id stringlengths 9 16 | title stringlengths 4 278 | categories listlengths 1 13 | abstract stringlengths 3 4.08k | filtered_category_membership dict |
|---|---|---|---|---|
1103.2593 | Unfolding communities in large complex networks: Combining defensive and
offensive label propagation for core extraction | [
"physics.soc-ph",
"cs.SI",
"physics.data-an"
] | Label propagation has proven to be a fast method for detecting communities in large complex networks. Recent developments have also improved the accuracy of the approach, however, a general algorithm is still an open issue. We present an advanced label propagation algorithm that combines two unique strategies of commun... | {
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1103.2596 | Unfolding network communities by combining defensive and offensive label
propagation | [
"physics.soc-ph",
"cs.SI",
"physics.data-an"
] | Label propagation has proven to be a fast method for detecting communities in complex networks. Recent work has also improved the accuracy and stability of the basic algorithm, however, a general approach is still an open issue. We propose different label propagation algorithms that convey two unique strategies of comm... | {
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1103.2607 | LLR Approximation for Wireless Channels Based on Taylor Series and Its
Application to BICM with LDPC Codes | [
"cs.IT",
"math.IT"
] | A new approach for the approximation of the channel log-likelihood ratio (LLR) for wireless channels based on Taylor series is proposed. The approximation is applied to the uncorrelated flat Rayleigh fading channel with unknown channel state information at the receiver. It is shown that the proposed approximation great... | {
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1103.2612 | Synthesis for Constrained Nonlinear Systems using Hybridization and
Robust Controllers on Simplices | [
"cs.SY",
"math.OC"
] | In this paper, we propose an approach to controller synthesis for a class of constrained nonlinear systems. It is based on the use of a hybridization, that is a hybrid abstraction of the nonlinear dynamics. This abstraction is defined on a triangulation of the state-space where on each simplex of the triangulation, the... | {
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1103.2635 | Accelerating Nearest Neighbor Search on Manycore Systems | [
"cs.DB",
"cs.CG",
"cs.DC",
"cs.DS",
"cs.IR"
] | We develop methods for accelerating metric similarity search that are effective on modern hardware. Our algorithms factor into easily parallelizable components, making them simple to deploy and efficient on multicore CPUs and GPUs. Despite the simple structure of our algorithms, their search performance is provably sub... | {
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1103.2651 | Efficient Continual Top-$k$ Keyword Search in Relational Databases | [
"cs.DB",
"cs.IR"
] | Keyword search in relational databases has been widely studied in recent years because it does not require users neither to master a certain structured query language nor to know the complex underlying data schemas. Most of existing methods focus on answering snapshot keyword queries in static databases. In practice, h... | {
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1103.2681 | A Paradoxical Property of the Monkey Book | [
"physics.data-an",
"cond-mat.stat-mech",
"cs.CL",
"cs.IR",
"physics.soc-ph"
] | A "monkey book" is a book consisting of a random distribution of letters and blanks, where a group of letters surrounded by two blanks is defined as a word. We compare the statistics of the word distribution for a monkey book with the corresponding distribution for the general class of random books, where the latter ar... | {
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1103.2690 | Scheduled-PEG construction of LDPC codes for Upper-Layer FEC | [
"cs.IT",
"math.IT"
] | The Progressive Edge Growth (PEG) algorithm is one of the most widely-used method for constructing finite length LDPC codes. In this paper we consider the PEG algorithm together with a scheduling distribution, which specifies the order in which edges are established in the graph. The goal is to find a scheduling distri... | {
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1103.2691 | Extended Non-Binary Low-Density Parity-Check Codes over Erasure Channels | [
"cs.IT",
"math.IT"
] | Based on the extended binary image of non-binary LDPC codes, we propose a method for generating extra redundant bits, such as to decreases the coding rate of a mother code. The proposed method allows for using the same decoder, regardless of how many extra redundant bits have been produced, which considerably increases... | {
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1103.2706 | On stability of continuous-time quantum-filters | [
"math.OC",
"cs.SY",
"quant-ph"
] | We prove that the fidelity between the quantum state governed by a continuous time stochastic master equation driven by a Wiener process and its associated quantum-filter state is a sub-martingale. This result is a generalization to non-pure quantum states where fidelity does not coincide in general with a simple Frobe... | {
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1103.2741 | Memory Retrieval in the B-Matrix Neural Network | [
"cs.NE"
] | This paper is an extension to the memory retrieval procedure of the B-Matrix approach [6],[17] to neural network learning. The B-Matrix is a part of the interconnection matrix generated from the Hebbian neural network, and in memory retrieval, the B-matrix is clamped with a small fragment of the memory. The fragment gr... | {
