1,274 research outputs found
Expressiveness of Generic Process Shape Types
Shape types are a general concept of process types which work for many
process calculi. We extend the previously published Poly* system of shape types
to support name restriction. We evaluate the expressiveness of the extended
system by showing that shape types are more expressive than an implicitly typed
pi-calculus and an explicitly typed Mobile Ambients. We demonstrate that the
extended system makes it easier to enjoy advantages of shape types which
include polymorphism, principal typings, and a type inference implementation.Comment: Submitted to Trustworthy Global Computing (TGC) 2010
Generic process shape types and the Poly* system
Shape types are a general concept of process types which allows verification of
various properties of processes from various calculi. The key property is that shape
types “look like processes”, that is, they resemble process structure and content.
PolyV, originally designed by Makholm and Wells, is a type system scheme which
can be instantiated to a shape type system for many calculi. Every PolyV instantiation
has desirable properties including subject reduction, polymorphism, the
existence of principal typings, and a type inference algorithm.
In the first part of this thesis, we fix and describe inconsistencies found in the
original PolyV system, we extend the system to support name restriction, and we
provide a detailed proof of the correctness of the system.
In the second part, we present a description of the type inference algorithm which
we use to constructively prove the existence of principal typings.
In the third part, we present various applications of shape types which demonstrate
their advantages. Furthermore we prove that shape types can provide the
same expressive power as and also strictly superior expressive power than predicates
of three quite dissimilar analysis systems from the literature, namely, (1) an
implicitly typed π-calculus, (2) an explicitly typed Mobile Ambients, (3) and a flow
analysis system for BioAmbients.Engineering and Physical Sciences Research Council (EPSRC) EP/C013573/
Shape Types for Labeling Natural Polygon Features with Maplex
The article presents information on a methodology used for describing natural polygons, which enables feature label placement rules to be derived for Maplex. Maplex is a cartographic label placement extension for ArcGIS, the complete Geographic Information Systems (GIS). In cartographic label placement one need to find the shape of the polygon and how large the polygon is within the context of the space required to place text. The methodology being is the polygon\u27s minimum bounding rectangle (MBR). MBRs have also been used for automated text placement algorithms. This method could prove to be very effective in labeling soil type, vegetation type, and surface geology type
Исследование форм, видов и условий построения системы экологического страхования
Досліджено форми, види, правила компенсації екологічних ризиків для формування системи екологічного страхування, яка забезпечує мотивацію підприємств - потенційних забруднювачів до зниження екологічних ризиків.The shape, types, rules of compensation for environmental risks for the formation of an environmental insurance, which provides motivation for enterprises - potential polluters to reduce environmental risks
Dendritic Spine Shape Analysis: A Clustering Perspective
Functional properties of neurons are strongly coupled with their morphology.
Changes in neuronal activity alter morphological characteristics of dendritic
spines. First step towards understanding the structure-function relationship is
to group spines into main spine classes reported in the literature. Shape
analysis of dendritic spines can help neuroscientists understand the underlying
relationships. Due to unavailability of reliable automated tools, this analysis
is currently performed manually which is a time-intensive and subjective task.
Several studies on spine shape classification have been reported in the
literature, however, there is an on-going debate on whether distinct spine
shape classes exist or whether spines should be modeled through a continuum of
shape variations. Another challenge is the subjectivity and bias that is
introduced due to the supervised nature of classification approaches. In this
paper, we aim to address these issues by presenting a clustering perspective.
In this context, clustering may serve both confirmation of known patterns and
discovery of new ones. We perform cluster analysis on two-photon microscopic
images of spines using morphological, shape, and appearance based features and
gain insights into the spine shape analysis problem. We use histogram of
oriented gradients (HOG), disjunctive normal shape models (DNSM), morphological
features, and intensity profile based features for cluster analysis. We use
x-means to perform cluster analysis that selects the number of clusters
automatically using the Bayesian information criterion (BIC). For all features,
this analysis produces 4 clusters and we observe the formation of at least one
cluster consisting of spines which are difficult to be assigned to a known
class. This observation supports the argument of intermediate shape types.Comment: Accepted for BioImageComputing workshop at ECCV 201
Anomalous couplings in Higgs-boson pair production at approximate NNLO QCD
We combine NLO predictions with full top-quark mass dependence with approximate NNLO predictions for Higgs-boson pair production in gluon fusion, including the possibility to vary coupling parameters within a non-linear Effective Field Theory framework containing five anomalous couplings for this process. We study the impact of the anomalous couplings on various observables, and present Higgs-pair invariant-mass distributions at seven benchmark points characterising different m shape types. We also provide numerical coefficients for the approximate NNLO cross section as a function of the anomalous couplings at = 14 TeV
Data mining Mandarin tone contour shapes
In spontaneous speech, Mandarin tones that belong to the same tone category
may exhibit many different contour shapes. We explore the use of data mining
and NLP techniques for understanding the variability of tones in a large corpus
of Mandarin newscast speech. First, we adapt a graph-based approach to
characterize the clusters (fuzzy types) of tone contour shapes observed in each
tone n-gram category. Second, we show correlations between these realized
contour shape types and a bag of automatically extracted linguistic features.
We discuss the implications of the current study within the context of
phonological and information theory
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