Filters








3,630 Hits in 5.3 sec

The Evolution of the Computerized Database [article]

Nancy Hartline Bercich
2003 arXiv   pre-print
An appendix of diagrams, including hierarchical occurrence tree, network schema, ER (entity relationship) and UML (unified modeling language) diagrams, is included to support the text.  ...  It traces the evolution of the database, from its start as a non-computerized set of related data, to the, now standard, computerized RDBMS (relational database management system).  ...  Creating and maintaining flat files under these conditions is also inexpensive when compared to the cost of creating and maintaining a DBMS file system.  ... 
arXiv:cs/0305038v1 fatcat:5u4sjgplavazxbhkxmyojbm3jy

Text Data Mining Algorithm Combining CNN and DBM Models

Rong Dai, Sang-Bing Tsai
2021 Mobile Information Systems  
It can realize the tag tree by constructing the tag tree and design the effective hierarchical network to achieve classification.  ...  The special text has a lot of features, such as professional words, abbreviations, large datasets, different themes, and uneven distribution of labels.  ...  . e ROC curve is a comprehensive indicator of continuous variables of sensitivity and specificity.  ... 
doi:10.1155/2021/2150488 fatcat:l5x5qh4itvgcpb7lloq2q3uqky

Re-engineering relational databases

Abdelsalam Maatuk, M. Akhtar Ali, Nick Rossiter
2011 Proceedings of the 2011 International Conference on Intelligent Semantic Web-Services and Applications - ISWSA '11  
This paper surveys the recent literature about various research trends relevant to Relational DataBase (RDB) reengineering.  ...  The paper presents an analysis of approaches and techniques used in this context, including construction of object views on top of RDBs, database integration and database migration.  ...  This graph, similar to an ER diagram is used for identifying relationships and cardinalities.  ... 
doi:10.1145/1980822.1980839 dblp:conf/iswsa/MaatukAR11 fatcat:zi7kqzk2ebap5hmtysnl6pinye

A tour through the visualization zoo

Jeffrey Heer, Michael Bostock, Vadim Ogievetsky
2010 Communications of the ACM  
One of- ten needs to compare a large number of time series simultaneously and can choose from a number of visualizations to do so. Index Charts.  ...  Arc Diagrams. An arc diagram, shown in Figure 5b , uses a one-dimensional layout of nodes, with circular arcs to represent links.  ...  The seriation problem applies just as much to the matrix view, shown in Figure 5c , as to the arc diagram, so the order of rows and columns is important: here we use the groupings generated by a community-detection  ... 
doi:10.1145/1743546.1743567 fatcat:u2ytnhhylfhnnkg245cx25lgoi

A Discovery Method for Hierarchical Software Execution Behavior Models Based on Components

Yahui Tang, Tong Li, Rui Zhu, Fei Du, Jishu Wang, Zifei Ma
2021 Scientific Programming  
The nested call relationship between methods during the execution of software is common, but most process-mining methods are unable to discover them, only generating flat models with low fitness.  ...  ; meanwhile, the proposed method partitions the discovery model into several parts by component information to improve the comprehensibility of the model, which can also reflect the interaction behavior  ...  be considered to improve the comprehension of a model, and (c) compared with choice and loop, some methods cannot discover concurrency.  ... 
doi:10.1155/2021/4788357 doaj:b48a5f5ddbb94963936bab5db0794757 fatcat:xh3memhn3zcazjk2yxdagu7omu

Construction of Earthquake Rescue Model Based on Hierarchical Voronoi Diagram

Shenrun Pan, Manzhi Li
2020 Mathematical Problems in Engineering  
In this paper, the hierarchical Voronoi diagram is applied to the earthquake rescue problem, the earthquake rescue model is constructed, and the area affected by the earthquake is reasonably divided.  ...  model to form a useful earthquake rescue model.  ...  Hierarchical Diagrams.  ... 
doi:10.1155/2020/4576093 fatcat:uiksf7xsmve4dfaqxfs6pbninq

Research on Dynamic Evolution Model and Method of Communication Network Based on Real War Game

Tongliang Lu, Kai Chen, Yan Zhang, Qiling Deng
2021 Entropy  
The comprehensive experimental results of the dynamic evolution of the combat network in the battle scene verify the rationality and effectiveness of the communication network construction.  ...  Based on the data in real combat games, the combat System-of-Systems is usually composed of a large number of armed equipment platforms (or systems) and a reasonable communication network to connect mutually  ...  Hierarchical diagram of combat network topology.Entropy 2021, 23, 487  ... 
doi:10.3390/e23040487 pmid:33923997 fatcat:7zmom5tv5nexrebwuwd4c2agki

The Integrated Use of Enterprise and System Dynamics Modelling Techniques in Support of Business Decisions

K. Agyapong-Kodua, R. H. Weston, S. Ratchev
2012 Advances in Decision Sciences  
The success of the modelling process defined relies on the creation of useful CIMOSA process models which are then converted to causal loops.  ...  In this paper, the use of enterprise and system dynamics modelling techniques has been integrated to facilitate qualitative and quantitative reasoning about the structures and behaviours of processes and  ...  Future research work will look at alternative means of simplifying the integration methodology so that nonexpert system modellers can also populate data into enterprise models for in-depth business process  ... 
doi:10.1155/2012/804324 fatcat:lpewyl2ivbcs3e7wi7e4b32724