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1103.2750 | Smart Finite State Devices: A Modeling Framework for Demand Response
Technologies | [
"cs.SY",
"math.OC"
] | We introduce and analyze Markov Decision Process (MDP) machines to model individual devices which are expected to participate in future demand-response markets on distribution grids. We differentiate devices into the following four types: (a) optional loads that can be shed, e.g. light dimming; (b) deferrable loads tha... | {
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1103.2756 | Sparse Transfer Learning for Interactive Video Search Reranking | [
"cs.IR",
"cs.CV",
"cs.MM",
"stat.ML"
] | Visual reranking is effective to improve the performance of the text-based video search. However, existing reranking algorithms can only achieve limited improvement because of the well-known semantic gap between low level visual features and high level semantic concepts. In this paper, we adopt interactive video search... | {
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1103.2795 | Cyber-Physical Attacks in Power Networks: Models, Fundamental
Limitations and Monitor Design | [
"math.OC",
"cs.SY"
] | Future power networks will be characterized by safe and reliable functionality against physical malfunctions and cyber attacks. This paper proposes a unified framework and advanced monitoring procedures to detect and identify network components malfunction or measurements corruption caused by an omniscient adversary. W... | {
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1103.2816 | Universal low-rank matrix recovery from Pauli measurements | [
"quant-ph",
"cs.IT",
"math.IT",
"math.ST",
"stat.ML",
"stat.TH"
] | We study the problem of reconstructing an unknown matrix M of rank r and dimension d using O(rd poly log d) Pauli measurements. This has applications in quantum state tomography, and is a non-commutative analogue of a well-known problem in compressed sensing: recovering a sparse vector from a few of its Fourier coeffic... | {
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1103.2832 | Autotagging music with conditional restricted Boltzmann machines | [
"cs.LG",
"cs.IR",
"cs.SD"
] | This paper describes two applications of conditional restricted Boltzmann machines (CRBMs) to the task of autotagging music. The first consists of training a CRBM to predict tags that a user would apply to a clip of a song based on tags already applied by other users. By learning the relationships between tags, this mo... | {
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1103.2837 | Reweighted LP Decoding for LDPC Codes | [
"cs.IT",
"math.IT"
] | We introduce a novel algorithm for decoding binary linear codes by linear programming. We build on the LP decoding algorithm of Feldman et al. and introduce a post-processing step that solves a second linear program that reweights the objective function based on the outcome of the original LP decoder output. Our analys... | {
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1103.2882 | On optimum strategies for minimizing the exponential moments of a given
cost function | [
"cs.IT",
"cond-mat.stat-mech",
"math.IT"
] | We consider a general problem of finding a strategy that minimizes the exponential moment of a given cost function, with an emphasis on its relation to the more common criterion of minimization the expectation of the first moment of the same cost function. In particular, our main result is a theorem that gives simple s... | {
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1103.2886 | Predicting User Preferences | [
"cs.IR"
] | The many metrics employed for the evaluation of search engine results have not themselves been conclusively evaluated. We propose a new measure for a metric's ability to identify user preference of result lists. Using this measure, we evaluate the metrics Discounted Cumulated Gain, Mean Average Precision and classical ... | {
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1103.2897 | Constructing test instances for Basis Pursuit Denoising | [
"cs.IT",
"math.IT"
] | The number of available algorithms for the so-called Basis Pursuit Denoising problem (or the related LASSO-problem) is large and keeps growing. Similarly, the number of experiments to evaluate and compare these algorithms on different instances is growing. In this note, we present a method to produce instances with e... | {
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1103.2903 | A new ANEW: Evaluation of a word list for sentiment analysis in
microblogs | [
"cs.IR",
"cs.CL"
] | Sentiment analysis of microblogs such as Twitter has recently gained a fair amount of attention. One of the simplest sentiment analysis approaches compares the words of a posting against a labeled word list, where each word has been scored for valence, -- a 'sentiment lexicon' or 'affective word lists'. There exist sev... | {
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1103.2923 | Estimation of Saturation of Permanent-Magnet Synchronous Motors Through
an Energy-Based Model | [
"math.OC",
"cs.SY",
"physics.ins-det"
] | We propose a parametric model of the saturated Permanent-Magnet Synchronous Motor (PMSM) together with an estimation method of the magnetic parameters. The model is based on an energy function which simply encompasses the saturation effects. Injection of fast-varying pulsating voltages and measurements of the resulting... | {
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1103.2950 | Fitting Ranked English and Spanish Letter Frequency Distribution in U.S.
