id stringlengths 9 16 | title stringlengths 4 278 | categories listlengths 1 13 | abstract stringlengths 3 4.08k | filtered_category_membership dict |
|---|---|---|---|---|
cs/0601060 | Robot Swarms in an Uncertain World: Controllable Adaptability | [
"cs.RO"
] | There is a belief that complexity and chaos are essential for adaptability. But life deals with complexity every moment, without the chaos that engineers fear so, by invoking goal-directed behaviour. Goals can be programmed. That is why living organisms give us hope to achieve adaptability in robots. In this paper a me... | {
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cs/0601061 | Modular Adaptive System Based on a Multi-Stage Neural Structure for
Recognition of 2D Objects of Discontinuous Production | [
"cs.RO"
] | This is a presentation of a new system for invariant recognition of 2D objects with overlapping classes, that can not be effectively recognized with the traditional methods. The translation, scale and partial rotation invariant contour object description is transformed in a DCT spectrum space. The obtained frequency sp... | {
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cs/0601062 | Study of Self-Organization Model of Multiple Mobile Robot | [
"cs.RO"
] | A good organization model of multiple mobile robot should be able to improve the efficiency of the system, reduce the complication of robot interactions, and detract the difficulty of computation. From the sociology aspect of topology, structure and organization, this paper studies the multiple mobile robot organizatio... | {
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cs/0601063 | Optimal Point-to-Point Trajectory Tracking of Redundant Manipulators
using Generalized Pattern Search | [
"cs.RO"
] | Optimal point-to-point trajectory planning for planar redundant manipulator is considered in this study. The main objective is to minimize the sum of the position error of the end-effector at each intermediate point along the trajectory so that the end-effector can track the prescribed trajectory accurately. An algorit... | {
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cs/0601064 | Robotics Vision-based Heuristic Reasoning for Underwater Target Tracking
and Navigation | [
"cs.RO"
] | This paper presents a robotics vision-based heuristic reasoning system for underwater target tracking and navigation. This system is introduced to improve the level of automation of underwater Remote Operated Vehicles (ROVs) operations. A prototype which combines computer vision with an underwater robotics system is su... | {
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cs/0601065 | New Intelligent Transmission Concept for Hybrid Mobile Robot Speed
Control | [
"cs.RO"
] | This paper presents a new concept of a mobile robot speed control by using two degree of freedom gear transmission. The developed intelligent speed controller utilizes a gear box which comprises of epicyclic gear train with two inputs, one coupled with the engine shaft and another with the shaft of a variable speed dc ... | {
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cs/0601066 | On the Existence of Universally Decodable Matrices | [
"cs.IT",
"cs.DM",
"math.IT"
] | Universally decodable matrices (UDMs) can be used for coding purposes when transmitting over slow fading channels. These matrices are parameterized by positive integers $L$ and $N$ and a prime power $q$. The main result of this paper is that the simple condition $L \leq q+1$ is both necessary and sufficient for $(L,N,q... | {
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cs/0601067 | Design of Rate-Compatible Serially Concatenated Convolutional Codes | [
"cs.IT",
"math.IT"
] | Recently a powerful class of rate-compatible serially concatenated convolutional codes (SCCCs) have been proposed based on minimizing analytical upper bounds on the error probability in the error floor region. Here this class of codes is further investigated by combining analytical upper bounds with extrinsic informati... | {
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cs/0601070 | Instanton analysis of Low-Density-Parity-Check codes in the error-floor
regime | [
"cs.IT",
"cond-mat.dis-nn",
"math.IT"
] | In this paper we develop instanton method introduced in [1], [2], [3] to analyze quantitatively performance of Low-Density-Parity-Check (LDPC) codes decoded iteratively in the so-called error-floor regime. We discuss statistical properties of the numerical instanton-amoeba scheme focusing on detailed analysis and compa... | {
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cs/0601072 | Fast Frequent Querying with Lazy Control Flow Compilation | [
"cs.PL",
"cs.AI",
"cs.SE"
] | Control flow compilation is a hybrid between classical WAM compilation and meta-call, limited to the compilation of non-recursive clause bodies. This approach is used successfully for the execution of dynamically generated queries in an inductive logic programming setting (ILP). Control flow compilation reduces compila... | {
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cs/0601073 | A Theory of Routing for Large-Scale Wireless Ad-Hoc Networks | [
"cs.IT",
"cs.NI",
"math.IT"
] | In this work we develop a new theory to analyse the process of routing in large-scale ad-hoc wireless networks. We use a path integral formulation to examine the properties of the paths generated by different routing strategies in these kinds of networks. Using this theoretical framework, we calculate the statistical d... | {
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cs/0601074 | Joint universal lossy coding and identification of i.i.d. vector sources | [
"cs.IT",
"cs.LG",
"math.IT"
] | The problem of joint universal source coding and modeling, addressed by Rissanen in the context of lossless codes, is generalized to fixed-rate lossy coding of continuous-alphabet memoryless sources. We show that, for bounded distortion measures, any compactly parametrized family of i.i.d. real vector sources with abso... | {
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cs/0601075 | On Universally Decodable Matrices for Space-Time Coding | [
"cs.IT",
"cs.DM",
