Search Results 1-20 of 254

  • A HOMOTOPY ALGORITHM FOR SOLVING ENTROPY MAXIMIZATION PROBLEM OF OD MATRIX ESTIMATION  [in Japanese]

    MOGI Wataru

    <p>既存の OD 交通量データと起終点間の経路選択確率が先験値として得られているときに,道路ネットワーク上の観測リンク交通量から OD 表を逆推定する手法として,残差平方和最小化モデルやエントロピー最大化モデルなどが開発されている.これらの手法のうち,エントロピー最大化モデルについては,制約条件付き非線形計画問題もしくはその最適性条件である非線形連立方程式を数値的に解く必要があり,解 …

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management) 76(5), I_837-I_846, 2021

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  • Layout Design of Components and Conductors in Noise Filter by Integrative Optimization of Structural Topology and External Variables  [in Japanese]

    MARUYAMA Shun , YAMASAKI Shintaro , NOMURA Katsuya , YAJI Kentaro , FUJITA Kikuo

    <p>本論文では,ノイズフィルタの回路素子の配置,および導体パターンを統合的に考慮した最適レイアウト設計法を提案する.先行研究ではトポロジー最適化法に基づく導体パターン設計法が提案されているが,素子の配置を与条件としていたため,ノイズフィルタ全体の最適性という観点からは部分最適解しか得られていなかった.本研究では,それら両方を考慮した最適化を行うために,メタモデリングによる構造形態と外 …

    Transactions of the Japan Society for Computational Engineering and Science 2021(0), 20210007-20210007, 2021

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  • Characterizations of the basic constraint qualification and its applications

    Kuroiwa Daishi , Suzuki Satoshi , YAMAMOTO Shunsuke

    … In convex programming, the basic constraint qualification is a necessary and sufficient constraint qualification for the optimality condition. …

    Journal of Nonlinear Analysis and Optimization 11(2), 99-109, 2020-10-19

    IR 

  • The *Long-C Constraint and Word-Initial Aspirates in Hateruma Yaeyama, a Southern Ryukyuan Language

    李 勝勲 , 麻生 玲子 , Seunghun J. LEE , Reiko ASO

    国際基督教大学 / ベンダ大学国立国語研究所波照間方言は,沖縄県八重山郡竹富町に属する波照間島で話されている言語である。波照間方言の特 徴として,語頭の無声阻害音に強い帯気が報告されている。この帯気は,フットに関する韻律条件,す なわちフットには必ず重音節が必要であるという条件を満たすために実現していると考えられる。本論 文では,強い帯気が観察されるパターンを概観し,*Long-C 制約の適用を提 …

    国際基督教大学学報. I-A, 教育研究 = International Christian University publications. I-A, Educational studies (62), 39-47, 2020-03-31

    IR  DOI 

  • The *Long-C Constraint and Word-Initial Aspirates in Hateruma Yaeyama, a Southern Ryukyuan Language

    李 勝勲 , 麻生 玲子

    … In Hateruma, there is a limited distribution of strong aspiration in disyllabic words which is argued to be the result of a prosodic condition for a foot: all feet must have at least one heavy syllable. …

    国際基督教大学学報. I-A 教育研究 = Educational Studies (62), 39-47, 2020-03-31

    IR  DOI 

  • Attitude Control of a Spacecraft as an LPV Model Using the ILQ Method

    SHIMOMURA Takashi , OGURA Hayate , KANATA Sayaka

    … The existing optimality condition is also rebuilt in a linear matrix inequality (LMI) condition and generalized for LPV systems. …

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN 18(6), 344-349, 2020

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  • LIMIT OPERATION IN PROJECTIVE SPACE FOR CONSTRUCTING NECESSARY OPTIMALITY CONDITION OF POLYNOMIAL OPTIMIZATION PROBLEM

    Iori Tomoyuki , Ohtsuka Toshiyuki

    制約想定を必要としない新しい最適性必要条件の導出 --すべての最適解が満たす方程式の新しい導出方法を提案--. 京都大学プレスリリース. 2020-11-09.

    Journal of the Operations Research Society of Japan 63(4), 114-133, 2020

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  • Examining Off-Grid in Terms of Maintenance Cost of Power Grid  [in Japanese]

    Watashi Yuto , Sano Masato , Suzuki Tsutomu , Ohsawa Yoshiaki

    <p>オフグリッド(独立電源)を導入するにあたり,配電網維持管理コストと,切り離された住民へ電力を供給する独立電源コストとの間にトレードオフが生じる.ここでのオフグリッドとは,電力会社の配電網から完全に分離した電力システムを意味している.本研究の目的は,このトレードオフを二目的最適化問題として定式化し,配電網の電源位置の影響も含めオフグリッド政策を分析することである.第一に,単純な地理 …

    Journal of the City Planning Institute of Japan 55(3), 393-399, 2020

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  • Mixed Duopoly Stochastic Sales Model with Advertising and Experience Gains for the Public and Foreign Competitors

    Kalashnikov Vitaliy , Kalashnykova Natalyia , Kuzmin Petr

    … It means that the optimal control is to maximize private firm revenues taking into account possible uncertainties of stochastic profit flow using Bellman's optimality condition. …

    Journal of Advanced Computational Intelligence and Intelligent Informatics 24(5), 662-667, 2020

