id stringlengths 9 16 | title stringlengths 4 278 | categories listlengths 1 13 | abstract stringlengths 3 4.08k | filtered_category_membership dict |
|---|---|---|---|---|
1012.2384 | Clustering Drives Assortativity and Community Structure in Ensembles of
Networks | [
"physics.soc-ph",
"cond-mat.stat-mech",
"cs.SI"
] | Clustering, assortativity, and communities are key features of complex networks. We probe dependencies between these attributes and find that ensembles with strong clustering display both high assortativity by degree and prominent community structure, while ensembles with high assortativity are much less biased towards... | {
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1012.2405 | Quantum walks on complex networks with connection instabilities and
community structure | [
"quant-ph",
"cond-mat.dis-nn",
"cs.SI",
"physics.data-an",
"physics.soc-ph"
] | A continuous-time quantum walk is investigated on complex networks with the characteristic property of community structure, which is shared by most real-world networks. Motivated by the prospect of viable quantum networks, I focus on the effects of network instabilities in the form of broken links, and examine the resp... | {
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1012.2462 | Can Partisan Voting Lead to Truth? | [
"physics.soc-ph",
"cs.SI"
] | We study an extension of the voter model in which each agent is endowed with an innate preference for one of two states that we term as "truth" or "falsehood". Due to interactions with neighbors, an agent that innately prefers truth can be persuaded to adopt a false opinion (and thus be discordant with its innate prefe... | {
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1012.2491 | Affine Invariant, Model-Based Object Recognition Using Robust Metrics
and Bayesian Statistics | [
"cs.CV"
] | We revisit the problem of model-based object recognition for intensity images and attempt to address some of the shortcomings of existing Bayesian methods, such as unsuitable priors and the treatment of residuals with a non-robust error norm. We do so by using a refor- mulation of the Huber metric and carefully chosen ... | {
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1012.2496 | On the Implementation of GNU Prolog | [
"cs.PL",
"cs.AI"
] | GNU Prolog is a general-purpose implementation of the Prolog language, which distinguishes itself from most other systems by being, above all else, a native-code compiler which produces standalone executables which don't rely on any byte-code emulator or meta-interpreter. Other aspects which stand out include the expli... | {
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1012.2514 | Context Aware End-to-End Connectivity Management | [
"cs.LG",
"cs.NI"
] | In a dynamic heterogeneous environment, such as pervasive and ubiquitous computing, context-aware adaptation is a key concept to meet the varying requirements of different users. Connectivity is an important context source that can be utilized for optimal management of diverse networking resources. Application QoS (Qua... | {
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1012.2596 | A Unified MGF-Based Capacity Analysis of Diversity Combiners over
Generalized Fading Channels | [
"cs.IT",
"math.IT",
"math.ST",
"stat.OT",
"stat.TH"
] | Unified exact average capacity results for L-branch coherent diversity receivers including equal-gain combining (EGC) and maximal-ratio combining (MRC) are not known. This paper develops a novel generic framework for the capacity analysis of $L$-branch EGC/MRC over generalized fading channels. The framework is used to ... | {
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1012.2598 | Extended Generalized-K (EGK): A New Simple and General Model for
Composite Fading Channels | [
"cs.IT",
"math.IT",
"math.PR",
"math.ST",
"stat.TH"
] | In this paper, we introduce a generalized composite fading distribution (termed extended generalized-K (EGK)) to model the envelope and the power of the received signal in millimeter wave (60 GHz or above) and free-space optical channels. We obtain the first and the second-order statistics of the received signal envelo... | {
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1012.2599 | A Tutorial on Bayesian Optimization of Expensive Cost Functions, with
Application to Active User Modeling and Hierarchical Reinforcement Learning | [
"cs.LG"
] | We present a tutorial on Bayesian optimization, a method of finding the maximum of expensive cost functions. Bayesian optimization employs the Bayesian technique of setting a prior over the objective function and combining it with evidence to get a posterior function. This permits a utility-based selection of the next ... | {
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1012.2603 | Real-time Visual Tracking Using Sparse Representation | [
"cs.CV"
] | The $\ell_1$ tracker obtains robustness by seeking a sparse representation of the tracking object via $\ell_1$ norm minimization \cite{Xue_ICCV_09_Track}. However, the high computational complexity involved in the $ \ell_1 $ tracker restricts its further applications in real time processing scenario. Hence we propose a... | {
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1012.2606 | Modeling urban housing market dynamics: can the socio-spatial
segregation preserve some social diversity? | [
"physics.soc-ph",
"cs.SI"
] | Addressing issues of social diversity, we introduce a model of housing transactions between agents who are heterogeneous in their willingness to pay. A key assumption is that agents' preferences for a location depend on both an intrinsic attractiveness and on the social characteristics of the neighborhood. The stationa... | {
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1012.2609 | Inverse-Category-Frequency based supervised term weighting scheme for
text categorization | [
"cs.LG",
"cs.AI"
] | Term weighting schemes often dominate the performance of many classifiers, such as kNN, centroid-based classifier and SVMs. The widely used term weighting scheme in text categorization, i.e., tf.idf, is originated from information retrieval (IR) field. The intuition behind idf for text categorization seems less reasona... | {
