• 정보처리학회논문지:컴퓨터 및 통신 시스템
• /
• 제11권5호
• /
• pp.133-138
• /
• 2022

최근 고성능컴퓨팅, 인공지능 분야에서 GPU 장치 사용이 일반화되고 있지만, GPU 프로그래밍은 여전히 어렵게 여겨진다. 특히 호스트(host) 메모리와 GPU 메모리를 별도로 관리하기 때문에 성능과 편의성 방면에서 연구가 활발히 진행되고 있다. 이에 따라 여려가지 CPU-GPU 메모리 전송 방법들이 연구되고 있다. 한편 CPU와 GPU 및 통합메모리(Unified memory) 등 하나의 실리콘 패키지로 묶는 SoC(System on a Chip) 제품들이 최근에 많이 출시되고 있다. 본 연구는 이러한 통합메모리 장치에서 CPU, GPU 장치간 데이터를 사용하고 전송시 성능관련 비교를 하고자 한다. 기존 CPU내 호스트 메모리와 GPU 메모리가 분리된 환경과는 다른 특징을 보여준다. 여기서는 통합메모리 장치인 NVIDIA SoC칩들과 NVIDIA SMX 기반 V100 GPU 카드에서 CPU-GPU 간 데이터 전송 프로그래밍 기법별로 성능비교를 한다. 성능비교를 위해 워크로드는 HPC 분야의 수치계산에서 자주 사용하는 2차원 행렬 전치 커널이다. 실험을 통해 CPU-GPU 메모리 전송 프로그래밍 방법별 GPU 커널 성능차이, 페이지 잠긴 메모리와 페이지 가능 메모리를 사용했을 경우 전송 성능차이, 전체(Overall) 성능비교, 마지막으로 워크로드 크기별 성능비교를 하였다. 이를 통해 통합메모리칩인 NVIDIA Xavier에서 I/O 캐시일관성 지원을 통해 SoC 칩내 통합메모리에 대한 이점을 극대화 할 수 있음을 확인할 수 있었다.

• ETRI Journal
• /
• 제22권4호
• /
• pp.13-24
• /
• 2000

As more transistors are integrated onto bigger die, an on-chip multiprocessor will become a promising alternative to the superscalar microprocessor that dominates today's microprocessor marketplace. This paper describes key parts of a new on-chip multiprocessor, called Raptor, which is composed of four 2-way superscalar processor cores and one graphic co-processor. To obtain performance characteristics of Raptor, a program-driven simulator and its programming environment were developed. The simulation results showed that Raptor can exploit thread level parallelism effectively and offer a promising architecture for future on-chip multi-processor designs.

• 한국자동차공학회논문집
• /
• 제11권6호
• /
• pp.118-126
• /
• 2003

Digital Manufacturing is a technology facilitating effective developments and agile productions of the product via digital computer models representing physical and logical schema and the behavior of the real manufacturing systems including manufacturing resources, environments and products. For the successful application of this technology, a digital factory as a well-designed and an integrated environment is essential. In this paper, we constructed the sophisticated digital factory of a Korean automotive company's body shop, and conducted precise simulations of unit cell, lines and the whole factory for the collision check, the production flow analysis and the off-line programming. We expect that this digital factory of the body shop helps us achieve great savings in time and cost for many manufacturing preparation activities of the new car development.

• 산업공학
• /
• 제15권4호
• /
• pp.356-363
• /
• 2002

Virtual Manufacturing is a technology to facilitate effective product development and agile production by computer models representing the physical and logical schema and the behavior of real manufacturing systems including manufacturing resources, environments and products. For the successful application of this technology, a virtual factory as a well-designed and integrated environment is essential. In this research, we constructed a sophisticated virtual factory model of an automotive company's paint shop, and performed precise simulations of unit cells, lines and whole plant operations for collision check and off-line programming. It is expected that this virtual paint shop is useful for achieving time and cost savings in many manufacturing preparation and planning activities of new car development processes.

