请选择 进入手机版 | 继续访问电脑版

CCOSE论坛

 找回密码
 立即注册
查看: 825|回复: 3

很牛的 Vensim 建模软件介绍

[复制链接]

421

主题

610

帖子

2280

积分

论坛元老

Rank: 7Rank: 7Rank: 7

积分
2280
发表于 2019-1-17 07:49:38 | 显示全部楼层 |阅读模式



Vensim是由美国Ventana Systems, Inc.所开发,为一可观念化、文件化、模拟、分析、与最佳化动态系统模型之图形接口软件。


外文名vensim国    家美国开发人Ventana Systems, Inc.类    型图形接口软件
目录




简介[url=]编辑[/url]
Vensim可提供一种简易而具有弹性的方式,以建立包括因果循环(casual loop)、存货(stock)与流程图等相关模型。
使用Vensim建立动态模型,我们只要用图形化的各式箭头记号连接各式变量记号,并将各变量之间的关系以适当方式写入模型,各变量之间的因果关系便随之记录完成。而各变量、参数间之数量关系以方程式功能写入模型。透过建立模型的过程,我们可以了解变量间的因果关系与回路,并可透过程序中的特殊功能了解各变量的输入与输出间的关系,便于使用者了解模型架构,也便于模型建立者修改模型的内容。
Vensim PLE即Vensim系统动力学模拟环境个人学习版,是Vensim软件的一种,是为了更便于学习系统动力学而设计的。

主要特点[url=]编辑[/url]
VensimPLE主要有以下几个特点:
1.利用图示化编程建立模型。
Vensim的用户界面是标准的Windows应用程序界面,除支持菜单和快捷键外,还提供多个工具条或图标,这使用户使用非常方便。在Vensim中,“编辑”实际上并不存在,只有建模的概念。只要在启动VensimPLE系统后得到的主窗口中,依据操作按钮(画图工具)画出简化流率基本流图,再通过Equation Editor输入方程和参数,就可以直接进行模拟了。在Vensim中,方程及变量不带时标,模型建立是围绕着变量间的因果关系展开。
2.对模型提供多种分析方法。
VENSIM所提供的分析工具可以分为两类:一类是结构分析工具,如cause tree功能可以将所有工作变量之间的因果关系用树状的图形形式表示出来;loops功能可以将模型中所有反馈环以列表的形式表示出来。另一类是数据集分析工具,如graph功能可以将各变量在整个模拟周期内的数值以图形的形式直观的给出,causes strip graph功能则将有直接因果关系的工作变量在模拟周期内的数值变化并列出来,以追踪系统变量间的影响关系。
3.真实性检验
对于我们所研究的系统,对于模型中的一些重要变量,依据常识和一些基本原则,我们可以预先提出对其正确性的基本要求,这些假设是真实性约束。将这些约束加到建好的模型中,专门模拟现有模型在运行时对这些约束的遵守情况或违反情况,就可以判断模型的合理性和真实性,从而调整结构或参数。真实性检验是Ventana公司的专利方法,是一种非常有效的建模工具。


https://vensim.com
回复

使用道具 举报

421

主题

610

帖子

2280

积分

论坛元老

Rank: 7Rank: 7Rank: 7

积分
2280
 楼主| 发表于 2019-1-17 07:51:08 | 显示全部楼层



Industrial strength simulation software for improving the performance of real systems. Vensim's rich feature set emphasizes model quality, connections to data, flexible distribution, and advanced algorithms. Configurations for everyone from students to professionals.