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1012.2621 | Throughput and Latency of Acyclic Erasure Networks with Feedback in a
Finite Buffer Regime | [
"cs.IT",
"math.IT"
] | The exact Markov modeling analysis of erasure networks with finite buffers is an extremely hard problem due to the large number of states in the system. In such networks, packets are lost due to either link erasures or blocking by the full buffers. In this paper, we propose a novel method that iteratively estimates the... | {
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1012.2622 | Study of Throughput and Latency in Finite-buffer Coded Networks | [
"cs.IT",
"math.IT"
] | Exact queueing analysis of erasure networks with network coding in a finite buffer regime is an extremely hard problem due to the large number of states in the network. In such networks, packets are lost due to either link erasures or due to blocking due to full buffers. In this paper, a block-by-block random linear ne... | {
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1012.2628 | Throughput and Latency in Finite-Buffer Line Networks | [
"cs.IT",
"math.IT"
] | This work investigates the effect of finite buffer sizes on the throughput capacity and packet delay of line networks with packet erasure links that have perfect feedback. These performance measures are shown to be linked to the stationary distribution of an underlying irreducible Markov chain that models the system ex... | {
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1012.2633 | Personalized Data Set for Analysis | [
"cs.DB",
"cs.CR"
] | Data Management portfolio within an organization has seen an upsurge in initiatives for compliance, security, repurposing and storage within and outside the organization. When such initiatives are being put to practice care must be taken while granting access to data repositories for analysis and mining activities. Als... | {
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1012.2648 | Distributed XML Design | [
"cs.DB",
"cs.CC",
"cs.DC"
] | A distributed XML document is an XML document that spans several machines. We assume that a distribution design of the document tree is given, consisting of an XML kernel-document T[f1,...,fn] where some leaves are "docking points" for external resources providing XML subtrees (f1,...,fn, standing, e.g., for Web servic... | {
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1012.2661 | Categorial Minimalist Grammar | [
"cs.CL",
"math.LO"
] | We first recall some basic notions on minimalist grammars and on categorial grammars. Next we shortly introduce partially commutative linear logic, and our representation of minimalist grammars within this categorial system, the so-called categorial minimalist grammars. Thereafter we briefly present \lambda\mu-DRT (Dis... | {
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1012.2662 | Cusp points in the parameter space of RPR-2PRR parallel manipulator | [
"cs.RO"
] | This paper investigates the existence conditions of cusp points in the design parameter space of the R\underline{P}R-2P\underline{R}R parallel manipulators. Cusp points make possible non-singular assembly-mode changing motion, which can possibly increase the size of the aspect, i.e. the maximum singularity free workspa... | {
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1012.2666 | Joint space and workspace analysis of a two-DOF closed-chain manipulator | [
"cs.RO"
] | The aim of this paper is to compute of the generalized aspects, i.e. the maximal singularity-free domains in the Cartesian product of the joint space and workspace, for a planar parallel mechanism in using quadtree model and interval analysis based method. The parallel mechanisms can admit several solutions to the inve... | {
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1012.2668 | On the determination of cusp points of 3-R\underline{P}R parallel
manipulators | [
"cs.RO"
] | This paper investigates the cuspidal configurations of 3-RPR parallel manipulators that may appear on their singular surfaces in the joint space. Cusp points play an important role in the kinematic behavior of parallel manipulators since they make possible a non-singular change of assembly mode. In previous works, the ... | {
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1012.2673 | On the Role of Feedback in LT Codes | [
"cs.IT",
"math.IT"
] | This paper concerns application of feedback in LT codes. The considered type of feedback is acknowledgments, where information on which symbols have been decoded is given to the transmitter. We identify an important adaptive mechanism in standard LT codes, which is crucial to their ability to perform well under any cha... | {
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1012.2699 | Prognostic Watch of the Electric Power System | [
"cs.SI"
] | A prognostic watch of the electric power system (EPS)is framed up, which detects the threat to EPS for a day ahead according to the characteristic times for a day ahead and according to the droop for a day ahead. Therefore, a prognostic analysis of the EPS development for a day ahead is carried out. Also the power grid... | {
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1012.2713 | Phase Transitions of Plan Modification in Conformant Planning | [
"cs.AI",
"cs.CC"
] | We explore phase transitions of plan modification, which mainly focus on the conformant planning problems. By analyzing features of plan modification in conformant planning problems, quantitative results are obtained. If the number of operators is less than, almost all conformant planning problems can't be solved with ... | {
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1012.2726 | Role-based similarity in directed networks | [
"physics.soc-ph",
"cs.SI",
"nlin.AO",
"q-bio.MN"
] | The widespread relevance of increasingly complex networks requires methods to extract meaningful coarse-grained representations of such systems. For undirected graphs, standard community detection methods use criteria largely based on density of connections to provide such representations. We propose a method for group... | {
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1012.2751 | Universal communication part I: modulo additive channels | [
