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-
- Type:
- Document
- Date Created:
- 1991
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 5d7e83a7ca6c4cd9ab0ccc8a805a7aa7, and d1cfc0fcedb4f6334f34d1ca11dcf292
- Description:
- According to the theory of dissipative structure and the features of the evolution of population in China, the evolutionary equations for the population of cities and towns in every province (except Taiwan and Hainan) of China are obtained. By these equations spatial distribution from 1980 to 1984 and future evolution are shown. Some natures of population in China are discussed.
-
- Type:
- Document
- Date Created:
- 1991
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 5d7e83a7ca6c4cd9ab0ccc8a805a7aa7, and d1cfc0fcedb4f6334f34d1ca11dcf292
- Description:
- In modern era, many system theories and methods have been applied in the industrial enterprise. It is obvious that the quality problems, as one aspect of system, is the one deserving much more important considerations.There are many reasons for studying the quality problem as a system. For example, the enterprises pursued benefits by the way of high quality, although over- done quality is not the best. We should consider it as a system problem. There are many modern management theories such as IE (Industrial Engineering), QC (Quality Control), OR (Operation Research), ZD (zero - defect), PERT (Program Evaluation and Review Technique). If these theories and methods can be applied under the thoughts of Economical Quality System Analysis, it will show the great potentiality.This paper applying the SD theory and method, declares the concept of EQS, attempting to achieve three goals; 1. To analyze the relationship among the Quality-- Cost -- Profit, and seek the best combination of these two factors: Quality and Benefits. 2. To discuss, the appropriate quality level, the combina-tion of Quality and benefit in the process of product design, manufacturing, and sales.3. To study the internal feedback structure, and the model of quality and benefit of industrial enterprises.
-
- Type:
- Document
- Date Created:
- 1991
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 5d7e83a7ca6c4cd9ab0ccc8a805a7aa7, and d1cfc0fcedb4f6334f34d1ca11dcf292
- Description:
- Owing to development of the cubic construction of modern cities and the protective functions of underground space against the disasters such as earthquake and air raids by modern weapons, the development of urban underground space and the construction of protective sheltering against disasters have become an important policy for many cities. Nevertheless, contradictions between investment and benefit as well as between protection and economy will often occur as a result of the very expensive cost of underground space development. As managers of system, they tend to need to understand these problems and adopt effective measures to find out solutions for them. The method of System Dynamics is no doubt a useful tool for the studies of such problems.This paper has established a system dynamic model about urban underground space development and civil defence construction, including development fund raising, fund distribution, urban underground space construction, subways (i.e., underground railway) construction, urban population and the other auxiliary business dealings performed by the development departments. The model has successfully solved the problem of offering methods for the efficiency of protecting against disasters, the social and economic benefits of urban underground space development and civil defence construction. It reveals the feedback and circulation mechanism and tendency of urban underground space development and civil defence construction.
-
- Type:
- Document
- Date Created:
- 1991
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 5d7e83a7ca6c4cd9ab0ccc8a805a7aa7, and d1cfc0fcedb4f6334f34d1ca11dcf292
- Description:
- This paper presents two approaches to forecast the National Finance Income (NFI) and the Amount of Currency Circulation (ACC) of China . Firstly it uses Combined Hierarchical Periodic Adjustment (CHPA) forecasting approach, which fully considers the periodic characteristics of the stochastic time-varying financial system, to forecast the national finance income, and then it uses Controlled Auto-Regressive models with Multi-Step Recursive (MSR) algothrim to forecast the amount of currency circulation, both have got better results.
-
- Type:
- Document
- Date Created:
- 1991
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 5d7e83a7ca6c4cd9ab0ccc8a805a7aa7, and d1cfc0fcedb4f6334f34d1ca11dcf292
- Description:
- Since society developing and technology progressing, product’s life period is going to short. Meanwhile market competition is getting more intense. Factory has to develop new products required by martket rapidly so that factory can get developing. This paper applies system dynamics model to simulate a process of new products developed in a factory, finds problems, put forward scheme of solving problems. The factory has carried out this scheme, the period of new products developed has been shorted 50 per cent. Some new products have occupied market rapidly.
