A procedure is developed for testing the accuracy of approximations to probability density functions (PDF) in queueing theory. The approximation can be constructed from the derivatives and moments of a given PDF, if t...
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A procedure is developed for testing the accuracy of approximations to probability density functions (PDF) in queueing theory. The approximation can be constructed from the derivatives and moments of a given PDF, if they exist. Four subjects are considered which can be used as criteria to judge the goodness of approximations over the entire range of values of the traffic intensity parameter, rho . A detailed example is presented to discuss the effect which different derivatives/moments matching combinations have on the accuracy of the approximations. The exponential factor is used as an optimizing parameter.< >
There is a strong demand in industry for real time monitoring of chemical ***- tronic monitoring techniques have the advantage of a fast response time and good tolerance for high temperature and high pressure *** pape...
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There is a strong demand in industry for real time monitoring of chemical ***- tronic monitoring techniques have the advantage of a fast response time and good tolerance for high temperature and high pressure *** paper reports on the current status of an ongoing research project involving the design of a planar dielectric resonator based chemical species monitoring probe that can be made very small for localized sensing and will enable real time monitoring of concentration changes in a broad range of chemical reaction processes.
Static and dynamic numerical device modeling based on dot product evaluation of multidimensional Bernstein polynomial interpolants to evaluate device operating characteristics is presented as an alternative to analyti...
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Static and dynamic numerical device modeling based on dot product evaluation of multidimensional Bernstein polynomial interpolants to evaluate device operating characteristics is presented as an alternative to analytical modeling and table look-up modeling schemes that have been proposed. The model formulation satisfies the requirements imposed by the algebraic-differential equation solution algorithms of most simulators, namely continuity of the output variables and preservation of the monotonicity and concavity or convexity of the data. It is to be noted, however, that those are necessary but not sufficient conditions. Simulator convergence is improved by treating the intrinsic node charges as state variables and using their variations over iteration steps as an iteration criterion along with the node voltage variation checks. MOSFET is taken as a benchmark device. Experimental results to illustrate the effect of the basic premises of the numerical model on simulation performance are presented.< >
A linear time-varying (LTV) framework for modeling interpolation from nonuniformly spaced samples is described. This LTV model is used to obtain a frequency-domain description of the interpolation process. The frequen...
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A linear time-varying (LTV) framework for modeling interpolation from nonuniformly spaced samples is described. This LTV model is used to obtain a frequency-domain description of the interpolation process. The frequency-domain characteristics of a number of commonly used interpolators are presented. In addition, this frequency-domain description permits the design of one-dimensional interpolators through the use of two-dimensional digital filter design techniques. A two-dimensional frequency sampling design approach is explored in an attempt to better approximate the ideal interpolator.< >
In this note we discuss a quadratic tracking problem for systems described by infinite dimensional evolution equations. We present theoretical results for feedback controls as well as general approximation results. Ap...
In this note we discuss a quadratic tracking problem for systems described by infinite dimensional evolution equations. We present theoretical results for feedback controls as well as general approximation results. applications to a problem arising in active noise suppression are given.
The method of moments has been discussed in brief and then applied to analyze a coupled microstrip *** selective values of input variables have been used to calculate the microstrip line parameters,under the quasi-TEM...
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The method of moments has been discussed in brief and then applied to analyze a coupled microstrip *** selective values of input variables have been used to calculate the microstrip line parameters,under the quasi-TEM mode approach.
A method for accurately solving inviscid compressible flow in the subcritical and supercritical regimes about complex configurations is presented. The method is based on the use of unstructured triangular meshes in tw...
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The problem of calculating the stability of steady state solutions of differential equations is treated. Leading eigenvalues (i.e., having maximal real part) of large matrices that arise from discretization are to be ...
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The paper describes a 3-dimensional Shape Descriptor Function (SDF) which is invariant under the action of SO(3). We concentrate here on the analytical derivation of the SSD, and show how certain requirements constrai...
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A method is given for parallelizing the problems of directed graphs on a single-instruction multiple-data (SIMD) machine model that uses only nearest-neighbor connections for communication and has no facility for loca...
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A method is given for parallelizing the problems of directed graphs on a single-instruction multiple-data (SIMD) machine model that uses only nearest-neighbor connections for communication and has no facility for local indirect addressing. Each vertex of the graph is assigned to a processor in the machine. Rules for labeling are introduced that support the use of a simple algorithm for movement of data along the edges of the graph. Additional algorithms are defined for addition and deletion of edges. Modifying or adding a new edge takes the same time as parallel traversal. This combination of architecture and algorithm defines a system that is relatively simple to build and can do fast graph processing. All edges can be traversed in parallel in time O(T), where T is empirically proportional to the average path length in the embedding times the average degree of the graph. An extension to the above method is presented which allows for enhanced performance by allowing some broadcasting capabilities.< >
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