نتایج جستجو برای: آلگوریتم em
تعداد نتایج: 306029 فیلتر نتایج به سال:
By means of the generalized Galilei covariant EM field equations, the EM potentials and EM fields of a charged particle moving with an arbitrary nonuniform velocity v(t) in an inertial frame with substratum flow w are calculated. It is shown that the dynamic EM fields are excitations of the EM ether caused by the motion v(t) — w of the charge relative to the wave carrier with velocity w. Qualit...
1 Programa de Pós-Graduação em Saúde Coletiva, Faculdade de Medicina, Universidade Federal de Juiz de Fora, UFJF; Núcleo Interdisciplinar de Estudos do Desenvolvimento Infantil NIEDI, Faculdade de Fisioterapia, UFJF; 3Núcleo de Assessoria, Treinamento e Estudos em Saúde NATES, UFJF, Juiz de Fora, MG, Brasil. 2 Mestre em Saúde Coletiva (UFJF), Departamento de. Saúde Coletiva Faculdade de Medicin...
The Expectation-Maximization (EM) algorithm is a very general and popular iterative computational algorithm to find maximum likelihood estimates from incomplete data and broadly used to statistical analysis with missing data, because of its stability, flexibility and simplicity. However, it is often criticized that the convergence of the EM algorithm is slow. The various algorithms to accelerat...
یکی از روش های برآورد پارامترها بعد از مشاهده، روش ماکسیمم درستنمایی است. اگر بردار مشاهدات غیرکامل باشد. یعنی، برخی از داده ها به دلیل سانسور شدن یا مقاذیر گمشده در دسترس نباشند، می توان از روش های تکرارشونده همچون روش نیوتن-رافسون و الگوریتم امید ریاضی بیشینه سازی یا به اختصار الگوریتم em برای برآورد پارامترها استفاده کرد.
Hormone replacement remains one of the common therapies for menopause-related pain but is associated with risk of orofacial or back pain. Spinal endomorphin-2 (EM-2) is involved in varied pain and its release is steroid-dependent, but whether increasing spinal EM-2 can inhibit thermal hyperalgesia and inflammatory pain in ovariectomized (OVX) female rats, an animal model mimicking menopause, is...
Although erythromelalgia (EM) has been documented in the literature for almost 150 years, it is still poorly understood. To overcome this limitation, we examined the spatial distribution of epidemic EM, and explored the association between temperature fluctuation and epidemic EM outbreaks in China. We searched all peer-reviewed literature on primary epidemic EM outbreaks in China. A two-stage m...
Early mobilization (EM) of ICU patients is a physiologically logical intervention to attenuate critical illness-associated muscle weakness. However, its long-term value remains controversial. We performed a detailed analytical review of the literature using multiple relevant key terms in order to provide a comprehensive assessment of current knowledge on EM in critically ill patients. We found ...
The effects of pretreatment with endomorphin-1 (EM-1) and endomorphin-2 (EM-2) given into the ventral periaqueductal gray (vPAG) to induce antianalgesia against the tail-flick (TF) inhibition produced by morphine given into the vPAG were studied in rats. Pretreatment with EM-1 (3.5-28 nmol) given into vPAG for 45 min dose-dependently attenuated the TF inhibition produced by morphine (9 nmol) gi...
OBJECTIVES The objective of this study was to assess medical students' knowledge of and attitudes toward the two Canadian emergency medicine (EM) residency programs (Fellow of the Royal College of Physicians of Canada [FRCPC] and Certificant of the College of Family Physicians-Emergency Medicine [CCFP-EM]). Additionally, medical students interested in EM were asked to select factors affecting t...
Resumo. Dados representados em documentos GML são utilizados em diversas aplicações GIS e na Web visando principalmente o armazenamento, a manipulação e a troca de informações geográficas. Entretanto, uma grande parte das informações geográficas estão armazenadas em bancos de dados espaciais. Este trabalho apresenta uma metodologia para mapear dados geográficos, estruturados usando relacionamen...
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