Electric Power Development Co. and Diamond Engineering Co. | Date: 2012-09-04
Kagimoto H.,Electric Power Development Co. |
Kawamura M.,Kanazawa University
Cement and Concrete Research | Year: 2011
This study aims at proving the validity of a notion that the formation of non-expansive near-surface layer is responsible for surface cracking in ASR-affected concretes by a laboratory experiment. Relationship between the progress rate of the front of non-expansive layer toward inner portions and the formation of the first surface cracks was scrutinized by measuring relative humidity (R.H.) values and strains within a massive concrete cylinder (φ450 mm × 900 mm) with reactive aggregates under a dry environment. It was presumed from the measurements that a non-expansive layer of about 40 mm had been formed at the first cracking. Thereafter, the environmental humidity was raised to > 95% R.H. Pursuit of the growth of surface cracks and subsequent measurements of strains and R.H. values within the concrete cylinder under the moist environment suggested that the re-saturation continuously gave rise to the generation of tensile stresses in near-surface regions leading to active extension of surface cracks. © 2011 Elsevier Ltd. All rights reserved. Source
Kroumov V.,Okayama University of Science |
Yu J.,Zhongyuan University of Technology |
Shibayama K.,Electric Power Development Co.
International Journal of Innovative Computing, Information and Control | Year: 2010
This paper presents a highly efficient potential field-based 3D path planning technique for mobile robots, moving in a known environment. The path planner is based on a direct description of the obstacles by simulated annealing neural networks. The. generated paths are piecewise linear with direction changes at the. corners of the obstacles. The proposed planner can be successfully applied to snake robots, flying robots, and control of Gantry cranes. Several simulation results show the effectiveness of the proposed algorithm. ICIC International © 2010 ISSN 1349-4198. Source
Katou A.,Electric Power Development Co.
IEEJ Transactions on Power and Energy | Year: 2016
The article reviews recent technology trend of overhead transmission line conductors and fittings. Especially, this article deals with "comparison between domestic and foreign conductors and fittings from view points of design, standard and test procedure", "efficiency technology", and "Technology of the improvement in reliability". © 2016 The Institute of Electrical Engineers of Japan. Source
Okazaki Manufacturing Company and Electric Power Development Co. | Date: 2012-03-02
The present invention relates to an in-furnace temperature measurement device