id stringlengths 9 16 | title stringlengths 4 278 | categories listlengths 1 13 | abstract stringlengths 3 4.08k | filtered_category_membership dict |
|---|---|---|---|---|
0704.3405 | Estimation Diversity and Energy Efficiency in Distributed Sensing | [
"cs.IT",
"math.IT"
] | Distributed estimation based on measurements from multiple wireless sensors is investigated. It is assumed that a group of sensors observe the same quantity in independent additive observation noises with possibly different variances. The observations are transmitted using amplify-and-forward (analog) transmissions ove... | {
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0704.3408 | The Trade-off between Processing Gains of an Impulse Radio UWB System in
the Presence of Timing Jitter | [
"cs.IT",
"math.IT"
] | In time hopping impulse radio, $N_f$ pulses of duration $T_c$ are transmitted for each information symbol. This gives rise to two types of processing gain: (i) pulse combining gain, which is a factor $N_f$, and (ii) pulse spreading gain, which is $N_c=T_f/T_c$, where $T_f$ is the mean interval between two subsequent pu... | {
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0704.3433 | Bayesian approach to rough set | [
"cs.AI"
] | This paper proposes an approach to training rough set models using Bayesian framework trained using Markov Chain Monte Carlo (MCMC) method. The prior probabilities are constructed from the prior knowledge that good rough set models have fewer rules. Markov Chain Monte Carlo sampling is conducted through sampling in the... | {
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0704.3434 | On sensing capacity of sensor networks for the class of linear
observation, fixed SNR models | [
"cs.IT",
"math.IT"
] | In this paper we address the problem of finding the sensing capacity of sensor networks for a class of linear observation models and a fixed SNR regime. Sensing capacity is defined as the maximum number of signal dimensions reliably identified per sensor observation. In this context sparsity of the phenomena is a key f... | {
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0704.3453 | An Adaptive Strategy for the Classification of G-Protein Coupled
Receptors | [
"cs.AI",
"q-bio.QM"
] | One of the major problems in computational biology is the inability of existing classification models to incorporate expanding and new domain knowledge. This problem of static classification models is addressed in this paper by the introduction of incremental learning for problems in bioinformatics. Many machine learni... | {
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0704.3500 | Une plate-forme dynamique pour l'\'evaluation des performances des bases
de donn\'ees \`a objets | [
"cs.DB"
] | In object-oriented or object-relational databases such as multimedia databases or most XML databases, access patterns are not static, i.e., applications do not always access the same objects in the same order repeatedly. However, this has been the way these databases and associated optimisation techniques such as clust... | {
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0704.3501 | Conception d'un banc d'essais d\'ecisionnel | [
"cs.DB"
] | We present in this paper a new benchmark for evaluating the performances of data warehouses. Benchmarking is useful either to system users for comparing the performances of different systems, or to system engineers for testing the effect of various design choices. While the TPC (Transaction Processing Performance Counc... | {
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0704.3504 | Smooth R\'enyi Entropy of Ergodic Quantum Information Sources | [
"quant-ph",
"cs.IT",
"math.IT"
] | We prove that the average smooth Renyi entropy rate will approach the entropy rate of a stationary, ergodic information source, which is equal to the Shannon entropy rate for a classical information source and the von Neumann entropy rate for a quantum information source. | {
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0704.3515 | Comparing Robustness of Pairwise and Multiclass Neural-Network Systems
for Face Recognition | [
"cs.AI"
] | Noise, corruptions and variations in face images can seriously hurt the performance of face recognition systems. To make such systems robust, multiclass neuralnetwork classifiers capable of learning from noisy data have been suggested. However on large face data sets such systems cannot provide the robustness at a high... | {
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0704.3520 | Vers l'auto-administration des entrep\^ots de donn\'ees | [
"cs.DB"
] | With the wide development of databases in general and data warehouses in particular, it is important to reduce the tasks that a database administrator must perform manually. The idea of using data mining techniques to extract useful knowledge for administration from the data themselves has existed for some years. Howev... | {
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0704.3536 | $\delta$-sequences and Evaluation Codes defined by Plane Valuations at
Infinity | [
"cs.IT",
"math.IT"
] | We introduce the concept of $\delta$-sequence. A $\delta$-sequence $\Delta$ generates a well-ordered semigroup $S$ in $\mathbb{Z}^2$ or $\mathbb{R}$. We show how to construct (and compute parameters) for the dual code of any evaluation code associated with a weight function defined by $\Delta$ from the polynomial ring ... | {
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0704.3588 | On Energy Efficient Hierarchical Cross-Layer Design: Joint Power Control
and Routing for Ad Hoc Networks | [
"cs.IT",
"math.IT"
] | In this paper, a hierarchical cross-layer design approach is proposed to increase energy efficiency in ad hoc networks through joint adaptation of nodes' transmitting powers and route selection. The design maintains the advantages of the classic OSI model, while accounting for the cross-coupling between layers, through... | {
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0704.3591 | Capacity of a Class of Modulo-Sum Relay Channels | [
"cs.IT",
"math.IT"
