id stringlengths 9 16 | title stringlengths 4 278 | categories listlengths 1 13 | abstract stringlengths 3 4.08k | filtered_category_membership dict |
|---|---|---|---|---|
0806.4648 | An Algebraic Approach for the MIMO Control of Small Scale Helicopter | [
"cs.RO"
] | The control of small-scale helicopter is a MIMO problem. To use of classical control approach to formally solve a MIMO problem, one needs to come up with multidimensional Root Locus diagram to tune the control parameters. The problem with the required dimension of the RL diagram for MIMO design has forced the design pr... | {
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0806.4650 | Structural Damage Detection Using Randomized Trained Neural Networks | [
"cs.NE"
] | A computationally method on damage detection problems in structures was conducted using neural networks. The problem that is considered in this works consists of estimating the existence, location and extent of stiffness reduction in structure which is indicated by the changes of the structural static parameters such a... | {
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0806.4652 | A Fixed-Parameter Algorithm for Random Instances of Weighted d-CNF
Satisfiability | [
"cs.DS",
"cs.AI",
"cs.CC"
] | We study random instances of the weighted $d$-CNF satisfiability problem (WEIGHTED $d$-SAT), a generic W[1]-complete problem. A random instance of the problem consists of a fixed parameter $k$ and a random $d$-CNF formula $\weicnf{n}{p}{k, d}$ generated as follows: for each subset of $d$ variables and with probability ... | {
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0806.4667 | Overlaid Cellular and Mobile Ad Hoc Networks | [
"cs.IT",
"math.IT"
] | In cellular systems using frequency division duplex, growing Internet services cause unbalance of uplink and downlink traffic, resulting in poor uplink spectrum utilization. Addressing this issue, this paper considers overlaying an ad hoc network onto a cellular uplink network for improving spectrum utilization and spa... | {
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0806.4686 | Sparse Online Learning via Truncated Gradient | [
"cs.LG",
"cs.AI"
] | We propose a general method called truncated gradient to induce sparsity in the weights of online learning algorithms with convex loss functions. This method has several essential properties: The degree of sparsity is continuous -- a parameter controls the rate of sparsification from no sparsification to total sparsifi... | {
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0806.4703 | Challenging More Updates: Towards Anonymous Re-publication of Fully
Dynamic Datasets | [
"cs.DB"
] | Most existing anonymization work has been done on static datasets, which have no update and need only one-time publication. Recent studies consider anonymizing dynamic datasets with external updates: the datasets are updated with record insertions and/or deletions. This paper addresses a new problem: anonymous re-publi... | {
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0806.4722 | Malleable Coding: Compressed Palimpsests | [
"cs.IT",
"math.IT"
] | A malleable coding scheme considers not only compression efficiency but also the ease of alteration, thus encouraging some form of recycling of an old compressed version in the formation of a new one. Malleability cost is the difficulty of synchronizing compressed versions, and malleable codes are of particular interes... | {
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0806.4737 | On the Multiplexing Gain of K-user Partially Connected Interference
Channel | [
"cs.IT",
"math.IT"
] | The multiplexing gain (MUXG) of $K$-user interference channel (IC) with partially connected interfering links is analyzed. The motivation for the partially connected IC comes from the fact that not all interferences are equally strong in practice. The MUXG is characterized as a function of the number ($K$) of users and... | {
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0806.4749 | Nested Ordered Sets and their Use for Data Modelling | [
"cs.DB"
] | In this paper we present a new approach to data modelling, called the concept-oriented model (CoM), and describe its main features and characteristics including data semantics and operations. The distinguishing feature of this model is that it is based on the formalism of nested ordered sets where any element participa... | {
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0806.4773 | Signal Codes | [
"cs.IT",
"math.IT"
] | Motivated by signal processing, we present a new class of channel codes, called signal codes, for continuous-alphabet channels. Signal codes are lattice codes whose encoding is done by convolving an integer information sequence with a fixed filter pattern. Decoding is based on the bidirectional sequential stack decoder... | {
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0806.4787 | Locality and Bounding-Box Quality of Two-Dimensional Space-Filling
Curves | [
"cs.CG",
"cs.DB"
] | Space-filling curves can be used to organise points in the plane into bounding-box hierarchies (such as R-trees). We develop measures of the bounding-box quality of space-filling curves that express how effective different space-filling curves are for this purpose. We give general lower bounds on the bounding-box quali... | {
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0806.4802 | A new Hedging algorithm and its application to inferring latent random
variables | [
"cs.GT",
"cs.AI"
] | We present a new online learning algorithm for cumulative discounted gain. This learning algorithm does not use exponential weights on the experts. Instead, it uses a weighting scheme that depends on the regret of the master algorithm relative to the experts. In particular, experts whose discounted cumulative gain is s... | {
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0806.4874 | Myopic Coding in Multiterminal Networks | [
"cs.IT",
"math.IT"
