نتایج جستجو برای: t ai β polli

تعداد نتایج: 903698  

Journal: :Math. Comput. 1996
Paul Erdös Mordechai Lewin

An infinite sequence a1 < a2 < · · · is d-complete if every sufficiently large integer is the sum of ai such that no one divides the other. We investigate d-completeness of sets of the form {pαqβ} and {pαqβrγ} with α, β, γ nonnegative.

2011
Takatoku Oida Howard L. Weiner

BACKGROUND It is generally assumed that T cells do not produce active TGF-β since active TGF-β as measured in supernatants by ELISA without acidification is usually not detectable. However, it is possible that active TGF-β from T cells may take a special form which is not detectable by ELISA. METHODOLOGY/PRINCIPAL FINDINGS We constructed a TGF-β bioassay which can detect both soluble and memb...

2010
Fuyi Xu

Let T be a time scale. In this paper, we study the existence of multiple positive solutions for the following nonlinear singular m-point boundary value problem dynamic equations with sign changing coefficients on time scales    u(t) + a(t)f(u(t)) = 0, (0, T )T, u(0) = ∑m−2 i=1 aiu (ξi), u(T ) = ∑ k i=1 biu(ξi)− ∑ s i=k+1 biu(ξi)− ∑ m−2 i=s+1 biu (ξi), where 1 ≤ k ≤ s ≤ m − 2, ai, bi ∈ (0,+...

Journal: :Artif. Intell. 2013
Eduard H. Hovy Roberto Navigli Simone Paolo Ponzetto

a r t i c l e i n f o a b s t r a c t Recent years have seen a great deal of work that exploits collaborative, semi-structured content for Artificial Intelligence (AI) and Natural Language Processing (NLP). This special issue of the Artificial Intelligence Journal presents a variety of state-of-the-art contributions, each of which illustrates the substantial impact that work on leveraging semi-...

2011
Da-Xue Chen Guang-Hui Liu

Received: November 24, 2010 Accepted: December 10, 2010 doi:10.5539/jmr.v3n2p193 This work was supported by the Science and Technology Program of Hunan Province of P. R. China (Grant No. 2010FJ6021). Abstract We investigate the bounded oscillation of the second-order nonlinear neutral delay dynamic equation with oscillating coefficients ( r(t) ∣∣∣∣[x(t) + p(t)x(τ(t))]Δ∣∣∣∣α−1[x(t) + p(t)x(τ(t))...

1998
Angel P. Del Pobil

Abst rac t . The role of perception and action in current AI systems is analyzed and some points concerning present AI methodologies are discussed. It is argued that if we accept as a central goal for AI to build artificial systems that behave in an intelligent way in the real world, then additional evaluation criteria for intelligent systems should be used. Finally, some of these criteria are ...

2000
Marcus Hutter

Decision theory formally solves the problem of rational agents in uncertain worlds if the true environmental probability distribution is known. Solomonoo's theory of universal induction formally solves the problem of sequence prediction for unknown distribution. We unify both theories and give strong arguments that the resulting universal AI model behaves optimal in any computable environment. ...

Journal: :Annals of oncology : official journal of the European Society for Medical Oncology 2008
P Hadji J-J Body M S Aapro A Brufsky R E Coleman T Guise A Lipton M Tubiana-Hulin

BACKGROUND Recent studies indicate that women with breast cancer are at increased risk of fracture compared with their age-matched peers. Current treatment guidelines are inadequate for averting fractures in osteopenic women, especially those receiving aromatase inhibitor (AI) therapy. Therefore, we sought to identify clinically relevant risk factors for fracture that can be used to assess over...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2008
Liqin Ban Jack Zhang Limei Wang Willem Kuhtreiber Douglas Burger Denise L Faustman

Human autoimmune (AI) diseases are difficult to treat, because immunosuppressive drugs are nonspecific, produce high levels of adverse effects, and are not based on mechanistic understanding of disease. Destroying the rare autoreactive T lymphocytes causing AI diseases would improve treatment. In animal models, TNF selectively kills autoreactive T cells, thereby hampering disease onset or progr...

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