Search Results 1-20 of 1018

  • Quantitative Assessment of the Contribution of Meteorological Variables to the Prediction of the Number of Heat Stroke Patients for Tokyo

    Sato Takuto , Kusaka Hiroyuki , Hino Hideitsu

    … The variable selection with Akaike's information criterion (AIC) showed that all the four meteorological elements were selected for the prediction model. … Additional analysis showed that the combination of daily mean temperature, maximum relative humidity, maximum wind speed, and total solar radiation as explanatory variables gives the best prediction, with approximately 19% less error than the conventional single-variable model which only uses the daily mean temperature. …

    SOLA, 2020

    J-STAGE 

  • Multiple Harmonics Reduction Method for the Integrated On-board Battery Charging System of Hybrid Electric Vehicles

    Kang Ho-Sung , Kim Seok-Min , Lee Kyo-Beum

    … Different harmonics can be expressed as a unity variable in the synchronous reference frame by utilizing the phase sequence of the harmonics. … The unified variable reduces the harmonic controller and simplifies the gain value selection. …

    IEEJ Journal of Industry Applications 9(3), 235-243, 2020

    J-STAGE 

  • STRUCTURAL ESTIMATION WITH WORK START TIME CHOICE MODEL FOR EVALUATION OF TDM POLICY  [in Japanese]

    KOBAYASHI Wataru , YAGINUMA Hideki , IWAKURA Seiji

    <p>首都圏における朝ラッシュ時間帯の慢性的な混雑・遅延問題解決に向け,企業の始業時刻を平準化する TDM 施策が検討されている.本研究では,TDM 施策評価を念頭に企業間の戦略的な相互関係を考慮した始業時刻選択モデルを構築した.具体的には,ゲーム理論の枠組みを基本として,各地域に立地する企業体が 30 分ごとに区切った 7 つの時間帯を選択するものとし,地域間の空間的・時間的な経済的 …

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management) 75(6), I_455-I_462, 2020

    J-STAGE 

  • EXPLORING THE SUPPLY AND DEMAND RELATIONSHIP OF MEDICAL SERVICES FOR EACH DIAGNOSIS-RELATED GROUP

    XU Feifan , ZHAO Shichen , YAMAMOTO Ryuta

    … Furthermore, by comparing the estimated value with the actual value, the accuracy of the estimated result was improved over the conventional model, and the features and the influence of medical treatment specialties were clarified by introducing the explanatory variable of hospital attributes. …

    Journal of Architecture and Planning (Transactions of AIJ) 85(769), 637-646, 2020

    J-STAGE 

  • A Predictive Model for 6-Month Mortality in Elderly Patients with Heart Failure

    Suzuki Sho , Motoki Hirohiko , Kanzaki Yusuke , Maruyama Takuya , Hashizume Naoto , Kozuka Ayako , Yahikozawa Kumiko , Kuwahara Koichiro

    … We used a multiple logistic regression analysis with stepwise variable selection to select predictive variables and to determine weighted point scores. …

    International Heart Journal 61(2), 325-331, 2020

    J-STAGE 

  • A Modified Moving-Window Partial Least-Squares Method by Coupling with Sampling Error Profile Analysis for Variable Selection in Near-Infrared Spectral Analysis

    YANG Wuye , WANG Wenming , ZHANG Ruoqiu , ZHANG Feiyu , XIONG Yinran , WU Ting , CHEN Wanchao , DU Yiping

    … <p>In this study, a new variable selection method, named moving-window partial least-squares coupled with sampling error profile analysis (SEPA-MWPLS), is developed. … The performance of SEPA-MWPLS was tested with two near-infrared (NIR) spectra datasets and was compared with PLS, MWPLS and Monte Carlo uninformative variable elimination (MC-UVE). …

    Analytical Sciences 36(3), 303-309, 2020

    J-STAGE 

  • Managerial Foreign Experience and Outward Foreign Direct Investment: Evidence from China

    Wen Wen , Yun Ke , Xiaonan Sun

    … We also use the instrumental variable approach, the propensity score matching procedure, and the Heckman two-stage selection model to mitigate potential endogeneity concerns. …

    AGI Working Paper Series (2019-08), 1-44, 2019-09

    IR 

  • Spectral Deconvolution Based on Bayesian Variable Selection  [in Japanese]

    川島 貴大 , 庄野 逸

    分光学において,測定したスペクトルデータからピーク数・ピーク形状・各ピークのパラメータを推定することは,試料の物性を知るために重要なタスクである.この分光スペクトルのピーク分離に関してレプリカ交換モンテカルロ法によるベイズ的スペクトル分解が提案されており,人工および実データに対して適切にピークを分離できることが示されている.しかしこの手法ではモデル選択の方法に基づいてピーク数を推定するため,複数の …

    情報処理学会論文誌数理モデル化と応用(TOM) 12(2), 34-43, 2019-07-17

    IPSJ 

  • Assessing frontline HIV service provider efficiency using data envelopment analysis: a case study of Philippine social hygiene clinics (SHCs)

    近藤 正英 , Xerxes T. Seposo , Ichiro Okubo , Masahide KONDO

    … the efficiency of the social hygieneclinics (SHC) in the Philippines as well as to determine the association of the meta-predictor to the efficiencies.Methods:In determining efficiency, we used the variables from two data sources namely the 2012 Philippine HIVCosting study and 2011 Integrated HIV Behavioral and Serologic Surveillance, as inputs and outputs, respectively.Various data management protocols and initial assumptions in data matching, imputation and variable selection,were used to create the final dataset with 9 …

