Motohisa Funabashi

Optimal control of water distribution systems by network flow theory

This paper presents an optimal control system of water distribution networks. To overcome the large scale and nonlinearity of the network, a network aggregation technique and a two-level control scheme are developed. The first level of the scheme decides operating points using a nonlinear optimization method, where a high speed solving technique of pressure/flow is derived from network flow theory. The second level is a feedback control around the operating points, which absorbs estimate error and small variation in consumption. The scheme has been realized by a minicomputer system and is presently in operation.

A fuzzy model based control scheme and its application to a road tunnel ventilation system

A predictive fuzzy control scheme is presented. The emphasis is on the adaptation mechanism for the knowledge-based linguistic prediction model. The adaptation mechanism used is based on a set of fuzzy dynamical equations according to mathematical dynamical system theory. A road tunnel ventilation control system incorporating the scheme is described. Much better control performance in terms of regulating the air quality in the tunnel and reducing the electrical energy for the ventilation requirements has been achieved.<<ETX>>

Middleware technology for ubiquitous computing: AYA (context-aware and yet another service) that permits autonomous collaboration on super distributed objects

AbstrocrThe present paper proposes a middleware, named AYA, for ad-hoc and autonomous collaboration over the super distributed objects environments where existing information devices cannot be prescribed because of their mobile capability. According to discovery o f the information devices, AYA firstly defines the user context, and secondly assigns roles of information devices based on the scenario for the defined user context, and finally executes the service for the user. These processes are continuously and iteratively conducted where context definition and role assignment in real and dynamic environment are main focuses to be dealt with. Mathematical description of the definition and assignment processes is given as well as some experimental development.

An open modeling infrastructure integrating EDOC and CCM

This paper presents an approach to support the MDA like design of component based distributed applications through the provision of a suitable MOF based modeling infrastructure. This infrastructure is open to a variety of modeling techniques and features the transformation of models based on different meta models. As a concrete example, we will show how EDOC and CCM can be integrated with this modeling infrastructure and consequently how EDOC models are transformed to CCM models.

Development of Open Service Collaborative Platform for Coming ECS by International Joint Efforts

Expectations of the information and telecommunication revolution are pervasive. In business domain, the Internet and the other telecommunication services are anticipated to drive the market to open for creating tremendous business opportunities as well as to permit managers to make real-time decisions for extending their business chances. In social domain, the revolution is expected to reduce environmental loads and consumption of natural resources. It is also expected to leverage mutual understanding among individuals over the world, forming communities and fostering knowledge and cultures.

FLIP-net: a network representation of fuzzy inference procedure and its application to fuzzy rule structure analysis

A method for analyzing dynamic behavior of fuzzy rules using FLIP-net (fuzzy logic inference procedure network), a network representation of a fuzzy inference procedure, is proposed. Using the FLIP-net representation, errors of fuzzy inference output can be backpropagated. Since backpropagated error indicates how each component of fuzzy logic contributes to the output error, analysis of the error distribution over FLIP-net gives useful information about the dynamic behavior of fuzzy rules. It is shown that fuzzy rule deficiencies, such as redundant, missing, or contradictory fuzzy rules, can be detected by this method, and thus efficient addition and/or modification of fuzzy rules becomes possible.<<ETX>>

Development of service integration platform for one-stop service applications

Individual service systems will be combined and collaborated over the network into one-stop service systems within a very short time. According to this vision, Japanese and European parties are developing service integration platform prototypes collaboratively based on autonomous decentralized service system (ADSS) technologies. The platform can be applied to various types of service systems. We introduce an example system for e-government applications developed on the platform.

Efficient brokerage in a CORBA-based service mediation platform

The rapid development of electronic commerce applications and information services has led to a significant need for mediation services. The brokerage of services is one particular mediation service. In this article, we present the design of service brokerage for a CORBA-based mediation platform that symmetrically supports advertising by service providers and navigation by end-users. A particular strength of this design is in the support by dynamic profile and profile rule management for both end-users and service providers. In advertising and navigation, service offer information is dynamically filtered and matched according to the profiles of end-users and service providers, such that an optical focus of information dissemination is achieved. This is a cornerstone for dynamic provisioning of services in order to support the evolution of the marketplace. The presented design is partially based on TINA and OMG specifications.

Systems technologies for the ubiquitous society

As a trans-disciplinary approach to integrate a multi-disciplinary project (Yaoyorozu Project), we propose a concept of combination of systems technologies, that is, mathematical modeling of society, multi-agent simulation, and a scenario generation method. The objectives of the project are to design ubiquitous information society of 2010 and to extract issues of the future information society. This paper reports some research results of these systems technologies; a mathematical model relevant to the spreading of the ubiquitous information systems which consists of mobile/wearable devices and devices in environments, a social simulation focused on ubiquitous community sustainability, and a scenario-generating procedure for extracting future social issues. The synergetic relationship among these three technologies is also discussed.

Socio-technical issues for ubiquitous information society in 2010

The impact of ubiquitous information technology on society has been so powerful that it has generated an urgent and immediate need for directing technological development and preparing institutional apparatus. This paper endeavors to identify and predict the socio-technical issues that face the ubiquitous information society by 2010, by investigating the social implications of emerging technology, as well as social expectations. To study the issues, we developed scenarios that describe hypothetical situations in the ubiquitous information society. The derived issues cover integrating information technology and human body, producing smart sharable environments, protecting individual rights, fostering new service businesses, and forming self-evolving communities.