id stringlengths 9 16 | title stringlengths 4 278 | categories listlengths 1 13 | abstract stringlengths 3 4.08k | filtered_category_membership dict |
|---|---|---|---|---|
1105.1733 | Linear Hybrid System Falsification With Descent | [
"cs.SY",
"math.OC"
] | In this paper, we address the problem of local search for the falsification of hybrid automata with affine dynamics. Namely, if we are given a sequence of locations and a maximum simulation time, we return the trajectory that comes the closest to the unsafe set. In order to solve this problem, we formulate it as a diff... | {
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1105.1745 | Analysis of Alternative Metrics for the PAPR Problem in OFDM
Transmission | [
"cs.IT",
"math.IT"
] | The effective PAPR of the transmit signal is the standard metric to capture the effect of nonlinear distortion in OFDM transmission. A common rule of thumb is the log$(N)$ barrier where $N$ is the number of subcarriers which has been theoretically analyzed by many authors. Recently, new alternative metrics have been pr... | {
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1105.1749 | A Real-Time Model-Based Reinforcement Learning Architecture for Robot
Control | [
"cs.AI",
"cs.RO",
"cs.SE"
] | Reinforcement Learning (RL) is a method for learning decision-making tasks that could enable robots to learn and adapt to their situation on-line. For an RL algorithm to be practical for robotic control tasks, it must learn in very few actions, while continually taking those actions in real-time. Existing model-based R... | {
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1105.1767 | A projected gradient dynamical system modeling the dynamics of
bargaining | [
"q-fin.TR",
"cs.SY",
"math.DS",
"math.OC"
] | We propose a projected gradient dynamical system as a model for a bargaining scheme for an asset for which the two interested agents have personal valuations which do not initially coincide. The personal valuations are formed using subjective beliefs concerning the future states of the world and the reservation prices ... | {
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1105.1822 | On the Preliminary Design of Multiple Gravity-Assist Trajectories | [
"math.OC",
"cs.NE",
"cs.SY",
"physics.space-ph"
] | In this paper the preliminary design of multiple gravity-assist trajectories is formulated as a global optimization problem. An analysis of the structure of the solution space reveals a strong multimodality, which is strictly dependent on the complexity of the model. On the other hand it is shown how an oversimplificat... | {
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1105.1823 | Design of Low-Thrust Gravity Assist Trajectories to Europa | [
"math.OC",
"cs.SY"
] | This paper presents the design of a mission to Europa using solar electric propulsion as main source of thrust. A direct transcription method based on Finite Elements in Time was used for the design and optimisation of the entire low-thrust gravity assist transfer from the Earth to Europa. Prior to that, a global searc... | {
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1105.1829 | Optimizing low-thrust and gravity assist maneuvers to design
interplanetary trajectories | [
"math.OC",
"cs.SY"
] | In this paper a direct method based on a transcription by finite elements in time has been used to design optimal interplanetary trajectories, exploiting a combination of gravity assist maneuvers and low-thrust propulsion. A multiphase parametric approach has been used to introduce swing-bys, treated as coast phases be... | {
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1105.1853 | Feedback Message Passing for Inference in Gaussian Graphical Models | [
"stat.ML",
"cs.AI"
] | While loopy belief propagation (LBP) performs reasonably well for inference in some Gaussian graphical models with cycles, its performance is unsatisfactory for many others. In particular for some models LBP does not converge, and in general when it does converge, the computed variances are incorrect (except for cycle-... | {
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1105.1894 | Decoding Cyclic Codes up to a New Bound on the Minimum Distance | [
"cs.IT",
"math.IT"
] | A new lower bound on the minimum distance of q-ary cyclic codes is proposed. This bound improves upon the Bose-Chaudhuri-Hocquenghem (BCH) bound and, for some codes, upon the Hartmann-Tzeng (HT) bound. Several Boston bounds are special cases of our bound. For some classes of codes the bound on the minimum distance is r... | {
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1105.1901 | Convergence Analysis of Differential Evolution Variants on Unconstrained
Global Optimization Functions | [
"cs.NE"
] | In this paper, we present an empirical study on convergence nature of Differential Evolution (DE) variants to solve unconstrained global optimization problems. The aim is to identify the competitive nature of DE variants in solving the problem at their hand and compare. We have chosen fourteen benchmark functions group... | {
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1105.1917 | How citation boosts promote scientific paradigm shifts and Nobel Prizes | [
"physics.soc-ph",
"cs.DL",
"cs.SI"
] | Nobel Prizes are commonly seen to be among the most prestigious achievements of our times. Based on mining several million citations, we quantitatively analyze the processes driving paradigm shifts in science. We find that groundbreaking discoveries of Nobel Prize Laureates and other famous scientists are not only ackn... | {
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1105.1922 | Numerical Construction of LISS Lyapunov Functions under a Small Gain
Condition | [
"math.NA",
"cs.SY",
"math.OC"
] | In the stability analysis of large-scale interconnected systems it is frequently desirable to be able to determine a decay point of the gain operator, i.e., a point whose image under the monotone operator is strictly smaller than the point itself. The set of such decay points plays a crucial role in checking, in a semi... | {