] | This paper investigates the interplay between cooperation and achievable rates in multi-terminal networks. Cooperation refers to the process of nodes working together to relay data toward the destination. There is an inherent tradeoff between achievable information transmission rates and the level of cooperation, which... | {
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0806.4899 | A Dynamic Programming Approach To Length-Limited Huffman Coding | [
"cs.DS",
"cs.IT",
"math.IT"
] | The ``state-of-the-art'' in Length Limited Huffman Coding algorithms is the $\Theta(ND)$-time, $\Theta(N)$-space one of Hirschberg and Larmore, where $D\le N$ is the length restriction on the code. This is a very clever, very problem specific, technique. In this note we show that there is a simple Dynamic-Programming (... | {
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0806.4920 | Conception et Evaluation de XQuery dans une architecture de m\'ediation
"Tout-XML" | [
"cs.DB"
] | XML has emerged as the leading language for representing and exchanging data not only on the Web, but also in general in the enterprise. XQuery is emerging as the standard query language for XML. Thus, tools are required to mediate between XML queries and heterogeneous data sources to integrate data in XML. This paper ... | {
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0806.4921 | Interpr\'etation vague des contraintes structurelles pour la RI dans des
corpus de documents XML - \'Evaluation d'une m\'ethode approch\'ee de RI
structur\'ee | [
"cs.IR"
] | We propose specific data structures designed to the indexing and retrieval of information elements in heterogeneous XML data bases. The indexing scheme is well suited to the management of various contextual searches, expressed either at a structural level or at an information content level. The approximate search mecha... | {
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0806.4958 | Deterministic Designs with Deterministic Guarantees: Toeplitz Compressed
Sensing Matrices, Sequence Designs and System Identification | [
"cs.IT",
"math.IT"
] | In this paper we present a new family of discrete sequences having "random like" uniformly decaying auto-correlation properties. The new class of infinite length sequences are higher order chirps constructed using irrational numbers. Exploiting results from the theory of continued fractions and diophantine approximatio... | {
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0806.4979 | Bounds on Codes Based on Graph Theory | [
"cs.IT",
"math.IT"
] | Let $A_q(n,d)$ be the maximum order (maximum number of codewords) of a $q$-ary code of length $n$ and Hamming distance at least $d$. And let $A(n,d,w)$ that of a binary code of constant weight $w$. Building on results from algebraic graph theory and Erd\H{o}s-ko-Rado like theorems in extremal combinatorics, we show how... | {
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0807.0023 | Automatic Metadata Generation using Associative Networks | [
"cs.IR",
"cs.DL"
] | In spite of its tremendous value, metadata is generally sparse and incomplete, thereby hampering the effectiveness of digital information services. Many of the existing mechanisms for the automated creation of metadata rely primarily on content analysis which can be costly and inefficient. The automatic metadata genera... | {
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0807.0042 | A Simple Converse Proof and a Unified Capacity Formula for Channels with
Input Constraints | [
"cs.IT",
"math.IT"
] | Given the single-letter capacity formula and the converse proof of a channel without constraints, we provide a simple approach to extend the results for the same channel but with constraints. The resulting capacity formula is the minimum of a Lagrange dual function. It gives an unified formula in the sense that it work... | {
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0807.0070 | Quantitative Paradigm of Software Reliability as Content Relevance | [
"cs.SE",
"cs.IR"
] | This paper presents a quantitative approach to software reliability and content relevance definitions validated by the systems' potential reliability law.Thus it is argued for the unified math nature or quantitative paradigm of software reliability and content relevance. | {
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0807.0087 | Path lengths in tree-child time consistent hybridization networks | [
"q-bio.PE",
"cs.CE",
"cs.DM",
"q-bio.QM"
] | Hybridization networks are representations of evolutionary histories that allow for the inclusion of reticulate events like recombinations, hybridizations, or lateral gene transfers. The recent growth in the number of hybridization network reconstruction algorithms has led to an increasing interest in the definition of... | {
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0807.0093 | Graph Kernels | [
"cs.LG"
] | We present a unified framework to study graph kernels, special cases of which include the random walk graph kernel \citep{GaeFlaWro03,BorOngSchVisetal05}, marginalized graph kernel \citep{KasTsuIno03,KasTsuIno04,MahUedAkuPeretal04}, and geometric kernel on graphs \citep{Gaertner02}. Through extensions of linear algebra... | {
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0807.0199 | Quadratic Forms and Space-Time Block Codes from Generalized Quaternion
and Biquaternion Algebras | [
"cs.IT",
"math.IT"
] | In the context of space-time block codes (STBCs), the theory of generalized quaternion and biquaternion algebras (i.e., tensor products of two quaternion algebras) over arbitrary base fields is presented, as well as quadratic form theoretic criteria to check if such algebras are division algebras. For base fields relev... | {
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0807.0204 | Diversity Multiplexing Tradeoff of Asynchronous Cooperative Relay
Networks | [
"cs.IT",
"math.IT"
] | The assumption of nodes in a cooperative communication relay network operating in synchronous fashion is often unrealistic. In the present paper, we consider two different models of asynchronous operation in cooperative-diversity networks experiencing slow fading and examine the corresponding diversity-multiplexing tra... | {