"cs.IT",
"math.IT"
] | Which communication rates can be attained over a channel whose output is an unknown (possibly stochastic) function of the input that may vary arbitrarily in time with no a-priori model? Following the spirit of the finite-state compressibility of a sequence, defined by Lempel and Ziv, a "capacity" is defined for such a ... | {
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1012.2774 | Modeling Social Networks with Overlapping Communities Using Hypergraphs
and Their Line Graphs | [
"cs.SI",
"physics.soc-ph"
] | We propose that hypergraphs can be used to model social networks with overlapping communities. The nodes of the hypergraphs represent the communities. The hyperlinks of the hypergraphs denote the individuals who may participate in multiple communities. The hypergraphs are not easy to analyze, however, the line graphs o... | {
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1012.2782 | Symmetry invariance for adapting biological systems | [
"cs.SY",
"math.OC",
"physics.bio-ph",
"q-bio.QM"
] | We study in this paper certain properties of the responses of dynamical systems to external inputs. The motivation arises from molecular systems biology. and, in particular, the recent discovery of an important transient property, related to Weber's law in psychophysics: "fold-change detection" in adapting systems, the... | {
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1012.2787 | Comparison of Planar Parallel Manipulator Architectures based on a
Multi-objective Design Optimization Approach | [
"cs.RO"
] | This paper deals with the comparison of planar parallel manipulator architectures based on a multi-objective design optimization approach. The manipulator architectures are compared with regard to their mass in motion and their regular workspace size, i.e., the objective functions. The optimization problem is subject t... | {
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1012.2789 | Experimental Comparison of Representation Methods and Distance Measures
for Time Series Data | [
"cs.AI"
] | The previous decade has brought a remarkable increase of the interest in applications that deal with querying and mining of time series data. Many of the research efforts in this context have focused on introducing new representation methods for dimensionality reduction or novel similarity measures for the underlying d... | {
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1012.2858 | Relational transducers for declarative networking | [
"cs.DB"
] | Motivated by a recent conjecture concerning the expressiveness of declarative networking, we propose a formal computation model for "eventually consistent" distributed querying, based on relational transducers. A tight link has been conjectured between coordination-freeness of computations, and monotonicity of the quer... | {
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1012.3005 | On the Combinatorial Multi-Armed Bandit Problem with Markovian Rewards | [
"math.OC",
"cs.LG",
"cs.NI",
"cs.SY",
"math.PR"
] | We consider a combinatorial generalization of the classical multi-armed bandit problem that is defined as follows. There is a given bipartite graph of $M$ users and $N \geq M$ resources. For each user-resource pair $(i,j)$, there is an associated state that evolves as an aperiodic irreducible finite-state Markov chain ... | {
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1012.3013 | Aspects of Multi-Dimensional Modelling of Substellar Atmospheres | [
"astro-ph.SR",
"astro-ph.EP",
"cs.CE",
"physics.ao-ph",
"physics.flu-dyn"
] | Theoretical arguments and observations suggest that the atmospheres of Brown Dwarfs and planets are very dynamic on chemical and on physical time scales. The modelling of such substellar atmospheres has, hence, been much more demanding than initially anticipated. This Splinter (http://star-www.st-and.ac.uk/~ch80/CS16/M... | {
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} |
1012.3018 | On the size of data structures used in symbolic model checking | [
"cs.AI",
"cs.CC",
"cs.DS",
"cs.LO"
] | Temporal Logic Model Checking is a verification method in which we describe a system, the model, and then we verify whether some properties, expressed in a temporal logic formula, hold in the system. It has many industrial applications. In order to improve performance, some tools allow preprocessing of the model, verif... | {
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1012.3023 | Generating constrained random graphs using multiple edge switches | [
"cs.SI",
"physics.soc-ph"
] | The generation of random graphs using edge swaps provides a reliable method to draw uniformly random samples of sets of graphs respecting some simple constraints, e.g. degree distributions. However, in general, it is not necessarily possible to access all graphs obeying some given con- straints through a classical swit... | {
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1012.3059 | Confidence Sets in Time-Series Filtering | [
"cs.IT",
"math.IT",
"math.ST",
"stat.TH"
] | The problem of filtering of finite-alphabet stationary ergodic time series is considered. A method for constructing a confidence set for the (unknown) signal is proposed, such that the resulting set has the following properties: First, it includes the unknown signal with probability $\gamma$, where $\gamma$ is a parame... | {
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1012.3098 | On the Impact of Mutation-Selection Balance on the Runtime of
Evolutionary Algorithms | [
"cs.NE",
"nlin.AO",
"q-bio.PE"
] | The interplay between mutation and selection plays a fundamental role in the behaviour of evolutionary algorithms (EAs). However, this interplay is still not completely understood. This paper presents a rigorous runtime analysis of a non-elitist population-based EA that uses the linear ranking selection mechanism. The ... | {
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1012.3148 | To study the phenomenon of the Moravec's Paradox | [
"cs.AI",
"cs.RO"