• 한국경영과학회지
• /
• 제15권2호
• /
• pp.85-95
• /
• 1990

Structured modeling provides a formal mathematical framework, language, and computer-based environment for conceiving, representing, and manipulating a wide variety of model. It provides a natural framework for integrated modeling owing to its explicit representation power for computational dependencies among submodles. Nevertheless, it doesn't seem to offer a systematic way of composing a structured model from submodels. In order to develop a systematic way, this paper discusses three key issues : (1) Genus structure for model composition, (2) Storage of structured models, and (3) Integration of structured models. To formalize and visualize the approach, a programming module is developed to implemented the step-by-step integration.

• 한국경영과학회:학술대회논문집
• /
• 대한산업공학회/한국경영과학회 1990년도 춘계공동학술대회논문집; 한국과학기술원; 28 Apr. 1990
• /
• pp.49-60
• /
• 1990

Structured modeling provides a formal mathematical framework, language, and computer-based environment for conceiving, representing, and manipulating a wide variety of models. It provides a natural framework for integrated modeling owing to its explicit representation power for computational dependencies among submodels. Nevertheless, it doesn't seem to offer a systematic way of composing a structured model from submodels. In order to develop a systematic way, this paper discusses three key issues; (1) Genus structure of validated submodel, (2) Storing method of genus structure, and (3) Integration of genus structures to generate a new genus structure. To visualize the approach, a programming module is developed to implement the step-by-step integration.

• 한국공작기계학회:학술대회논문집
• /
• 한국공작기계학회 2000년도 추계학술대회논문집 - 한국공작기계학회
• /
• pp.119-124
• /
• 2000

We developed a Off-Line Graphic Simulator which can simulate a robot model in 3D graphics space in Windows 95 version. 4 axes SCARA robot was adopted as an objective model. Forward kinematics, inverse kinematics and robot dynamics modeling were included in the developed program The interface between users and the off-line program system in the Windows 95's graphic user interface environment was also studied. The developing language is Microsoft Visual C++. Graphic libraries, OpenGL, by Silicon Graphics, Inc. were utilized for 3D graphics.

• 인터넷정보학회논문지
• /
• 제8권4호
• /
• pp.159-171
• /
• 2007

본 논문은 실용적인 한국어 형태소 분석기 개발에 사용될 수 있는 도구인 MADE를 소개한다. MADE는 형태소 사전에서 제공되는 인접 조건만을 사용하여 형태소 분석을 수행한다. 이것은 형태소 분석기를 개발하기 위해 별도의 프로그래밍은 전혀 하지 않고 단지 형태소 사전만 구축하면 된다는 것을 의미한다. MADE는 형태소 사전을 구축하고 검증하는데 필요한 기능들을 제공한다. 일단 형태소 사전이 구축되고 나면 MADE는 독립된 형태소 분석기로서 사용될 수도 있고 형태소 분석기를 필요로 하는 다른 응용 소프트웨어에 내장되어 사용될 수도 있다.

• 대한전기학회논문지:전력기술부문A
• /
• 제52권11호
• /
• pp.668-674
• /
• 2003

The electric marketplace is in the midst of major changes designed to promote competition. No longer vertically integrated with guaranteed customers and suppliers, electric generators and distributors will have to compete to sell and buy electricity. Unit commitment (UC) in such a competitive environment is not the same as the traditional one anymore. The objective of UC is not to minimize production cost as before but to find the solution that produces a maximum profit for a generation firm. This paper presents a hi-level formulation that decomposes the UC game into a generation-decision game (first level game) and a state(on/off)-decision game (second level game). Derivation that the first-level game has a pure Cournot Nash equilibrium(NE) helps to solve the second-level game. In case of having a mixed NE in the second-level game, this paper chooses a pure strategy having maximum probability in the mixed strategy in order to obviate the probabilistic on/off state which may be infeasible. Simulation results shows that proposed method gives the adequate UC solutions corresponding to a NE.

• 산업경영시스템학회지
• /
• 제21권46호
• /
• pp.207-219
• /
• 1998

Multiple Objective Programming(MOP) has been suggested for the solution of completed decision problems. Decision analysis in numerous areas, including energy and environmental planning, necessarily requires consideration of multiple conflicting objectives, MOP has been successfully applied to a number of these problems. The objective of this paper is to present a MOP process which are integrated model with the Input-Output(I-O) analysis for energy and environment planning in industrial sectors. In the model, three objectives are observed such as (1) value added (2) total energy consumption and (3) environmental impacts. Special emphasis is placed on the police implications of industrial structures.