Mitsubishi Electric

About: Mitsubishi Electric is a company organization based out in Ratingen, Germany. It is known for research contribution in the topics: Signal & Voltage. The organization has 23024 authors who have published 27591 publications receiving 255671 citations. The organization is also known as: Mitsubishi Electric Corporation & Mitsubishi Denki K.K..

Concordia: An Infrastructure for Collaborating Mobile Agents

Abstract: Use of the Internet and the World-Wide-Web has become widespread in recent years and mobile agent technology has proliferated at an equally rapid rate. In this paper, we introduce the Concordia infrastructure for the development and management of network-efficient mobile agent applications for accessing information anytime, anywhere, and on any device.

Method and apparatus for reconciling different versions of a file

Abstract: In a distributed file environment, a system for safely updating a file wiut risk of losing work performed at one site due to work performed on the file at another site uses a journal or log at each site which is updated after a file is modified. This log is compared with the logs from other sites before a file is used at any one site, so that new versions can be propogated automatically and safely to out-of-date sites, with the user immediately alerted if conflicting versions of the file exist at different sites. The reconciliation can be applied to collections of files, automatically updating only those files for which it is safe to and necessary do so. Since reconciliation occurs at times selected by the user, inconsistent or partially completed versions of files need not be propogated to other sites. Additionally, logs may be built incrementally by occasionally observing the state of the systems in terms of the files and their time stamps and creating additional log entries reflecting appearance, disappearance and changes of files. Furthermore, logs may be purged of obsolete entries by including additional log entries indicating the most recent time each site has participated in a reconciliation and deleting obsolete entries that all sites have seen.

Development of a Knowledge Based System for Power System Restoration

Abstract: A knowledge based system is developed for automatic control of a power system in the restorative state. System operator's heuristics seem to play a central role during the course of system restoration. So efforts are made to represent those heuristics by a set of knowledge the goal of which is to restore the power supply without overloading any transmission line. While the overload check is a numerical computation, reasoning in the knowledge based system is a symbolic computation. A method to link these two different types of computation is proposed. The knowledge based system is expected to serve managing a large scale power system in the restorative state.

An 80-MHz 8-bit CMOS D/A converter

Abstract: A high-speed 8-bit D/A converter has been fabricated in a 2-/spl mu/m CMOS technology. In order to achieve high accuracy, a current-cell matrix configuration and a switching sequence called symmetrical switching have been used. The mismatch problem of small-size transistors has been relaxed by this matrix configuration. The linearity error caused by an undesirable current distribution of the current sources has been reduced by symmetrical switching. A high-speed decoding circuit and a fast-setting current source have been developed. The experimental results show that the maximum conversion rate is 80 MHz, a typical DC integral linearity error is 0.38 LSB, a typical DC differential linearity error is 0.22 LSB, and the maximum power consumption is 145 mW. The chip size is 1.85 mm/spl times/2.05 mm.

Shift register circuit and image display apparatus containing the same

Abstract: A shift register circuit comprises a first transistor between a gate line output terminal and a clock terminal, a second transistor between the gate line output terminal and a first power supply terminal, a third transistor between a carry signal output terminal and the clock terminal and a fourth transistor between the carry signal output terminal and the first power supply terminal. Gates of the second and fourth transistors are connected to each other. A fifth transistor connected between a gate of the first transistor and a second power supply terminal and a sixth transistor connected between a gate of the third transistor and the second power supply terminal have gates both of which are connected to an input terminal. With this constitution, it is possible to suppress an influence between two synchronous output signals outputted from the shift register circuit.