and Mexican Presidential Speeches | [
"cs.CL"
] | The limited range in its abscissa of ranked letter frequency distributions causes multiple functions to fit the observed distribution reasonably well. In order to critically compare various functions, we apply the statistical model selections on ten functions, using the texts of U.S. and Mexican presidential speeches i... | {
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1103.2960 | Xampling: Compressed Sensing of Analog Signals | [
"cs.IT",
"cs.SY",
"math.IT"
] | Xampling generalizes compressed sensing (CS) to reduced-rate sampling of analog signals. A unified framework is introduced for low rate sampling and processing of signals lying in a union of subspaces. Xampling consists of two main blocks: Analog compression that narrows down the input bandwidth prior to sampling with ... | {
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1103.3002 | Floridian high-voltage power-grid network partitioning and cluster
optimization using simulated annealing | [
"physics.soc-ph",
"cond-mat.stat-mech",
"cs.SI"
] | Many partitioning methods may be used to partition a network into smaller clusters while minimizing the number of cuts needed. However, other considerations must also be taken into account when a network represents a real system such as a power grid. In this paper we use a simulated annealing Monte Carlo (MC) method to... | {
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1103.3005 | The Separation Principle in Stochastic Control, Redux | [
"math.OC",
"cs.SY"
] | Over the last 50 years a steady stream of accounts have been written on the separation principle of stochastic control. Even in the context of the linear-quadratic regulator in continuous time with Gaussian white noise, subtle difficulties arise, unexpected by many, that are often overlooked. In this paper we propose a... | {
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1103.3054 | On the Capacity of Memoryless Finite-State Multiple Access Channels with
Asymmetric Noisy State Information at the Encoders | [
"cs.IT",
"math.IT"
] | We consider the capacity of memoryless finite-state multiple access channel (FS-MAC) with causal asymmetric noisy state information available at both transmitters and complete state information available at the receiver. Single letter inner and outer bounds are provided for the capacity of such channels when the state ... | {
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1103.3093 | Exploiting Interference Alignment in Multi-Cell Cooperative OFDMA
Resource Allocation | [
"cs.IT",
"math.IT"
] | This paper studies interference alignment (IA) based multi-cell cooperative resource allocation for the downlink OFDMA with universal frequency reuse. Unlike the traditional scheme that treats subcarriers as separate dimensions for resource allocation, the IA technique is utilized to enable frequency-domain precoding o... | {
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1103.3095 | A note on active learning for smooth problems | [
"cs.LG",
"stat.ML"
] | We show that the disagreement coefficient of certain smooth hypothesis classes is $O(m)$, where $m$ is the dimension of the hypothesis space, thereby answering a question posed in \cite{friedman09}. | {
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1103.3099 | Optimal Power Cost Management Using Stored Energy in Data Centers | [
"cs.PF",
"cs.SY",
"math.OC"
] | Since the electricity bill of a data center constitutes a significant portion of its overall operational costs, reducing this has become important. We investigate cost reduction opportunities that arise by the use of uninterrupted power supply (UPS) units as energy storage devices. This represents a deviation from the ... | {
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1103.3102 | Human-Assisted Graph Search: It's Okay to Ask Questions | [
"cs.DB",
"cs.DS"
] | We consider the problem of human-assisted graph search: given a directed acyclic graph with some (unknown) target node(s), we consider the problem of finding the target node(s) by asking an omniscient human questions of the form "Is there a target node that is reachable from the current node?". This general problem has... | {
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1103.3103 | Guided Data Repair | [
"cs.DB"
] | In this paper we present GDR, a Guided Data Repair framework that incorporates user feedback in the cleaning process to enhance and accelerate existing automatic repair techniques while minimizing user involvement. GDR consults the user on the updates that are most likely to be beneficial in improving data quality. GDR... | {
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1103.3105 | High-Throughput Transaction Executions on Graphics Processors | [
"cs.DB",
"cs.DC"
] | OLTP (On-Line Transaction Processing) is an important business system sector in various traditional and emerging online services. Due to the increasing number of users, OLTP systems require high throughput for executing tens of thousands of transactions in a short time period. Encouraged by the recent success of GPGPU ... | {
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1103.3107 | Incrementally Maintaining Classification using an RDBMS | [
"cs.DB"
] | The proliferation of imprecise data has motivated both researchers and the database industry to push statistical techniques into relational database management systems (RDBMSs). We study algorithms to maintain model-based views for a popular statistical technique, classification, inside an RDBMS in the presence of upda... | {
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1103.3113 | A Broadcast Approach To Secret Key Generation Over Slow Fading Channels | [
"cs.IT",
"cs.CR",
"math.IT"
] | A secret-key generation scheme based on a layered broadcasting strategy is introduced for slow-fading channels. In the model considered, Alice wants to share a key with Bob while keeping the key secret from Eve, who is a passive eavesdropper. Both Alice-Bob and Alice-Eve channels are assumed to undergo slow fading, and... | {
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1103.3117 | Linearity and Complements in Projective Space | [
"cs.IT",
"math.IT"
] | The projective space of order $n$ over the finite field $\Fq$, denoted here as $\Ps$, is the set of all subspaces of the vector space $\Fqn$. The projective space can be endowed with distance function $d_S(X,Y) = \dim(X) + \dim(Y) - 2\dim(X\cap Y)$ which turns $\Ps$ into a metric space. With this, \emph{an $(n,M,d)$ co... | {