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0807.0245 | Full Diversity Codes for MISO Systems Equipped with Linear or ML
Detectors | [
"cs.IT",
"math.IT"
] | In this paper, a general criterion for space time block codes (STBC) to achieve full-diversity with a linear receiver is proposed for a wireless communication system having multiple transmitter and single receiver antennas (MISO). Particularly, the STBC with Toeplitz structure satisfies this criterion and therefore, en... | {
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0807.0311 | About the creation of a parallel bilingual corpora of web-publications | [
"cs.CL"
] | The algorithm of the creation texts parallel corpora was presented. The algorithm is based on the use of "key words" in text documents, and on the means of their automated translation. Key words were singled out by means of using Russian and Ukrainian morphological dictionaries, as well as dictionaries of the translati... | {
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0807.0337 | Unveiling the mystery of visual information processing in human brain | [
"cs.AI",
"cs.IR",
"cs.IT",
"math.IT",
"q-bio.NC"
] | It is generally accepted that human vision is an extremely powerful information processing system that facilitates our interaction with the surrounding world. However, despite extended and extensive research efforts, which encompass many exploration fields, the underlying fundamentals and operational principles of visu... | {
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0807.0517 | Modeling belief systems with scale-free networks | [
"cs.AI",
"physics.soc-ph"
] | Evolution of belief systems has always been in focus of cognitive research. In this paper we delineate a new model describing belief systems as a network of statements considered true. Testing the model a small number of parameters enabled us to reproduce a variety of well-known mechanisms ranging from opinion changes ... | {
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0807.0564 | Linear-Programming Receivers | [
"cs.IT",
"math.IT"
] | It is shown that any communication system which admits a sum-product (SP) receiver also admits a corresponding linear-programming (LP) receiver. The two receivers have a relationship defined by the local structure of the underlying graphical model, and are inhibited by the same phenomenon, which we call 'pseudoconfigur... | {
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0807.0565 | Music, Complexity, Information | [
"physics.soc-ph",
"cs.CL"
] | These are the preparatory notes for a Science & Music essay, "Playing by numbers", appeared in Nature 453 (2008) 988-989. | {
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0807.0595 | Nonstandard linear recurring sequence subgroups in finite fields and
automorphisms of cyclic codes | [
"cs.IT",
"cs.DM",
"math.CO",
"math.IT"
] | Let $q=p^r$ be a prime power, and let $f(x)=x^m-\gs_{m-1}x^{m-1}- >...-\gs_1x-\gs_0$ be an irreducible polynomial over the finite field $\GF(q)$ of size $q$. A zero $\xi$ of $f$ is called {\em nonstandard (of degree $m$) over $\GF(q)$} if the recurrence relation $u_m=\gs_{m-1}u_{m-1} + ... + \gs_1u_1+\gs_0u_0$ with cha... | {
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0807.0627 | Belief decision support and reject for textured images characterization | [
"cs.AI"
] | The textured images' classification assumes to consider the images in terms of area with the same texture. In uncertain environment, it could be better to take an imprecise decision or to reject the area corresponding to an unlearning class. Moreover, on the areas that are the classification units, we can have more tha... | {
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0807.0672 | Algorithmic Problem Complexity | [
"cs.CC",
"cs.IT",
"math.IT"
] | People solve different problems and know that some of them are simple, some are complex and some insoluble. The main goal of this work is to develop a mathematical theory of algorithmic complexity for problems. This theory is aimed at determination of computer abilities in solving different problems and estimation of r... | {
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0807.0821 | On Wiretap Networks II | [
"cs.IT",
"math.IT"
] | We consider the problem of securing a multicast network against a wiretapper that can intercept the packets on a limited number of arbitrary network links of his choice. We assume that the network implements network coding techniques to simultaneously deliver all the packets available at the source to all the destinati... | {
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0807.0868 | On the Capacity of Pairwise Collaborative Networks | [
"cs.IT",
"math.IT"
] | We derive expressions for the achievable rate region of a collaborative coding scheme in a two-transmitter, two-receiver Pairwise Collaborative Network (PCN) where one transmitter and receiver pair, namely relay pair, assists the other pair, namely the source pair, by partially decoding and forwarding the transmitted m... | {
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0807.0908 | The Correspondence Analysis Platform for Uncovering Deep Structure in
Data and Information | [
"cs.AI"
] | We study two aspects of information semantics: (i) the collection of all relationships, (ii) tracking and spotting anomaly and change. The first is implemented by endowing all relevant information spaces with a Euclidean metric in a common projected space. The second is modelled by an induced ultrametric. A very genera... | {
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0807.0942 | Secrecy via Sources and Channels | [
"cs.IT",
"math.IT"
] | Alice and Bob want to share a secret key and to communicate an independent message, both of which they desire to be kept secret from an eavesdropper Eve. We study this problem of secret communication and secret key generation when two resources are available -- correlated sources at Alice, Bob, and Eve, and a noisy bro... | {
