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sub-system [2014/06/09 13:01]
127.0.0.1 external edit
sub-system [2015/08/13 15:22]
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-Sub-systems are containers for blocks and are used to make large models more manageable and understandable. The sub-system also acts as a name space for the [[block|blocks]] that it contains, which means that it will determine the ID of the blocks and guarantee that there are never two blocks inside the same sub-system with the same name. Finally, sub-systems can communicate with other sub-systems through the use of [[connector|connectors]]. 
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-As sub-system can contain other sub-systems hierarchies of sub-systems can be created. 
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-The top level sub-system is called the //root// sub-system. When a sub-system contains another sub-system, it is said to be the //parent// of that sub-system. 
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-====Group==== 
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-A group is a simplified form of sub-systems,​ used only for organising blocks. A group does not influence the [[ID]] of a [[block]]. 
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-====Inputs and outputs==== 
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-A sub-system is considered an (in most cases) independant model component. However, it can communicate with other sub-systems. Blocks in a sub-system can be marked as outputs, which make them available to other sub-system. Likewise, blocks can be marked as inputs, which means that they can be calculated by other sub-systems. 
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-Example: ​ 
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-  * A sub-system for contaminated soil might have a [[lookup table]] which represents contaminant concentrations in air. By specifying that the lookup table is an //input//, the concentration in air can be calculated by another sub-system. ​ 
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-  * Another sub-system, called atmosphere, calculates a concentration in air. It is marked as an output, which makes it possible to use it as an input the soil sub-system. ​ 
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-Sub-systems are connected by using [[connector]] blocks. In the [[model screen#​graph]],​ connectors are represented as arrows, in the [[model screen#​interaction matrix]] connectors are put in off-diagonal cells. A connector lists all the available //outputs// of the source sub-system and to which //inputs// in the target sub-system they are paired with.  
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-When an output has been connected to an input, it "​disappears"​ from the [[user interface#​data input screens|input screens]]. ​ 
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-In some cases, an input allows connections from more than one output. The input then receives the sum of the connected outputs. 
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-Read more about connecting models in the section [[assembling a model]]. 
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-====Matrix and graph==== 
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-A sub-system in the [[model screen#​interaction matrix]] is put in the diagonal. In the both the [[[[model screen#​interaction matrix]] and in the [[model screen#​graph]] a sub-system can be expanded (opened) by clicking the **+** button located in the upper corner of the box.  
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-====See also==== 
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-  * [[Assembling a model]] 
-  * [[Library]] 
  
sub-system.txt ยท Last modified: 2015/08/13 15:22 (external edit)