1,528 research outputs found
Generic Structure of Research Article Abstracts
As an academic genre, the research article (RA) abstracts play an important role in academic community. This paper aims to explore the differences between RA abstracts by native and non-native speakers of English in terms of the generic structure. Theoretically, the commonly accepted IMRD model (Introduction-Method-Results-Discussion) and Swale’s Move-Step model are adopted to analyse the macro- and micro-structure respectively. It is found that the Introduction Move is obligatory for English RA abstracts by non-native speakers as opposed to the Introduction and the Results move by native speakers. Key words: Research Article; ; GeGenre Analysisneric Structur
Quantum Robot: Structure, Algorithms and Applications
A kind of brand-new robot, quantum robot, is proposed through fusing quantum
theory with robot technology. Quantum robot is essentially a complex quantum
system and it is generally composed of three fundamental parts: MQCU (multi
quantum computing units), quantum controller/actuator, and information
acquisition units. Corresponding to the system structure, several learning
control algorithms including quantum searching algorithm and quantum
reinforcement learning are presented for quantum robot. The theoretic results
show that quantum robot can reduce the complexity of O(N^2) in traditional
robot to O(N^(3/2)) using quantum searching algorithm, and the simulation
results demonstrate that quantum robot is also superior to traditional robot in
efficient learning by novel quantum reinforcement learning algorithm.
Considering the advantages of quantum robot, its some potential important
applications are also analyzed and prospected.Comment: 19 pages, 4 figures, 2 table
Orbital density wave induced by electron-lattice coupling in orthorhombic iron pnictides
In this paper we explore the magnetic and orbital properties closely related
to a tetragonal-orthorhombic structural phase transition in iron pnictides
based on both two- and five-orbital Hubbard models. The electron-lattice
coupling, which interplays with electronic interaction, is self-consistently
treated. Our results reveal that the orbital polarization stabilizes the spin
density wave (SDW) order in both tetragonal and orthorhombic phases. However,
the ferro-orbital density wave (F-ODW) only occurs in the orthorhombic phase
rather than in the tetragonal one. Magnetic moments of Fe are small in the
intermediate Coulomb interaction region for the striped antiferromangnetic
phase in the realistic five orbital model. The anisotropic Fermi surface in the
SDW/ODW orthorhombic phase is well in agreement with the recent angle-resolved
photoemission spectroscopy experiments. These results suggest a scenario that
the magnetic phase transition is driven by the ODW order mainly arising from
the electron-lattice coupling.Comment: 21 pages, 10 figure
The visualization of the space probability distribution for a particle moving in a double ring-shaped Coulomb potential
The analytical solutions to a double ring-shaped Coulomb potential (RSCP) are
presented. The visualizations of the space probability distribution (SPD) are
illustrated for the two-(contour) and three-dimensional (isosurface) cases. The
quantum numbers (n, l, m) are mainly relevant for those quasi quantum numbers
(n' ,l' ,m' ) via the double RSCP parameter c. The SPDs are of circular ring
shape in spherical coordinates. The properties for the relative probability
values (RPVs) P are also discussed. For example, when we consider the special
case (n, l, m)=(6, 5, 0), the SPD moves towards two poles of axis z when the P
increases. Finally, we discuss the different cases for the potential parameter
b which is taken as negative and positive values for c>0 . Compared with the
particular case b=0 , the SPDs are shrunk for b=-0.5 while spread out for
b=0.5.Comment: 26 pages, 5 tables and 3 figures, Advances in High Energy Physics, in
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The visualization of the space probability distribution for a moving particle I: in a single ring-shaped Coulomb potential
We first present the exact solutions of the single ring-shaped Coulomb
potential and then realize the visualizations of the space probability
distribution for a moving particle within the framework of this potential. We
illustrate the two-(contour) and three-dimensional (isosurface) visualizations
for those specifically given quantum numbers (n, l, m) essentially related to
those so-called quasi quantum numbers (n',l',m') through changing the single
ring-shaped Coulomb potential parameter b. We find that the space probability
distributions (isosurface) of a moving particle for the special case and the
usual case are spherical and circular ring-shaped, respectively by considering
all variables in spherical coordinates. We also study the features of the
relative probability values P of the space probability distributions. As an
illustration, by studying the special case of the quantum numbers (n, l, m)=(6,
5, 1) we notice that the space probability distribution for a moving particle
will move towards two poles of axis z as the relative probability value P
increases. Moreover, we discuss the series expansion of the deformed spherical
harmonics through the orthogonal and complete spherical harmonics and find that
the principal component decreases gradually and other components will increase
as the potential parameter b increases.Comment: 28 pages, 6 tables, 1 figure
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