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0807.1005 | Catching Up Faster by Switching Sooner: A Prequential Solution to the
AIC-BIC Dilemma | [
"math.ST",
"cs.IT",
"cs.LG",
"math.IT",
"stat.ME",
"stat.ML",
"stat.TH"
] | Bayesian model averaging, model selection and its approximations such as BIC are generally statistically consistent, but sometimes achieve slower rates og convergence than other methods such as AIC and leave-one-out cross-validation. On the other hand, these other methods can br inconsistent. We identify the "catch-up ... | {
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0807.1158 | Path Gain Algebraic Formulation for the Scalar Linear Network Coding
Problem | [
"cs.IT",
"math.IT"
] | In the algebraic view, the solution to a network coding problem is seen as a variety specified by a system of polynomial equations typically derived by using edge-to-edge gains as variables. The output from each sink is equated to its demand to obtain polynomial equations. In this work, we propose a method to derive th... | {
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0807.1211 | Flux: FunctionaL Updates for XML (extended report) | [
"cs.PL",
"cs.DB"
] | XML database query languages have been studied extensively, but XML database updates have received relatively little attention, and pose many challenges to language design. We are developing an XML update language called Flux, which stands for FunctionaL Updates for XML, drawing upon ideas from functional programming l... | {
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0807.1253 | Informed Traders | [
"q-fin.TR",
"cs.IT",
"math.IT",
"math.PR"
] | An asymmetric information model is introduced for the situation in which there is a small agent who is more susceptible to the flow of information in the market than the general market participant, and who tries to implement strategies based on the additional information. In this model market participants have access t... | {
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0807.1267 | Optimal Direct Sum and Privacy Trade-off Results for Quantum and
Classical Communication Complexity | [
"cs.DC",
"cs.IT",
"math.IT"
] | We show optimal Direct Sum result for the one-way entanglement-assisted quantum communication complexity for any relation f subset of X x Y x Z. We show: Q^{1,pub}(f^m) = Omega(m Q^{1,pub}(f)), where Q^{1,pub}(f), represents the one-way entanglement-assisted quantum communication complexity of f with error at most 1/3 ... | {
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0807.1313 | On the Tradeoffs of Implementing Randomized Network Coding in Multicast
Networks | [
"cs.IT",
"math.IT"
] | Randomized network coding (RNC) greatly reduces the complexity of implementing network coding in large-scale, heterogeneous networks. This paper examines two tradeoffs in applying RNC: The first studies how the performance of RNC varies with a node's randomizing capabilities. Specifically, a limited randomized network ... | {
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0807.1372 | Communication over Finite-Field Matrix Channels | [
"cs.IT",
"math.IT"
] | This paper is motivated by the problem of error control in network coding when errors are introduced in a random fashion (rather than chosen by an adversary). An additive-multiplicative matrix channel is considered as a model for random network coding. The model assumes that n packets of length m are transmitted over t... | {
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0807.1475 | Simulations of Large-scale WiFi-based Wireless Networks:
Interdisciplinary Challenges and Applications | [
"cs.CE",
"cs.DC"
] | Wireless Fidelity (WiFi) is the fastest growing wireless technology to date. In addition to providing wire-free connectivity to the Internet WiFi technology also enables mobile devices to connect directly to each other and form highly dynamic wireless adhoc networks. Such distributed networks can be used to perform coo... | {
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0807.1494 | Algorithm Selection as a Bandit Problem with Unbounded Losses | [
"cs.AI",
"cs.GT",
"cs.LG"
] | Algorithm selection is typically based on models of algorithm performance, learned during a separate offline training sequence, which can be prohibitively expensive. In recent work, we adopted an online approach, in which a performance model is iteratively updated and used to guide selection on a sequence of problem in... | {
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0807.1513 | A First-Order Non-Homogeneous Markov Model for the Response of Spiking
Neurons Stimulated by Small Phase-Continuous Signals | [
"q-bio.NC",
"cs.NE"
] | We present a first-order non-homogeneous Markov model for the interspike-interval density of a continuously stimulated spiking neuron. The model allows the conditional interspike-interval density and the stationary interspike-interval density to be expressed as products of two separate functions, one of which describes... | {
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0807.1543 | On the Capacity of MIMO Interference Channels | [
"cs.IT",
"math.IT"
] | The capacity region of a multiple-input-multiple-output interference channel (MIMO IC) where the channel matrices are square and invertible is studied. The capacity region for strong interference is established where the definition of strong interference parallels that of scalar channels. Moreover, the sum-rate capacit... | {
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0807.1550 | Discernment of Hubs and Clusters in Socioeconomic Networks | [
"physics.soc-ph",
"cs.SI",
"physics.data-an",
"stat.AP"
] | Interest in the analysis of networks has grown rapidly in the new millennium. Consequently, we promote renewed attention to a certain methodological approach introduced in 1974. Over the succeeding decade, this two-stage--double-standardization and hierarchical clustering (single-linkage-like)--procedure was applied to... | {