    BMC Health Services Research 19(1), 2019-06

    IR 

  • Regularization parameter selection for penalized empirical likelihood estimator

    Ando Tomohiro , Sueishi Naoya

    Economics Letters (178), 1-4, 2019-05

    IR 

  • Small, Variable Sperm in a Barn Swallow Population with Low Extra-Pair Paternity

    Hasegawa Masaru , Arai Emi , Nakamura Masahiko

    Zoological science 36(2), 154-158, 2019-04

  • Geriatric nutritional risk index predicts all‐cause deaths in heart failure with preserved ejection fraction

    西 功 , 瀬尾 由広 , 石津 智子 , 佐藤 希美 , 小池 朗 , 青沼 和隆 , 家田 真樹 , Isao NISHI , Yoshihiro SEO , Yoshie Hamada‐Harimura , Masayoshi Yamamoto , Tomoko ISHIZU , Akinori Sugano , Kimi SATO , Seika Sai , Kenichi Obara , Shoji Suzuki , Akira KOIKE , Kazutaka AONUMA , Masaki IEDA

    … proportional hazard regression models were constructed to evaluate the influence of the GNRI on all‐cause death with the following covariates using forward stepwise selection: age, sex, nutritional status based on the GNRI as a categorical variable, history of HF hospitalization, haemoglobin level, estimated glomerular filtration rate, log brain natriuretic peptide levels (logBNP), history of hypertension, log C‐reactive protein levels, left ventricular ejection fraction, left ventricular mass index, and the New York Heart …

    ESC Heart Failure 6(2), 396-405, 2019-04

    IR 

  • A Study on Detection of Symptoms of Dementia based on EEG in Oddball Paradigm  [in Japanese]

    三輪 晃暉 , 吉川 大弘 , 古橋 武 , 寳珠山 稔 , 牧野 多恵子 , 柳川 まどか , 鈴木 裕介 , 梅垣 宏行 , 葛谷 雅文

    脳波が認知症スクリーニング検査のMMSE(Mini-Mental State Examination)スコアと関係があることが報告されている.そのため,脳波計測を行うことでMMSEスコアを推定できれば,認知症早期発見支援につながると期待される.しかしMMSEスコアと脳波の特徴量との関係は,これまで定量的には同定されていない.そこで本研究では,名古屋大学医学部附属病院老年内科に通院している患者を対象 …

    情報処理学会論文誌数理モデル化と応用(TOM) 12(1), 1-10, 2019-03-15

    IPSJ 

  • A STUDY ON COURSE SELECTION FACTORS IN STROLLING ON A MAP  [in Japanese]

    YAMASAKI Wataru , NISHINA Daisaku , HU Yang , TANAKA Takahiro

    …  As a study for pedestrian's behavior, course selection behavior have been studied variously so far. … However, studies dealing with course selection behaviors have not been sufficiently accumulated. … For example, when people read maps, how do they plan the course, what are their strategies for course selection, what kind of street they want to choose. … The aim of this paper is to clarify the relationship between street pattern and course selection behavior. …

    Journal of Environmental Engineering (Transactions of AIJ) (756), 103-113, 2019-02

    J-STAGE  AIJ 

  • Variable Motion Indication for On-Neck Communication : variation and selection with wrist-watch type device  [in Japanese]

    井藤 隆秀 , 近藤 一晃 , 中村 裕一 , ロシター ジョナサン , 秋田 純一 , 戸田 真志

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 118(405), 115-120, 2019-01-17

  • AE-based Classifier Estimating and Eliminating Variables that Deteriorate the Classification  [in Japanese]

    石井 良尚 , 高梨 昌樹 , 三田 勝史

    Neural Networksベースの識別器(NN識別器)は,学習用データが網羅的に収集されていない場合,本来識別に無関係な変数を利用して識別するように学習してしまい,テストデータに対する識別精度が悪化することがある.この精度悪化を回避するための手段として,学習用データに対する変数選択の実施が考えられる.しかし,既存の変数選択手法をNN識別器に対して適用する場合,以下に示す2つの課題が存在する.1 …

    情報処理学会論文誌 60(1), 260-269, 2019-01-15

    IPSJ 

  • Predictive Principal Variable Selection Criteria for Linear RegressionAnalysis with Applications to Statistical Quality Control-Basic Idea-  [in Japanese]

    KUROKI Manabu , MATSUURA Shun

    … This paper considers a variable selection problem in linear regression analysis when multicollinear- ity exists between explanatory variables. …

    Journal of The Japanese Society for Quality Control 49(4), 293-298, 2019

    J-STAGE 

  • Effects of Parent Selection Schemes from Other Tasks on the Search Performance of Evolutionary Multiobjective Multitasking  [in Japanese]

    Hashimoto Ryuichi , Masuyama Naoki , Nojima Yusuke , Ishibuchi Hisao

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    Proceedings of the Fuzzy System Symposium 35(0), 59-64, 2019

    J-STAGE 

  • Development of a short surrogate index for children's socioeconomic status using house possessions and investigation of its validity  [in Japanese]

    Ishii Ryo , Murayama Kou , Fukuzumi Noriaki , Ishikawa Shin-ichi , Ohtani Kazuhiro , Sakaki Michiko , Suzuki Takashi , Tanaka Ayumi

    … To confirm that the item selection and validity in Study 1 did not involve sampling error, Study 2 investigated the reproducibility of validity with a different sample. … Studies in different disciplines using the short surrogate index can be conducted because SES can be both the main and confounding variable.</p> …

    The Japanese journal of psychology 90(5), 493-502, 2019

    J-STAGE 

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