] | This paper characterizes the capacity of a class of modulo additive noise relay channels, in which the relay observes a corrupted version of the noise and has a separate channel to the destination. The capacity is shown to be strictly below the cut-set bound in general and achievable using a quantize-and-forward strate... | {
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0704.3635 | Rough Sets Computations to Impute Missing Data | [
"cs.CV",
"cs.IR"
] | Many techniques for handling missing data have been proposed in the literature. Most of these techniques are overly complex. This paper explores an imputation technique based on rough set computations. In this paper, characteristic relations are introduced to describe incompletely specified decision tables.It is shown ... | {
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0704.3644 | Capacity Gain from Two-Transmitter and Two-Receiver Cooperation | [
"cs.IT",
"math.IT"
] | Capacity improvement from transmitter and receiver cooperation is investigated in a two-transmitter, two-receiver network with phase fading and full channel state information available at all terminals. The transmitters cooperate by first exchanging messages over an orthogonal transmitter cooperation channel, then enco... | {
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0704.3662 | An Automated Evaluation Metric for Chinese Text Entry | [
"cs.HC",
"cs.CL"
] | In this paper, we propose an automated evaluation metric for text entry. We also consider possible improvements to existing text entry evaluation metrics, such as the minimum string distance error rate, keystrokes per character, cost per correction, and a unified approach proposed by MacKenzie, so they can accommodate ... | {
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0704.3665 | On the Development of Text Input Method - Lessons Learned | [
"cs.CL",
"cs.HC"
] | Intelligent Input Methods (IM) are essential for making text entries in many East Asian scripts, but their application to other languages has not been fully explored. This paper discusses how such tools can contribute to the development of computer processing of other oriental languages. We propose a design philosophy ... | {
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0704.3708 | Network statistics on early English Syntax: Structural criteria | [
"cs.CL"
] | This paper includes a reflection on the role of networks in the study of English language acquisition, as well as a collection of practical criteria to annotate free-speech corpora from children utterances. At the theoretical level, the main claim of this paper is that syntactic networks should be interpreted as the ou... | {
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0704.3780 | Stochastic Optimization Algorithms | [
"cs.NE"
] | When looking for a solution, deterministic methods have the enormous advantage that they do find global optima. Unfortunately, they are very CPU-intensive, and are useless on untractable NP-hard problems that would require thousands of years for cutting-edge computers to explore. In order to get a result, one needs to ... | {
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0704.3878 | A Game-Theoretic Approach to Energy-Efficient Modulation in CDMA
Networks with Delay Constraints | [
"cs.IT",
"cs.GT",
"math.IT"
] | A game-theoretic framework is used to study the effect of constellation size on the energy efficiency of wireless networks for M-QAM modulation. A non-cooperative game is proposed in which each user seeks to choose its transmit power (and possibly transmit symbol rate) as well as the constellation size in order to maxi... | {
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0704.3880 | Energy-Efficient Resource Allocation in Wireless Networks with
Quality-of-Service Constraints | [
"cs.IT",
"math.IT"
] | A game-theoretic model is proposed to study the cross-layer problem of joint power and rate control with quality of service (QoS) constraints in multiple-access networks. In the proposed game, each user seeks to choose its transmit power and rate in a distributed manner in order to maximize its own utility while satisf... | {
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0704.3881 | A Unified Approach to Energy-Efficient Power Control in Large CDMA
Systems | [
"cs.IT",
"math.IT"
] | A unified approach to energy-efficient power control is proposed for code-division multiple access (CDMA) networks. The approach is applicable to a large family of multiuser receivers including the matched filter, the decorrelator, the linear minimum mean-square error (MMSE) receiver, and the (nonlinear) optimal detect... | {
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0704.3886 | A Note on Ontology and Ordinary Language | [
"cs.AI",
"cs.CL"
] | We argue for a compositional semantics grounded in a strongly typed ontology that reflects our commonsense view of the world and the way we talk about it. Assuming such a structure we show that the semantics of various natural language phenomena may become nearly trivial. | {
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0704.3905 | Ensemble Learning for Free with Evolutionary Algorithms ? | [
"cs.AI"
] | Evolutionary Learning proceeds by evolving a population of classifiers, from which it generally returns (with some notable exceptions) the single best-of-run classifier as final result. In the meanwhile, Ensemble Learning, one of the most efficient approaches in supervised Machine Learning for the last decade, proceeds... | {
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0704.3969 | Diversity of MIMO Multihop Relay Channels - Part I: Amplify-and-Forward | [
"cs.IT",
"math.IT"
] | In this two-part paper, we consider the multiantenna multihop relay channels in which the source signal arrives at the destination through N independent relaying hops in series. The main concern of this work is to design relaying strategies that utilize efficiently the relays in such a way that the diversity is maximiz... | {
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0705.0025 | Can the Internet cope with stress? | [