"math.IT"
] | The notion of universally decodable matrices (UDMs) was recently introduced by Tavildar and Viswanath while studying slow fading channels. It turns out that the problem of constructing UDMs is tightly connected to the problem of constructing maximum distance separable (MDS) codes. In this paper, we first study the prop... | {
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cs/0601077 | IDBE - An Intelligent Dictionary Based Encoding Algorithm for Text Data
Compression for High Speed Data Transmission Over Internet | [
"cs.IT",
"math.IT"
] | Compression algorithms reduce the redundancy in data representation to decrease the storage required for that data. Data compression offers an attractive approach to reducing communication costs by using available bandwidth effectively. Over the last decade there has been an unprecedented explosion in the amount of dig... | {
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cs/0601080 | On Measure Theoretic definitions of Generalized Information Measures and
Maximum Entropy Prescriptions | [
"cs.IT",
"math.IT"
] | Though Shannon entropy of a probability measure $P$, defined as $- \int_{X} \frac{\ud P}{\ud \mu} \ln \frac{\ud P}{\ud\mu} \ud \mu$ on a measure space $(X, \mathfrak{M},\mu)$, does not qualify itself as an information measure (it is not a natural extension of the discrete case), maximum entropy (ME) prescriptions in th... | {
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cs/0601081 | An O(1) Solution to the Prefix Sum Problem on a Specialized Memory
Architecture | [
"cs.DS",
"cs.CC",
"cs.IR"
] | In this paper we study the Prefix Sum problem introduced by Fredman. We show that it is possible to perform both update and retrieval in O(1) time simultaneously under a memory model in which individual bits may be shared by several words. We also show that two variants (generalizations) of the problem can be solve... | {
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cs/0601083 | Multilevel Coding for Channels with Non-uniform Inputs and Rateless
Transmission over the BSC | [
"cs.IT",
"math.IT"
] | We consider coding schemes for channels with non-uniform inputs (NUI), where standard linear block codes can not be applied directly. We show that multilevel coding (MLC) with a set of linear codes and a deterministic mapper can achieve the information rate of the channel with NUI. The mapper, however, does not have to... | {
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cs/0601087 | Processing of Test Matrices with Guessing Correction | [
"cs.LG"
] | It is suggested to insert into test matrix 1s for correct responses, 0s for response refusals, and negative corrective elements for incorrect responses. With the classical test theory approach test scores of examinees and items are calculated traditionally as sums of matrix elements, organized in rows and columns. Corr... | {
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cs/0601088 | An Algorithm for Constructing All Families of Codes of Arbitrary
Requirement in an OCDMA System | [
"cs.IT",
"math.IT"
] | A novel code construction algorithm is presented to find all the possible code families for code reconfiguration in an OCDMA system. The algorithm is developed through searching all the complete subgraphs of a constructed graph. The proposed algorithm is flexible and practical for constructing optical orthogonal codes ... | {
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cs/0601089 | Distributed Kernel Regression: An Algorithm for Training Collaboratively | [
"cs.LG",
"cs.AI",
"cs.DC",
"cs.IT",
"math.IT"
] | This paper addresses the problem of distributed learning under communication constraints, motivated by distributed signal processing in wireless sensor networks and data mining with distributed databases. After formalizing a general model for distributed learning, an algorithm for collaboratively training regularized k... | {
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cs/0601090 | Improved Nearly-MDS Expander Codes | [
"cs.IT",
"math.IT"
] | A construction of expander codes is presented with the following three properties: (i) the codes lie close to the Singleton bound, (ii) they can be encoded in time complexity that is linear in their code length, and (iii) they have a linear-time bounded-distance decoder. By using a version of the decoder that corre... | {
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cs/0601091 | Communication Over MIMO Broadcast Channels Using Lattice-Basis Reduction | [
"cs.IT",
"math.IT"
] | A simple scheme for communication over MIMO broadcast channels is introduced which adopts the lattice reduction technique to improve the naive channel inversion method. Lattice basis reduction helps us to reduce the average transmitted energy by modifying the region which includes the constellation points. Simulation r... | {
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cs/0601092 | LLL Reduction Achieves the Receive Diversity in MIMO Decoding | [
"cs.IT",
"math.IT"
] | Diversity order is an important measure for the performance of communication systems over MIMO fading channels. In this paper, we prove that in MIMO multiple access systems (or MIMO point-to-point systems with V-BLAST transmission), lattice-reduction-aided decoding achieves the maximum receive diversity (which is equal... | {
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cs/0601093 | Stability of Scheduled Multi-access Communication over Quasi-static Flat
Fading Channels with Random Coding and Joint Maximum Likelihood Decoding | [
"cs.IT",
"math.IT"
] | We consider stability of scheduled multiaccess message communication with random coding and joint maximum-likehood decoding of messages. The framework we consider here models both the random message arrivals and the subsequent reliable communication by suitably combining techniques from queueing theory and information ... | {
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cs/0601094 | Stability of Scheduled Message Communication over Degraded Broadcast
Channels | [
"cs.IT",
"math.IT"