] | "Encoded in the large, highly evolved sensory and motor portions of the human brain is a billion years of experience about the nature of the world and how to survive in it. The deliberate process we call reasoning is, I believe, the thinnest veneer of human thought, effective only because it is supported by this much o... | {
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1012.3189 | Maximizing Expected Utility for Stochastic Combinatorial Optimization
Problems | [
"cs.DS",
"cs.DB"
] | We study the stochastic versions of a broad class of combinatorial problems where the weights of the elements in the input dataset are uncertain. The class of problems that we study includes shortest paths, minimum weight spanning trees, and minimum weight matchings, and other combinatorial problems like knapsack. We o... | {
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1012.3198 | Network MIMO with Linear Zero-Forcing Beamforming: Large System
Analysis, Impact of Channel Estimation and Reduced-Complexity Scheduling | [
"cs.IT",
"math.IT"
] | We consider the downlink of a multi-cell system with multi-antenna base stations and single-antenna user terminals, arbitrary base station cooperation clusters, distance-dependent propagation pathloss, and general "fairness" requirements. Base stations in the same cooperation cluster employ joint transmission with line... | {
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1012.3201 | Cyclic and Quasi-Cyclic LDPC Codes on Row and Column Constrained
Parity-Check Matrices and Their Trapping Sets | [
"cs.IT",
"math.IT"
] | This paper is concerned with construction and structural analysis of both cyclic and quasi-cyclic codes, particularly LDPC codes. It consists of three parts. The first part shows that a cyclic code given by a parity-check matrix in circulant form can be decomposed into descendant cyclic and quasi-cyclic codes of variou... | {
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1012.3216 | TILT: Transform Invariant Low-rank Textures | [
"cs.CV"
] | In this paper, we show how to efficiently and effectively extract a class of "low-rank textures" in a 3D scene from 2D images despite significant corruptions and warping. The low-rank textures capture geometrically meaningful structures in an image, which encompass conventional local features such as edges and corners ... | {
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1012.3252 | A mathematical model for networks with structures in the mesoscale | [
"physics.soc-ph",
"cond-mat.stat-mech",
"cs.SI",
"math.CO"
] | The new concept of multilevel network is introduced in order to embody some topological properties of complex systems with structures in the mesoscale which are not completely captured by the classical models. This new model, which generalizes the hyper-network and hyper-structure models, fits perfectly with several re... | {
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1012.3278 | Collaborative Knowledge Creation and Management in Information Retrieval | [
"cs.IR"
] | The final goal of Information Retrieval (IR) is knowledge production. However, it has been argued that knowledge production is not an individual effort but a collaborative effort. Collaboration in information retrieval is geared towards knowledge sharing and creation of new knowledge by users. This paper discusses Coll... | {
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1012.3280 | A new Recommender system based on target tracking: a Kalman Filter
approach | [
"cs.AI"
] | In this paper, we propose a new approach for recommender systems based on target tracking by Kalman filtering. We assume that users and their seen resources are vectors in the multidimensional space of the categories of the resources. Knowing this space, we propose an algorithm based on a Kalman filter to track users a... | {
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1012.3310 | The asymptotical error of broadcast gossip averaging algorithms | [
"math.OC",
"cs.SY",
"math.PR"
] | In problems of estimation and control which involve a network, efficient distributed computation of averages is a key issue. This paper presents theoretical and simulation results about the accumulation of errors during the computation of averages by means of iterative "broadcast gossip" algorithms. Using martingale th... | {
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1012.3311 | Validating XML Documents in the Streaming Model with External Memory | [
"cs.DS",
"cs.DB"
] | We study the problem of validating XML documents of size $N$ against general DTDs in the context of streaming algorithms. The starting point of this work is a well-known space lower bound. There are XML documents and DTDs for which $p$-pass streaming algorithms require $\Omega(N/p)$ space. We show that when allowing ... | {
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1012.3312 | Dynamic Capitalization and Visualization Strategy in Collaborative
Knowledge Management System for EI Process | [
"cs.AI"
] | Knowledge is attributed to human whose problem-solving behavior is subjective and complex. In today's knowledge economy, the need to manage knowledge produced by a community of actors cannot be overemphasized. This is due to the fact that actors possess some level of tacit knowledge which is generally difficult to arti... | {
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1012.3320 | Data Conflict Resolution Using Trust Mappings | [
"cs.DB",
"cs.AI"
] | In massively collaborative projects such as scientific or community databases, users often need to agree or disagree on the content of individual data items. On the other hand, trust relationships often exist between users, allowing them to accept or reject other users' beliefs by default. As those trust relationships ... | {
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1012.3323 | On the transfer matrix of a MIMO system | [
"cs.IT",
"math-ph",
"math.IT",
"math.MP"
] | We develop a deterministic ab-initio model for the input-output relationship of a multiple-input multiple-output (MIMO) wireless channel, starting from the Maxwell equations combined with Ohm's Law. The main technical tools are scattering and geometric perturbation theories. The derived relationship can lead us to a de... | {
