• 디지털융복합연구
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• 제11권6호
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• pp.199-204
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• 2013

음성 인식 시스템은 정확하지 않게 입력된 음성으로부터 학습 모델을 구성하고 유사한 음소 모델로 인식하기 때문에 인식률 저하를 가져온다. 따라서 본 논문에서는 바타차랴 알고리즘을 이용한 음성 인식 최적 학습 모델 구성 방법을 제안하였다. 음소가 갖는 특징을 기반으로 학습 데이터의 음소에 HMM 특징 추출 방법을 이용하였으며 유사한 학습 모델은 바타챠랴 알고리즘을 이용하여 정확한 학습 모델로 인식할 수 있도록 하였다. 바타챠랴 알고리즘을 이용하여 최적의 학습 모델을 구성하여 인식 성능을 평가하였다. 본 논문에서 제안한 시스템을 적용한 결과 음성 인식률에서 98.7%의 인식률을 나타내었다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국내학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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• pp.742-748
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• 1993

The dynamics and control of two complex column configurations (sidestream column with stripper; prcfractionater/sidestream column configuration), which are multivariable interacting and nonlinear, have been studied. A new control scheme developed by Hanand Park(1993) to deal with the nonlinear and multivariable nature of distillation processes has been applied to these complex distillation configurations. The control scheme incorporates a nonlinear wave model into a generic model control framework. An observer based on the nonlinear wave model is used to determine the profile positions of distillation column sections. The control scheme enables tight control of the profile position of each column section that leads to fast stabilization of product compositions.

• 대한토목학회논문집
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• 제29권4A호
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• pp.337-346
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• 2009

타정식 현수교의 보강형 가설중의 경계조건과 하중조건의 변화를 고려하여 초기형상을 결정하기 위한 구조해석 모델링 방법 및 해석 알고리즘을 제안하였다. 타정식 현수교의 가설단계를 보강형의 가설시점을 기준으로 보강형 가설단계인 1단계와 완공단계의 2단계로 구분하였으며 이러한 가설단계를 고려하여 초기형상해석 단계를 1차 형상해석과 2차 형상보정해석의 2단계로 구분하였다. 각 해석단계에 대한 보강형의 경계조건과 작용하중의 모델링 방법 및 반복해석 알고리즘을 제안하였으며 실 교량에 대해 수치해석을 수행하여 기존 해석방법에 의한 초기형상해석결과와 비교, 분석하였다. 실 교량에 대한 수치해석 결과 기존 초기형상해석방법의 문제점을 파악할 수 있었으며 본 연구에서 제안된 방법을 적용할 경우 기존 방법의 문제점을 해결할 수 있음을 확인하였다.

• 인터넷정보학회논문지
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• 제8권6호
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• pp.135-144
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• 2007

특성 모델(Feature Model)은 소프트웨어 제품 라인 개발 시 도메인 공학 단계에서 제품들 사이의 공통된 개념들과 서로 다른 개념들을 모델링하는데 널리 사용된다. 특성 모델로부터 특정 제품에 포함될 특성들을 선택한 결과를 특성 구성(Feature Configuration)이라고 하며, 이것은 특정 제품에 대한 요구 사항을 나타낸다. 현재 소프트웨어 제품 라인 개발 시 특성 모델과 특성 구성을 어떻게 구축하고 이용하는지에 대한 연구는 많이 되어 있지만, 이들에 대한 정형적 시맨틱과 논리적 추론에 대한 연구는 부족하다. 본 논문에서는 소프트웨어 제품 라인 공학에서의 표준 문제로 제안된 Graph Product Line을 예제로 하여 규칙 기반 시스템인 JESS를 이용한 특성 구성 검증 기법을 제안한다. 본 논문의 기법은 특성 구성의 불일치성을 일으키는 원인을 명확히 제시하는 장점을 가지며, 자바 언어와의 결합성이 뛰어난 JESS 시스템에 기반을 두었기 때문에 다른 소프트웨어 제품 라인 개발 환경과 쉽게 통합될 수 있다.

• 한국해양공학회지
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• 제32권6호
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• pp.466-473
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• 2018

This paper presents an estimation method for the static configuration of a steel lazy wave riser (SLWR) using the dynamic relaxation method applied to estimate the configuration of structures with strong geometric non-linearity. The lumped mass model is introduced to reflect the flexible structural characteristics of the riser. In the lumped mass model, the tensions, shear forces, buoyancy, self-weights, and seabed reaction forces at nodal points are considered in order to find the static configuration of the SLWR. The dynamic relaxation method using a viscous damping formulation is applied to the static configuration analysis. Fictitious masses are defined at nodal points using the sum of the largest direct stiffness values of nodal points to ensure the numerical stability. Various case studies were performed according to the bending stiffness and size of the buoyancy module using the dynamic relaxation method. OrcaFlex was employed to validate the accuracy of the developed numerical method.