] | We consider scheduled message communication over a discrete memoryless degraded broadcast channel. The framework we consider here models both the random message arrivals and the subsequent reliable communication by suitably combining techniques from queueing theory and information theory. The channel from the transmitt... | {
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cs/0601095 | On the Weight Enumerator and the Maximum Likelihood Performance of
Linear Product Codes | [
"cs.IT",
"math.IT"
] | Product codes are widely used in data-storage, optical and wireless applications. Their analytical performance evaluation usually relies on the truncated union bound, which provides a low error rate approximation based on the minimum distance term only. In fact, the complete weight enumerator of most product codes rema... | {
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cs/0601098 | Energy Efficiency and Delay Quality-of-Service in Wireless Networks | [
"cs.IT",
"math.IT"
] | The energy-delay tradeoffs in wireless networks are studied using a game-theoretic framework. A multi-class multiple-access network is considered in which users choose their transmit powers, and possibly transmission rates, in a distributed manner to maximize their own utilities while satisfying their delay quality-of-... | {
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cs/0601099 | Adaptive Linear Programming Decoding | [
"cs.IT",
"math.IT"
] | Detectability of failures of linear programming (LP) decoding and its potential for improvement by adding new constraints motivate the use of an adaptive approach in selecting the constraints for the LP problem. In this paper, we make a first step in studying this method, and show that it can significantly reduce the c... | {
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cs/0601102 | Geometric symmetry in the quadratic Fisher discriminant operating on
image pixels | [
"cs.IT",
"cs.CV",
"math.IT"
] | This article examines the design of Quadratic Fisher Discriminants (QFDs) that operate directly on image pixels, when image ensembles are taken to comprise all rotated and reflected versions of distinct sample images. A procedure based on group theory is devised to identify and discard QFD coefficients made redundant b... | {
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cs/0601103 | Google Web APIs - an Instrument for Webometric Analyses? | [
"cs.IR"
] | This paper introduces Google Web APIs (Google APIs) as an instrument and playground for webometric studies. Several examples of Google APIs implementations are given. Our examples show that this Google Web Service can be used successfully for informetric Internet based studies albeit with some restrictions. | {
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cs/0601105 | The Perceptron Algorithm: Image and Signal Decomposition, Compression,
and Analysis by Iterative Gaussian Blurring | [
"cs.CV"
] | A novel algorithm for tunable compression to within the precision of reproduction targets, or storage, is proposed. The new algorithm is termed the `Perceptron Algorithm', which utilises simple existing concepts in a novel way, has multiple immediate commercial application aspects as well as it opens up a multitude of ... | {
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cs/0601106 | The `Face on Mars': a photographic approach for the search of signs of
past civilizations from a macroscopic point of view, factoring long-term
erosion in image reconstruction | [
"cs.CV"
] | This short article presents an alternative view of high resolution imaging from various sources with the aim of the discovery of potential sites of archaeological importance, or sites that exhibit `anomalies' such that they may merit closer inspection and analysis. It is conjectured, and to a certain extent demonstrate... | {
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cs/0601107 | Structure of Optimal Input Covariance Matrices for MIMO Systems with
Covariance Feedback under General Correlated Fading | [
"cs.IT",
"math.IT"
] | We describe the structure of optimal Input covariance matrices for single user multiple-input/multiple-output (MIMO) communication system with covariance feedback and for general correlated fading. Our approach is based on the novel concept of right commutant and recovers previously derived results for the Kronecker pr... | {
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cs/0601108 | Fast Lexically Constrained Viterbi Algorithm (FLCVA): Simultaneous
Optimization of Speed and Memory | [
"cs.CV",
"cs.AI",
"cs.DS"
] | Lexical constraints on the input of speech and on-line handwriting systems improve the performance of such systems. A significant gain in speed can be achieved by integrating in a digraph structure the different Hidden Markov Models (HMM) corresponding to the words of the relevant lexicon. This integration avoids redun... | {
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cs/0601109 | Certainty Closure: Reliable Constraint Reasoning with Incomplete or
Erroneous Data | [
"cs.AI"
] | Constraint Programming (CP) has proved an effective paradigm to model and solve difficult combinatorial satisfaction and optimisation problems from disparate domains. Many such problems arising from the commercial world are permeated by data uncertainty. Existing CP approaches that accommodate uncertainty are less suit... | {
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cs/0601110 | Mutual Information Games in Multi-user Channels with Correlated Jamming | [
"cs.IT",
"math.IT"
] | We investigate the behavior of two users and one jammer in an AWGN channel with and without fading when they participate in a non-cooperative zero-sum game, with the channel's input/output mutual information as the objective function. We assume that the jammer can eavesdrop the channel and can use the information obtai... | {
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cs/0601113 | An Efficient Pseudo-Codeword Search Algorithm for Linear Programming
Decoding of LDPC Codes | [
"cs.IT",
"cond-mat.dis-nn",
"math.IT"
] | In Linear Programming (LP) decoding of a Low-Density-Parity-Check (LDPC) code one minimizes a linear functional, with coefficients related to log-likelihood ratios, over a relaxation of the polytope spanned by the codewords \cite{03FWK}. In order to quantify LP decoding, and thus to describe performance of the error-co... | {
