Toboggan or Not Toboggan
نویسندگان
چکیده
منابع مشابه
Toboggan-Based Intelligent Scissors with a Four-Parameter Edge Model
Intelligent Scissors is an interactive image segmentation tool that allows a user to select piece-wise globally optimal contour segments that correspond to a desired object boundary. We present a new and faster method of computing the optimal path by over-segmenting the image using toboggan-ing and then imposing a weighted planar graph on top of the resulting region boundaries. The resulting re...
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Pulmonary embolism (PE), a potentially life-threatening condition, is a result of underlying venous thromboembolic disease. An early and accurate diagnosis is the key to survival. Computed tomography angiography (CTA) has merged as an accurate diagnostic tool for PE. However, there are hundreds of CT slices in each CTA study. Manual reading is laborious, time consuming and complicated by variou...
متن کاملSpiked harmonic quantum toboggans
Quantum particle is assumed located in an analytically perturbed harmonic-oscillator potential. Its motion along certain complex, PT −symmetric “toboggan” paths which N−times encircle the branch point in the origin is studied in both the boundstate and scattering regime.
متن کاملQuantum toboggans
Among all the PT −symmetric potentials defined on complex coordinate contours C(s), the name “quantum toboggan” is reserved for those whose C(s) winds around a singularity and lives on at least two different Riemann sheets. An enriched menu of prospective phenomenological models is then obtainable via the mere changes of variables. We pay thorough attention to the harmonic oscillator example wi...
متن کاملTwo-step identification of observables in PT −symmetric quantum-toboggan models
Many quantum systems with real energies generated by an apparently nonHermitian Hamiltonian H 6= H may re-acquire the consistent probabilistic interpretation via an ad hoc metric Θ = Θ(H) 6= I which specifies also the set of all the observables in their updated Hilbert space of states. This recipe seemed to fail for the so called “quantum toboggans”. We describe the remedy – firstly we suggest ...
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عنوان ژورنال:
دوره 102 شماره
صفحات -
تاریخ انتشار 1987