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IEEE SOFTWARE 1998年第3期15卷 22-+页

作者： Cobb, MA Foley, H Wilson, R Chung, MY Shaw, KB USN Res Lab Charting & Geodesy Branch Stennis Space Ctr MS 39529 USA Univ So Mississippi Hattiesburg MS 39406 USA

Traditional databases can be restructured to take advantage of OO methods. Java's advent has enhanced OO's benefits by providing a way to run applications across varying platforms. To take advantage of these trends, the authors first converted a relational database to the OO paradigm, then migrated it to the Web. Here they describe the procedures and technologies they used to accomplish the migration.

关键词： Internet client-server systems object-oriented languages object-oriented methods relational databases Corba specification Java based mapping client OO database migration OO paradigm Smalltalk mapping prototype Web geographic objects project goal query ca Relational databases client-server systems Internets object oriented programming languages object orientation Web search engines

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Dynamic modeling and simulation of a dual-clutch automated lay-shaft transmission

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JOURNAL OF MECHANICAL DESIGN 2005年第2期127卷 302-307页

作者： Zhang, Y Chen, X Zhang, X Jiang, H Tobler, W Univ Michigan Dept Engn Mech Dearborn MI 48128 USA Ford Motor Co Sci Lab Dearborn MI 48128 USA

This paper presents a systematic model for the simulation and analysis of a power-shift transmission that features a dual-clutch design. The paper models the kinematics, dynamics, and control of the transmission for the analysis of powertrain overall performance and shift transient characteristics. The model is implemented in an object-oriented software tool. Analytical formulations and look-up tables are both used for modeling of powertrain components. The vehicle system model is established by integrating the various components and subsystem models according to the transmission power flow and control logic. The input to the simulation model is the vehicle speed-time profile and the output provides the speed follow-up, engine, and clutch operation status for the drive range and shift processes involved. As a numerical example, the model is used for a vehicle equipped with the power-shift transmission to simulate the speed follow-up over a specified drive range and the dynamic transients during shifts. 0 2004 American Institute of Physics.

关键词： Simulation clutches Signals Flow (Dynamics) Pressure automotive components Kinematics table lookup mechanical engineering computing Gears Torque Dynamic modeling object-oriented methods Vehicles Dynamics (Mechanics) Modeling Design Control equipment Engines

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REPRESENTING SOFTWARE ENGINEERING MODELS - THE TAME GOAL oriented APPROACH

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IEEE TRANSACTIONS ON SOFTWARE ENGINEERING 1992年第10期18卷 886-898页

作者： OIVO, M BASILI, VR UNIV MARYLAND DEPT COMP SCICOLL PKMD 20742 UNIV MARYLAND INST ADV COMP STUDIESCOLL PKMD 20742

This paper describes a methodology as well as a knowledge representation and reasoning framework for top down goal oriented characterization, modeling and execution of software engineering activities. A prototype system (ES-TAME) is described which demonstrates the underlying knowledge representation and reasoning principles. ES-TAME provides an object-oriented meta-model concept in order to provide effective support for tailorable and reusable software engineering models. It provides the basic mechanisms, functions and attributes for all the other models. It is based on inter-object relationships, dynamic viewpoints and selective inheritance in addition to traditional object-oriented mechanisms. Descriptive software engineering models (SEM's) include representations for basic software engineering activities like life cycle models, project models, resource models, design methods, quality models etc. They are controlled and made operational by active GQM models which are built by a systematic mechanism for defining and evaluating project and corporate goals and using measurement to provide feedback in real-time. A rule-based data-driven mechanism is defined for constructing and instantiating generic GQM templates into hierarchical GQM models. Support for the RT-SA/SD method is used as a case study of modeling the design phase of real-time software development.

