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Tytuł:
Receiver operating characteristic analysis of the FeNO biomarker in the diagnosis of asthma
Autorzy:
Biesiadecki, Marek
Galiniak, Sabina
Bartusik-Aebisher, Dorota
Aebisher, David
Powiązania:
https://bibliotekanauki.pl/articles/454725.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
asthma
nitric oxide
ROC curve
Opis:
Introduction. The fraction of exhaled nitric oxide (FeNO) is used as a non-invasive biomarker that reflects inflammation in the airways. It is so versatile that it used to control asthma severity as well as to monitor response to treatment. However, the exact cut-off point of the nitric oxide level which allows one to make a precise diagnosis of asthma is unclear. Aim. To examine the possibility of using advanced statistical methods such as receiver operating characteristic for the analysis of FeNO concentrations for improving the diagnosis of asthma. Materials and methods. Receiver operating characteristic (ROC) was used for analyzing results to determine levels of nitric oxide which may be a prognostic indicator of asthma. The studied group consisted of 111 children including 69 asthmatic patients, and 42 age- and sex-matched healthy subjects. Measurement of exhaled nitric oxide was conducted in all subjects included in this study. Results. FeNO level was higher in asthmatic patients. The analysis of results showed that the cut-off point for the FeNO concentration is 11.5 ppb. Sensitivity and specificity with the FeNO level allowed us to determine a value of the diagnostic variable of FeNO concentration of 14.0 ppb. A comparison of FeNO level and sex of the subjects showed there is no correlation between these parameters of patients. Conclusions. Currently, the FeNO measurement provides complementary d
Źródło:
European Journal of Clinical and Experimental Medicine; 2018, 4; 253-258
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Predicting bankruptcy of agriculture companies : validating selected models
Prognozowanie upadłości spółek rolnych : weryfikacja wybranych modeli
Autorzy:
Karas, M.
Reznakova, M.
Pokorny, P.
Powiązania:
https://bibliotekanauki.pl/articles/406121.pdf
Data publikacji:
2017
Wydawca:
Politechnika Częstochowska
Tematy:
bankruptcy prediction models
ROC curves
agriculture
modele predykcji bankructwa
krzywe ROC
rolnictwo
Opis:
Many bankruptcy prediction models have been published so far, most of them were especially designated for the manufacturing companies. According to several studies, these models are inappropriate for other industries, as such application would be connected with a significantly lower accuracy than could be expected. The aim of this paper is to analyse the current accuracy of four traditional bankruptcy prediction models in the field of agriculture. The results showed that these models are less accurate in this field in comparison with the original results. This motivates the effort of deriving new models that would be specially developed for agriculture business.
Dotychczas opublikowano wiele modeli predykcji bankructwa, większość została przeznaczona dla firm produkcyjnych. Według badań, modele te są nieodpowiednie dla innych gałęzi przemysłu, ponieważ takie zastosowanie wiązałoby się ze znacznie niższą dokładnością, niż można byłoby się spodziewać. Celem niniejszego artykułu jest analiza aktualnej dokładności czterech tradycyjnych modeli predykcji bankructwa w rolnictwie. Wyniki wykazały, że modele te są mniej dokładne w tej dziedzinie w porównaniu z pierwotnymi wynikami. Motywuje to wysiłek do wyprowadzania nowych modeli, które zostałyby specjalnie opracowane dla przedsiębiorstw rolniczych.
Źródło:
Polish Journal of Management Studies; 2017, 15, 1; 110-120
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On some Inferential Procedures for Receiver Operating Characteristic Curves
O pewnych tekstach dla krzywych operacyjno-charakterystycznych
Autorzy:
Rossa, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/906881.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
ROC curve
goodness-of-fit tests
Opis:
In the paper two significance tests for receiver operating characteristic curves (ROC) are proposed. Both tests use an asymptotic χ² distribution of the test statistics.
W pracy zaproponowano dwa testy istotności dla krzywych operacyjno-charakterystycznych (ROC), oparte na asymptotycznym rozkładzie statystyk testowych χ².