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1103.3123 | Reduced Ordered Binary Decision Diagram with Implied Literals: A New
knowledge Compilation Approach | [
"cs.AI"
] | Knowledge compilation is an approach to tackle the computational intractability of general reasoning problems. According to this approach, knowledge bases are converted off-line into a target compilation language which is tractable for on-line querying. Reduced ordered binary decision diagram (ROBDD) is one of the most... | {
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1103.3174 | A Longitudinal Study of Social Media Privacy Behavior | [
"cs.SI",
"cs.CY"
] | Existing constructs for privacy concerns and behaviors do not adequately model deviations between user attitudes and behaviors. Although a number of studies have examined supposed deviations from rationality by online users, true explanations for these behaviors may lie in factors not previously addressed in privacy co... | {
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1103.3190 | Designing Power-Efficient Modulation Formats for Noncoherent Optical
Systems | [
"cs.IT",
"math.IT"
] | We optimize modulation formats for the additive white Gaussian noise channel with a nonnegative input constraint, also known as the intensity-modulated direct detection channel, with and without confining them to a lattice structure. Our optimization criteria are the average electrical and optical power. The nonnegativ... | {
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1103.3196 | Condensation phase transition in nonlinear fitness networks | [
"cond-mat.stat-mech",
"cs.SI",
"nlin.AO",
"physics.soc-ph"
] | We analyze the condensation phase transitions in out-of-equilibrium complex networks in a unifying framework which includes the nonlinear model and the fitness model as its appropriate limits. We show a novel phase structure which depends on both the fitness parameter and the nonlinear exponent. The occurrence of the c... | {
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1103.3223 | Using Soft Computer Techniques on Smart Devices for Monitoring Chronic
Diseases: the CHRONIOUS case | [
"cs.AI"
] | CHRONIOUS is an Open, Ubiquitous and Adaptive Chronic Disease Management Platform for Chronic Obstructive Pulmonary Disease(COPD) Chronic Kidney Disease (CKD) and Renal Insufficiency. It consists of several modules: an ontology based literature search engine, a rule based decision support system, remote sensors interac... | {
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1103.3228 | Multi-parameter acoustic imaging of uniform objects in inhomogeneous
media | [
"cs.CV",
"physics.med-ph"
] | The problem studied in this paper is ultrasound image reconstruction from frequency-domain measurements of the scattered field from an object with contrast in attenuation and sound speed. The case where the object has uniform but unknown contrast in these properties relative to the background is considered. Background ... | {
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1103.3240 | Decentralized Constraint Satisfaction | [
"cs.AI"
] | We show that several important resource allocation problems in wireless networks fit within the common framework of Constraint Satisfaction Problems (CSPs). Inspired by the requirements of these applications, where variables are located at distinct network devices that may not be able to communicate but may interfere, ... | {
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1103.3292 | Feedback Reduction for MIMO Broadcast Channel with Heterogeneous Fading | [
"cs.IT",
"math.IT"
] | This paper considers feedback load reduction for multiuser multiple input multiple output (MIMO) broadcast channel where the users' channel distributions are not homogeneous. A cluster-based feedback scheme is proposed such that the range of possible signal-to-noise ratio (SNR) of the users are divided into several clu... | {
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1103.3301 | Scaling and entropy in p-median facility location along a line | [
"physics.soc-ph",
"cond-mat.stat-mech",
"cs.SI",
"physics.comp-ph"
] | The p-median problem is a common model for optimal facility location. The task is to place p facilities (e.g., warehouses or schools) in a heterogeneously populated space such that the average distance from a person's home to the nearest facility is minimized. Here we study the special case where the population lives a... | {
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1103.3316 | Deterministic Bounds for Restricted Isometry of Compressed Sensing
Matrices | [
"cs.IT",
"math.IT"
] | Compressed Sensing (CS) is an emerging field that enables reconstruction of a sparse signal $x \in {\mathbb R} ^n$ that has only $k \ll n$ non-zero coefficients from a small number $m \ll n$ of linear projections. The projections are obtained by multiplying $x$ by a matrix $\Phi \in {\mathbb R}^{m \times n}$ --- called... | {
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1103.3339 | Transient Stability Assessment of Smart Power System using Complex
Networks Framework | [
"cs.OH",
"cs.SI",
"physics.soc-ph"
] | In this paper, a new methodology for stability assessment of a smart power system is proposed. The key to this assessment is an index called betweenness index which is based on ideas from complex network theory. The proposed betweenness index is an improvement of previous works since it considers the actual real power ... | {
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1103.3371 | Numerical solution of a fuzzy time-optimal control problem | [
"cs.NA",
"cs.SY",
"math.OC"
] | In this paper, we consider a time-optimal control problem with uncertainties. Dynamics of controlled object is expressed by crisp linear system of differential equations with fuzzy initial and final states. We introduce a notion of fuzzy optimal time and reduce its calculation to two crisp optimal control problems. We ... | {
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1103.3372 | Automatically Discovering Relaxed Lyapunov Functions for Polynomial
Dynamical Systems | [
"math.DS",
"cs.SY",
"math.OC"
