steel is higher than that of the H steel, while the Charpy absorbed energy at -40 ℃ is higher than that of the L steel. The heat affected zone (HAZ) simulated H-H specimen has higher volume fraction of acicular ferrite (AF) and lower volume fraction of GB than the HAZ simulated L-H specimen. In addition, the grain size of AF and the packet sizes of GB and BF are smaller in the H-H specimen than in the L-H specimen. For this reason, the Charpy absorbed energy at -20 ℃ is higher for the H-H specimen than for the L-H specimen.
특발성 폐섬유증의 통합의료 협진 모델 개발을 위한 의료진 및 환자 대상 설문조사 연구
박지원,이범준,신정원,진수현,양정민,김수덕,김관일,최혜숙,정희재,Jiwon Park,Beom-Joon Lee,Jeong-Won Shin,Su-Hyun Chin,Jung-Min Yang,Sooduk Kim,Kwan-Il Kim,Hye Sook Choi,Hee-Jae Jung 대한한방내과학회 2023 大韓韓方內科學會誌 Vol.44 No.3
Objective: In this study, a questionnaire survey was conducted for doctors and patients to obtain basic data necessary for the development of an integrated medical system for idiopathic pulmonary fibrosis (IPF). Methods: Questionnaires were developed separately for doctors and patients through an expert group meeting. The survey subjects were recruited online and offline, and finally, responses from 231 doctors and 59 patients were used for statistical analysis. Results: The most important parts in the treatment of IPF for both doctors and patients were the "improvement of respiratory symptoms," "improvement of quality of life," and "prevention of disease progression." Antifibrotic agents were prescribed at a high rate, and 100% of the specialists in Western medicine (WM) and 45.8% of patients reported experiencing side effects. As for the additional payment costs that patients considered as affordable for an integrated medical system, "under 50,000 won (about 38$)" was reported the most in both doctor and patient groups. With regard to the reasons for their reluctance to recommend an integrated medical system for IPF, specialists in WM responded highly to "uncertain evidence for treatment effectiveness." Regarding complementary and alternative medicine therapies that can be beneficial in patients with IPF, "lifestyle management," "diet management," "herb," "relaxation therapy," and "psychotherapy" were ranked high in both doctor and patient groups. Conclusions: In this study, a questionnaire survey on IPF was conducted to review actual treatment status, analyze shortcomings, and identify considerations for the development of an integrated medical system for IPF in the future.
태양광 시스템의 인공신경망 기반 I-V 특성 모델링 향상
박지원,이종환,Park, Jiwon,Lee, Jonghwan 한국반도체디스플레이기술학회 2022 반도체디스플레이기술학회지 Vol.21 No.3
The current-voltage modeling plays an important role in characterizing photovoltaic systems. A solar cell has a nonlinear characteristic with various parameters influenced by the external environments such as the irradiance and the temperature. In order to accurately predict current-voltage characteristics at low irradiance, the artificial neural networks are applied to effectively quantify nonlinear behaviors. In this paper, a multi-layer perceptron scheme that can make accurate predictions is employed to learn complex formulas for large amounts of continuous data. The simulated results of artificial neural networks model show the accuracy improvement by using MATLAB/Simulink.
박지원(Jiwon Park),정하성(Haseong Jung),임동희(Donghui Lim),박주은(Jueun Park),정종진(Jongjin Jung) 한국HCI학회 2024 한국HCI학회 학술대회 Vol.2024 No.1
아이북(AI-Book)은 사용자 설정에 따라 개인화된 동화책을 생성하는 인공지능 기반의 웹 서비스이다. 사용자는 직접 주인공과 주제를 설정함으로써 동화책 생성에 참여하며, 이와 같은 서비스와 사용자의 상호작용을 통해 사용자의 책에 대한 흥미를 높이고 집중력을 향상시키는 것을 목표로 한다. 사용자의 음성을 통해 주제를 설정할 수 있기 때문에, 발음이 부정확한 유아의 음성에 대한 인식률을 높이기 위해 OpenAI 의 Whisper large-v2 모델을 LoRA fine tuning 하였다. 미세조정된 음성 인식 모델(fine-tuned Whisper)과 언어 모델(GPT-4), 이미지 생성 모델(Stable Diffusion)을 활용하여 유아용 전자 동화책을 제작한다. 본 서비스의 사용성을 향상시키기 위해, 유아들을 대상으로 사용성 평가를 수행하였다. 본 사용성 평가 결과를 분석하여 발견한 문제점은 크게 4 가지 측면으로 분류되었으며, 각 문제에 대한 개선 방법이 제시되었다. 이러한 결과는 서비스 업데이트에 필요한 기반 자료로 활용되어 아이북 서비스를 지속적으로 발전시키고, 유아들을 위한 높은 품질의 동화책 서비스로 발전하는 데 기여할 것이다. 향후에는 더 많은 유아를 대상으로 확장된 사용성 평가와 피드백 수집을 진행할 계획이다.