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cs/0601114 | Efficient Query Answering over Conceptual Schemas of Relational
Databases : Technical Report | [
"cs.DB",
"cs.LO"
] | We develop a query answering system, where at the core of the work there is an idea of query answering by rewriting. For this purpose we extend the DL DL-Lite with the ability to support n-ary relations, obtaining the DL DLR-Lite, which is still polynomial in the size of the data. We devise a flexible way of mapping th... | {
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cs/0601115 | Decision Making with Side Information and Unbounded Loss Functions | [
"cs.LG",
"cs.IT",
"math.IT"
] | We consider the problem of decision-making with side information and unbounded loss functions. Inspired by probably approximately correct learning model, we use a slightly different model that incorporates the notion of side information in a more generic form to make it applicable to a broader class of applications inc... | {
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cs/0601120 | On The Minimum Mean-Square Estimation Error of the Normalized Sum of
Independent Narrowband Waves in the Gaussian Channel | [
"cs.IT",
"math.IT"
] | The minimum mean-square error of the estimation of a signal where observed from the additive white Gaussian noise (WGN) channel's output, is analyzed. It is assumed that the channel input's signal is composed of a (normalized) sum of N narrowband, mutually independent waves. It is shown that if N goes to infinity, then... | {
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cs/0601121 | A Multi-Relational Network to Support the Scholarly Communication
Process | [
"cs.DL",
"cs.AI",
"cs.IR"
] | The general pupose of the scholarly communication process is to support the creation and dissemination of ideas within the scientific community. At a finer granularity, there exists multiple stages which, when confronted by a member of the community, have different requirements and therefore different solutions. In ord... | {
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cs/0601123 | Low density codes achieve the rate-distortion bound | [
"cs.IT",
"math.IT"
] | We propose a new construction for low-density source codes with multiple parameters that can be tuned to optimize the performance of the code. In addition, we introduce a set of analysis techniques for deriving upper bounds for the expected distortion of our construction, as well as more general low-density constructio... | {
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cs/0601124 | Power Control for User Cooperation | [
"cs.IT",
"math.IT"
] | For a fading Gaussian multiple access channel with user cooperation, we obtain the optimal power allocation policies that maximize the rates achievable by block Markov superposition coding. The optimal policies result in a coding scheme that is simpler than the one for a general multiple access channel with generalized... | {
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cs/0601126 | Approximate Linear Time ML Decoding on Tail-Biting Trellises in Two
Rounds | [
"cs.IT",
"math.IT"
] | A linear time approximate maximum likelihood decoding algorithm on tail-biting trellises is prsented, that requires exactly two rounds on the trellis. This is an adaptation of an algorithm proposed earlier with the advantage that it reduces the time complexity from O(mlogm) to O(m) where m is the number of nodes in the... | {
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cs/0601129 | Instantaneously Trained Neural Networks | [
"cs.NE",
"cs.AI"
] | This paper presents a review of instantaneously trained neural networks (ITNNs). These networks trade learning time for size and, in the basic model, a new hidden node is created for each training sample. Various versions of the corner-classification family of ITNNs, which have found applications in artificial intellig... | {
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cs/0601130 | From Dumb Wireless Sensors to Smart Networks using Network Coding | [
"cs.IT",
"cs.NI",
"math.IT"
] | The vision of wireless sensor networks is one of a smart collection of tiny, dumb devices. These motes may be individually cheap, unintelligent, imprecise, and unreliable. Yet they are able to derive strength from numbers, rendering the whole to be strong, reliable and robust. Our approach is to adopt a distributed and... | {
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cs/0601131 | Scalable Algorithms for Aggregating Disparate Forecasts of Probability | [
"cs.AI",
"cs.DC",
"cs.IT",
"math.IT"
] | In this paper, computational aspects of the panel aggregation problem are addressed. Motivated primarily by applications of risk assessment, an algorithm is developed for aggregating large corpora of internally incoherent probability assessments. The algorithm is characterized by a provable performance guarantee, and i... | {
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cs/0601132 | A Study on the Global Convergence Time Complexity of Estimation of
Distribution Algorithms | [
"cs.AI",
"cs.NE"
] | The Estimation of Distribution Algorithm is a new class of population based search methods in that a probabilistic model of individuals is estimated based on the high quality individuals and used to generate the new individuals. In this paper we compute 1) some upper bounds on the number of iterations required for glob... | {
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cs/0602004 | Conjunctive Queries over Trees | [
"cs.DB",
"cs.AI",
"cs.CC",
"cs.LO"
] | We study the complexity and expressive power of conjunctive queries over unranked labeled trees represented using a variety of structure relations such as ``child'', ``descendant'', and ``following'' as well as unary relations for node labels. We establish a framework for characterizing structures representing trees fo... | {
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cs/0602006 | A Visual Query Language for Complex-Value Databases | [
"cs.DB",
"cs.HC"
