نتایج جستجو برای: free β

تعداد نتایج: 684769  

Journal: :Computational Statistics & Data Analysis 2010
Xuerong Meggie Wen

The requirement of constant censoring parameter β in Koziol–Green (KG) model is too restrictive. When covariates are present, the conditional KG model (Veraverbekea and Cadarso-Suárez, 2000) which allows β to be dependent on the covariates is more realistic. In this paper, using sufficient dimension reduction methods, we provide a model-free diagnostic tool to test if β is a function of the cov...

Journal: :CoRR 2010
Arseny M. Shur

We present upper and two-sided bounds of the exponential growth rate for a wide range of power-free languages. All bounds are obtained with the use of algorithms previously developed by the author. This is not a research paper but rather an appendix to several research papers by the author, see [1–5]. We put together the best currently known numerical bounds on the growth rate of power-free lan...

2012
Wuhong Li Changhai Liu Guangguo Tan Xinrong Zhang Zhenyu Zhu Yifeng Chai

Chiral separations of five β-adrenergic antagonists (propranolol, esmolol, atenolol, metoprolol, and bisoprolol) were studied by capillary electrophoresis using six cyclodextrins (CDs) as the chiral selectors. Carboxymethylated-β-cyclodextrin (CM-β-CD) exhibited a higher enantioselectivity power compared to the other tested CDs. The influences of the concentration of CM-β-CD, buffer pH, buffer ...

Journal: :Clinical cancer research : an official journal of the American Association for Cancer Research 2014
Julius Chapiro Surojit Sur Lynn Jeanette Savic Shanmugasundaram Ganapathy-Kanniappan Juvenal Reyes Rafael Duran Sivarajan Chettiar Thiruganasambandam Cassandra Rae Moats MingDe Lin Weibo Luo Phuoc T Tran Joseph M Herman Gregg L Semenza Andrew J Ewald Bert Vogelstein Jean-François Geschwind

PURPOSE This study characterized the therapeutic efficacy of a systemically administered formulation of 3-bromopyruvate (3-BrPA), microencapsulated in a complex with β-cyclodextrin (β-CD), using an orthotopic xenograft mouse model of pancreatic ductal adenocarcinoma (PDAC). EXPERIMENTAL DESIGN The presence of the β-CD-3-BrPA complex was confirmed using nuclear magnetic resonance spectroscopy....

Journal: :Annals of Clinical Biochemistry: International Journal of Laboratory Medicine 1993

2013
RICHARD ARRATIA THOMAS M. LIGGETT MALCOLM J. WILLIAMSON

In discrete contexts such as the degree distribution for a graph, scale-free has traditionally been defined to be power-law. We propose a reasonable interpretation of scale-free, namely, invariance under the transformation of p-thinning, followed by conditioning on being positive. For each β ∈ (1, 2), we show that there is a unique distribution which is a fixed point of this transformation; the...

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