نتایج جستجو برای: t ai β polli
تعداد نتایج: 903698 فیلتر نتایج به سال:
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.
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...
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,+...
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-...
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))...
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 ...
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. ...
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...
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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