Recent research on partitioning has focussed on the ratio-cut cost metric which maintains a balance between the sizes of the edges cut and the sizes of the partitions without xing the size of the partitions a priori. Iterative approaches and spectral approaches to two-way ratio-cut partitioning have yielded higher quality partitioning results. In this paper we develop a spectral approach to mul...

There are few techniques available for testing whether or not a family of parametric times series models fits a set of data reasonably well without serious restrictions on the forms of alternative models. In this paper, we consider generalised likelihood ratio tests of whether or not the spectral density function of a stationary time series admits certain parametric forms. We propose a bias cor...

New images of the radio Supernova Remnant (SNR) G65.1+0.6 are presented, based on the 408 MHz and 1420 MHz continuum emission and the HI-line emission data of the Canadian Galactic Plane Survey (CGPS). A large shell-like structure seen in the 2695 MHz Effelsberg map appears to have nonthermal spectral index. HI observations show structures associated with the SNR G65.1+0.6 in the radial velocit...

We propose two new spectral measures for graphs and networks which characterize the ratios between the width of the ‘‘bulk’’ part of the spectrum and the spectral gap, as well as the ratio between spectral spread and the width of the ‘‘bulk’’ part of the spectrum. Using these definitions we introduce the concept of golden spectral graphs (GSG), which are graphs for which both spectral ratios ar...

The spectral dependency of the particulate backscattering ratio is relevant in the fields of ocean color inversion, light field modeling, and inferring particle properties from optical measurements. Aside from theoretical predictions for spherical, homogeneous particles, we have very limited knowledge of the actual in situ spectral variability of the particulate backscattering ratio. This work ...

The continuous wavelet transform may be enhanced by deconvolution with the wavelet response function. After correcting for the coneof-influence, the power spectral density of the solar magnetic record as given by the derectified yearly sunspot number is calculated, revealing a spectrum of odd harmonics of the fundamental Hale cycle, and the integrated instant power is compared to a reconstructi...

The use of horizontal to vertical spectral ratios (HVSR) earthquake ground motions has become a standard technique characterize sites, especially those lacking subsurface measurements. Several studies have developed relationships between HVSR results and time-averaged shear-wave velocity in the upper 30 m (VS30). Other utilized calculated from motion Fourier amplitude spectra estimate VS30. Anc...

NMR spectral data from control subject and mice with (A) S. aureus infection and (B) S. aureus and S. pneumoniae infection and showing the separation between samples along the type of infection. Two components encapsulate 97 % (A) and 83 % (B) of the interclass variation. Fig. 2: The variable importance plot (VIP) shows the relative contribution that each metabolite makes to the difference betw...

This paper illustrates the use of the Modulo Time Plot to facilitate diagnosis of data acquisition systems and components. While conventional techniques, involving spectral analysis and histograms, provide certain useful and necessary measures of performance, the use of reordered sample sets has gained considerable popularity in recent work aimed at characterizing analog-to-digital converter er...

Detecting field diversities via remote sensing is becoming important to monitor vegetation dynamics at large scale. The characteristics of the remotely sensed image, depending on study organism and habitat, affect efficiency measuring ?-and ?-diversities. Therefore, we examined impact image resolutions spectral plot extents accuracy estimating forest ?-diversities compositional variances active...