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  • Optimality Conditions and Constraint Qualifications for Quasiconvex Programming

    Suzuki Satoshi

    … In mathematical programming, various kinds of optimality conditions have been introduced. … In the research of optimality conditions, some types of subdifferentials play an important role. … Recently, by using Greenberg–Pierskalla subdifferential and Martínez-Legaz subdifferential, necessary and sufficient optimality conditions for quasiconvex programming have been introduced. …

    Journal of Optimization Theory and Applications 183(3), 963-976, 2019-12

    IR 

  • On the Euler Equation and the Transversality Condition of Overtaking Optimal Solution in Macroeconomic Dynamics

    Yuhki HOSOYA

    … In this paper, we consider the traditional capital accumulation model with continuous time, and derive the Euler equation for a necessary condition and the Euler equation with the transversality condition for a sufficient condition of overtaking (or, weakly overtaking) optimality. …

    経済研究所 Discussion Paper = IERCU Discussion Paper (320), 2019-09-06

    IR 

  • Robust minimax optimization problems with applications (Nonlinear Analysis and Convex Analysis)

    Jiao Liguo , Kim Do Sang

    … In this paper, we study the optimality conditions and duality in minimax programming problems in the face of data uncertainty. … Then, by using the obtained result, we propose the necessary condition for optimal solutions of the considered problem; …

    数理解析研究所講究録 (2114), 96-102, 2019-05

    IR 

  • A survey on second-order conditions for nonlinear symmetric cone programming via squared slack variables (New Trends of Numerical Optimization in Advanced Information-Oriented Society)

    Fukuda Ellen Hidemi , Lourenco Bruno Figueira , Fukushima Masao

    … Using such reformulations, we show how to obtain second-order optimality conditions for NSCP problems. … In particular, under the strict complementarity condition, we lead to a description of the so-called sigma-term. …

    数理解析研究所講究録 (2108), 135-143, 2019-04

    IR 

  • Conditional Optimality of Learning Automata with 2-state Bayesian Estimators

    Hara Motoshi , Kanayama Noriyo , Watanabe Toru , Kato Satoru , Kamaya Hiroyuki

    … In this study, we show the sufficient condition for conditional optimality of the β-type LA which consists of 2-state Bayesian estimators.</p> …

    Proceedings of the ISCIE International Symposium on Stochastic Systems Theory and its Applications 2019(0), 223-228, 2019

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  • Conditions of Existence of the Solution of the Observation Optimization for the Kalman-Bucy Filter

    TAKEUCHI Yoshiki

    … In the previous works the author, by introducing a change of variables using eigenvalues and eigenvectors of a symmetric matrix, the condition of optimality of these variables was obtained. … It will be also shown in this paper that under what condition the optimal gain fails to exist and that how one can avoid the situation by modifying the weight matrix in the cost function.</p> …

    Proceedings of the ISCIE International Symposium on Stochastic Systems Theory and its Applications 2019(0), 64-69, 2019

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  • On the Optimality of Gabidulin-Based LRCs as Codes with Multiple Local Erasure Correction

    KIM Geonu , LEE Jungwoo

    … Its distance optimality has been further shown to cover the case of multiple (<i>r</i>,<i>δ</i>)-locality, where the (<i>r</i>,<i>δ</i>)-locality constraints are different among different symbols. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E102.A(9), 1326-1329, 2019

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  • Visual secret sharing schemes encrypting multiple images

    佐々木 愛美 , 渡邊 曜大

    … Next, a sufficientcondition to be satisfied by the encryption of VSS schemesrealizing an access structure for multiple secrets of the mostgeneral form is introduced, and two constructions of VSS schemeswith encryption satisfying this condition are provided. … Finally, the optimality ofthe former construction is examined, giving that there exist accessstructures for which it generates no optimal VSS schemes. …

    IEEE Transactions on Information Forensics and Security = IEEE Transactions on Information Forensics and Security 13(2), 356-365, 2018-02

    IR 

  • Optimal Scalar Linear Index Codes for Some Two-Sender Unicast Index Coding Problems

    Chinmayananda A. , B. Sundar Rajan.

    IEICE Proceeding Series (55), 105-109, 2018

    DOI 

  • Analysis of a Sufficient Condition on the Optimality of a Decoded Codeword of Soft-Decision Decodings for Binary Linear Codes on a 4-Level Quantization over an AWGN Channel

    KUSAKA Takuya

    … <p>In this paper, a study of a sufficient condition on the optimality of a decoded codeword of soft-decision decodings for binary linear codes is shown for a quantized case. … Simulation results on the (64,42,8) Reed-Muller code indicates that the condition is effective for SN ratios at 3[dB] or higher for any iterative style optimum decodings.</p> …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E101.A(3), 570-576, 2018

    J-STAGE 

  • Characterizations of the solution set for non-essentially quasiconvex programming

    Suzuki Satoshi , Kuroiwa Daishi

    … Previous characterizations are based on necessary and sufficient optimality conditions and invariance properties of subdifferentials. … We derive necessary and sufficient optimality conditions for quasiconvex programming by means of Martínez–Legaz subdifferential, and, as a consequence, investigate characterizations of the solution set in terms of Martínez–Legaz subdifferential. …

    Optimization letters 11(8), 1699-1712, 2017-12

    IR 

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