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Dynamic spectrum access is an effective approach to improve the spectrum utilization. When primary user (PU) leases its spectrum to secondary users (SU), the spectrum efficiency can be enhanced, however, PU might be interfered by the co-existence of SU. This paper considers the situation that PU is willing to coexist with SU once it is paid and its Signal to Interference-plus-Noise Ratio (SINR) is...
Human workers and robots are two major workforces in modern factories. For safety reasons, they are separated, which limits the productive potentials of both parties. It is promising if we can combine human's flexibility and robot's productivity in manufacturing. This paper investigates the modeling and controller design method of workspace sharing human-robot assembly teams and adopts a two-layer...
Intensity of human causal induction is expressed by statistical models in cognitive science. A statistical index, pARIs, which is one of the models of human causal induction, has good performance on some tests. The form of pARIs is nearly equal to one of Jaccard index. However, it has not been known yet why pARIs can be related to intensity of human causal induction. In this study, we propose pARIX...
This paper introduces the nonlinearity index theory for missile flight mechanics analysis. Further, the nonlinearity of a longitudinal and lateral-directional nonspinning missile simulation model is analyzed over the entire flight envelope. The aerodynamic coefficient envelope is flight speed, angle of attack and angle of sideslip region. Nonlinearity index theory provides a new methodology for measuring...
This contribution concerns the unscented Kalman filter (UKF) for higher index nonlinear differential-algebraic equation (DAE) systems. First, a short introduction to DAE systems is given. A solution concept for nonlinear DAE systems is discussed focusing on properties which are essential for the application of the UKF algorithm. The introduction of a stochastic noise in DAE systems and the contrast...
Due to the diversity of processor architectures and application memory access patterns, the performance impact of using local memory in OpenCL kernels has become unpredictable. For example, enabling the use of local memory for an OpenCL kernel can be beneficial for the execution on a GPU, but can lead to performance losses when running on a CPU. To address this unpredictability, we propose an empirical...
In this paper, our work is to focus on the almost sure connectivity properties of secure wireless sensor networks. We consider a wireless sensor network which is generated randomly using random key pre distribution scheme given by Eschenauer and Gligor under non-full visibilitys. Here, we consider a sensor network in 2-dimensional space, and a sequence X„ = {Xi, X2,…Xn}, with n sensor nodes distributed...
Image quality assessment (IQA) has become indispensable part of image processing applications since times. Image quality assessment deals with the evaluation of image quality using different measures. The Goal of image quality assessment is to provide a metric that can estimate the perceived quality of an image instinctively. The assessment of IQA metric gives optimum result when human visual system...
Studying the patterns hidden in gene expression data helps to understand the functionality of genes. But due to the large collection of genes and the complicated biological networks it is hard to study the generated large volume of data which often contains millions of measurements. In general clustering techniques are used to determine natural structures and capture exciting patterns from the given...
The Lambert W function possesses branches labelled by an index k. The value of W therefore depends upon the value of its argument z and the value of its branch index. Given two branches, labelled n and m, the branch difference is the difference between the two branches, when both are evaluated at the same argument z. It is shown that elementary inverse functions have trivial branch differences, but...
We have conducted ADL cognitive cooking rehabilitations for dementia patients and higher brain dysfunction people to promote their self-reliance. This paper focuses on attention behavior during cooking rehabilitation. We propose a cooking attention behavior model integrating an attention flow extracted from a cooking task model in a topdown manner with a saliency map configured from an early human...
With the prosperity of the Open Source Software, various software communities are formed and they attract huge amounts of developers to participate in distributed software development. For such software development paradigm, how to evaluate the skills of the developers comprehensively and automatically is critical. However, most of the existing researches assess the developers based on the Implementation...
This paper deals with the symbolic solution of the switched current circuits. As is described, the general principle of the transformation graph method can be used for finding admittance matrix of medium size networks and/or sub-networks. The admittance matrix is assembled from four submatrices after reduction each submatrix by partial reduction formula. There is described principle for decomposition...
In this work we present a Discontinuous Galerkin Time Domain (DGTD) scheme, combined with a second-order Leap-Frog (LF2) time integrator, to solve Maxwell's equations. The dispersion and dissipation properties, together with an analysis of the computational costs of the method are investigated and compared with the classical Finite-Difference Time-Domain (FDTD) method. We show that DGTD methods have...
Often new insights and advancements are made by a detailed study of the problem and the solution space. The area of community finding has had many algorithms proposed recently, but to our knowledge there have not been any detailed studies of the solution space. In this paper, we present two algorithms for enumerating and unranking the possible valid community assignments for a network. To demonstrate...
In entity name disambiguation, performance evaluation of any approach is difficult. This is due to the fact that correct or actual results are often not known. Generally for evaluation purpose, three measures namely precision, recall and f-measure are used. They all are external validity indices because they need golden standard data. But in Bibliographic databases like DBLP, Arnetminer, Scopus, Web...
Finding the optimal number of groups in the context of a clustering algorithm is identified as a difficult problem. In this article, we automate this choice for the spectral clustering algorithm with a novel heuristic. Our method is deterministic, and remarkable by its low computational burden. We show its effectiveness with respect to the state of the art, and further investigate assumptions underlying...
This paper presents a novel method for the kinematic optimization of Stewart-Gough platform. A proper motion domain should satisfy three kinds of requirements: realization of direct motion target, singularity-free kinematics and uniqueness of direct kinematics solution. The rationality of these requirements is proved then. After present a group of combined constraints for motion domain optimization,...
COSMO-SkyMed (CSK), a constellation composed of four Italian satellites equipped with X-band high-resolution SAR sensors, could capture the damage situation from the typhoon Haiyan throughout the event in spite of the frequent cloud cover condition. This study performs the investigation on the devastation in Tacloban City using a Multitemporal Correlation (MTR) map. Then calculate the Hyperboloid...
In this paper we present a new approach for the measurement of multiple digital holograms at different positions in space that can be combined to one high resolution hologram. The reconstruction is based on a phase shifting approach, where the CCD sensor and the reference wave are moved simultaneously along different positions in x and y. An inclination of the reference wave induces a phase shift...
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