id stringlengths 9 16 | title stringlengths 4 278 | categories listlengths 1 13 | abstract stringlengths 3 4.08k | filtered_category_membership dict |
|---|---|---|---|---|
0804.3120 | The Capacity Of Two Way Relay Channel | [
"cs.IT",
"math.IT"
] | This paper investigates the capacity of a wireless two way relay channel in which two end nodes exchange information via a relay node. The capacity is defined in the information-theoretic sense as the maximum information exchange rate between the two end nodes. We give an upper bound of the capacity by applying the cut... | {
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0804.3155 | Leveraging Coherent Distributed Space-Time Codes for Noncoherent
Communication in Relay Networks via Training | [
"cs.IT",
"math.IT"
] | For point to point multiple input multiple output systems, Dayal-Brehler-Varanasi have proved that training codes achieve the same diversity order as that of the underlying coherent space time block code (STBC) if a simple minimum mean squared error estimate of the channel formed using the training part is employed for... | {
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0804.3160 | On the performance of approximate equilibria in congestion games | [
"cs.GT",
"cs.AI",
"cs.NI"
] | We study the performance of approximate Nash equilibria for linear congestion games. We consider how much the price of anarchy worsens and how much the price of stability improves as a function of the approximation factor $\epsilon$. We give (almost) tight upper and lower bounds for both the price of anarchy and the pr... | {
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0804.3171 | Optimization Approach for Detecting the Critical Data on a Database | [
"cs.DB"
] | Through purposeful introduction of malicious transactions (tracking transactions) into randomly select nodes of a (database) graph, soiled and clean segments are identified. Soiled and clean measures corresponding those segments are then computed. These measures are used to repose the problem of critical database eleme... | {
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0804.3215 | Multicast Capacity of Optical WDM Packet Ring for Hotspot Traffic | [
"cs.IT",
"math.IT"
] | Packet-switching WDM ring networks with a hotspot transporting unicast, multicast, and broadcast traffic are important components of high-speed metropolitan area networks. For an arbitrary multicast fanout traffic model with uniform, hotspot destination, and hotspot source packet traffic, we analyze the maximum achieva... | {
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0804.3234 | Technical Report - Automatic Contour Extraction from 2D Neuron Images | [
"cs.CV",
"q-bio.NC"
] | This work describes a novel methodology for automatic contour extraction from 2D images of 3D neurons (e.g. camera lucida images and other types of 2D microscopy). Most contour-based shape analysis methods can not be used to characterize such cells because of overlaps between neuronal processes. The proposed framework ... | {
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0804.3255 | Reconstruction of Multidimensional Signals from Irregular Noisy Samples | [
"cs.IT",
"math.IT"
] | We focus on a multidimensional field with uncorrelated spectrum, and study the quality of the reconstructed signal when the field samples are irregularly spaced and affected by independent and identically distributed noise. More specifically, we apply linear reconstruction techniques and take the mean square error (MSE... | {
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0804.3259 | On Multiuser Power Region of Fading Multiple-Access Channel with
Multiple Antennas | [
"cs.IT",
"math.IT"
] | This paper is concerned with the fading MIMO-MAC with multiple receive antennas at the base station (BS) and multiple transmit antennas at each mobile terminal (MT). Two multiple-access techniques are considered for scheduling transmissions from each MT to the BS at the same frequency, which are space-division multiple... | {
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0804.3261 | Optimal Dynamic Resource Allocation for Multi-Antenna Broadcasting with
Heterogeneous Delay-Constrained Traffic | [
"cs.IT",
"math.IT"
] | This paper is concerned with dynamic resource allocation in a cellular wireless network with slow fading for support of data traffic having heterogeneous transmission delay requirements. The multiple-input single-output (MISO) fading broadcast channel (BC) is of interest where the base station (BS) employs multiple tra... | {
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0804.3269 | Phoneme recognition in TIMIT with BLSTM-CTC | [
"cs.CL",
"cs.NE"
] | We compare the performance of a recurrent neural network with the best results published so far on phoneme recognition in the TIMIT database. These published results have been obtained with a combination of classifiers. However, in this paper we apply a single recurrent neural network to the same task. Our recurrent ne... | {
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0804.3271 | Information Theoretic Operating Regimes of Large Wireless Networks | [
"cs.IT",
"math.IT"
] | In analyzing the point-to-point wireless channel, insights about two qualitatively different operating regimes--bandwidth- and power-limited--have proven indispensable in the design of good communication schemes. In this paper, we propose a new scaling law formulation for wireless networks that allows us to develop a t... | {