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1012.3336 | Dynamic Knowledge Capitalization through Annotation among Economic
Intelligence Actors in a Collaborative Environment | [
"cs.AI"
] | The shift from industrial economy to knowledge economy in today's world has revolutionalized strategic planning in organizations as well as their problem solving approaches. The point of focus today is knowledge and service production with more emphasis been laid on knowledge capital. Many organizations are investing o... | {
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1012.3359 | Curve Reconstruction in Riemannian Manifolds: Ordering Motion Frames | [
"cs.CG",
"cs.GR",
"cs.RO",
"math.DG"
] | In this article we extend the computational geometric curve reconstruction approach to curves in Riemannian manifolds. We prove that the minimal spanning tree, given a sufficiently dense sample, correctly reconstructs the smooth arcs and further closed and simple curves in Riemannian manifolds. The proof is based on th... | {
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1012.3409 | Uncovering space-independent communities in spatial networks | [
"physics.soc-ph",
"cs.SI"
] | Many complex systems are organized in the form of a network embedded in space. Important examples include the physical Internet infrastucture, road networks, flight connections, brain functional networks and social networks. The effect of space on network topology has recently come under the spotlight because of the em... | {
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1012.3410 | Descriptive-complexity based distance for fuzzy sets | [
"cs.AI"
] | A new distance function dist(A,B) for fuzzy sets A and B is introduced. It is based on the descriptive complexity, i.e., the number of bits (on average) that are needed to describe an element in the symmetric difference of the two sets. The distance gives the amount of additional information needed to describe any one ... | {
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1012.3439 | List-decoding of binary Goppa codes up to the binary Johnson bound | [
"cs.IT",
"math.IT"
] | We study the list-decoding problem of alternant codes, with the notable case of classical Goppa codes. The major consideration here is to take into account the size of the alphabet, which shows great influence on the list-decoding radius. This amounts to compare the \emph{generic} Johnson bound to the \emph{$q$-ary} Jo... | {
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} |
1012.3476 | Adaptive Parallel Tempering for Stochastic Maximum Likelihood Learning
of RBMs | [
"stat.ML",
"cs.NE"
] | Restricted Boltzmann Machines (RBM) have attracted a lot of attention of late, as one the principle building blocks of deep networks. Training RBMs remains problematic however, because of the intractibility of their partition function. The maximum likelihood gradient requires a very robust sampler which can accurately ... | {
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} |
1012.3502 | Rules of Thumb for Information Acquisition from Large and Redundant Data | [
"cs.IR",
"cs.DB",
"physics.data-an"
] | We develop an abstract model of information acquisition from redundant data. We assume a random sampling process from data which provide information with bias and are interested in the fraction of information we expect to learn as function of (i) the sampled fraction (recall) and (ii) varying bias of information (redun... | {
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1012.3506 | Local-Testability and Self-Correctability of q-ary Sparse Linear Codes | [
"cs.CC",
"cs.IT",
"math.IT"
] | We prove that q-ary sparse codes with small bias are self-correctable and locally testable. We generalize a result of Kaufman and Sudan that proves the local testability and correctability of binary sparse codes with small bias. We use properties of q-ary Krawtchouk polynomials and the McWilliams identity -that relates... | {
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} |
1012.3583 | A fast no-rejection algorithm for the Category Game | [
"physics.comp-ph",
"cs.SI",
"physics.soc-ph"
] | The Category Game is a multi-agent model that accounts for the emergence of shared categorization patterns in a population of interacting individuals. In the framework of the model, linguistic categories appear as long lived consensus states that are constantly reshaped and re-negotiated by the communicating individual... | {
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1012.3607 | Accurate prediction of gene expression by integration of DNA sequence
statistics with detailed modeling of transcription regulation | [
"q-bio.MN",
"cond-mat.stat-mech",
"cs.CE",
"physics.bio-ph",
"q-bio.SC"
] | Gene regulation involves a hierarchy of events that extend from specific protein-DNA interactions to the combinatorial assembly of nucleoprotein complexes. The effects of DNA sequence on these processes have typically been studied based either on its quantitative connection with single-domain binding free energies or o... | {
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1012.3638 | Determination of the Integrated Sidelobe Level of Sets of Rotated
Legendre Sequences | [
"cs.IT",
"math.IT"
] | Sequences sets with low aperiodic auto- and cross-correlations play an important role in many applications like communications, radar and other active sensing applications. The use of antipodal sequences reduces hardware requirements while increases the difficult of the task of signal design. In this paper we present a... | {
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1012.3646 | Minimum-Time Frictionless Atom Cooling in Harmonic Traps | [
"math.OC",
"cs.SY",
"quant-ph"
] | Frictionless atom cooling in harmonic traps is formulated as a time-optimal control problem and a synthesis of optimal controlled trajectories is obtained. | {
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1012.3651 | Cascades on a class of clustered random networks | [
"physics.soc-ph",
"cond-mat.stat-mech",
"cs.SI"
] | We present an analytical approach to determining the expected cascade size in a broad range of dynamical models on the class of random networks with arbitrary degree distribution and nonzero clustering introduced in [M.E.J. Newman, Phys. Rev. Lett. 103, 058701 (2009)]. A condition for the existence of global cascades i... | {