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1105.1929 | The Hidden Web, XML and Semantic Web: A Scientific Data Management
Perspective | [
"cs.AI"
] | The World Wide Web no longer consists just of HTML pages. Our work sheds light on a number of trends on the Internet that go beyond simple Web pages. The hidden Web provides a wealth of data in semi-structured form, accessible through Web forms and Web services. These services, as well as numerous other applications on... | {
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1105.1930 | Emerging multidisciplinary research across database management systems | [
"cs.DB"
] | The database community is exploring more and more multidisciplinary avenues: Data semantics overlaps with ontology management; reasoning tasks venture into the domain of artificial intelligence; and data stream management and information retrieval shake hands, e.g., when processing Web click-streams. These new research... | {
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1105.1943 | Asymptotic Analysis of Double-Scattering Channels | [
"cs.IT",
"math.IT"
] | We consider a multiple-input multiple-output (MIMO) multiple access channel (MAC), where the channel between each transmitter and the receiver is modeled by the doubly-scattering channel model. Based on novel techniques from random matrix theory, we derive deterministic approximations of the mutual information, the sig... | {
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1105.1950 | An analytical framework for data stream mining techniques based on
challenges and requirements | [
"cs.DB"
] | A growing number of applications that generate massive streams of data need intelligent data processing and online analysis. Real-time surveillance systems, telecommunication systems, sensor networks and other dynamic environments are such examples. The imminent need for turning such data into useful information and kn... | {
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1105.1951 | Self-configuration from a Machine-Learning Perspective | [
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"cs.LG",
"stat.ML"
] | The goal of machine learning is to provide solutions which are trained by data or by experience coming from the environment. Many training algorithms exist and some brilliant successes were achieved. But even in structured environments for machine learning (e.g. data mining or board games), most applications beyond the... | {
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1105.1969 | Capacity of Discrete Molecular Diffusion Channels | [
"cs.IT",
"math.IT"
] | In diffusion-based molecular communications, messages can be conveyed via the variation in the concentration of molecules in the medium. In this paper, we intend to analyze the achievable capacity in transmission of information from one node to another in a diffusion channel. We observe that because of the molecular di... | {
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1105.2013 | Weyl theory and explicit solutions of direct and inverse problems for a
Dirac system with rectangular matrix potential | [
"math.SP",
"cs.SY",
"math.CA",
"math.OC"
] | A non-classical Weyl theory is developed for Dirac systems with rectangular matrix potentials. The notion of the Weyl function is introduced and the corresponding direct problem is treated. Furthermore, explicit solutions of the direct and inverse problems are obtained for the case of rational Weyl matrix functions. | {
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1105.2017 | Potential Games for Energy-Efficient Resource Allocation in
Multipoint-to-Multipoint CDMA Wireless Data Networks | [
"cs.IT",
"math.IT"
] | The problem of noncooperative resource allocation in a multipoint-to-multipoint cellular network is considered in this paper. The considered scenario is general enough to represent several key instances of modern wireless networks such as a multicellular network, a peer-to-peer network (interference channel), and a wir... | {
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1105.2054 | Generalized Boosting Algorithms for Convex Optimization | [
"cs.LG",
"stat.ML"
] | Boosting is a popular way to derive powerful learners from simpler hypothesis classes. Following previous work (Mason et al., 1999; Friedman, 2000) on general boosting frameworks, we analyze gradient-based descent algorithms for boosting with respect to any convex objective and introduce a new measure of weak learner p... | {
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1105.2062 | Scalar Quantization with Random Thresholds | [
"cs.IT",
"math.IT"
] | The distortion-rate performance of certain randomly-designed scalar quantizers is determined. The central results are the mean-squared error distortion and output entropy for quantizing a uniform random variable with thresholds drawn independently from a uniform distribution. The distortion is at most 6 times that of a... | {
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1105.2096 | Sum Capacity of Gaussian Interfering Multiple Access Channels in the Low
Interference Regime | [
"cs.IT",
"math.IT"
] | This paper has been withdrawn due to an incorrect proof. | {
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1105.2114 | An algebraic look into MAC-DMT of lattice space-time codes | [
"cs.IT",
"math.IT",
"math.NT"
] | In this paper we are concentrating on the diversity-multiplexing gain trade-off (DMT) of some space-time lattice codes. First we give a DMT bound for lattice codes having restricted dimension. We then recover the well known results of the DMT of algebraic number field codes and the Alamouti code by using the union boun... | {
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1105.2176 | A Framework for Optimization under Limited Information | [
"math.OC",
"cs.IT",
"cs.LG",
"cs.SY",
"math.IT"
] | In many real world problems, optimization decisions have to be made with limited information. The decision maker may have no a priori or posteriori data about the often nonconvex objective function except from on a limited number of points that are obtained over time through costly observations. This paper presents an ... | {