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0807.1560 | Scientific Paper Summarization Using Citation Summary Networks | [
"cs.IR",
"cs.CL"
] | Quickly moving to a new area of research is painful for researchers due to the vast amount of scientific literature in each field of study. One possible way to overcome this problem is to summarize a scientific topic. In this paper, we propose a model of summarizing a single article, which can be further used to summar... | {
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0807.1734 | Faster Sequential Search with a Two-Pass Dynamic-Time-Warping Lower
Bound | [
"cs.DB"
] | The Dynamic Time Warping (DTW) is a popular similarity measure between time series. The DTW fails to satisfy the triangle inequality and its computation requires quadratic time. Hence, to find closest neighbors quickly, we use bounding techniques. We can avoid most DTW computations with an inexpensive lower bound (LB_K... | {
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0807.1773 | Spatial Interference Cancellation for Multi-Antenna Mobile Ad Hoc
Networks | [
"cs.IT",
"math.IT"
] | Interference between nodes is a critical impairment in mobile ad hoc networks (MANETs). This paper studies the role of multiple antennas in mitigating such interference. Specifically, a network is studied in which receivers apply zero-forcing beamforming to cancel the strongest interferers. Assuming a network with Pois... | {
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0807.1906 | Extension of Inagaki General Weighted Operators and A New Fusion Rule
Class of Proportional Redistribution of Intersection Masses | [
"cs.AI"
] | In this paper we extend Inagaki Weighted Operators fusion rule (WO) in information fusion by doing redistribution of not only the conflicting mass, but also of masses of non-empty intersections, that we call Double Weighted Operators (DWO). Then we propose a new fusion rule Class of Proportional Redistribution of Inter... | {
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0807.1997 | Multi-Instance Learning by Treating Instances As Non-I.I.D. Samples | [
"cs.LG",
"cs.AI"
] | Multi-instance learning attempts to learn from a training set consisting of labeled bags each containing many unlabeled instances. Previous studies typically treat the instances in the bags as independently and identically distributed. However, the instances in a bag are rarely independent, and therefore a better perfo... | {
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0807.2028 | On Krause's multi-agent consensus model with state-dependent
connectivity (Extended version) | [
"cs.MA"
] | We study a model of opinion dynamics introduced by Krause: each agent has an opinion represented by a real number, and updates its opinion by averaging all agent opinions that differ from its own by less than 1. We give a new proof of convergence into clusters of agents, with all agents in the same cluster holding the ... | {
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0807.2043 | Intrusion Detection Using Cost-Sensitive Classification | [
"cs.CR",
"cs.CV",
"cs.NI"
] | Intrusion Detection is an invaluable part of computer networks defense. An important consideration is the fact that raising false alarms carries a significantly lower cost than not detecting at- tacks. For this reason, we examine how cost-sensitive classification methods can be used in Intrusion Detection systems. The ... | {
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0807.2047 | The Five Points Pose Problem : A New and Accurate Solution Adapted to
any Geometric Configuration | [
"cs.CV"
] | The goal of this paper is to estimate directly the rotation and translation between two stereoscopic images with the help of five homologous points. The methodology presented does not mix the rotation and translation parameters, which is comparably an important advantage over the methods using the well-known essential ... | {
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0807.2108 | On dual Schur domain decomposition method for linear first-order
transient problems | [
"cs.NA",
"cs.CE"
] | This paper addresses some numerical and theoretical aspects of dual Schur domain decomposition methods for linear first-order transient partial differential equations. In this work, we consider the trapezoidal family of schemes for integrating the ordinary differential equations (ODEs) for each subdomain and present fo... | {
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0807.2158 | Universally-composable privacy amplification from causality constraints | [
"quant-ph",
"cs.CR",
"cs.IT",
"math.IT"
] | We consider schemes for secret key distribution which use as a resource correlations that violate Bell inequalities. We provide the first security proof for such schemes, according to the strongest notion of security, the so called universally-composable security. Our security proof does not rely on the validity of qua... | {
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0807.2268 | Multihop Diversity in Wideband OFDM Systems: The Impact of Spatial Reuse
and Frequency Selectivity | [
"cs.IT",
"math.IT"
] | The goal of this paper is to establish which practical routing schemes for wireless networks are most suitable for wideband systems in the power-limited regime, which is, for example, a practically relevant mode of operation for the analysis of ultrawideband (UWB) mesh networks. For this purpose, we study the tradeoff ... | {
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0807.2282 | Hardware/Software Co-Design for Spike Based Recognition | [
"cs.NE",
"cs.AI",
"cs.CE"
] | The practical applications based on recurrent spiking neurons are limited due to their non-trivial learning algorithms. The temporal nature of spiking neurons is more favorable for hardware implementation where signals can be represented in binary form and communication can be done through the use of spikes. This work ... | {
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0807.2292 | Rate and power allocation under the pairwise distributed source coding
constraint | [