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1012.3656 | Adaptive Cluster Expansion (ACE): A Multilayer Network for Estimating
Probability Density Functions | [
"cs.NE",
"cs.CV"
] | We derive an adaptive hierarchical method of estimating high dimensional probability density functions. We call this method of density estimation the "adaptive cluster expansion" or ACE for short. We present an application of this approach, based on a multilayer topographic mapping network, that adaptively estimates th... | {
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1012.3697 | Analysis of Agglomerative Clustering | [
"cs.DS",
"cs.CG",
"cs.LG"
] | The diameter $k$-clustering problem is the problem of partitioning a finite subset of $\mathbb{R}^d$ into $k$ subsets called clusters such that the maximum diameter of the clusters is minimized. One early clustering algorithm that computes a hierarchy of approximate solutions to this problem (for all values of $k$) is ... | {
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1012.3705 | Stochastic Vector Quantisers | [
"cs.NE",
"cs.CV"
] | In this paper a stochastic generalisation of the standard Linde-Buzo-Gray (LBG) approach to vector quantiser (VQ) design is presented, in which the encoder is implemented as the sampling of a vector of code indices from a probability distribution derived from the input vector, and the decoder is implemented as a superp... | {
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1012.3722 | Energy stable and momentum conserving hybrid finite element method for
the incompressible Navier-Stokes equations | [
"cs.CE",
"math.NA"
] | A hybrid method for the incompressible Navier--Stokes equations is presented. The method inherits the attractive stabilizing mechanism of upwinded discontinuous Galerkin methods when momentum advection becomes significant, equal-order interpolations can be used for the velocity and pressure fields, and mass can be cons... | {
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1012.3724 | The Development of Dominance Stripes and Orientation Maps in a
Self-Organising Visual Cortex Network (VICON) | [
"cs.NE",
"cs.CV"
] | A self-organising neural network is presented that is based on a rigorous Bayesian analysis of the information contained in individual neural firing events. This leads to a visual cortex network (VICON) that has many of the properties emerge when a mammalian visual cortex is exposed to data arriving from two imaging se... | {
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1012.3788 | A New Formula for the BER of Binary Modulations with Dual-Branch
Selection over Generalized-K Composite Fading Channels | [
"cs.IT",
"math.IT",
"math.PR",
"math.ST",
"stat.TH"
] | Error performance is one of the main performance measures and derivation of its closed-form expression has proved to be quite involved for certain systems. In this letter, a unified closed-form expression, applicable to different binary modulation schemes, for the bit error rate of dual-branch selection diversity based... | {
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1012.3790 | Improving PPM Algorithm Using Dictionaries | [
"cs.IT",
"math.IT"
] | We propose a method to improve traditional character-based PPM text compression algorithms. Consider a text file as a sequence of alternating words and non-words, the basic idea of our algorithm is to encode non-words and prefixes of words using character-based context models and encode suffixes of words using dictiona... | {
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1012.3793 | A robust ranking algorithm to spamming | [
"cs.IR",
"physics.data-an"
] | Ranking problem of web-based rating system has attracted many attentions. A good ranking algorithm should be robust against spammer attack. Here we proposed a correlation based reputation algorithm to solve the ranking problem of such rating systems where user votes some objects with ratings. In this algorithm, reputat... | {
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1012.3802 | Detecting Image Forgeries using Geometric Cues | [
"cs.CV"
] | This chapter presents a framework for detecting fake regions by using various methods including watermarking technique and blind approaches. In particular, we describe current categories on blind approaches which can be divided into five: pixel-based techniques, format-based techniques, camera-based techniques, physica... | {
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1012.3805 | Element Retrieval using Namespace Based on keyword search over XML
Documents | [
"cs.IR"
] | Querying over XML elements using keyword search is steadily gaining popularity. The traditional similarity measure is widely employed in order to effectively retrieve various XML documents. A number of authors have already proposed different similarity-measure methods that take advantage of the structure and content of... | {
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1012.3853 | On the CNF encoding of cardinality constraints and beyond | [
"cs.AI",
"cs.LO"
] | In this report, we propose a quick survey of the currently known techniques for encoding a Boolean cardinality constraint into a CNF formula, and we discuss about the relevance of these encodings. We also propose models to facilitate analysis and design of CNF encodings for Boolean constraints. | {
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1012.3875 | Optimal and Robust Transmit Designs for MISO Channel Secrecy by
Semidefinite Programming | [
"cs.IT",
"math.IT"
] | In recent years there has been growing interest in study of multi-antenna transmit designs for providing secure communication over the physical layer. This paper considers the scenario of an intended multi-input single-output channel overheard by multiple multi-antenna eavesdroppers. Specifically, we address the transm... | {
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1012.3877 | Queue-Aware Dynamic Clustering and Power Allocation for Network MIMO
Systems via Distributive Stochastic Learning | [
"cs.LG"
