Erratum to: Development of a Theory of Constraints Based Scheduling System for Ship Piping Production

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Study of a simple sensor for stress history measurements of a structural member using a piezoelectric element

This paper describes a stress sensor using a piezoelectric element which was developed to monitor features of the stress history of a structural member. The sensor is 90 mm long, 60 mm wide, and 25 mm thick. A stress-level meter can turn on and off different colored light-emitting diodes (LED) according to the changes in a stress level. A stress-level cross counter can display the number of cycles which exceeds a specified stress level during a monitoring period. The sensor is bonded onto a structural member using an adhesive agent. In order to see the performance of the prototype sensor, experiments were carried out using a fatigue-testing machine. The sensor was bonded onto a smooth specimen and multiple repeated stresses were applied to that specimen. There were three main findings. (1) The sensor can operate under a stress range from −150 MPa to 150 MPa, and a frequency from 0.05 Hz to 5 Hz. (2) The stress-level meter can turn the lights of the LED on and off accurately under any stress amplitude and frequency. (3) When the stress frequency is 1 Hz or less, the stress-level cross counter can count accurately the number of cycles which exceed the predetermined stress levels. Received: February 25, 2000 / Accepted: April 11, 2000     

日本N700系列高速列车的发展

中日本铁路公司将于明年在东海道新干线上引进新一代的高速列车，这将为铁路建立新的技术标准奠定基础：同时，这也展现了该公司在过去42年里为提高东海道新干线的运输能力做出不懈努力所取得的最新成果。     

基于ITOC的船舶管系生产进度控制系统研究(英文)

Manufacturing of ship piping systems is one of the major production activities in shipbuilding. The schedule of pipe production has an important impact on the master schedule of shipbuilding. In this research, the ITOC concept was introduced to solve the scheduling problems of a piping factory, and an intelligent scheduling system was developed. The system, in which a product model, an operation model, a factory model, and a knowledge database of piping production were integrated, automated the planning process and production scheduling. Details of the above points were discussed. Moreover, an application of the system in a piping factory, which achieved a higher level of performance as measured by tardiness, lead time, and inventory, was demonstrated.     

Efficacy of bus service reorganization utilizing a hub-and-spoke topology and DRT to meet community needs: A case study of Tokigawa town

The purpose of this study is to verify the efficacy of a route/timetable reorganization methodology focused on a hub-and-spoke schedule bus architecture as well as the introduction of demand responsive transport (DRT) in suburban or underpopulated areas in Japan to accommodate local requirements.     

Development of a theory of constraints based scheduling system for ship piping production

Manufacturing of ship piping system is one of the major production activities in shipbuilding. The schedule of pipe production has an important impact on master schedule of shipbuilding. In this research, the theory of constraints (TOC) concept is introduced to solve the scheduling problems of piping factory, and an intelligent scheduling system is developed. The system integrates a product model, an operation model, a factory model and a knowledge database of piping production and can make the process planning and production scheduling automatically. In the paper, details of above points are discussed. Moreover, an application of the system in a piping factory, which achieves a higher level of performance as measured by tardiness, lead time and inventory, is demonstrated at the end of the paper.