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1105.2211 | Dual Control with Active Learning using Gaussian Process Regression | [
"math.OC",
"cs.IT",
"cs.LG",
"cs.SY",
"math.IT"
] | In many real world problems, control decisions have to be made with limited information. The controller may have no a priori (or even posteriori) data on the nonlinear system, except from a limited number of points that are obtained over time. This is either due to high cost of observation or the highly non-stationary ... | {
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1105.2214 | An improved mathematical model of social group competition | [
"physics.soc-ph",
"cs.SI"
] | An improved mathematical model of social group competition is proposed. The utility obtained by a member of a certain group from each other member is assumed to be group size-dependent. Obtained results are close to available census data. It is shown that a significant fraction of population can be affiliated in a grou... | {
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1105.2254 | Symmetries in observer design: review of some recent results and
applications to EKF-based SLAM | [
"math.OC",
"cs.RO",
"cs.SY"
] | In this paper, we first review the theory of symmetry-preserving observers and we mention some recent results. Then, we apply the theory to Extended Kalman Filter-based Simultaneous Localization and Mapping (EKF SLAM). It allows to derive a new (symmetry-preserving) Extended Kalman Filter for the non-linear SLAM proble... | {
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1105.2255 | On the Limitations of Provenance for Queries With Difference | [
"cs.DB"
] | The annotation of the results of database transformations was shown to be very effective for various applications. Until recently, most works in this context focused on positive query languages. The provenance semirings is a particular approach that was proven effective for these languages, and it was shown that when p... | {
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1105.2257 | From brain to earth and climate systems: Small-world interaction
networks or not? | [
"physics.data-an",
"cs.SI",
"physics.soc-ph"
] | We consider recent reports on small-world topologies of interaction networks derived from the dynamics of spatially extended systems that are investigated in diverse scientific fields such as neurosciences, geophysics, or meteorology. With numerical simulations that mimic typical experimental situations we have identif... | {
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1105.2264 | Distributed Semantic Web Data Management in HBase and MySQL Cluster | [
"cs.DB",
"cs.PF"
] | Various computing and data resources on the Web are being enhanced with machine-interpretable semantic descriptions to facilitate better search, discovery and integration. This interconnected metadata constitutes the Semantic Web, whose volume can potentially grow the scale of the Web. Efficient management of Semantic ... | {
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1105.2274 | Data-Distributed Weighted Majority and Online Mirror Descent | [
"cs.LG",
"cs.DC"
] | In this paper, we focus on the question of the extent to which online learning can benefit from distributed computing. We focus on the setting in which $N$ agents online-learn cooperatively, where each agent only has access to its own data. We propose a generic data-distributed online learning meta-algorithm. We then i... | {
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1105.2283 | The Deterministic Sum Capacity of a Multiple Access Channel Interfering
with a Point to Point Link | [
"cs.IT",
"math.IT"
] | In this paper, we use the linear deterministic approximation model to study a two user multiple access channel mutually interfering with a point to point link, which represents a basic setup of a cellular system. We derive outer bounds on the achievable sum rate and construct coding schemes achieving the outer bounds. ... | {
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1105.2291 | Proof of a Conjecture of Helleseth: Maximal Linear Recursive Sequences
of Period $2^{2^n}-1$ Never Have Three-Valued Cross-Correlation | [
"math.CO",
"cs.IT",
"math.IT"
] | We prove a conjecture of Helleseth that claims that for any $n \geq 0$, a pair of binary maximal linear sequences of period $2^{2^n}-1$ can not have a three-valued cross-correlation function. | {
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1105.2311 | An Achievable Rate Region for the Broadcast Channel with Feedback | [
"cs.IT",
"math.IT"
] | A single-letter achievable rate region is proposed for the two-receiver discrete memoryless broadcast channel with generalized feedback. The coding strategy involves block-Markov superposition coding, using Marton's coding scheme for the broadcast channel without feedback as the starting point. If the message rates in ... | {
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1105.2361 | A standard form for generator matrices with respect to the
Niederreiter-Rosenbloom-Tsfasman metric | [
"cs.IT",
"math.IT",
"math.NT"
] | In this note, we present an analogue for codes in vector spaces with a Rosenbloom-Tsfasman metric of the well-known standard form of generator matrices for codes in spaces with the Hamming metric. | {
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1105.2375 | On the DMT of TDD-SIMO Systems with Channel-Dependent Reverse Channel
Training | [
"cs.IT",
"math.IT"
] | This paper investigates the Diversity-Multiplexing gain Trade-off (DMT) of a training based reciprocal Single Input Multiple Output (SIMO) system, with (i) perfect Channel State Information (CSI) at the Receiver (CSIR) and noisy CSI at the Transmitter (CSIT), and (ii) noisy CSIR and noisy CSIT. In both the cases, the C... | {
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1105.2377 | Entropy rate calculations of algebraic measures | [
"cs.IT",
"math.IT"
