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检索条件"任意字段=Proceedings of the 9th International Conference on Predictive Models in Software Engineering"

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Semi-supervised learning for software quality estimation

Semi-supervised learning for software quality estimation

引用

proceedings - 16th IEEE international conference on Tools with Artificial Intelligence, ICTAI 2004

作者： Seliya, Naeem Khoshgoftaar, Taghi M. Zhong, Shi Dept. of Comp. Sci. and Engineering Florida Atlantic University Boca Raton FL

A software quality estimation model is often built using known software metrics and fault data obtained from program modules of previously developed releases or similar projects. Such a supervised learning approach to software quality estimation assumes that fault data is available for all the previously developed modules. Considering the various practical issues in software project development, fault data may not be available for all the software modules in the training data. More specifically, the available labeled training data is such that a supervised learning approach may not yield good software quality prediction. In contrast, a supervised classification scheme aided by unlabeled data, i.e., semi-supervised learning, may yield better results. this paper investigates semi-supervised learning with the Expectation Maximization (EM) algorithm for the software quality classification problem. Case studies of software measurement data obtained from two NASA software projects, JM1 and KC2, are used in our empirical investigation. A small portion of the JM1 dataset is randomly extracted and used as the labeled data, while the remaining JM1 instances are used as unlabeled data. the performance of the semi-supervised classification models built using the EM algorithm is evaluated by using the KC2 project as a test dataset. It is shown that the EM-based semi-supervised learning scheme improves the predictive accuracy of the software quality classification models. © 2004 IEEE.

关键词： software engineering

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Experimenting with linguistic tools for conceptual modelling: Quality of the models and critical features

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9th international conference on the Applications of Natural Language to Information Systems

作者： Kiyavitskaya, N Zeni, N Mich, L Mylopoulos, J Univ Trent Dept Informat & Commun Technol I-38050 Trento Italy Univ Toronto Dept Comp Sci Toronto ON Canada

ISBN: (纸本)3540225641

this paper presents the results of three experiments designed to assess the extent to which a Natural-Language Processing (NLP) tool improves the quality of conceptual models, specifically object-oriented ones. Our main experimental hypothesis is that the quality of a domain class model is higher if its development is supported by a NLP system. the tool used for the experiment-named NL-OOPS - extracts classes and associations from a knowledge base realized by a deep semantic analysis of a sample text. In our experiments, we had groups working with and without the tool, and then compared and evaluated the final class models they produced. the results of the experiments give insights on the state of the art of NL-based Computer Aided software engineering (CASE) tools and allow identifying important guidelines to improve their performance, highlighting which of the linguistic tasks are more critical to effectively support conceptual modelling.

关键词： Natural language processing systems

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Modeling and control of the incremental software test process

Modeling and control of the incremental software test proces...

引用

IEEE Annual international Computer software and Applications conference (COMPSAC)

作者： S.D. Miller R.A. DeCarlo A.P. Mathur Computer Sciences Purdue University West Lafayette IN USA Electrical and Computer Engineering Purdue University West Lafayette IN USA

We present an overview of our current work in modeling and control of the software test process under an incremental life cycle. We first discuss the modeling primitives and their interaction to form a predictive mode... 详细信息

关键词： software testing predictive models Life testing Adaptive control Control engineering software development management Production Programming software quality Optimal control

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An approach for software reliability model selection

An approach for software reliability model selection

引用

IEEE Annual international Computer software and Applications conference (COMPSAC)

作者： C.A. Asad M.I. Ullah M.J.-U. Rehman Mohammad Ali Jinnah University Islamabad Pakistan

software reliability models are used for the estimation and prediction of software reliability. Selection of a software reliability model for use in a particular case has been an area of interest for researchers in the field of software reliability. Tools and techniques for software reliability model selection found in the literature cannot be used with a high level of confidence as they use a limited number of model selection criteria. In this paper, we have classified software reliability models according to software development life cycle (SDLC) phases. We have identified and defined a number of criteria (with importance level) for software reliability model selection. We have proposed an algorithm based on these criteria for the selection of software reliability models along with an example. this algorithm can be used in different phases of SDLC and applies to various classes of software reliability models.

关键词： software reliability software algorithms predictive models Programming software tools Reliability engineering Guidelines Computer applications Application software Data engineering

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A change impact dependency measure for predicting the maintainability of source code

A change impact dependency measure for predicting the mainta...

引用

IEEE Annual international Computer software and Applications conference (COMPSAC)

作者： F. Xia Computer Science Dept. University of Missouri-Rolla Rolla MO

We first articulate the theoretic difficulties with the existing metrics designed for predicting software maintainability. To overcome the difficulties, we propose to measure a purely internal and objective attribute of code, namely change impact dependency, and show how it can be modeled to predict real change impact. the proposed base measure can be further elaborated for evaluating software maintainability.

关键词： software maintenance software measurement Costs software quality Computer science Computer industry engineering management Maintenance engineering software design predictive models

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software effort prediction models using maximum likelihood methods require multivariate normality of the software metrics data sample: can such a sample be made multivariate normal?

Software effort prediction models using maximum likelihood m...