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2007, 206
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ESTIMATING THE ROC CURVE AND ITS SIGNIFICANCE FOR CLASSIFICATION MODELS’ ASSESSMENT
Autorzy:
Gajowniczek, Krzysztof
Ząbkowski, Tomasz
Szupiluk, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/453918.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
ROC curve
AUC
classification models’ assessment
Opis:
Article presents a ROC (receiver operating characteristic) curve and its application for classification models’ assessment. ROC curve, along with area under the receiver operating characteristic (AUC) is frequently used as a measure for the diagnostics in many industries including medicine, marketing, finance and technology. In this article, we discuss and compare estimation procedures, both parametric and non-parametric, since these are constantly being developed, adjusted and extended.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2014, 15, 2; 382-391
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Logistic regression and classification tree methods as elements of diagnosis in cardiology
Metody regresji logistycznej i drzewa klasyfikacyjnego jako elementy procesu diagnostycznego w dziedzinie kardiologii
Autorzy:
Spychała, Anna
Skrzypek, Michał
Niewiadomska, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/1036433.pdf
Data publikacji:
2016
Wydawca:
Śląski Uniwersytet Medyczny w Katowicach
Tematy:
stroke
logistic regression
statistical analysis
classification tree
roc curve
udar
regresja logistyczna
analiza statystyczna
drzewo klasyfikacyjne
krzywa roc
Opis:
INTRODUCTION: The purpose of statistical analysis in research is to identify accurate and reliable conclusions where the researcher has a great deal of sources and information. Usually, one can point to a few different methods that allow the task to be fulfilled, but each time the question arises: which one to choose? MATERIAL AND METHODS: The study was conducted using a database that included 3246 patients in the Second Department of Cardiology, Silesian Medical Centre in Katowice-Ochojec in 2003–2008. We were A model in which the STROKE dependent variable was considered was subjected to statistical analysis, and the results of the analysis suggested selecting the following variables: gender, transfusion, PTCA, IVA, IVM, SVA, aneurysm and hematocrit. RESULTS: The essential factors affecting the occurrence of stroke, according to logistic regression are: aneurysm, transfusion of blood components, prior treatment with PTCA and according to the classification tree: aneurysm and level of hematocrit. CONCLUSIONS: The results achieved by both the two statistical models complemented each other, and by combining them one is able to obtain reliable information to use as a base for the decision-making process.
WSTĘP: Zadaniem analiz statystycznych w badaniach naukowych jest wskazanie trafnych i maksymalnie wiarygodnych wniosków w sytuacji, gdy badacz dysponuje wieloma informacjami. Zwykle można wskazać kilka różnych metod, które pozwalają to zadanie spełnić, jednak za każdym razem nasuwa się pytanie, którą z nich wybrać? MATERIAŁ I METODY: Badania zostały przeprowadzone na bazie danych, która obejmowała 3246 pacjentów przebywających na II Oddziale Kardiologii Górnośląskiego Centrum Medycznego w Katowicach-Ochojcu w latach 2003– –2008. Analizie statystycznej poddano model, w których za zmienną zależną uznano zmienną UDAR, natomiast wyniki przeprowadzonych analiz zasugerowały dobór następujących zmiennych objaśniających: płeć, przetoczenie, PTCA, IVA, IVM, SVA, tętniak i hematokryt. WYNIKI: Czynnikami istotnie wpływającymi na wystąpienie udaru, według regresji logistycznej, są: tętniak, przetoczenie składników krwi i przebyty zabieg PTCA, natomiast według drzewa klasyfikacyjnego – tętniak i poziom hematokrytu. WNIOSKI: Wyniki uzyskane za pomocą obydwu modeli statystycznych dopełniały się, a ich łączenie pozwala na uzyskanie wiarygodnych informacji, stanowiących podstawę procesu decyzyjnego.
Źródło:
Annales Academiae Medicae Silesiensis; 2016, 70; 154-162
1734-025X
Pojawia się w:
Annales Academiae Medicae Silesiensis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Empirical and Kernel Estimation of the ROC Curve
EMPIRYCZNY I JĄDROWY ESTYMATOR KRZYWEJ ROC
Autorzy:
Baszczyńska, Aleksandra Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/654315.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
krzywa ROC curve
empiryczny estymator
metoda jądrowa
parametr wygładzania
funkcja jądra
ROC curve
empirical estimator
kernel method
smoothing parameter
kernel function
Opis:
W pracy rozważane są wybrane metody estymacji krzywej ROC (Receiver Operating Characteristic), w tym metody parametryczne i nieparametryczne. Podejście nieparametryczne może oznaczać zastosowanie empirycznego estymatora krzywej ROC lub  estymatora jądrowego. Podjęta jest próba porównania estymacji empirycznej oraz jądrowej ze szczególnym uwzględnieniem wpływu liczebności próby, jak również metody wyboru parametru wygładzania i funkcji jądra na rezultat procedury estymacyjnej. W oparciu o wyniki badania symulacyjnego określone są wskazówki użyteczne w procedurach estymacji krzywej ROC.