] | Let $K = \{0,1,...,q-1\}$. We use a special class of translation invariant measures on $K^\mathbb{Z}$ called algebraic measures to study the entropy rate of a hidden Markov processes. Under some irreducibility assumptions of the Markov transition matrix we derive exact formulas for the entropy rate of a general $q$ sta... | {
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1105.2416 | PAC-Bayesian Analysis of Martingales and Multiarmed Bandits | [
"cs.LG",
"stat.ML"
] | We present two alternative ways to apply PAC-Bayesian analysis to sequences of dependent random variables. The first is based on a new lemma that enables to bound expectations of convex functions of certain dependent random variables by expectations of the same functions of independent Bernoulli random variables. This ... | {
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1105.2422 | Joint Network and LDPC Coding for Bi-directional Relaying | [
"cs.IT",
"math.IT"
] | In this paper, we consider joint network and LDPC coding for practically implementing the denosie-and-forward protocol over bi-directional relaying. the closed-form expressions for computing the log-likelihood ratios of the network-coded codewords have been derived for both real and complex multiple-access channels. It... | {
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1105.2434 | Diffusion in Social Networks with Competing Products | [
"cs.SI",
"cs.DS",
"physics.soc-ph"
] | We introduce a new threshold model of social networks, in which the nodes influenced by their neighbours can adopt one out of several alternatives. We characterize the graphs for which adoption of a product by the whole network is possible (respectively necessary) and the ones for which a unique outcome is guaranteed. ... | {
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1105.2441 | Science Models as Value-Added Services for Scholarly Information Systems | [
"cs.DL",
"cs.IR"
] | The paper introduces scholarly Information Retrieval (IR) as a further dimension that should be considered in the science modeling debate. The IR use case is seen as a validation model of the adequacy of science models in representing and predicting structure and dynamics in science. Particular conceptualizations of sc... | {
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1105.2443 | Comparing webometric with web-independent rankings: a case study with
German universities | [
"cs.SI",
"cs.DL",
"physics.soc-ph"
] | In this paper we examine if hyperlink-based (webometric) indicators can be used to rank academic websites. Therefore we analyzed the interlinking structure of German university websites and compared our simple hyperlink-based ranking with official and web-independent rankings of universities. We found that link impact ... | {
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1105.2447 | LUNES: Agent-based Simulation of P2P Systems (Extended Version) | [
"cs.DC",
"cs.MA",
"cs.NI"
] | We present LUNES, an agent-based Large Unstructured NEtwork Simulator, which allows to simulate complex networks composed of a high number of nodes. LUNES is modular, since it splits the three phases of network topology creation, protocol simulation and performance evaluation. This permits to easily integrate external ... | {
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1105.2459 | Deciphering Network Community Structure by Surprise | [
"q-bio.MN",
"cs.SI",
"physics.soc-ph"
] | The analysis of complex networks permeates all sciences, from biology to sociology. A fundamental, unsolved problem is how to characterize the community structure of a network. Here, using both standard and novel benchmarks, we show that maximization of a simple global parameter, which we call Surprise (S), leads to a ... | {
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1105.2461 | Optimal grid exploration by asynchronous oblivious robots | [
"cs.DC",
"cs.DM",
"cs.NI",
"cs.RO"
] | We consider a team of {\em autonomous weak robots} that are endowed with visibility sensors and motion actuators. Autonomous means that the team cannot rely on any kind of central coordination mechanism or scheduler. By weak we mean that the robots are devoid of (1) any (observable) IDs allowing to differentiate them (... | {
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1105.2470 | The game of go as a complex network | [
"cs.GT",
"cond-mat.stat-mech",
"cs.SI",
"physics.soc-ph"
] | We study the game of go from a complex network perspective. We construct a directed network using a suitable definition of tactical moves including local patterns, and study this network for different datasets of professional tournaments and amateur games. The move distribution follows Zipf's law and the network is sca... | {
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1105.2491 | A Multiple Component Matching Framework for Person Re-Identification | [
"cs.CV"
] | Person re-identification consists in recognizing an individual that has already been observed over a network of cameras. It is a novel and challenging research topic in computer vision, for which no reference framework exists yet. Despite this, previous works share similar representations of human body based on part de... | {
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1105.2526 | Deconvolution of mixing time series on a graph | [
"stat.ME",
"cs.SI"
] | In many applications we are interested in making inference on latent time series from indirect measurements, which are often low-dimensional projections resulting from mixing or aggregation. Positron emission tomography, super-resolution, and network traffic monitoring are some examples. Inference in such settings requ... | {
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1105.2541 | Rearranging trees for robust consensus | [
"math.OC",
"cs.SY"
] | In this paper, we use the H2 norm associated with a communication graph to characterize the robustness of consensus to noise. In particular, we restrict our attention to trees and by systematic attention to the effect of local changes in topology, we derive a partial ordering for undirected trees according to the H2 no... | {
