作者:
Wabnig, H.Haring, G.University of Vienna
Institute of Applied Computer Science and Information Systems Department of Advanced Computer Engineering Lenaugasse 2/8 ViennaA-1080 Austria
In the PAPS-parallel program performance prediction toolset-parallel systems are specified by the structure of the parallel program, the multiprocessor hardware, and the mapping of the program elements to processor no...
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the next generation of power semiconductor devices will be designed and optimized to meet the specific application requirements. Resonant dc link concept is gaining wide popularity in a range of soft-switching applica...
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the next generation of power semiconductor devices will be designed and optimized to meet the specific application requirements. Resonant dc link concept is gaining wide popularity in a range of soft-switching applications because of superior power conversion efficiency and improved overall system reliability. Mixed-mode simulations are used to study the carrier dynamics in non punchthrough IGBT structures during turn-off under soft- and hard-switching conditions. the simulation results are shown to qualitatively predict the measured bump in the tail current with varying output dv/dt conditions.
Image analysis and ultrasound techniques, after being effectively used for live animals in our research, were used to estimate and predict intramuscular fat (present fat) for 378 hot carcasses in a packing plant in Mi...
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Image analysis and ultrasound techniques, after being effectively used for live animals in our research, were used to estimate and predict intramuscular fat (present fat) for 378 hot carcasses in a packing plant in Minnesota. Image textural and statistical analysis approaches, both in the frequency spectrum domain and in the gray-tone intensity domain, were performed on the B-mode images to extract image features for tissue characterization and to develop prediction models for percent fat. A quality evaluation and prediction (QEP) software was also developed for automatic image analysis and percent fat prediction. Validation testing of these models showed very good prediction accuracy. the root mean square errors were around .93 to .96, the correlation coefficients for the predicted percent fat versus actual values were .74 to .81, and about 83 to 90 percent of the predicted residual errors were less than 1.5%. the results indicate that the percent fat prediction and the image analysis algorithms may be a valuable tool for beef quality evaluation and prediction for meat industries and livestock producers.< >
Historically. progress in image coding tecliniqnes has been made by incorporating resnits from other fields SUCh as information theory. Most of the existing coding methods such as predictive coding. transform coding, ...
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ISBN:
(纸本)081941638X
Historically. progress in image coding tecliniqnes has been made by incorporating resnits from other fields SUCh as information theory. Most of the existing coding methods such as predictive coding. transform coding, and vector quantization belong to information-theory-based methods in which image signals are considered as ranidoni signals aiid compressed by exploiting their stochastic properties. Apart from these iiiformation-tlieoretic coding iniethods, research on new approaches such as modelbased coding (which is related to 1)0th image analysis and computer graphics) has recently intensified. An essential difference between conventional coding methods and these new approaches is the image model they assume. Contrary to conventional coding methods which efficiently represent 2-D waveforms of image signals model-based co ding represent iniage signals using structural image models which take into accomit the 3-D properties of the scene in some sense. there have been two major approaches to model-based image coding. One approach uses general niodels such as planar patches and sniooth surfaces to represent the 3-D properties of the oI)jects [11, 19, 28. 31, 33. 36, 39. 40, 43]. the other approach utilizes detailed 1)arameterized 3-D object models such as a parameterized facial model [2. 6, 13. 15. 17, 22. 24. 2G. 32, 35. 41. 47, 48. 49. 51. 54]. TIne former approach has been discussed in the context of advanced motion compensation. the latter approach is clearly different from the conventional approaches. since it uses an explicit 3—D model and encodes images with coniputer—vision— Oiieiite(il tecliniques an(I 1eJ)1()(luces iniages with colnj)uter—grapllics—oriented techniques . Both approaches will potentially achieves very low l)it rate video compression. Iii the following sectionis. unage co(ling schemes are described froni the point of view of their associated image IIli)delS. Amoiig our works related to these paradignins in the Univ. of Tokyo [2. 3, 4. 8, 9, 10,
the authors present an automated modeling technique which can be used as an alternative to regression techniques to improve the quality of the software development process. the modeling process will allow for the reli...
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the authors present an automated modeling technique which can be used as an alternative to regression techniques to improve the quality of the software development process. the modeling process will allow for the reliable detection of potential problem areas and for the interpretation of the cause of the problem so that the most appropriate remedial action can be taken. It is shown that it can be used to facilitate the identification and aid the interpretation of the significant trends which characterize high risk components in several Ada systems. the effectiveness of the technique is evaluated based on a comparison with logistic regression based models.< >
this paper introduces an integrated environment for software reliability modeling. the environment consists of three major components: (1) a software reliability modeling tool SMERFS adapted to fit our development env...
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this paper introduces an integrated environment for software reliability modeling. the environment consists of three major components: (1) a software reliability modeling tool SMERFS adapted to fit our development environment; (2) a general data analysis environment in S-PLUS customized for software reliability modeling; and (3) some supporting programs written in C and AWK. this environment has been successfully used in the IBM Programming Systems Toronto Lab.< >
the authors present an approach that combines process modeling with process assessments. they use the structured analysis and design technique (SADT) modeling notation (D.A. Marca and C.L. McGowan, 1988). the DoD CIM ...
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the authors present an approach that combines process modeling with process assessments. they use the structured analysis and design technique (SADT) modeling notation (D.A. Marca and C.L. McGowan, 1988). the DoD CIM Initiative has standardized on a subset of SADT, called IDEF0, to model business processes. A SADT (IDEF0) model was created of a large software maintenance process and the model led to process improvements that might have been missed otherwise. this model based process assessment approach is described as a process in its own right.< >
Reports on an empirical investigation of Albrecht function points. they investigated the constituent elements of the function point counts to determine whether all the elements are required to provide a valid measure ...
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Reports on an empirical investigation of Albrecht function points. they investigated the constituent elements of the function point counts to determine whether all the elements are required to provide a valid measure of size; whether the sum of all the elements is a better predictor of effort than the constituent elements; and whether the complexity adjustments are necessary. the study suggests that function points are not well-formed metrics because there is a correlation between their constituent elements. It also suggests that for the dataset under investigation, two of the constituent elements were as good at predicting effort as the raw function point count and that the unweighted counts can be reasonable predictors of effort.< >
Two computer models for analysis of transient behaviour of earthing systems based on the electromagnetic theory have been developed. the computer models are based on different mathematical models and different numeric...
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Two computer models for analysis of transient behaviour of earthing systems based on the electromagnetic theory have been developed. the computer models are based on different mathematical models and different numerical techniques are applied. the first goal of the analysis is to compute the longitudinal current distribution in the earthing electrodes. then once the currents are determined, other parameters of interest such as near fields, voltages, leakage currents, impedance, etc. may be determined by further calculations. In this paper the emphasis is given to computation of the induced overvoltages in circuits placed near the earthing systems in case of lightning. Comparison withthe previous, more simplified computer models, shows that new models predict much greater induced transient voltages.< >
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