The paper presents chosen methods for estimating the ROC (Receiver Operating Characteristic) curve, including parametric and nonparametric procedures. Nonparametric  approach may involve the use of empirical method or kernel method of the ROC curve estimation. In the analysis, an attempt of comparison of empirical and kernel ROC estimators is done, considering the impact of sample size, choice of smoothing parameter and kernel function in kernel estimation on the results of the estimation. Based on the results of simulation studies, some suggestions, useful in the procedures of nonparametric ROC curve are determined.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2015, 1, 311
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of Beneish M-scores to reveal creative accounting: evidence from Slovakia
Autorzy:
Durana, Pavol
Blazek, Roman
Machova, Veronika
Krasnan, Miroslav
Powiązania:
https://bibliotekanauki.pl/articles/22443167.pdf
Data publikacji:
2022
Wydawca:
Instytut Badań Gospodarczych
Tematy:
Beneish model
creative accounting
earnings management
ROC curve
Opis:
Research background: In creative accounting, the primary goal of every enterprise is to increase and strengthen its market position. Over the years, manipulation of financial statements has also reached the territory of Central European countries, including the Slovak Republic. Therefore, an analysis was conducted to identify enterprises that handle accounting. This article focuses specifically on Sector A: agriculture, forestry, and fisheries. Purpose of the article: The aim of the article was to reveal the creative accounting practices of a sample of enterprises operating in the Slovak business environment in a sector using the Beneish model. Methods: The Beneish model was used to calculate the manipulation of enterprises? financial statements. Both variants, that is, the 5-parameter model and 8-parameter model, were used for the calculation. The results of these models were plotted using graphs and receiver operating characteristic (ROC) curves. Findings & value added: Based on the use of both variants of the Beneish model, it was proven that enterprises in the analyzed sector use the possibility of manipulating financial statements. The added value of the article is the detection of the use of creative accounting in a specific sector, which makes the study original in its application and space-time orientation.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2022, 17, 2; 481-510
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving ROCs of Constant False Alarm Coded Anti-collision Radar in Very Noised Cases
Autorzy:
Zaidouni, J.
Menhaj, A.
Ghoumid, K.
Mekaoui, S.
El Moussati, A.
El Hillali, Y.
Powiązania:
https://bibliotekanauki.pl/articles/226388.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
automotive radar
anticollision
detection
ROC
false alarm
correlation receiver
Opis:
The use of Constant False Alarm Coded Anticollision Radar (CFACAR) is very interesting in automotive environment. Due to the orthogonality properties of used codes this system is most robust to multi-user interferences. The actual version of the receiver called in this paper Single Correlation Receiver (SCR), is not able to detect the targets in very low input Signal to Noise Ratio (SNR). To resolve this problem, we present a new receiver called Averaging Correlation Receiver (ACR), that computes the average of the M later correlations. Then, we developed the expression of detection and false alarm probabilities for the new receiver in mono and multi-user scenarios. These probabilities are used to plot the new Receiver Operating Characteristics (ROCs). They are drawn for different values of input SNR and length M of ACR. There is a suitable value of M, according to some equation, that can be taken to have a good detection (ROCs more perfect). Also, we found that for a fixed SNR, we must increase sufficiently the length M but it is possible only for low relative velocity of the target. For a velocity of 5 K m/h with M = 1055, we can lessen the value of the SN R until we reach SN R = – 45 dB.
Źródło:
International Journal of Electronics and Telecommunications; 2017, 63, 2; 127-135
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ON THE SELECTED METHODS FOR EVALUATING CLASSIFICATION MODELS
Autorzy:
Misztal, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/655797.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
classifier performance
predictive ability
ROC curve
reclassification
decision curve
Opis:
Traditional measures for assessing the performance of classification models for binary outcomes are the ROC curve and the area under the ROC curve (AUC). Reclassification tables (Cook, 2008), net reclassification improvement (NRI) and integrated discrimination improvement (IDI) (Pencina et al., 2008) or decision – analytic measures with decision curve analysis (Vickers & Elkin, 2006) have been recently proposed for evaluating the predictive ability of classifiers. This paper analyzes the measures mentioned above with some credit taking application.  