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1105.2550 | A Maximal Large Deviation Inequality for Sub-Gaussian Variables | [
"cs.LG"
] | In this short note we prove a maximal concentration lemma for sub-Gaussian random variables stating that for independent sub-Gaussian random variables we have \[P<(\max_{1\le i\le N}S_{i}>\epsilon>) \le\exp<(-\frac{1}{N^2}\sum_{i=1}^{N}\frac{\epsilon^{2}}{2\sigma_{i}^{2}}>), \] where $S_i$ is the sum of $i$ zero mean i... | {
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1105.2614 | Growth and Optimality in Network Evolution | [
"cond-mat.dis-nn",
"cs.SI",
"nlin.AO",
"physics.bio-ph"
] | In this paper we investigate networks whose evolution is governed by the interaction of a random assembly process and an optimization process. In the first process, new nodes are added one at a time and form connections to randomly selected old nodes. In between node additions, the network is rewired to minimize its pa... | {
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1105.2621 | A Compressed Sensing Wire-Tap Channel | [
"cs.IT",
"math.IT"
] | A multiplicative Gaussian wire-tap channel inspired by compressed sensing is studied. Lower and upper bounds on the secrecy capacity are derived, and shown to be relatively tight in the large system limit for a large class of compressed sensing matrices. Surprisingly, it is shown that the secrecy capacity of this chann... | {
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1105.2631 | On Pseudocodewords and Decision Regions of Linear Programming Decoding
of HDPC Codes | [
"cs.IT",
"math.IT"
] | In this paper we explore the decision regions of Linear Programming (LP) decoding. We compare the decision regions of an LP decoder, a Belief Propagation (BP) decoder and the optimal Maximum Likelihood (ML) decoder. We study the effect of minimal-weight pseudocodewords on LP decoding. We present global optimization as ... | {
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1105.2651 | A Note on the Entropy/Influence Conjecture | [
"math.CO",
"cs.LG"
] | The entropy/influence conjecture, raised by Friedgut and Kalai in 1996, seeks to relate two different measures of concentration of the Fourier coefficients of a Boolean function. Roughly saying, it claims that if the Fourier spectrum is "smeared out", then the Fourier coefficients are concentrated on "high" levels. In ... | {
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1105.2707 | Generalized Symmetric Divergence Measures and Metric Spaces | [
"cs.IT",
"math.IT"
] | Recently, Taneja studied two one parameter generalizations of J-divergence, Jensen-Shannon divergence and Arithmetic-Geometric divergence. These two generalizations in particular contain measures like: Hellinger discrimination, symmetric chi-square divergence, and triangular discrimination. These measures are well know... | {
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1105.2760 | Amplify-and-Forward in Wireless Relay Networks | [
"cs.IT",
"math.IT"
] | A general class of wireless relay networks with a single source-destination pair is considered. Intermediate nodes in the network employ an amplify-and-forward scheme to relay their input signals. In this case the overall input-output channel from the source via the relays to the destination effectively behaves as an i... | {
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1105.2782 | $\ell_0$ Minimization for Wavelet Frame Based Image Restoration | [
"cs.CV",
"math.FA",
"math.OC"
] | The theory of (tight) wavelet frames has been extensively studied in the past twenty years and they are currently widely used for image restoration and other image processing and analysis problems. The success of wavelet frame based models, including balanced approach and analysis based approach, is due to their capabi... | {
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1105.2783 | $p$-ary sequences with six-valued cross-correlation function: a new
decimation of Niho type | [
"cs.IT",
"cs.DM",
"math.IT"
] | For an odd prime $p$ and $n=2m$, a new decimation $d=\frac{(p^{m}-1)^{2}}{2}+1$ of Niho type of $m$-sequences is presented. Using generalized Niho's Theorem, we show that the cross-correlation function between a $p$-ary $m$-sequence of period $p^{n}-1$ and its decimated sequence by the above $d$ is at most six-valued a... | {
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1105.2786 | On the Cross-Correlation of a Ternary $m$-sequence of Period $3^{4k}-1$
and Its Decimated Sequence by $\frac{(3^{2k}+1)^{2}}{20}$ | [
"cs.IT",
"math.IT"
] | Let $d=\frac{(3^{2k}+1)^{2}}{20}$, where $k$ is an odd integer. We show that the magnitude of the cross-correlation values of a ternary $m$-sequence $\{s_{t}\}$ of period $3^{4k}-1$ and its decimated sequence $\{s_{dt}\}$ is upper bounded by $5\sqrt{3^{n}}+1$, where $n=4k$. | {
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1105.2790 | On the equivalence of Hopfield Networks and Boltzmann Machines | [
"cond-mat.dis-nn",
"cs.AI"
] | A specific type of neural network, the Restricted Boltzmann Machine (RBM), is implemented for classification and feature detection in machine learning. RBM is characterized by separate layers of visible and hidden units, which are able to learn efficiently a generative model of the observed data. We study a "hybrid" ve... | {
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1105.2795 | View subspaces for indexing and retrieval of 3D models | [
"cs.CV",
"cs.MM"
] | View-based indexing schemes for 3D object retrieval are gaining popularity since they provide good retrieval results. These schemes are coherent with the theory that humans recognize objects based on their 2D appearances. The viewbased techniques also allow users to search with various queries such as binary images, ra... | {
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1105.2796 | Salient Local 3D Features for 3D Shape Retrieval | [
"cs.CV",
"cs.MM"
] | In this paper we describe a new formulation for the 3D salient local features based on the voxel grid inspired by the Scale Invariant Feature Transform (SIFT). We use it to identify the salient keypoints (invariant points) on a 3D voxelized model and calculate invariant 3D local feature descriptors at these keypoints. ... | {
