We present an efficient method for robustly calculating time-frequency attributes of a signal, including instantaneous mean frequency, bandwidth, and kurtosis. Most current approaches involve a costly intermediate step of computing a (highly oversampled) 2-d bilinear time-frequency representation (TFR), which is then collapsed to the I-d attribute. Using the principles of hybrid linearhilinear ...

The results of a numerical investigation of the electromagnetic scattering from two-dimensional (2-D) targets on a time-evolving sea surface are presented. The 2-D radar cross section (RCS), or “echo width,” is computed as a function of time as the sea surface evolves linearly using the spectrally accelerated generalized forward-backward method. It is shown that the RCS varies with time on the ...

This section is devoted to the discussion of two fundamental (partial) differential equations, that arise in the context of Markov diffusion processes. After giving a brief introduction of continuous-time continuous state Markov processes, we introduce the forward and backward equation, and provide a heuristic derivation of these equations for diffusion processes. We also discuss some examples ...

or equivalently (1.3) (ad− bc)(a′d′ − b′c′) = (aa′ + bc′)(cb′ + dd′)− (ab′ + bd′)(ca′ + dc′). A particular case of this is a = A, b = B, . . . , d′ = D′ in Z[A,B,C,D,A′, B′, C ′, D′]. In Section 2 we will describe how algebraic identities that make sense over all commutative rings can be proved by working only over C. This is a really significant idea! In Section 3 we’ll state two identities ab...

This paper reviews a cyclic scheduling model of repetitive manufacturing environments consisting of exible machines and multi-stage jobs. We explicitly model two system performance measures, throughput and ow time, while incorporating variability arising from uncertainty in operation processing times. We present an iterative approximation scheme to estimate the two moment behavior of our perfor...

(d) of this section to another interest crediting rate (the new rate) that satisfies the requirements of paragraph (d) of this section, the plan’s effective interest crediting rate is not in excess of a market rate of return for purposes of paragraph (d) of this section merely because the plan provides for the benefit of any participant who is benefiting under the plan (within the meaning of § ...

Dietary fats, or lipids, are a macronutrient class that includes fatty acids, triglycerides, and cholesterol. Fats supply fuel energy (9 kcal/g) and the essential fatty acids, linoleic and alphalinolenic acids. Fats, therefore, are a key factor in the maintenance of caloric balance and body weight. Specific fatty acids also serve as precursors for numerous biological pathways that influence inf...

We congratulate Luke Tierney for this paper, which even before its appearance has done a valuable service in clarifying both theory and practice in this important area. For example, the discussion of combining strategies in Section 2.4 helped researchers break away from pure Gibbs sampling in 1991; it was, for example, part of the reasoning that lead to the \Metropolis-coupled" scheme of Geyer ...

Preliminary results of t ¯ t cross section measurements and single top exclusion limits of the Tevatron experiments CDF and D∅ are presented. The different measurements are based on a dataset between 140 and 200 pb −1 corresponding to a data taking period from spring 2002 to September 2004. The t ¯ t cross section measurements are consistent with each other and the Standard Model prediction. Da...