Deterling edges of ol>jecfs in their images is a ba.roblc»> in computa.lional vision. The scale-space technique inii'Oduced by Witkin [I 1} provides means of using local and global r·m.<cmi»g i» lora.ling edges. This approach has a major drawback: il is diflicu/1 to obtain accumtely the /ocati011S of /he 'semantically meaningful' edges. We have refined the deflnilion of scale-space,'""' i...

A method is described for folding polymers to specific target conformations. The approach uses a fast but approximate dynamics algorithm, coupled with a genetic algorithm that is used to evolve the large number of free parameters needed. The dynamics algorithm uses a state transition matrix approach. At each time step, the distances between pairs of atoms are adjusted by shifting them from Dij ...

A k × uλ matrix M = [dij ] with entries from a group U of order u is called a (u, k, λ)-difference matrix over U if the list of quotients dildjl, 1 ≤ l ≤ uλ, contains each element of U exactly λ times for all i ̸= j. D. Jungnickel has shown that k ≤ uλ and it is conjectured that the equality holds only if U is a p-group for a prime p. On the other hand, A. Winterhof has shown that some known res...

We also proved a softer version of statement 2 as cheeger’s inequality i.e. Cheeger’s Inequality: 1−λ2 2 ≤ h(G) ≤ √ 2(1− λ2) Note:The same results also hold for a weighted graph which is not d regular.In that case we define define a matrix of degrees D,with Dii=degree of vertex i= ∑ j w(i, j) and Dij = 0∀i 6= j.Then M is given by L=D−1/2AD−1/2.It may be noted that M = A d for a d-regular graph....

This paper presents a new method for the recognition of Arabic text using global fmtures and Fuzzy ARTMAP neural network The method is divided into three major steps. The first step is digitization and pre-processing to create connected component. The secondstep is concerned with fmture extraction, where global f w r e s of the input word are used to extract features such as number of suhvorch,...

We consider the non-metric multidimensional scaling problem: given a set of dissimilarities ∆, find an embedding whose inter-point Euclidean distances have the same ordering as ∆. In this paper, we look at a generalization of this problem in which only a set of order relations of the form dij < dkl are provided. Unlike the original problem, these order relations can be contradictory and need no...

The reduction of electrode wear is very important for high finish and high accuracy machining in microEDM. Electrically conductive CVD diamond has shown almost zero electrode wear, even at short pulse duration of 3μs, which is extremely important for maintaining the desired shape. This research involves an investigation into the EDM performance of the electrically conductive CVD diamond with re...

K. W. Madison, P. K. Patel, M. Allen, D. Price, R. Fitzpatrick, and T. Ditmire Department of Physics, The University of Texas at Austin, Austin, Texas 78712, USA Physics and Advanced Technology Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, USA Department of Nuclear Engineering, University of California at Berkeley, Berkeley, California 94720, USA (Received 14...

In this paper, we first investigate the power spectral densities (PSD) of bipolar modulated Direct Sequence Ultra Wide Band (DS-UWB) signals using various pulse shapes under the FCC UWB emission mask. Considered pulse shapes are the first five derivatives of the Gauss pulse (p1, p2, p3, p4 and p5), the first four orthogonal modified Hermite waveforms, and Daubechies wavelets (db-q). It is obser...

The paper gives a systematic way for the development of hybrid control systems, i.e. to reene speciications written in DC (Duration Calculus) into automata models. Firstly, DC formulas are extended with iteration form and a technique for deriving plant automata from DC formulas is presented. Then, a speciication of control automata can be synthesized from plant automata with respect to requirem...