] | In this paper, we propose a two-timescale delay-optimal dynamic clustering and power allocation design for downlink network MIMO systems. The dynamic clustering control is adaptive to the global queue state information (GQSI) only and computed at the base station controller (BSC) over a longer time scale. On the other ... | {
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1012.3947 | Interpolation in Equilibrium Logic and Answer Set Programming: the
Propositional Case | [
"cs.LO",
"cs.AI"
] | Interpolation is an important property of classical and many non classical logics that has been shown to have interesting applications in computer science and AI. Here we study the Interpolation Property for the propositional version of the non-monotonic system of equilibrium logic, establishing weaker or stronger form... | {
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1012.3951 | Diffusion-geometric maximally stable component detection in deformable
shapes | [
"cs.CV"
] | Maximally stable component detection is a very popular method for feature analysis in images, mainly due to its low computation cost and high repeatability. With the recent advance of feature-based methods in geometric shape analysis, there is significant interest in finding analogous approaches in the 3D world. In thi... | {
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1012.3953 | PhyloGrid: a development for a workflow in Phylogeny | [
"cs.CE",
"q-bio.OT"
] | In this work we present the development of a workflow based on Taverna which is going to be implemented for calculations in Phylogeny by means of the MrBayes tool. It has a friendly interface developed with the Gridsphere framework. The user is able to define the parameters for doing the Bayesian calculation, determine... | {
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1012.3956 | Advances in the Biomedical Applications of the EELA Project | [
"cs.CE",
"q-bio.OT"
] | In the last years an increasing demand for Grid Infrastructures has resulted in several international collaborations. This is the case of the EELA Project, which has brought together collaborating groups of Latin America and Europe. One year ago we presented this e-infrastructure used, among others, by the Biomedical g... | {
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1012.4046 | Artificial Intelligence in Reverse Supply Chain Management: The State of
the Art | [
"cs.AI"
] | Product take-back legislation forces manufacturers to bear the costs of collection and disposal of products that have reached the end of their useful lives. In order to reduce these costs, manufacturers can consider reuse, remanufacturing and/or recycling of components as an alternative to disposal. The implementation ... | {
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1012.4050 | Motif Analysis in the Amazon Product Co-Purchasing Network | [
"cs.SI",
"physics.soc-ph"
] | Online stores like Amazon and Ebay are growing by the day. Fewer people go to departmental stores as opposed to the convenience of purchasing from stores online. These stores may employ a number of techniques to advertise and recommend the appropriate product to the appropriate buyer profile. This article evaluates var... | {
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1012.4051 | Survey & Experiment: Towards the Learning Accuracy | [
"cs.LG"
] | To attain the best learning accuracy, people move on with difficulties and frustrations. Though one can optimize the empirical objective using a given set of samples, its generalization ability to the entire sample distribution remains questionable. Even if a fair generalization guarantee is offered, one still wants to... | {
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1012.4072 | Stochastic Control of Event-Driven Feedback in Multi-Antenna
Interference Channels | [
"cs.IT",
"math.IT"
] | Spatial interference avoidance is a simple and effective way of mitigating interference in multi-antenna wireless networks. The deployment of this technique requires channel-state information (CSI) feedback from each receiver to all interferers, resulting in substantial network overhead. To address this issue, this pap... | {
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1012.4074 | A fast divide-and-conquer algorithm for indexing human genome sequences | [
"cs.DB"
] | Since the release of human genome sequences, one of the most important research issues is about indexing the genome sequences, and the suffix tree is most widely adopted for that purpose. The traditional suffix tree construction algorithms have severe performance degradation due to the memory bottleneck problem. The re... | {
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1012.4088 | Fractal Analysis on Human Behaviors Dynamics | [
"physics.soc-ph",
"cs.SI"
] | The study of human dynamics has attracted much interest from many fields recently. In this paper, the fractal characteristic of human behaviors is investigated from the perspective of time series constructed with the amount of library loans. The Hurst exponents and length of non-periodic cycles calculated through Resca... | {
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1012.4116 | lp-Recovery of the Most Significant Subspace among Multiple Subspaces
with Outliers | [
"stat.ML",
"cs.CV",
"math.FA"
] | We assume data sampled from a mixture of d-dimensional linear subspaces with spherically symmetric distributions within each subspace and an additional outlier component with spherically symmetric distribution within the ambient space (for simplicity we may assume that all distributions are uniform on their correspondi... | {
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1012.4126 | Self-Organising Stochastic Encoders | [
"cs.NE",
"cs.CV"
] | The processing of mega-dimensional data, such as images, scales linearly with image size only if fixed size processing windows are used. It would be very useful to be able to automate the process of sizing and interconnecting the processing windows. A stochastic encoder that is an extension of the standard Linde-Buzo-G... | {
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1012.4161 | Lattice Code Design for the Rayleigh Fading Wiretap Channel | [
"cs.IT",
