• Management Science and Financial Engineering
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• 제2권1호
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• pp.103-122
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• 1996

This paper presents an easily used graphical procedure for simultaneous estimation of the index, skewness, scale, and location parameters of the stable laws. First, the index $\alpha$ and skewness $\beta$ are estimated through the joint use of a tail length statistic $\widetilde{K_t}$ and a skewness statistic $\widetilde{K_s}$, both of which are functions of order statistics. Next, the function of order statistics needed for estimation of scale $\sigma$ and location $\mu$ are determined from a nomogram indexed on the estimates of $\alpha$ and $\beta$. Some applications and examples are provided.

• 한국농공학회논문집
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• 제51권2호
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• pp.43-49
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• 2009

Many researcher uses simulation techniques for understanding the phenomenon and expecting the response. Simulation techniques have many advantages which is less time-consuming, easy to control constraints, and cheaper than experimental study. However Researches usually are not good at programming the model, it's hard to implement simulation model using computer language. They use spreadsheet program like Microsoft $excel^{TM}$ Although a spreadsheet program is good for modeling, it's cumbersome to describe expressions which consist of not variable name but location indicator. This study suggests the program which helps researcher developing model using graphical interface and variable name. For verifying usability, the model which is implemented by developed modeler were compared with by spreadsheet program.

• 한국조사연구학회:학술대회논문집
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• 한국조사연구학회 2005년도 추계학술대회 발표논문집
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• pp.159-167
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• 2005

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 1992년도 수공학연구발표회논문집
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• pp.443-447
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• 1992

This study describes the strategy for advanced decision support system (ADSS) development for integrated management of water resources and quality in reservoir systems. The developed ADSS consists of database that contain hydrologic data, observed operational data, and data to support specific reservoir operations simulation, optimization models, and water quality models. The optimization model, mass balance simulation model and water quality models are used in a general prototype ADSS, menu driven controlling framework that assists the user to specify and evaluate the alternative operational scenarios at one time. These alternative scenarios are evaluated by the models and the results are compared through the use of a graphical based display system. This graphical based system uses an icon based schematic representation of the system to organize the presentation of the results. The ADSS includes the ability to use monthly or weekly time periods of analysis for the models and it can use monthly historical or stochastically generated inflows.

• 대한전자공학회논문지SD
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• 제47권5호
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• pp.56-70
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• 2010

현실감 있는 3차원 그래픽 영상을 지원하기 위해서는 3차원의 그래픽 데이터를 기반으로 사실감을 부여하여 2차원 영상을 생성하는 렌더링 기술과 방대한 양의 데이터에 대해 복잡한 연산을 효율적으로 처리할 수 있는 고성능 그래픽 프로세서가 요구된다. 이로 인해 그래픽 하드웨어는 급속히 발전하였고 기존에 실시간 처리가 불가능했던 여러 고급 렌더링 효과들을 가능하게 하고 있다. 과거에 비해 셰이딩 기술이 발전하면서 사실적인 영상의 렌더링이 가능하게 되었으나 아직 많은 계산 시간을 필요로 하고 있다. 실사와 같은 영상을 빠르게 처리하기 위해서 그래픽 프로세서는 많은 데이터에 대해 복잡한 부동소수점 연산을 효율적으로 처리 할 수 있도록 다수의 연산유닛이 집적되는 방향으로 발전하고 있다. 본 논문에서는 프로그램어블 통합 셰이더 프로세서에서 고성능 3차원 컴퓨터 그래픽 영상을 지원하기 위해 특수 함수 유닛을 설계하고 구현하였다. 설계한 특수 함수 유닛에 대해 기능적 레벨의 시뮬레이션을 하여 동작을 검증 하였으며, FPGA Virtex-4(xc4vlx200)에 구현하여 하드웨어 리소스 사용율과 동작속도를 확인 하였다.