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2014, 3, 302
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of differential serum expression of three factors and pulmonary function in patients with silicosis
Autorzy:
Zhu, Ying
Duan, Xia Yu
Cheng, Yun Qi
Yao, Xin Jing
Xu, Hong
Zhang, Kui Sheng
Li, Feng Shi
Yang, Fang
Liu, Liang He
Yuan, Xiang Ju
Powiązania:
https://bibliotekanauki.pl/articles/2086531.pdf
Data publikacji:
2021-08-05
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
silicosis
pulmonary function
early diagnosis
ROC
PTPN2
factor B
Opis:
ObjectivesSilicosis is a chronic occupational lung disease. As was previously found by the authors, some proteins increased in the lung tissue of activated rats, and protein tyrosine phosphatase non-receptor type 2 (PTPN2), factor B, and vaccinia-related kinase 1 (VRK1) showed highly differential expressions.Material and MethodsIn this study, serum and bronchoalveolar lavage fluid samples were collected from patients with silicosis and healthy people to verify the expression of PTPN2, factor B, and VRK1. The diagnostic value of differentially expressed proteins for silicosis was judged.ResultsThe expression levels of serum PTPN2, VRK1, and factor B in patients with silicosis were significantly higher than those in the control group (p < 0.01). Higher serum PTPN2 and factor B concentrations significantly and negatively correlated with the ratio of forced expiratory volume in 1 s to forced vital capacity (FEV1/FVC), maximum vital capacity (VCmax), FEV1, and FVC, suggesting that the high expression of PTPN2 and factor B is associated with decreased pulmonary ventilation function and restrictive ventilatory impairment in patients with silicosis. All area under curve (AUC) measurements generated from single detection events were >0.744, with PTPN2 reaching the highest value (0.858). The AUC, sensitivity, and specificity for the combined diagnosis using factor B and PTPN2 were 0.907, 86.91% and 85.07%, respectively, for factor B and PTPN2. The 3 differentially expressed proteins are potential classes of predictive biomarkers for silicosis.ConclusionsRegarding the economy and test practicality, the best diagnostic combination is factor B and PTPN2 for the analysis of AUC, sensitivity and specificity.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2021, 34, 4; 527-540
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimating the probability of leaving unemployment for older people in Poland using survival models with censored data
Autorzy:
Grzenda, Wioletta
Powiązania:
https://bibliotekanauki.pl/articles/20311945.pdf
Data publikacji:
2023-06-13
Wydawca:
Główny Urząd Statystyczny
Tematy:
employment
older workers
proportional hazard model
time-dependent ROC curve
Opis:
Current demographic changes require greater participation of people aged 50 or older in the labour market. Previous research shows that the chances of returning to employment decrease with the length of the unemployment period. In the case of older people who have not reached the statutory retirement age, these chances also depend on the time they have left to retirement. Our study aims to assess the probability of leaving unemployment for people aged 50-71 based on their characteristics and the length of the unemployment period. We use data from the Labour Force Survey for 2019–2020. The key factors determining employment status are identified using the proportional hazard model. We take these factors into account and use the direct adjusted survival curve to show how the probability of returning to work in Poland changes as people age. Due to the fact that not many people take up employment around their retirement age, an in-depth evaluation of the accuracy of predictions obtained via the models is crucial to assess the results. Hence, in this paper, a time-dependent ROC curve is used. Our results indicate that the key factor that influences the return to work after an unemployment period in the case of older people in Poland is whether they reached the age of 60. Other factors that proved important in this context are the sex and the education level of older people.
Źródło:
Statistics in Transition new series; 2023, 24, 3; 241-256
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of levels of selected trace elements as predictors of oxidative stress in type 2 diabetic patients using Multivariate Statistical Analysis
Autorzy:
Khedr, Y.
Badran, M.
Powiązania:
https://bibliotekanauki.pl/articles/1192781.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
type 2 diabetes
trace elements
oxidative stress
ROC curve
VIP score
Opis:
Disturbances in levels of trace elements and oxidative stress are associated with the glycemic status, which is implicated in the development and progression of diabetes. The present study was conducted on 50 patients with type 2 diabetes, 40 years of age, gender and body mass index matched with healthy controls (Damanhur Educational Hospital, El Beheira, Egypt). Fasting blood glucose (FBG), serum catalase, paraoxonase activity, and malondialdehyde (MDA) levels were measured spectrophotometrically. The blood serum was digested and then used to determine the levels of seven trace elements, such as Cr, Fe, Cu, Zn, Cd, As and Se, using inductive coupled plasma mass spectroscopy (ICP-MS). The mean of serum catalase, paraoxonase activities and the concentration of Fe, Se, Zn, and Cd were significantly decreased, whereas the level of malondialdehyde (MDA) and the concentrations of Cu, Cd and As were significantly higher in type 2 diabetic group compared with the control group. The multivariate receiver operating characteristic (ROC) curve and variable importance in projection (VIP) scores were used to analysis the data. VIP score revealed that As, Fe and Se were strongly associated with the oxidative stress in type 2 diabetic patients. The best cut-off values for serum concentrations of Fe, Se and As were 46.78, 215 and 1.01 μg L-1, respectively, which discriminated between diabetic patients with oxidative stress from the control group. The study showed that changes in trace element concentrations in diabetic patients may contribute to the lowering of antioxidant enzymes t, further leading to the progress of T2DM.