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0804.3361 | A New Approach to Automated Epileptic Diagnosis Using EEG and
Probabilistic Neural Network | [
"cs.AI",
"cs.CV"
] | Epilepsy is one of the most common neurological disorders that greatly impair patient' daily lives. Traditional epileptic diagnosis relies on tedious visual screening by neurologists from lengthy EEG recording that requires the presence of seizure (ictal) activities. Nowadays, there are many systems helping the neurolo... | {
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0804.3421 | Coalitions in Cooperative Wireless Networks | [
"cs.GT",
"cs.IT",
"math.IT"
] | Cooperation between rational users in wireless networks is studied using coalitional game theory. Using the rate achieved by a user as its utility, it is shown that the stable coalition structure, i.e., set of coalitions from which users have no incentives to defect, depends on the manner in which the rate gains are ap... | {
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0804.3430 | Combining Beamforming and Space-Time Coding Using Noisy Quantized
Feedback | [
"cs.IT",
"math.IT"
] | The goal of combining beamforming and space-time coding in this work is to obtain full-diversity order and to provide additional received power (array gain) compared to conventional space-time codes. In our system, we consider a quasi-static fading environment and we incorporate both high-rate and low-rate feedback cha... | {
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0804.3439 | Information theoretic bounds for Compressed Sensing | [
"cs.IT",
"math.IT"
] | In this paper we derive information theoretic performance bounds to sensing and reconstruction of sparse phenomena from noisy projections. We consider two settings: output noise models where the noise enters after the projection and input noise models where the noise enters before the projection. We consider two types ... | {
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0804.3453 | Weighted Sum Rate Optimization for Cognitive Radio MIMO Broadcast
Channels | [
"cs.IT",
"math.IT"
] | In this paper, we consider a cognitive radio (CR) network in which the unlicensed (secondary) users are allowed to concurrently access the spectrum allocated to the licensed (primary) users provided that their interference to the primary users (PUs) satisfies certain constraints. We study a weighted sum rate maximizati... | {
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0804.3459 | Towards a stable definition of Kolmogorov-Chaitin complexity | [
"cs.IT",
"cs.CC",
"math.IT"
] | Although information content is invariant up to an additive constant, the range of possible additive constants applicable to programming languages is so large that in practice it plays a major role in the actual evaluation of K(s), the Kolmogorov-Chaitin complexity of a string s. Some attempts have been made to arrive ... | {
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0804.3500 | Natural pseudo-distance and optimal matching between reduced size
functions | [
"cs.CG",
"cs.CV"
] | This paper studies the properties of a new lower bound for the natural pseudo-distance. The natural pseudo-distance is a dissimilarity measure between shapes, where a shape is viewed as a topological space endowed with a real-valued continuous function. Measuring dissimilarity amounts to minimizing the change in the fu... | {
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0804.3507 | Sixteen New Linear Codes With Plotkin Sum | [
"cs.IT",
"math.IT"
] | Sixteen new linear codes are presented: three of them improve the lower bounds on the minimum distance for a linear code and the rest are an explicit construction of unknown codes attaining the lower bounds on the minimum distance. They are constructed using the Plotkin sum of two linear codes, also called $(u|u+v)$ co... | {
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0804.3575 | Isotropic PCA and Affine-Invariant Clustering | [
"cs.LG",
"cs.CG"
] | We present a new algorithm for clustering points in R^n. The key property of the algorithm is that it is affine-invariant, i.e., it produces the same partition for any affine transformation of the input. It has strong guarantees when the input is drawn from a mixture model. For a mixture of two arbitrary Gaussians, the... | {
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0804.3599 | Respect My Authority! HITS Without Hyperlinks, Utilizing Cluster-Based
Language Models | [
"cs.IR",
"cs.CL"
] | We present an approach to improving the precision of an initial document ranking wherein we utilize cluster information within a graph-based framework. The main idea is to perform re-ranking based on centrality within bipartite graphs of documents (on one side) and clusters (on the other side), on the premise that thes... | {
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0804.3671 | Constructions for Clumps Statistics | [
"cs.DM",
"cs.IR"
] | We consider a component of the word statistics known as clump; starting from a finite set of words, clumps are maximal overlapping sets of these occurrences. This parameter has first been studied by Schbath with the aim of counting the number of occurrences of words in random texts. Later work with similar probabilisti... | {
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0804.3678 | Causal inference using the algorithmic Markov condition | [
"math.ST",
"cs.IT",
"math.IT",
"stat.ML",
"stat.TH"
