1,201 research outputs found
Analytical study of catalytic reactors for hydrazine decomposition Quarterly progress report, 15 Jul. - 14 Oct. 1966
Computer programs used for formulating and solving integral and differential equations in study of catalytic reactors for hydrazine decompositio
Analytical study of catalytic reactors for hydrazine decomposition Quarterly progress report no. 1, 15 Apr. - 14 Jul. 1966
Analytic study of catalytic reactors for hydrazine decompositio
Theoretical investigation of radiant heat transfer in the fuel region of a gaseous nuclear rocket engine
Effect of fuel opacity on temperature distribution in gaseous nuclear rocket engin
Transient model of hydrogen/oxygen reactor
Numerical analysis of effects of transient response in catalytic ignition system to promote hydrogen-oxygen combustio
Analytical study of catalytic reactors for hydrazine decomposition. One and two dimensional steady-state programs, computer programs manual
Programs manual for one-dimensional and two- dimensional steady state models of catalyzed hydrazine decomposition reaction chamber
Study of hydrazine reactor vacuum start characteristics Quarterly progress report, 1 May - 31 Jul. 1969
Liquid hydrazine penetration into catalyst particles upon immersion and decomposition of hydrazine ga
Study of catalytic reactors for hydrogen- oxygen ignition Final progress report, 28 Aug. 1968 - 28 May 1969
Catalytic ignition system for promoting hydrogen, oxygen combustio
Stability of Influence Maximization
The present article serves as an erratum to our paper of the same title,
which was presented and published in the KDD 2014 conference. In that article,
we claimed falsely that the objective function defined in Section 1.4 is
non-monotone submodular. We are deeply indebted to Debmalya Mandal, Jean
Pouget-Abadie and Yaron Singer for bringing to our attention a counter-example
to that claim.
Subsequent to becoming aware of the counter-example, we have shown that the
objective function is in fact NP-hard to approximate to within a factor of
for any .
In an attempt to fix the record, the present article combines the problem
motivation, models, and experimental results sections from the original
incorrect article with the new hardness result. We would like readers to only
cite and use this version (which will remain an unpublished note) instead of
the incorrect conference version.Comment: Erratum of Paper "Stability of Influence Maximization" which was
presented and published in the KDD1
Bond percolation on isoradial graphs: criticality and universality
In an investigation of percolation on isoradial graphs, we prove the
criticality of canonical bond percolation on isoradial embeddings of planar
graphs, thus extending celebrated earlier results for homogeneous and
inhomogeneous square, triangular, and other lattices. This is achieved via the
star-triangle transformation, by transporting the box-crossing property across
the family of isoradial graphs. As a consequence, we obtain the universality of
these models at the critical point, in the sense that the one-arm and
2j-alternating-arm critical exponents (and therefore also the connectivity and
volume exponents) are constant across the family of such percolation processes.
The isoradial graphs in question are those that satisfy certain weak conditions
on their embedding and on their track system. This class of graphs includes,
for example, isoradial embeddings of periodic graphs, and graphs derived from
rhombic Penrose tilings.Comment: In v2: extended title, and small changes in the tex
Partially asymmetric exclusion models with quenched disorder
We consider the one-dimensional partially asymmetric exclusion process with
random hopping rates, in which a fraction of particles (or sites) have a
preferential jumping direction against the global drift. In this case the
accumulated distance traveled by the particles, x, scales with the time, t, as
x ~ t^{1/z}, with a dynamical exponent z > 0. Using extreme value statistics
and an asymptotically exact strong disorder renormalization group method we
analytically calculate, z_{pt}, for particlewise (pt) disorder, which is argued
to be related to the dynamical exponent for sitewise (st) disorder as
z_{st}=z_{pt}/2. In the symmetric situation with zero mean drift the particle
diffusion is ultra-slow, logarithmic in time.Comment: 4 pages, 3 figure
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