Źródło:
Journal of Elementology; 2021, 26, 1; 47-58
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of predictive capabilities of quantitative cardiotocographic signal features
Autorzy:
Czabański, R.
Jeżewski, M.
Roj, D.
Szaszkowski, Z.
Kupka, T.
Wróbel, J.
Powiązania:
https://bibliotekanauki.pl/articles/332937.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
monitorowanie płodu
tętno płodu
klasyfikacja sygnału
fetal monitoring
fetal heart rate
signal classification
ROC analysis
Opis:
Cardiotocography (CTG) is the main method of assessment of the fetal state during pregnancy and labour used in clinical practice. It is based on quantitative analysis of fetal heart rate, fetal movements and uterine contractions signals. The evaluation of the CTG signals can be made using criteria recommended by International Federation of Obstetrics and Gynecology. Nevertheless, the diagnosis verification is possible only after the delivery on the basis of newborn assessment. In the proposed work we evaluated the capacity of quantitative analysis of CTG traces in predicting fetal outcome. The relationship between CTG signal features and attributes of fetal outcome was assessed on the basis of ROC curves analysis. The obtained results indicate the adequate predictive capabilities of the selected CTG features especially for fetal outcome assessed with Apgar score and suggest the necessity of applying the criteria for the CTG traces evaluation that are related to the gestational age. Our study also shows the value of the CTG monitoring as a screening procedure providing appropriate confirmation of fetal wellbeing.
Źródło:
Journal of Medical Informatics & Technologies; 2010, 16; 11-17
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ranking-Based Choice of Regressors in Probability Models
Dobór zmiennych objaśniających w modelach prawdopodobieństwa w oparciu o krzywe ROC oraz CAP
Autorzy:
Schab, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/906271.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Receiver Operating Curve (ROC)
Cumulative Accuracy Profile (CAP)
AUROC statistics
Gini statistics
choice of regressors
Opis:
W artykule przedstawiono propozycję wykorzystania krzywych ROC (Receiver Operating Characteristic) i CAP (Cummulative Accuracy Profile) w doborze zmiennych objaśniających w modelu prawdopodobieństwa. Kryterium doboru zmiennych opiera się na wartościach miar dyskryminacji wyznaczonych na podstawie krzywych ROC/CAP jak i uwzględnia sam kształt krzywych.
The article presents a proposal of using the Receiver Operating Characteristic (ROC) and Cumulative Accuracy Profile (CAP) curves as a ranking-based method for a choice of regressors in probability model. The criterion of reggresors’ choice uses the value of summary statistics of discrimination based on ROC/CAP curves as well as it takes into account the shape of the curves itself.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2009, 228
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical Investigation of Different Diversity Combining Techniques in Cognitive Radio
Autorzy:
Agarwal, R.
Srivastava, N.
Katiyar, H.
Powiązania:
https://bibliotekanauki.pl/articles/309425.pdf
Data publikacji:
2018
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
cognitive radio
complementary ROC
post examining selection
probability of detection
probability of false alarm
switch combining
examine combining
Opis:
In this paper, the performance of an energy detector in cognitive radio, using different diversity combining techniques, is evaluated. Among many diversity combining techniques, maximal ratio combining (MRC) gives the best results but at the cost of the highest complexity. To design a simpler receiver, it is suggested to use less complex combining techniques, i.e. switched diversity, which provides one of the least complex solutions to combat fading. The paper analyzes two switched diversity schemes, switch examine combining (SEC), and switch examine combining with post examining selection (SECp). A closed form expression determining the probability of detection using MRC, SEC and SECp is derived for various numbers of branches. Detection performance with different diversity combining techniques is compared and the complexity trade-off is observed.
Źródło:
Journal of Telecommunications and Information Technology; 2018, 3; 64-69
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 19

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