] | Inferring the causal structure that links n observables is usually based upon detecting statistical dependences and choosing simple graphs that make the joint measure Markovian. Here we argue why causal inference is also possible when only single observations are present. We develop a theory how to generate causal gr... | {
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0804.3680 | Word-Based Text Compression | [
"cs.IT",
"math.IT"
] | Today there are many universal compression algorithms, but in most cases is for specific data better using specific algorithm - JPEG for images, MPEG for movies, etc. For textual documents there are special methods based on PPM algorithm or methods with non-character access, e.g. word-based compression. In the past, se... | {
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0804.3817 | Multiple Random Oracles Are Better Than One | [
"cs.LG"
] | We study the problem of learning k-juntas given access to examples drawn from a number of different product distributions. Thus we wish to learn a function f : {-1,1}^n -> {-1,1} that depends on k (unknown) coordinates. While the best known algorithms for the general problem of learning a k-junta require running time o... | {
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0804.3825 | On the inner and outer bounds for 2-receiver discrete memoryless
broadcast channels | [
"cs.IT",
"math.IT"
] | We study the best known general inner bound[MAR '79] and outer bound[N-EG'07] for the capacity region of the two user discrete memory less channel. We prove that a seemingly stronger outer bound is identical to a weaker form of the outer bound that was also presented in [N-EG'07]. We are able to further express the bes... | {
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0804.3862 | Image Processing in Optical Guidance for Autonomous Landing of Lunar
Probe | [
"cs.RO"
] | Because of the communication delay between earth and moon, the GNC technology of lunar probe is becoming more important than ever. Current navigation technology is not able to provide precise motion estimation for probe landing control system Computer vision offers a new approach to solve this problem. In this paper, a... | {
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0804.3868 | Comparison of Various Methods for the Calculation of the Distance
Potential Field | [
"physics.comp-ph",
"cs.MA",
"physics.soc-ph"
] | The distance from a given position toward one or more destinations, exits, and way points is a more or less important input variable in most models of pedestrian dynamics. Except for the special case when there are no obstacles in a concave scenario -- i.e. each position is visible from any other -- the calculation of ... | {
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0804.3874 | Hardware In The Loop Simulator in UAV Rapid Development Life Cycle | [
"cs.RO"
] | Field trial is very critical and high risk in autonomous UAV development life cycle. Hardware in the loop (HIL) simulation is a computer simulation that has the ability to simulate UAV flight characteristic, sensor modeling and actuator modeling while communicating in real time with the UAV autopilot hardware. HIL simu... | {
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0804.3879 | Effects of Leaders Position and Shape on Aerodynamic Performances of V
Flight Formation | [
"cs.RO"
] | The influences of the leader in a group of V flight formation are dealt with. The investigation is focused on the effect of its position and shape on aerodynamics performances of a given V flight formation. Vortices generated the wing tip of the leader moves downstream forming a pair of opposite rotating line vortices.... | {
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0804.3881 | Automated Flight Test and System Identification for Rotary Wing Small
Aerial Platform using Frequency Responses Analysis | [
"cs.RO"
] | This paper proposes an autopilot system that can be used to control the small scale rotorcraft during the flight test for linear-frequency-domain system identification. The input frequency swept is generated automatically as part of the autopilot control command. Therefore the bandwidth coverage and consistency of the ... | {
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0804.3882 | Virtual Reality Simulation of Fire Fighting Robot Dynamic and Motion | [
"cs.RO"
] | This paper presents one approach in designing a Fire Fighting Robot which has been contested annually in a robotic student competition in many countries following the rules initiated at the Trinity College. The approach makes use of computer simulation and animation in a virtual reality environment. In the simulation, ... | {
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0804.3885 | Heading Lock Maneuver Testing of Autonomous Underwater Vehicle | [
"cs.RO"
] | In recent years, Autonomous Underwater Vehicle (UAV) research and development at Bandung Institute of Technology in Indonesia has achieved the testing stage in the field. This testing was still being classified as the early testing, since some of the preliminary tests were carried out in the scale of the laboratory. Th... | {
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0804.3891 | Development of Architectures for Internet Telerobotics Systems | [
"cs.RO"
] | This paper presents our experience in developing and implementing Internet telerobotics system. Internet telerobotics system refers to a robot system controlled and monitored remotely through the Internet. A robot manipulator with five degrees of freedom, called Mentor, is employed. Client-server architecture is chosen... | {
