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LINEAR QUADTREE ALGORITHMS FOR TRANSPUTER ARRAY

IEE PROCEEDINGS-E COMPUTERS AND DIGITAL TECHNIQUES 1990年第1期137卷 114-128页

作者： MASON, DC Department of Geography NERC Unit for Thematic Information Systems University of Reading Reading UK

The quadtree is a hierarchical data model based upon a regular recursive decomposition of space, which has been found useful in such areas as image processing, computer graphics, cartography and spatial information systems. The linear quadtree is a pointerless representation of the quadtree. In the paper, a number of linear quadtree algorithms are presented for a transputer array. These form a largely complementary set to those developed by Bhaskaret al.[1] for a similar multiprocessor architecture. Emphasis is placed on algorithms which require the neighbours of quadtree leaves to be accessed. These include perimeter computation, connected component labelling and image dilation. A quadtree generation algorithm is also described. Timing estimates have been carried out using a transputer development system. A price to be paid for the speed increases achieved is an increase in the complexity of the multiprocessor algorithms.

关键词： multiprocessing systems perimeter computation regular recursive decomposition trees (mathematics) cartography image processing Computer architecture connected component labelling hierarchical data model parallel algorithms cellular arrays computer graphics transputer array complexity Programming and algorithm theory spatial information systems linear quadtree algorithms multiprocessor architecture

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dataBASE TRANSFORMATION, QUERY TRANSLATION, AND PERFORMANCE ANALYSIS OF A NEW dataBASE COMPUTER IN SUPPORTING hierarchical dataBASE-MANAGEMENT

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IEEE TRANSACTIONS ON SOFTWARE ENGINEERING 1980年第1期6卷 91-109页

作者： BANERJEE, J HSIAO, DK NG, FK Advanced Systems and Technology Sperry-Univac

database computers are special-purpose storage and processing devices which are intended to relieve the database management (software) systems running on the general-purpose computers and provide improved storage and processing capabilities (via hardware) for the existing and new database application. However, to support existing database applications, two steps must be followed. First, the existing database must be transformed into the storage format of the new database computer. This one-time tranformation, known as database transformation, is required to preserve the semantics of the database and to take advantage of the advanced hardware features of the new computer. Second, the database sublanguage used in the existing application programs must be supported in real time by the new database computer so that application programs may be executed in the new environment without the need of program conversion. Such real-time translation of sublanguage calls to the instructions of the new database computer, known as query translation, must be straightforward with minimal software support.

关键词： Transaction Execution Time Analysis database Computer database Management System database Transformation hierarchical data model Performance Evaluation Storage Analysis

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ArhiNet - A Knowledge-Based System for Creating, Processing and Retrieving Archival eContent 1

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5th International Conference on Web Information Systems and Technologies

作者： Salomie, Ioan Dinsoreanu, Mihaela Pop, Cristina Suciu, Sorin Tech Univ Cluj Napoca Dept Comp Sci Cluj Napoca 400020 Romania

ISBN: (数字)9783642124365

ISBN: (纸本)9783642124358

This paper addresses the problem of creating, processing and querying semantically enhanced eContent from archives and digital libraries. We present an analysis of the archival domain, resulting in the creation of an archival domain model and of a domain ontology core. Our system adds semantic mark-up to the historical documents content, thus enabling document and knowledge retrieval as response to natural language ontology-guided queries. The system functionality follows two main workflows: (i) semantically enhanced eContent generation and knowledge acquisition and (ii) knowledge processing and retrieval. Within the first workflow, the relevant domain information is extracted from documents written in natural languages, followed by semantic annotation and domain ontology population. In the second workflow, ontologically guided natural language queries trigger reasoning processes that provide relevant search results. The paper also discusses the transformation of the OWL domain ontology into a hierarchical data model, thus providing support for the efficient ontology processing.

关键词： Archival domain model and ontology Knowledge acquisition hierarchical data model Semantic annotation Ontology guided query Reasoning

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Fine Grained Key Computation Scheme for Secure data Sharing in Cloud 5

Fine Grained Key Computation Scheme for Secure Data Sharing ...

