Tools
Sorted by:
Try your query at:
 |
 |
 |
 |
 |
 |
Results 1 - 10
of
161
A Hidden Markov Model approach to variation among sites in rate of evolution.
- Mol Biol Evol
, 1996
"... Abstract The method of hidden Markov models is used to allow for unequal and unknown evolutionary rates at different sites in molecular sequences. Rates of evolution at different sites are assumed to be drawn from a set of possible rates, with a finite number of possibilities. The overall likelihoo ..."
Abstract
-
Cited by 244 (1 self)
- Add to MetaCart
it does not require us to know the rates at individual sites. However it does not allow for correlation of rates at non-adjacent sites, nor does it allow for a continuous distribution of rates over sites. It is shown how to use the Newton-Raphson method to estimate branch lengths of a phylogeny
BIOGRAPHICAL SKETCH Susan Jenson is a Senior Applications Scientist at the U.S. Geological Survey's EROS Data Center in Sioux Falls,
"... Digital elevation model (DEM) data in a raster format can be used to automatically derive the drainage character istics of an area. A procedure has been designed that is capable of operating on matrices of elevation data having no algorithmically imposed size limit, while performing within the resol ..."
Abstract
- Add to MetaCart
the resolution and accuracy tolerances of the DEM data. Each cell is processed as the center of a 3- by 3-cell spatial window in the raster elevation data. If a cell is a local minimum in comparison with two of its non-adjacent neighbors, it is labeled as a drainage cell. The linkages of the drainage cells
Sequences of integers with missing quotients and dense points without neighbors
- Discrete Math
"... Let A be a pre-defined set of rational numbers. We say a set of natural numbers S is an A-quotient-free set if no ratio of two elements in S belongs to A. We find the maximal asymptotic density and the maximal upper asymptotic density of A-quotient-free sets when A belongs to a particular class. It ..."
Abstract
-
Cited by 1 (0 self)
- Add to MetaCart
. It is known that in the case A = {p, q}, where p, q are coprime integers greater than one, the latest problem is reduced to evaluation of the largest number of lattice non-adjacent points in a triangle whose legs lie on coordinate axis. We prove that this number is achieved by choosing points of the same
Accounting for Neighboring E¤ects in Measures of Spatial Concentration1
, 2009
"... the paper. A common problem with spatial economic concentration measures (e.g. Gini, Her ndhal, entropy and Ellison-Glaeser indices) is accounting for the position of regions in space. While they purport to measure spatial clustering, these statistics are con
ned to calculations within individual ar ..."
Abstract
- Add to MetaCart
spatial units is treated in exactly the same way as activity in far-ung, non-adjacent areas. This paper shows how some popular measures of spatial concentration re-lying on areal data can be modi
ed to account for neighboring e¤ects and spatial autocorrelation. With a U.S. application, we also show
EXPLICIT UNIQUE-NEIGHBOR EXPANDERS (Extended Abstract)
"... We present a simple, explicit construction of an infinite family F of bounded-degree ’unique-neighbor’ expanders Γ; i.e., there are strictly positive constants α and ɛ, such that all Γ = (X, E(Γ)) ∈ F satisfy the following property. For each subset S of X with no more than α|X | vertices, there are ..."
Abstract
- Add to MetaCart
, there are at least ɛ|S | vertices in X \ S that are adjacent in Γ to exactly one vertex in S. The construction of F is simple to specify, and each Γ ∈ F is 6-regular. We then extend the technique and present easy to describe explicit infinite families of 4-regular and 3-regular unique-neighbor expanders, as well
Local Consistency Constrained Adaptive Neighbor Embedding for Text Image Super-Resolution
"... Abstract—This paper proposes a robust single-image super-resolution method for enlarging low quality camera captured text image. The contribution of this work is twofold. First, we point out the non-local reconstruction problem in neighbor embedding based super-resolution by statistical analysis on ..."
Abstract
- Add to MetaCart
Abstract—This paper proposes a robust single-image super-resolution method for enlarging low quality camera captured text image. The contribution of this work is twofold. First, we point out the non-local reconstruction problem in neighbor embedding based super-resolution by statistical analysis
M.: Hop Chains: Secure Routing and the Establishment of Distinct Identities
- In: Proc. 10th Intl. Conf. on Principles of Distributed Systems
, 2006
"... Abstract. We present a secure routing protocol that is immune to Sybil attacks, and that can tolerate initial collusion of Byzantine routers, or runtime collusion of non-adjacent Byzantine routers in the absence of collusion between adjacent routers. For these settings, the calculated distance from ..."
Abstract
-
Cited by 5 (0 self)
- Add to MetaCart
Abstract. We present a secure routing protocol that is immune to Sybil attacks, and that can tolerate initial collusion of Byzantine routers, or runtime collusion of non-adjacent Byzantine routers in the absence of collusion between adjacent routers. For these settings, the calculated distance from
The Effect of Interaction Between Neighboring Asperity Contacts on Wear Mode Transition in Sliding Contact of Rough Surfaces
"... ABSTRACT Concerning the final aim, that is to make clear the mechanism of the wear mode transition from mild to severe belong to the increase of contact pressure in adhesive wear, estimation of the yielding condition in subsurface under contact boundary between rough surfaces was attempted in this ..."
Abstract
- Add to MetaCart
. The results showed that the effect of the interaction between adjacent contacts and existence of relative slip motion give significant factors to the yielding state, on the other hand, the height difference between neighboring asperities affects little the determination of the yielding region. INTRODUCTION
Analyzing Kleinberg’s (and other) small-world models
- in Proc. of ACM Symp. on Princ. of Dist. Comp. (PODC
, 2004
"... We analyze the properties of Small-World networks, where links are much more likely to connect “neighbor nodes ” than distant nodes. In particular, our analysis provides new results for Kleinberg’s Small-World model and its extensions. Kleinberg adds a number of directed long-range random links to a ..."
Abstract
-
Cited by 70 (8 self)
- Add to MetaCart
to an n × n lattice network (vertices as nodes of a grid, undirected edges between any two adjacent nodes). Links have a non-uniform distribution that favors arcs to close nodes over more distant ones. He shows that the following phenomenon occurs: between any two nodes a path with expected length O(log 2
The Natural Element Method In Solid Mechanics
, 1998
"... The application of the Natural Element Method (NEM) (Traversoni, 1994; Braun and Sambridge, 1995) to boundary value problems in two-dimensional small displacement elastostatics is presented. The discrete model of the domain \Omega consists of a set of distinct nodes N , and a polygonal descripti ..."
Abstract
-
Cited by 62 (14 self)
- Add to MetaCart
. The NEM interpolant is strictly linear between adjacent nodes on the boundary of the convex hull, which facilitates imposition of essential boundary conditions. A methodology to model material discontinuities and non-convex bodies (cracks) using NEM is also described.
Results 1 - 10
of
161
