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New trends in building numerical programs

COMPUTERS & CHEMICAL ENGINEERING 2011年第7期35卷 1215-1225页

作者： Buzzi-Ferraris, Guido Politecn Milan Dipartimento Chim Mat & Ingn Chim Giulio Natta I-20133 Milan Italy

This manuscript focuses the attention on the possibility that some basic programs for solving numerical problems have to be revised. The fundamental case of linear system solution and related concepts is proposed as example of the different ways to approach a problem using object-oriented programming and procedural approaches. The different points of view shows that the traditional approach adopted to deem the conditioning of a system as well as all existing programs to solve linear systems need to be revised. A brief discussion deals with the possibility of parallelizing programs for personal computers and with interaction of parallel computing and object-oriented programming. (c) 2010 Published by Elsevier Ltd.

关键词： object-oriented programming Parallel computing Linear systems Condition number

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A C++ simulator generator from graphical specifications

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SOFTWARE-PRACTICE & EXPERIENCE 1997年第4期27卷 395-423页

作者： Shanbhag, VK Gopinath, K CSA Dept IISc Bangalore 560012 India (email: viveks@*** gopi@csa.iisc.ernet.in) CSA Dept IISc Bangalore 560012 India (email: viveks@*** gopi@csa.iisc.ernet.in)

Many languages for computer systems simulation (like GPSS and CSim) use a stochastic model of systems with the provision of adding procedural code for those aspects of the system that cannot be captured easily by a stochastic model. However, they do not support the hierachical simulation of complex systems well. Complex computer systems may have to be simulated at various levels of abstraction in the interests of tractability: the flexibility of being able to freely move between the different levels of abstraction is very desirable. For example, in the area of computer architecture, one might have analytical models, detailed simulation models and trace-driven models. In addition, these languages do not have user-friendly interfaces for specification of the simulated system. In this paper, we discuss the design and implementation of a simulation package for hierachical simulation of non-real-time computer systems: a Simulator Generator from a Graphical System Specification (SIGGSYS). A new language for system specification has been designed. In addition, the package has the following components: A graphical user interface to aid specification of the system to be simulated. A rear end that generates C++ code that implements a simulator for the specified system. A complete object library along with the header files that implement a functionally complete set of C++ base classes which can be built upon. C++ has been chosen as the intermediate language so that the modeller can use its support for object oriented programming. (C) 1997 John Wiley & Sons, Ltd.

关键词： discrete event system simulation object-oriented programming C++ computer architecture

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AN object-oriented KNOWLEDGE-BASED SYSTEM FOR MANUFACTURABILITY OF PRINTED WIRING BOARDS

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COMPUTERS IN INDUSTRY 1992年第1期18卷 77-89页

作者： PADHY, SK DWIVEDI, SN W VIRGINIA UNIV CONCURRENT ENGN RES CTRMORGANTOWNWV 26506

Design for manufacturability has been proved to be a solution that avoids the problems created by design not amenable to manufacturing. The designer should be aware of the manufacturing constraints to achieve the design for manufacturability. The rapid change in printed circuit board manufacturing with the induction of surface mounted components and robotic assembly has changed the scenario of the design. The high-density packaging capability of surface mounted technology has contributed enormously to the development of new trends in printed wiring board manufacturing. PWBMA, Printer Wiring Board Manufacturability Advisor (printed wiring board is another name for printed circuit board), a knowledge-based system, is developed to capture this new technology and its interaction with the existing through-hole mounting technology. Rules and guidelines pertaining to manufacturability of the board are formulated and incorporated into the knowledge base in building the system, which is built on an object-oriented paradigm. The importance of the object-oriented approach, the implementation of the object-oriented paradigm, object-oriented programming using Smalltalk-80, and the hierarchical rule structure paradigm are discussed. The implementation of meta-level to increase the efficiency of the system is also presented. Furthermore a rating system is introduced to rank various designs. PWBMA is capable of suggesting design modifications at the early stage of design to eliminate the manufacturing problems in the later phase of board production. The system is very easy to use with a broad user interface.