CoryneRegNet: an ontology-based data warehouse of corynebacterial transcription factors and regulatory networks

Jan Baumbach, Karina Brinkrolf, Lisa F Czaja, Sven Rahmann, Andreas Tauch
2006 BMC Genomics  
CoryneRegNet is based on a multi-layered, hierarchical and modular concept of transcriptional regulation and was implemented by using the relational database management system MySQL and an ontology-based  ...  The application of DNA microarray technology in post-genomic analysis of bacterial genome sequences has allowed the generation of huge amounts of data related to regulatory networks.  ...  The entities Concept and Relation, which are the main components of the ontology-based data structure, are located in the center of the ER diagram.  ... 
doi:10.1186/1471-2164-7-24 pmid:16478536 pmcid:PMC1382212 fatcat:ke6glarww5ddznroohdymih2cq

An ontology-driven unifying metamodel of UML Class Diagrams, EER, and ORM2

C. Maria Keet, Pablo Rubén Fillottrani
2015 Data & Knowledge Engineering  
To this end, we designed a common and unified ontology-driven metamodel of the static, structural components and constraints in such a way that it unifies ER, EER, UML Class Diagrams v2.4.1, and ORM and  ...  We describe two practical use cases of the metamodel, being a quantitative assessment of the entities of 30 models in ER/EER, UML, and ORM/ORM2, and a qualitative evaluation of inter-model assertions.  ...  Acknowledgments This work is based upon research supported by the National Research Foundation of South Africa and the Argentinian Ministry of Science and Technology (MINCyT).  ... 
doi:10.1016/j.datak.2015.07.004 fatcat:3mrf4plfm5fyrmxtz6lustub5m

Hierarchical Text Classification Using CNNs with Local Approaches

Milan Krendzelak, Frantisek Jakab
2020 Computing and informatics  
A 20Newsgroup hierarchical training dataset with more than 20 categories and three hierarchical levels was used to train the models.  ...  The results demonstrated that our proposed use of CNNs outperformed flat CNN baseline model and both the flat and hierarchical support vector machine (SVM) and logistic regression (LR) baseline models.  ...  We conducted three major experiments with the proposed hierarchical local approaches and compared our results with available flat LR and SVM baseline models and state-of-the-art models, such as h-LR and  ... 
doi:10.31577/cai_2020_5_907 fatcat:f2sanepr3rf57f65s6clpxvtme

A Systematic Review of Technologies, Control Methods, and Optimization for Extended-Range Electric Vehicles

David Sebastian Puma-Benavides, Javier Izquierdo-Reyes, Juan de Dios Calderon-Najera, Ricardo A. Ramirez-Mendoza
2021 Applied Sciences  
The integration of an auxiliary power unit (APU) can extend the range of a vehicle, making them more attractive to consumers.  ...  However, the fear of range anxiety—that a vehicle has insufficient range to reach its destination—is slowing down the adoption of EVs.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/app11157095 fatcat:w5l4mizlufbmxdxf4vr6nwt3jy

Evaluations of Conceptual Models for Semi-structured Database System

Rita Ganguly, Anirban Sarkar
2012 International Journal of Computer Applications  
In the latest years many different models for semi structured data have been proposed; most of them, however, are too specific to allow immediate comparison with other models, and do not easily support  ...  Concluding with a comparison of these works, analyzing their benefits and problems.  ...  In general, ER model are flat in nature [14] and thus unable to facilitate the reuse capability and representation of hierarchical relationship very efficiently.  ... 
doi:10.5120/7869-1145 fatcat:ml6dfihxxzejpgr7rs6wz4xqfy

The skull beneath the skin: entity-relationship models of information artifacts

T.R.G. Green, D.R. Benyon
1996 International Journal of Human-Computer Studies  
By extending the conventional ER notation slightly (to give ERMIA, Entity-Relationship Modelling for Information Artefacts) it can be used to describe differences between different representations of the  ...  s (1994) index of 'cost-of-knowledge' in an information structure, plus a novel index, the 'cost-of-update'; these symbolic estimates offer a useful complement to the highly detailed analyses of time costs  ...  Acknowledgements We are grateful to many colleagues and friends for discussion of these issues, notably Denise Whitelock, Diana Bental, and Darrell Raymond, and to numerous detailed constructive comments  ... 
doi:10.1006/ijhc.1996.0034 fatcat:uk7rko2ogndjjgz2ghn7cd4bli

Tool-based re-engineering of a legacy MIS: An experience report [chapter]

Thomas Kudrass, Marco Lehmbach, Alejandro Buchmann
1996 Lecture Notes in Computer Science  
We present an experience report on the use of CASE tools for re-engineering a legacy MIS and illustrate the process of current state analysis and generation of a re-engineered target system.  ...  Based on the experience gained in evaluating representative CASE tools for their suitability in the data re-engineering process and the actual use of the ISEE tool we present a list of needed features  ...  Acknowledgements We would like to thank Rhone-Poulenc Rorer, Cologne, for their support of the work of Marco Lehmbach while doing his Masters Thesis there.  ... 
doi:10.1007/3-540-61292-0_7 fatcat:6igiu7qglvaznktqxpsuau4ele
« Previous Showing results 1 — 15 out of 3,630 results