• KEPCO Journal on Electric Power and Energy
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• 제4권2호
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• pp.81-88
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• 2018

발전소의 성능을 효율적으로 관리 및 유지하기 위한 발전소 성능평가는 매우 중요한 절차이다. 하지만 기존의 성능평가 방식은 엑셀 기반의 수작업 방식이다 보니 준비절차가 복잡하고, 범용성이 떨어지는 문제가 있었다. 이에 본 논문에서는 기존 성능평가 시스템의 문제점을 분석하고, 설비를 효과적으로 모델링하고 누락된 물성치를 계산하며, 이를 바탕으로 자동 지표계산을 수행하는 설비 모델러를 통해 성능평가의 범용성, 효율성 및 정확성을 높이는 방법을 기술하고자 한다.

• 한국수학교육학회지시리즈A:수학교육
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• 제61권4호
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• pp.581-595
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• 2022

본 연구의 목적은 수학 교과에서 자동문항생성을 활용하여 지식의 핵심 구조인 온톨로지모형 기반의 문항모형을 CAFA 시스템을 통해 제작하는 절차를 명세하고, 생성된 문항 사례들을 탐색하는 데 있다. 이를 위한 사례로 수학 3의 대푯값과 산포도 단원의 평가준거 성취기준을 바탕으로 개념과 계산을 포함한 내용적 특성과 적용을 포함한 과정적 특성을 바탕으로 형성평가에 적합한 문항모형을 제작하였다. 하나의 문항모형에서 생성된 문항 유형은 최선답형, 정답형, 합답형, 미완성문장형, 부정형, 진위형, 배합형 등이었으며, 매체로는 Google Chart, HTML, TTS, 그림, 비디오 등을 활용할 수 있는 것으로 나타났다. 이를 바탕으로 자동문항생성 기반의 디지털 평가 활용방안에 대한 시사점을 학생, 예비교사, 일반교사 그리고 특수교육 측면에서 논의하고, 본 연구의 한계점과 향후 연구방향을 제시하였다.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2003년도 ISIS 2003
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• pp.702-705
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• 2003

Directed graph and Lindenmayer system (L-system) are two major encoding methods of representation to develop creatures in an application field of artificial life. It is difficult to structurally define real morphology using the L-systems which are a grammatical rewriting system because they represent genotype as loops, procedure calls, variables, and parameters. This paper defines a class of representations called structured directed graph and interactive genetic algorithm for automatically creating 3D flower morphology. The experimental results show that natural flower morphology can be created by the proposed method.

• ETRI Journal
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• 제32권5호
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• pp.810-818
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• 2010

This paper presents a new framework for integrating untranscribed spoken content into the acoustic training of an automatic speech recognition system. Untranscribed spoken content plays a very important role for under-resourced languages because the production of manually transcribed speech databases still represents a very expensive and time-consuming task. We proposed two new methods as part of the training framework. The first method focuses on combining initial acoustic models using a data-driven metric. The second method proposes an improved acoustic training procedure based on unsupervised transcriptions, in which word endings were modified by broad phonetic classes. The training framework was applied to baseline acoustic models using untranscribed spoken content from parliamentary debates. We include three types of acoustic models in the evaluation: baseline, reference content, and framework content models. The best overall result of 18.02% word error rate was achieved with the third type. This result demonstrates statistically significant improvement over the baseline and reference acoustic models.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 A
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• pp.149-151
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• 1997

Korea Water Resources Corporation (KOWACO) has used hard wired sequential control system for dams and SCADA / DCS for water supply offices. The control system, which consists of automatic control, communication and computer science, has to look for the security of operation and the quality of generated power and treated water. In this paper, we would like to propose the systematic evaluation of technical proposals such as purpose, method/procedure, evaluation criteria and report preparation.

• 대한조선학회논문집
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• 제56권3호
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• pp.187-199
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• 2019

In the case of gas carriers and oil tankers, pipes are installed on the upper deck as a moving passage to load LPG, LNG, crude oil, etc. Pipes used for loading or unloading liquid cargo in cargo holds are connected to the hull through support structures. However, many cases of hull damage have been reported where the various equipment and support structures are installed on the upper deck. It is assumed that not only the structural discontinuity where the hull and the pipe support structure meet, but also action due to the pipe loads and the hull girder bending moment are simultaneously affected. This paper deals with the design and strength evaluation of the support structure of pipes and cables installed on the upper deck of commercial ships and offshore structures. For these supporting structures, design conditions and working loads were defined. The design procedure was established through the structure analysis on the method of determining the member dimensions. A series of finite element analysis was performed on the factors to be considered in the design and the effects were discussed. The accuracy and design periods of the strength evaluation was improved and reduced by application of the automation program in the finite element analysis. It is also expected that the design reliability of the shipyard is improved.

