多媒体课件开发平台软件环境的分析比较

当今世界,教育信息化是教育现代化的一个重要方向.CAI技术又是推进教育信息化的重要手段之一.作者根据近年来制作多媒体课件取得一些经验的基础上,对目前比较流行的几种多媒体课件开发平台的软件环境,包括编辑电子讲稿的PowerPoint软件,编辑光盘课件的Authorware和Director软件,编辑网络课件的ASP、PHP和JSP网页编辑和运行环境,以及编辑网络流媒体课件的Flash软件的性能特点、相关技术、实现难度、学习难度、适用场合等作了分析比较,并对它们的优势和局限给出了明确的结论,可供有兴趣制作多媒     

The transaction-based pricing trend [for software packages]

There are two major reasons that pricing of user licenses for software has been a continual struggle: (1) software doesn't wear out-throwing suspicion on depreciation-based structures-and (2) the cost of replication is infinitesimal-raising questions about unit pricing. The problems of pricing grow in direct proportion to the anticipated number of users per license. With the trend towards object-oriented programming, it may be time to move towards a new regimen that more closely aligns the price of software with the continuing benefits that users derive. What if each object included an embedded pricing function? The pricing function would set the price that the designer would pay the object's author. Each time the program was licensed to a user, the designer would receive an invoice that was automatically generated by the object. This permits the author to post the object in its entirety within an electronic catalog and wait for the royalty checks to arrive. The embedded pricing function presents several problems. First and foremost, it presupposes that the user is going to pay a flat fee for using the program. This supposition is based on the premise that all users are alike or so nearly alike that a single pricing scheme could be implemented. To avoid this problem, the price users are charged for the program must be directly tied to the benefits they derive. Each time the program completes an activity, the pricing function would automatically bill the user for a transactional fee in much the same way the designer is billed for using the object     

A model for the evaluation of computer software packages

The tremendous increase in recent years in the demand for, and availability of, computer software packages, has led researchers to investigate better ways of evaluating them for selection. The selection of software packages is confounded because criteria for evaluation are dependent on the system type. For example, decision support systems should be judged largely on the basis of subjective criteria, while transaction processing systems can be evaluated primarily on quantifiable factors. We discuss the use of a well-known model used in site selection, as a means to evaluate software packages according to subjective or objective factors. We illustrate application of the model with a small example.     

有限元分析软件平台FEPG

多数有限元软件一般只适用于某些特定领域和类型的问题,不能满足其他领域尤其是科研和教学领域工作者的需要,因此开发借助有限元语言等技术自动生成有限元程序的有限元分析软件平台FEPG.介绍用于描述有限元问题的有限元语言:该语言分为两部分,一部分用于描述偏微分方程表达式,另一部分用于描述求解微分方程的有限元算法;用户只需通过有...     

An implementation of cloud-based platform with R packages for spatiotemporal analysis of air pollution

The Journal of Supercomputing - Recently, the R package has become a popular tool for big data analysis due to its several matured software packages for the data analysis and visualization,...     

Refactoring software packages via community detection in complex software networks

An intrinsic property of software in a real-world environment is its need to evolve, which is usually accompanied by the increase of software complexity and deterioration of software quality, making software maintenance a tough problem. Refactoring is regarded as an effective way to address this problem. Many refactoring approaches at the method and class level have been proposed. But the research on software refactoring at the package level is very little. This paper presents a novel approach to refactor the package structures of object oriented software. It uses software networks to represent classes and their dependencies. It proposes a constrained community detection algorithm to obtain the optimized community structures in software networks, which also correspond to the optimized package structures. And it finally provides a list of classes as refactoring candidates by comparing the optimized package structures with the real package structures. The empirical evaluation of the proposed approach has been performed in two open source Java projects, and the benefits of our approach are illustrated in comparison with the other three approaches.     

Universal software packages to model the distributed-parameter systems

Consideration was given to the universal software packages for modeling objects and distributed-parameter systems obeying the partial differential equations. The packages may serve as important tools for industrial automation because the majority of industrial objects have distributed parameters. The review presented the results of comparing a number of commercial packages against a set of user-defined criteria. Its final part was devoted to some freeware packages. Conclusions were drawn, and recommendations for using the considered packages were given.     

A real-time software platform for the Cell processor

Scalability, efficiency, and programmability are essential for using the cell processor in consumer electronics. A real-time resource scheduler virtualizes the processor cores and ensures the application of real-time constraints at the system level. These features let the platform control resource usage and help exploit the power management features implemented in the cell processor.     

A comparative study of the reliability of nine statistical software packages

The reliabilities of nine software packages commonly used in performing statistical analysis are assessed and compared. The (American) National Institute of Standards and Technology (NIST) data sets are used to evaluate the performance of these software packages with regard to univariate summary statistics, one-way ANOVA, linear regression, and nonlinear regression. Previous research has examined various versions of these software packages using the NIST data sets, but typically with fewer software packages than used in this study. This study provides insight into a relative comparison of a wide variety of software packages including two free statistical software packages, basic and advanced statistical software packages, and the popular Excel package. Substantive improvements from previous software reliability assessments are noted. Plots of principal components of a measure of the correct number of significant digits reveal how these packages tend to cluster for ANOVA and nonlinear regression.     