"cs.IT",
"math.IT"
] | We consider the problem of rate and power allocation for a sensor network under the pairwise distributed source coding constraint. For noiseless source-terminal channels, we show that the minimum sum rate assignment can be found by finding a minimum weight arborescence in an appropriately defined directed graph. For or... | {
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0807.2358 | Polygon Exploration with Time-Discrete Vision | [
"cs.CG",
"cs.RO"
] | With the advent of autonomous robots with two- and three-dimensional scanning capabilities, classical visibility-based exploration methods from computational geometry have gained in practical importance. However, real-life laser scanning of useful accuracy does not allow the robot to scan continuously while in motion; ... | {
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0807.2383 | CPBVP: A Constraint-Programming Framework for Bounded Program
Verification | [
"cs.SE",
"cs.AI",
"cs.LO"
] | This paper studies how to verify the conformity of a program with its specification and proposes a novel constraint-programming framework for bounded program verification (CPBPV). The CPBPV framework uses constraint stores to represent the specification and the program and explores execution paths nondeterministically.... | {
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0807.2440 | Construction of Error-Correcting Codes for Random Network Coding | [
"cs.IT",
"math.IT"
] | In this work we present error-correcting codes for random network coding based on rank- metric codes, Ferrers diagrams, and puncturing. For most parameters, the constructed codes are larger than all previously known codes. | {
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0807.2464 | On "Bit-Interleaved Coded Multiple Beamforming" | [
"cs.IT",
"math.IT"
] | The interleaver design criteria described in [1] should take into account all error patterns of interest. | {
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0807.2471 | An ESPRIT-based approach for Initial Ranging in OFDMA systems | [
"cs.IT",
"math.IT"
] | This work presents a novel Initial Ranging scheme for orthogonal frequency-division multiple-access networks. Users that intend to establish a communication link with the base station (BS) are normally misaligned both in time and frequency and the goal is to jointly estimate their timing errors and carrier frequency of... | {
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0807.2475 | Opportunistic Collaborative Beamforming with One-Bit Feedback | [
"cs.IT",
"math.IT"
] | An energy-efficient opportunistic collaborative beamformer with one-bit feedback is proposed for ad hoc sensor networks over Rayleigh fading channels. In contrast to conventional collaborative beamforming schemes in which each source node uses channel state information to correct its local carrier offset and channel ph... | {
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0807.2496 | Hybrid Keyword Search Auctions | [
"cs.GT",
"cs.DS",
"cs.IR"
] | Search auctions have become a dominant source of revenue generation on the Internet. Such auctions have typically used per-click bidding and pricing. We propose the use of hybrid auctions where an advertiser can make a per-impression as well as a per-click bid, and the auctioneer then chooses one of the two as the pric... | {
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0807.2569 | Text Data Mining: Theory and Methods | [
"stat.ML",
"cs.IR",
"stat.CO"
] | This paper provides the reader with a very brief introduction to some of the theory and methods of text data mining. The intent of this article is to introduce the reader to some of the current methodologies that are employed within this discipline area while at the same time making the reader aware of some of the inte... | {
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0807.2648 | On Endogenous Reconfiguration in Mobile Robotic Networks | [
"cs.RO"
] | In this paper, our focus is on certain applications for mobile robotic networks, where reconfiguration is driven by factors intrinsic to the network rather than changes in the external environment. In particular, we study a version of the coverage problem useful for surveillance applications, where the objective is to ... | {
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0807.2666 | Source and Channel Coding for Correlated Sources Over Multiuser Channels | [
"cs.IT",
"math.IT"
] | Source and channel coding over multiuser channels in which receivers have access to correlated source side information is considered. For several multiuser channel models necessary and sufficient conditions for optimal separation of the source and channel codes are obtained. In particular, the multiple access channel, ... | {
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0807.2677 | Algorithms for Dynamic Spectrum Access with Learning for Cognitive Radio | [
"cs.NI",
"cs.LG"
] | We study the problem of dynamic spectrum sensing and access in cognitive radio systems as a partially observed Markov decision process (POMDP). A group of cognitive users cooperatively tries to exploit vacancies in primary (licensed) channels whose occupancies follow a Markovian evolution. We first consider the scenari... | {
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0807.2678 | Eigenfactor : Does the Principle of Repeated Improvement Result in
Better Journal Impact Estimates than Raw Citation Counts? | [
"cs.DL",
"cs.DB"
] | Eigenfactor.org, a journal evaluation tool which uses an iterative algorithm to weight citations (similar to the PageRank algorithm used for Google) has been proposed as a more valid method for calculating the impact of journals. The purpose of this brief communication is to investigate whether the principle of repeate... | {
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0807.2680 | Group Divisible Codes and Their Application in the Construction of
Optimal Constant-Composition Codes of Weight Three | [
"cs.IT",
"cs.DM",
"math.CO",
"math.IT"