"cs.HC",
"cs.AI"
] | When will the Internet become aware of itself? In this note the problem is approached by asking an alternative question: Can the Internet cope with stress? By extrapolating the psychological difference between coping and defense mechanisms a distributed software experiment is outlined which could reject the hypothesis ... | {
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0705.0043 | Joint Detection and Identification of an Unobservable Change in the
Distribution of a Random Sequence | [
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"math.IT"
] | This paper examines the joint problem of detection and identification of a sudden and unobservable change in the probability distribution function (pdf) of a sequence of independent and identically distributed (i.i.d.) random variables to one of finitely many alternative pdf's. The objective is quick detection of the c... | {
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0705.0044 | Reliable Memories Built from Unreliable Components Based on Expander
Graphs | [
"cs.IT",
"math.IT"
] | In this paper, memories built from components subject to transient faults are considered. A fault-tolerant memory architecture based on low-density parity-check codes is proposed and the existence of reliable memories for the adversarial failure model is proved. The proof relies on the expansion property of the underly... | {
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0705.0081 | Constructions of q-Ary Constant-Weight Codes | [
"cs.IT",
"math.IT"
] | This paper introduces a new combinatorial construction for q-ary constant-weight codes which yields several families of optimal codes and asymptotically optimal codes. The construction reveals intimate connection between q-ary constant-weight codes and sets of pairwise disjoint combinatorial designs of various types. | {
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0705.0085 | An efficient centralized binary multicast network coding algorithm for
any cyclic network | [
"cs.IT",
"math.IT"
] | We give an algorithm for finding network encoding and decoding equations for error-free multicasting networks with multiple sources and sinks. The algorithm given is efficient (polynomial complexity) and works on any kind of network (acyclic, link cyclic, flow cyclic, or even in the presence of knots). The key idea wil... | {
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0705.0123 | An Energy Efficiency Perspective on Training for Fading Channels | [
"cs.IT",
"math.IT"
] | In this paper, the bit energy requirements of training-based transmission over block Rayleigh fading channels are studied. Pilot signals are employed to obtain the minimum mean-square-error (MMSE) estimate of the channel fading coefficients. Energy efficiency is analyzed in the worst case scenario where the channel est... | {
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0705.0124 | On the Low-SNR Capacity of Phase-Shift Keying with Hard-Decision
Detection | [
"cs.IT",
"math.IT"
] | The low-snr capacity of M-ary PSK transmission over both the additive white Gaussian noise (AWGN) and fading channels is analyzed when hard-decision detection is employed at the receiver. Closed-form expressions for the first and second derivatives of the capacity at zero snr are obtained. The spectral-efficiency/bit-e... | {
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0705.0128 | Training Optimization for Gauss-Markov Rayleigh Fading Channels | [
"cs.IT",
"math.IT"
] | In this paper, pilot-assisted transmission over Gauss-Markov Rayleigh fading channels is considered. A simple scenario, where a single pilot signal is transmitted every T symbols and T-1 data symbols are transmitted in between the pilots, is studied. First, it is assumed that binary phase-shift keying (BPSK) modulation... | {
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0705.0130 | Performance Analysis for Multichannel Reception of OOFSK Signaling | [
"cs.IT",
"math.IT"
] | In this paper, the error performance of on-off frequency shift keying (OOFSK) modulation over fading channels is analyzed when the receiver is equipped with multiple antennas. The analysis is conducted in two cases: the coherent scenario where the fading is perfectly known at the receiver, and the noncoherent scenario ... | {
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0705.0132 | Error Probability Analysis of Peaky Signaling over Fading Channels | [
"cs.IT",
"math.IT"
] | In this paper, the performance of signaling strategies with high peak-to-average power ratio is analyzed in both coherent and noncoherent fading channels. Two recently proposed modulation schemes, namely on-off binary phase-shift keying and on-off quaternary phase-shift keying, are considered. For these modulation form... | {
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0705.0150 | Comparison of Discrete and Continuous Wavelet Transforms | [
"cs.CE"
] | In this paper we outline several points of view on the interplay between discrete and continuous wavelet transforms; stressing both pure and applied aspects of both. We outline some new links between the two transform technologies based on the theory of representations of generators and relations. By this we mean a fin... | {
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0705.0197 | Fault Classification in Cylinders Using Multilayer Perceptrons, Support
Vector Machines and Guassian Mixture Models | [
"cs.AI"
] | Gaussian mixture models (GMM) and support vector machines (SVM) are introduced to classify faults in a population of cylindrical shells. The proposed procedures are tested on a population of 20 cylindrical shells and their performance is compared to the procedure, which uses multi-layer perceptrons (MLP). The modal pro... | {
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0705.0199 | The Parameter-Less Self-Organizing Map algorithm | [
"cs.NE",
"cs.AI",
"cs.CV"
