Association indicates the relationship between objects. Generalization, Specialization and Aggregation in ER model are used for data abstraction in which abstraction mechanism is used to hide details of a set of objects. Aggregation is a special case of association. Composition. In composition, if the parent object is destroyed, then the child objects also cease to exist. So the challenge for this learning task is to simultaneously describe the geometric and semantic properties of objects or a scene. Some places say that an aggregate is almost exactly the same as composition except for aggregation does not control its contained objects life-cycle. Data aggregation may be performed manually or through specialized software. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. Composition is a specialized form of aggregation. The aggregation-layer submodule plays a pivotal role in providing a highly reliable, scalable “middle layer” for bringing together the traffic from the access-layer submodule, while at the same time ensuring the optimal use of physical resources. Generalization – Generalization is the process of extracting common properties from a set of entities and create a generalized entity from it. The difference is typically expressed as the difference between "is a" and "has a". Computer science and telecommunication. eg: Computer uses keyboard as input device. Code reuse is best achieved by aggregation. Stephen R. Smoot, Nam K. Tan, in Private Cloud Computing, 2012. The whole may not have a part, or it may have a different part at different times. By reference de-couples the lifetimes of the two objects. Computer Science Division Univ ersit y of California, Berk eley jmh@cs.b erk ele y.ed u P eter J. Haas Almaden Researc h Cen ter IBM Researc h Division p eterh@almad en. Aggregation-layer submodule. I have been trying to freshen up on my programming terminology and the term aggregate is extremely confusing to me. Different wholes may share the same part. In this dense prediction task, the parsing model assigns every pixel to a categorical label, which requires the contextual information of adjacent image patches. Scene parsing from images is a fundamental yet challenging problem in visual content understanding. De-allocating the … Consider the differences and similarities between the classes of the following objects: pets, dogs, tails, owners. An association is used when one object wants another object to perform a service for it. Composition. When do we use Aggregation ?? What is the true meaning of an aggregate in computer science? Aggregation by value cannot be cyclic: one object is the whole, one the part. A Computer Science portal for geeks. Aggregate function, a type of function in data processing; Aggregation, a form of object composition in object-oriented programming; Link aggregation, using multiple Ethernet network cables/ports in parallel to increase link speed; Packet aggregation, joining multiple data packets for transmission as a single unit to increase network efficiency *Response times vary by subject and question complexity. Composition in object oriented programming. A directional association between objects. Data aggregation is a type of data and information mining process where data is searched, gathered and presented in a report-based, summarized format to achieve specific business objectives or processes and/or conduct human analysis. Median response time is 34 minutes and may be longer for new subjects. From images is a fundamental yet challenging problem in visual content understanding median Response time is 34 and... … Stephen R. Smoot, Nam K. Tan, in Private Cloud Computing, 2012 Response! 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