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1105.2797 | Face Recognition using 3D Facial Shape and Color Map Information:
Comparison and Combination | [
"cs.CV"
] | In this paper, we investigate the use of 3D surface geometry for face recognition and compare it to one based on color map information. The 3D surface and color map data are from the CAESAR anthropometric database. We find that the recognition performance is not very different between 3D surface and color map informati... | {
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1105.2800 | Retrieval and Clustering from a 3D Human Database based on Body and Head
Shape | [
"cs.CV",
"cs.CG"
] | In this paper, we describe a framework for similarity based retrieval and clustering from a 3D human database. Our technique is based on both body and head shape representation and the retrieval is based on similarity of both of them. The 3D human database used in our study is the CAESAR anthropometric database which c... | {
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1105.2813 | Optimal Upper and Lower Bounds for Boolean Expressions by Dissociation | [
"cs.AI",
"cs.DB",
"cs.LO"
] | This paper develops upper and lower bounds for the probability of Boolean expressions by treating multiple occurrences of variables as independent and assigning them new individual probabilities. Our technique generalizes and extends the underlying idea of a number of recent approaches which are varyingly called node s... | {
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1105.2831 | Planar Pixelations and Image Recognition | [
"math.DG",
"cs.CG",
"cs.CV"
] | Any subset of the plane can be approximated by a set of square pixels. This transition from a shape to its pixelation is rather brutal since it destroys geometric and topological information about the shape. Using a technique inspired by Morse Theory, we algorithmically produce a PL approximation of the original shape ... | {
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1105.2858 | A Reconstruction Method for Band-Limited Signals on the Hyperbolic Plane | [
"math.FA",
"cs.IT",
"math.IT"
] | A notion of band limited functions is considered in the case of the hyperbolic plane in its Poincare upper half-plane $\mathbb{H}$ realization. The concept of band-limitedness is based on the existence of the Helgason-Fourier transform on $\mathbb{H}$. An iterative algorithm is presented, which allows to reconstruct ba... | {
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1105.2864 | The Rate-Distortion Function for Product of Two Sources with
Side-Information at Decoders | [
"cs.IT",
"math.IT"
] | This paper investigates a lossy source coding problem in which two decoders can access their side-information respectively. The correlated sources are a product of two component correlated sources, and we exclusively investigate the case such that each component is degraded. We show the rate-distortion function for tha... | {
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1105.2865 | Error Correction for Index Coding with Side Information | [
"cs.IT",
"math.IT"
] | A problem of index coding with side information was first considered by Y. Birk and T. Kol (IEEE INFOCOM, 1998). In the present work, a generalization of index coding scheme, where transmitted symbols are subject to errors, is studied. Error-correcting methods for such a scheme, and their parameters, are investigated. ... | {
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1105.2868 | Semantic Vector Machines | [
"cs.LG",
"cs.AI"
] | We first present our work in machine translation, during which we used aligned sentences to train a neural network to embed n-grams of different languages into an $d$-dimensional space, such that n-grams that are the translation of each other are close with respect to some metric. Good n-grams to n-grams translation re... | {
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1105.2894 | Ant Colony Optimization and Hypergraph Covering Problems | [
"cs.NE"
] | Ant Colony Optimization (ACO) is a very popular metaheuristic for solving computationally hard combinatorial optimization problems. Runtime analysis of ACO with respect to various pseudo-boolean functions and different graph based combinatorial optimization problems has been taken up in recent years. In this paper, we ... | {
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1105.2902 | A Multi-Purpose Scenario-based Simulator for Smart House Environments | [
"cs.AI"
] | Developing smart house systems has been a great challenge for researchers and engineers in this area because of the high cost of implementation and evaluation process of these systems, while being very time consuming. Testing a designed smart house before actually building it is considered as an obstacle towards an eff... | {
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1105.2943 | Feature Selection for MAUC-Oriented Classification Systems | [
"cs.LG",
"cs.AI"
] | Feature selection is an important pre-processing step for many pattern classification tasks. Traditionally, feature selection methods are designed to obtain a feature subset that can lead to high classification accuracy. However, classification accuracy has recently been shown to be an inappropriate performance metric ... | {
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1105.2952 | Bounds on the Bayes Error Given Moments | [
"stat.ML",
"cs.IT",
"math.IT"
] | We show how to compute lower bounds for the supremum Bayes error if the class-conditional distributions must satisfy moment constraints, where the supremum is with respect to the unknown class-conditional distributions. Our approach makes use of Curto and Fialkow's solutions for the truncated moment problem. The lower ... | {
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1105.2965 | Generating Similar Graphs From Spherical Features | [
"cs.SI",
"physics.soc-ph",
"stat.AP",
"stat.ME",
"stat.ML"