] | The Parameter-Less Self-Organizing Map (PLSOM) is a new neural network algorithm based on the Self-Organizing Map (SOM). It eliminates the need for a learning rate and annealing schemes for learning rate and neighbourhood size. We discuss the relative performance of the PLSOM and the SOM and demonstrate some tasks in w... | {
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0705.0214 | Riemannian level-set methods for tensor-valued data | [
"cs.CV"
] | We present a novel approach for the derivation of PDE modeling curvature-driven flows for matrix-valued data. This approach is based on the Riemannian geometry of the manifold of Symmetric Positive Definite Matrices Pos(n). | {
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0705.0252 | Power Allocation for Discrete-Input Non-Ergodic Block-Fading Channels | [
"cs.IT",
"math.IT"
] | We consider power allocation algorithms for fixed-rate transmission over Nakagami-m non-ergodic block-fading channels with perfect transmitter and receiver channel state information and discrete input signal constellations under both short- and long-term power constraints. Optimal power allocation schemes are shown to ... | {
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0705.0253 | More Efficient Algorithms and Analyses for Unequal Letter Cost
Prefix-Free Coding | [
"cs.IT",
"cs.DS",
"math.IT"
] | There is a large literature devoted to the problem of finding an optimal (min-cost) prefix-free code with an unequal letter-cost encoding alphabet of size. While there is no known polynomial time algorithm for solving it optimally there are many good heuristics that all provide additive errors to optimal. The additive ... | {
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0705.0281 | Dynamic Clustering in Object-Oriented Databases: An Advocacy for
Simplicity | [
"cs.DB"
] | We present in this paper three dynamic clustering techniques for Object-Oriented Databases (OODBs). The first two, Dynamic, Statistical & Tunable Clustering (DSTC) and StatClust, exploit both comprehensive usage statistics and the inter-object reference graph. They are quite elaborate. However, they are also complex to... | {
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0705.0286 | Inverse-free Berlekamp-Massey-Sakata Algorithm and Small Decoders for
Algebraic-Geometric Codes | [
"cs.IT",
"math.IT"
] | This paper proposes a novel algorithm for finding error-locators of algebraic-geometric codes that can eliminate the division-calculations of finite fields from the Berlekamp-Massey-Sakata algorithm. This inverse-free algorithm provides full performance in correcting a certain class of errors, generic errors, which inc... | {
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0705.0326 | Optimal Delay-Throughput Trade-offs in Mobile Ad-Hoc Networks: Hybrid
Random Walk and One-Dimensional Mobility Models | [
"cs.NI",
"cs.IT",
"math.IT"
] | Optimal delay-throughput trade-offs for two-dimensional i.i.d mobility models have been established in [23], where we showed that the optimal trade-offs can be achieved using rate-less codes when the required delay guarantees are sufficient large. In this paper, we extend the results to other mobility models including ... | {
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0705.0423 | Encoding for the Blackwell Channel with Reinforced Belief Propagation | [
"cs.IT",
"math.IT"
] | A key idea in coding for the broadcast channel (BC) is binning, in which the transmitter encode information by selecting a codeword from an appropriate bin (the messages are thus the bin indexes). This selection is normally done by solving an appropriate (possibly difficult) combinatorial problem. Recently it has been ... | {
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0705.0449 | Multiresolution Approximation of Polygonal Curves in Linear Complexity | [
"cs.CV"
] | We propose a new algorithm to the problem of polygonal curve approximation based on a multiresolution approach. This algorithm is suboptimal but still maintains some optimality between successive levels of resolution using dynamic programming. We show theoretically and experimentally that this algorithm has a linear co... | {
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0705.0450 | VOODB: A Generic Discrete-Event Random Simulation Model to Evaluate the
Performances of OODBs | [
"cs.DB"
] | Performance of object-oriented database systems (OODBs) is still an issue to both designers and users nowadays. The aim of this paper is to propose a generic discrete-event random simulation model, called VOODB, in order to evaluate the performances of OODBs in general, and the performances of optimization methods like... | {
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0705.0453 | OCB: A Generic Benchmark to Evaluate the Performances of Object-Oriented
Database Systems | [
"cs.DB"
] | We present in this paper a generic object-oriented benchmark (the Object Clustering Benchmark) that has been designed to evaluate the performances of clustering policies in object-oriented databases. OCB is generic because its sample database may be customized to fit the databases introduced by the main existing benchm... | {
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0705.0454 | Performance Evaluation for Clustering Algorithms in Object-Oriented
Database Systems | [
"cs.DB"
] | It is widely acknowledged that good object clustering is critical to the performance of object-oriented databases. However, object clustering always involves some kind of overhead for the system. The aim of this paper is to propose a modelling methodology in order to evaluate the performances of different clustering po... | {
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0705.0462 | Resource modalities in game semantics | [
"math.CT",
"cs.CL"
] | The description of resources in game semantics has never achieved the simplicity and precision of linear logic, because of a misleading conception: the belief that linear logic is more primitive than game semantics. We advocate instead the contrary: that game semantics is conceptually more primitive than linear logic. ... | {