关键词： ES-TAME SYSTEM GOAL QUESTION METRICS PARADIGM IMPROVEMENT PARADIGM INHERITANCE INTER-object RELATIONSHIPS KNOWLEDGE-BASED TECHNIQUES object-oriented methods REUSE RULE-BASED TECHNIQUES SOFTWARE ENGINEERING SOFTWARE MODELING TAME-PROJECT

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object-oriented load flow for radial and weakly meshed distribution networks

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IEEE TRANSACTIONS ON POWER SYSTEMS 2003年第4期18卷 1265-1274页

作者： Losi, A Russo, M Univ Cassino Dipartimento Ingn Ind I-03043 Cassino Italy

object-oriented load flow modeling is presented for both radial and weakly Meshed distribution systems. An 00 algorithm based on the Newton-Raphson technique is proposed. In the object oriented formulation, some approximations to the full Jacobian matrix are introduced. Consequently, a detailed study of the convergence characteristics of the proposed object oriented algorithm is presented and some sufficient conditions for convergence are derived. Particular attention is paid to the relationship between the electrical parameters of the distribution system and the mathematical parameters that influence the convergence properties of the algorithm. The numerical results obtained in the case of some test systems give evidence of the features of the algorithm.

关键词： convergence of numerical methods load flow analysis Newton-Raphson method object-oriented methods object oriented programming power distribution

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SIMOO-RT - An object-oriented framework for the development of real-time industrial automation systems

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IEEE TRANSACTIONS ON ROBOTICS AND AUTOMATION 2002年第4期18卷 421-430页

作者： Becker, LB Pereira, CE Univ Fed Rio Grande do Sul BR-90035190 Porto Alegre RS Brazil

This paper presents SIMOO-RT, an object-oriented framework designed to support the whole development cycle of real-time industrial automation systems. It is based on the concept of distributed active objects, which are Autonomous execution entities that have their own thread of control, and that interact with each other by means of remote, methods invocation. SIMOO-RT covers most of the, development phases, from requirements engineering to implementation. It starts with the construction of an object model of the technical plant to be automated, on which user and problem-domain requirements are captured. Here, emphasis on modeling timing constraints is given. The technical details involved in the process of mapping problem-domain objects to design specific entities as well as the automatic code generation for the runtime application are discussed in the paper. Furthermore, details are given on how to monitor the runtime applications and to evaluate its timing restrictions.

关键词： object-oriented methods real-time systems software tools system analysis and design

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Componentization: The Visitor example

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COMPUTER 2006年第7期39卷 23-+页

作者： Meyer, Bertrand Arnout, Karine Swiss Fed Inst Technol Zurich Switzerland AXA Rosenberg Orinda CA USA

Patterns provide a vocabulary and catalog for common design solutions but are not reusable software. Through advanced object-oriented language mechanisms it is possible to simplify the application developer's job ... 详细信息

关键词： object-oriented languages object-oriented methods object-orientedprogramming software architecture software reusability object-oriented language mechanism object-oriented method object-oriented programming software architecture software design pattern s

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An object-oriented approach to fully interactive finite element software

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ADVANCES IN ENGINEERING SOFTWARE 1998年第2期29卷 139-149页

作者： Mackie, RI Univ Dundee Dept Civil Engn Dundee DD1 4HN Scotland

An object-oriented approach is used to implement a fully interactive finite element program. The program provides rapid response to user changes to the structure. The main features of the design of the program are: (i) an object-oriented distributed data model is used for the finite element objects;(ii) the calculation process is substructure-based;(iii) multi-threading (i.e. concurrent processing) is used. The distributed data structure used matches closely the data structure used by the mathematics of the sub-structure-based calculation process, and that of the multi-threading used in the program. The object-oriented approach makes it much easier to exercise control over the calculation processes, both in terms of the algorithms used, and in taking advantage of the multi-threading, (C) 1998 Published by Elsevier Science Ltd. All rights reserved.

