622,488 research outputs found
Transmuted Lindley-Geometric Distribution and its applications
A functional composition of the cumulative distribution function of one
probability distribution with the inverse cumulative distribution function of
another is called the transmutation map. In this article, we will use the
quadratic rank transmutation map (QRTM) in order to generate a flexible family
of probability distributions taking Lindley geometric distribution as the base
value distribution by introducing a new parameter that would offer more
distributional flexibility. It will be shown that the analytical results are
applicable to model real world data.Comment: 20 pages, 6 figures. arXiv admin note: substantial text overlap with
arXiv:1309.326
Dimensionality Reduction Methods for the Functional Map of the World Dataset
Algoritmy redukce dimenze jsou skvělé pro hlubší pochopení datového souboru. V posledních letech jsme viděli růst algoritmů pro výběr prvků, konkrétně podtřídy sousedních grafů. V této práci jsme se zaměřili na nejmodernější algoritmus UMAP a aplikovali jsme na nejmodernější datový soubor fMoW. Poté porovnáme výsledky UMAP se starší konkurenční metodou t-SNE. Podíváme se na silné a slabé stránky obou metod a možné obtíže při aplikaci na komplexní datový soubor fMoW. Na základě těchto výsledků implementujeme a školíme neuronovou síť EfficientNet na datovém souboru fMoW.Dimensionality reduction algorithms are great for a deeper understanding of the dataset. In recent years we saw grow of feature selection algorithms more specifically subclass of neighbor graphs. In this work, we focused on the state of the art algorithm UMAP and applicated for the state of the art fMoW dataset. We then compare UMAP results, with older competing method t-SNE. We look at there strengths and weaknesses of both methods and possible difficulties in the application on the complex fMoW dataset. Based on these results, we implement and trained EfficientNet neural network on the fMoW dataset
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A DSL For Logistics Clouds
Cloud is a new area of specialization in the computing world, and, as such, it has not been explicitly addressed by traditional programming languages and environments. Therefore, there is a need to create Domain Specific Languages (DSLs) for it. This paper presents such a DSL that targets logistics clouds, i.e. networked resources and systems of logistics organisations. The DSL is implemented on top of the functional concurrent language Erlang and its distributed data management system Mnesia. The paper presents features of the DSL that implement commonly occurring use cases in the logistics cloud such as message exchange, document sharing and notifications. We show how program features in this DSL map to the underlying Erlang/OTP runtime
Robust spatial memory maps encoded in networks with transient connections
The spiking activity of principal cells in mammalian hippocampus encodes an
internalized neuronal representation of the ambient space---a cognitive map.
Once learned, such a map enables the animal to navigate a given environment for
a long period. However, the neuronal substrate that produces this map remains
transient: the synaptic connections in the hippocampus and in the downstream
neuronal networks never cease to form and to deteriorate at a rapid rate. How
can the brain maintain a robust, reliable representation of space using a
network that constantly changes its architecture? Here, we demonstrate, using
novel Algebraic Topology techniques, that cognitive map's stability is a
generic, emergent phenomenon. The model allows evaluating the effect produced
by specific physiological parameters, e.g., the distribution of connections'
decay times, on the properties of the cognitive map as a whole. It also points
out that spatial memory deterioration caused by weakening or excessive loss of
the synaptic connections may be compensated by simulating the neuronal
activity. Lastly, the model explicates functional importance of the
complementary learning systems for processing spatial information at different
levels of spatiotemporal granularity, by establishing three complementary
timescales at which spatial information unfolds. Thus, the model provides a
principal insight into how can the brain develop a reliable representation of
the world, learn and retain memories despite complex plasticity of the
underlying networks and allows studying how instabilities and memory
deterioration mechanisms may affect learning process.Comment: 24 pages, 10 figures, 4 supplementary figure
Focusing on the Big Picture: Insights into a Systems Approach to Deep Learning for Satellite Imagery
Deep learning tasks are often complicated and require a variety of components
working together efficiently to perform well. Due to the often large scale of
these tasks, there is a necessity to iterate quickly in order to attempt a
variety of methods and to find and fix bugs. While participating in IARPA's
Functional Map of the World challenge, we identified challenges along the
entire deep learning pipeline and found various solutions to these challenges.
In this paper, we present the performance, engineering, and deep learning
considerations with processing and modeling data, as well as underlying
infrastructure considerations that support large-scale deep learning tasks. We
also discuss insights and observations with regard to satellite imagery and
deep learning for image classification.Comment: Accepted to IEEE Big Data 201
Functional Capacity Assessed by the Map Task in Individuals at Clinical High-Risk for Psychosis
Recent studies have recognized that signs of functional disability in schizophrenia are evident in early phases of the disorder, and, as a result, can potentially serve as vulnerability markers of future illness. However, functional measures in the psychosis prodrome have focused exclusively on real-world achievements, rather than on the skills required to carry-out a particular real-world function (ie, capacity). Despite growing evidence that diminished capacity is critical to the etiology of the established disorder, virtually no attention has been directed towards assessing functional capacity in the pre-illness stages. In the present study, we introduce the Map task, a measure to assess functional capacity in adolescent and young-adult high-risk populations
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