نتایج جستجو برای: masses model
تعداد نتایج: 2142622 فیلتر نتایج به سال:
over the past decades a number of approaches have been applied for forecasting mortality. in 1992, a new method for long-run forecast of the level and age pattern of mortality was published by lee and carter. this method was welcomed by many authors so it was extended through a wider class of generalized, parametric and nonlinear model. this model represents one of the most influential recent d...
Various structural discontinuities, which form a discrete fracture network, play a significant role in the failure conditions and stability of the rock masses around underground excavations. Several continuum numerical methods have been used to study the stability of underground excavations in jointed rock masses but only few of them can take into account the influence of the pre-existing natur...
Zee model leads naturally to two heavy, strongly degenerate and almost maximally mixed neutrinos and to one light neutrino with small mixing. This pattern coincides with the one needed for a solution of the atmospheric neutrino problem by νμ → ντ oscillations and for existence of the two component hot dark matter in the Universe. Furthermore, the oscillations νμ → νe can be in the range of sens...
Background: Mediastinum includes the vital organs like the heart the major respiratory passages and the major vessels due to this vicinity, the masses of this area with malignant or benign etiology or cause systemic diseases such as metastatic malignancies or granulomatous reactions can be potentially fatal. Materials and Methods: According to the priority of the problem, a ten years comprehens...
A composite model of fermions is used to estimate neutrino masses. The formula for masses in the model is approximate and neglects the small masses of the electrically neutral systems (neutrino). However, in this model the electron-neutrino forms part of the structures of the weak gauge bosons (Wand Z) and, if the masses of these particles are calculated formally using the zero neutrino mass, t...
Allochthonous masses are common structures in Zagros fold-thrust belt. They are generally considered as collapse structures formed by the influence of gravity and in rock units with competency contrast. However, large allochthonous masses mapped in Dowgonbadan area in Dezful Embayment near the Mountain Front Fault (MFF) of Zagros show characteristics different from the belt common collapse stru...
Abdominal mass is one of the commonest clinical findings in children. The purpose of this study was to evaluate abdominal masses in different age groups in a referral children surgical center. We retrospectively reviewed records of 325 patients (57% boys, mean age 37.7 months) admitted to Amir Kabir hospital in period of 12 years for abdominal mass surgery. The 4 most common abdominal masses wa...
static deformation modulus is recognized as one of the most important parameters governing the behavior of rock masses. predictive models for the mechanical properties of rock masses have been used in rock engineering because direct measurement of the properties is difficult due to time and cost constraints. in this method the deformation modulus is estimated indirectly from classification syst...
16 AUGUST 2013 VOL 341 SCIENCE www.sciencemag.org 2. A. P. Patterson, L. A. Tabak, A. S. Fauci, F. S. Collins, S. Howard, Science 339, 1036 (2013). 3. A Framework for Guiding U.S. Department of Health and Human Services Funding Decisions about Research Proposals with the Potential for Generating Highly Pathogenic Avian Infl uenza H5N1 Viruses that are Transmissible among Mammals by Respiratory ...
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