Sega developed a CAVE-like equipment, which won a higher award of Multimedia Grand Prix 1996. Then, Sega retired many excellent developers from the error of management. Sega changed management policy 180 degrees further again in 2004. A small number of managers are now trying to enclose the developers driven out, by using new good 3D apparatus.

View full abstract

We consider the general aspect of the concept of duality in Mathemetics. The dual space of a linear space may be isomorphic to the original one; we have many examples such that this point of view gives us a new idea and causes an unexpected development for Mathematics.

View full abstract

In convex optimization problems, duality plays an essential role not only in the optimality theory but also in design of efficient numerical methods for solving them. In nonconvex optimization, duality does not necessarily characterize the optimality. Even in such a case, however, duality conmbined with convex relaxation techniques often plays an important role. In this talk, we discuss duality in polynomial optimization as an example of the latter case.

View full abstract

Importance of duality in the development of soliton theory is discussed.

View full abstract

The notion of duality provides a rich framework in control theory that covers wide range of spectrum from modeling, system representation to control system design. In this talk, the historical relation between control and duality is reviewed. Furthermore, new directions of control theory that uses duality are mentioned.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

In studying inherent meanings of forms the radicals of Kanji characters are good materials. In this work the 214 radicals are classified into nine categories according to their meanings. Next, characeritics of forms of radicals, such as numbers of strokes, symmetries and topological parameters are obtained, and their correlation with meanings is derived. Possibility of a general guiding principle in designing icons for operating modern equipments is suggested.

View full abstract

This research was aimed development of computer system that estimates impression of image by Kansei language. Moreover, we collect human Kansei-data to develop of the system, at a time examine effectiveness and problems.

View full abstract

[in Japanese]

View full abstract

In recent years, the relationship between global changes such as global warming, water cycle, etc. and human activities become major concern of the world. One of important application fields of remote sensing is the Earth observation system, which is to observe, visualize and quantify the Earth to provide information for the environmental measures, resource managements, disaster preventions etc. as one of social system. For the innovation of Earth observationsystem, basic transdisciplinary science and technology is inevitable.

View full abstract

The level of decision-making in logistics systems is divided into strategy, tactics, and operation level based on the length of period the decision-making is aimed at. The paper shows various application example of simulation for each level and verifies the validity of simulation .It is proven that the evaluation by simulation at each level in combination with other techniques is quite effective. The paper also refers to the difficulties of simulation.

View full abstract

This paper presents the current trend of SCM:Scupply Chain Management. The progress of latest hardware and software are remarkable, and the mathematical optimization technique has become the big element of SCM realization. In this paper, we show the progress of the mathematical programming method are taking in how in the real world, and the application possibility to the profit-and-loss simulation.

View full abstract

This document describes the best scheduler operation on total process of Industry. SCM of process is constructed by this solution.

View full abstract

This paper discusses the necessity to model a total manufacturing system for the effective support of decision making in the planning and operational stages under the highly networked environment with advanced information technology. A distributed virtual factory, representing a total manufacturing system, is proposed as a decision support platform. The importance to estimate the manufacturing cost based on the simulation data is also discussed from the viewpoint of an index for the performance evaluation of the system.

View full abstract

The enterprise should give priority to the existing customer's maintenance in these days when a lot of markets faced the mature stage. Then, CRM (Customer Relationship Management) that is the technique for building a long-term relation to the customer based on the customer database is of growing importance importance. In this talk, we discuss CRM that uses the mathematical models and the optimization technique.

View full abstract

There are many problems which consider operating status (operating or waiting) and installation and un-installing of equipment in the optimization problem in energy systems. Since starting and a stop, and installation and un-installing are defined as a discrete variable, it poses a mixed integer programming problem which generally requires great time. Although there are the branch-and-bound method and the cutting plane method in order to solve such a problem, the branch-and-cut method, which includes a cutting plane procedure in the branch-and-bound method, is improved in recent years. This research shows the technique of having applied the interior point method to the branch-and-cut method, and reports the calculation result of some problems.

View full abstract

Electoral districts determination is fundamental but complex problem for democracy that is performed in consideration of not only vote-value disparity but also geographical and historical circumstances of municipalities. In this paper, we propose an optimization based procedure for determination of single seat election by using a genetic algorithm. The proposed approach aids determination by means of value of vote and districts cohesiveness. Numerical simulation study is carried out using demographic data of Osaka prefecture and the applicability of this approach is illustrated by districting results.

View full abstract

We have concerned with the strategic design for optimizing logistic networks, and formulated it as a mixed-integer programming problem. Then we have developed a practical and efficient solution method in terms of hybrid use of meta-heuristics and graph algorithm, and shown its effectiveness through various applications. To cope with large-scale problems practically, in this study, we implement its parallel algorithm via PC cluster aiming at reduction of computing time and improvement of accuracy at the same time.

View full abstract

In supply chain system, where the multiple companies are linked in series materially and informationally, the volatility appears not only in market demand but also in every stage of the chain. Apparently, such volatility reflects the psychological tendency of speculation by a retailer for example. This article tries to formulate the speculative ordering by Kalman Filter with multi-stage observer and proposes a concise method to reduce stock cost in the retailer.

View full abstract

This paper concerns with the material ordering and inventory control in supply chains that consist of one manufacturer and multiple retailers under uncertain end customer demand and delivery lead time. The problem is investigated under three controlling policies: the traditionally centralized controlling policy under the manufacturer's perspective, the entire chain's perspective, and the coordinating controlling policy with an incentive scheme. By using Genetic Algorithm (GA) to solve the problems, we show that the coordinating controlling policy with an incentive scheme can outperform the others while creating a win-win situation.

View full abstract

Recently, new business management schemes, like Supply Chain Management and Virtual Enterprise(VE), have been put into practice. Although, information sharing and coordination are known to be potent factors for implementing efficient management under business environment, their effectiveness is not evaluated quantitatively. Therefore, the focus is set on decision making sharing under VE environment, and analysis is made on association between coordination strategies and features of VE through Multi-Agent simulation with different information level given.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

Simultaneous application of data partitioning and local modeling is a useful tool for knowledge discovery from large scale databases, and several models for local PCA and switching regression can be regarded as the hybrid of fuzzy clustering and multivariate analysis. In this research, a new approach to switching PLS regression, in which fuzzy clustering plays a role for data partitioning, is proposed by introducing fuzzy memberships into the iterative algorithm of PLS regression.

View full abstract

Fuzzy clustering is a useful tool for capturing the latent structure of high-dimensional databases, in which the samples are partitioned into several homogeneous sub-groups. In real application, it is often the case that the database to be analyzed includes not only numerical variables but also nominal variables. In this research, we try to perform optimal scaling of nominal variables in the iterative procedures of several clustering algorithms.

View full abstract

[in Japanese]

View full abstract

Responding to the diversifying behavior (like financial standings, cost, energy, environment etc.) of the enterprise and government, the rapidness and transparency are indispensable. However, there exist walls making Black Boxes in the management and system technology during twenty century almost riding on Node (function) Oriented Approach. Link-Oriented Approaches are indispensable for the complicated system supporting Multi-Factorial Decision with multi-disciplinal participation, those of which require the development from Overlooking, Extraction and Summarizing, and Causal Traceability from calculated results. Fortunately, IT technology supporting the bottom is jumping. I would like to make our structure matrix technology to be the 21st century's technology.