] | The notion of Lyapunov function plays a key role in design and verification of dynamical systems, as well as hybrid and cyber-physical systems. In this paper, to analyze the asymptotic stability of a dynamical system, we generalize standard Lyapunov functions to relaxed Lyapunov functions (RLFs), by considering higher ... | {
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1103.3391 | An Integer Linear Programming Model for the Radiotherapy Treatment
Scheduling Problem | [
"cs.CE"
] | Radiotherapy represents an important phase of treatment for a large number of cancer patients. It is essential that resources used to deliver this treatment are employed effectively. This paper presents a new integer linear programming model for real-world radiotherapy treatment scheduling and analyses the effectivenes... | {
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1103.3397 | Criterions for locally dense subgraphs | [
"physics.soc-ph",
"cs.SI",
"physics.comp-ph"
] | Community detection is one of the most investigated problems in the field of complex networks. Although several methods were proposed, there is still no precise definition of communities. As a step towards a definition, I highlight two necessary properties of communities, separation and internal cohesion, the latter be... | {
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1103.3417 | Finding Shortest Path for Developed Cognitive Map Using Medial Axis | [
"cs.AI"
] | this paper presents an enhancement of the medial axis algorithm to be used for finding the optimal shortest path for developed cognitive map. The cognitive map has been developed, based on the architectural blueprint maps. The idea for using the medial-axis is to find main path central pixels; each center pixel represe... | {
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1103.3420 | Extraction of handwritten areas from colored image of bank checks by an
hybrid method | [
"cs.AI"
] | One of the first step in the realization of an automatic system of check recognition is the extraction of the handwritten area. We propose in this paper an hybrid method to extract these areas. This method is based on digit recognition by Fourier descriptors and different steps of colored image processing . It requires... | {
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1103.3430 | Identification of arabic word from bilingual text using character
features | [
"cs.AI",
"cs.CV"
] | The identification of the language of the script is an important stage in the process of recognition of the writing. There are several works in this research area, which treat various languages. Most of the used methods are global or statistical. In this present paper, we study the possibility of using the features of ... | {
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1103.3440 | Off-Line Handwritten Signature Identification Using Rotated Complex
Wavelet Filters | [
"cs.CV"
] | In this paper, a new method for handwritten signature identification based on rotated complex wavelet filters is proposed. We have proposed to use the rotated complex wavelet filters (RCWF) and dual tree complex wavelet transform(DTCWT) together to derive signature feature extraction, which captures information in twel... | {
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1103.3457 | Ex ante prediction of cascade sizes on networks of agents facing binary
outcomes | [
"cs.SI",
"physics.soc-ph"
] | We consider in this paper the potential for ex ante prediction of the cascade size in a model of binary choice with externalities (Schelling 1973, Watts 2002). Agents are connected on a network and can be in one of two states of the world, 0 or 1. Initially, all are in state 0 and a small number of seeds are selected a... | {
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1103.3510 | Degrees of Freedom of a Communication Channel and Kolmogorov numbers | [
"cs.IT",
"math.FA",
"math.IT"
] | In this note, we show that the operator theoretic concept of Kolmogorov numbers and the number of degrees of freedom at level $\epsilon$ of a communication channel are closely related. Linear communication channels may be modeled using linear compact operators on Banach or Hilbert spaces and the number of degrees of fr... | {
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1103.3532 | 4D Wavelet-Based Regularization for Parallel MRI Reconstruction: Impact
on Subject and Group-Levels Statistical Sensitivity in fMRI | [
"stat.ME",
"cs.CV",
"physics.med-ph"
] | Parallel MRI is a fast imaging technique that enables the acquisition of highly resolved images in space. It relies on $k$-space undersampling and multiple receiver coils with complementary sensitivity profiles in order to reconstruct a full Field-Of-View (FOV) image. The performance of parallel imaging mainly depends ... | {
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1103.3541 | Distributed Learning Policies for Power Allocation in Multiple Access
Channels | [
"cs.GT",
"cs.LG",
"cs.NI"
] | We analyze the problem of distributed power allocation for orthogonal multiple access channels by considering a continuous non-cooperative game whose strategy space represents the users' distribution of transmission power over the network's channels. When the channels are static, we find that this game admits an exact ... | {
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1103.3580 | On a Connection between Ideal Two-level Autocorrelation and Almost
Balancedness of $p$-ary Sequences | [
"cs.IT",
"math.IT"
] | In this correspondence, for every periodic $p-$ary sequence satisfying ideal two-level autocorrelation property the existence of an element of the field ${\bf GF}(p)$ which appears one time less than all the rest that are equally distributed in a period of that sequence, is proved by algebraic method. In addition, it i... | {
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1103.3585 | Incremental dimension reduction of tensors with random index | [
"cs.DS",
"cs.CL",
"cs.IR"
] | We present an incremental, scalable and efficient dimension reduction technique for tensors that is based on sparse random linear coding. Data is stored in a compactified representation with fixed size, which makes memory requirements low and predictable. Component encoding and decoding are performed on-line without co... | {
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1103.3596 | Beyond the Cut-Set Bound: Uncertainty Computations in Network Coding
with Correlated Sources | [
"cs.IT",
"math.IT"
