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In the paper, a novel auxiliary truncated particle filtering for bearings-only maneuvering target tracking (ATPF-BOT) is proposed. In the proposed algorithm, a modified prior probability density function (PDF) is derived to solve the modeling uncertainty problem, which can simultaneously incorporate current measurement information and target characteristic information. Meanwhile, the proposal distribution...
Detection of moving and foreground objects is a key step in video-based object tracking within computer vision applications such as surveillance and traffic monitoring. Foreground object detection and segmentation is usually performed based on appearance. Hence, significant detection errors can be incurred due to shadows and light sources. Most existing shadow detection algorithms exploit a large...
Block-based motion estimation is an important component in many video coding standards that aims at removing temporal redundancy between neighboring frames. Traditional methods for block-based motion estimation such as the Exhaustive Block Matching Algorithm (EBMA) are capable of achieving good matching performance but are computationally expensive. Alternatives to EBMA have been proposed to reduce...
This study used high fidelity computer simulation to investigate the lighting conditions, specifically the solar radiation flux over the surface, on Phobos. Ephemeris data from the Jet Propulsion Laboratory (JPL) DE405 model was used to model the state of the Sun, Earth, Moon, and Mars. An occultation model was developed to simulate Phobos' self-shadowing and its solar eclipses by Mars. The propagated...
Computer Generated Forces (CGF) is a critical technique of virtual battlefield environment. According to the interoperability and compute capability requirement, the Simulation Object Runtime Database (SORD) method is presented. Then by studying the hierarchy and key characters of SORD, an object meta-model and implement method is given. And then the system services which are needed is founded and...
The development of computer processor has stepped into the era of multi-core, providing a good chance to spread the parallel discrete event simulation. The parallel programming model and synchronization problem during the parallelization of discrete event simulation on multi-core platform were discussed. A parallel discrete event simulator based on multi-core platform was designed and implemented...
Testing is an important aspect in effectiveness verification of the composability of simulation model. This paper introduces a context-driven testing approach that supports to confirm and improve the composability of model in composable simulation research. Context-driven testing is a feasible approach that specifies model test framework and algorithms of constraint modeling for test on three hierarchical...
One drawback with the simulation analysis and evaluation system of satellite navigation systempsilas service performance on positioning, velocity-measuring and timing is that it takes the analyzers too much time to run the simulation. A pc cluster based parallel simulation solution is proposed, using the analysis of global gridpsilas dilution of precision as an example. For load balancing, three schemes...
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