نتایج جستجو برای: point estimate method pem
تعداد نتایج: 2213083 فیلتر نتایج به سال:
One of the main challenges faced in design and construction phases of tunneling projects is the determination of maximum allowable advance step to maximize excavation rate and reduce project delivery time. Considering the complexity of determining this factor and unexpected risks associated with inappropriate determination of that, it is necessary to employ a method which is capable of accounti...
In this paper, the problem of proportional covariance matrices estimation for random Gaussian complex vectors is investigated. The maximum likelihood estimates of the matrix and the scale factors are derived, and their statistical performances are studied, through bias, consistency and asymptotic distribution. It is also shown that the problem treated here generalizes the covariance estimation ...
We measured inhalable, thoracic, and so-called ``total'' wood dust exposure in British Columbia lumber mill workers. Particle-size selective sampling was conducted using the GSP and Seven hole inhalable samplers, the PEM thoracic sampler and the 37-mm closed-face cassette ``total'' sampler. All measurements were full-shift personal samples, obtained from randomly selected workers. We obtained i...
This paper examines the prevailing cultural practices that lead to poor infant growth and poor maternal and lactating mothers’ nutritional status in sub-Saharan African region (SSAR). The paper reveals that SSAR has the highest maternal, infant and under five mortality rates and protein energy malnutrition (PEM). None of the countries in this region has made any remarkable improvement in reduci...
We aimed to elucidate the incidence of protein–energy malnutrition (PEM) in patients with chronic liver disease and to identify factors linked to the presence of PEM. A total of 432 patients with chronic liver disease were analyzed in the current analysis. We defined patients with serum albumin level of 3.5 g/dL and nonprotein respiratory quotient (npRQ) value using indirect calorimetry less th...
INTRODUCTION PRONOUNCE compared the efficacy and safety of pemetrexed+carboplatin followed by pemetrexed (Pem+Cb) with paclitaxel+carboplatin+bevacizumab followed by bevacizumab (Pac+Cb+Bev) in patients with advanced nonsquamous non-small-cell lung cancer (NSCLC). METHODS Patients ≥18 years of age with stage IV nonsquamous NSCLC (American Joint Committee on Cancer v7.0), and Eastern Cooperati...
In this paper a 300W PEM FC Stack dynamic model is developed and implemented in MATLAB/Simulink. Using semi-empirical equations for modelling a Proton Exchange Membrane (PEM) fuel cell is proposed for providing a tool for the design and analysis of fuel cell stack systems. The modelling results are compared with experimental results. The comparison shows good agreements between the modelling re...
Objective(s): To investigate the diagnostic accuracy of positron emission mammography (PEM) and positron emission tomography/computed tomography (PET/CT) for small breast tumors of less than 20 mm in size.Methods: The study was conducted on a total of 100 subjects (i.e., 50 patients with pathologically proven breast cancer and 50 normal cases of medical screening). The total number of tumors wa...
for the polynomial planar vector fields with a hyperbolic or nilpotent critical point at the origin, the monodromy problem has been solved, but for the strongly degenerate critical points this problem is still open. when the critical point is monodromic, the stability problem or the center- focus problem is an open problem too. in this paper we will consider the polynomial planar vector fields ...
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