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International Conference on Advances in Computing, Communications and Informatics (ICACCI)

作者： Polson, Deepa Maria Sabitha, S. Rajasree, M. S. Coll Engn Dept Comp Sci & Engn Trivandrum Kerala India IIITMK Trivandrum Kerala India

ISBN: (纸本)9781509020287

data sharing is an important aspect of cloud storage. It is very imperative to ensure security during this sharing process. The basic idea of data security lies on encryption of data as well as delegation of decryption key. A data owner has to share the encrypted data as well as the decryption key of the corresponding data with another user, so that the latter can view the original data while maintaining the security of the data. This paper proposes a method of secure data sharing which is space and time efficient. In this method, data is encrypted based on a file identifier(id, which is an integer that ranges from 1 to a maximum number of branches in the hierarchical data model) and access policies. Access policies are represented using access tree structure. The key to be shared with the recipient provides fine-grained access to the files based on attributes of the recipient. This key is computed based on id and attributes of the user.

关键词： hierarchical data model Aggregate Key Secure data Sharing Cloud Storage Access Policies

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Robust Facial Feature Localization using data-Driven Semi-supervised Learning Approach 10th

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10th International Conference on Computer Vision Systems (ICVS)

作者： Kim, Yoon Young Hong, Sung Jin Rhee, Ji Hye Nam, Mi Young Rhee, Phill Kyu Inha Univ Dept Comp Sci & Engn Inchon South Korea Yonsei Univ Dept Comp Sci Seoul 120749 South Korea YM Naeultech Inchon South Korea

ISBN: (纸本)9783319209043;9783319209036

In this paper, we present a novel localization method of facial feature points with generalization ability based on a data-driven semi-supervised learning approach. Even though a powerful facial feature detector can be built using a number of human-annotated training data, the collection process is time-consuming and very often impractical due to the high cost and error-prone process of manual annotations. The proposed method takes advantage of a data-driven semi-supervised learning that optimizes a hybrid detector by interacting with a hierarchical data model to suppress and regularize noisy outliers. The competitive performance comparing to other state-of-the-art technology is also shown using benchmark datasets, Bosprous, BioID.

关键词： Facial feature localization Hybrid detector hierarchical data model Hirerarchical soft K-means algorithm data-driven semi-supervised learning

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The design and implementation of a hierarchical interface for the multi-lingual database system

The design and implementation of a hierarchical interface fo...

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作者： Benson, Timothy P. Naval Postgraduate School

学位级别：硕士

Traditionally, the design and implementation of a conventional database system begins with the selection of a data model, followed by the specification of a model- based data language. An alternative to this traditional approach to database system development is the multilingual database system (MLDS). This alternative approach affords the user the ability to access and manage a large collection of databases via several data models and their corresponding data languages. In this thesis we present the specification and implementation of a hierarchical /DL/ language interface for the MLDS. Specifically, we present the specification and implementation of an interface which translates DL/I data language calls into attribute-based data language (ABDL) requests. We describe the software engineering aspects of our implementation and an overview of the four modules which comprise our DL/I language interface.

关键词： Multi-lingual database System (MLDS) Multi-backend database System (MBDS) hierarchical data model data Language I (DL/I) Attribute=based data Language (ABDL) Language Interface Information Management System (IMS)

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The Covering Property of the Object-Oriented data model Design and Implementation Issues

The Covering Property of the Object-Oriented Data Model Desi...

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作者： Todd Gregory Estes Eric Martin Mueller Naval Postgraduate School

学位级别：硕士

Inheritance is a necessary condition for construction of an object-oriented data model (OODM), but it is not sufficient. This is because inheritance applies to only one hierarchy. The covering construct meets this deficiency because covering maps an object in one hierarchy to a class of objects in another hierarchy. To date, covering has not been implemented into an existing OODM application. This thesis implements the covering construct into a functioning object-oriented database environment. Implementation was achieved through modification of data constructs and the creation of a user-defined relation linking two or more hierarchies. Using the Multi-model Multi-lingual Dababase Supercomputer (MDBS), a sample, working application is described illustrating real world applications. The results of this thesis show that the covering property can be implemented into an existing OODM without sacrificing the integrity of the data model. The cross-hierarchical mapping afforded by covering is a powerful construct that expands the capabilities of the model beyond pure inheritance. This makes the OODM suitable for a far wider range of applications. Together, inheritance and crovering meet the necessary and sufficient conditions of the OODM.

关键词： Object-oriented object-oriented data model covering aggregation inheritance hierarchical data model

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