This article dwells upon research concerning human language processing techniques, namely emotion analysis, conducted to identify emotions of author quotations in English newspaper articles. The publication describes ...
详细信息
ISBN:
(纸本)9798350334326
This article dwells upon research concerning human language processing techniques, namely emotion analysis, conducted to identify emotions of author quotations in English newspaper articles. The publication describes general information about human language processing, brief description of analogues based on machine learning and neural network to analyse emotions in text. The main goal is to develop intelligent system for sentiment analysis of English language quotations and keywords identification that influences public opinion. The article describes sequence of program actions and tools that have been used. Then, statistics of tasks performed by neural networks with various functions of activators have been described. In the publication, product demo version has been described, and primary usage scenario has been depicted. In the end, research results have been summarised.
To handle high volume numerical data from simulations, a data reduction and compression scheme based on discrete wavelet transform was presented. By discrete wavelet transform, most energy of scientific data is concen...
详细信息
To handle high volume numerical data from simulations, a data reduction and compression scheme based on discrete wavelet transform was presented. By discrete wavelet transform, most energy of scientific data is concentrated into a smaller region. Wavelet coefficients can be selected by thresholded and still retain high percentage of energy of the original data. To optimize the threshold, objection function is constructed to balance model accuracy and data reduction. Reduced coefficients are then quantized and finally entropy encoded. Signal noise ratio and relative energy error are used to evaluate precision loss of data in the whole process. To show applicability of scheme, results obtained with plasma simulation data is presented. Extension of the work leads to efficient analysis and understanding of the GB or TB volume scientific data.
In order to search for the magnetic ground state of surface nanostructures we extended first principles adiabatic spin dynamics to the case of fully relativistic electron scattering. Our method relies on a constrained...
In order to search for the magnetic ground state of surface nanostructures we extended first principles adiabatic spin dynamics to the case of fully relativistic electron scattering. Our method relies on a constrained density functional theory whereby the evolution of the orientations of the spin-moments results from a semi-classical Landau-Lifshitz equation. This approach is applied to a study of the ground state of a finite Co chain placed along a step edge of a Pt(111) surface. As far as the ground state spin orientation is concerned we obtain excellent agreement with the experiment. Furthermore we observe noncollinearity of the atom-resolved spin and orbital moments. In terms of magnetic force theorem calculations we also demonstrate how a reduction of symmetry leads to the existence of canted magnetic states.
A Monte Carlo method was developed to calculate neutron time constants by first calculating the eigen-distribution of the neutron, then calculating the neutron time constant based on the distribution. For supercritica...
详细信息
A Monte Carlo method was developed to calculate neutron time constants by first calculating the eigen-distribution of the neutron, then calculating the neutron time constant based on the distribution. For supercritical or critical systems, the results are consistent with the α calculational method in the MCNP code. For subcritical systems, the MCNP4C code fails to finish the calculation, while the DSMC code based on the new method runs successfully with reasonable results.
This paper presents an extension of the hybrid scheme proposed by Wang et al. (J. Comput. Phys. 229 (2010) 169-180) for numerical simulation of compressible isotropic turbulence to flows with higher turbulent Mach num...
详细信息
The flow of ions through permeable channels causes voltage drop in physiological nanodomains such as synapses, dendrites and dendritic spines, and other protrusions. How the voltage changes around channels in these na...
详细信息
The understanding of fast exit and evacuation situations in crowd motion research has received a lot of scientific interest in the last decades. Security issues in larger facilities, like shopping malls, sports center...
详细信息
ISBN:
(纸本)9781467357159
The understanding of fast exit and evacuation situations in crowd motion research has received a lot of scientific interest in the last decades. Security issues in larger facilities, like shopping malls, sports centers, or festivals necessitate a better understanding of the major driving forces in crowd dynamics. In this paper we present an optimal control approach modeling fast exit scenarios in pedestrian crowds. The model is formulated in the framework of mean field games and based on a parabolic optimal control problem. We consider the case of a large human crowd trying to exit a room as fast as possible. The motion of every pedestrian is determined by minimizing a cost functional, which depends on his/her position and velocity, the overall density of people, and the time to exit. This microscopic setup leads in a mean-field formulation to a nonlinear macroscopic optimal control problem, which raises challenging questions for the analysis and numerical simulations. We discuss different aspects of the mathematical modeling and illustrate them with various computational results.
We study the feasibility of data based machine learning applied to ultrasound tomography to estimate water-saturated porous material parameters. In this work, the data to train the neural networks is simulated by solv...
详细信息
We study the stochastic SIR epidemic model with infection-age dependent infectivity for which a measure-valued process is used to describe the ages of infection for each individual. We establish a functional law large...
详细信息
Starting from the topological arrangement of carbon atoms an algorithm is given for the construction of nanotube Cartesian coordinates. The final relaxed structures were obtained by a molecular mechanics calculation w...
Starting from the topological arrangement of carbon atoms an algorithm is given for the construction of nanotube Cartesian coordinates. The final relaxed structures were obtained by a molecular mechanics calculation where the carbon‐carbon interactions were supposed only between neighboring atoms of the initial tiling. In a given tiling we obtained toroidal or helical structures depending on the special position of the super cell parallelogram.
暂无评论