1,051 research outputs found
Probabilistic Human Mobility Model in Indoor Environment
Understanding human mobility is important for the development of intelligent
mobile service robots as it can provide prior knowledge and predictions of
human distribution for robot-assisted activities. In this paper, we propose a
probabilistic method to model human motion behaviors which is determined by
both internal and external factors in an indoor environment. While the internal
factors are represented by the individual preferences, aims and interests, the
external factors are indicated by the stimulation of the environment. We model
the randomness of human macro-level movement, e.g., the probability of visiting
a specific place and staying time, under the Bayesian framework, considering
the influence of both internal and external variables. We use two case studies
in a shopping mall and in a college student dorm building to show the
effectiveness of our proposed probabilistic human mobility model. Real
surveillance camera data are used to validate the proposed model together with
survey data in the case study of student dorm.Comment: 8 pages, 9 figures, International Joint Conference on Neural Networks
(IJCNN) 201
Experimental Investigation of the Vibro-impact Capsule System
Dr. Yang Liu would like to acknowledge the financial support for the Small Research Grant (31841) by the Carnegie Trust for the Universities of Scotland. This work is also partially supported by the National Natural Science Foundation of China (Grant Nos. 11672257 and 11402224), the Natural Science Foundation of Jiangsu Province of China (Grant No. BK20161314).Peer reviewedPublisher PD
Application of Finite Element Analysis in Multiscale Metal Forming Process
The application of finite element analysis has been presented in multiscale metal forming process. A 3D finite element method (FEM) has first been proposed to analyze the deformation mechanism of thin strip cold rolling with the consideration of friction variation in deformation zone. The crystal plasticity finite element method (CPFEM) is applied on the simulation of surface asperity flattening in the uniaxial planar compressing process. 3D Voronoi tessellation and frictional modeling have been applied in microforming processes. All simulation results from the proposed modeling have been validated by the related experimental results
Thomson backscattering in combined two laser and magnetic field
The Thomson backscattering of an electron moving in combined fields is
studied by a dynamically assisted mechanism. The combined fields are composed
of two co-propagating laser fields and a magnetic field, where the first laser
field is strong and low-frequency while the second is weak and high-frequency,
relatively. The dependence of fundamental frequency of emission on the ratio of
incident laser high-to-low frequency is presented and the spectrum of
backscattering is obtained. It is found that, with a magnetic field, the peak
of the spectrum and the corresponding radiation frequency are significantly
larger in case of two-laser than that in case of only one laser. They are also
improved obviously as the frequency of the weak laser field. Another finding is
the nonlinear correlation between the emission intensity of the backscattering
and the intensity of the weak laser field. These results provide a new
possibility to adjust and control the spectrum by changing the ratios of
frequency and intensity of the two laser fields.Comment: 13 pages, 4 figure
Riesz transform on manifolds with ends of different volume growth for
Let , , be complete, connected and non-collapsed
manifolds of the same dimension, where , and suppose
that each satisfies a doubling condition and a Gaussian upper bound for
the heat kernel. If each manifold has volume growth either bigger than
two or equal to two, then we show that the Riesz transform \nabla \L^{-1/2}
is bounded on for each on the gluing manifold
.Comment: 38p
The Relationship between Virtual Reality Technology and Anxiety State of Parturient Women with Labor Pain
As per the authors' request, the sequence of the affiliations have been adjusted accordingly
Frozen Concentrated Orange Juice Futures Prices, the Quality Option and Temperature
Previous research on the effect of fundamental factors upon FCOJ futures prices focused on the effect of decreases in temperature below freezing. However, a large proportion of FCOJ futures price variability remains unexplained. We recognize that the FCOJ futures contract provides an implicit quality option to the seller, by allowing delivery of the cheaper of FCOJ from Florida and FCOJ from Brazil. We value this option and show that it is a substantial percentage (14.7%) of FCOJ futures prices, on average. Our regression of FCOJ futures returns upon changes in the value of the option indicates that futures returns are significantly related to the option value in winter and in spring. Our results also show that the quality option provides substantial incremental (7-10%) explanatory power over that provided by decreases in temperature below freezing. Our research supports the view that futures prices are largely responsive to fundamental factors
Association rules between the microstructure and physical mechanical properties of rock-mass under coupled effect of freeze-thaw cycles and large temperature difference
The mechanical properties of fractured rock mass are largely dependent on the fracture structure under the coupling of freeze-thaw cycles and large temperature difference. Based on the traditional macroscopic continuum theory, the thermal and mechanical model and the corresponding theories ignore the material internal structure characteristics, which add difficulty in describing the mesoscopic thermal and mechanical behavior of the fractured rock mass among different phases. In order to uncover the inherent relationship and laws among the internal crack development, structural change and the physical and mechanical properties of rock under strong cold and frost weathering in cold area, typical granite and sandstone in cold region were analyzed in laboratory tests. The SEM scanning technology was introduced to record the microstructural change of rock samples subject to freeze-thaw cycles and large temperature difference. Association rules between the microstructure and the physical mechanical properties of rock mass were analyzed. The results indicated that, with the increase of the cyclic number, the macroscopic physical and mechanical indexes and the microscopic fracture index of granite and sandstone continuously and gradually deteriorate. The width of original micro crack continues to expand and extend and new local micro cracks are generated and continue to expand. The fracture area and width of the rock increase and the strength of the rock is continuously damaged. In particular, the strength and elastic modulus of granite decrease by 20.2% and 33.36%, respectively; the strength and elastic modulus of sandstone decrease by 33.4% and 36.43%, respectively
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