• 제목/요약/키워드: macro-modeling approaches

검색결과 5건 처리시간 0.015초

A New Approach for Accurate RTL Power Macro-Modeling

  • Kawauchi, Hirofumi;Taniguchi, Ittetsu;Fukui, Masahiro
    • JSTS:Journal of Semiconductor Technology and Science
    • /
    • 제10권1호
    • /
    • pp.11-19
    • /
    • 2010
  • Register transfer level power macromodeling is well known as a promising technique for accurate and efficient power estimation. This paper proposes effective approaches based on the tablebased method for the RTL power macro-modeling. The new parameter SD, which characterizes the distribution of switching activities for each gate in the circuit, is one of the contributions. The new parameter SD has strong correlation with power consumption. We also propose an accurate table reference method considering the circuit characteristics. The table reference method is applicable for every table-based method and outputs more accurate power value. The experimental results show that the combination of the proposed methods reduces max error 30.36% in the best case, comparing conventional methods. The RMS error is also improved 1.70% in the best case.

In-plane response of masonry infilled RC framed structures: A probabilistic macromodeling approach

  • De Domenico, Dario;Falsone, Giovanni;Laudani, Rossella
    • Structural Engineering and Mechanics
    • /
    • 제68권4호
    • /
    • pp.423-442
    • /
    • 2018
  • In this paper, masonry infilled reinforced concrete (RC) frames are analyzed through a probabilistic approach. A macro-modeling technique, based on an equivalent diagonal pin-jointed strut, has been resorted to for modelling the stiffening contribution of the masonry panels. Since it is quite difficult to decide which mechanical characteristics to assume for the diagonal struts in such simplified model, the strut width is here considered as a random variable, whose stochastic characterization stems from a wide set of empirical expressions proposed in the literature. The stochastic analysis of the masonry infilled RC frame is conducted via the Probabilistic Transformation Method by employing a set of space transformation laws of random vectors to determine the probability density function (PDF) of the system response in a direct manner. The knowledge of the PDF of a set of response indicators, including displacements, bending moments, shear forces, interstory drifts, opens an interesting discussion about the influence of the uncertainty of the masonry infills and the resulting implications in a design process.

Modeling of the lateral stiffness of masonry infilled steel moment-resisting frames

  • Lemonis, Minas E.;Asteris, Panagiotis G.;Zitouniatis, Dimitrios G.;Ntasis, Georgios D.
    • Structural Engineering and Mechanics
    • /
    • 제70권4호
    • /
    • pp.421-429
    • /
    • 2019
  • This paper presents an analytical model for the estimation of initial lateral stiffness of steel moment resisting frames with masonry infills. However, rather than focusing on the single bay-single storey substructure, the developed model attempts to estimate the global stiffness of multi-storey and multi-bay frames, using an assembly of equivalent springs and taking into account the shape of the lateral loading pattern. The contribution from each infilled frame panel is included as an individual spring, whose properties are determined on the basis of established diagonal strut macro-modeling approaches from the literature. The proposed model is evaluated parametrically against numerical results from frame analyses, with varying number of frame stories, infill openings, masonry thickness and modulus of elasticity. The performance of the model is evaluated and found quite satisfactory.

과학기술이슈에 대한 일반인의 인식분석: 토픽모델링을 활용한 원자력발전 사례 (How does the General Public Understand Science and Technology Issues?: A Case on the Nuclear Power Issue Using Topic Modeling Approach)

  • 최현도;안종욱
    • 기술혁신연구
    • /
    • 제23권4호
    • /
    • pp.151-175
    • /
    • 2015
  • 과학기술 수용자는 과학기술 변화과정을 결정하는 중요한 이해관계자이다. 하지만 이들이 과학기술이슈에 대해 어떤 생각을 가지고 있는지 확인하는 기존의 방법들은 많은 노력과 시간이 필요한 것으로 알려져 왔다. 본 연구에서는 빅데이터 분석에 널리 사용되는 토픽모델링을 활용해 온라인 토론장에 게시된 글을 분석하여 한국인의 원자력발전에 대한 인식을 알아보고자 한다. 이것은 거시이슈들이 일반 과학기술 수용자 인식구조에 어떤 영향을 미치며, 변화된 인식구조의 지속성을 이해하는데 도움을 줄 수 있다. 빅데이터를 이용해 실시간으로 특정 과학기술이슈에 대한 일반인의 인식을 파악한다면, 과학기술 수용자(일반인)와 공급자(전문가) 집단 사이의 인식간극을 줄이는데 도움을 줄 수 있을 것으로 기대한다.

Enthalpy - based homogenization procedure for composite piezoelectric modules with integrated electrodes

  • Kranz, Burkhard;Benjeddou, Ayech;Drossel, Welf-Guntram
    • Smart Structures and Systems
    • /
    • 제12권5호
    • /
    • pp.579-594
    • /
    • 2013
  • A new enthalpy - based procedure for the homogenization of the electromechanical material parameters of composite piezoelectric modules with integrated electrodes is presented. It is based on a finite element (FE) modeling of the latter's representative volume element (RVE). In contrast to most previously published homogenization approaches that are based on averaged quantities, the presented method uses a direct evaluation of the electromechanical enthalpy. Hence, for the linear orthotropic piezoelectric composite behavior full set of elastic, piezoelectric, and dielectric material parameters, 17 load cases (LC) are used where each load case leads directly to one material parameter. This gives the possibility to elaborate a very strict and easy to program processing. In conjunction with the 17 LC, the enthalpy - based homogenization is particularly suitable for laminated composite piezoelectric modules with integrated electrodes. In this case, the electric load has to be given at the electrodes rather than at the RVE FE model boundaries. The proposed procedure is validated through its comparison to literature available results on a classical 1-3 piezoelectric micro fiber (longitudinally polarized) reinforced composite and a $d_{15}$ shear piezoelectric macro-fiber (transversely polarized) composite module.