نتایج جستجو برای: 4872 bw075 em

تعداد نتایج: 305982  

2007
Mingfeng Wang Masahiro Kuroda Michio Sakakihara Zhi Geng

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...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده ریاضی 1393

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.

Journal: :Pain physician 2015
Xiao-Hui Zhao Ya-Qun Zhao Chao Zhu Lei Chen Wei Hu Ting Zhang Yu-Lin Dong Sheng-Xi Wu Alan David Kaye Wen Wang Yun-Qing Li

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...

2015
Tao Liu Yonghui Zhang Hualiang Lin Xiaojuan Lv Jianpeng Xiao Weilin Zeng Yuzhou Gu Shannon Rutherford Shilu Tong Wenjun Ma

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...

2013
Carol L Hodgson Sue Berney Megan Harrold Manoj Saxena Rinaldo Bellomo

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 ...

Journal: :The Journal of pharmacology and experimental therapeutics 2005
Maia Terashvili Hsiang-En Wu Randy J Leitermann Han-Sen Sun Andrew D Clithero Leon F Tseng

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...

Journal: :CJEM 2011
Morgan Hillier Shelley McLeod Danny Mendelsohn Bradley Moffat Audra Smallfield Akram Arab Ashley Brown Robert Sedran

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...

2010
André C. Hora Clodoveu A. Davis Mirella M. Moro

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...

2013
Camila de A. Melo Lilian K. de Oliveira Danielle Goveia André H. Rosa

O objetivo deste trabalho foi avaliar os processos de adsorção e dessorção de micronutrientes em amostras de turfas tropicais visando uma possível aplicação em solos. Para isso, experimentos de adsorção foram estudados em diferentes valores de pH e a partir de solução metálica multielementar e elementar. As capacidades de adsorção máximas ocorreram em pH 6,0 e a ordem de afinidade observada em ...

2004
Patricia A. Carneiro Nivaldo Boralle Nelson R. Stradiotto Maysa Furlan Maria Valnice B. Zanoni

A remoção do corante reativo Reactive Blue 4 (RB4) por redução eletroquímica em solução aquosa foi investigada sobre eletrodo de carbono vítreo reticulado. O grupo antraquinona presente no corante RB4 é reduzido em pH < 8,0 em uma única etapa a hidroquinona, segundo um processo reversível de dois elétrons e reação de pré-protonação, via geração de um radical semiquinona detectado espectrotométr...

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