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0804.3894 | Unmanned Aerial Vehicle Instrumentation for Rapid Aerial Photo System | [
"cs.RO"
] | This research will proposed a new kind of relatively low cost autonomous UAV that will enable farmers to make just in time mosaics of aerial photo of their crop. These mosaics of aerial photo should be able to be produced with relatively low cost and within the 24 hours of acquisition constraint. The autonomous UAV wil... | {
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0804.3895 | First Principle Approach to Modeling of Small Scale Helicopter | [
"cs.RO"
] | The establishment of global helicopter linear model is very precious and useful for the design of the linear control laws, since it is never afforded in the published literatures. In the first principle approach, the mathematical model was developed using basic helicopter theory accounting for particular characteristic... | {
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0804.3897 | Optimal Tracking Controller Design for a Small Scale Helicopter | [
"cs.RO"
] | A model helicopter is more difficult to control than its full scale counterparts. This is due to its greater sensitivity to control inputs and disturbances as well as higher bandwidth of dynamics. This works is focused on designing practical tracking controller for a small scale helicopter following predefined trajecto... | {
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0804.4042 | Uncorrectable Errors of Weight Half the Minimum Distance for Binary
Linear Codes | [
"cs.IT",
"math.IT"
] | A lower bound on the number of uncorrectable errors of weight half the minimum distance is derived for binary linear codes satisfying some condition. The condition is satisfied by some primitive BCH codes, extended primitive BCH codes, Reed-Muller codes, and random linear codes. The bound asymptotically coincides with ... | {
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0804.4071 | Logic Mining Using Neural Networks | [
"cs.LO",
"cs.NE"
] | Knowledge could be gained from experts, specialists in the area of interest, or it can be gained by induction from sets of data. Automatic induction of knowledge from data sets, usually stored in large databases, is called data mining. Data mining methods are important in the management of complex systems. There are ma... | {
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0804.4073 | Grainy Numbers | [
"cs.LO",
"cs.AI"
] | Grainy numbers are defined as tuples of bits. They form a lattice where the meet and the join operations are an addition and a multiplication. They may be substituted for the real numbers in the definition of fuzzy sets. The aim is to propose an alternative negation for the complement that we'll call supplement. | {
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0804.4075 | Logic Learning in Hopfield Networks | [
"cs.LO",
"cs.NE"
] | Synaptic weights for neurons in logic programming can be calculated either by using Hebbian learning or by Wan Abdullah's method. In other words, Hebbian learning for governing events corresponding to some respective program clauses is equivalent with learning using Wan Abdullah's method for the same respective program... | {
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0804.4187 | On the Asymptotic Behavior of Selfish Transmitters Sharing a Common
Channel | [
"cs.IT",
"cs.GT",
"math.IT"
] | This paper analyzes the asymptotic behavior of a multiple-access network comprising a large number of selfish transmitters competing for access to a common wireless communication channel, and having different utility functions for determining their strategies. A necessary and sufficient condition is given for the total... | {
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0804.4194 | Asymptotic Bound on Binary Self-Orthogonal Codes | [
"cs.IT",
"math.IT"
] | We present two constructions for binary self-orthogonal codes. It turns out that our constructions yield a constructive bound on binary self-orthogonal codes. In particular, when the information rate R=1/2, by our constructive lower bound, the relative minimum distance \delta\approx 0.0595 (for GV bound, \delta\approx ... | {
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0804.4195 | Multi-Antenna Gaussian Broadcast Channels with Confidential Messages | [
"cs.IT",
"cs.CR",
"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 a Gaussian broadcast channel, where a multi-a... | {
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0804.4204 | Distance Distributions in Finite Uniformly Random Networks: Theory and
Applications | [
"cs.IT",
"math.IT"
] | In wireless networks, the knowledge of nodal distances is essential for several areas such as system configuration, performance analysis and protocol design. In order to evaluate distance distributions in random networks, the underlying nodal arrangement is almost universally taken to be an infinite Poisson point proce... | {
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0804.4237 | Explaining the Logical Nature of Electrical Solitons in Neural Circuits | [
"cs.NE",
"q-bio.NC"
] | Neurons are modeled electrically based on ferroelectric membranes thin enough to permit charge transfer, conjectured to be the tunneling result of thermally energetic ions and random electrons. These membranes can be triggered to produce electrical solitons, the main signals for brain associative memory and logical pro... | {
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0804.4239 | Capacity Definitions for General Channels with Receiver Side Information | [
"cs.IT",
"math.IT"