• 한국생산제조학회지
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• 제23권2호
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• pp.138-144
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• 2014

This study investigates the air resistance due to deflector configurations of commonly used largetrucksat a driving speedof 80 km/h. Of the 6 models that are considered, the drag causedby the pressure on the front part of the trailer is largest for model 1. For model 1, the lift caused by the difference between the velocities of the upper and lower streams isgreatest amongall the models. Model 6 has the least resistance against the flow stream consideringthedrags and lifts of theflow models. Anoptimal design can be obtainedby investigating thesimulation analysis ofvarious deflector configurationsfor the upper part of largetrucks; this optimum deflector configuration will help reduce the air resistanceon large trucks.

• Journal of Information Technology Applications and Management
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• 제14권2호
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• pp.11-26
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• 2007

In this paper we suggest a context-driven configuration model of virtual businesses to form a business network model consisting of role-based, interaction-centered business partners. The model makes use of the subcontext concept which explicitly represents actors and interactions in virtual business (VB) context. We separate actors who have capacities on tasks in a specific kind of role and actor subcontext which models requirements in specific interaction subcontext. Three kinds of actors are defined in virtual service chains, service user, service provider, and external service supporter. Interaction subcontext models a service exchange process between two actor subcontexts with consideration of context dependencies like task and quality dependencies. Each subcontext may be modeled in the form of a situation network which consists of a finite set of situation nodes and transitions. A specific situation is given in a corresponding context network of actors and interactions. It is illustrated with a simple example.

• KIEE International Transactions on Electrophysics and Applications
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• 제4C권5호
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• pp.220-229
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• 2004

We have examined a technique of one-dimensional (1D) fluid modeling for radio-frequency Ar capacitively coupled plasmas (CCP) between unequal-sized powered and grounded electrodes. In order to simulate a practical CCP reactor configuration with a grounded side wall by the 1D model, it has been assumed that the discharge space has a conic frustum shape; the grounded electrode is larger than the powered one and the discharge space expands with the distance from the powered electrode. In this paper, we focus on how much a 1D model can approximate a 2D model and evaluate their comparisons. The plasma density calculated by the 1D model has been compared with that by a two-dimensional (2D) fluid model, and a qualitative agreement between them has been obtained. In addition, 1D and 2D calculation results for another reactor configuration with equal-sized electrodes have also been presented together for comparison. In the discussion, four CCP models, which are 1D and 2D models with symmetric and asymmetric geometries, are compared with each other and the DC self-bias voltage has been focused on as a characteristic property that reflects the unequal electrode surface areas. Reactor configuration and experimental parameters, which the self-bias depends on, have been investigated to develop the ID modeling for reactor geometry with unequal-sized electrodes.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2009년도 추계학술발표대회 논문집
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• pp.142-147
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• 2009

In order to achieve performance assessment and optimal control of a double-skin system, an accurate simulation model is required. In the previous study, a lumped simulation model of such system was developed. As a follow-up of the previous research, the first objective of this paper is to investigate how the mathematical model should be calibrated according to system configuration(cavity width, depth, height, airflow pattern, local environment, etc.). And the second objective of this study is to discuss the effect of local weather information. In conclusion, this paper describes that the model should be recalibrated according to configuration. And it is necessary to have local weather information for accurate prediction and optimal control of the system.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권10호
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• pp.3419-3437
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• 2022

Anonymization technology is an important technology for privacy protection in the process of data release. Usually, before publishing data, the data publisher needs to use anonymization technology to anonymize the original data, and then publish the anonymized data. However, for data publishers who do not have or have less anonymized technical knowledge background, how to configure appropriate parameters for data with different characteristics has become a more difficult problem. In response to this problem, this paper adds a historical configuration scheme resource pool on the basis of the traditional anonymization process, and configuration parameters can be automatically recommended through the historical configuration scheme resource pool. On this basis, a privacy model hybrid recommendation algorithm for user satisfaction is formed. The algorithm includes a forward recommendation process and a reverse recommendation process, which can respectively perform data anonymization processing for users with different anonymization technical knowledge backgrounds. The privacy model hybrid recommendation algorithm for user satisfaction described in this paper is suitable for a wider population, providing a simpler, more efficient and automated solution for data anonymization, reducing data processing time and improving the quality of anonymized data, which enhances data protection capabilities.