引用

IEEE Annual international Computer software and Applications conference (COMPSAC)

作者： V.K.Y. Chan Macao Polytechnic Institute Macao China

Missing data often appear in software metrics data samples used to construct software effort prediction models. So far, the least biased and thus the most strongly recommended family of such models capable of handling missing data are those using maximum likelihood methods. However, the theory of such maximum likelihood methods assumes that the data samples underlying the model construction are multivariate normal. Previous research on such models simply ignored the violation of such an assumption by the empirical data samples. this paper proposes and empirically illustrates a not-so-complicated but effective technique to transform the data sample for the purpose of meeting such an assumption. this technique is empirically proven to work for typical software metrics data samples and the author recommends applying such a technique in any further research on and practical industrial application of software effort prediction models using maximum likelihood methods

关键词： predictive models software metrics Maximum likelihood estimation Application software software engineering Electric breakdown Computer industry Particle measurements software measurement software systems

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Formal models for web navigations with session control and browser cache

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6th international conference on Formal engineering Methods

作者： Chen, J Zhao, XS Univ Windsor Sch Comp Sci Windsor ON N9B 3P4 Canada

ISBN: (纸本)3540238417

While providing better performance, transparency and expressiveness, the main features of the web technologies such as web caching, session and cookies, dynamically generated web pages etc. may also affect the correct understanding of the web applications running on top of them. From the viewpoint of formal verification and specification-based testing, this suggests that the formal models of the web applications we use for static analysis or test case generation should subsume the abstract behavior of their supporting environment. Here we provide the definition of such a model in terms of labelled transition systems from a given abstract description of the navigations of a web application by incorporating the abstract behavioral model of the web browsers in the presence of session control and browser cache. the significance of the work is twofold: on one hand, it provides a formal basis for better understanding of the web systems;on the other hand, it lays the ground work for both model checking and specification-based testing on the web applications where we take into account the affect of the internal mechanism to the correct web navigations, which can be quite sensitive to the security of the information they carry.

关键词： labelling transition systems operational semantics model checking specification-based testing web navigation web caching

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Efficient and effective simulation of memory maps for system-on-chip

Efficient and effective simulation of memory maps for system...

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international conference and Workshop on engineering of Computer-Based Systems

作者： G. Luculli

the design of complex system-on-chip (SOC) requires new methods and tools for the optimization of embedded software which is executed on ever more complex hardware architectures. the tuning of the memory subsystem is particularly difficult due to the many design parameters which are involved and the long time which is required to simulate different design configurations. We propose a very effective mechanism for the simulation of generic memory maps on architectures with instruction and/or data cache memory. An important characteristic of our implementation is its large flexibility: any memory map and any cache configuration can be simulated without the need to modify or to recompile the application code. We implemented such mechanism in our ISA retargetable environment and we showed that it loosely impacts the simulation performance.

关键词： System-on-a-chip Cache memory Embedded software Hardware Design optimization Computer architecture Memory architecture Instruction sets predictive models Microprocessors

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Semiconductor optical amplifier parameter extraction using a wideband steady-state numerical model and the Levenberg-Marquardt method

Semiconductor optical amplifier parameter extraction using a...

引用

international conference on Numerical Simulation of Optoelectronic Devices, (NUSOD)

作者： M.J. Connelly Optical Communications Research Group Department of Electronic and Computer Engineering University of Limerick Limerick Ireland

In this paper, an accurate wideband SOA steady-state numerical model, amplified spontaneous emission (ASE) spectrum and signal gain versus bias characteristic measurements and a numerical implementation of the Levenberg-Marquardt method are used to determine the material parameters of a homogeneous buried ridge stripe SOA with a bulk active region (0.4 /spl mu/m /spl times/ 0.4 /spl mu/m cross-section). the numerical techniques have been incorporated into comprehensive SOA simulation software AmpSoft developed at the University of Limerick that enables accurate wideband prediction of SOA static characteristics. the extracted SOA parameters are B/sub 0/ = 2.8 /spl times/ 10/sup -16/ m/sup 3/s/sup -1/ B/sub 1/= 0.1 /spl times/ 10/sup -41/ m/sup 6/s/sup -1/, A/sub nrad/ = 4.8 /spl times/ 10/sup 8/s/sup -1/ C/sub aug/ = 2.8 /spl times/ 10/sup -41/ m/sup 6/s/sup -1/, K/sub g/ = 0.48 /spl times/ 10/sup -10/ eVm, K/sub 0/= 2800 m/sup -1/ and K/sub 1/= 4400 m/sup 2/.

关键词： Semiconductor optical amplifiers Parameter extraction Steady-state Numerical models Wideband Spontaneous emission Gain measurement Optical materials Semiconductor materials predictive models

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thermal analysis of QFN packages using finite element method

Thermal analysis of QFN packages using finite element method

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thermal, Mechanical and Multiphysics Simulation and Experiments in Micro-Electronics and Micro-Systems EuroSimE

作者： Chia-Lung Chang Yow-Yi Hsieh Mechanical Engineering Department National Yunlin University of Science and Technology Yunlin Taiwan

the QFN (quad flat non-leaded) package is a new type of chip scale package. In this study, both the FEM solid model and CFD model of QFN package were generated to predict the junction-to-ambient thermal resistance of the package under natural and forced convection. the solid model uses flat plate surface convection correlations to simulate the package and board cooling. the CFD model uses computational fluid dynamics software to simulate surface convective loads. In comparison with experimental measurements, the results show that the CFD model is more accurate than the solid model to predict the thermal resistance of the package. the convection heat transfer coefficients obtained from CFD model were also applied to the surface correlations of FEM solid model. It shows that the accuracy of simulation results by FEM solid model can be improved with the surface convection correlations of CFD results. Furthermore, the distribution of heat transfer over external faces of the package is calculated. the results show that most of the heat is dissipated to the board through the bottom surface of the lead frame.

关键词： Finite element methods Solid modeling Computational fluid dynamics predictive models thermal resistance Surface resistance Computational modeling Chip scale packaging Heat transfer thermal force

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