关键词： ARTIFICIAL INTELLIGENCE KNOWLEDGE-BASED SYSTEM object-oriented programming PRINTED CIRCUIT BOARD MANUFACTURABILITY STUDY

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object-oriented TECHNIQUES IN HARDWARE DESIGN

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COMPUTER 1994年第6期27卷 64-70页

作者： KUMAR, S AYLOR, JH JOHNSON, BW WULF, WA UNIV VIRGINIA DEPT ELECT ENGNTHORNTON HALLCHARLOTTESVILLEVA 22903

We focus on using object-oriented techniques to improve the hardware design process. The advantages of these techniques for hardware design include: improved modifiability and maintainability of models; easy component instantiation with different parameters; quick composition of new components; the ability to identify and reuse common components; the ability to tailor general-purpose components to more specialized components; support of dynamic object creation and destruction; and the possibility of employing existing software synthesis and verification techniques. We illustrate the application of object-oriented techniques using a load-store, reduced instruction-set processor that contains a local memory. The instruction set consists of 22 instructions, which require one or two 16-bit words. Arithmetic is performed in two's complement. We use C++ to demonstrate the usefulness of object-oriented techniques, not to provide arguments for or against its use in hardware modeling and design

关键词： C++ common components component instantiation dynamic object creation general-purpose components hardware design hardware modeling instruction sets load-store local memory maintainability modifiability new components object-oriented languages object-oriented methods object-oriented programming object-oriented techniques reduced instruction set computing reduced instruction-set processor software synthesis twos complement verification techniques

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USING LARCH TO SPECIFY AVALON/C++ objectS

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IEEE TRANSACTIONS ON SOFTWARE ENGINEERING 1990年第9期16卷 1076-1088页

作者： WING, JM School of Computer Science Carnegie Mellon University Pittsburgh PA 15213

This paper gives a formal specification of three base Avalon/C++ classes; recoverable, atomic, and subatomic. Programmers derive from class recoverable to define persistent objects, and from either class atomic or class subatomic to define atomic objects. The specifications, written in Larch, provide the means for showing that classes derived from the base classes implement objects that are persistent or atomic, and thus exemplify the applicability of an existing specification method to specifying 'nonfunctional' properties. Writing these format specifications for Avalon/C++'s built-in classes has helped to clarify places in the programming language where features interact, to make unstated assumptions explicit, and to characterize complex properties of objects. [ABSTRACT FROM AUTHOR]

关键词： Atomicity Avalon C + + distributed systems fault- tolerance formal methods Larch object-oriented programming specification transactions

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Preparing the software engineer for a modern multi-core world

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JOURNAL OF PARALLEL AND DISTRIBUTED COMPUTING 2018年第Part1期118卷 247-263页

作者： Giacaman, Nasser Sinnen, Oliver Univ Auckland Dept Elect & Comp Engn Parallel & Reconfigurable Comp Grp Auckland New Zealand

Parallel and Distributed Computing (PDC) was traditionally viewed as an advanced subject reserved for elective graduate courses. The last decade has seen two areas with rapid growth, whose synergy is demanding new skills for software engineers in a modem multi-core world. The first has been society's increasing demand for software engineering solutions, evident in the integral role that software plays in daily life. Unlike traditional PDC applications in the scientific and engineering domains, modem software applications are interacting directly with millions of users on mainstream laptops, smartphones and tablets. The second trend is that of multi-core processors powering such devices, which is further fueling the potential of software applications. This paper proposes a Modern Parallel programming Framework that recognizes that successful software engineering in this domain involves a combination of hard skills and soft skills. A course dedicated to this goal is presented and evaluated, incorporating a research-infused, problem-based and active learning approach. (C) 2018 Elsevier Inc. All rights reserved.

关键词： Software engineering Concurrency Parallel programming Active learning Research-infused learning Problem-based learning Soft skills Graphical user interfaces object-oriented programming

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Behavioral specification of distributed software component interfaces

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COMPUTER 1999年第7期32卷 46-+页

作者： Della Torre, C Rotenstreich, S George Washington Univ Dept Comp Sci & Elect Engn Washington DC 20052 USA

Networked computers are finding their way into a broader range of environments, from corporate offices to schools, homes, and shirt pockets. This new computing model fosters the development of distributed software components that communicate with one another across the underlying networked infrastructure. A distributed software component can be plugged into distributed applications that may not have existed when it was created. The intention is that many developers will reuse distributed software components to build new systems. An interface definition language usually is used to describe a distributed software component's interface. However, a notable limitation of current IDLs is that they generally only describe the names and type signatures of the component's attributes and operations. Current IDLs don't formally specify the behavior of the software component's operations. To help solve these problems, the authors have developed Biscotti (behavioral specification of distributed software component interfaces), a Java extension that enhances Java remote method invocation interfaces with Eiffel-style preconditions, postconditions, and invariants.