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0705.0543 | The Design of Efficiently-Encodable Rate-Compatible LDPC Codes | [
"cs.IT",
"math.IT"
] | We present a new class of irregular low-density parity-check (LDPC) codes for moderate block lengths (up to a few thousand bits) that are well-suited for rate-compatible puncturing. The proposed codes show good performance under puncturing over a wide range of rates and are suitable for usage in incremental redundancy ... | {
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0705.0552 | Succinct Indexable Dictionaries with Applications to Encoding $k$-ary
Trees, Prefix Sums and Multisets | [
"cs.DS",
"cs.DM",
"cs.IT",
"math.IT"
] | We consider the {\it indexable dictionary} problem, which consists of storing a set $S \subseteq \{0,...,m-1\}$ for some integer $m$, while supporting the operations of $\Rank(x)$, which returns the number of elements in $S$ that are less than $x$ if $x \in S$, and -1 otherwise; and $\Select(i)$ which returns the $i$-t... | {
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0705.0564 | Rate Bounds for MIMO Relay Channels | [
"cs.IT",
"math.IT"
] | This paper considers the multi-input multi-output (MIMO) relay channel where multiple antennas are employed by each terminal. Compared to single-input single-output (SISO) relay channels, MIMO relay channels introduce additional degrees of freedom, making the design and analysis of optimal cooperative strategies more c... | {
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0705.0588 | Clustering Co-occurrence of Maximal Frequent Patterns in Streams | [
"cs.AI",
"cs.DS"
] | One way of getting a better view of data is using frequent patterns. In this paper frequent patterns are subsets that occur a minimal number of times in a stream of itemsets. However, the discovery of frequent patterns in streams has always been problematic. Because streams are potentially endless it is in principle im... | {
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0705.0593 | Clustering with Lattices in the Analysis of Graph Patterns | [
"cs.AI",
"cs.DS"
] | Mining frequent subgraphs is an area of research where we have a given set of graphs (each graph can be seen as a transaction), and we search for (connected) subgraphs contained in many of these graphs. In this work we will discuss techniques used in our framework Lattice2SAR for mining and analysing frequent subgraph ... | {
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0705.0602 | Risk Assessment Algorithms Based On Recursive Neural Networks | [
"cs.NE"
] | The assessment of highly-risky situations at road intersections have been recently revealed as an important research topic within the context of the automotive industry. In this paper we shall introduce a novel approach to compute risk functions by using a combination of a highly non-linear processing model in conjunct... | {
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0705.0693 | Learning to Bluff | [
"cs.AI"
] | The act of bluffing confounds game designers to this day. The very nature of bluffing is even open for debate, adding further complication to the process of creating intelligent virtual players that can bluff, and hence play, realistically. Through the use of intelligent, learning agents, and carefully designed agent o... | {
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0705.0734 | Soft constraint abstraction based on semiring homomorphism | [
"cs.AI"
] | The semiring-based constraint satisfaction problems (semiring CSPs), proposed by Bistarelli, Montanari and Rossi \cite{BMR97}, is a very general framework of soft constraints. In this paper we propose an abstraction scheme for soft constraints that uses semiring homomorphism. To find optimal solutions of the concrete p... | {
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0705.0738 | The Optimization of a Novel Prismatic Drive | [
"cs.RO"
] | The design of a mechanical transmission taking into account the transmitted forces is reported in this paper. This transmission is based on Slide-o-Cam, a cam mechanism with multiple rollers mounted on a common translating follower. The design of Slide-o-Cam, a transmission intended to produce a sliding motion from a t... | {
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0705.0751 | Approximate textual retrieval | [
"cs.IR",
"cs.DL"
] | An approximate textual retrieval algorithm for searching sources with high levels of defects is presented. It considers splitting the words in a query into two overlapping segments and subsequently building composite regular expressions from interlacing subsets of the segments. This procedure reduces the probability of... | {
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0705.0760 | Equivalence of LP Relaxation and Max-Product for Weighted Matching in
General Graphs | [
"cs.IT",
"cs.AI",
"cs.LG",
"cs.NI",
"math.IT"
] | Max-product belief propagation is a local, iterative algorithm to find the mode/MAP estimate of a probability distribution. While it has been successfully employed in a wide variety of applications, there are relatively few theoretical guarantees of convergence and correctness for general loopy graphs that may have man... | {
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0705.0761 | Bayesian Approach to Neuro-Rough Models | [
"cs.AI"
] | This paper proposes a neuro-rough model based on multi-layered perceptron and rough set. The neuro-rough model is then tested on modelling the risk of HIV from demographic data. The model is formulated using Bayesian framework and trained using Monte Carlo method and Metropolis criterion. When the model was tested to e... | {
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0705.0781 | Medical Image Segmentation and Localization using Deformable Templates | [
"cs.CV"
] | This paper presents deformable templates as a tool for segmentation and localization of biological structures in medical images. Structures are represented by a prototype template, combined with a parametric warp mapping used to deform the original shape. The localization procedure is achieved using a multi-stage, mult... | {