] | We consider three capacity definitions for general channels with channel side information at the receiver, where the channel is modeled as a sequence of finite dimensional conditional distributions not necessarily stationary, ergodic, or information stable. The {\em Shannon capacity} is the highest rate asymptotically ... | {
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0804.4255 | Expected Message Delivery Time for Small-world Networks in the Continuum
Limit | [
"cs.IT",
"math.IT"
] | Small-world networks are networks in which the graphical diameter of the network is as small as the diameter of random graphs but whose nodes are highly clustered when compared with the ones in a random graph. Examples of small-world networks abound in sociology, biology, neuroscience and physics as well as in human-ma... | {
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0804.4284 | Network Coding Capacity of Random Wireless Networks under a SINR Model | [
"cs.IT",
"cs.NI",
"math.IT"
] | Previous work on network coding capacity for random wired and wireless networks have focused on the case where the capacities of links in the network are independent. In this paper, we consider a more realistic model, where wireless networks are modelled by random geometric graphs with interference and noise. In this m... | {
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0804.4298 | Wireless Erasure Networks with Feedback | [
"cs.IT",
"math.IT"
] | Consider a lossy packet network of queues, communicating over a wireless medium. This paper presents a throughput-optimal transmission strategy for a unicast network when feedback is available, which has the following advantages: It requires a very limited form of acknowledgment feedback. It is completely distributed, ... | {
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0804.4305 | An Algorigtm for Singular Value Decomposition of Matrices in Blocks | [
"math.NA",
"cs.IR",
"math.AC"
] | Two methods to decompose block matrices analogous to Singular Matrix Decomposition are proposed, one yielding the so called economy decomposition, and other yielding the full decomposition. This method is devised to avoid handling matrices bigger than the biggest blocks, so it is particularly appropriate when a limitat... | {
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0804.4316 | Asymmetric Quantum LDPC Codes | [
"quant-ph",
"cs.IT",
"math.IT"
] | Recently, quantum error-correcting codes were proposed that capitalize on the fact that many physical error models lead to a significant asymmetry between the probabilities for bit flip and phase flip errors. An example for a channel which exhibits such asymmetry is the combined amplitude damping and dephasing channel,... | {
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0804.4336 | Counterflow Extension for the F.A.S.T.-Model | [
"cs.MA",
"physics.comp-ph"
] | The F.A.S.T. (Floor field and Agent based Simulation Tool) model is a microscopic model of pedestrian dynamics, which is discrete in space and time. It was developed in a number of more or less consecutive steps from a simple CA model. This contribution is a summary of a study on an extension of the F.A.S.T-model for c... | {
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0804.4384 | Linear-Programming Decoding of Nonbinary Linear Codes | [
"cs.IT",
"math.IT"
] | A framework for linear-programming (LP) decoding of nonbinary linear codes over rings is developed. This framework facilitates linear-programming based reception for coded modulation systems which use direct modulation mapping of coded symbols. It is proved that the resulting LP decoder has the 'maximum-likelihood cert... | {
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0804.4391 | A Lower Bound on the Bayesian MSE Based on the Optimal Bias Function | [
"cs.IT",
"math.IT"
] | A lower bound on the minimum mean-squared error (MSE) in a Bayesian estimation problem is proposed in this paper. This bound utilizes a well-known connection to the deterministic estimation setting. Using the prior distribution, the bias function which minimizes the Cramer-Rao bound can be determined, resulting in a lo... | {
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0804.4395 | Development of a peristaltic micropump for bio-medical applications
based on mini LIPCA | [
"cs.RO"
] | This paper presents the design, fabrication, and experimental characterization of a peristaltic micropump. The micropump is composed of two layers fabricated from polydimethylsiloxane (PDMS) material. The first layer has a rectangular channel and two valve seals. Three rectangular mini lightweight piezo-composite actua... | {
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0804.4451 | Dependence Structure Estimation via Copula | [
"cs.LG",
"cs.IR",
"stat.ME"
] | Dependence strucuture estimation is one of the important problems in machine learning domain and has many applications in different scientific areas. In this paper, a theoretical framework for such estimation based on copula and copula entropy -- the probabilistic theory of representation and measurement of statistical... | {
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0804.4455 | On the Capacity Bounds of Undirected Networks | [
"cs.IT",
"math.IT"
] | In this work we improve on the bounds presented by Li&Li for network coding gain in the undirected case. A tightened bound for the undirected multicast problem with three terminals is derived. An interesting result shows that with fractional routing, routing throughput can achieve at least 75% of the coding throughput.... | {
