نتایج جستجو برای: stable units
تعداد نتایج: 426243 فیلتر نتایج به سال:
Consider the Hopfield network [3], a “neural network,” with symmetrical connections between binary neural “units.” Hopfield showed how such a network could learn: patterns were “imposed” on the network, and connections modified by local Hebbian learning. Remarkably, the network could “fill in” patterns from fragments, providing a form of “content-addressable memory.” Hopfield showed, too, that ...
Wheat and barley DNA enriched for ribosomal RNA genes was isolated from actinomycin D-CsCl gradients and used to clone the ribosomal repeating units in the plasmid pAC184. All five chimeric plasmids isolated which contained wheat rDNA and eleven of the thirteen which had barley rDNA were stable and included full length ribosomal repeating units. Physical maps of all length variants cloned have ...
A method is developed for evaluating the total energy of polypeptides based on a combination of quantum mechanical and empirical potentials. Adjacent and nonadjacent peptide units are allowed to interact through these respective means. Our hybrid procedure is applied to a study of polyglycine and compared to the results obtained by the method of Scheraga and coworkers. We find the alpha helical...
BACKGROUND Pulmonary embolism is associated with high mortality in patients with hypotension or circulatory shock. However, the association between some clinical variables and mortality is still unclear in hemodynamically stable patients. OBJECTIVES To derive an in-hospital mortality risk stratification model in hemodynamically stable patients with pulmonary embolism. METHODS This is a pros...
A recombinant vaccinia virus encoding human prostate-specific antigen (rV-PSA) was administered as three consecutive monthly doses to 33 men with rising PSA levels after radical prostatectomy, radiation therapy, both, or metastatic disease at presentation. Dose levels were 2.65 x 10(6), 2.65 x 10(7), and 2.65 x 10(8) plaque forming units. Ten patients who received the highest dose also received...
یکی از مسائل مهمی که در مهندسی ژئوتکنیک به آن پرداخته می شود، مسئله مربوط به بررسی پایداری شیبهای طبیعی و ساخته شده می باشد. روشهای مختلفی برای بررسی پایداری شیبها موجود بوده که از مهمترین آنها می توان روشهای تعادل حدی و روشهای عددی را نام برد. یکی از روشهای دیگری که می توان از آن در بررسی پایداری شیبها بهره گرفت ، کاربرد روشهای مختلف هوش مصنوعی است . در این تحقیق از یک مدل شبکه عصبی مصنوعی به ...
In this paper, we shed light on the dynamic characteristics of rational group behaviors and the relationship between monetary policy and economic units in the financial market by using an agent-based model (ABM), the Hurst exponent, and the Shannon entropy. First, an agent-based model is used to analyze the characteristics of the group behaviors at different levels of irrationality. Second, the...
study confirms the conclusion of Braga et al. (2 ) that the individuality in Hb A1c is limiting the use of outcome-based or populationbased reference limits for test interpretation and will therefore also limit the use of a fixed cutoff value of 48 mmol/mol (6.5% DCCT) for the diagnosis of diabetes for all individuals/patients. The reason for this is that a small change in Hb A1c may indicate a...
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