19,034 research outputs found
Design of a high-speed valve
A high‐speed valve has been designed for opening a deLaval nozzle in times less than 10^(−3) sec
Series Prediction based on Algebraic Approximants
It is described how the Hermite-Pad\'e polynomials corresponding to an
algebraic approximant for a power series may be used to predict coefficients of
the power series that have not been used to compute the Hermite-Pad\'e
polynomials. A recursive algorithm is derived and some numerical examples are
given.Comment: 9 pages, ISRN Applied Mathematics, in pres
Correlation Energy Estimators based on M{\o}ller-Plesset Perturbation Theory
Some methods for the convergence acceleration of the M{\o}ller-Plesset
perturbation series for the correlation energy are discussed. The
order-by-order summation is less effective than the Feenberg series. The latter
is obtained by renormalizing the unperturbed Hamilton operator by a constant
factor that is optimized for the third order energy. In the fifth order case,
the Feenberg series can be improved by order-dependent optimization of the
parameter. Alternatively, one may use Pad{\'e} approximants or a further method
based on effective characteristic polynomials to accelerate the convergence of
the perturbation series. Numerical evidence is presented that, besides the
Feenberg-type approaches, suitable Pad{\'e} approximants, and also the
effective second order characteristic polynomial, are excellent tools for
correlation energy estimation.Comment: 21 pages, 87 references, LaTeX2e, elsart.cls, uuencoded compressed
tar file created by csh script uufiles. J. Mol. Struct. (THEOCHEM), in press.
Postscript and dvi also available via
http://www.chemie.uni-regensburg.de/preprint.html and
ftp://rchs1.uni-regensburg.de/pub/preprint/TC-QM-96-
A computer program for the generation of logic networks from task chart data
The Network Generation Program (NETGEN), which creates logic networks from task chart data is presented. NETGEN is written in CDC FORTRAN IV (Extended) and runs in a batch mode on the CDC 6000 and CYBER 170 series computers. Data is input via a two-card format and contains information regarding the specific tasks in a project. From this data, NETGEN constructs a logic network of related activities with each activity having unique predecessor and successor nodes, activity duration, descriptions, etc. NETGEN then prepares this data on two files that can be used in the Project Planning Analysis and Reporting System Batch Network Scheduling program and the EZPERT graphics program
DISCUSSION: FINANCING AGRICULTURAL RESEARCH AND EDUCATION IN A PERIOD OF TIGHT BUDGETS
Public Economics,
Bifurcation analysis of a power-factor-correction boost converter : uncovering fast-scale instability
Author name used in this publication: Chi K. TseAuthor name used in this publication: Herbert H. C. luRefereed conference paper2002-2003 > Academic research: refereed > Refereed conference paperVersion of RecordPublishe
Boundaries between fast- and slow-scale bifurcations in parallel-connected buck converters
Author name used in this publication: Herbert H. C. IuAuthor name used in this publication: Chi K. TseRefereed conference paper2001-2002 > Academic research: refereed > Refereed conference paperVersion of RecordPublishe
Alien Registration- Carr, Herbert H. (Bangor, Penobscot County)
https://digitalmaine.com/alien_docs/14134/thumbnail.jp
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