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0705.0783 | Non-cooperative games for spreading code optimization, power control and
receiver design in wireless data networks | [
"cs.IT",
"cs.GT",
"math.IT"
] | This paper focuses on the issue of energy efficiency in wireless data networks through a game theoretic approach. The case considered is that in which each user is allowed to vary its transmit power, spreading code, and uplink receiver in order to maximize its own utility, which is here defined as the ratio of data thr... | {
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0705.0828 | Enhancement of Noisy Planar Nuclear Medicine Images using Mean Field
Annealing | [
"cs.CV"
] | Nuclear medicine (NM) images inherently suffer from large amounts of noise and blur. The purpose of this research is to reduce the noise and blur while maintaining image integrity for improved diagnosis. The proposed solution is to increase image quality after the standard pre- and post-processing undertaken by a gamma... | {
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0705.0856 | The Multiobjective Optimization of a Prismatic Drive | [
"cs.RO"
] | The multiobjective optimization of Slide-o-Cam is reported in this paper. Slide-o-Cam is a cam mechanism with multiple rollers mounted on a common translating follower. This transmission provides pure-rolling motion, thereby reducing the friction of rack-and-pinions and linear drives. A Pareto frontier is obtained by m... | {
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0705.0909 | Game-Theoretic Power Control in Impulse Radio UWB Wireless Networks | [
"cs.GT",
"cs.IT",
"math.IT"
] | In this paper, a game-theoretic model for studying power control for wireless data networks in frequency-selective multipath environments is analyzed. The uplink of an impulse-radio ultrawideband system is considered. The effects of self-interference and multiple-access interference on the performance of Rake receivers... | {
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0705.0932 | Variable-Rate Distributed Source Coding in the Presence of Byzantine
Sensors | [
"cs.IT",
"math.IT"
] | The distributed source coding problem is considered when the sensors, or encoders, are under Byzantine attack; that is, an unknown number of sensors have been reprogrammed by a malicious intruder to undermine the reconstruction at the fusion center. Three different forms of the problem are considered. The first is a va... | {
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0705.0936 | Performance Comparison of Energy-Efficient Power Control for CDMA and
Multiuser UWB Networks | [
"cs.GT",
"cs.IT",
"math.IT"
] | This paper studies the performance of a wireless data network using energy-efficient power control techniques when different multiple access schemes, namely direct-sequence code division multiple access (DS-CDMA) and impulse-radio ultrawideband (IR-UWB), are considered. Due to the large bandwidth of the system, the mul... | {
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0705.0952 | An Independent Evaluation of Subspace Face Recognition Algorithms | [
"cs.CV"
] | This paper explores a comparative study of both the linear and kernel implementations of three of the most popular Appearance-based Face Recognition projection classes, these being the methodologies of Principal Component Analysis, Linear Discriminant Analysis and Independent Component Analysis. The experimental proced... | {
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0705.0956 | On Isotropic Sets of Points in the Plane. Application to the Design of
Robot Archirectures | [
"cs.RO"
] | Various performance indices are used for the design of serial manipulators. One method of optimization relies on the condition number of the Jacobian matrix. The minimization of the condition number leads, under certain conditions, to isotropic configurations, for which the roundoff-error amplification is lowest. In th... | {
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0705.0959 | The Kinematic Analysis of a Symmetrical Three-Degree-of-Freedom Planar
Parallel Manipulator | [
"cs.RO"
] | Presented in this paper is the kinematic analysis of a symmetrical three-degree-of-freedom planar parallel manipulator. In opposite to serial manipulators, parallel manipulators can admit not only multiple inverse kinematic solutions, but also multiple direct kinematic solutions. This property produces more complicated... | {
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0705.0960 | Uniqueness Domains in the Workspace of Parallel Manipulators | [
"cs.RO"
] | This work investigates new kinematic features of parallel manipulators. It is well known that parallel manipulators admit generally several direct kinematic solutions for a given set of input joint values. The aim of this paper is to characterize the uniqueness domains in the workspace of parallel manipulators, as well... | {
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0705.0961 | The Kinematic design of a 3-dof Hybrid Manipulator | [
"cs.RO"
] | This paper focuses on the kinematic properties of a new three-degree-of-freedom hybrid manipulator. This manipulator is obtained by adding in series to a five-bar planar mechanism (similar to the one studied by Bajpai and Roth) a third revolute passing through the line of centers of the two actuated revolute joints of ... | {
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0705.0962 | Definition sets for the Direct Kinematics of Parallel Manipulators | [
"cs.RO"
] | The aim of this paper is to characterize the uniqueness domains in the workspace of parallel manipulators, as well as their image in the joint space. The notion of aspect introduced for serial manipulators in [Borrel 86] is redefined for such parallel manipulators. Then, it is shown that it is possible to link several ... | {
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0705.0969 | Artificial Neural Networks and Support Vector Machines for Water Demand
Time Series Forecasting | [
"cs.AI"