] | Cut-set bounds on achievable rates for network communication protocols are not in general tight. In this paper we introduce a new technique for proving converses for the problem of transmission of correlated sources in networks, that results in bounds that are tighter than the corresponding cut-set bounds. We also defi... | {
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1103.3616 | Energy-Optimal Scheduling in Low Duty Cycle Sensor Networks | [
"cs.NI",
"cs.SY",
"math.OC"
] | Energy consumption of a wireless sensor node mainly depends on the amount of time the node spends in each of the high power active (e.g., transmit, receive) and low power sleep modes. It has been well established that in order to prolong node's lifetime the duty-cycle of the node should be low. However, low power sleep... | {
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1103.3624 | Analyzing biosignals using the R freeware (open source) tool | [
"physics.data-an",
"cs.CE",
"physics.bio-ph"
] | For researchers in electromyography (EMG), and similar biosginals, signal processing is naturally an essential topic. There are a number of excellent tools available. To these one may add the freely available open source statistical software package R, which is in fact also a programming language. It is becoming one th... | {
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1103.3641 | On the Pseudocodeword Redundancy of Binary Linear Codes | [
"cs.IT",
"math.IT"
] | The AWGNC, BSC, and max-fractional pseudocodeword redundancies of a binary linear code are defined to be the smallest number of rows in a parity-check matrix such that the corresponding minimum pseudoweight is equal to the minimum Hamming distance of the code. It is shown that most codes do not have a finite pseudocode... | {
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1103.3673 | Buffers Improve the Performance of Relay Selection | [
"cs.IT",
"math.IT"
] | We show that the performance of relay selection can be improved by employing relays with buffers. Under the idealized assumption that no buffer is full or empty, the best source-relay and the best relay-destination channels can be simultaneously exploited by selecting the corresponding relays for reception and transmis... | {
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1103.3687 | Cost Based Satisficing Search Considered Harmful | [
"cs.AI"
] | Recently, several researchers have found that cost-based satisficing search with A* often runs into problems. Although some "work arounds" have been proposed to ameliorate the problem, there has not been any concerted effort to pinpoint its origin. In this paper, we argue that the origins can be traced back to the wide... | {
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1103.3698 | Super-resolution in map-making based on a physical instrument model and
regularized inversion. Application to SPIRE/Herschel | [
"astro-ph.CO",
"astro-ph.IM",
"cs.CE"
] | We investigate super-resolution methods for image reconstruction from data provided by a family of scanning instruments like the Herschel observatory. To do this, we constructed a model of the instrument that faithfully reflects the physical reality, accurately taking the acquisition process into account to explain the... | {
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1103.3719 | Diversity-Multiplexing Tradeoff in the Multiaccess Relay Channel with
Finite Block Length | [
"cs.IT",
"math.IT"
] | The Dynamic Decode-and-Forward (DDF) protocol and the Hybrid DDF and Amplified-and-Forward (HDAF) protocol for the multiple-access relay channel (MARC) with quasi static fading are evaluated using the Zheng-Tse diversity-multiplexing tradeoff (DMT). We assume that there are two users, one half-duplex relay, and a commo... | {
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} |
1103.3735 | Refining Recency Search Results with User Click Feedback | [
"cs.IR",
"cs.AI",
"cs.LG"
] | Traditional machine-learned ranking systems for web search are often trained to capture stationary relevance of documents to queries, which has limited ability to track non-stationary user intention in a timely manner. In recency search, for instance, the relevance of documents to a query on breaking news often changes... | {
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1103.3737 | MDS Array Codes with Optimal Rebuilding | [
"cs.IT",
"cs.DC",
"math.IT"
] | MDS array codes are widely used in storage systems to protect data against erasures. We address the \emph{rebuilding ratio} problem, namely, in the case of erasures, what is the the fraction of the remaining information that needs to be accessed in order to rebuild \emph{exactly} the lost information? It is clear that ... | {
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1103.3742 | The key exchange cryptosystem used with higher order Diophantine
equations | [
"cs.IT",
"math.IT"
] | One-way functions are widely used for encrypting the secret in public key cryptography, although they are regarded as plausibly one-way but have not been proven so. Here we discuss the public key cryptosystem based on the system of higher order Diophantine equations. In this system those Diophantine equations are used ... | {
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1103.3745 | The AllDifferent Constraint with Precedences | [
"cs.AI"
] | We propose AllDiffPrecedence, a new global constraint that combines together an AllDifferent constraint with precedence constraints that strictly order given pairs of variables. We identify a number of applications for this global constraint including instruction scheduling and symmetry breaking. We give an efficient p... | {
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1103.3746 | Using a Secret Key to Foil an Eavesdropper | [
"cs.CR",
"cs.IT",
"math.IT"
] | This work addresses private communication with distributed systems in mind. We consider how to best use secret key resources and communication to transmit signals across a system so that an eavesdropper is least capable to act on the signals. One of the key assumptions is that the private signals are publicly available... | {
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1103.3753 | On the Scalability of Multidimensional Databases | [
"cs.DB"
