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Users require information fusion to reduce dimensionality for real world, complex decision-making. Typically, researchers design fusion systems based on limited data that does not capture all operating conditions seen in the real world (i.e. weather for video sensors). Fusion systems are of limited use when presented with poor data, inappropriate models, and unrealistic assumptions. Decision makers...
Tracking performance is a function of data quality, tracker type, and target maneuverability. Many contemporary tracking methods are useful for various operating conditions. To determine nonlinear tracking performance independent of the scenario, we wish to explore metrics that highlight the tracker capability. With the emerging relative track metrics, as opposed to root-mean-square error (RMS) calculations,...
Simultaneous Localization and Mapping (SLAM) is a widely used technique which can build up a map at unknown environment and figure out its position without prior map information. By applying SLAM method, this paper presents simple integrated navigation system for planar mobile robot equipped with vision sensor and encoders. Because of the nonlinearity of the measurement model, it is used a particle...
Energy constrained nature and unattended deployment of sensors motivates the need of special techniques for designing reliable wireless sensor networks. Recently many approaches are considering mobile sensor nodes to deal with this problem. But making all the sensors mobile involves more signaling overhead for network maintenance. It is energy efficient to move the base station which has no power...
Despite precise relative positioning performance of a GPS based navigation system, it may require the reference station in close boundaries and can be affected by satellite observation environments. Thus, this paper presents an INS and vision sensor integrated system, which uses a combination of feature points and the landmark whose position is already known in order to overcome the limitation of...
Software defined radio (SDR) has gained much interest in recent years due to the advancements in FPGA technology. FPGA provides the capability of programming analog components (Mixers, PLL, Filters etc...) which were traditionally implemented in hardware. In this paper digital functional blocks that need to be programmed in FPGA core are designed and simulated using Matlab for amplitude demodulation...
Interest in Self-Organized (SO) unmanned aerial vehicles (UAVs) systems is increasing because of their flexibility, versatility and economics. Many countries and industries are developing autonomous and swarming UAVs for reconnaissance, surveillance, intelligence gathering, and target engagement and neutralization. The processes for effectively developing these systems are still in their infancy....
With recent advancements in radar technology, RF characterization of dismounts has become feasible. This paper presents the initial steps taken in developing a physically-relevant parametric RF dismount model. The model assumes the data is composed of multiple interacting attributed scattering centers that can be associated to human body elements.
In this paper, a low computational method of efficiently and quickly handling large multivariate scattered data sets with a genetic algorithm for design parameter optimization is presented. The method presented combines the use of a genetic algorithm and the linear interpolation technique identified as Lipschitz Interpolation. Using this method we have improved the performance of the algorithm in...
Recent years have seen the emergence of Unmanned Aerial Systems performing roles that use various Radio Frequency (RF) systems. Thus, there is a need to use accurate and broadly capable signal propagation models to capture multi-path effects as well as atmospheric effects in system requirements analysis. One such model, the Variable Terrain Electromagnetic Parabolic Equation (VTRPE) model, enables...
Because of the advantages of compact size and high efficiency, today PMSM motor has attracted the attention in aerospace applications. We have designed a super high speed PMSM motor with 92% efficiency novel for a cryo-cooler compressor for NASA recently. The rated speed of the motor is 136 krpm and the rated output power is 1.85 kW. Considerable attention has been paid in the design due to the super...
Proliferation of collaboration environments brings new issues to the area of security. In this paper, we briefly describe the characteristics of security associated with collaboration environments. We also discuss and analyze several schemes in different areas of security, including access control, secure group communication, and security management. Another contribution of this paper is a proposed...
This research compares the results of five multispectral transforms applied to images of carbonized scrolls to determine which transform creates the best readable image. These transforms are vector quantization with principal components analysis, noise subspace projection, interference-and-noise-adjusted principal components analysis, convex cone analysis, and penalized discriminant analysis with...
This paper investigates the effects of amplitude dynamics on the operation of coupled oscillator arrays. The free running frequencies for achieving constant phase progression and arbitrary amplitude distribution are developed. A code structure that implements the system dynamics is suggested. Numerical results show that amplitude dynamics have significant effects on main beam errors and the side lobe...
A number of research issues are discussed on how best to visualize performance and vulnerability in complex and distributed network systems. A powerful paradigm would be to convey information about a distributed network to a decision maker using natural attributes of display systems such as color, shape, and other variables. Future visualizations are hypothesized to enable decision makers to better...
Multi-target detection is crucial in modern warfare. It is challenging to distinguish radar returns of multiple, separate targets from those of multiple reflection points on a single target. Methods developed so far use straightforward discrimination, which is computationally complex. In this paper, we propose ideas to detect multi-targets by using electromagnetic modeling and neural networks (NNs)...
DNA has been recognized as an efficient dispersion agent that individually exfoliate and chirality-fractionate single wall carbon nanotubes (SWCNTs) according to their diameter and metallicity. Amongst, single stranded d(GT)n DNA has been known to efficiently disperse individual-level nanotube and mediate their subsequent chirality separation, when eluted from an anion exchange column at various salt...
We hypothesize that we can improve the footprint by using a static non-linear flash encoding scheme for Analog to Digital (A/D) converters for an important set of functions. This architecture can reduce the number of comparators and resisters in a flash converter by 25%..
A Hinfin filter based on GPS dynamic locating method is put forward in this paper. The proposed method is able to decrease the current acceleration model error. Some examples show that the method can perform better in GPS dynamic locating than EKF for less computation consumption and higher locating accuracy.
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