] | In this paper, a visual language, VCP, for queries on complex-value databases is proposed. The main strength of the new language is that it is purely visual: (i) It has no notion of variable, quantification, partiality, join, pattern matching, regular expression, recursion, or any other construct proper to logical, fun... | {
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cs/0602007 | Fuzzy Extractors: How to Generate Strong Keys from Biometrics and Other
Noisy Data | [
"cs.CR",
"cs.IT",
"math.IT"
] | We provide formal definitions and efficient secure techniques for - turning noisy information into keys usable for any cryptographic application, and, in particular, - reliably and securely authenticating biometric data. Our techniques apply not just to biometric information, but to any keying material that, unli... | {
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cs/0602011 | The intuitionistic fragment of computability logic at the propositional
level | [
"cs.LO",
"cs.AI",
"math.LO"
] | This paper presents a soundness and completeness proof for propositional intuitionistic calculus with respect to the semantics of computability logic. The latter interprets formulas as interactive computational problems, formalized as games between a machine and its environment. Intuitionistic implication is understood... | {
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cs/0602014 | Game theoretic aspects of distributed spectral coordination with
application to DSL networks | [
"cs.IT",
"math.IT"
] | In this paper we use game theoretic techniques to study the value of cooperation in distributed spectrum management problems. We show that the celebrated iterative water-filling algorithm is subject to the prisoner's dilemma and therefore can lead to severe degradation of the achievable rate region in an interference c... | {
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cs/0602015 | On the Asymptotic Performance of Multiple Antenna Channels with Fast
Channel Feedback | [
"cs.IT",
"math.IT"
] | In this paper, we analyze the asymptotic performance of multiple antenna channels where the transmitter has either perfect or finite bit channel state information. Using the diversity-multiplexing tradeoff to characterize the system performance, we demonstrate that channel feedback can fundamentally change the system b... | {
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cs/0602018 | Improving the CSIEC Project and Adapting It to the English Teaching and
Learning in China | [
"cs.CY",
"cs.AI",
"cs.CL",
"cs.HC",
"cs.MA"
] | In this paper after short review of the CSIEC project initialized by us in 2003 we present the continuing development and improvement of the CSIEC project in details, including the design of five new Microsoft agent characters representing different virtual chatting partners and the limitation of simulated dialogs in s... | {
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cs/0602020 | Inter-Block Permuted Turbo Codes | [
"cs.IT",
"math.IT"
] | The structure and size of the interleaver used in a turbo code critically affect the distance spectrum and the covariance property of a component decoder's information input and soft output. This paper introduces a new class of interleavers, the inter-block permutation (IBP) interleavers, that can be build on any exist... | {
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cs/0602021 | Using Domain Knowledge in Evolutionary System Identification | [
"cs.AI",
"math.AP"
] | Two example of Evolutionary System Identification are presented to highlight the importance of incorporating Domain Knowledge: the discovery of an analytical indentation law in Structural Mechanics using constrained Genetic Programming, and the identification of the repartition of underground velocities in Seismic Pros... | {
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cs/0602022 | Avoiding the Bloat with Stochastic Grammar-based Genetic Programming | [
"cs.AI"
] | The application of Genetic Programming to the discovery of empirical laws is often impaired by the huge size of the search space, and consequently by the computer resources needed. In many cases, the extreme demand for memory and CPU is due to the massive growth of non-coding segments, the introns. The paper presents a... | {
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cs/0602023 | Information theory and Thermodynamics | [
"cs.IT",
"math.IT"
] | A communication theory for a transmitter broadcasting to many receivers is presented. In this case energetic considerations cannot be neglected as in Shannon theory. It is shown that, when energy is assigned to the information bit, information theory complies with classical thermodynamic and is part of it. To provide a... | {
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cs/0602027 | Explaining Constraint Programming | [
"cs.PL",
"cs.AI"
] | We discuss here constraint programming (CP) by using a proof-theoretic perspective. To this end we identify three levels of abstraction. Each level sheds light on the essence of CP. In particular, the highest level allows us to bring CP closer to the computation as deduction paradigm. At the middle level we can expla... | {
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cs/0602028 | Analysis of Belief Propagation for Non-Linear Problems: The Example of
CDMA (or: How to Prove Tanaka's Formula) | [
"cs.IT",
"math.IT"
] | We consider the CDMA (code-division multiple-access) multi-user detection problem for binary signals and additive white gaussian noise. We propose a spreading sequences scheme based on random sparse signatures, and a detection algorithm based on belief propagation (BP) with linear time complexity. In the new scheme, ea... | {
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cs/0602030 | Single-Symbol Maximum Likelihood Decodable Linear STBCs | [
"cs.IT",
"math.IT"
] | Space-Time block codes (STBC) from Orthogonal Designs (OD) and Co-ordinate Interleaved Orthogonal Designs (CIOD) have been attracting wider attention due to their amenability for fast (single-symbol) ML decoding, and full-rate with full-rank over quasi-static fading channels. However, these codes are instances of singl... | {