] | Water plays a pivotal role in many physical processes, and most importantly in sustaining human life, animal life and plant life. Water supply entities therefore have the responsibility to supply clean and safe water at the rate required by the consumer. It is therefore necessary to implement mechanisms and systems tha... | {
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0705.0982 | A New Three-DOF Parallel Mechanism: Milling Machine Applications | [
"cs.RO"
] | This paper describes a new parallel kinematic architecture for machining applications, namely, the orthoglide. This machine features three fixed parallel linear joints which are mounted orthogonally and a mobile platform which moves in the Cartesian x-y-z space with fixed orientation. The main interest of the orthoglid... | {
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0705.0999 | Cellular Systems with Full-Duplex Amplify-and-Forward Relaying and
Cooperative Base-Stations | [
"cs.IT",
"math.IT"
] | In this paper the benefits provided by multi-cell processing of signals transmitted by mobile terminals which are received via dedicated relay terminals (RTs) are assessed. Unlike previous works, each RT is assumed here to be capable of full-duplex operation and receives the transmission of adjacent relay terminals. Fo... | {
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0705.1031 | Fuzzy Artmap and Neural Network Approach to Online Processing of Inputs
with Missing Values | [
"cs.AI"
] | An ensemble based approach for dealing with missing data, without predicting or imputing the missing values is proposed. This technique is suitable for online operations of neural networks and as a result, is used for online condition monitoring. The proposed technique is tested in both classification and regression pr... | {
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0705.1033 | Optimal Cache-Oblivious Mesh Layouts | [
"cs.DS",
"cs.CE",
"cs.MS",
"cs.NA"
] | A mesh is a graph that divides physical space into regularly-shaped regions. Meshes computations form the basis of many applications, e.g. finite-element methods, image rendering, and collision detection. In one important mesh primitive, called a mesh update, each mesh vertex stores a value and repeatedly updates this ... | {
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0705.1036 | Strategies for the Design of a Slide-o-Cam Transmission | [
"cs.RO"
] | The optimization of the pressure angle in a cam-follower transmission is reported in this paper. This transmission is based on Slide-o-Cam, a cam mechanism with multiple rollers mounted on a common translating follower. The design of Slide-o-Cam, a transmission intended to produce a sliding motion from a turning drive,... | {
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0705.1037 | Regions of Feasible Point-to-Point Trajectories in the Cartesian
Workspace of Fully-Parallel Manipulators | [
"cs.RO"
] | The goal of this paper is to define the n-connected regions in the Cartesian workspace of fully-parallel manipulators, i.e. the maximal regions where it is possible to execute point-to-point motions. The manipulators considered in this study may have multiple direct and inverse kinematic solutions. The N-connected regi... | {
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0705.1038 | The Design of Parallel Kinematic Machine Tools Using Kinetostatic
Performance Criteria | [
"cs.RO"
] | Most industrial machine tools have a serial kinematic architecture, which means that each axis has to carry the following one, including its actuators and joints. High Speed Machining highlights some drawbacks of such architectures: heavy moving parts require from the machine structure high stiffness to limit bending p... | {
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0705.1110 | Mining Patterns with a Balanced Interval | [
"cs.AI",
"cs.DB"
] | In many applications it will be useful to know those patterns that occur with a balanced interval, e.g., a certain combination of phone numbers are called almost every Friday or a group of products are sold a lot on Tuesday and Thursday. In previous work we proposed a new measure of support (the number of occurrences... | {
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0705.1148 | S\'eparation des Solutions aux Mod\`eles G\'eom\'etriques Direct et
Inverse pour les Manipulateurs Pleinement Parall\`eles | [
"cs.RO"
] | This article provides a formalism making it possible to manage the solutions of the direct and inverse kinematic models of the fully parallel manipulators. We introduce the concept of working modes to separate the solutions from the opposite geometrical model. Then, we define, for each working mode, the aspects of thes... | {
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0705.1150 | On the Kinetostatic Optimization of Revolute-Coupled Planar Manipulators | [
"cs.RO"
] | Proposed in this paper is a kinetostatic performance index for the optimum dimensioning of planar manipulators of the serial type. The index is based on the concept of distance of the underlying Jacobian matrix to a given isotropic matrix that is used as a reference model for purposes of performance evaluation. Applica... | {
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0705.1151 | Achievable Rates and Optimal Resource Allocation for Imperfectly-Known
Fading Relay Channels | [
"cs.IT",
"math.IT"
] | In this paper, achievable rates of imperfectly-known fading relay channels are studied. It is assumed that communication starts with the network training phase in which the receivers estimate the fading coefficients of their respective channels. In the data transmission phase, amplify-and-forward and decode-and-forward... | {
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0705.1159 | Ordering Finite-State Markov Channels by Mutual Information | [
"cs.IT",
"math.IT"
] | In previous work, an ordering result was given for the symbolwise probability of error using general Markov channels, under iterative decoding of LDPC codes. In this paper, the ordering result is extended to mutual information, under the assumption of an iid input distribution. For certain channels, in which the capaci... | {
