首页期刊导航|Journal of applied systems studies: Methodologies and applications for systems approaches
期刊信息/Journal information
Journal of applied systems studies: Methodologies and applications for systems approaches
Cambridge International Science Publishing
Cambridge International Science Publishing
年3期
1466-7738
Journal of applied systems studies: Methodologies and applications for systems approaches/Journal Journal of applied systems studies: Methodologies and applications for systems approaches
查看更多>>摘要：Systems thinking and systems related concepts are found in one of the Chinese classics: the Tao Te Ching. Practical applications of this early systems approach in medicine are described. The historical trace of this medical theory reveals the fact that the concept of systems and the connection between the parts and whole can be dated back to at least the time of China's Yellow Emperor of 2600 B. C.
查看更多>>摘要：Distributed systems, such as multi-database OLTP (Online Transaction Processing) and OLAP (Online Analytical Processing) applications require capturing the functional semantics of multiple data sources. While a lot of research and development has been done in creating models for data and process modeling (such as ER modeling in database conceptual schema design, and more recently UML), very few have focused on linking the functional semantics of a system with the system specifications. In this paper we establish the need for a methodology for developing systems specification for a data warehouse from functional semantics and develop a system architecture.
查看更多>>摘要：Notions of the externally and internally positive singular discrete-time linear systems are introduced. It is shown that a singular discrete-time linear system is externally positive if and only if its impulse response matrix is nonnegative. Sufficient conditions are established under which a single-output singular discrete-time system with matrices in canonical forms is internally positive. It is shown that if the singular positive system is weakly positive (all matrices E,A,B,C are nonnegative) then it is not internally positive.
查看更多>>摘要：Robotic systems have demonstrated their value in pre-planned activities such as industrial production facilities and have been proposed, and in some cases developed, for applications requiring intelligent behaviors. A previous paper explored the possibility of extending the range of decisions available to a military autonomous robotic vehicle through an intelligent decision support system to predict the degree of threat to the robotic system from an external vehicle. Knowledge was delivered through the system in an interactive manner to affected users via a derived single-equation model. This paper extends the previous research by incorporating variable interdependencies with an econometrically-based model for ranking threats. The model is delivered in an updated version of the decision support system and probed for policy decisions.
查看更多>>摘要：With the emergence of the Internet, the established boundaries of the organizations are becoming blurred and it is becoming mandatory to revise traditional business models in response to internet based developments. A growing number of businesses are finding that they can save money by using collaboration in form of application service providers (ASPs) that use the Internet to offer a range of software and services that would otherwise be performed by internal departments at the company. By hiring application service providers, companies not only lease the software and server computers that house the business applications, but also rely on the skills and knowledge of the ASPs to manage information technology infrastructure. It is envisaged that ASP innovation is the next great business tool. In future, ASPs, on their Internet servers, may host software packages like those ranging from Microsoft Office 2000 to electronic banking. The emergence and expansion of the ASP market is a part of a natural evolution in business communications that can result in massive declines in telecommunication costs and the shift towards network computing architecture. This paper described the role of ASPs in the internet based business. This paper also shows that by becoming an integral part of the new electronic service systems, ASPs have created a new framework for Internet based business model.
查看更多>>摘要：K-systems analysis is a factor analysis technique created through the generalization of key reconstructability analysis definitions and algorithms. The method is applied to functions on systems of discrete variables to discover a set of factors which can explain the bulk of the function's variation from the mean. The method has been used successfully to analyze systems in several disciplines. One of the most serious obstacles to the generalized use of K-systems analysis is the exponential growth of system size as the number of variables and values they assume increases. An algorithm is presented which performs a search of the smaller state space to choose factors to use as starting points for a directed search of the substate space. Complexity analysis and experimental evidence indicate that the directed search technique provides a notable reduction in computation for the search process, while still providing a compact reconstruction.
查看更多>>摘要：In this paper, we argue that by combining the concepts and research in bios and blown-ups, evolutionary processes can be more faithfully understood. In general processes, biotic patterns stand for accumulations of energy and mass, seemingly chaotic stages an indicator of an end of the current structure, and blown-ups the moments when old structures die and new structures are born. Along the line of our analysis, some important problems existing in observations, mathematical modeling and solution schemes are considered.
查看更多>>摘要：The Internet market is global, as is the competition for customers. Online marketing strategies must be well established to develop and maintain the relationship with the customers, since customers can switch to competitive websites in seconds with minimal financial costs. The "stickiness" of the company's Web site , or the ability to create customer loyalty will be an important element in these strategies. Since millions of dollars are spent on Web site stickiness strategies, the investments should be evaluated on financial terms. One approach is to measure the stickiness investments' contribution to the site's revenue and profit. This paper offers such an approach by presenting a profit-oriented marketing model of stickiness investments. The paper also uses simultaneous-equation methods to econometrically operationalize the model. This operationalized econometric model is then used to analyze the effectiveness of stickiness investments for advertising-supported websites.
Juan Carlos MicoAntonio CasellesLorenzo FerrerDavid Soler...
p.644-655页
查看更多>>摘要：The research line suggested in this paper consists of introducing in Systems Dynamics models more than one dimension. That is, in addition to time, to consider other dimensions such as space ones, population cohorts for social systems, kinds of subspecies for ecosystems, and so on. In order to do that, the level-equations of Systems Dynamics are generalized, obtaining adequate equations to construct space-time or multidimensional dynamical models. These models are useful to perform predictions and select control actions over the system object of study, taking into account the dynamics of the system along time, along space and over the other previously mentioned dimensions. A methodology to construct these kinds of models from this generalized approach is suggested and applied to construct multidimensional dynamical models of urban systems.
查看更多>>摘要：This paper considers the joint minimization of trim-loss and premium raw material in cutting stock and allocation decisions in which the fixed processing sequences of jobs are given. It shows that when the ratio of the longest order length to the shortest demand length is small, decision network techniques can be reduced to a tabular form and used as a solution procedure. The proposed solution approach first minimizes trim-loss and then minimizes the use of premium raw material by using alternative length materials whenever possible without increasing trim-loss. This solution technique is imbedded into the model management system to develop a decision support system for use by decision-makers.
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