On the stability of control systems with randomly time-varying characteristics†

The purpose of this paper is to study the stability conditions of randomly time-varying control systems.

First we define the stability, in the stoehastic sense, of the control system with randomly time-varying characteristics and secondly we obtain the conditions for global stability in the mean for a control system which is governed in each time interval by two different differential equations with probability p and 1-q respectively.

Finally we examine the stability condition for the concrete control systems by experiments of the Monte Carlo method.     

Comprehensive evaluation of new urban transportation systems by AHP

Many different kinds of transportation systems such as ‘group rapid transit’, etc., have recently been presented as ideal urban public transportation systems. When planning to introduce such a new transportation system into a city, it is necessary to select the most desirable system for that city from those that have been proposed. The comprehensive evaluation of transportation systems must reflect various aspects such as the costs of construction and maintenance and the viewpoints or both the system users and the local inhabitants. This makes it one of the most difficult and yet vitally important problems in public transportation planning. The analytic hierarchy process (AHP) developed by T. L Saaty is straightforward and has the feature that it can deal with both qualitative and quantitative factors at the same time, and it is suitable for applying to complex evaluation problems, In this paper, three transportation systems are proposed for one of the newly planned towns in Kansai Cultural and Academic Research Complexes, and a comprehensive evaluation of these systems is performed by applying the AHP. It has been proved through the process of evaluation that information which is very useful in reaching a consensus for choosing a system can be obtained.     

On the design of optimal output feedback control systems†

For a linear control system with quadratic performance index the optimal control takes a feedback form of all state variables. However, if there are some states which are not fed in the control system, it is impossible to obtain the optimal feedback control by using the usual mathematical optimization technique such as dynamic programming or the maximum principle.

This paper presents the optimal control of output feedback systems for a quadratic performance index by using a new parameter optimization technique.

Since the optimal feedback gains depend on the initial states in the output feedback control system, two cases where (1) the initial states are known, and (2) the statistical properties of initial states such as mean and covariance matrices are known, are considered here. Furthermore, the proposed method for optimal output feedback control is also applied to sampled-data systems.     

小波分析在结构健康诊断中的应用

小波变换由于同时在时间域和频率域具有良好的局部化性质，且具有很强的处理非平稳过程的能力，因此广泛地应用于许多领域。对小波变换在结构健康诊断中的应用进行了分析．作为一个具体应用，根据一木结构的振动台试验数据，利用小波分析方法对该结构的动力特性进行了分析．     

CARCINOGENICITY TEST OF QUERCETIN AND KAEMPFEROL IN RATS BY ORAL ADMINISTRATION

Quercetin and kaempferol were tested for carcinogenicity in rats of both sexes. In Experiment I, 0.1% quercetin or control diet was given to Fischer 344 rats for 540 days. In experiment II, 0.04% kaempferol or control diet was given to ACI rats for 540 days. In both experiments, most tumors found in the experimental groups were also found in the corresponding control groups, and there were no statistical differences in the incidences of tumors in the experimental groups and the respective control groups. Quercetin and kaempferol were not shown to be carcinogenic to rats under these conditions.     

固体废弃物在超/近临界水中连续分解装置的研制

利用超／近临界水具有的特性,探索固体废弃物在超／近临界水中的再资源化技术。由于固体废弃物料在高温高压水中连续分解的反应装置。固体物料与水混成浆料供给反应器,解决了某些固体物料向高温高压反应器中的连续输送问题,浆料的固含量可达10％（wt）以上。并对模式物质——纤维素和木质素;实物——米糠、豆腐渣和稻壳等进行了连续分解实验,运行结果稳定。本工作证实了通过将固体废弃物与水混成浆料的方式,实现固体废弃物在超／近临界水中连续处理的可能性。     

ANALYSIS OF THE PUNGENT PRINCIPLES OF Capsicum annuum BY COMBINED GAS CHROMATOGRAPHY-MASS SPECTROMETRY

SUMMARY— The pungent principles of Capsicum annuum includes at least five closely related compounds . Four of these pungent compounds-capsaicin, dihydrocapsaicin, nordihydrocapsaicin and homodihydrocapsaicin-were separated by gas chromatography with a 3% SE-30 column and identified by combined gas chromatography-mass spectrometry. Separation of these compounds into oleoresin capsicum by gas chromatography is also reported.     

Cholesterol Lowering Activity of Ropy Fermented Milk

The effect of ropy fermented milk on serum cholesterol in rats was studied. Basic diets containing slime-forming Lactococcus lactis subsp. cremoris SBT 0495, its non slime-forming variant SBT 1275, and acidified reconstituted skim milk, with 0.5% cholesterol added, were fed to F-344 rats for 7 days. Serum cholesterol level of rats fed the ropy fermented milk were the lowest among the three treatments. The serum high-density lipoprotein (HDL) cholesterol/total cholesterol ratio of rats fed ropy fermented milk was the highest. Slime materials produced by L. lactis subsp. cremoris SBT 0495 had a beneficial effect on rat cholesterol metabolism.     

Project Execution Capability, Organizational Know-how and Conglomerate Corporate Growth in Late Industrialization

In many successful late-industrializing countries in the 20thcentury, business groups with operating units in technologicallyunrelated industries have acted as the microeco-nomic agentof growth. This paper explores why this business form has characterizedcountries which industrialized ‘late’, and why thisform succeeded in the early phases of catching up whereas theadvanced-country conglomerate has had an undistinguished performance.The paper uses internal resource-base theories of the firm toexplore the significance of organizational knowledge and resultingincreasing returns in the group form which, even in mature marketsand especially in late industrialization, constitute a sustainablesource of competitiveness. In the case of late industrializationforeign technology acquisition capability became a necessarycondition for corporate success. In the best diversified businessgroups this capability was transformed into organizational knowhow that provided a key resource in the effectiveness of corporategrowth through diversification. The first two parts of the paperbriefly survey diversified industrial groups in historical contextsand then across a broad array of late-industrializing countries.Then the paper considers why diversification was not prevalentamong firms attempting to catch up in earlier historical periods,why the strategy of leading late industrializing firms was oneof diversification rather than specialization and why theirchosen diversification path was one involving technologist collyunrelated industries. This is followed by the core argumentof the paper about the transformation of technology acquisitioninto a competitive asset and illustrated with evidence fromSouth Korea. Finally, the paper analyzes why the behavior ofthe late industrializing group differs from that of the Americanconglomerate.