] | We propose a novel model for generating graphs similar to a given example graph. Unlike standard approaches that compute features of graphs in Euclidean space, our approach obtains features on a surface of a hypersphere. We then utilize a von Mises-Fisher distribution, an exponential family distribution on the surface ... | {
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1105.2988 | Anatomy of a Bit: Information in a Time Series Observation | [
"cs.IT",
"cond-mat.stat-mech",
"math.IT",
"math.ST",
"nlin.AO",
"stat.TH"
] | Appealing to several multivariate information measures---some familiar, some new here---we analyze the information embedded in discrete-valued stochastic time series. We dissect the uncertainty of a single observation to demonstrate how the measures' asymptotic behavior sheds structural and semantic light on the genera... | {
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1105.2989 | Worst-Case Robust Distributed Power Allocation in Shared Unlicensed
Spectrum | [
"cs.IT",
"math.IT"
] | This paper considers non-cooperative and fully-distributed power-allocation for selfish transmitter-receiver pairs in shared unlicensed spectrum when normalized-interference to each receiver is uncertain. We model each uncertain parameter by the sum of its nominal (estimated) value and a bounded additive error in a con... | {
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1105.3006 | The approximate maximum-likelihood certificate | [
"cs.IT",
"math.IT"
] | A new property which relies on the linear programming (LP) decoder, the approximate maximum-likelihood certificate (AMLC), is introduced. When using the belief propagation decoder, this property is a measure of how close the decoded codeword is to the LP solution. Using upper bounding techniques, it is demonstrated tha... | {
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1105.3037 | Horizon Adaptation for Nonlinear Model Predictive Controllers with
guaranteed Degree of Suboptimality | [
"math.OC",
"cs.SY"
] | We propose adaptation strategies to modify the standard constrained model predictive controller scheme in order to guarantee a certain lower bound on the degree of suboptimality. Within this analysis, the length of the optimization horizon is the parameter we wish to adapt. We develop and prove several shortening and p... | {
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1105.3040 | The transversality conditions for infinite-horizon optimal control
problem with a free right endpoint and the stability of the adjoint variable
(in Russian) | [
"math.OC",
"cs.SY"
] | An infinite-horizon optimal control problem with a free right endpoint is considered. In this paper we proved that Lyapunov stability of the adjoint variable implying the vanishing of the adjoint variable at infinity along optimal solution. | {
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1105.3042 | Parallelizing a State Exchange Strategy for Noncooperative Distributed
NMPC | [
"math.OC",
"cs.SY",
"math.DS"
] | We consider a distributed non cooperative control setting in which systems are interconnected via state constraints. Each of these systems is governed by an agent which is responsible for exchanging information with its neighbours and computing a feedback law using a nonlinear model predictive controller to avoid viola... | {
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1105.3068 | On the Capacity of Noisy Computations | [
"cs.IT",
"math.IT"
] | This paper presents an analysis of the concept of capacity for noisy computations, i.e. algorithms implemented by unreliable computing devices (e.g. noisy Turing Machines). The capacity of a noisy computation is defined and justified by companion coding theorems. Under some constraints on the encoding process, capacity... | {
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1105.3106 | Collective stability of networks of winner-take-all circuits | [
"q-bio.NC",
"cond-mat.dis-nn",
"cs.NE"
] | The neocortex has a remarkably uniform neuronal organization, suggesting that common principles of processing are employed throughout its extent. In particular, the patterns of connectivity observed in the superficial layers of the visual cortex are consistent with the recurrent excitation and inhibitory feedback requi... | {
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1105.3107 | Learning to Place New Objects | [
"cs.RO"
] | The ability to place objects in the environment is an important skill for a personal robot. An object should not only be placed stably, but should also be placed in its preferred location/orientation. For instance, a plate is preferred to be inserted vertically into the slot of a dish-rack as compared to be placed hori... | {
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1105.3144 | Asynchronous Physical-layer Network Coding | [
"cs.IT",
"cs.NI",
"math.IT"
] | A key issue in physical-layer network coding (PNC) is how to deal with the asynchrony between signals transmitted by multiple transmitters. That is, symbols transmitted by different transmitters could arrive at the receiver with symbol misalignment as well as relative carrier-phase offset. A second important issue is h... | {
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1105.3168 | Lassoing Line Outages in the Smart Power Grid | [
"cs.SY",
"math.OC",
"stat.AP"
] | Fast and accurate unveiling of power line outages is of paramount importance not only for preventing faults that may lead to blackouts, but also for routine monitoring and control tasks of the smart grid, including state estimation and optimal power flow. Existing approaches are either challenged by the \emph{combinato... | {
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1105.3228 | The formation of share market prices under heterogeneous beliefs and
common knowledge | [
"physics.soc-ph",
"cs.SI",
"q-fin.PR"
] | Financial economic models often assume that investors know (or agree on) the fundamental value of the shares of the firm, easing the passage from the individual to the collective dimension of the financial system generated by the Share Exchange over time. Our model relaxes that heroic assumption of one unique "true val... | {