] | It is commonly accepted in the practice of on-line analytical processing of databases that the multidimensional database organization is less scalable than the relational one. It is easy to see that the size of the multidimensional organization may increase very quickly. For example, if we introduce one additional dime... | {
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1103.3787 | Pattern-recalling processes in quantum Hopfield networks far from
saturation | [
"cond-mat.dis-nn",
"cs.LG",
"physics.bio-ph"
] | As a mathematical model of associative memories, the Hopfield model was now well-established and a lot of studies to reveal the pattern-recalling process have been done from various different approaches. As well-known, a single neuron is itself an uncertain, noisy unit with a finite unnegligible error in the input-outp... | {
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1103.3794 | Improved QPP Interleavers for LTE Standard | [
"cs.IT",
"math.IT"
] | This paper proposes and proves a theorem which stipulates sufficient conditions the coefficients of two quadratic permutation polynomials (QPP) must satisfy, so that the permutations generated by them are identical. The result is used to reduce the search time of QPP interleavers with lengths given by Long Term Evoluti... | {
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1103.3799 | Relaxed Belief Propagation for MIMO Detection | [
"cs.IT",
"math.IT"
] | In this paper, relaxed belief propagation (RBP) based detectors are proposed for multiple-input multiple-out (MIMO) system. The factor graph is leveraged to represent the MIMO channels, and based on which our algorithms are developed. Unlike the existing complicated standard belief propagation (SBP) detector that consi... | {
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1103.3801 | Two methods for solving optimization problems arising in electronic
measurements and electrical engineering | [
"math.NA",
"cs.CE",
"cs.NA",
"math.OC",
"physics.comp-ph"
] | In this paper we introduce a common problem in electronic measurements and electrical engineering: finding the first root from the left of an equation in the presence of some initial conditions. We present examples of electrotechnical devices (analog signal filtering), where it is necessary to solve it. Two new methods... | {
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1103.3837 | Transmission Selection Schemes using Sum Rate Analysis in Distributed
Antenna Systems | [
"cs.IT",
"math.IT"
] | In this paper, we study single cell multi-user downlink distributed antenna systems (DAS) where the antenna ports are geographically separated in a cell. First, we derive an expression of the ergodic sum rate for DAS in the presence of pathloss. Then, we propose a transmission selection scheme based on the derived expr... | {
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1103.3843 | A Simple Sampling Method for Metric Measure Spaces | [
"cs.IT",
"math.IT",
"math.MG"
] | We introduce a new, simple metric method of sampling metric measure spaces, based on a well-known "snowflakeing operator" and we show that, as a consequence of a classical result of Assouad, the sampling of doubling metric spaces is bilipschitz equivalent to that of subsets of some $\mathbb{R}^N$. Moreover, we compare ... | {
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1103.3846 | The Performance of PCM Quantization Under Tight Frame Representations | [
"math.NA",
"cs.IT",
"math.FA",
"math.IT"
] | In this paper, we study the performance of the PCM scheme with linear quantization rule for quantizing finite unit-norm tight frame expansions for $\R^d$ and derive the PCM quantization error without the White Noise Hypothesis. We prove that for the class of unit norm tight frames derived from uniform frame paths the q... | {
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1103.3857 | Difference Sequence Compression of Multidimensional Databases | [
"cs.DB"
] | The multidimensional databases often use compression techniques in order to decrease the size of the database. This paper introduces a new method called difference sequence compression. Under some conditions, this new technique is able to create a smaller size multidimensional database than others like single count hea... | {
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1103.3863 | Multidimensional or Relational? / How to Organize an On-line Analytical
Processing Database | [
"cs.DB"
] | In the past few years, the number of OLAP applications increased quickly. These applications use two significantly different DB structures: multidimensional (MD) and table-based. One can show that the traditional model of relational databases cannot make difference between these two structures. Another model is necessa... | {
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1103.3866 | Multibeam Satellite Frequency/Time Duality Study and Capacity
Optimization | [
"cs.IT",
"cs.NI",
"math.IT"
] | In this paper, we investigate two new candidate transmission schemes, Non-Orthogonal Frequency Reuse (NOFR) and Beam-Hoping (BH). They operate in different domains (frequency and time/space, respectively), and we want to know which domain shows overall best performance. We propose a novel formulation of the Signal-to-I... | {
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1103.3872 | Probability Bracket Notation, Term Vector Space, Concept Fock Space and
Induced Probabilistic IR Models | [
"cs.IR",
"math-ph",
"math.MP",
"math.PR"
] | After a brief introduction to Probability Bracket Notation (PBN) for discrete random variables in time-independent probability spaces, we apply both PBN and Dirac notation to investigate probabilistic modeling for information retrieval (IR). We derive the expressions of relevance of document to query (RDQ) for various ... | {
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1103.3882 | A Transform Approach to Linear Network Coding for Acyclic Networks with
Delay | [
"cs.IT",
"math.IT"
] | The algebraic formulation for linear network coding in acyclic networks with the links having integer delay is well known. Based on this formulation, for a given set of connections over an arbitrary acyclic network with integer delay assumed for the links, the output symbols at the sink nodes, at any given time instant... | {
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1103.3885 | Feedback Reduction for Random Beamforming in Multiuser MIMO Broadcast
Channel | [
"cs.IT",
"math.IT"
