摘要:

A number of developments in socio-economic systems modelling are presented and developed. A dynamic economic input-output model, based on the static Leontief model, is presented. The economic model is used as the basis for the development of a dynamic sociological system model accounting for social stratification and social mobility. The direct and indirect connections of the two models are discussed. Finally, an optimization problem based on the two models and consideration of the labour aspects of the two models is formulated.

ISSN:0020-7721    

DOI:10.1080/00207727608941996

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

Information systems have become increasingly complex over recent years, underscoring the challenge of designing systems which will provide the different functions in an organization with the information necessary for effective decision-making. With rapidly developing computer technology, it is natural that information systems evolve inamanner which is greatly dependent on computing hardware and software. Yet, there has been little development in the techniques of systems analysis and design to handle new and less well understood functions which are of increasing interest.

ISSN:0020-7721    

DOI:10.1080/00207727608941991

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

This paper describes an approach for decomposition and reduction of dynamical models of largo scale power systems. In this approach the system is decomposed into two subsystems, the first one is described by a linear model while the second is described byanon-linear model. This decomposition is based on a derived criteria for linearization by which we can know the two subsystemsa priori. Further, the linear subsystem model is reduced by aggregation and hence the order of the system is reduced. The results of the validity of this approach as applied to two different largo power systems are indicated.

ISSN:0020-7721    

DOI:10.1080/00207727608941992

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

The purpose of this paper is to develop an analytic foundation—called Constraint Theory—for the systematic determination of mathematical model consistency and computational allowability. Constraint Theory's primary application is the more efficient construction and use of heterogeneous, multidimensional mathematical models, especially when interdisciplinary technical teams, system analysts, and managers are involved.

ISSN:0020-7721    

DOI:10.1080/00207727608941993

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

This paper presents several digital implementations for two-dimensionalE-filters. TheE-filter is based on a non-linear transformation into the spatial domain. Its response is essentially independent of the frequency of the incoming signal under certain conditions, but depends largely on the digital amplitude. Several digital realizations and attendant problems are presented forE-filters applied to biomedical images obtained from an Anger scintillation camera. The associated sensitivity of the digitalE-filter to changes of its parameters is examined. A two-dimensional linear filter is realized by the use of a bi-cubic spline interpolation scheme. The boundary detection of unprocessed and filtered images is also investigated using the hexagonal Golay transform. Several examples of abnormal heart and brain-scans are presented including the filtered images and bounded areas of infarcted and abnormal tissue.

ISSN:0020-7721    

DOI:10.1080/00207727608941994

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

In this paper a numerical method is presented for computing the invariant zeros of a controllable linear, time-invariant, multivariable system described by the 4-tuplo (A, B, C, D) or the triple (A, B, C). The method is based on the fact. that a controllable system can be made maximally unobservable by means of state variable feedback, thereby causing the cancellation of the invariant zeros by an equal number of the system poles. The invariant zeros are obtained as the eigenvalues of a matrix of the same dimension as the number of invariant zeros. The method is applicable to both multivariable as well as single-input, single-output systems. Examples are given to illustrate the use of the method.

ISSN:0020-7721    

DOI:10.1080/00207727608941995

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor