An online estimation algorithm of landing footprints based on the drag acceleration-energy profile is proposed for an entry hypersonic vehicle. Firstly, Evolved Acceleration Guidance Logic Entry (EAGLE), profiles are designed. To track obtained by interpolation, a acceleration tracking law Secondly, constraint model no-fly zone, flying around strategies different conditions, and reachable area ...

Quintessence is often invoked to explain the universe's acceleration suggested by type Ia supernovae observations. The aim of this letter is to study the validity of using a constant equation of state for quintessence models. We shall show that this hypothesis strongly constraint the form of the scalar potential. .

We discuss the dynamics of a quintessence model involving two coupled scalar fields. The model presents two types of solutions, namely solutions that correspond to eternal and transient acceleration of the universe. In both cases, we obtain values for the cosmological parameters that satisfy current observational bounds as well as the nucleosynthesis constraint on the quintessence energy density.

Introduction: Dynamic contrast enhanced (DCE) imaging employs serial T1-weighted scans to quantify the pharmacokinetics of an injectable contrast agent. This allows assessment of tissue properties such as vascular permeability. Clinical applications of DCE, such as tumor characterization, will benefit from improvements in spatiotemporal resolution and volume coverage beyond what is possible tod...

Abstract. In this paper, the time-optimal velocity planning problem for five axis CNC machining along a given parametric tool path under chord error, acceleration, and jerk constraints is studied. The velocity planning problem under confined chord error and acceleration is reduced to an equivalent linear programming problem by discretizing the tool path and other quantities. As a consequence, a...

Vector quantization is an eecient compression technique for which many variants are known. Product code vector quantizers use multiple codebooks for coding separately features of a vector. In shape-gain and mean-shape-gain vector quantizers, the bottleneck in the encoder is a nearest neighbor search on a hypersphere. We deene an angular constraint for speeding up the search in shape-gain and me...

A capture region for missile guidance laws under field-of-view constraint is analyzed. To make a missile intercept a non-maneuvering target, physical constraints including seeker`s field-of-view and acceleration limit should be considered, because these constraints may restrict maneuver of the interceptor. The characteristics of look-angle constraint guidance laws is studied, and feasible traje...

The acceleration form of constraint equations is utilized in this paper to solve for the inverse dynamics of servoconstraints. A condition for the existence of control forces that enforce servo-constraints is derived. For overactuated dynamical systems, the generalized Moore-Penrose inverse of the constraint matrix is used to parameterize the solutions for these control forces in terms of free ...

In this paper, we propose a fast codebook generation algorithm for entropy-constrained vector quantization (ECVQ). The algorithm uses the angular constraint and employs a suitable hyperplane to partition the codebook and image data in order to reduce the search area and accelerate the search process in the codebook design. This algorithm allows significant acceleration in codebook design proces...

We propose a new Support Vector Machine classifier formulation which allows for an automatic computation of the bias and eliminates the equality constraint. We also present a new training algorithm, which is capable of providing fast training for our automatically biased SVM. We then show that this method allows for the application of acceleration methods which further increases the rates of co...