نتایج جستجو برای: branching index

تعداد نتایج: 423188  

Journal: :Nature Reviews Cancer 2007

Production of Mrenda (Corchorus olitorius) in Kenya has been low due to various reasons, such as poor agronomic practices like incorrect fertilizer rates. Observations from the Mrenda growing areas showed that there is high unmet demand for crop in local market and even for export. This is due to yields being low, 2-4 tons/ha as compared to expected yield of 5-8 tons/ha. Therefore, the main obj...

1999
Yishay Mansour David A. McAllester

It is known that decision tree learning can be viewed as a form of boosting. However, existing boosting theorems for decision tree learning allow only binary-branching trees and the generalization to multi-branching trees is not immediate. Practical decision tree algorithms, such as CART and C4.5, implement a trade-off between the number of branches and the improvement in tree quality as measur...

2004
M. Sismilich J. Van Pelt

To classify and statistically compare architecture data from biand trifurcating tree-like structures across different sizes the Tree Symmetry Index as the mean of an asymmetry measure at all the branching points in the centrifugal hierarchy as developed by Van Pelt et al. (1992) and Van Pelt (1997) or the branching points mean in centrifugal hierarchy developed by Sismilich (2001) and Sismilich...

Journal: :Annals of Botany 1909

2010
Tom Chou

Consider a particle that can replicate itself instantaneously at random times. In general there is a distribution of times from which the particle draws in order to initiate replication. For simplicity, we assume a Poisson process, and a replication rate of λ. Consider the total integer number of particles N(t) at any time t. Let us now consider one realization of the continuous-time branching ...

2010
CHUNHUA MA

The conditional least-squares estimators of the variances are studied for a critical branching process with immigration that allows the offspring distributions to have infinite fourth moments. We derive different forms of limiting distributions for these estimators when the offspring distributions have regularly varying tails with index α. In particular, in the case in which 2 < α < 3 , the nor...

Journal: :Physical review. D, Particles and fields 1996
Kamal Santra Uppal Verma

With the inclusion of nonfactorized amplitudes in a scheme with Nc = 3, we have studied Cabibbo-favored decays of D0 and D+ into two-body hadronic states involving two isospins in the final state. We have shown that it is possible to understand the measured branching ratios and determined the sizes and signs of nonfactorized amplitudes required. PACS index: 13.25 Hw, 14.40. Nd on leave of absen...

بهلولی, ابوالفضل, ثاقب, سوده, جواد رشید, رضا, زمردی, افشار, طرزمنی, محمدکاظم,

Background: In kidney transplantation decision about the proper kidney donation is different between surgeons, but simple vasculature anatomy and a kidney without abnormalities are the most important reasons of choosing a kidney. Therefore    complete assessment of renal vessels of a live donor with noninvasive techniques is a necessity for nephrectomy. For delineation of the kidney vasculature...

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