Wyniki wyszukiwania - BazTech

1

Modelowanie strukturalne : definicje notacja techniki i narzędzia

Olczyk D.

Zeszyty Naukowe Warszawskiej Wyższej Szkoły Informatyki

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2010

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nr 4

87--98

PL

W artykule wyróżnione zostały dwa zasadnicze podejścia do analizy i modelowania wykorzystywane obecnie w procesie budowy systemów informatycznych: strukturalne oraz obiektowe. Myśl przewodnia to próba odpowiedzi na pytania dotyczące istoty stosowania podejścia strukturalnego, wyjaśnienia podstawowych pojęć stosowanych w praktyce oraz przybliżenia notacji wbudowanych w różnego rodzaju narzędzia wspomagające proces projektowania systemów. Zasadnicza część artykułu zawiera szczegółowe informacje nt. sposobów tworzenia diagramów FHD, DFD oraz ERD.

EN

The article highlights two basic approaches to analysis and modeling currently used in the information systems development: structural and object-oriented. The keynote is an attempt to answer questions about the substance of the structural approach and to clarify key concepts applied in practice as well as to familiarize with notations embedded in different types of tools supporting the process of system design. The main part of the article provides detailed information about the ways of FHD, ERD and DFD diagrams creation.

2

Rekonstrukcja wirtualna obiektów architektonicznych

Ozimek P.

Roczniki Geomatyki

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2007

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T. 5, z. 8

173-185

EN

Virtual reconstruction of building objects is made in order to recreate the appearance of non-existing objects or to make digital copies of items currently existing. These goals are realized making use of different data types and various three-dimensional digital representation of spatial objects. In general, representation of solids is orientated towards design, while measuring data model is orientated towards the way the world is perceived by devices and measuring techniques. This divergence results in obvious problems with compatibility. A possible solution is to equip both data models with representations that bring them together to enable direct mapping of world perception into the spatial model representation. In this paper modeling techniques of three-dimensional architectural (building) objects are presented, as well as available 3D objects representations and data sets possible to be visualized making use of these techniques. Moreover, an attempt is made to determine fields of research aimed at bringing together the two data models mentioned above.

3

Contemporary problems connected with incuding Standard for the Exchange of Product Model Data (ISO 10303-STEP) in designing ontology using UML and XML

Skarka W.

Computer Assisted Mechanics and Engineering Sciences

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2005

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Vol. 12, No. 2-3

231-246

EN

Standard for the Exchange of Product Model Data (STEP-ISO 10303) contains product information models covering most of the aspects of product lifecycle management (PLM). In designing ontology of knowledge base concerning any aspects of PLM it is necessary to use such product information models. Unfortunately, a model based on STEP is based on Express language which is not compatible with common technologies for ontology creation. The paper presents contemporary methods of ontology description and it describes as well as current level of advancement in development of STEP standard. Attention has been paid to drawbacks in possibilities of already existing methods, included in STEP for ontology creation, which could form a foundation for knowledge base designing methodology founded on the defined ontologies. A method of ontology creation has been proposed, including STEP model and examles of this method application in knowledge base implementation have been given.

4

Zastosowanie języka UML w tworzeniu SIP dla oceny podatności wód podziemnych na zanieczyszczenia

Rudowicz-Nawrocka J.

Roczniki Geomatyki

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2004

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T. 2, z. 2

227-233

EN

In order to create high-quality software, software engineering recommends drawing up models of reality in accordance with the object-oriented modelling and using Unified Modeling Language (UML) for recording these models. Object-oriented modelling and UML are established as basis for geographic information systems (GIS) modelling. Selected aspects of GIS modelling for evaluation of groundwater susceptibility to impurities were presented in this paper. Examples of case diagrams and an activity diagram show the behaviour of the system being created from different architectural views and confirm that by using UML diagrams the system.s abilities may be presented in an easy and unambiguous way . Moreover, models prepared in this way may be used in building similar projects by every water or environment management organization, what is consistent with assumptions of objectoriented modelling.

5

Ocena wykorzystania wzorców projektowych w tworzeniu systemów informacji przestrzennej

Rudowicz-Nawrocka J.

Roczniki Geomatyki

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2004

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T. 2, z. 2

156-159

EN

In this article the concept of design patterns and their using were discussed. Special usefulness of patterns in order to improve integration and possibilities of reusing GIS projects and models and to improve quality of software were stressed. Example of analysis pattern, which can be redused in different geospatial application, was presented. The lack of commonly using patterns by designers and the need of defining unambiguous structure patterns catalogue were stated.

6

Object-oriented approach to modelling electrical network for GIS

Helt P., Frączek L.

Journal of Applied Computer Science

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2002

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Vol. 10, nr 1

67-75

EN

GIS allows performing different analysis, even using data from other areas, such as demographic data. The bases of GIS are maps graphical representation of real world. Model of electrical network, based on object - oriented approach, is proposed in this paper. Relations between objects - elements of electrical network were taking into account. Presented model is oriented for medium/low voltage network, which is operated by power distributions companies. Basic functions of GIS systems in power distribution companies, which should be taken into account, are described. Some simplifications of the model go to rapid GIS implementation. Methods of data acquisition are shortly described. as an illustration of model implementation.

7

Deriving and retrieving contextual categorical information through instance inheritance

Analyti A., Spyratos N., Constantopoulos P.

Fundamenta Informaticae

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2000

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Vol. 44, Nr 4

321-351

EN

In semantic and object-oriented data models, each class has one or more typing properties that associate it to other classes, and carry type information about all instances of the class. We introduce a new kind of property that we call instance-typing property. An instance-typing property associates an instance of a class to another class, and carries type information about that particular instance (and not about all instances of the class). Instance-typing properties are important as they allow to represent summary information about an instance, in addition to specific information. In this paper, we study inheritance of properties from a class to an instance, using type information about the class, as well as type information about the instance. This kind of inheritance, that we call contextual instance-inheritance, provides us with the most specific type information about the instance, in a particular context. Intuitively, a context is a metaclass of interest with respect to which this most specific information is determined. We demonstrate that contextual instance-inheritance is a powerful conceptual modeling mechanism, capable of expressing valuable information about instances. We also provide a framework in which derived instance-inherited properties can be represented and retrieved in the same way as "usual" properties.