关键词： finite elements object-oriented methods concurrent processing interactivity sub-structuring

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Dispersed generation modeling for object-oriented distribution load flow

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IEEE TRANSACTIONS ON POWER DELIVERY 2005年第2期20卷 1532-1540页

作者： Losi, A Russo, M Univ Cassino Dipartimento Ingn Ind I-03043 Cassino FR Italy

The interest in dispersed generation (DG) is world-widely increasing. The connection of small generating units affects the operation of distribution systems and classical modeling and analyzing techniques must be revised. Recently, a novel approach to the distribution load-flow problem has been proposed: the object-oriented (OO) paradigm has been applied both to the system modeling and to the Newton-Raphson solving algorithm in the cases of radial and weakly meshed distribution systems. In this paper, the OO load-flow modeling and algorithm are extended to account for the inclusion of DG. The OO paradigm allows easily introducing accurate models of DG interfacing to the network by various electric devices (synchronous generators, induction machines, power electronics converters). Numerical applications are presented to evidence the features of the algorithm evaluating the effects of DG on the operation of two test systems.

关键词： dispersed generation load-flow analysis object-oriented methods object-oriented programming power distribution

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object-oriented creation of input signals for system identification

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IET CONTROL THEORY AND APPLICATIONS 2014年第10期8卷 821-829页

作者： Barker, H. Anthony Tan, Ai Hui Godfrey, Keith R. Swansea Univ Coll Engn Swansea SA2 8PP W Glam Wales Multimedia Univ Fac Engn Cyberjaya 63100 Malaysia Univ Warwick Sch Engn Coventry CV4 7AL W Midlands England

This study describes how a very large number of deterministic input signals for system identification may be created by object-oriented methods. The concepts of aggregation and inheritance, combined with the properties of m-sequences, are utilised to develop two new methods for the creation of pseudorandom perturbation signals with ideal spectral properties, two, three, five or seven levels and a very wide range of periods. The available signal levels ensure that the signals are suitable for both linear and non-linear system identification and the availability of a large number of signal periods ensures that the signals are suitable for both single and multi-input system identification. The methods are described in detail and illustrated by examples, together with their implementation in the open environment of an efficient, user-friendly and freely available MATLAB program which provides third-party software to complement existing MATLAB Identification Toolboxes.

关键词： object-oriented methods signal processing identification m-sequences linear systems nonlinear systems control engineering computing object-oriented creation input signals object-oriented method m-sequences pseudorandom perturbation signal spectral property signal level nonlinear system identification signal periods single system identification multiinput system identification Matlab program third-party software Matlab identification toolbox

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Examining the Influence of Tidal Stage on Salt Marsh Mapping Using High-Spatial-Resolution Satellite Remote Sensing and Topobathymetric LiDAR

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IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 2018年第9期56卷 5169-5176页

作者： Campbell, Anthony Wang, Yeqiao Univ Rhode Isl Dept Nat Resources Sci Kingston RI 02881 USA

Salt marsh vegetation extent and zonation are often controlled by bottom up factors determined in part by the frequency and duration of tidal inundation. Tidal inundation during remote-sensing mapping of salt marsh resources can alter the resulting image classification. The degree of this impact on mapping with very high resolution (VHR) imagery has yet to be determined. This paper utilizes topobathymetric light detection and ranging (LiDAR) data and bathtub models of a tidal stage at 5 cm intervals from mean low water (MLW) to mean high water (MHW) and determines the impact of tidal variation in salt marsh mapping within Jamaica Bay, NY, USA. Tidal inundation models were compared with the Worldview-2 and Quickbird-2 imageries acquired at a range of tidal stages. The modeled inundation of normalized difference vegetation index and smooth cordgrass (S. alterniflora) maps was compared from MLW to MHW. This paper finds that at 0.6 m above MLW, only 3.5% of S. alterniflora is inundated. This paper demonstrates a modeling approach integrating VHR satellite remote-sensing data and topobathymetric LiDAR data to address tidal variation in salt marsh mapping. The incremental modeling of the tidal stage is important for understanding areas most at risk from sea level rise and informs management decisions in accordance with this.

关键词： High-resolution imagery Jamaica Bay NY object-oriented methods salt marsh mapping topobathymetric light detection and ranging (LiDAR)

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