報告書番号

U99033

タイトル（和文）

計算科学のための基盤的ソフトウェア環境に関する研究 --電中研・日立共同研究の成果（その１）--

タイトル（英文）

A Study on Software Infrastructures for Computational Science and Engineering - The First Report for the CRIEPI-Hitachi Joint Research Project -

概要 （図表や脚注は「報告書全文」に掲載しております）

電力中央研究所と日立製作所は、平成10～12年度の予定で共同研究「分散オブジェクトによる科学応用システムに関する研究」に着手した。本研究は、ネットワーク上の通信メッセージを介してソウトウェアの部品を連携させる分散オブジェクトを用いて、様々な計算機やデータを組み合わせて利用する基盤を構築し、数値解析の同時並行的可視化と制御を行うトラッキング・ステアリング（Ｔ＆Ｓ）システム等と融合することにより、計算科学を支援する総合的環境を実現することを目標としている。これまでに、分散オブジェクトによるソフトウェア基盤の構築と構造解析等への適用に着手した。また、Ｔ＆Ｓシステムを改良し、都市熱環境モデルや座屈解析に適用して性能向上を確認した。さらに、並列可視化ソフトウェアを高度化し、高温岩体発電のための水圧破砕試験やドップラーレーダによる降雨観測に適用し、現地観測データの可視化における有効性を示した。

概要 （英文）

As a consequence of diversifying applications of computational science and engineering, it becomes of greater importance to prepare software infrastructures that assist flexible networking over various computational resources. Commonly recognizing these problems, a joint study group formed by the Central Research Institute of Electric Power Industry (CRIEPI) and Hitachi Ltd. has been conducting "Applications of Distributed Objects to Scientific Computing Systems " from FY1998 thru FY2000. This study aims at developing software infrastructures for scientific computing with distributed object technologies, and merging them with tracking/steering systems and parallel visualization software developed by the previous study of the joint research group. This interim report shows the current progress of the joint study, which is summarized as follows: (1)A software infrastructure was designed with distributed object technologies, which can manage meta-information of computational resources on networks and support their connectivity and control of execution. A multi-faced problem solving system and a Java-based structural simulation system were prepared as components which will be integrated on the infrastructure. (2) The tracking/steering systems were improved in data transfer architecture and their applications to buckling analysis showed higher performance. Various advanced features of the systems were applied to urban heat environment analysis, and showed their possibilities in understanding complicated time-varying spatial data. (3) New features were added to the parallel volume rendering software, which include varying brightness for time-series data, perspective projection, and surrounding projection on spherical screens. The volume renderer showed its practical usefulness in applications on in-situ observation, which include acoustic emission of bedrock acquired at a test site of hot-dry-rock geothermal power generation, and reflectivity factors of a Doppler radar which scans rainfalls in three dimensions.

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