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A humanoid robot may suffer from slip since its two feet are not fixed on the ground. Slip occurrence may induce the loss of robot's balance. The previous literature focused on the detection or estimation of the slip occurrence, or only employed the translational acceleration regulation to overcome slip. This study proposes a slip prevention method by coordinating acceleration vector including the...
This paper considers the stabilization problem for a model arising in the control of noise, coupling the wave equation with a Kirchhoff plate equation on Riemannian manifold. By introducing nonlinear boundary feedback control, we establish the exponential energy decay for the problem. Our proofs rely on the multiplier method and the Riemannian geometry method.
Ontology offers a structured knowledge representation and provides formal interpretation of concepts which can be used in semantic similarity measuring. In this paper, we analyze these ontology-based approaches for semantic similarity computation and propose a new ontology-based measure relying on exploiting intent of the concept. Our measurement combines the idea of two popular semantic similarity...
Based on the Rayleigh-Plesset homogeneous hypothesis and the compressible mixture multiphase model, three-dimensional CFD numerical calculation model of high-speed projectile under water was built. Compared with the empirical formula, the consistency between it and results from model on the conditions of zero-angle attack and fixed cavitation number is good. Therefore, the validity of numerical method...
Two macro diversity handover algorithms (MDHO and MDHO-H) are proposed for the macro diversity handover of WiMAX system. MDHO algorithm is the improvement of Z algorithm. It selects the best m BSs with strongest signal strength as the diversity sets. Then the hysteresis margin is introduced and MDHO-H algorithm is proposed based on MDHO algorithm. Three algorithms are simulated and compared under...
Hydrodynamics of underwater supercavitating vehicles are characterized by coupling relationship between body and cavitation. While maneuvering, supercavitating vehicle depends on a bank-to-turn strategy for making a turn, and could not be described exactly by the kinematic model built under the condition of straight line navigation. Based on cavitation theory of unattached expansion, the paper establishes...
In this paper, an efficient feature extraction algorithm called orthogonal linear local spline discriminant embedding (O-LLSDE) is proposed for face recognition. Derived from local spline embedding (LSE), O-LLSDE not only inherits the advantages of LSE which uses local tangent space as a representation of the local geometry so as to preserve the local structure, but also makes full use of class information...
This paper addresses the questions of improving convergence performance for back propagation (BP) neural network. For traditional BP neural network algorithm, the learning rate selection is depended on experience and trial. In this paper, based on Taylor formula the function relationship between the total quadratic training error change and connection weights and biases changes is obtained, and combined...
To solve project cost control problem, the concept of project cost elasticity is introduced and the model of project cost elasticity analysis is proposed. Case study shows that the cost elasticity model is useful and helpful to control project costs. Finally, a road map is provided for stockholders to use cost elasticity model to control project costs.
In this paper, we present an adaptive refinement ratio algorithm for structured adaptive mesh refinement (SAMR) method based on SAMRAI framework. We developed our algorithm based on an example application program of SAMRAI framework, an AMR Euler gas dynamics application. The Euler class of this application provides routines for a sample application code that solves the Euler equations of gas dynamics...
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