نتایج جستجو برای: dot in circle sign
تعداد نتایج: 16995911 فیلتر نتایج به سال:
In this paper, a novel shape descriptor for shape-based object retrieval is proposed. A growing process is introduced in which a contour is reconstructed from the bounding circle of the shape. In this growing process, circle points move toward the shape in normal direction until they get to the shape contour. Three different shape descriptors are extracted from this process: the first descript...
Received: Revised: Accepted: August 04, 2011 August 16, 2011 August 26, 2011
In this research, the effect of the uniform electric field on the ground-state of a centered hydrogenic donor impurity in a GaAs/AlAs spherical quantum dot was studied using infinite potential model. In presence of strong electric field, due to the stark effect (perturbing electric field), the ground state energy would increase linearly. In presence of weak electric fields, the normalized bind...
The 5th anniversary of the Fukushima disaster and the 30th anniversary of the Chernobyl disaster, the two most catastrophic nuclear accidents in history, both occurred recently. Images of Chernobyl are replete with the international sign of radioactive contamination (a circle with three broad spokes radiating outward in a yellow sign). In contrast, ongoing decontamination efforts at Fukushima l...
We investigate the appearance of π lapses in the transmission phase θ of a two-level quantum dot with Coulomb interaction U . Using the numerical and functional renormalization group methods we study the entire parameter space for spin-polarized as well as spin-degenerate dots, modeled by spinless or spinful electrons, respectively. We investigate the effect of finite temperatures T . For small...
In this paper, a novel method is proposed for the Traffic Sign Recognition (TSR) using the Principle Component Analysis (PCA) and the Multi-Layer Perceptron (MLPs) network. In particular to the proposed morphological classification method, the candidate signs are individually detected from two chrome components of the YCbCr space and then classified into three shape classes: circle, square, and...
Background and Aim: Trichoscopy is a non-invasive diagnostic tool for hair diseases. The aim of this study was to evaluate the trichoscopic findings in different types of alopecia. Methods: This cross-sectional study was conducted on 155 alopecia patients referring to Hamadan’s Sina hospital from March 2019 to July 2020. The patients were recruited after giving written informed consent. Sca...
The ground state energies of two interacting electrons confined in a coupled double quantum dot (DQD) presented in a magnetic field has been calculated by solving the relative Hamiltonian using variational and exact diagonalization methods. The singlet-triplet transitions in the angular momentum and spin of the quantum dot ground state had been shown .We have studied the magnetic field versus c...
The ground state energies of two interacting electrons confined in a coupled double quantum dot (DQD) presented in a magnetic field has been calculated by solving the relative Hamiltonian using variational and exact diagonalization methods. The singlet-triplet transitions in the angular momentum and spin of the quantum dot ground state had been shown .We have studied the magnetic field versus c...
The spatial interval containing some visual elements (fillers) seems to be longer than an empty of the same length, and effect persists for most observers. This illusion interrupted extent (or filled-space illusion) can observed even in extremely simplified line drawings, but its origin is still not completely understood. Recently, we proposed a quantitative explanation results experiments with...
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