关键词： Biscotti Eiffel-style invariants Eiffel-style postconditions Eiffel-style preconditions Java Java extension Java remote method invocation interfaces application program interfaces behavioral specification distributed applications distributed programming distributed software component interfaces distributed software component reuse formal specification networked computers object-oriented programming remote procedure calls software reusability

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A SERVICE ACQUISITION MECHANISM FOR SERVER-BASED HETEROGENEOUS DISTRIBUTED SYSTEMS

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IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS 1994年第2期5卷 154-169页

作者： CHANG, RN RAVISHANKAR, CV BELL COMMUN RES INC MORRISTOWNNJ 07962

This paper presents a mechanism that facilitates and enhances the use of independently administered remote network servers in the presence of server interface heterogeneity. The mechanism is designed under the client-service model, which extends the client-server model with an abstraction of service to decouple abstract server capabilities from concrete server interface specifics such as server interface binding protocols and the interface operation invocation protocols. The mechanism selects servers, accommodates server interface heterogeneity, and handles server access failures as per the abstract server capabilities desired by the client. It could return the identity of the server used for each service access invocation to facilitate billing, refining service specifications, and reporting server-specific errors. This paper also illustrates a C library interface to this mechanism, and describes a language veneer over the C programming language demonstrating bow a typed procedural language could be extended by a few language constructs to support the mechanism under the client-service model. In this language, server capabilities are referenced by abstract data type (ADT) objects, and are accessed by invoking the objects' interface operations using a call-by-value-result paradigm. This language veneer also makes it easier to port the client software across to systems that use different service specification schemes. Our work suggests that this mechanism facilitates the development, use, and maintenance of client and server software in large heterogeneous distributed systems comprising many autonomous servers. It also shows that the overhead of invoking remote server operations via the mechanism can be quite low.

关键词： HETEROGENEOUS DISTRIBUTED SYSTEMS CLIENT-SERVER MODEL CLIENT-SERVICE MODEL SERVICE ACQUISITION MECHANISM ATTRIBUTE-BASED NAMING REMOTE PROCEDURE CALL SERVER INTERFACE DIRECTORY SERVICE AGENT PROCESS FAULT TOLERANCE object-oriented programming LANGUAGE VENEER

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Trends in laboratory information management system

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CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS 2012年 118卷 187-192页

作者： Prasad, Poonam J. Bodhe, G. L. CSIR Natl Environm Engn Res Inst Nagpur 440020 Maharashtra India

Laboratory information management systems (LIMS) is designed considering the need of analytical laboratories to carry out the research in fast, efficient and transparent manner with better accessibility of the instruments. Its development started as an in-house project then moved to custom built solutions followed with open source LIMS, first LIMS were developed in the pharmaceutical and related industries for use as a Quality Assurance/Quality Control (QA/QC) tool in the early 1980's by in-house development departments or under contract by external software houses. Further, it is commercially developed by using the latest tools in information technology and based on the need of the laboratory it has got many varieties. Various sectors like agriculture, environmental and water, food and beverage, manufacturing, product quality and cyber forensic analysis etc. uses full-enterprise LIMS in their operations. It was found that the LIMS applications are not running properly due to its limitation such as improper installation, poor implementation, lack of technical access etc. This paper highlights the review of developmental stages of LIMS and some shortcomings for attaining the total quality management in a laboratory that ensure efficiency, enhanced productivity, better utilization of resources and security measures etc. An effective management system totally depends on the laboratory infrastructure. Hence, proper study of the laboratory functionalities is required before going ahead with the solution. (C) 2012 Elsevier B.V. All rights reserved.

关键词： LIMS Remote access object-oriented programming ASP SQL

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VISTA - A USER INTERFACE FOR A DISTRIBUTED object-oriented SOFTWARE ENGINEERING ENVIRONMENT

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SOFTWARE ENGINEERING JOURNAL 1992年第1期7卷 25-34页

作者： RODDEN, T SAWYER, P SOMMERVILLE, I UNIV LANCASTER DEPT COMPLANCASTER LA1 4YRENGLAND

This paper describes a prototype user interface for a distributed software engineering environment, where the components of the environment are autonomous agents with some inherent decision-making capabilities. Agents may be distributed across a local- or wide-area network. Two forms of interaction are supported;namely, direct manipulation and message passing. Synchronous interaction is supported via the direct manipulation of system objects. Asynchronous interaction is managed by a central server agent, distributing electronic mail messages to the appropriate human or automated agents. The functionality of the system is illustrated by examples drawn from the domain of software development.

关键词： electronic mail inherent decision-making capabilities automated agents programming environments software development User interfaces Computer networks and techniques wide-area network system objects object-oriented programming direct manipulation Computer communications autonomous agents prototype user interface distributed object-oriented software engineering environment Vista electronic mail messages distributed software engineering environment object-oriented programming message passing programming support user interfaces computer networks central server agent

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