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cs/0602031 | Classifying Signals with Local Classifiers | [
"cs.AI"
] | This paper deals with the problem of classifying signals. The new method for building so called local classifiers and local features is presented. The method is a combination of the lifting scheme and the support vector machines. Its main aim is to produce effective and yet comprehensible classifiers that would help in... | {
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cs/0602032 | Finite-State Dimension and Real Arithmetic | [
"cs.CC",
"cs.IT",
"math.IT"
] | We use entropy rates and Schur concavity to prove that, for every integer k >= 2, every nonzero rational number q, and every real number alpha, the base-k expansions of alpha, q+alpha, and q*alpha all have the same finite-state dimension and the same finite-state strong dimension. This extends, and gives a new proof of... | {
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cs/0602035 | n-Channel Entropy-Constrained Multiple-Description Lattice Vector
Quantization | [
"cs.IT",
"math.IT"
] | In this paper we derive analytical expressions for the central and side quantizers which, under high-resolutions assumptions, minimize the expected distortion of a symmetric multiple-description lattice vector quantization (MD-LVQ) system subject to entropy constraints on the side descriptions for given packet-loss pro... | {
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cs/0602036 | R\'{e}seaux d'Automates de Caianiello Revisit\'{e} | [
"cs.NE"
] | We exhibit a family of neural networks of McCulloch and Pitts of size $2nk+2$ which can be simulated by a neural networks of Caianiello of size $2n+2$ and memory length $k$. This simulation allows us to find again one of the result of the following article: [Cycles exponentiels des r\'{e}seaux de Caianiello et compteur... | {
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cs/0602038 | Minimum Cost Homomorphisms to Proper Interval Graphs and Bigraphs | [
"cs.DM",
"cs.AI"
] | For graphs $G$ and $H$, a mapping $f: V(G)\dom V(H)$ is a homomorphism of $G$ to $H$ if $uv\in E(G)$ implies $f(u)f(v)\in E(H).$ If, moreover, each vertex $u \in V(G)$ is associated with costs $c_i(u), i \in V(H)$, then the cost of the homomorphism $f$ is $\sum_{u\in V(G)}c_{f(u)}(u)$. For each fixed graph $H$, we have... | {
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cs/0602039 | Path Summaries and Path Partitioning in Modern XML Databases | [
"cs.DB"
] | We study the applicability of XML path summaries in the context of current-day XML databases. We find that summaries provide an excellent basis for optimizing data access methods, which furthermore mixes very well with path-partitioned stores. We provide practical algorithms for building and exploiting summaries, and p... | {
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cs/0602044 | Multilevel Thresholding for Image Segmentation through a Fast
Statistical Recursive Algorithm | [
"cs.CV"
] | A novel algorithm is proposed for segmenting an image into multiple levels using its mean and variance. Starting from the extreme pixel values at both ends of the histogram plot, the algorithm is applied recursively on sub-ranges computed from the previous step, so as to find a threshold level and a new sub-range for t... | {
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cs/0602045 | Emergence Explained | [
"cs.MA",
"cs.DC",
"cs.GL"
] | Emergence (macro-level effects from micro-level causes) is at the heart of the conflict between reductionism and functionalism. How can there be autonomous higher level laws of nature (the functionalist claim) if everything can be reduced to the fundamental forces of physics (the reductionist position)? We cut through ... | {
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cs/0602046 | Analysis of LDGM and compound codes for lossy compression and binning | [
"cs.IT",
"math.IT"
] | Recent work has suggested that low-density generator matrix (LDGM) codes are likely to be effective for lossy source coding problems. We derive rigorous upper bounds on the effective rate-distortion function of LDGM codes for the binary symmetric source, showing that they quickly approach the rate-distortion function a... | {
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cs/0602048 | On the Optimality of the ARQ-DDF Protocol | [
"cs.IT",
"math.IT"
] | The performance of the automatic repeat request-dynamic decode and forward (ARQ-DDF) cooperation protocol is analyzed in two distinct scenarios. The first scenario is the multiple access relay (MAR) channel where a single relay is dedicated to simultaneously help several multiple access users. For this setup, it is sho... | {
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cs/0602049 | Cooperative Lattice Coding and Decoding | [
"cs.IT",
"math.IT"
] | A novel lattice coding framework is proposed for outage-limited cooperative channels. This framework provides practical implementations for the optimal cooperation protocols proposed by Azarian et al. In particular, for the relay channel we implement a variant of the dynamic decode and forward protocol, which uses orth... | {
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cs/0602050 | Outage Capacity of the Fading Relay Channel in the Low SNR Regime | [
"cs.IT",
"math.IT"
] | In slow fading scenarios, cooperation between nodes can increase the amount of diversity for communication. We study the performance limit in such scenarios by analyzing the outage capacity of slow fading relay channels. Our focus is on the low SNR and low outage probability regime, where the adverse impact of fading i... | {
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cs/0602051 | On the utility of the multimodal problem generator for assessing the
performance of Evolutionary Algorithms | [
"cs.NE"
] | This paper looks in detail at how an evolutionary algorithm attempts to solve instances from the multimodal problem generator. The paper shows that in order to consistently reach the global optimum, an evolutionary algorithm requires a population size that should grow at least linearly with the number of peaks. It is a... | {