Vensim Video Library
  • [color=rgb(52, 101, 153) !important]Vensim 7 Synthesim + Sensitivity https://vimeo.com/223688311 In Vensim 7, we’ve combined real-time Synthesim with sensitivity analysis, so you can see the distribution of outcomes from Monte Carlo runs interactively. This is great for giving users an appreciation of the risk associated with a decision, rather than just a best guess.
  • [color=rgb(52, 101, 153) !important]Data Science, Connected to the Bottom Line  [color=rgb(52, 101, 153) !important]https://vimeo.com/206297867/1d77447143 Vensim can be used to put big data in context, by incorporating the learnings from big data in simulations that account for organizational structure and finances. Vensim can also do data intensive simulation, with flexible I/O, advanced algorithms for calibration, optimal filtering, confidence bounds and Monte Carlo simulation.
  • [color=rgb(52, 101, 153) !important]Modeling Discrete & Stochastic Events It’s generally a good idea to begin thinking about your models with continuous time and quantities, particularly for strategic applications where you care about the big picture. But there are times when it matters that quantities are discrete – you can’t ride half a horse. Here’s a quick look at modeling such situations, starting with ...
  • [color=rgb(52, 101, 153) !important]Vensim Causal Loop Diagramming This video shows several ways to build causal loop diagrams in Vensim. We start simple with Vensim PLE, and then illustrate some additional features, like navigation links, that are possible in DSS. The first ten minutes should have you up & running on the basics. https://vimeo.com/179249938
  • [color=rgb(52, 101, 153) !important]Model Analysis – World Dynamics This video walks through a critique of the World model that kicked off the Limits to Growth debate, starting with Forrester’s World Dynamics, followed by World3 and the Limits to Growth and many subsequent works. The purpose of this video is not to discuss the mapping of the world models to the real world, though that ...
  • [color=rgb(52, 101, 153) !important]Vensim’s new partner – Ventity  [color=rgb(52, 101, 153) !important]Ventity has launched! Visit us at Ventity.biz. https://vimeo.com/190327940
  • [color=rgb(52, 101, 153) !important]Running models with Vensim PLE and the Model Reader  [color=rgb(52, 101, 153) !important]A brief tutorial on running models with Vensim PLE and the Vensim Model Reader.
  • [color=rgb(52, 101, 153) !important]Causal Tracing in Vensim  [color=rgb(52, 101, 153) !important]A tutorial on Causal Tracing™ – following the chain of causality through a model for insight and debugging.
  • [color=rgb(52, 101, 153) !important]Lookups in Vensim  [color=rgb(52, 101, 153) !important]A tutorial on building and using lookups (table functions) in Vensim models.
  • [color=rgb(52, 101, 153) !important]Building a Simple Vensim Model  [color=rgb(52, 101, 153) !important]A quick tutorial on building and running a new Vensim model.



回复 支持 反对

使用道具 举报

421

主题

610

帖子

2280

积分

论坛元老

Rank: 7Rank: 7Rank: 7

积分
2280
 楼主| 发表于 2019-1-17 07:53:00 | 显示全部楼层
Free Downloads
Contents
Current version: 7.3
Return to the McGraw-Hill Business Dynamics page (if you came from there!)
Current version: 7.3
Vensim PLE is free for personal or educational use and for limited time evaluation. Commercial or government use requires purchase of a license.
The Vensim Model Reader may be distributed for free with your models (including commercial use).
When you’re done downloading, check out our new getting-started videos, Building a Simple Vensim Model and Running models with Vensim PLE and the Model Reader.
This system is automated. If you do not receive an email, it’s probably due to one of the following reasons.
You entered your email address incorrectly.
It was delivered, but is in your spam/bulk email folder.
Our emails are being blocked by your servers. You will need to contact your IT administrator or ISP to fix this, we cannot help.
You did not tick the box below titled “please tick this box”.
Browser issues. Try a different browser.
If you have problems, start by checking the FAQ (there is a link to this at the top of the page). If the FAQ does not help, click the “Contact us” link at the top of this page, there is a section titled “If you need help or technical support”, follow the instructions for PLE users.
Choose a Product and Platform:

Anti-spam        Please tick this box
Product        Vensim PLE
Model Reader
Platform        Windows (XP/Vista/7/8/8.1/10)
Macintosh OSX (10.9+)
Vensim newsletter        Subscribe
Name
PLEASE NOTE: DOWNLOAD INSTRUCTIONS WILL BE EMAILED TO YOU, YOU MUST PROVIDE A VALID EMAIL ADDRESS.
AT PRESENT, EMAILS TO HOTMAIL AND OUTLOOK DOMAINS ARE BEING BOUNCED BACK, PLEASE USE A DIFFERENT EMAIL ADDRESS IF POSSIBLE.
Email address

Retype email address
The Vensim newsletter is used for announcements of software updates, courses, and related information. Frequency is low – typically quarterly – and addresses are never shared.



