نتایج جستجو برای: مدل vensim

تعداد نتایج: 120134  

2003
Andreas Größler Myrjam Stotz Nadine Schieritz

A software-based integration of agent-based modeling and system dynamics is presented. More precisely, it is described how RePast and Vensim can be coupled using standard procedure calls. In an example from supply chain management, agents modeled with RePast in an agent-based simulation context are provided with system dynamics models as internal schemata, which are built with Vensim. The proto...

Journal: :Int. J. Communication Systems 2014
Xiaorong Zhu Mehrdad Dianati Hongbo Zhu

The heterogeneous networks belonging to different service providers (SPs) form a coalition system for maximizing the profit, where they may either compete or cooperate with each other. In this paper, we introduce Lokta-Volterra model, a differntial dynamics model, to build the competitive and cooperative mechanisms of heterogeneous networks. It considers the natural growth rate of the network i...

2007
Chen Li Jiayin Qi Huaying Shu

Using System Dynamics method, this study analyzes the SMS governance. A System Dynamics Model is built and is simulated with VENSIM PLE 5.4C. The simulation result proves that carries should be the key entity to be governed. This study also uses the model to analyze SMS policies and finally gets the conclusion that real mobile identification and unification the service providers’ access number ...

2010

This appendix describes a variety of software programs for system dynamics modeling. It begins with spreadsheet programs since these are probably the most widely recognized software. The appendix demonstrates that spreadsheets can be constructed to simulate behavior over time. But this is not their best use; spreadsheets are better used to support dynamic modeling in programs like Stella or Ven...

Journal: :JSW 2013
Ying Ma Fei Feng

Logistics runs through the entire process of an enterprise’s production and management. Logistics, as an enterprise’s "the third profit source", is an effective management tools for companies to obtain and maintain a competitive advantage, the management of logistics risk of marketing channels is a critical part of the risk management of channels. The paper introduces the logistics risk types, ...

2009
Jie Fan Guang-le Yan

The thesis analyzes the development problem of private cars’ amount in Beijing from the perspective of system dynamics. With the flow chart illustrating the relationships of relevant elements, the SD model is established by VENSIM to simulate the growth trend of private autos’ amount in the future on the background of “Public Transportation First” policy based on the original data in Beijing. T...

Journal: :Journal of Water Resource and Hydraulic Engineering 2015

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده عمران 1390

افزایش روزافزون نیازهای آبی، اهمیت مدیریت منابع آب را در حوضه های آبریز بیش از پیش نمایان ساخته است. رفتارحوضه های آبریز متأثر ازپارامترهایی همچون بارش، رواناب، پوشش برف، خصوصیات فیزیوگرافی، پوشش گیاهی، وجود سدها و مخازن، رودخانه ها و ... هستند که رفتار حوضه ها را تحت تأثیر قرار می دهند، برای شناسایی ارتباط دقیق این پارامترها با یکدیگر می توان روند تأثیرگذاری تک تک این پارامترها و همچنین همه آن...

2007
Yuanquan Li Jiayin Qi Huaying Shu

In this article, a new method is presented to research the mechanism of Customer Satisfaction (CS). Firstly, the research model of CS based on the TAM and ACSI is built. Secondly, some important correlation coefficients of research model can be got from the SEM method. Thirdly, with these correlation coefficients, the main functions of system dynamic model are built, and the evolution of the sy...

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