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0804.4466 | Free Distance Bounds for Protograph-Based Regular LDPC Convolutional
Codes | [
"cs.IT",
"math.IT"
] | In this paper asymptotic methods are used to form lower bounds on the free distance to constraint length ratio of several ensembles of regular, asymptotically good, protograph-based LDPC convolutional codes. In particular, we show that the free distance to constraint length ratio of the regular LDPC convolutional codes... | {
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0804.4489 | Generalized Degrees of Freedom of the Symmetric Gaussian $K$ User
Interference Channel | [
"cs.IT",
"math.IT"
] | We characterize the generalized degrees of freedom of the $K$ user symmetric Gaussian interference channel where all desired links have the same signal-to-noise ratio (SNR) and all undesired links carrying interference have the same interference-to-noise ratio, ${INR}={SNR}^\alpha$. We find that the number of generaliz... | {
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0804.4517 | A multivariate generalization of Costa's entropy power inequality | [
"cs.IT",
"math.IT"
] | A simple multivariate version of Costa's entropy power inequality is proved. In particular, it is shown that if independent white Gaussian noise is added to an arbitrary multivariate signal, the entropy power of the resulting random variable is a multidimensional concave function of the individual variances of the comp... | {
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0804.4584 | Feature Unification in TAG Derivation Trees | [
"cs.CL"
] | The derivation trees of a tree adjoining grammar provide a first insight into the sentence semantics, and are thus prime targets for generation systems. We define a formalism, feature-based regular tree grammars, and a translation from feature based tree adjoining grammars into this new formalism. The translation prese... | {
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0804.4622 | Fast Density Codes for Image Data | [
"cs.NE"
] | Recently, a new method for encoding data sets in the form of "Density Codes" was proposed in the literature (Courrieu, 2006). This method allows to compare sets of points belonging to every multidimensional space, and to build shape spaces invariant to a wide variety of affine and non-affine transformations. However, t... | {
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0804.4662 | Rateless Coding for MIMO Block Fading Channels | [
"cs.IT",
"math.IT"
] | In this paper the performance limits and design principles of rateless codes over fading channels are studied. The diversity-multiplexing tradeoff (DMT) is used to analyze the system performance for all possible transmission rates. It is revealed from the analysis that the design of such rateless codes follows the desi... | {
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0804.4682 | Introduction to Relational Networks for Classification | [
"cs.LG"
] | The use of computational intelligence techniques for classification has been used in numerous applications. This paper compares the use of a Multi Layer Perceptron Neural Network and a new Relational Network on classifying the HIV status of women at ante-natal clinics. The paper discusses the architecture of the relati... | {
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0804.4701 | Superposition-Coded Concurrent Decode-and-Forward Relaying | [
"cs.IT",
"math.IT"
] | In this paper, a superposition-coded concurrent decode-and-forward (DF) relaying protocol is presented. A specific scenario, where the inter-relay channel is sufficiently strong, is considered. Assuming perfect source-relay transmissions, the proposed scheme further improves the diversity performance of previously prop... | {
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0804.4714 | Network Structure and Dynamics, and Emergence of Robustness by
Stabilizing Selection in an Artificial Genome | [
"q-bio.MN",
"cond-mat.dis-nn",
"cs.NE",
"q-bio.GN",
"q-bio.PE"
] | Genetic regulation is a key component in development, but a clear understanding of the structure and dynamics of genetic networks is not yet at hand. In this work we investigate these properties within an artificial genome model originally introduced by Reil. We analyze statistical properties of randomly generated geno... | {
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0804.4717 | Intelligent Unmanned Explorer for Deep Space Exploration | [
"cs.RO"
] | asteroids or comets have received remarkable attention in the world. In small body explorations, especially, detailed in-situ surface exploration by tiny rover is one of effective and fruitful means and is expected to make strong contributions towards scientific studies. JAXA ISAS is promoting MUSES C mission, which is... | {
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0804.4740 | An Affine-invariant Time-dependent Triangulation of Spatio-temporal Data | [
"cs.CG",
"cs.DB"
] | In the geometric data model for spatio-temporal data, introduced by Chomicki and Revesz, spatio-temporal data are modelled as a finite collection of triangles that are transformed by time-dependent affinities of the plane. To facilitate querying and animation of spatio-temporal data, we present a normal form for data i... | {
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0804.4741 | The Effect of Structural Diversity of an Ensemble of Classifiers on
Classification Accuracy | [
"cs.LG"