• 한국측량학회지
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• 제32권3호
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• pp.205-216
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• 2014

Multi-camera systems have been widely used as cost-effective tools for the collection of geospatial data for various applications. In order to fully achieve the potential accuracy of these systems for object space reconstruction, careful system calibration should be carried out prior to data collection. Since the structural integrity of the involved cameras' components and system mounting parameters cannot be guaranteed over time, multi-camera system should be frequently calibrated to confirm the stability of the estimated parameters. Therefore, automated techniques are needed to facilitate and speed up the system calibration procedure. The automation of the multi-camera system calibration approach, which was proposed in the first part of this paper, is contingent on the automated detection, localization, and identification of the object space signalized targets in the images. In this paper, the automation of the proposed camera calibration procedure through automatic target extraction and labelling approaches will be presented. The introduced automated system calibration procedure is then implemented for a newly-developed multi-camera system while considering the optimum configuration for the data collection. Experimental results from the implemented system calibration procedure are finally presented to verify the feasibility the proposed automated procedure. Qualitative and quantitative evaluation of the estimated system calibration parameters from two-calibration sessions is also presented to confirm the stability of the cameras' interior orientation and system mounting parameters.

• 정보관리학회지
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• 제24권4호
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• pp.305-321
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• 2007

이 연구는 색인가가 주제 색인하는 과정에서 참조하는 여러 문서구성요소를 문서 범주화의 정보원으로 인식하여 이들이 문서 범주화 성능에 미치는 영향을 살펴보는데 그 목적이 있다. 이는 기존의 문서 범주화 연구가 전문(full text)에 치중하는 것과는 달리 문서구성요소로서 정보원의 영향을 평가하여 문서 범주화에 효율적으로 사용될 수 있는지를 파악하고자 한다. 전형적인 과학기술분야의 저널 및 회의록 논문을 데이터 집합으로 하였을때 정보원은 본문정보 중심과 문서구성요소중심으로 나뉘어 질 수 있다. 본문정보중심은 본론자체와 서론과 결론으로 구성되며, 문서구성요소중심은 제목, 인용, 출처, 초록, 키워드로 파악된다. 실험결과를 살펴보면, 인용, 출처, 제목정보원은 본문정보원과 비교하여 유의한 차이를 보이지 않으며, 키워드정보원은 본문 정보원과 비교하여 유의한 차이를 보인다. 이러한 결과는 색인가가 참고하는 문서구성요소로서의 정보원이 문서 범주화에 본문을 대신하여 효율적으로 활용될 수 있음을 보여주고 있다.

• Archives of Plastic Surgery
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• 제42권3호
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• pp.282-287
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• 2015

Background Morphological changes that accompany aging, such as wrinkles and skin laxity, are particularly prominent on facial skin. Recently, facial rejuvenation using the hydrofilling effect of hyaluronic acid (HA) filler has been employed for improvement of skin texture. In this study, we studied rejuvenating effects of stabilized HA (Restylane Vital) through direct intradermal injections. Methods A total of 30 female patients underwent a series of procedures on face, including three sessions at intervals of four weeks. A total of 2 mL of Restylane Vital was injected along the whole face using an automatic injector. Improvement of skin surface roughness, elasticity, brightness, moisture, and fine wrinkles was evaluated. Patient satisfaction was evaluated, and pictures of patients were taken at each visit and 6 months after last treatment session. Scoring for each patient was performed by three doctors according in five subjects. Moisture, oil and elasticity were measured before the procedure and before the last treatment in 10 patients. Results The majority of patients (77%) were satisfied with the therapeutic outcomes. Approximately 66% of patients responded that the effects of this procedure persisted for longer than four months, and the majority of patients (77%) wanted to undergo this procedure again and would recommend this procedure to acquaintances. Regarding doctors' evaluation, scores for improvement of skin surface roughness, elasticity, and brightness were significantly higher than those for improvement of moisture and fine wrinkle. Conclusions Intradermal injection of HA can have a rejuvenating effect on dry and tired facial skin, especially in improvement of skin surface roughness.

• 산업공학
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• 제15권4호
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• pp.452-459
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• 2002

The volume of B2C products rapidly increases according to the activation of the electronic commerce. Small and medium electronic commerce companies request the establishment of Parcel Warehouse &Distribution Center(PWDC) that is invested by the post office. This paper presents an economic evaluation method for PWDC from the perspectives fo PWDC and the post office. Two types of warehouses are considered as alternatives for PWDC. One is the conventional warehouse, and the other is the automamic warehouse that is characterized by AS/RS and automatic dispenser system. A benefit/cost analysis method is used to evaluate PWDC since it has the property of public enterprise. A PWDC which will be located in Seoul and adjacent to a concentrated post office is selected as a case study to illustrate the procedure of economic analysis.