高分求教 ： 谁能够详细 解释aggregation ！！！！ 200 分 ！1

[elite2018]

高分求教 ： 谁能够详细 解释aggregation ！！！！ 200 分 ！1

[ArEoN]

Spatial Aggregation (SA) is a framework for organizing computations around image-like, analogue representations of physical processes in data interpretation and control tasks. It transforms a numerical input field (such as temperature throughout a room or wind velocity vectors sampled across the country) to successively higher-level descriptions by applying a small set of operators to each layer, given appropriate metrics, neighborhood relations, and equivalence relations.
Aggregation is the typical whole/part relationship. This is exactly the same as an association with the exception that instances cannot have cyclic aggregation relationships (i.e. a part cannot contain its whole).
[Example:]

|Node|<>-------->|Node|

class Node
{
private:
vector<Node*> itsNodes;
};
The fact that this is aggregation means that the instances of Node cannot form a cycle. Thus, this is a Tree of Nodes not a graph of Nodes.

[elite2018]

有无 中文 描述

[zag]

照着翻译一遍不就得了.

[elite2018]

I can't understand

[sbf2000]

aggregation（集团）：是一种特别的二元关联。属于UML术语。
如：[汽车]<>───[零件]
"<>"表示集团的聚合（aggregate）
普通情况下，聚合的多重性可以是任意整数。

如果部件是集团整体中不可分离的一部分，则该集团称为复合。如：圆和圆心是复合关系。