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1105.3259 | On R\'enyi and Tsallis entropies and divergences for exponential
families | [
"cs.IT",
"cs.LG",
"math.IT"
] | Many common probability distributions in statistics like the Gaussian, multinomial, Beta or Gamma distributions can be studied under the unified framework of exponential families. In this paper, we prove that both R\'enyi and Tsallis divergences of distributions belonging to the same exponential family admit a generic ... | {
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1105.3264 | Community Detection Using A Neighborhood Strength Driven Label
Propagation Algorithm | [
"cs.SI",
"physics.soc-ph"
] | Studies of community structure and evolution in large social networks require a fast and accurate algorithm for community detection. As the size of analyzed communities grows, complexity of the community detection algorithm needs to be kept close to linear. The Label Propagation Algorithm (LPA) has the benefits of near... | {
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} |
1105.3266 | Stability of Constrained Adaptive Model Predictive Control Algorithms | [
"math.OC",
"cs.SY"
] | Recently, suboptimality estimates for model predictive controllers (MPC) have been derived for the case without additional stabilizing endpoint constraints or a Lyapunov function type endpoint weight. The proposed methods yield a posteriori and a priori estimates of the degree of suboptimality with respect to the infin... | {
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} |
1105.3267 | Reducing the Prediction Horizon in NMPC: An Algorithm Based Approach | [
"math.OC",
"cs.SY",
"math.NA"
] | In order to guarantee stability, known results for MPC without additional terminal costs or endpoint constraints often require rather large prediction horizons. Still, stable behavior of closed loop solutions can often be observed even for shorter horizons. Here, we make use of the recent observation that stability can... | {
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} |
1105.3268 | Robustness of Prediction Based Delay Compensation for Nonlinear Systems | [
"math.OC",
"cs.SY"
] | Control of systems where the information between the controller, actuator, and sensor can be lost or delayed can be challenging with respect to stability and performance. One way to overcome the resulting problems is the use of prediction based compensation schemes. Instead of a single input, a sequence of (predicted) ... | {
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} |
1105.3270 | Optimal Camera Placement to measure Distances Conservativly Regarding
Static and Dynamic Obstacles | [
"cs.CV",
"cs.RO",
"math.OC"
] | In modern production facilities industrial robots and humans are supposed to interact sharing a common working area. In order to avoid collisions, the distances between objects need to be measured conservatively which can be done by a camera network. To estimate the acquired distance, unmodelled objects, e.g., an inter... | {
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"cs.SY": 0
} |
1105.3272 | Stability of Observer Based Predictive Control for Nonlinear
Sampled-data Systems | [
"math.OC",
"cs.SY",
"math.FA"
] | We propose a new model predictive control (MPC) approach which is completely based on an observer for the state system. For this, we show semiglobally practically asymptotic stability of the closed loop for an abstract observer and illustrate our results for a numerical example. | {
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} |
1105.3298 | Graphical model approximations of random finite set filters | [
"cs.SY",
"math.OC"
] | Random finite sets (RFSs) has been a fruitful area of research in recent years, yielding new approximate filters such as the probability hypothesis density (PHD), cardinalised PHD (CPHD), and multiple target multi-Bernoulli (MeMBer). These new methods have largely been based on approximations that side-step the need fo... | {
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} |
1105.3299 | Compressed Sensing with coherent tight frames via $l_q$-minimization for
$0<q\leq1$ | [
"math.NA",
"cs.IT",
"math.IT"
] | Our aim of this article is to reconstruct a signal from undersampled data in the situation that the signal is sparse in terms of a tight frame. We present a condition, which is independent of the coherence of the tight frame, to guarantee accurate recovery of signals which are sparse in the tight frame, from undersampl... | {
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} |
1105.3316 | Affinity Paths and Information Diffusion in Social Networks | [
"physics.soc-ph",
"cs.SI"
] | Widespread interest in the diffusion of information through social networks has produced a large number of Social Dynamics models. A majority of them use theoretical hypothesis to explain their diffusion mechanisms while the few empirically based ones average out their measures over many messages of different content. ... | {
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} |
1105.3326 | Xampling at the Rate of Innovation | [
"cs.IT",
"math.IT"
] | We address the problem of recovering signals from samples taken at their rate of innovation. Our only assumption is that the sampling system is such that the parameters defining the signal can be stably determined from the samples, a condition that lies at the heart of every sampling theorem. Consequently, our analysis... | {
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} |
1105.3338 | The Power Grid as a Complex Network: a Survey | [
"physics.soc-ph",
"cs.DM",
"cs.SI"
] | The statistical tools of Complex Network Analysis are of great use to understand salient properties of complex systems, may these be natural or pertaining human engineered infrastructures. One of these that is receiving growing attention for its societal relevance is that of electricity distribution. In this paper, we ... | {
"Other": 1,
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} |
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