] | The concept of group divisible codes, a generalization of group divisible designs with constant block size, is introduced in this paper. This new class of codes is shown to be useful in recursive constructions for constant-weight and constant-composition codes. Large classes of group divisible codes are constructed whi... | {
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0807.2701 | A Cutting Plane Method based on Redundant Rows for Improving Fractional
Distance | [
"cs.IT",
"math.IT"
] | In this paper, an idea of the cutting plane method is employed to improve the fractional distance of a given binary parity check matrix. The fractional distance is the minimum weight (with respect to l1-distance) of vertices of the fundamental polytope. The cutting polytope is defined based on redundant rows of the par... | {
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0807.2724 | An Asymptotic Analysis of the MIMO BC under Linear Filtering | [
"cs.IT",
"math.IT"
] | We investigate the MIMO broadcast channel in the high SNR regime when linear filtering is applied instead of dirty paper coding. Using a user-wise rate duality where the streams of every single user are not treated as self-interference as in the hitherto existing stream-wise rate dualities for linear filtering, we solv... | {
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0807.2728 | Iterative ('Turbo') Multiuser Detectors For Impulse Radio Systems | [
"cs.IT",
"math.IT"
] | In recent years, there has been a growing interest in multiple access communication systems that spread their transmitted energy over very large bandwidths. These systems, which are referred to as ultra wide-band (UWB) systems, have various advantages over narrow-band and conventional wide-band systems. The importance ... | {
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0807.2730 | Position Estimation via Ultra-Wideband Signals | [
"cs.IT",
"math.IT"
] | The high time resolution of ultra-wideband (UWB) signals facilitates very precise position estimation in many scenarios, which makes a variety applications possible. This paper reviews the problem of position estimation in UWB systems, beginning with an overview of the basic structure of UWB signals and their positioni... | {
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0807.2844 | On the Performance of Selection Relaying | [
"cs.IT",
"math.IT"
] | Interest in selection relaying is growing. The recent developments in this area have largely focused on information theoretic analyses such as outage performance. Some of these analyses are accurate only at high SNR regimes. In this paper error rate analyses that are sufficiently accurate over a wide range of SNR regim... | {
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0807.2859 | The Transport Capacity of a Wireless Network is a Subadditive Euclidean
Functional | [
"cs.IT",
"math.IT"
] | The transport capacity of a dense ad hoc network with n nodes scales like \sqrt(n). We show that the transport capacity divided by \sqrt(n) approaches a non-random limit with probability one when the nodes are i.i.d. distributed on the unit square. We prove that the transport capacity under the protocol model is a suba... | {
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0807.2928 | Visual Grouping by Neural Oscillators | [
"cs.CV",
"cs.NE"
] | Distributed synchronization is known to occur at several scales in the brain, and has been suggested as playing a key functional role in perceptual grouping. State-of-the-art visual grouping algorithms, however, seem to give comparatively little attention to neural synchronization analogies. Based on the framework of c... | {
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0807.2972 | DescribeX: A Framework for Exploring and Querying XML Web Collections | [
"cs.DB"
] | This thesis introduces DescribeX, a powerful framework that is capable of describing arbitrarily complex XML summaries of web collections, providing support for more efficient evaluation of XPath workloads. DescribeX permits the declarative description of document structure using all axes and language constructs in XPa... | {
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0807.2983 | On Probability Distributions for Trees: Representations, Inference and
Learning | [
"cs.LG"
] | We study probability distributions over free algebras of trees. Probability distributions can be seen as particular (formal power) tree series [Berstel et al 82, Esik et al 03], i.e. mappings from trees to a semiring K . A widely studied class of tree series is the class of rational (or recognizable) tree series which ... | {
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0807.3006 | The rank convergence of HITS can be slow | [
"cs.DS",
"cs.IR"
] | We prove that HITS, to "get right" h of the top k ranked nodes of an N>=2k node graph, can require h^(Omega(N h/k)) iterations (i.e. a substantial Omega(N h log(h)/k) matrix multiplications even with a "squaring trick"). Our proof requires no algebraic tools and is entirely self-contained. | {
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0807.3050 | Dimensionally Distributed Learning: Models and Algorithm | [
"cs.IT",
"math.IT"
] | This paper introduces a framework for regression with dimensionally distributed data with a fusion center. A cooperative learning algorithm, the iterative conditional expectation algorithm (ICEA), is designed within this framework. The algorithm can effectively discover linear combinations of individual estimators trai... | {
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0807.3065 | Sharp Bounds for Optimal Decoding of Low Density Parity Check Codes | [
"cs.IT",
"math.IT"
] | Consider communication over a binary-input memoryless output-symmetric channel with low density parity check (LDPC) codes and maximum a posteriori (MAP) decoding. The replica method of spin glass theory allows to conjecture an analytic formula for the average input-output conditional entropy per bit in the infinite blo... | {