우크라이나 사태 이후 러시아의 에너지 안보 상황과 중앙아시아의 보완적 요인
박지원(Jiwon Park) 한국외국어대학교 동유럽발칸연구소 2024 동유럽발칸연구 Vol.48 No.1
서방의 경제제재로 인해 러시아는 자국의 핵심적인 이익이 관여된 에너지 분야에서 타격을 받게 되었다. 러시아는 중국, 인도 등에 대한 에너지 수출국 다변화와 가격 유지를 통해 자국의 이익을 지키기 위해 노력해오고 있으나 이는 충분한 대안이 되지 못한다. 따라서 러시아로서는 중앙아시아와의 연계를 통해 이 문제를 해결하고자 하며 첫째는 중앙아시아에 대한 에너지 공급을 시작으로, 이 지역을 매개로 하여 파키스탄과 이란 등 남아시아에 대한 에너지 공급을 확장하고자 한다. 이것은 새로운 수요처 발굴의 의도가 강하며 서방에 대한 에너지 수출 감축을 일정 부분 상쇄시켜줄 수 있을 것이다. 둘째는 중앙아시아에 대한 에너지 협력 강화를 통해 향후 EAEU 에너지 및 전기 시장의 통합화 과정에서 자국의 실익과 입장을 더욱 확고히 하고자 한다. 향후 통합될 EAEU 가스 시장에서 카자흐스탄 기업의 참여를 견제하고 EAEU 공동의 에너지 시장에서 독점적 에너지 공급자로서의 지위를 공고히 하고자 한다. Western economic sanctions have hit Russia hard in the energy sector, where its vital interests are at stake. Russia has been trying to protect its interests by diversifying its energy exports to China, India, and other countries and maintaining prices, but this is not a sufficient alternative. Therefore, Russia wants to solve this problem by connecting with Central Asia, starting with energy supplies to Central Asia and expanding energy supplies to South Asia, including Pakistan and Iran, through this region. The intention is to find new sources of demand and to partially offset the reduction of energy exports to the West. Second, it wants to strengthen energy cooperation with Central Asia to better position itself and its interests in the future integration of the EAEU energy and electricity markets. It seeks to curb the participation of Kazakh companies in the future integrated EAEU gas market and consolidate its position as a monopoly energy supplier in the EAEU common energy market.
클락 오프셋 추정 방식을 이용한 TWR WPAN 측위 시스템
박지원(Jiwon Park),임정민(Jeongmin Lim),이규진(Kyujin Lee),성태경(Tae-kyung Sung) 제어로봇시스템학회 2013 제어·로봇·시스템학회 논문지 Vol.19 No.2
Compared to OWR (One-Way Ranging) method that requires precise network time synchronization, TWR (Two-Way Ranging) method has advantages in building an indoor WPAN (Wireless Personal Area Network) location system with lower cost. However, clock offsets of nodes in WPAN system should be eliminated or compensated to improve location accuracy of the TWR method. Because conventional clock offset elimination methods requires multiple TWR transactions to reduce clock offset, they produce network traffic burden instead. This paper presents a clock offset estimation method that can reduce clock offset error with a single TWR transaction. After relative clock offsets of sensor nodes are estimated, clock offsets of mobile tags are estimated using a single TWR communication. Simulation results show that location accuracy of the proposed method is almost similar to the conventional clock offset elimination method, while its network traffic is about a half of the conventional method.