نتایج جستجو برای: logitboost
تعداد نتایج: 116 فیلتر نتایج به سال:
The paper presents a study regarding the births that took place at the Bega Obstetrics and Gynecology Clinique, Timişoara, Romania in 2010. The analysis began from a dataset including 2325 births. The article presents a synthesis of the studies that analyze birth data. The Apgar score is the main subject in many studies. On one hand, researchers investigated the relation between the Apgar score...
Exploring the geological factors that affect fluid flow has always been a hot topic. For tight reservoirs, pore structure and characteristics of different lithofacies reveal storage status fluids in reservoir environments. The size, connectivity, distribution fillers sedimentary environments have posed challenge studying microscopic heterogeneity. In this paper, six logging curves (gamma-ray, d...
Abc-boost is a new line of boosting algorithms for multi-class classification, by utilizing the commonly used sum-to-zero constraint. To implement abc-boost, a base class must be identified at each boosting step. Prior studies used a very expensive procedure based on exhaustive search for determining the base class at each boosting step. Good testing performance of abc-boost (implemented as abc...
PURPOSE We have focused on finding a classifier that best discriminates between tumour progression and regression based on multiparametric MR data retrieved from follow-up GBM patients. MATERIALS AND METHODS Multiparametric MR data consisting of conventional and advanced MRI (perfusion, diffusion, and spectroscopy) were acquired from 29 GBM patients treated with adjuvant therapy after surgery...
In this paper, we present a fast method to detect humans from videos captured in surveillance applications. It is based on a cascade of LogitBoost classifiers relying on features mapped from the Riemanian manifold of region covariance matrices computed from input image features. The method was extended in several ways. First, as the mapping process is slow for high dimensional feature space, we...
Management of acute gastrointestinal bleeding necessitates the identification of the source of bleed. The source of bleeding which is clear in patients presenting with hematemesis, is unclear in the absence of it. Logistic regression, decision tree, naïve Bayes, LogitBoost and KNN models were constructed from non endoscopic data of 325 patients admitted via the emergence department (ED) for GIB...
Serodiagnosis of arthropod-borne viruses (arboviruses) at the Division of Vector-Borne Diseases, CDC, employs a combination of individual enzyme-linked immunosorbent assays and microsphere immunoassays (MIAs) to test for IgM and IgG, followed by confirmatory plaque-reduction neutralization tests. Based upon the geographic origin of a sample, it may be tested concurrently for multiple arboviruse...
Due to the recent overwhelming growth rate of large-scale data, the development of faster processing algorithms with optimal performance has become a dire need of the time. In this paper, we propose two novel algorithms, ADABOOST.PL (Parallel ADABOOST) and LOGITBOOST.PL (Parallel LOGITBOOST), that facilitate simultaneous participation of multiple computing nodes to construct a boosted classifie...
The students’ performance prediction (SPP) problem is a challenging that managers face at any institution. Collecting educational quantitative and qualitative data from many resources such as exam centers, virtual courses, e-learning systems, other not simple task. Even after collecting data, we might imbalanced missing biased different types strings, numbers, letters. One of the most common ch...
Heart failure is a very common disease, often silent threat. It's also costly to treat and detect. There steadily higher incidence rate of the disease at present. Although researchers have developed classification algorithms. Cardiovascular data were used by various ensemble learning methods, but efficiency was not high enough due cumulative error that can occur from any weak learner effect acc...
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