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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
281

The implementation of ACT++ on a shared memory multiprocessor

Mukherji, Manibrata 23 December 2009 (has links)
Master of Science
282

Automatic generation of a view to geographical database

Dunkars, Mats January 2001 (has links)
This thesis concerns object oriented modelling and automatic generalisation of geographic information. The focus however is not on traditional paper maps, but on screen maps that are automatically generated from a geographical database. Object oriented modelling is used to design screen maps that are equipped with methods that automatically extracts information from a geographical database, generalises the information and displays it on a screen. The thesis consists of three parts: a theoretical background, an object oriented model that incorporates automatic generalisation of geographic information and a case study where parts of the model have been implemented. An object oriented model is an abstraction of reality for a certain purpose. The theoretical background describes different aspects that have impact on how an object oriented model shall be designed for automatic generalisation. The following topics are described: category theory, the human ability to recognise visual patterns, previous work in automatic cartographic generalisation, and object oriented modelling. A view is here defined to consist of several static levels, or maps, defined at different resolutions. As the user zooms the level that is appropriate for the particular resolution is shown. An object class belongs to one and only one level and has a certain symbolisation. The automatic creation of new objects in a level is discussed as well as the relation between objects in different levels. To preserve topological relations between objects in a level a network structure is formed between all linear objects in a level and objects that might cause conflicts are modelled using dependencies. The model is designed for a set of typical geographical object classes such as road, railroad, lake, river, stream, building, built-up area etc. The model is designed to handle information in a scale-range from 1:10 000 to 1:100 000. The model has been implemented for a subset of these classes and tested for an area covering approximatley 60 km2. / <p>NR 20140805</p>
283

Developing An Object-oriented Approach For Operations Simulation In Speedes

Wasadikar, Amit 01 January 2005 (has links)
Using simulation techniques, performance of any proposed system can be tested for different scenarios with a generated model. However, it is difficult to rapidly create simulation models that will accurately represent the complexity of the system. In recent years, Object-Oriented Discrete-Event Simulation has emerged as the potential technology to implement rapid simulation schemes. A number of software based on programming languages like C++ and Java are available for carrying out Object Oriented Discrete-Event Simulation. These software packages establish a general framework for simulation in computer programs, but need to be further customized for desired end-use applications. In this thesis, a generic simulation library is created for the distributed Synchronous Parallel Environment for Emulation and Discrete-Event Simulation (SPEEDES). This library offers classes to model the functionality of servers, processes, resources, transporters, and decisions. The library is expected to produce efficient simulation models in less time and with a lesser amount of coding. The class hierarchy is modeled using the Unified Modeling Language (UML). To test the library, the existing SPEEDES Space Shuttle Model is enhanced and recreated. This enhanced model is successfully validated against the original Arena model.
284

Development of Finite Element Modeling Mesh Generation and Analysis Software for Light Wood Frame Houses

Pathak, Rakesh 03 February 2005 (has links)
This thesis presents the development of an automatic mesh generator, named WoodFrameMesh, using object oriented C++. The program developed is capable of generating complete finite element models of wooden houses incorporating frames, linear links, springs, nodal loads and restraints at the desired locations. The finite element mesh generated by the program may be triangular or quadrilateral. The triangular mesh can be generated over any arbitrary domain with multiple openings and line constraints. The program implements the advancing front method for triangulation as discussed by Lee and Hobbs. The difference is made by implementing the algorithm using object oriented concepts and the extensive use of the powerful C++ Standard Template Library (STL). Quadrilateral mesh generation is limited to simple quadrilateral domains with no openings or constraint lines. A simple structured technique is implemented to generate the quadrilateral mesh. The amount of time spent in manual generation of the complete finite element model of wooden houses has been considerably reduced by automating the modeling process. Overall, the use of object oriented design has facilitated the code development and has provided a platform for further additions. The program relies on the use of STL as it provides dynamic data structures, algorithms for storage, searching, sorting, etc. Efficiency of the program is improved by the use of the in-built features in STL instead of developing new code. Analysis of the finite element models generated by the automatic mesh generator is performed using SAP 2000 and WoodFrameSolver. WoodFrameSolver is a finite element analysis engine for WoodFrameMesh, which was developed at Virginia Tech by a group of graduate students (including the author) and professors as a separate project. A chapter discussing the WoodFrameSolver architecture, its extensibility features and its verification is also presented in this thesis. The solver performance and accuracy are similar to those of SAP 2000, which was chosen as the benchmark for testing the analysis results. / Master of Science
285

On integration of object-oriented features with deductive data language

Lou, Yanjun January 1992 (has links)
No description available.
286

AN OBJECT ORIENTED FRAMEWORK FOR BITSTREAM GENERATION FOR MULTI-TECHNOLOGY FPGA CHIPS

BEMALKHEDKAR, KALYAN 13 July 2005 (has links)
No description available.
287

Object-oriented representation and analysis of coastal changes for hurricane-induced damage assessment

Wu, Qiusheng 26 September 2011 (has links)
No description available.
288

An object-oriented knowledge-based system for hydroelectric power plant turbine selection

Andrade, Dagmar Luz de January 1992 (has links)
No description available.
289

An open source object oriented platform for rapid design of high performance path following interior-point methods

Chiş, Voicu January 2008 (has links)
<p> Interior point methods (IPMs) is a powerful tool in convex optimization. From the theoretical point of view, the convex set of feasible solutions is represented by a so-called barrier functional and the only information required by the algorithms is the evaluation of the barrier, its gradient and Hessian. As a result, IPM algorithms can be used for many types of convex problems and their theoretical performance depends on the properties of the barrier. In practice, performance depends on how the data structure is exploited at the linear algebra level. In this thesis, we make use of the object-oriented paradigm supported by C++ to create a platform where the aforementioned generality of IPM algorithms is valued and the possibility to exploit the data structure is available. We will illustrate the power of such an approach on optimization problems arrising in the field of Radiation Therapy, in particular Intensity Modulated Radiation Therapy. </p> / Thesis / Master of Science (MSc)
290

DMAS:A Display Measurement and Analysis System with an object-oriented database

Qian, Yihong 11 June 2009 (has links)
Current commercial measurement systems are used primarily for performing measurements and recording data. Measurement users either expend extra effort to store and maintain other measurement information (metadata) or to customize the measurement system to make it functionally complete. A software measurement environment using advanced data management techniques in an open architecture seems highly desirable. To create such an environment, a Display Measurement and Analysis System (DMAS) was designed and constructed using the object-oriented paradigm and object-oriented database (OODB) management techniques. The purpose of the system is to serve as a testbed for new generation measurement systems and for overcoming the limitations of conventional systems. This thesis proposes a new object data model for display measurement and analysis applications. The components of this data model are object classes. The generation of the data model involved four steps, dealing with: objects and classes at given level of abstractions, semantics, and relationships. A prototype system based on the above model has been developed. It used an object data management system as the support of persistent object storage. The development of DMAS database management subsystem consists of construction of an object schema and an object management interface. The research work illustrates that the OODB approach facilitates scientific measurement by capturing metadata and data together explicitly and flexibly. Furthermore, it show thats OODB has the ability to represent complex semantics, to associate objects with metadata, and to map a lucid interface easily to objects. / Master of Science

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