http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박선배 ( Sun-bae Park ),유도식 ( Do-sik Yoo ) 한국항행학회 2021 韓國航行學會論文誌 Vol.25 No.2
객체추적은 객체의 위치변화를 찾는 것으로, 이전시간의 객체의 위치와 주어진 관측 데이터를 바탕으로 객체의 위치를 추적하는 신호처리의 한 분야이다. 객체추적 기법에는 대표적으로 칼만필터와 파티클필터가 있는데, 두 필터 모두 시스템 모델을 알고 있어야 좋은 성능을 낼 수 있다. 퍼셉트론 신경망에 피드백 루프를 추가한 재귀신경망은 데이터의 시계열적 상관관계를 활용할 수 있어 객체 추적에도 사용되고 있으며, 장기의존성 문제를 해결한 LSTM으로 발전하여 다양한 분야에 활용되고 있다. 본 논문에서는 이러한 LSTM의 추적 성능을 검증하기 위하여 1차원 객체 추적이라는 공통의 문제를 설정하고, 칼만필터, 파티클필터와의 추적 성능을 비교한다. 보다 다양한 관측 환경에서의 추적 성능 비교검증을 위하여 가우시안 잡음 외에도 라플라스, 지수, 균등 분포의 잡음이 있는 경우도 상정하였다. 그 결과 LSTM 신경망은 시스템 모델이 주어지지 않고, 학습데이터만으로 학습을 하여 안정적인 성능을 낼 수 있다는 것을 확인하였다. Object tracking is a technique of signal processing that estimates objects locations based on past locations and present time observed data. While, Kalman filter and particle filter are among the most notable object tracking schemes, these filters need to know the system model to achieve optimal performance. The recursive neural network (RNN) with a feedback loop added to the perceptron neural network can be used for object tracking. Also, RNN evolved into long-short term memory (LSTM) that solved the long-term dependence problem and is being used in various fields. In this paper, in order to study the tracking performance of LSTM, we consider a simple problem of one-dimensional object tracking, and compare the tracking performance with Kalman and particle filters. In order to test the tracking performance in diverse observation environments, various noise models such as Gaussian, Laplace, exponential, and uniformly distributed noises are considered. Under the various circumstances, we observe that LSTM neural network achieves fairly stable performance without knowing the system model.
박정선(Jeong-Sun Park),오일석(Il-Seok Oh) 한국정보과학회 2000 한국정보과학회 학술발표논문집 Vol.27 No.2Ⅱ
필기 한글 문자 인식을 위해서는 패턴을 구성하는 획 성분을 분석하는 작업이 필수적이다. 획 성분 추출을 위해 사용한 세선화 방법은 입력 영상을 왜곡하는 단점을 가지고 있다. 이를 극복하기 위하여 본 논문은 입력 영상을 왜곡하지 않고 의미 있는 부품 단위로 분할하는 방법을 제안한다. 의미 있는 부품이란 유사 볼록하게 분할된 영역을 의미한다. 분할 방법은 먼저 입력 영상에 볼록 헐 연산을 적용하여 오목 영역을 생성한다. 이 오목 영역에서 분할 기준(anchor point)점을 탐지하고 획의 반대편 외곽선 상에서 분할 끝(terminal point)점을 찾아 분할 경로를 구성하여 획을 분할한다. 모든 부품이 유사 볼록 조건을 만족할 때까지 위 과정을 반복 수행한다. 제안한 방법은 두 개의 파라미터만을 가지며 간단한 프로시져로 구성되어 있다. 또한 필기 한글 패턴뿐 아니라 여러 언어에 적용 가능하다는 장점을 갖는다.
박선령 ( Park Sun Ryung ) 서울대학교 국제문제연구소 2017 세계정치 Vol.27 No.-
This chapter analyzes the hypocricy of China’s hegemony over Rare Earths. As one of the strategic minerals, Rare Earths are irreplaceable and indispensable materials used in a wide range of industries. China enjoys its hegemony by producing more than 90 percent of the world’s demands. Given that China’s monopoly in the Rare Earths production, the international community has continuously worried about the possibility that China may weaponize its Rare Earths hegemony at any time. During the 2010 Sino-Japanese ter- ritorial disputes over the Senkaku-Diaoyu Island, the concerns of the international community were validated. China imposed an embargo on its Rare Earths exports to Japan, and Japan had no choice but to release the Chinese captain in question. In addition, China’s decision to slash its Rare Earths export quotas intensified international concerns, which led to the international Rare Earths prices skyrocketing by 16 times. These two cases demonstrate China’s Rare Earths hegemony and the vulnerability of the international society. However, this shows that China also reveals its vulnerability in Rare Earths. The majority of existing studies tend to focus on one-time threatening cases and fail to analyze whether China’s hegemony has continued to threaten other countries’ resource security in Rare Earths. To address this gap in research, I investigate two cases. The first reveals that Japanese consequential responses after the embargo also damaged Chinese Rare Earths industry. The second evidences how the chronic smuggling and fragmented industrial structure in Chinese Rare Earths industry have almost nullified the slashed export restrictions. While I do not deny existing arguments on China’s Rare Earths hegemony, I argue that “exclusively producing a resource” does not necessarily translate into having leverage over the resource security of others.
박양호,이병무,박승순,이인용,김영구,박영선 ( Yang Ho Park,Byung Moo Lee,Seung Soon Park,In Yong Lee,Young Koo Kim,Young Sun Park ) 한국환경농학회 1994 한국환경농학회지 Vol.13 No.3
To develop mixed pesticides of herbicide and topdressing fertilizer for paddy rice, twelve mixtures were formulated with combination of urea coated with different level of acrylic acid wax(AAW) and four herbicides, which were thiobencarb, pretilachlor, mefenacet + bensulfuron-methyl and mefenacet + bensulfuron-methyl + dymron, and effects of the mixtures for weed control, phytotoxicity and rice tillering were investigated in the laboratory and the field experiments. Release rates of active ingredient of herbicides in the distilled water were over 90% during 24 hours same as that of the reference herbicides. The release rates of nitrogen showed different patterns according to coated level of granular urea with acrylic acid wax. Optimum release rate of nitrogen as NH₄-N was obtained by 5.5% AAW coating on urea for thiobencarb or pretilachlor mixture, and by 4.0% AAW coating on urea for mefenacet + bensulfuron-methyl or mefenacet + bensulfuron-methyl + dymron mixture. The pesticide active ingredients of the mixtures were stable, which showed 3.7∼8.0% of degradation rate after 90 days of storage under 50℃. Effects on weed control of mixtures were acceptable for both annual and perennial weeds, while ACRI-M9213 mixture showed considerable phytotoxicity at double dose of standard. When treated the mixed pesticides to paddy rice, rice growth status including culm length, ear length, panicle number and polished rice yield exhibited no significant differences compared with the conventional treatment.