-
- Type:
- Document
- Date Created:
- 1991
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 5d7e83a7ca6c4cd9ab0ccc8a805a7aa7, and d1cfc0fcedb4f6334f34d1ca11dcf292
- Description:
- We have been using system dynamics with the management team of a consumer electronics company to investigate problems in training, inventory control and debt handling. In this paper we describes how the modelling approach was introduced to the company and subsequently used to support management team decision making. A small model of a direct mail campaign shows how the modelling process improved team understanding and inventory and demand dynamics. Building on experience from the project we comment on conditions for model building (training, team make-up, facilitation, model size, role of the computer) that encourage the active participation of management teams.
-
- Type:
- Document
- Date Created:
- 1991
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 5d7e83a7ca6c4cd9ab0ccc8a805a7aa7, and d1cfc0fcedb4f6334f34d1ca11dcf292
- Description:
- This paper examines four policy options for evaluating the overall performance of a Public sector engineering firm in India. The major areas viz. finance, production, human resources and research & development are taken up for the study. The System Dynamics methodology was chosen as the tool for conducting the analysis because it provides means for understanding the dynamic inter-relationships between key functional parameters thereby allowing to explore the impact of different policies.
-
- Type:
- Document
- Date Created:
- 1991
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 5d7e83a7ca6c4cd9ab0ccc8a805a7aa7, and d1cfc0fcedb4f6334f34d1ca11dcf292
- Description:
- Just as the feedback concept is the single most essential characteristic of the system dynamics approach, so accounting feedback is the most crucial basis of Accounting Dynamics (AD), a methodology for modeling and simulating accounting using system dynamics. In this presentation, we focus on accounting feedback.We should like to emphasize that accounting information has essentially feedback characteristics and that its origin can be traced back to the laws of Hammurabi. Since that time, the concepts of stewardship and accountability, for which accounting measurements are exclusively addressed, have formed the feedback nature of accounting information and effectively controlled resource allocation in social systems.Conceptually, accounting feedback has three aspects, which correspond to the stages of AD model development. They are the formal requirements of double entry bookkeeping, institutional regulations in financial statements and the real functions of accounting information performing feedback control over the economic resources. Formal feedback is the intrinsic nature of the account system. Based on double entry bookkeeping, the account system of an economic entity constitutes a constantly balanced closed system. Data entry into the account system must automatically occur twice so that the system is always balanced. This account system with debtor and creditor sides provides the formal requirements of accounting feedback.Institutional regulations reflect generally accepted accounting principles. From the viewpoint of society as a whole, they introduce an approach of total optimization into individual accounting feedback. From the feedback viewpoint one of the most typical accounting principles is the principle of continuity, which forces continuous observance of the same accounting rule over consecutive accounting periods. Once one uses the straight line method of depreciation, for example, one must use it in the next period. Institutional accounting feedback substantially constrains business income.Finally, the resource allocation feedback aspect of accounting information implies the real function of accounting in social system. Investigating the actual conditions of resource allocation in social systems through accounting feedback control is the very core of Accounting Dynamics. How is resource allocation in our society effected by accounting information? The answer to this question is the ultimate objective of our research.
-
- Type:
- Document
- Date Created:
- 1991
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 5d7e83a7ca6c4cd9ab0ccc8a805a7aa7, and d1cfc0fcedb4f6334f34d1ca11dcf292
- Description:
- The article advances and discusses a theory that using diagraph theory to analyse SD flow diagram. First, on the basis of the concept strongly connected digraph generation out-tree and extreme out-tree, we prove two existence generation out-tree theorem and three relative propositions of flow diagram generation out-tree. The method to define the extreme out-tree and feedback loop set are obtained in complicated SD flow diagrams, also the general laws are advanced that each variable produces corresponding increment that in the feedback loop and extreme out-tree and at the different simulation moment, one increment ∆x is given certain variable x. All these conclusions are useful to the debugging and the result-analysis of SD model and are also useful to analyse the effects of controll variable in system.
-
- Type:
- Document
- Date Created:
- 1991
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 5d7e83a7ca6c4cd9ab0ccc8a805a7aa7, and d1cfc0fcedb4f6334f34d1ca11dcf292
- Description:
- This paper introduces a system dynamics simulation language - - - DYNAMOC developed by authers. In the paper, we first focus on discussing the program structure, software functions and features. Secondly, a simulation example is provided to illustrate our DYNAMOC.