Notes :

Use of the Vensim software is subject to the terms of a license agreement. For commercial and advanced configurations, see Downloads.

The molecules are now installed as part of the help system. Depending on operating system, the path to the molecules will be similar to

\Users\Public\Vensim\Help\Models\Molecules

If you have a version of Vensim prior to 5.11 and want the molecules, links to download these are below.

PC Version
Mac Version

If you would like to receive news about new Vensim releases and other activities, please subscribe to our mailing list.

If you have difficulties and cannot download the Vensim software, please send email to vensim@vensim.com

Return to the McGraw-Hill Business Dynamics page (if you came from there!)
回复 支持 反对

使用道具 举报

421

主题

610

帖子

2280

积分

论坛元老

Rank: 7Rank: 7Rank: 7

积分
2280
 楼主| 发表于 2019-1-17 07:53:22 | 显示全部楼层
Free DownloadsContents

Current version: 7.3
  • Vensim PLE is free for personal or educational use and for limited time evaluation. [color=rgb(52, 101, 153) !important]Commercial or government use requires purchase of a license.
  • The Vensim Model Reader may be distributed for free with your models (including commercial use).
  • When you’re done downloading, check out our new getting-started videos, [color=rgb(52, 101, 153) !important]Building a Simple Vensim Model and [color=rgb(52, 101, 153) !important]Running models with Vensim PLE and the Model Reader.
  • This system is automated. If you do not receive an email, it’s probably due to one of the following reasons.
    • You entered your email address incorrectly.
    • It was delivered, but is in your spam/bulk email folder.
    • Our emails are being blocked by your servers. You will need to contact your IT administrator or ISP to fix this, we cannot help.
    • You did not tick the box below titled “please tick this box”.
    • Browser issues. Try a different browser.
  • If you have problems, start by checking the FAQ (there is a link to this at the top of the page). If the FAQ does not help, click the “Contact us” link at the top of this page, there is a section titled “If you need help or technical support”, follow the instructions for PLE users.
[size=1em]Choose a Product and Platform:
Anti-spam
Please tick this box
Product
Vensim PLE
Model Reader
Platform
Windows (XP/Vista/7/8/8.1/10)
Macintosh OSX (10.9+)
Vensim newsletter
Subscribe
Name
PLEASE NOTE: DOWNLOAD INSTRUCTIONS WILL BE EMAILED TO YOU, YOU MUST PROVIDE A VALID EMAIL ADDRESS.
AT PRESENT, EMAILS TO HOTMAIL AND OUTLOOK DOMAINS ARE BEING BOUNCED BACK, PLEASE USE A DIFFERENT EMAIL ADDRESS IF POSSIBLE.

Email address

Retype email address
The Vensim newsletter is used for announcements of software updates, courses, and related information. Frequency is low – typically quarterly – and addresses are never shared.
[size=1em]
[size=1em]Notes :
[size=1em]Use of the Vensim software is subject to the terms of a [color=rgb(52, 101, 153) !important]license agreement. For commercial and advanced configurations, see [color=rgb(52, 101, 153) !important]Downloads.
[size=1em]The molecules are now installed as part of the help system. Depending on operating system, the path to the molecules will be similar to
[size=1em]\Users\Public\Vensim\Help\Models\Molecules
[size=1em]If you have a version of Vensim prior to 5.11 and want the molecules, links to download these are below.
[size=1em][color=rgb(52, 101, 153) !important]PC Version
[color=rgb(52, 101, 153) !important]Mac Version
[size=1em]If you would like to receive news about new Vensim releases and other activities, please subscribe to our [color=rgb(52, 101, 153) !important]mailing list.
[size=1em]If you have difficulties and cannot download the Vensim software, please send email to [color=rgb(52, 101, 153) !important]vensim@vensim.com
Return to the [color=rgb(52, 101, 153) !important]McGraw-Hill Business Dynamics page (if you came from there!)
回复 支持 反对

使用道具 举报

您需要登录后才可以回帖 登录 | 立即注册

本版积分规则

QQ|京ICP备17005959号|IAC-16|Archiver|手机版|小黑屋|CCOSE论坛

GMT+8, 2020-4-7 04:54 , Processed in 0.045018 second(s), 20 queries .

快速回复 返回顶部 返回列表