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تعداد نتایج: 16852469 فیلتر نتایج به سال:
We propose a Gaussian mixture model for background subtraction in infrared imagery. Following a Bayesian approach, our method automatically estimates the number of Gaussian components as well as their parameters, while simultaneously it avoids over/under fitting. The equations for estimating model parameters are analytically derived and thus our method does not require any sampling algorithm th...
Background Process models offer opportunities to explore the effectiveness of different program and policy alternatives by varying input behaviors and model parameters to reflect programmatic/policy effects. Methods Traditional theoretical HIV models set modeling parameters a priori and a small change in model parameters often gives widely varying results for the same behavioral inputs. The Asi...
Background: Mental health is one of the most important factors in aptitude growth of university students. Many Studies suggest that students have some types of emotional disorders. The purpose of this study is to compare mental health of Lorestan University students in relation to some academic and personal variables. Materials and Methods: This study was a descriptive research. The sample con...
The application of anomaly detection has been given a special place among the different processings of hyperspectral images. Nowadays, many of the methods only use background information to detect between anomaly pixels and background. Due to noise and the presence of anomaly pixels in the background, the assumption of the specific statistical distribution of the background, as well as the co...
Background: This article provides a description of treatment approach, the theoretical underpinning and a summary of empirical findings to date. Conclusion: A behavioral problem of students is one of the main obstacles in training process that has a devastating impact on quality of life of the students and their families. Recently, Functional Communication Training (FCT)&...
increasing academic and professional language demands around the world are not a deniable fact. the purpose of this study was to investigate english language needs and communication needs of the chemistry students at master and ph.d. levels at the iranian universities. in this research, different methods were used including un-structured interview, structured interview, and two sets of question...
Background: Occupational therapy in the school setting provides services for students with special needs. The occupational therapist uses a task analyze educational activities in order to help the student participate successfully in the educational environment. They implement direct intervention on sensory motor perceptual-cognitive and psychosocial dysfunctions of students and indirect i...
There has been considerable interest in immersive and realistic virtual environment system and how to improve human and computer interaction has been a main challenge. For vision-based human-computer interaction, extraction of user region from camera images is an essential part. In this paper, we propose a background subtraction method that segments dynamic projected background in a rear-projec...
By using the relativistic top theory, we derive a relativistic top deviation equation. This equation turns out to be a generalization of the geodesic deviation equation for a pair of nearby point particles. In fact, we show that when the spin angular momentum tensor associated to the top vanishes, such a relativistic top deviation equation reduces to the geodesic deviation equation for spinless...
The propagation of UHECRs is affected by the intergalactic magnetic fields that were produced during the course of the large scale structure formation of the universe. We adopt a novel model where the large scale extragalactic magnetic fields (EGMF) are estimated from local dynamic properties of the gas flows in hydrodynamic simulations of a concordance ΛCDM universe. With the model magnetic fi...
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