• 한국생물정보학회:학술대회논문집
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• 한국생물정보시스템생물학회 2000년도 International Symposium on Bioinformatics
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• pp.59-60
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• 2000

The past few years have seen a dramatic increase in gene expression data on the basis of DNA microarrays or DNA chips. Going beyond a generic view on the genome, microarray data are able to distinguish between gene populations in different tissues of the same organism and in different states of cells belonging to the same tissue. This affords a cell-wide view of the metabolic and regulatory processes under different conditions, building an effective basis for new diagnoses and therapies of diseases. In this talk we present machine learning techniques for effective mining of DNA microarray data. A brief introduction to the research field of machine learning from the computer science and artificial intelligence point of view is followed by a review of recently-developed learning algorithms applied to the analysis of DNA chip gene expression data. Emphasis is put on graphical models, such as Bayesian networks, latent variable models, and generative topographic mapping. Finally, we report on our own results of applying these learning methods to two important problems: the identification of cell cycle-regulated genes and the discovery of cancer classes by gene expression monitoring. The data sets are provided by the competition CAMDA-2000, the Critical Assessment of Techniques for Microarray Data Mining.

• Journal of the Korean Data and Information Science Society
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• 제26권1호
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• pp.141-150
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• 2015

로지스틱회귀에서 모형을 평가하거나 진단할 때 가설검정이 주로 사용되지만 이것만으로는 놓칠 수 있는 부분이 많고 이에 대한 보완을 위하여 그래픽적 방법의 사용이 요구된다. 그래프를 이용한 모형의 적절성 평가를 위한 도구로 잔차산점도가 널리 이용되고 있으나 적용 범위가 선형회귀에 국한되는 문제점이 있다. 해결 방안으로 주변모형산점도를 이용하여 모형의 적절성을 평가하는 방법이 있으나 역시 문제점을 가지고 있다. 본 논문에서는 주변모형산점도의 대안으로 카이잔차산점도를 제안하고 그 효용성을 알아본다.

• 한국측량학회지
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• 제21권3호
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• pp.209-214
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• 2003

지적 분야는 지적도면전산화사업의 일환으로 수치화된 도형정보와 대장정보를 PBLIS에 탑재하여 업무를 수행하고 있고, 이 데이터를 이용해서 현행 측판측량체계를 전자측판측량체계로 전환함으로서 도해지적에서 발생되는 제도오차, 축척오차 및 지적도면의 신축오차 등의 기술적인 오차와 측량을 할 때마다 측량사에 따른 개인오차가 제거됨은 물론 실측도에 대한 정확도를 분석하여 효율적인 측량방법을 제시하는데 그 목적이 있다.

• 대한전기학회논문지
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• 제45권1호
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• pp.100-112
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• 1996

This paper presents a design experience of a control language for coordination of a multi-robot system. To effectively program job commands, a Petrinet-type Graphical Robot Language(PGRL) is proposed, where some functions, such as concurrency and synchronization, for coordination among tasks can be easily programmed.In our system, the proposed task commands of PGRL are implemented by employing formal model languages, which are composed of three modules, sensory, data handling, and action module. It is expected that by using our proposed PGRL and formal languages, one can easily describe a job or task, and hence can effectively operate a complex real-time and concurrent system. The control system is being implemented by using VME-based 32-bit microprocessor boards for supervisory, each module controller(arm, hand, leg, sensor data processing module) and a real time multi-tasking operating system(VxWorks). (author). 17 refs., 16 figs., 2 tabs.

• Journal of information and communication convergence engineering
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• 제3권2호
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• pp.84-89
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• 2005

Goal of this study is to implement 3-dimensional underwater appearance graphical display, fishery measured information display, sonar data representation and display, and 3-dimensional underwater appearance animation based on coefficient data of chaos behavior and fishing modeling of fishing gears from PC cluster system. In order to accomplish the goals of this study, it is essential to compose user interfacing and realistic description of image scenes in the towing-net fishery simulator, and techniques to describe sand cloud effects under water using particle systems are necessary. In this study, we implemented graphical representations and animations of the simulator by using OpenGL together with C routines.