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Naruhito Shiraishi

Bio: Naruhito Shiraishi is an academic researcher from Kyoto University. The author has contributed to research in topics: Wind tunnel & Fuzzy set. The author has an hindex of 14, co-authored 62 publications receiving 905 citations.


Papers
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Journal ArticleDOI
TL;DR: In this paper, it is shown that the rain influence is originated by a rain water rivulet formation along the upper windward surface of cable, and with this rivule formation, an apparent cable cross section becomes aerodynamically unstable.

276 citations

Journal ArticleDOI
TL;DR: The role of rain in the rain-wind induced vibration of the stay cable is shown to be an amplifier of the essential unstable aerodynamic characteristics of the yawed and/or the inclined circular cylinder as discussed by the authors.

103 citations

Journal ArticleDOI
TL;DR: In this article, a fundamental consideration is presented for mechanisms of generation of vortex-induced oscillations which are classified into three groups through wind tunnel tests and it is shown that the geometrical shape factor of the section, namely the slenderness ratio, takes an important role here and in addition, the interrelation of the vortices formed at leading and trailing edges and the induced oscillations of sections is clarified.

95 citations

Journal ArticleDOI
TL;DR: This paper attempts to simplify the calculation process of the structure function and to newly define the state of the top event by the membership function, using fuzzy sets theory, and shows that the importance of each basic event can be evaluated through fuzzy operations.

87 citations

Journal ArticleDOI
TL;DR: The aerodynamic properties and the mechanisms of the aerodynamic behaviors on two-dimensional tandem bluff bodies were investigated by measurements of unsteady pressure distributions around the cylinders and the flow visualization technique as discussed by the authors.

51 citations


Cited by
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Journal ArticleDOI
TL;DR: Fault tree analysis (FTA) is a very prominent method to analyze the risks related to safety and economically critical assets, like power plants, airplanes, data centers and web shops as mentioned in this paper.

504 citations

Journal Article
TL;DR: This paper surveys over 150 papers on fault tree analysis, providing an in-depth overview of the state-of-the-art in FTA, including standard fault trees, as well as extensions such as dynamic FT, repairable FT, and extended FT.
Abstract: Fault tree analysis (FTA) is a very prominent method to analyze the risks related to safety and economically critical assets, like power plants, airplanes, data centers and web shops. FTA methods comprise of a wide variety of modelling and analysis techniques, supported by a wide range of software tools. This paper surveys over 150 papers on fault tree analysis, providing an in-depth overview of the state-of-the-art in FTA. Concretely, we review standard fault trees, as well as extensions such as dynamic FT, repairable FT, and extended FT. For these models, we review both qualitative analysis methods, like cut sets and common cause failures, and quantitative techniques, including a wide variety of stochastic methods to compute failure probabilities. Numerous examples illustrate the various approaches, and tables present a quick overview of results.

344 citations

Journal ArticleDOI
TL;DR: This survey describes all the results known to the authors as of approximately August 1981 and describes the effect on bandwidth of local operations such as refinement and contraction of graphs, bounds on bandwidth in terms of other graph invariants, the bandwidth of special classes of graph, and approximate bandwidth algorithms for graphs and matrices.
Abstract: The bandwidth problem for a graph G is to label its n vertices vi with distinct integers f(vi) so that the quantity max{| f(vi) − f(vi)| : (vi vj) ∈ E(G)} is minimized. The corresponding problem for a real symmetric matrix M is to find a symmetric permutation M' of M so that the quantity max{| i − j| : m'ij ≠ 0} is minimized. This survey describes all the results known to the authors as of approximately August 1981. These results include the effect on bandwidth of local operations such as refinement and contraction of graphs, bounds on bandwidth in terms of other graph invariants, the bandwidth of special classes of graphs, and approximate bandwidth algorithms for graphs and matrices. The survey concludes with a brief discussion of some problems related to bandwidth.

301 citations

Book
01 Jan 1997
TL;DR: In this paper, uncertainty modeling and analysis in engineering and the sciences has been studied, with the goal of helping current and future analysts and practitioners to understand the fundamentals of knowledge in knowledge discovery.
Abstract: Engineers and scientists often need to solve complex problems with incomplete information resources, necessitating a proper treatment of uncertainty and a reliance on expert opinions. Uncertainty Modeling and Analysis in Engineering and the Sciences prepares current and future analysts and practitioners to understand the fundamentals of knowledge a

295 citations

Journal ArticleDOI
TL;DR: The Method of Imprecision (MoI), a formal method, based on the mathematics of fuzzy sets, for representing and manipulating imprecision in engineering design, can provide formal information upon which to base decisions during preliminary engineering design and can facilitate set-based concurrent design.
Abstract: The decisions with the greatest importance and potential cost (if wrong) are made early in the engineering design process. A method for representing and manipulating imprecise and vague information in design is described, particularly focused on the preliminary phase when the (fuzzy) imprecision and uncertainty in the descriptions of the design artifact are high. The preferences of designers and customers are captured with fuzzy sets. Formal methods for including noise, trade-off strategies and design iteration are included. Increasing the information available to a designer will reduce the risk of making design decisions incorrectly. Providing (fuzzy) set-based information to engineers can facilitate concurrency in design.

292 citations