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0705.1161 | IDF revisited: A simple new derivation within the Robertson-Sp\"arck
Jones probabilistic model | [
"cs.IR",
"cs.CL"
] | There have been a number of prior attempts to theoretically justify the effectiveness of the inverse document frequency (IDF). Those that take as their starting point Robertson and Sparck Jones's probabilistic model are based on strong or complex assumptions. We show that a more intuitively plausible assumption suffice... | {
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0705.1183 | Multiple Antenna Secure Broadcast over Wireless Networks | [
"cs.IT",
"math.IT"
] | In wireless data networks, communication is particularly susceptible to eavesdropping due to its broadcast nature. Security and privacy systems have become critical for wireless providers and enterprise networks. This paper considers the problem of secret communication over the Gaussian broadcast channel, where a multi... | {
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0705.1187 | Symbol Error Rates of Maximum-Likelihood Detector: Convex/Concave
Behavior and Applications | [
"cs.IT",
"math.IT"
] | Convexity/concavity properties of symbol error rates (SER) of the maximum likelihood detector operating in the AWGN channel (non-fading and fading) are studied. Generic conditions are identified under which the SER is a convex/concave function of the SNR. Universal bounds for the SER 1st and 2nd derivatives are obtaine... | {
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"cs.SI": 0,
"cs.SY": 0
} |
0705.1209 | Artificial Intelligence for Conflict Management | [
"cs.AI"
] | Militarised conflict is one of the risks that have a significant impact on society. Militarised Interstate Dispute (MID) is defined as an outcome of interstate interactions, which result on either peace or conflict. Effective prediction of the possibility of conflict between states is an important decision support tool... | {
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} |
0705.1214 | Control of Complex Systems Using Bayesian Networks and Genetic Algorithm | [
"cs.CE",
"cs.NE"
] | A method based on Bayesian neural networks and genetic algorithm is proposed to control the fermentation process. The relationship between input and output variables is modelled using Bayesian neural network that is trained using hybrid Monte Carlo method. A feedback loop based on genetic algorithm is used to change in... | {
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} |
0705.1215 | Kinematic Calibration of the Orthoglide-Type Mechanisms | [
"cs.RO"
] | The paper proposes a novel calibration approach for the Orthoglide-type mechanisms based on observations of the manipulator leg parallelism during motions between the prespecified test postures. It employs a low-cost measuring system composed of standard comparator indicators attached to the universal magnetic stands. ... | {
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} |
0705.1217 | The Design of a Novel Prismatic Drive for a Three-DOF
Parallel-Kinematics Machine | [
"cs.RO"
] | The design of a novel prismatic drive is reported in this paper. This transmission is based on Slide-O-Cam, a cam mechanism with multiple rollers mounted on a common translating follower. The design of Slide-O-Cam was reported elsewhere. This drive thus provides pure-rolling motion, thereby reducing the friction of rac... | {
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} |
0705.1218 | Calibration of quasi-isotropic parallel kinematic Machines: Orthoglide | [
"cs.RO"
] | The paper proposes a novel approach for the geometrical model calibration of quasi-isotropic parallel kinematic mechanisms of the Orthoglide family. It is based on the observations of the manipulator leg parallelism during motions between the specific test postures and employs a low-cost measuring system composed of st... | {
"Other": 0,
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} |
0705.1227 | Rate Adaptation for Cognitive Radio under Interference from Primary
Spectrum User | [
"cs.IT",
"cs.NI",
"math.IT"
] | A cognitive radio can operate as a secondary system in a given spectrum. This operation should use limited power in order not to disturb the communication by primary spectrum user. Under such conditions, in this paper we investigate how to maximize the spectral efficiency in the secondary system. A secondary receiver o... | {
"Other": 1,
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} |
0705.1244 | Evolving Symbolic Controllers | [
"cs.AI"
] | The idea of symbolic controllers tries to bridge the gap between the top-down manual design of the controller architecture, as advocated in Brooks' subsumption architecture, and the bottom-up designer-free approach that is now standard within the Evolutionary Robotics community. The designer provides a set of elementar... | {
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} |
0705.1271 | Design of a 3 Axis Parallel Machine Tool for High Speed Machining: The
Orthoglide | [
"cs.RO"
] | The Orthoglide project aims at designing a new 3-axis machine tool for High Speed Machining. Basis kinematics is a 3 degree-of-freedom translational parallel mechanism. This basis was submitted to isotropic and manipulability constraints that allowed the optmization of its kinematic architecture and legs architecture. ... | {
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} |
0705.1272 | The Isoconditioning Loci of Planar Three-DOF Parallel Manipulators | [
"cs.RO"
] | The subject of this paper is a special class of parallel manipulators. First, we analyze a family of three-degree-of-freedom manipulators. Two Jacobian matrices appear in the kinematic relations between the joint-rate and the Cartesian-velocity vectors, which are called the "inverse kinematics" and the "direct kinemati... | {
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} |
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