An Analysis of and Proposed Improvement to Supply-chain Systems Using Pull Systems, Faculty of Literature & Social Sciences, Yamagata University Annual Research Report, (11) 59-67, 2014

Single Author

An Analysis and an Improved Control Method for the Suppy-chain System Using Control Theory - a case of the push system, Faculty of Literature & Social Sciences, Yamagata University Annual Research Report, (10) 27-36, 2013

Single Author

An Analysis of the Supply Chain System using a Time-delay Systems Representation - a case when subsystems are two, Faculty of Literature & Social Sciences, Yamagata University Annual Research Report, (9) 69-73, 2012

Single Author

An Interpretation of the Servo System for Supply Chain and Its Application, Bulletin of Graduate School of Social & Cultural Systems at Yamagata University, (7) 105-109, 2010

Single Author

A study of the Supply Chain as a Time-delay System -a Case when the Leadtime is Known-, Faculty of Literature & Social Sciences, Yamagata University Annual Research Report, (6) 157-162, 2009

Single Author

The Present State and Approach for Activation of Urban Area of Matsuyama City, Bulletin of Yamagata University (Social Science), 40(1) 97-105, 2009

Single Author

A Case Study of the Strategy for Attracting Overseas Visitors - A Comparison of Beppu and Yufu Cities-, Bulletin of Graduate School of Social & Cultural Systems at Yamagata University, (6) 27-33, 2009

Single Author

The effects of individual differences among agents in artificial society models, Faculty of Literature & Social Sciences, Yamagata University Annual Research Report, (5) 33-44, 2008

Multiple Authorship (Only Japanese)

A control approach if the bullwhip effect in the supply chain -an analysis of time-delay systems via memoryless feedback control-, Faculty of Literature & Social Sciences, Yamagata University Annual Research Report, (5) 205-214, 2008

Single Author

An examination of Question Form in German Web-CALL System -Multiple Choice Item Writing and Blank-filling Questions-, Bulletin of Research Center of Higher Education at Yamagata University, (1) 42-49, 2007

Multiple Authorship (Only Japanese)

Stability condition of linear discrete systems with time-varying delay -LMI condition considering causality, Faculty of Literature & Social Sciences, Yamagata University Annual Research Report, (4) 129-134, 2007

Naofumi Nishihira

Single Author

ドイツ語Web-CALLシステムに対する学生の問題意識について, 山形大学人文学部研究年報, (2) 137-146, 2005.04

西平　直史

Multiple Authorship (Including Foreigners)

ドイツ語Web-CALLシステムにおけるより効果的な出題形式－選択式と記述式の比較－, 山形大学大学院社会文化システム研究科紀要, (2) 25-32, 2005.04

西平　直史

Multiple Authorship (Including Foreigners)

ドイツ語CALLシステムにおけるより効果的な質問環境の構築, 山形大学人文学部研究年報, 創刊号 175-181, 2004.04

西平　直史

Multiple Authorship (Including Foreigners)

インターネットを用いたドイツ語授業補助システムの開発と実践－定冠詞の練習問題, 山形大学紀要（教育科学）, 13-3 205-214, 2004.04

西平　直史

Multiple Authorship (Including Foreigners)

LMI Approach in Stability and Control of Time-delay Systems, Proc. of SICE Annual Conference 2003, 2681-2686, 2003.04

西平　直史

Multiple Authorship (Including Foreigners)

Robust Stabilization of Uncertain Time-delay Systems via Dynamic Memoryless State Feedback, Proc. of SICE Annual Conference 2002, 2002.08

西平　直史,N. Nishihira and K. Yasuda

Multiple Authorship (Including Foreigners)

むだ時間システムのロバスト安定化；－双線形行列不等式とホモトピー法による計算法－, 神戸大学大学院自然科学研究科紀要，20-B, 2002.03

西平　直史

Multiple Authorship (Including Foreigners)

保守性を軽減したむだ時間システムの線形行列不等式型ロバスト安定条件, 計測自動制御学会論文集，38-2, 2002.02

西平　直史

Multiple Authorship (Including Foreigners)

Robust stability and stabilization for a class of uncertain time-delay systems via linear matrix inequlity, Proc. of the 3rd Asian Control Conference, 2000.07

西平　直史

Multiple Authorship (Including Foreigners)

線形むだ時間システムに対する一安定条件, システム制御情報学会論文誌，12-3, 1999.03

西平　直史

Multiple Authorship (Including Foreigners)

むだ時間システムの外乱抑制ロバスト安定化, システム制御情報学会論文誌, 11-2(93/95) , 1998.04

西平　直史

Multiple Authorship (Including Foreigners)

むだ時間システムの外乱抑制ロバスト安定化, システム制御情報学会論文誌，11-2, 1998.02

西平　直史

Multiple Authorship (Including Foreigners)