"math.IT"
] | It has been shown recently that coding for the Gaussian Wiretap Channel can be done with nested lattices. A fine lattice intended to the legitimate user must be designed as a usual lattice code for the Gaussian Channel, while a coarse lattice is added to introduce confusion at the eavesdropper, whose theta series must ... | {
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1012.4173 | A Self-Organising Neural Network for Processing Data from Multiple
Sensors | [
"cs.NE",
"cs.CV"
] | This paper shows how a folded Markov chain network can be applied to the problem of processing data from multiple sensors, with an emphasis on the special case of 2 sensors. It is necessary to design the network so that it can transform a high dimensional input vector into a posterior probability, for which purpose the... | {
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"cs.RO": 0,
"cs.SD": 0,
"cs.SI": 0,
"cs.SY": 0
} |
1012.4194 | Equation-Free Multiscale Computational Analysis of Individual-Based
Epidemic Dynamics on Networks | [
"math.NA",
"cs.SI",
"nlin.AO",
"physics.soc-ph"
] | The surveillance, analysis and ultimately the efficient long-term prediction and control of epidemic dynamics appear to be one of the major challenges nowadays. Detailed atomistic mathematical models play an important role towards this aim. In this work it is shown how one can exploit the Equation Free approach and opt... | {
"Other": 0,
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} |
1012.4225 | Delay and Redundancy in Lossless Source Coding | [
"cs.IT",
"math.IT"
] | The penalty incurred by imposing a finite delay constraint in lossless source coding of a memoryless source is investigated. It is well known that for the so-called block-to-variable and variable-to-variable codes, the redundancy decays at best polynomially with the delay, where in this case the delay is identified wit... | {
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} |
1012.4241 | A New Technique for Text Data Compression | [
"cs.CR",
"cs.IT",
"math.IT"
] | In this paper we use ternary representation of numbers for compressing text data. We use a binary map for ternary digits and introduce a way to use the binary 11-pair, which has never been use for coding data before, and we futher use 4-Digits ternary representation of alphabet with lowercase and uppercase with some ex... | {
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"cs.SI": 0,
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} |
1012.4249 | Travel Time Estimation Using Floating Car Data | [
"cs.LG"
] | This report explores the use of machine learning techniques to accurately predict travel times in city streets and highways using floating car data (location information of user vehicles on a road network). The aim of this report is twofold, first we present a general architecture of solving this problem, then present ... | {
"Other": 0,
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} |
1012.4250 | Differential Privacy versus Quantitative Information Flow | [
"cs.IT",
"cs.CR",
"cs.DB",
"math.IT"
] | Differential privacy is a notion of privacy that has become very popular in the database community. Roughly, the idea is that a randomized query mechanism provides sufficient privacy protection if the ratio between the probabilities of two different entries to originate a certain answer is bound by e^\epsilon. In the f... | {
"Other": 0,
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} |
1012.4290 | Bit recycling for scaling random number generators | [
"cs.IT",
"math.IT",
"math.NA",
"math.PR"
] | Many Random Number Generators (RNG) are available nowadays; they are divided in two categories, hardware RNG, that provide "true" random numbers, and algorithmic RNG, that generate pseudo random numbers (PRNG). Both types usually generate random numbers $(X_n)$ as independent uniform samples in a range $0,\cdots,2^{b-1... | {
"Other": 0,
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"cs.SD": 0,
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} |
1012.4327 | Using virtual human for an interactive customer-oriented constrained
environment design | [
"cs.RO"
] | For industrial product design, it is very important to take into account assembly/disassembly and maintenance operations during the conceptual and prototype design stage. For these operations or other similar operations in a constrained environment, trajectory planning is always a critical and difficult issue for evalu... | {
"Other": 0,
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"cs.RO": 1,
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} |
1012.4374 | R\'egularisation et optimisation pour l'imagerie sismique des fondations
de pyl\^ones | [
"cs.CE"
] | This research report summarizes the progress of work carried out jointly by the IRCCyN and the \'Ecole Polytechnique de Montr\'eal about the resolution of the inverse problem for the seismic imaging of transmission overhead line structure foundations. Several methods aimed at mapping the underground medium are consider... | {
"Other": 0,
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} |
1012.4396 | Selection in Scientific Networks | [
"cs.SI",
"cs.CY",
"cs.DL",
"nlin.AO",
"physics.soc-ph"
] | One of the most interesting scientific challenges nowadays deals with the analysis and the understanding of complex networks' dynamics. A major issue is the definition of new frameworks for the exploration of the dynamics at play in real dynamic networks. Here, we focus on scientific communities by analyzing the "socia... | {
"Other": 1,
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} |
1012.4401 | A Note on a Characterization of R\'enyi Measures and its Relation to
Composite Hypothesis Testing | [
"cs.IT",
"math.IT"
] | The R\'enyi information measures are characterized in terms of their Shannon counterparts, and properties of the former are recovered from first principle via the associated properties of the latter. Motivated by this characterization, a two-sensor composite hypothesis testing problem is presented, and the optimal wors... | {
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} |
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