View full abstract

[in Japanese]

View full abstract

Following the worldwide trend of deregulation, safety regulation is under re-consideration, whereas accountability of safety administration is demanded by the public. Some method that can take both production efficiency and safety management into account is therefore required to assess safety regulation. This research proposes a social simulation to assess influence of safety regulation on social utility. The model used is a multi-agent system where many production companies act and evolve under a particular style of safety regu-lation as the environment. In conclusion, an effective method for assessment of safety regulation has been developed, and then several insights were shown in this research.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

Recently it has become possible to generate and control a time dependent polarization pulse in which the polarization changes as a function of time within a single femtosecond pulse. In the present work, we develop a numerical code to solve time-dependent Schrodinger equation for a hydrogen atom in time dependent polarization pulse and we study the optical-field ionization (OFI) of a hydrogen atom in the pulse whose plane of polarization rotates. We find that the OFI rate depends on the rotation frequency of the plane of polarization, even though the temporal profile of field strength remains unchanged.

View full abstract

Cooeperative control of a number of traffic signals is expected to play a key role in traffic control. However, such a control system behaves as one of agents in a complex system, so that is is difficult to evaluate its effectiveness. To discuss such a problemin a quantitative fashion, we perform virtual experiments using a multi-agent traffic and environment simulator MATES we are developing.

View full abstract

In evolutionary computation, direct encoding methods have been commonly used for genotype-phenotype mapping. It is difficult to evolve very complex phenotypes with these methods because such phenotypes require very long chromosomes, which cannot be evolved efficiently. To be able to evolve more complex solutions, approaches called artificial embryogeny (AE) have been proposed employing indirect encoding that is inspired from development of embryos in nature. Here we demonstrate the emergence of gene reuse as a result of introduction of developmental encodings, showing the possibility of AE systems.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

The effective scenario acquisition method has been established by combining the chance discovery and the requirements engineering methods. The method consists of the multi-dimensional hearing and the hierarchical integration process. We evaluate its capability through the experiment using a prototype of home controller. The followings have been confirmed: requirement primitives which consist of these purpose, objects, methods, premises and restrictions are elicited by the multi-dimensional hearing; the primitives grow by intersections and chains and are formed into a scenario through the hierarchical integration process; the proposed method exceeded the conventional inspection test in the efficiency of eliciting primitives.

View full abstract

Recently, the neural mechanism of high-level intellectual activity has been extensively studied. While many researches investigated the mechanism of maintenance and manipulation of a mental state, we attempt to unravel the mechanism involved in choice and control of the mental manipulation for path search. We conducted two psychophysical experiments, a search task using arithmetic operations and a simple calculation task for control. The main finding is that the speed of opening new paths drops drastically at some point indi-cating a capacity limit of holding history of opened paths.

View full abstract

Recently, acceptance or rejection of advanced technologies or large-scale development is discussed socially, and sometimes it becomes a serious issue. Under such circumstances, participatory approaches of social decision-making are attracting people's interest. In this research, dynamics of opinion development is compared between different network models by multi-agent simulation. In conclusion, many useful insights on the process of public opinion development were obtained from the simulation. In addition to effects of network structure, effects of opinion leaders and stability of public opinion against manipulation were shown. These results have both positive and negative aspects for public opinion development.

View full abstract

PLIB standard (ISO13584) that is used as a basis of the engineering catalogues and product/parts databases for world-wide usage will be explained in the paper. This includes edition2 of the standard.

View full abstract

JeMarche is the marketplace which has started operation in The Japan Electrical Manufacturers' Association. JeMarche provides many kinds of services to many industries as well as to the heavy electrical industry. The services include the Electronic bidding, the Electronic parts catalogue and the Inter-enterprise design process collaboration. Supply Chain Management beyond the frame of keiretsu affiliated companies is realizable with JeMarche.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

How much confidence we may have in a discovery from data? This problem becomes evident insome applications of Bioinformatics. A novel algorithm for measuring the randomness in data is shown; itcalculates a highly accurate unbiased probability value in terms of statistical hypothesis testing. Geometry,such as distance and curvature, of the space of probability distributions plays an important role in thealgorithm. The key idea is rescaling of the space, which is analogous to the renormalization theory ofstatistical physics.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract