• 제목/요약/키워드: parameterized modeling

검색결과 40건 처리시간 0.032초

Parameterized Simulation Program with Integrated Circuit Emphasis Modeling of Two-level Microbolometer

  • Han, Seung-Oh;Chun, Chang-Hwan;Han, Chang-Suk;Park, Seung-Man
    • Journal of Electrical Engineering and Technology
    • /
    • 제6권2호
    • /
    • pp.270-274
    • /
    • 2011
  • This paper presents a parameterized simulation program with integrated circuit emphasis (SPICE) model of a two-level microbolometer based on negative-temperature-coefficient thin films, such as vanadium oxide or amorphous silicon. The proposed modeling begins from the electric-thermal analogy and is realized on the SPICE modeling environment. The model consists of parametric components whose parameters are material properties and physical dimensions, and can be used for the fast design study, as well as for the co-design with the readout integrated circuit. The developed model was verified by comparing the obtained results with those from finite element method simulations for three design cases. The thermal conductance and the thermal capacity, key performance parameters of a microbolometer, showed the average difference of only 4.77% and 8.65%, respectively.

요추에 있어서 파라미터 기법과 단면CT영상을 이용한 3차원 형상 모델링의 비교 (Comparision of 3-D Geometrical Modelling of the Lumbar Spine Using Parameterized and Cross-sectional CT Image Reconstruction Method)

  • 김성민;김성재;탁계래;김남현
    • 대한의용생체공학회:학술대회논문집
    • /
    • 대한의용생체공학회 1998년도 추계학술대회
    • /
    • pp.159-160
    • /
    • 1998
  • In this study, a three-dimensional geometrical parameterized finite element modeling of the lumbar spine is compared with the 3-D reconstruction model from 2-D CT image. feasibility and accuracy of the parameterized modeling method is evaluated compared with conventional 3-D reconstruction method from 2-D CT image.

  • PDF

UML 2.0 프로파일링을 이용한 FORM 아키텍처 모델링 (Modeling FORM Architectures Based on UML 2.0 Profiling)

  • 양경모;조윤호;강교철
    • 한국정보과학회논문지:소프트웨어및응용
    • /
    • 제36권6호
    • /
    • pp.431-442
    • /
    • 2009
  • 소프트웨어 제품 생산 라인(Software Product Line) 공학은 새로운 소프트웨어 개발 패러다임으로 각광받고 있다. SPL에 FORM(Feature-Oriented Reuse Method) 방법론을 적용하면, 휴대전화나 디지털TV 같이 공통점이 많은 제품군의 다양한 소프트웨어를 휘처 모델링을 통해 만들어진 재사용 가능하고 유연한 컴포넌트를 조합하여 생산해 낼 수 있다. 한편, MDA(Model Driven Architecture) 방법론은 PIM(Platform Independent Model) 을 통해 다양한 개별 플랫폼을 위한 소프트웨어를 생산할 수 있게 하는 새로운 기술을 제공한다. 위 두 가지 방법론의 장점을 조합하면 공통점을 공유하면서 다양한 플랫폼에서 동작하는 제품군의 소프트웨어를 생산하는데 도움이 된다. 이 논문에서는 FORM 방법론과 MDA 방법론을 조합하기 위해 먼저, 프로파일링 기법을 통해 UML2.0을 확장하여 FORM 아키텍처와 Parameterized Statechart 모델링이 가능하게 한다. 다음으로, 휘처가 휘처 모델과 Parameterized Statechart사이에서 일관성 있게 element의 형태로 위치하고 있는지 검증하는 일관성 규칙을 제공한다. 몇 가지 규칙은 FORM 아키텍처와 Parameterized Statechart 사이의 일관성을 검사하기 위해 고안되었다. 마지막으로, 엘리베이터 시스템의 사례연구를 통해 이 논문에서 제안하는 모델링 기법과 일관성 검사 법칙의 유효성을 제시한다.

OPERA-3d 전처리기에서의 변수화 모델링 기법 (Parametric Modeling Technique in OPERA-3d Preprocessor)

  • 임인택;이상진
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1998년도 하계학술대회 논문집 A
    • /
    • pp.214-216
    • /
    • 1998
  • Parameterizing a model is one of the most efficient ways of conducting "virtual prototying" i.e. exploring the "What if?" scenario. But it is very difficult to construct parameterized models in commercial based FEM programs, because they usually adopt the mouse inputs in their GUI, which cannot be parameterized. We consolidated a parametric modelling technique in OPERA-3d preprocessor, which is one of world leading electromagnetic analysis programs, by combining the mouse inputs in GUI with it's FORTRAN-based self script command language.

  • PDF

기하공간정보(OSI)와 병합정보(SN)을 이용한 고유 명칭 방법 (An OSI and SN Based Persistent Naming Approach for Parametric CAD Model Exchange)

  • 한순흥;문두환
    • 한국CDE학회논문집
    • /
    • 제11권1호
    • /
    • pp.27-40
    • /
    • 2006
  • The exchange of parameterized feature-based CAD models is important for product data sharing among different organizations and automation systems. The role of feature-based modeling is to gonerate the shape of product and capture design intends In a CAD system. A feature is generated by referring to topological entities in a solid. Identifying referenced topological entities of a feature is essential for exchanging feature-based CAD models through a neutral format. If the CAD data contains the modification history in addition to the construction history, a matching mechanism is also required to find the same entity in the new model (post-edit model) corresponding to the entity in the old model (preedit model). This problem is known as the persistent naming problem. There are additional problems arising from the exchange of parameterized feature-based CAD models. Authors have analyzed previous studies with regard to persistent naming and characteristics for the exchange of parameterized feature-based CAD models, and propose a solution to the persistent naming problem. This solution is comprised of two parts: (a) naming of topological entities based on the object spore information (OSI) and secondary name (SN); and (b) name matching under the proposed naming.

