suppose $pi:mathcal{a}rightarrow mathcal{b}$ is a surjective unital $ast$-homomorphism between c*-algebras $mathcal{a}$ and $mathcal{b}$, and $0leq aleq1$ with $ain  mathcal{a}$. we give a sufficient condition that ensures there is a proection $pin mathcal{a}$ such that $pi left( pright) =pi left( aright) $. an easy consequence is a result of [l. g. brown and g. k. pedersen, c*-algebras of real...

Contrast-enhanced MRA methods which provide temporal information, such as the 3D-TRICKS technique[1], have tradeoffs between temporal resolution and spatial resolution[2]. Acquiring data with adequate temporal resolution often limits the achievable spatial resolution. It is desirable to have high in-plane resolution along with good temporal resolution. Recently we have shown that angularly unde...

A novel pose normalization method, based on panoramic views and reflective symmetry, is presented. Initially, the surface of a 3D model is projected onto the lateral surface of a circumscribed cylinder, aligned with the primary principal axis of space. Based on this cylindrical projection, a normals’ deviation map is extracted and using an octree-based search strategy, the rotation which optima...

In this paper, an indirect adaptive fuzzy sliding mode control scheme is designed for hybrid electric bus. The trajectory tracking control for stopping the bus in a bus station is proposed. The control strategies of regenerative braking in the hybrid electric bus add the control difficulty of the longitudinal braking system. Its nonlinearities are estimated by adaptive fuzzy method and projecti...

Matching algorithms use random start local search and a D pose recovery algorithm to nd optimal matches between D object models and D image fea tures An algorithm using only a weak perspective ap proximation to full D perspective solves a subset of the test problems presented A second algorithm al ways uses an iterative D pose algorithm to account for D perspective and solves all test problems ...

This paper presents a hybrid simulator for the fast calculation of x-ray projections. Uncollided radiations are determined with a ray-driven method whereas the scattering signal is partitioned into single and multiple scattering, respectively estimated with an accelerated deterministic method and a coarse Monte Carlo simulation. The simulator takes into account the full acquisition chain, from ...

This paper considers the problem of real-time mode scheduling in linear time-varying switched systems subject to a quadratic cost functional. The execution time of hybrid control algorithms is often prohibitive for real-time applications and typically may only be reduced at the expense of approximation accuracy. We address this trade-off by taking advantage of system linearity to formulate a pr...

Temporal/energy (hybrid) subtraction is a technique for removing soft-tissue motion artifact from digital subtraction angiograms. The diagnostic utility of hybrid subtraction for i.v. and intraarterial angiography was assessed in the first 9 months of operation of a dedicated production system. In i.v. carotid arteriography (N = 127), hybrid subtraction (H) provided a double-profile projection ...

Hybrid components combining the optical power of a refractive and diffractive system can form compact doublet lenses that correct various aberrations. Unfortunately, diffraction efficiency these devices decreases as function deflection angle over element aperture. Here, we address this issue, compensating for chromatic dispersion correcting monochromatic aberrations with centimeter-scale hybrid...

for many years, researchers have studied high accuracy methods for recognizing the handwriting and achieved many significant improvements. however, an issue that has rarely been studied is the speed of these methods. considering the computer hardware limitations, it is necessary for these methods to run in high speed. one of the methods to increase the processing speed is to use the computer pa...