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cs/0602052 | The OverRelational Manifesto | [
"cs.DB",
"cs.DS"
] | The OverRelational Manifesto (below ORM) proposes a possible approach to creation of data storage systems of the next generation. ORM starts from the requirement that information in a relational database is represented by a set of relation values. Accordingly, it is assumed that the information about any entity of an e... | {
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cs/0602053 | How to Beat the Adaptive Multi-Armed Bandit | [
"cs.DS",
"cs.LG"
] | The multi-armed bandit is a concise model for the problem of iterated decision-making under uncertainty. In each round, a gambler must pull one of $K$ arms of a slot machine, without any foreknowledge of their payouts, except that they are uniformly bounded. A standard objective is to minimize the gambler's regret, def... | {
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cs/0602054 | Explicit Space-Time Codes Achieving The Diversity-Multiplexing Gain
Tradeoff | [
"cs.IT",
"math.IT"
] | A recent result of Zheng and Tse states that over a quasi-static channel, there exists a fundamental tradeoff, referred to as the diversity-multiplexing gain (D-MG) tradeoff, between the spatial multiplexing gain and the diversity gain that can be simultaneously achieved by a space-time (ST) block code. This tradeoff i... | {
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cs/0602055 | Revisiting Evolutionary Algorithms with On-the-Fly Population Size
Adjustment | [
"cs.NE"
] | In an evolutionary algorithm, the population has a very important role as its size has direct implications regarding solution quality, speed, and reliability. Theoretical studies have been done in the past to investigate the role of population sizing in evolutionary algorithms. In addition to those studies, several sel... | {
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cs/0602056 | Building Scenarios for Environmental Management and Planning: An
IT-Based Approach | [
"cs.MA"
] | Oftentimes, the need to build multidiscipline knowledge bases, oriented to policy scenarios, entails the involvement of stakeholders in manifold domains, with a juxtaposition of different languages whose semantics can hardly allow inter-domain transfers. A useful support for planning is the building up of durable IT ba... | {
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cs/0602058 | Incremental Redundancy Cooperative Coding for Wireless Networks:
Cooperative Diversity, Coding, and Transmission Energy Gain | [
"cs.IT",
"math.IT"
] | We study an incremental redundancy (IR) cooperative coding scheme for wireless networks. To exploit the spatial diversity benefit we propose a cluster-based collaborating strategy for a quasi-static Rayleigh fading channel model and based on a network geometric distance profile. Our scheme enhances the network performa... | {
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cs/0602060 | eJournal interface can influence usage statistics: implications for
libraries, publishers, and Project COUNTER | [
"cs.IR",
"cs.DL"
] | The design of a publisher's electronic interface can have a measurable effect on electronic journal usage statistics. A study of journal usage from six COUNTER-compliant publishers at thirty-two research institutions in the United States, the United Kingdom and Sweden indicates that the ratio of PDF to HTML views is no... | {
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cs/0602062 | Learning rational stochastic languages | [
"cs.LG"
] | Given a finite set of words w1,...,wn independently drawn according to a fixed unknown distribution law P called a stochastic language, an usual goal in Grammatical Inference is to infer an estimate of P in some class of probabilistic models, such as Probabilistic Automata (PA). Here, we study the class of rational sto... | {
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cs/0602065 | Similarity of Objects and the Meaning of Words | [
"cs.CV",
"cs.IR"
] | We survey the emerging area of compression-based, parameter-free, similarity distance measures useful in data-mining, pattern recognition, learning and automatic semantics extraction. Given a family of distances on a set of objects, a distance is universal up to a certain precision for that family if it minorizes every... | {
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cs/0602067 | Renyi to Renyi -- Source Coding under Siege | [
"cs.IT",
"cs.DS",
"math.IT"
] | A novel lossless source coding paradigm applies to problems of unreliable lossless channels with low bit rates, in which a vital message needs to be transmitted prior to termination of communications. This paradigm can be applied to Alfred Renyi's secondhand account of an ancient siege in which a spy was sent to scout ... | {
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cs/0602071 | Geographic Gossip: Efficient Aggregation for Sensor Networks | [
"cs.IT",
"math.IT"
] | Gossip algorithms for aggregation have recently received significant attention for sensor network applications because of their simplicity and robustness in noisy and uncertain environments. However, gossip algorithms can waste significant energy by essentially passing around redundant information multiple times. For r... | {
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cs/0602072 | Turbo Decoding on the Binary Erasure Channel: Finite-Length Analysis and
Turbo Stopping Sets | [
"cs.IT",
"math.IT"
] | This paper is devoted to the finite-length analysis of turbo decoding over the binary erasure channel (BEC). The performance of iterative belief-propagation (BP) decoding of low-density parity-check (LDPC) codes over the BEC can be characterized in terms of stopping sets. We describe turbo decoding on the BEC which is ... | {
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cs/0602074 | The entropy rate of the binary symmetric channel in the rare transitions
regime | [
"cs.IT",
"math.IT"
] | This note has been withdrawn by the author as the more complete result was recently proved by A.Quas and Y.Peres | {