설계초기 동선 분석을 위한 BIM기반 정량 평가지표 및 평가체계에 관한 연구 (BIM-enabled Quantitative Indicators for Analyzing Building Circulation in Early Phase of Design)

  • 신재영;이진국
    • 한국실내디자인학회논문집
    • /
    • 제25권4호
    • /
    • pp.147-155
    • /
    • 2016
  • In order to ensure a certain level of the quality of design, standardized evaluation indicators are being used as an objective criterion. Even though the evaluation indicators are quantifiable, limitations such as inefficiency and inconsistency caused by manual task in the evaluation process still have been found. BIM (Building Information Modeling) technology that is commonly adopted in architectural design process provides an environment which enables us to figure out a building model to be interpreted quantitatively with the basis of the building information model. It supports quantitative, consistent, accurate and quick evaluations so as to improve quality of design even in the initial design phase. This paper aims to establish BIM-enabled quantitative indicators and an evaluation framework to analyze building circulation even in early phase of design. The indicators are composed of 4 types (relative distance, accessibility, simplicity, pedestrian friendliness) and 7 sub-types. The evaluation framework is the process to derive Parameterized Path Value (PPV) as weighting on each indicator. For demonstrating the scalability of the suggested evaluation indicators and the framework, the authors implemented an evaluation tool and a case study has been carried out by using an actual building remodel project.

Parameterized Modeling of Spatially Varying PSF for Lens Aberration and Defocus

  • Wang, Chao;Chen, Juan;Jia, Hongguang;Shi, Baosong;Zhu, Ruifei;Wei, Qun;Yu, Linyao;Ge, Mingda
    • Journal of the Optical Society of Korea
    • /
    • 제19권2호
    • /
    • pp.136-143
    • /
    • 2015
  • Image deblurring by a deconvolution method requires accurate knowledge of the blur kernel. Existing point spread function (PSF) models in the literature corresponding to lens aberrations and defocus are either parameterized and spatially invariant or spatially varying but discretely defined. In this paper, a parameterized model is developed and presented for a PSF which is spatially varying due to lens aberrations and defocus in an imaging system. The model is established from the Seidel third-order aberration coefficient and the Hu moment. A skew normal Gauss model is selected for parameterized PSF geometry structure. The accuracy of the model is demonstrated with simulations and measurements for a defocused infrared camera and a single spherical lens digital camera. Compared with optical software Code V, the visual results of two optical systems validate our analysis and proposed method in size, shape and direction. Quantitative evaluation results reveal the excellent accuracy of the blur kernel model.

Design of A Robust Adaptive Controller for A Class of Uncertain Non-linear Systesms with Time-delay Input

  • Nguyen, Thi-Hong-Thanh;Cu, Xuan-Thinh;Nguyen, Thi-Minh-Huong;Ha, Thi-Hoan;Nguyen, Dac-Hai;Tran, Van-Truong
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 2005년도 ICCAS
    • /
    • pp.1955-1959
    • /
    • 2005
  • This paper presents a systematic analysis and a simple design of a robust adaptive control law for a class of non linear systems with modeling errors and a time-delay input. The theory for designing a robust adaptive control law based on input- output feedback linearization of non linear systems with uncertainties and a time-delay in the manipulated input by the approach of parameterized state feedback control is presented. The main advantage of this method is that the parameterized state feedback control law can effectively suppress the effect of the most parts of nonlinearities, including system uncertainties and time-delay input in the pp-coupling perturbation form and the relative order of non linear systems is not limited.

  • PDF

Tilted beta regression and beta-binomial regression models: Mean and variance modeling

  • Edilberto Cepeda-Cuervo
    • Communications for Statistical Applications and Methods
    • /
    • 제31권3호
    • /
    • pp.263-277
    • /
    • 2024
  • This paper proposes new parameterizations of the tilted beta binomial distribution, obtained from the combination of the binomial distribution and the tilted beta distribution, where the beta component of the mixture is parameterized as a function of their mean and variance. These new parameterized distributions include as particular cases the beta rectangular binomial and the beta binomial distributions. After that, we propose new linear regression models to deal with overdispersed binomial datasets. These new models are defined from the proposed new parameterization of the tilted beta binomial distribution, and assume regression structures for the mean and variance parameters. These new linear regression models are fitted by applying Bayesian methods and using the OpenBUGS software. The proposed regression models are fitted to a school absenteeism dataset and to the seeds germination rate according to the type seed and root.

Direct adaptive control of nonlinear robot dynamics

  • Nam, Kwang-Hee
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 1987년도 한국자동제어학술회의논문집(한일합동학술편); 한국과학기술대학, 충남; 16-17 Oct. 1987
    • /
    • pp.870-875
    • /
    • 1987
  • The payload variation and modeling error can lye parameterized in such a way that known nonlinear functions are multiplied linearly by parameter errors. An adaptive control algorithm is derived for a perturbed linear system with such parameterization. Hence, in this approach no linear approximation of robot system is needed for the application of an adaptive law. The stability of the adaptive control algorithm is established and also supported by a computer simulation result.

  • PDF