] | This paper aims to showcase the measure of structural diversity of an ensemble of 9 classifiers and then map a relationship between this structural diversity and accuracy. The structural diversity was induced by having different architectures or structures of the classifiers The Genetical Algorithms (GA) were used to d... | {
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0804.4749 | Study of improving nano-contouring performance by employing
cross-coupling controller | [
"cs.RO"
] | For the tracking stage path planning, we design a two-axis cross-coupling control system which uses the PI controller to compensate the contour error between axes. In this paper, the stage adoptive is designed by our laboratory (Precision Machine Center of National Formosa University). The cross-coupling controller cal... | {
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0804.4750 | The Numerical Control Design for a Pair of Dubins Vehicles | [
"cs.RO"
] | In this paper, a model of a pair of Dubins vehicles is considered. The vehicles move from an initial position and orientation to final position and orientation. A long the motion, the two vehicles are not allowed to collide however the two vehicles cant to far each other. The optimal control of the vehicle is found usi... | {
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0804.4752 | Simulation of Dynamic Yaw Stability Derivatives of a Bird Using CFD | [
"cs.RO"
] | Simulation results on dynamic yaw stability derivatives of a gull bird by means of computational fluid dynamics are presented. Two different kinds of motions are used for determining the dynamic yaw stability derivatives CNr and CNbeta . Concerning the first one, simple lateral translation and yaw rotary motions in yaw... | {
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0804.4753 | Wavelet Based Iterative Learning Control with Fuzzy PD Feedback for
Position Tracking of A Pneumatic Servo System | [
"cs.RO"
] | In this paper, a wavelet-based iterative learning control (WILC) scheme with Fuzzy PD feedback is presented for a pneumatic control system with nonsmooth nonlinearities and uncertain parameters. The wavelet transform is employed to extract the learnable dynamics from measured output signal before it can be used to upda... | {
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0804.4754 | Positive Real Synthesis of Networked Control System An LMI Approach | [
"cs.RO"
] | This paper presents the positive real analysis and synthesis for Networked Control Systems (NCS) in discrete time. Based on the definition of passivity, the sufficient condition of NCS is given by stochastic Lyapunov functional. The controller via state feedback is designed to guarantee the stability of NCS and closed-... | {
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0804.4757 | Analysis of Stability, Response and LQR Controller Design of a Small
Scale Helicopter Dynamics | [
"cs.RO"
] | This paper presents how to use feedback controller with helicopter dynamics state space model. A simplified analysis is presented for controller design using LQR of small scale helicopters for axial and forward flights. Our approach is simple and gives the basic understanding about how to develop controller for solving... | {
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0804.4759 | Design and control of dynamical quantum processes in ortho para H2
conversion on surfaces | [
"cs.RO"
] | We present here a novel, cost-effective method for increasing and controlling the ortho para H2 (o p H2) conversion yield. First, we invoke two processes derived from fundamental, surface science insights, based on the effect of molecular orientation on the hydrogen solid surface reaction, i.e., dynamical quantum filte... | {
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0804.4774 | A Projection Method for Derivation of Non-Shannon-Type Information
Inequalities | [
"cs.IT",
"math.IT"
] | In 1998, Zhang and Yeung found the first unconditional non-Shannon-type information inequality. Recently, Dougherty, Freiling and Zeger gave six new unconditional non-Shannon-type information inequalities. This work generalizes their work and provides a method to systematically derive non-Shannon-type information inequ... | {
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0804.4799 | A Few More Quadratic APN Functions | [
"cs.IT",
"math.IT"
] | We present two infinite families of APN functions where the degree of the field is divisible by 3 but not 9. Our families contain two already known families as special cases. We also discuss the inequivalence proof (by computation) which shows that these functions are new. | {
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0804.4808 | Solving Time of Least Square Systems in Sigma-Pi Unit Networks | [
"cs.NE"
] | The solving of least square systems is a useful operation in neurocomputational modeling of learning, pattern matching, and pattern recognition. In these last two cases, the solution must be obtained on-line, thus the time required to solve a system in a plausible neural architecture is critical. This paper presents a ... | {
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0804.4809 | Fast Computation of Moore-Penrose Inverse Matrices | [
"cs.NE"
] | Many neural learning algorithms require to solve large least square systems in order to obtain synaptic weights. Moore-Penrose inverse matrices allow for solving such systems, even with rank deficiency, and they provide minimum-norm vectors of synaptic weights, which contribute to the regularization of the input-output... | {