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cs/0602076 | Exploring term-document matrices from matrix models in text mining | [
"cs.IR",
"cs.DB",
"cs.DL"
] | We explore a matrix-space model, that is a natural extension to the vector space model for Information Retrieval. Each document can be represented by a matrix that is based on document extracts (e.g. sentences, paragraphs, sections). We focus on the performance of this model for the specific case in which documents are... | {
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cs/0602079 | SISO APP Searches in Lattices with Tanner Graphs | [
"cs.IT",
"cs.DS",
"math.IT"
] | An efficient, low-complexity, soft-output detector for general lattices is presented, based on their Tanner graph (TG) representations. Closest-point searches in lattices can be performed as non-binary belief propagation on associated TGs; soft-information output is naturally generated in the process; the algorithm req... | {
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"cs.SY": 0
} |
cs/0602081 | Low-Density Parity-Check Code with Fast Decoding Speed | [
"cs.IT",
"math.IT"
] | Low-Density Parity-Check (LDPC) codes received much attention recently due to their capacity-approaching performance. The iterative message-passing algorithm is a widely adopted decoding algorithm for LDPC codes \cite{Kschischang01}. An important design issue for LDPC codes is designing codes with fast decoding speed w... | {
"Other": 0,
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} |
cs/0602083 | A third level trigger programmable on FPGA for the gamma/hadron
separation in a Cherenkov telescope using pseudo-Zernike moments and the SVM
classifier | [
"cs.CV",
"cs.AI"
] | We studied the application of the Pseudo-Zernike features as image parameters (instead of the Hillas parameters) for the discrimination between the images produced by atmospheric electromagnetic showers caused by gamma-rays and the ones produced by atmospheric electromagnetic showers caused by hadrons in the MAGIC Expe... | {
"Other": 0,
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} |
cs/0602084 | Universal Codes as a Basis for Time Series Testing | [
"cs.IT",
"math.IT"
] | We suggest a new approach to hypothesis testing for ergodic and stationary processes. In contrast to standard methods, the suggested approach gives a possibility to make tests, based on any lossless data compression method even if the distribution law of the codeword lengths is not known. We apply this approach to the ... | {
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} |
cs/0602085 | Twenty (or so) Questions: $D$-ary Length-Bounded Prefix Coding | [
"cs.IT",
"cs.DS",
"math.IT"
] | Efficient optimal prefix coding has long been accomplished via the Huffman algorithm. However, there is still room for improvement and exploration regarding variants of the Huffman problem. Length-limited Huffman coding, useful for many practical applications, is one such variant, for which codes are restricted to the ... | {
"Other": 1,
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} |
cs/0602086 | On the Block Error Probability of LP Decoding of LDPC Codes | [
"cs.IT",
"math.IT"
] | In his thesis, Wiberg showed the existence of thresholds for families of regular low-density parity-check codes under min-sum algorithm decoding. He also derived analytic bounds on these thresholds. In this paper, we formulate similar results for linear programming decoding of regular low-density parity-check codes. | {
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} |
cs/0602087 | Bounds on the Threshold of Linear Programming Decoding | [
"cs.IT",
"math.IT"
] | Whereas many results are known about thresholds for ensembles of low-density parity-check codes under message-passing iterative decoding, this is not the case for linear programming decoding. Towards closing this knowledge gap, this paper presents some bounds on the thresholds of low-density parity-check code ensembles... | {
"Other": 0,
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} |
cs/0602088 | Towards Low-Complexity Linear-Programming Decoding | [
"cs.IT",
"math.IT"
] | We consider linear-programming (LP) decoding of low-density parity-check (LDPC) codes. While it is clear that one can use any general-purpose LP solver to solve the LP that appears in the decoding problem, we argue in this paper that the LP at hand is equipped with a lot of structure that one should take advantage of. ... | {
"Other": 0,
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} |
cs/0602089 | Pseudo-Codeword Analysis of Tanner Graphs from Projective and Euclidean
Planes | [
"cs.IT",
"cs.DM",
"math.IT"
] | In order to understand the performance of a code under maximum-likelihood (ML) decoding, one studies the codewords, in particular the minimal codewords, and their Hamming weights. In the context of linear programming (LP) decoding, one's attention needs to be shifted to the pseudo-codewords, in particular to the minima... | {
"Other": 1,
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} |
cs/0602091 | Feedback Capacity of Stationary Gaussian Channels | [
"cs.IT",
"math.IT"
] | The feedback capacity of additive stationary Gaussian noise channels is characterized as the solution to a variational problem. Toward this end, it is proved that the optimal feedback coding scheme is stationary. When specialized to the first-order autoregressive moving average noise spectrum, this variational characte... | {
"Other": 0,
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} |
cs/0602092 | Inconsistent parameter estimation in Markov random fields: Benefits in
the computation-limited setting | [
"cs.LG",
"cs.IT",
"math.IT",
"math.ST",
"stat.TH"
] | Consider the problem of joint parameter estimation and prediction in a Markov random field: i.e., the model parameters are estimated on the basis of an initial set of data, and then the fitted model is used to perform prediction (e.g., smoothing, denoising, interpolation) on a new noisy observation. Working under the r... | {
"Other": 0,
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"cs.SI": 0,
"cs.SY": 0
} |
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