نتایج جستجو برای: cut point
تعداد نتایج: 589103 فیلتر نتایج به سال:
We present an infinitary and a finitary cut–free axiomatization for a fragment of the modal μ–calculus in which nesting of fixed points is restricted to non–interleaving occurrences. In this study we prove soundness and completeness of both axiomatizations. Completeness is established by constructing a canonical countermodel to any non– provable formula using an extension of the method of satur...
The reconstruction of 3D objects from a point-cloud is based on sufficient separation of the points representing objects of interest from the points of other, unwanted objects. This operation called segmentation is discussed in this paper. We present an interactive unstructured pointcloud segmentation based on graph cut method where the cost function is derived from euclidean distance of point-...
In biomedical research and practice, continuous biomarkers are often used for diagnosis and prognosis, with a cut-point being established on the measurement to aid binary classification. When survival time is examined for the purposes of disease prognostication and is found to be related to the baseline measure of a biomarker, employing a single cut-point on the biomarker may not be very inform...
The following problem is known as group testing problem for n objects. Each object can be essential (defective) or non-essential (intact). The problem is to determine the set of essential objects by asking queries adaptively. A query can be identified with a set e of objects and the query e is answered by I if p contains at least one essential object and by 0 otherwise. In the statistical setti...
In this research anxiety and depression and their association with 32 different factors in students of Hamedan University of Medical Sciences were measured. Levels of anxiety and depression were assessed by State-Trait Anxiety Inventory (from 2, Trait) and Beck Depression Inventory. A questionnaire made of demographic data, educational and noneducational activities, the presence of medical or p...
Platelet reactivity unit (PRU) in patients undergoing elective PCI: Rethinking the optimal cut point
High residual platelet reactivity (PR) in patients on clopidogrel therapy is associated with thrombotic events after percutaneous coronary intervention (PCI) with drug-eluting stents. It is well documented that determining an optimal PR cut-off point helps to better predict major adverse cardiovascular events (MACE). In addition, determining the optimal PR cut-off point helps to sufficiently su...
A local cut point is by definition a point that disconnects its sufficiently small neighborhood. We show that there exists an upper bound for the degree of a local cut point in a metric measure space satisfying the generalized Bishop–Gromov inequality. As a corollary, we obtain an upper bound for the number of ends of such a space. We also obtain some obstruction conditions for the existence of...
Previous screening trials for early detection of ovarian cancer in postmenopausal women have used the standard CA125 cut-point of 35 U/mL, the 98th percentile in this population yielding a 2% false positive rate, whereas the same cut-point in trials of premenopausal women results in substantially higher false positive rates. We investigated demographic and clinical factors predicting CA125 dist...
BACKGROUND Fetal nuchal translucency (NT) measurement is now widely used in many Western countries as a screening tool for Down's syndrome during the first trimester. However, at present there is no data on its use in Taiwan. The purpose of the present study was to evaluate the efficacy of NT measurement in first-trimester Down's syndrome screening in Taiwan. METHODS We conducted a prospectiv...
New proposed criteria for the clinical diagnosis of Alzheimer's disease increasingly incorporate biomarkers, most of which are normally measured on a continuous scale. Operationalizing such criteria thus requires continuous biomarkers to be dichotomized, which in turns requires the selection of a cut-point at which to dichotomize. In this article, we review the statistical principles underlying...
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