小卫星软件共用平台设计

以小卫星共用平台相配套,以面向对象的程序设计方法（OOP）为基础,提出软件共用平台的设计。利用OOP的封装性、继承性和多态性,设计小卫星软件的基本类库,介绍各个基本类的具体设计思想。最后给出由基本类库生成星载机软件系统的实例。实践表明,软件共用平台对小卫星研制是行之有效的技术。     

Joust: a platform for liquid software

The authors describe a Java-based platform for liquid software, called Joust, that is specifically designed to support low-level, communication-oriented systems and to avoid the limitations of general-purpose OSs. The authors contrast the platform requirements for communication-oriented liquid software with those of computation-oriented software, identify the limitations of current platforms, and outline the benefits of Joust. They also offer an overview of Scout (the underlying OS upon which Joust is built), its runtime system, and its just-in-time (JIT) compiler     

Success of software packages in small businesses: an exploratory study

In this paper we develop and use a framework for evaluating the success of microcomputer based integrated administrative software packages in small businesses. The results of an exploratory survey of 66 small business organizations show that small businesses have often been disappointed with their software packages. The disappointment is frequently a result of the inability of the package to adapt to the needs of the company, especially in small businesses of more than 50 employees. For small businesses of less than 20 employees the packages are too difficult to use. These findings indicate that small businesses should place more emphasis on the acquisition, especially the requirements specification, and developers should improve user-friendliness, the quality of support and documentation to fulfil the needs of the smallest of small businesses. The successful implementers—because of their experience—knew their needs, carefully acquired the package, and implemented various parts of it, benefiting from integration. There seem to be no shortcuts to success, but a determined and eager attitude of the personnel can produce success with any of the software packages in our study.     

移动自组网软件平台的研究与设计

终端设备的独有特性包括它们的移动性、个性化和位置感知,形成了新型的无线应用,能满足普遍存在的移动计算需求。展示一种在移动自组网环境下的无线终端设备。终端设备选择在Linux嵌入式平台进行开发。在该设备上,实现了AODV、MAODV路由算法并在NS-2上进行了路由协议性能的比较和分析。最后给出了终端设备原型的实现,并且提出了未来的改进方向和应用场景。     

自动化软件平台发展趋势

<正>1工业化与信息化背景1.1工业化与信息化的融合工业化是驱动经济社会发展的重要动力,而信息化已经渗透到生产管理、经济生活的各个角落,信息化与工业化的融合代表了未来经济发展的方向,是占领后危     

少数民族文字文本分析与识别的研究进展

对于少数民族古籍的保护与传承,国家予以高度重视,并强调了对这些不可再生文化资源透彻数字化的重要性。随着文档图像分析与识别技术的不断进步,对少数民族文字的文本分析与识别研究受到广泛关注,并取得显著成就,成为人工智能应用研究的一个热点领域。然而,由于少数民族文字种类繁多、应用场景多样及数据集的稀缺性等问题,这一研究领域仍面临诸多挑战。本文旨在总结先前的工作,并为未来的研究提供支持,重点讨论了印刷体文本、联机手写、古籍文档及场景文字识别等任务,概述了国内外在少数民族文种识别领域的发展和最新成果。首先阐明了少数民族文字文本分析与识别的重要性及其价值,介绍了特定少数民族文字及其古籍文档的特征。然后,回顾了这一领域的发展历史和现状,分析并总结了传统方法的代表性成果及其应用;详细讨论了研究重点向深度神经网络模型和深度学习方法的全面转移,这一转变使得各文种的识别性能得到了显著提升。最后,基于相关分析,本文指出了在不同文种文档分析与识别中存在的精度和泛化能力等方面的不足,以及与汉文文本分析与识别的差异;面对少数民族文字文本识别领域的主要困难与挑战,展望了未来的研究趋势和技术发展目标。     

《通信原理》软件实验平台设计

《通信原理》是高等工科院校通信专业的一门重要专业基础课,课程实验是教学环节中不可缺少的必要组成部分。本文设计了一种基于SystemView的该课程软件实验平台,并以四进制差分编码及QDPSK正交调制与解调为例说明了该实验平台的应用。     

嵌入式数字视频播放系统软件平台的构建

本文介绍了在PowerPC405上利用嵌入式Linux来构建数字视频播放系统软件平台的过程,探讨了嵌入式Linux系统里交叉编译器、bootloader、Linux内核、根文件系统等几个主要部分的构建过程。     

An empirical investigation on the reusability of design patterns and software packages

Nowadays open-source software communities are thriving. Successful open-source projects are competitive and the amount of source code that is freely available offers great reuse opportunities to software developers. Thus, it is expected that several requirements can be implemented based on open source software reuse. Additionally, design patterns, i.e. well-known solution to common design problems, are introduced as elements of reuse. This study attempts to empirically investigate the reusability of design patterns, classes and software packages. Thus, the results can help developers to identify the most beneficial starting points for white box reuse, which is quite popular among open source communities. In order to achieve this goal we conducted a case study on one hundred (100) open source projects. More specifically, we identified 27,461 classes that participate in design patterns and compared the reusability of each of these classes with the reusability of the pattern and the package that this class belongs to. In more than 40% of the cases investigated, design pattern based class selection, offers the most reusable starting point for white-box reuse. However there are several cases when package based selection might be preferable. The results suggest that each pattern has different level of reusability.     

Case studies of expert systems development using microcomputer software packages

Abstract: This paper reports experience with the use of two expert system shell' packages gained during the ARIES project. We report on the desiderata used for selecting the products, the positive and negative features of each and draw some general conclusions about their utility for future systems development. The microcomputer approach is compared with that of specialist workstations and conclusions are drawn concerning design methods for knowledge based systems. The two products considered are Crystal and Leonardo.