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0807.3094 | Energy-Efficient Resource Allocation in Multiuser MIMO Systems: A
Game-Theoretic Framework | [
"cs.IT",
"cs.GT",
"math.IT"
] | This paper focuses on the cross-layer issue of resource allocation for energy efficiency in the uplink of a multiuser MIMO wireless communication system. Assuming that all of the transmitters and the uplink receiver are equipped with multiple antennas, the situation considered is that in which each terminal is allowed ... | {
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0807.3096 | Stochastic Maximum Principle for a PDEs with noise and control on the
boundary | [
"math.PR",
"cs.SY",
"math.OC"
] | In this paper we prove necessary conditions for optimality of a stochastic control problem for a class of stochastic partial differential equations that is controlled through the boundary. This kind of problems can be interpreted as a stochastic control problem for an evolution system in an Hilbert space. The regularit... | {
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0807.3097 | Energy-Efficient Power Control in Multipath CDMA Channels via Large
System Analysis | [
"cs.IT",
"cs.GT",
"math.IT"
] | This paper is focused on the design and analysis of power control procedures for the uplink of multipath code-division-multiple-access (CDMA) channels based on the large system analysis (LSA). Using the tools of LSA, a new decentralized power control algorithm aimed at energy efficiency maximization and requiring very ... | {
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} |
0807.3156 | Algorithmic randomness and splitting of supermartingales | [
"cs.IT",
"math.IT"
] | Randomness in the sense of Martin-L\"of can be defined in terms of lower semicomputable supermartingales. We show that such a supermartingale cannot be replaced by a pair of supermartingales that bet only on the even bits (the first one) and on the odd bits (the second one) knowing all preceding bits. | {
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} |
0807.3198 | On algebras admitting a complete set of near weights, evaluation codes
and Goppa codes | [
"cs.IT",
"math.IT"
] | In 1998 Hoholdt, van Lint and Pellikaan introduced the concept of a ``weight function'' defined on a F_q-algebra and used it to construct linear codes, obtaining among them the algebraic-geometric (AG) codes supported on one point. Later it was proved by Matsumoto that all codes produced using a weight function are act... | {
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} |
0807.3212 | Construction of Large Constant Dimension Codes With a Prescribed Minimum
Distance | [
"cs.IT",
"cs.DM",
"math.CO",
"math.IT"
] | In this paper we construct constant dimension space codes with prescribed minimum distance. There is an increased interest in space codes since a paper by Koetter and Kschischang were they gave an application in network coding. There is also a connection to the theory of designs over finite fields. We will modify a met... | {
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} |
0807.3222 | The two-user Gaussian interference channel: a deterministic view | [
"cs.IT",
"math.IT"
] | This paper explores the two-user Gaussian interference channel through the lens of a natural deterministic channel model. The main result is that the deterministic channel uniformly approximates the Gaussian channel, the capacity regions differing by a universal constant. The problem of finding the capacity of the Gaus... | {
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} |
0807.3223 | The NAO humanoid: a combination of performance and affordability | [
"cs.RO"
] | This article presents the design of the autonomous humanoid robot called NAO that is built by the French company Aldebaran-Robotics. With its height of 0.57 m and its weight about 4.5 kg, this innovative robot is lightweight and compact. It distinguishes itself from its existing Japanese, American, and other counterpar... | {
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} |
0807.3225 | Exploiting Bird Locomotion Kinematics Data for Robotics Modeling | [
"cs.RO"
] | We present here the results of an analysis carried out by biologists and roboticists with the aim of modeling bird locomotion kinematics for robotics purposes. The aim was to develop a bio-inspired kinematic model of the bird leg from biological data. We first acquired and processed kinematic data for sagittal and top ... | {
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} |
0807.3287 | Constructing a Knowledge Base for Gene Regulatory Dynamics by Formal
Concept Analysis Methods | [
"q-bio.MN",
"cs.AI",
"math.LO"
] | Our aim is to build a set of rules, such that reasoning over temporal dependencies within gene regulatory networks is possible. The underlying transitions may be obtained by discretizing observed time series, or they are generated based on existing knowledge, e.g. by Boolean networks or their nondeterministic generaliz... | {
"Other": 0,
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} |
0807.3332 | Energy-efficient Scheduling of Delay Constrained Traffic over Fading
Channels | [
"cs.IT",
"math.IT"
] | A delay-constrained scheduling problem for point-to-point communication is considered: a packet of $B$ bits must be transmitted by a hard deadline of $T$ slots over a time-varying channel. The transmitter/scheduler must determine how many bits to transmit, or equivalently how much energy to transmit with, during each t... | {
"Other": 0,
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} |
0807.3337 | Algebraic constructions of LDPC codes with no short cycles | [
"math.RA",
"cs.IT",
"math.IT"
] | An algebraic group ring method for constructing codes with no short cycles in the check matrix is derived. It is shown that the matrix of a group ring element has no short cycles if and only if the collection of group differences of this element has no repeats. When applied to elements in the group ring with small supp... | {
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} |
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