共查询到20条相似文献,搜索用时 54 毫秒
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现在的个人电脑里,我相信除了安装操作系统之外,有一种软件是大家都会安装的,那就是杀毒软件。随着病毒的越来越猖狂,病毒数量的不断增多,病毒的不断传播,杀毒软件现在已经成为必备的软件之一出现在大家的电脑里了。 相似文献
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天天 《数字社区&智能家居》2003,(1):34-41
某年某月某日,夜黑的让人害怕,正可谓是月黑风高杀人夜。郊外漆黑的树林里,正在掀起一场血雨腥风……哎呀!谁扔的臭鸡蛋啊……(小编语,想骗稿费呀)唉!以下挥泪略去精彩场景描写千余字,言归正传。想必大家一定对前一段时间的杀毒软件大战还记忆犹新吧,随着杀毒大战硝烟的渐渐散去,让我们来好好见识一下这次大战中的主角——三位对病毒无情剿杀的冷血杀手:金山毒霸2003,KV3000杀毒王和瑞星2003。 相似文献
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Evaluating and selecting software packages that meet an organization’s requirements is a difficult software engineering process. Selection of a wrong software package can turn out to be costly and adversely affect business processes. The aim of this paper is to provide a basis to improve the process of evaluation and selection of the software packages. This paper reports a systematic review of papers published in journals and conference proceedings. The review investigates methodologies for selecting software packages, software evaluation techniques, software evaluation criteria, and systems that support decision makers in evaluating software packages. The key findings of the review are: (1) analytic hierarchy process has been widely used for evaluation of the software packages, (2) there is lack of a common list of generic software evaluation criteria and its meaning, and (3) there is need to develop a framework comprising of software selection methodology, evaluation technique, evaluation criteria, and system to assist decision makers in software selection. 相似文献
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The authors report detailed data and analyses on productivity and quality from 29 Hewlett-Packard projects. While some software development models' characteristics affect performance negatively when considered alone, their impact disappears when considered in combination with other attributes. So, processes should be thought of as coherent systems of activities rather than as a series of individual practices that can be implemented piecemeal. 相似文献
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航天型号软件生存周期模型选择指南 总被引:2,自引:0,他引:2
文中首先阐述了有关生存周期模型的基本概念,简要介绍4个已在国内外航天界得到成功应用的典型生存周期模型:瀑布模型、增量模型、进化模型和基于软件包的生存周期模型,分别给出了这4个生存周期模型的优点、缺点、适用情况以及各生存周期阶段的主要产品和里程碑评审,最后给出选择航天型号软件生存周期模型的基本原则。 相似文献
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《Information and Software Technology》2005,47(9):587-608
Modern large new product developments (NPD) are typically characterized by many uncertainties and frequent changes. Often the embedded software development projects working on such products face many problems compared to traditional, placid project environments. One of the major project management decisions is then the selection of the project's software process model. An appropriate process model helps coping with the challenges, and prevents many potential project problems. On the other hand, an unsuitable process choice causes additional problems. This paper investigates the software process model selection in the context of large market-driven embedded software product development for new telecommunications equipment. Based on a quasi-formal comparison of publicly known software process models including modern agile methodologies, we propose a process model selection frame, which the project manager can use as a systematic guide for (re)choosing the project's process model. A novel feature of this comparative selection model is that we make the comparison against typical software project problem issues. Some real-life project case examples are examined against this model. The selection matrix expresses how different process models answer to different questions, and indeed there is not a single process model that would answer all the questions. On the contrary, some of the seeds to the project problems are in the process models themselves. However, being conscious of these problems and pitfalls when steering a project enables the project manager to master the situation. 相似文献
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A timely detection of high-risk program modules in high-assurance software is critical for avoiding the high consequences
of operational failures. While software risk can initiate from external sources, such as management or outsourcing, software
quality is adversely affected when internal software risks are realized, such as improper practice of standard software processes
or lack of a defined software quality infrastructure. Practitioners employ various techniques to identify and rectify high-risk
or low-quality program modules. Effectiveness of detecting such modules is affected by the software measurements used, making
feature selection an important step during software quality prediction. We use a wrapper-based feature ranking technique to
select the optimal set of software metrics to build defect prediction models. We also address the adverse effects of class
imbalance (very few low-quality modules compared to high-quality modules), a practical problem observed in high-assurance
systems. Applying a data sampling technique followed by feature selection is a relatively unique contribution of our work.
We present a comprehensive investigation on the impact of data sampling followed by attribute selection on the defect predictors
built with imbalanced data. The case study data are obtained from several real-world high-assurance software projects. The
key results are that attribute selection is more efficient when applied after data sampling, and defect prediction performance
generally improves after applying data sampling and feature selection. 相似文献
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Background: Conclusion Instability in software effort estimation (SEE) refers to the inconsistent results produced by a diversity of predictors using different datasets. This is largely due to the “ranking instability” problem, which is highly related to the evaluation criteria and the subset of the data being used. Aim: To determine stable rankings of different predictors. Method: 90 predictors are used with 20 datasets and evaluated using 7 performance measures, whose results are subject to Wilcoxon rank test (95 %). These results are called the “aggregate results”. The aggregate results are challenged by a sanity check, which focuses on a single error measure (MRE) and uses a newly developed evaluation algorithm called CLUSTER. These results are called the “specific results.” Results: Aggregate results show that: (1) It is now possible to draw stable conclusions about the relative performance of SEE predictors; (2) Regression trees or analogy-based methods are the best performers. The aggregate results are also confirmed by the specific results of the sanity check. Conclusion: This study offers means to address the conclusion instability issue in SEE, which is an important finding for empirical software engineering. 相似文献