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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 115 for “"Characteristic curve"”.
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The Stability of Item Characteristic Curve Parameters Across Groups
Made available in DSpace on 2014-12-10T18:45:46Z (GMT). No. of bitstreams: 1 7212437.pdf: 2942822 bytes, checksum: a27bf75446c99a9fc069cb6fae856e7c (MD5) Previous issue date: 1971
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A stepwise test characteristic curve method to detect item parameter drift
… may not be ideal when only the overall test characteristic curve (TCC) is of interest to the users. One such occasion in common practice is IRT-based true score equating, where the goal is to create a conversion table to make the two TCCs as close as possible. This paper introduces a stepwise …
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Theory and applications of nonparametric regression in item response theory
… estimation of latent abilities and item characteristic curves is considered. In particular, the joint asymptotic properties of ordinal ability estimation and kernel smoothed nonparametric item characteristic curve estimation is investigated under relatively unrestrictive assumptions on …
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Flow Mechanisms and Transient Pressure Analysis Study For Multi-Stage Fractured Horizontal Wells In Shale Gas Reservoirs
… unconventional natural gas resource, has the characteristics of low porosity and low permeability. Therefore, the fractured horizontal well technology has been widely used in shale gas reservoir development. At the same time, more and more attention has been paid to the study of seepage …
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A Study of the Robustness of the Three-Parameter Item Response Model
… The accuracy of the person ability and item characteristic curve parameter estimates derived by the three-parameter item response model was evaluated. Data sets and distributions of person ability and item characteristic curve parameters were generated using a computer-based algorithm, AVRAM …
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The design, construction, and test of a simplex carrier current system
… portion of the grid voltage plate current characteristic curve during a large portion of each cycle, thus introducing third order, fourth order, fifth order, and nth order distortion terms.* * It is to be remembered that the plate current can be expressed as a power series of n terms of the …
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Models of binaural hearing for sound lateralisation and localisation
… disparity is compared. The first model, the characteristic-curve (CC) model acquires the best estimate of a source location by finding the nearest-neighbour of the target ITD and ILD in the characteristic curve of free-field interaural disparities. On the other hand, the second model, the …
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Measuring Appropriateness in the Assessment of Job Satisfaction
Latent trait theory or item characteristic curve theory has provided new insights into old problems in the measurement of mental aptitude. There are, however, several assumptions of the theory that may, on the surface, appear to restrict applications of the model. The assumptions that the test is …
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Ensemble Support Vector Machine Models of Radiation-Induced Lung Injury Risk
… cross-folded area under the receiver operating characteristic curve while maintaining model parsimony. Finally, we extend our model with John C. Platt's method to support non-binary outcomes in order to augment clinical relevancy.
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Serum markers for predicting significant necroinflammatory activity in patients with chronic hepatitis B
… score 1.962. The area under receiver operating characteristic curve of the SI score was 0.831. The sensitivity, specificity, positive predictive value and negative predictive value of the SI score were 79.5%, 70.8%, 76.8% and 74.3%, respectively. CONCLUSIONS: A simple scoring system including …
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Sample Size Formulas For Estimating Areas Under the Receiver Operating Characteristic Curves With Precision and Assurance
The area under the receiver operating characteristic curve (AUC) is commonly used to quantify the discriminative ability of tests with ordinal or continuous test data. When planning a study to evaluate a new test, it is important to determine a minimum sample size required to achieve a prespecified …
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Detecting basal cell carcinoma in skin histopathological images using deep learning
… obtained an area under the receiver operating characteristic curve (AUC) of 0.981. Finally, we used our patch classifiers to generate a bag of scores for a given whole slide image (WSI), and attempted multiple ways of combining these scores to produce a single significant score to predict the …
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Adsorption of water vapor by selected containment aerosols : chlorides and cement dust
… data on all these adsorbents provided a single characteristic curve when correlated according to Polanyi's potential theory. Hysteresis was observed upon desorption for cesium chloride and containment concrete samples. The isosteric heats of adsorption were calculated at different loadings. The …
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Non-Pedophilic Heterosexual Male Response to Affinity 2.0
… is temporally stable and would provide a characteristic response curve for normal heterosexual male sexual interest. This study examined the Affinity 2.0, a newly standardized viewing time (VT) instrument that purports to measure sexual interest. More specifically, the Affinity 2.0 was …
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On the performance of convolutional neural networks initialized with Gabor filters.
… in accuracy, Area Under ROC (Receiver Operating Characteristic) Curve (AUC), minimum loss, and speed in some cases based on the complexity of the dataset.
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The Trapped Charge Interfacial Modulation of the Electron Beam Induced Current in Metal Oxide Semiconductor Capacitors
… a function of the applied gate bias to plot the characteristic curve which determines the magnitude of the TCIM turn-off transient and which accounts for the memory hysteresis of the device.
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Problems related to efficacy measurement and analyses
… to the estimation of the ROC (Receiver Operating Characteristic) curve as well as to the implementation of nonparametric regression of ROC. The area under the ROC curve (AUC), which is exactly equal to the quantity P(Y>X), is also explored in this dissertation. The methodology used for this study …
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Analysis of single-phase rectifier circuits
… diode was considered. The voltage-current characteristic curve of a diode was assumed linear, and the equivalent resistance of the tube was chosen equal to the reciprocal of the slope of the diode characteristic curve in the conducting region. For the capacitive filtering case, the …
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Effects of soil moisture, soil carbonate and organic matter content on vapor phase sorption of volatile organic compounds using inverse gas chromatography
… moisture. Non-reversibility in the water characteristic curve of water had significant implications for the sorption of VOCs in the soils. Sorption coefficients in the soil were not reversible when the relative humidity was incrementally increased and then decreased between 52% and 87%. …
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A comparative analysis of machine learning algorithms for genome wide association studies
… in terms of area under the receiver operating characteristic curve (AUC). Conclusively, the logistic regression model with binary classification seems to be the most promising one among the other four algorithms, as it outperformed the other tools in the AUC value.
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