] | For the multiuser multiple-input multiple-output (MIMO) downlink channel, the users feedback their channel state information (CSI) to help the base station (BS) schedule users and improve the system sum rate. However, this incurs a large aggregate feedback bandwidth which grows linearly with the number of users. In thi... | {
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1103.3904 | Informed Heuristics for Guiding Stem-and-Cycle Ejection Chains | [
"cs.AI",
"cs.DM"
] | The state of the art in local search for the Traveling Salesman Problem is dominated by ejection chain methods utilising the Stem-and-Cycle reference structure. Though effective such algorithms employ very little information in their successor selection strategy, typically seeking only to minimise the cost of a move. W... | {
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1103.3915 | LDPC Code Design for the BPSK-constrained Gaussian Wiretap Channel | [
"cs.IT",
"math.IT"
] | A coding scheme based on irregular low-density parity-check (LDPC) codes is proposed to send secret messages from a source over the Gaussian wiretap channel to a destination in the presence of a wiretapper, with the restriction that the source can send only binary phase-shift keyed (BPSK) symbols. The secrecy performan... | {
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} |
1103.3933 | Product Constructions for Perfect Lee Codes | [
"cs.IT",
"math.IT"
] | A well known conjecture of Golomb and Welch is that the only nontrivial perfect codes in the Lee and Manhattan metrics have length two or minimum distance three. This problem and related topics were subject for extensive research in the last forty years. In this paper two product constructions for perfect Lee codes and... | {
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1103.3949 | A Goal-Directed Implementation of Query Answering for Hybrid MKNF
Knowledge Bases | [
"cs.AI"
] | Ontologies and rules are usually loosely coupled in knowledge representation formalisms. In fact, ontologies use open-world reasoning while the leading semantics for rules use non-monotonic, closed-world reasoning. One exception is the tightly-coupled framework of Minimal Knowledge and Negation as Failure (MKNF), which... | {
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} |
1103.3952 | Mixing, Ergodic, and Nonergodic Processes with Rapidly Growing
Information between Blocks | [
"cs.IT",
"cs.CL",
"math.IT"
] | We construct mixing processes over an infinite alphabet and ergodic processes over a finite alphabet for which Shannon mutual information between adjacent blocks of length $n$ grows as $n^\beta$, where $\beta\in(0,1)$. The processes are a modification of nonergodic Santa Fe processes, which were introduced in the conte... | {
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} |
1103.3954 | BoolVar/PB v1.0, a java library for translating pseudo-Boolean
constraints into CNF formulae | [
"cs.AI"
] | BoolVar/PB is an open source java library dedicated to the translation of pseudo-Boolean constraints into CNF formulae. Input constraints can be categorized with tags. Several encoding schemes are implemented in a way that each input constraint can be translated using one or several encoders, according to the related t... | {
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} |
1103.4007 | Multiple Access Channel with Partial and Controlled Cribbing Encoders | [
"cs.IT",
"math.IT"
] | In this paper we consider a multiple access channel (MAC) with partial cribbing encoders. This means that each of two encoders obtains a deterministic function of the other encoder output with or without delay. The partial cribbing scheme is especially motivated by the additive noise Gaussian MAC since perfect cribbing... | {
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} |
1103.4012 | On the accuracy of language trees | [
"physics.soc-ph",
"cs.CL",
"q-bio.QM"
] | Historical linguistics aims at inferring the most likely language phylogenetic tree starting from information concerning the evolutionary relatedness of languages. The available information are typically lists of homologous (lexical, phonological, syntactic) features or characters for many different languages. From t... | {
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} |
1103.4039 | Left invertibility of discrete-time output-quantized systems: the linear
case with finite inputs | [
"math.OC",
"cs.SY",
"math.DS"
] | This paper studies left invertibility of discrete-time linear output-quantized systems. Quantized outputs are generated according to a given partition of the state-space, while inputs are sequences on a finite alphabet. Left invertibility, i.e. injectivity of I/O map, is reduced to left D-invertibility, under suitable ... | {
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} |
1103.4059 | Modeling the dynamical interaction between epidemics on overlay networks | [
"physics.soc-ph",
"cond-mat.stat-mech",
"cs.SI",
"q-bio.PE"
] | Epidemics seldom occur as isolated phenomena. Typically, two or more viral agents spread within the same host population and may interact dynamically with each other. We present a general model where two viral agents interact via an immunity mechanism as they propagate simultaneously on two networks connecting the same... | {
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} |
1103.4065 | Probabilistically Safe Vehicle Control in a Hostile Environment | [
"cs.SY",
"cs.RO",
"math.OC"
] | In this paper we present an approach to control a vehicle in a hostile environment with static obstacles and moving adversaries. The vehicle is required to satisfy a mission objective expressed as a temporal logic specification over a set of properties satisfied at regions of a partitioned environment. We model the mov... | {
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} |
1103.4072 | Modularity functions maximization with nonnegative relaxation
facilitates community detection in networks | [
"physics.soc-ph",
"cs.SI"
] | We show here that the problem of maximizing a family of quantitative functions, encompassing both the modularity (Q-measure) and modularity density (D-measure), for community detection can be uniformly understood as a combinatoric optimization involving the trace of a matrix called modularity Laplacian. Instead of usin... | {
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} |
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