A freeying space robot with a 6 DOF manipulator cannot follow an arbitrary trajectory in the 9D generalized coordinates(3 of the satellite orientation and 6 of the manipulator) with only manipulator joint control, though it was shown to be commonly controllable in the literature. In this paper, we propose a method to approximate the desired 9D path by introducing a perturbation around it. We ca...

In this paper, we present a multiscale “squiral" (square spiral) image processing (SIP) framework. An efficient spiral addressing scheme is deployed for standard pixel based square images to facilitate fast image processing. A SIP-based convolution technique is developed by simulating the “eye tremor" phenomenon of the human visual system. The multiscale SIP operators are constructed by convert...

The response of a point object in cone beam spiral scan is analysed. Based on the result a sufficient condition for the spiral scan long object problem employing backprojection is formulated. By making use of the sufficient condition a general class of exact, backprojection based reconstruction algorithms for spiral scan cone beam CT is developed which are capable of reconstructing a sectional ...

A scheme, applying a linearly polarized laser irradiating on T-type target which contains longitudinal followed by transverse target, is proposed to collimate the terahertz radiation. The results show that interaction between and can effectively reduce electron divergence while increasing maximum cut-off energy. In this way, radiation be well collimated enhancing its intensity. By using two-dim...

Cascade Hashing is a new dynamic hashing scheme which is based on Spiral Storage. The purpose of this paper is first to give a unified exposition of Linear Hashing, Spiral Storage and other dynamic hashing schemes, and second to describe a new method for storing overflow records. The method stores the overflow records in the main file itself and clusters overflow records from each primary bucke...

We propose a scheme to create an electronic Floquet vortex state by irradiating two-dimensional semiconductor with laser light carrying nonzero orbital angular momentum. analytically and numerically study the properties of states, methods analogous ones previously applied analysis superconducting states. show that such states are similar they exhibit wide range tunability. To illustrate potenti...

This paper investigates the use of the guard traces to improve the Time-Domain Transmission (TDT) waveform and eye diagram for a flat spiral delay line. Two types of guard trace are adopted to implement and analysis in microstrip line and stripline structures. One is Two Grounded Vias type Guard Trace (TGVGT) and the other is Open-Stub type Guard Trace (OSGT). The timedomain analysis results by...

Spiral Architecture is a new and powerful approach to a general-purpose machine vision system. Earlier research on the Spiral Architecture focused on the properties of undistorted translation, rotation and scaling. The research reported here uses the properties of the pixel address labelling scheme. The property of interest is the physical proximity of the hexagonal pixels with neighbouring add...

We provide a novel scheme in designing no-loss bent light-pipe with the help of a transformation of elliptical form on equiangular spiral.