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황혜린,정재경,홍세실,송기은,홍선희,심상인 한국잔디학회 2022 Weed & Turfgrass Science Vol.11 No.3
This study was conducted to investigate the effect of competition with various weed densities on crop plants in soybean fields. As the density of weed decreased, the biomass production of soybeans increased, and the soybean yield was also high in plots with low weed occurrence density. The weed species that were dominant in the field were Cyperus iria, Eclipta prostrata, Portulaca oleracea , Mollugo pentaphylla , Galinsoga parviflora , Acalypha australis , and Amaranthus retroflexus. The diversity of weeds was lower in the plot in which weed density was lowered. The hyperspectral reflectance by weed density was different not only in soybean but also in weeds and was affected by the time of the investigation. At 21 days after flowering (DAF) at which water requirement is high in soybean, the hyperspectral reflection was lower than that of weeds, and at 42 DAF, the hyperspectral reflection of weeds was lower than that of soybeans. The carotenoid indicators (CI), known to be related to water stress in plants, was higher than that of weeds at 21 DAF, and at the higher weed density, weeds are higher than soybeans, and it is estimated that the more weeds occur, the more weeds are superior to soybeans in competition for water. When comparing the pigment specific simple ratio (carotenoids) (PSSRc) related to carotenoid level by the weed densities, the index of soybean at the low weed density and medium density decreased at 42 DAF compared to the value at 21 DAF. 본 연구는 콩 밭에서 잡초발생밀도에 의한 잡초 경합이 콩 작물에 미치는 영향을 조사하였다. 잡초발생밀도가 낮아짐에 따라 콩의 건물중은 높아졌으며, 콩 수확량도 잡초발생밀도가 낮은 처리구에서 높았다. 잡초발생밀도에 따른 잡초종및 건물중을 조사한 결과, 주요 발생 잡초종들은 쇠비름, 참방동사니, 한련초, 석류풀, 별꽃아재비, 깨풀, 털비름이었고, 잡초발생저밀도구보다 고밀도구에서 잡초종이 다양하였다. 잡초종 건물중은 개화 후 21일차보다 42일차 조사에서 줄어들었으나 깨풀과 한련초는 증가하였다. 잡초발생밀도에 의한 초분광 반사율은 콩과 잡초, 조사 시기에 영향을 받았다. 특히 작물의 생육단계에 따라 반사율의 변화가 일어났다. 수분요구도가 높은 개화 후 21일에는 콩의 반사율이 잡초의반사율보다 낮았으나 개화 후 42일에는 잡초 반사율이 콩 반사율보다 낮았다. 식물 수분스트레스와 관련 있다고 알려진CI은 콩이 잡초보다 높았기 때문에 수분 경쟁에 있어 콩이 잡초보다 우위에 있는 것으로 보인다. 카로티노이드와 관련된 PSSRc은 잡초발생 고밀도구의 콩에서 감소폭이 잡초 감소폭보다 높은 것으로 보아 콩과 잡초간 수분 경합이 일어나는 조건에서 발생하는 산화적 스트레스에 대한 대응을 위해 카로티노이드가 중요한 역할을 하는 것으로 보인다.
황혜린,문경아 한국예술심리치료학회 2022 예술심리치료연구 Vol.18 No.1
The purpose of this study is to investigate art therapists’ response art experiences in clinical practice. To this end, the researcher conducted interviews with eight art therapists. Interview data were analyzed through a consensual qualitative research method. As a result, five domains― “motivation of response art,” “self-care through response art,” “interaction through response art,” “Practical difficulties in response art,” and “improvement in the therapist’s expertise through response art”―and 17 associated categories were derived. This means that art therapists used response art as a means of communicating with clients at clinical practice and they also chose response art as a way to take care of themselves as therapist after the session. Although there were practical difficulties in implementing the response art, it was found that the art therapist felt the need for the response art to function as an expert and was implementing it. The significance of this study lies in emphasizing the value and importance of response art by examining the types of experiences art therapists have through the implementation of response art in clinical practice, which shows the unique identity of individual art therapists. 이 연구의 목적은 임상 현장에서 활동하고 있는 미술치료사의 반응작업 경험에 대해 고찰하는 것이다. 이를 위해 연구자는 미술치료사로 활동하고 있는 8인을 대상으로 반 구조화된 질문지를 사용하여 면담을 실시하였다. 면담 자료는 합의적 질적 연구 방법으로 분석하여 결과를도출하였다. 분석 결과 ‘반응작업의 동기’, ‘반응작업을 통한 자기돌봄’, ‘반응작업을 통한 상호작용’, ‘반응작업 실행에서의 현실적 어려움’, ‘반응작업을 통한 치료사의 전문성 향상’으로 총 5 개의 영역과 17개의 범주가 도출되었다. 이는 미술치료사가 임상현장에서 내담자와 소통하는수단의 일환으로 반응작업을 활용하였고 치료 회기 이후 치료사인 자신을 돌보는 방법으로 반응작업을 선택하였다는 것을 의미한다. 반응작업을 실행하는데 현실적인 어려움도 있었으나 미술치료사는 전문가로 기능하기 위해 반응작업의 필요성을 느끼고 실행하고 있는 것으로 나타났다. 이 연구는 미술치료사의 고유한 정체성이 담긴 반응작업에서 미술치료사가 어떠한 경험을 하는지에 대해 고찰함으로써 반응작업이 가지는 가치와 중요성을 강조하는 데 의의가 있다.
Implementation of a Fault Diagnosis System Using Neural Networks for Solar Panel
황혜린,김범수,조태현,이인수 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.4
In this paper, we propose a fault diagnosis system for the solar panels of solar-powered street lightsthat uses an adaptive resonance theory 2 neural network (ART2 NN) and a multilayer neural network (MNN). Todiagnose a fault in a solar panel, we use the open-circuit voltage with respect to the duty cycle as input for the twoneural networks. As a result, we can use them to double check the fault diagnosis for the solar panel. In addition,we present a graphical user interface for the proposed solar panel fault diagnosis system. The fault diagnosis systemwe propose has the potential for application in similar systems and devices.
희소 입력 환경에서의 지식 증류를 활용한 카메라-라이다 센서 융합
황혜린,조동현 한국방송∙미디어공학회 2023 방송공학회논문지 Vol.28 No.4
Recently, as autonomous driving technology has been applied to various fields, technology development related to autonomous vehicles has received a lot of attention. The object detection technology of autonomous vehicles is a technology for improving the safety and performance of autonomous vehicles, and many studies have been conducted. Among the major recognition sensors, camera, radar, and LiDAR, single sensor research using cameras is common, but multi-camera technology using only cameras has limitations in improving performance. Sensor fusion technologies using multi modal information are being studied as a way to overcome the limitations of a single sensor, but there is a performance difference according to input information. Therefore, this paper proposes a knowledge distillation technique for sensor fusion that can improve performance even when sparse input information is received. The proposed method transfers the knowledge of the teacher model to the student model received with relatively sparse input. As a result of the final experiment, we verify the 3D object detection performance based on camera-LiDAR sensor fusion, which operates strongly even with sparse input information.