نتایج جستجو برای: branching point
تعداد نتایج: 550216 فیلتر نتایج به سال:
We compute the branching ratio of inclusive B → ηXs decay based upon the QCD anomaly mechanism: b → s + g → s + g + η. To obtain a reliable B → ηXs branching ratio, we calculate the b → s+ g form factors up to the next-to-leadinglogarithmic(NLL) approximation. We point out that the Standard Model prediction for B → ηXs is consistent with the CLEO data, in contrast to the claims of some previous...
Evolutionary branching points are a paradigmatic feature of adaptive dynamics, because they are potential starting points for adaptive diversification. The antithesis to evolutionary branching points are continuously stable strategies (CSS's), which are convergent stable and evolutionarily stable equilibrium points of the adaptive dynamics and hence are thought to represent endpoints of adaptiv...
It is now well-established that intrinsic fluctuations in human behavior tend to exhibit long-range correlations in the form of 1/f scaling. Their meaning is an ongoing matter of debate, and some researchers argue they reflect the tendency for neural and bodily systems to poise themselves near critical states. A spiking neural network model is presented that self-tunes to a critical point in te...
Modeling of the Branching Point Distribution During the Polymerization of <i>N</i> ?Vinylpyrrolidone
To gain insights into the microstructure of polyvinylpyrrolidone (PVP), a detailed reaction mechanism is developed, which characterizes polymer along property coordinate chain length, terminal double bonds (TDB), and branching points. For practical purposes, calculations with three coordinates are unfeasible, model reduction needed. Here, reduced only one single without significant loss accurac...
We consider a new model of branching random walk on multidimensional lattice with continuous time and one source particle reproduction death, as well an infinite number sources in which, addition to the walk, only absorption particles can occur. The asymptotic behavior integer moments both total at point is studied depending relationship between parameters. In case existence isolated positive e...
We call a point process Z on R exp-1-stable if for every α, β ∈ R with e + e = 1, Z is equal in law to TαZ + TβZ , where Z ′ is an independent copy of Z and Tx is the translation by x. Such processes appear in the study of the extremal particles of branching Brownian motion and branching random walk and several authors have proven in that setting the existence of a point process D on R such tha...
Abstract — This paper presents a new structural feature for feature-based retinal image registration. The conventional point-matching methods largely depend on the branching angles of single bifurcation point. The feature correspondence across two images may not be unique due to the similar angle values. In view of this, structure-matching registration is favored. The bifurcation structure is c...
We show in this paper how simulations of ODEs and continuations of systems of algebraic equations can be combined to study the evolution of biodiversity in multi-species systems where phenotypic traits are genetically transmitted. We follow the Adaptive Dynamics (AD) approach, that provides a deterministic approximation of the evolutionary dynamics of stationary coexisting populations in terms ...
The superficial temporal artery, one of the terminal branches of the external carotid artery, is used for temporoparietal, parieto-occipital flaps and forehead flaps in reconstructive surgery. The topographic anatomy of this artery exhibits ethnic variations. Therefore, this study aimed to determine the branching pattern of the superficial temporal artery and its relation to specified landmarks...
We consider a continuous-time symmetric branching random walk on multidimensional lattice with finite set of particle generation centers, i.e., sources. The existence positive eigenvalue the evolutionary operator means exponential growth first moment total number particles both at an arbitrary point and entire lattice. Branching walks or negative intensities sources that have simplex configurat...
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