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As a common software engineering practice, software dynamic defect models are used to estimate and predict the software testing process progress, effectiveness, and the number of future defects over the next weeks. Practitioners use these dynamic defect models to ensure that the delivery of software to customers is possible from the quality point of view and to predict the release date. Old literature...
In 1978, Putnam presented his "general empirical solution" for the software estimation problem and claimed that the problem was solved. His results continue to be influential, and are sometimes treated as authoritative. Focusing on the effort-duration trade-off, we evaluate his study and its results, examining both his approach and studies that have been published since. Several serious...
The signature-based malware-detection method is the most popular one used in anti-malware software. However, given advanced malware capabilities, the database of traditional signature-based antimalware software is becoming bloated to support identification of every variant. The increase in signatures slows the detection process and, in some cases, exceeds the resource availability of the platforms...
Water injection exploration is a primary technology to ensure crude oil production. Especially during the mid to late term of oil field development, no water injection means no crude production. Therefore, oilfield companies set up large injection pump station and pipe network system to guarantee normal operation and increasing production. Simulation evaluation, optimized running management and automatic...
The paper presents analytical investigations on determination of influence of higher harmonics existing in a ground fault current on the characteristics of transient processes at arcing ground faults. As initial data, results of real oscillography of ground fault currents in the operational 6 kV distribution network are used. It is shown that there are harmonics of high amplitudes in a ground fault...
This study examines the relationship between software project team characteristics and team performance by focusing on two questions: whether or not different team characteristics in software project team affect project performance, and whether or not different types of team motivation lead to different level of influence to the relationship between team characteristics and performance? In this study,...
A long standing problem in software engineering is inadequate requirements elicitation, analysis, specification, validation and management. The lack of well defined requirements is one of the major causes of project failure. Several well-known techniques and frameworks have been developed to deal with the functional aspect of requirements engineering. Recent years have also seen the emergence of frameworks...
In random testing, the distribution of the generated test cases is known as the test profile. We consider the effects of different test profiles, taking advantage of probabilistic information about likely failure-revealing inputs, on the effectiveness of random testing for debugging. We examine a failure-proportional testing strategy, in which tests are randomly sampled with replacement, with probability...
Ohba NHPP models are wide used to discuss the software reliability. We present the necessary & sufficient conditions for the likelihood estimates to be finite, positive, and unique. Results are given for either grouped failure data or ungrouped failure data. we easily apply these results to original G-O model.
This work is concerned with the measure and, most importantly, the prediction of software development projects in terms of cost estimate. The purpose of this paper is to explore the usefulness of recording, in the software project data, the cultural and leadership characteristics of the development team. As a result of the study, a new model for identifying and analyzing was developed. The paper tests...
Simulation software is a fundamental tool that should be used when designing systems dealing with electro-thermal interaction, for instance. Nevertheless, there exist some inconveniences that limit and make specific software hard to use in this task. On one side, it may require a large processing hardware capacity, and on the other, simulation time increases substantially if the model complexity and...
New design method on curved channel of sintering machine is presented through the existing questions in traditional sintering machine, new curved channel shape is established, and deduces curve expressions of each arc in front and back curved channels. Parameterized design method of curved channel is researched based on Unigraphics NX (UG) software, realizes one-step forming for multi-curves, improves...
In the Information Technology (IT) era, investment on IT infrastructures plays an important role for it will influence future competitiveness of enterprises. But up to the present, the study of applying real-options to IT infrastructures investment is still in its preliminary stage, and a general appraisal framework has not been established to assess IT investment by option model. In this paper, an...
Based on both construction methods of the epidemic models and mechanism of the worm propagation, a new SIRS model for virus propagation is derived. By using the theory of differential equations, the propagation regularity of worm virus is discussed and the threshold of removing virus is gained. The analysis techniques of the mathematical model provide theoretical foundation of control and forecast...
This paper presents how to implement a performance technology in a higher engineering course. The ADAMS (automatic dynamic analysis of mechanical system) software is introduced in the mechanical system simulation course at Wuhan University of Science and Engineering. First, basic motion equations for mechanical system simulation are listed out. These formulas are complex and difficult, so large-scale...
It is important and difficult for us to know the progress and quality of requirements analysis. We introduce chaos and software requirements complexity to the description of requirements decomposing, and get a method which can help us to evaluate the progress and quality. The model shows that requirements decomposing procedure has its own regular pattern which we can describe in a equation and track...
Sequential iterative process is a kind of basic product development process. In order to manage and improve this kind of processes, a simulative model and simulation arithmetic for estimating the expect time of sequential iterative development process was proposed. The rework impact factors in the model affect the remaining time of the rework tasks other than the task duration. The performance parameters...
By the investigation to the characteristics of Pedestrians flow on stairways in some main Pedestrians distributing centers, such as the Shanghai Chifeng Road Light Orbit Station, Shanghai People's Square Subway Station and the Shanghai train station and so on, and on the basis of the investigation data above, the fundamental characteristics of Pedestrians flow in transfer station are found by qualitative...
IC design is driven by two simultaneous trends: miniaturization of microelectronics technology, and telecommunication market expansion. When considered at a user level, these trends seem to be compatible: by making devices smaller, integration of a larger number of functionalities in your smart phone is made possible and thus boosts the development of the telecom market. From an IC designer point...
Most software engineering methods require some form of model populated with appropriate information. Real-time systems are no exception. A significant issue is that the information needed is not always freely available and derived it using manual methods is costly in terms of time and money. Previous work showed how machine learning information derived during software testing can be used to derive...
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