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0804.4866 | Sum-Capacity of Ergodic Fading Interference and Compound Multiaccess
Channels | [
"cs.IT",
"math.IT"
] | The problem of resource allocation is studied for two-sender two-receiver fading Gaussian interference channels (IFCs) and compound multiaccess channels (C-MACs). The senders in an IFC communicate with their own receiver (unicast) while those in a C-MAC communicate with both receivers (multicast). The instantaneous fad... | {
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0804.4885 | SimDialog: A visual game dialog editor | [
"cs.HC",
"cs.AI"
] | SimDialog is a visual editor for dialog in computer games. This paper presents the design of SimDialog, illustrating how script writers and non-programmers can easily create dialog for video games with complex branching structures and dynamic response characteristics. The system creates dialog as a directed graph. This... | {
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0804.4898 | A Quadratic Loss Multi-Class SVM | [
"cs.LG"
] | Using a support vector machine requires to set two types of hyperparameters: the soft margin parameter C and the parameters of the kernel. To perform this model selection task, the method of choice is cross-validation. Its leave-one-out variant is known to produce an estimator of the generalization error which is almos... | {
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0805.0012 | Joint Physical Layer Coding and Network Coding for Bi-Directional
Relaying | [
"cs.IT",
"math.IT"
] | We consider the problem of two transmitters wishing to exchange information through a relay in the middle. The channels between the transmitters and the relay are assumed to be synchronized, average power constrained additive white Gaussian noise channels with a real input with signal-to-noise ratio (SNR) of snr. An up... | {
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0805.0034 | Diversity Order Gain with Noisy Feedback in Multiple Access Channels | [
"cs.IT",
"math.IT"
] | In this paper, we study the effect of feedback channel noise on the diversity-multiplexing tradeoff in multiuser MIMO systems using quantized feedback, where each user has m transmit antennas and the base-station receiver has n antennas. We derive an achievable tradeoff and use it to show that in SNR-symmetric channels... | {
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0805.0050 | On the k-pairs problem | [
"cs.IT",
"math.IT"
] | We consider network coding rates for directed and undirected $k$-pairs networks. For directed networks, meagerness is known to be an upper bound on network coding rates. We show that network coding rate can be $\Theta(|V|)$ multiplicative factor smaller than meagerness. For the undirected case, we show some progress in... | {
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0805.0051 | Communicating the sum of sources over a network | [
"cs.IT",
"math.IT"
] | We consider a network (that is capable of network coding) with a set of sources and terminals, where each terminal is interested in recovering the sum of the sources. Considering directed acyclic graphs with unit capacity edges and independent, unit-entropy sources, we show the rate region when (a) there are two source... | {
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0805.0053 | Particle Filtering for Large Dimensional State Spaces with Multimodal
Observation Likelihoods | [
"cs.IT",
"math.IT",
"math.ST",
"stat.ME",
"stat.TH"
] | We study efficient importance sampling techniques for particle filtering (PF) when either (a) the observation likelihood (OL) is frequently multimodal or heavy-tailed, or (b) the state space dimension is large or both. When the OL is multimodal, but the state transition pdf (STP) is narrow enough, the optimal importanc... | {
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0805.0065 | Communication Requirements for Generating Correlated Random Variables | [
"cs.IT",
"cs.GT",
"math.IT",
"math.PR"
] | Two familiar notions of correlation are rediscovered as extreme operating points for simulating a discrete memoryless channel, in which a channel output is generated based only on a description of the channel input. Wyner's "common information" coincides with the minimum description rate needed. However, when common ra... | {
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0805.0092 | Cellular Systems with Full-Duplex Compress-and-Forward Relaying and
Cooperative Base Stations | [
"cs.IT",
"math.IT"
] | In this paper the advantages provided by multicell processing of signals transmitted by mobile terminals (MTs) which are received via dedicated relay terminals (RTs) are studied. It is assumed that each RT is capable of full-duplex operation and receives the transmission of adjacent relay terminals. Focusing on intra-c... | {
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0805.0108 | The Gaussian Wiretap Channel with a Helping Interferer | [
"cs.IT",
"cs.CR",
"math.IT"
] | Due to the broadcast nature of the wireless medium, wireless communication is susceptible to adversarial eavesdropping. This paper describes how eavesdropping can potentially be defeated by exploiting the superposition nature of the wireless medium. A Gaussian wire-tap channel with a helping interferer (WTC-HI) is cons... | {
"Other": 0,
"cs.AI": 0,
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"cs.NE": 0,
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"cs.SD": 0,
"cs.SI": 0,
"cs.SY": 0
} |
0805.0120 | Nonnegative Matrix Factorization via Rank-One Downdate | [
"cs.IR",
"cs.NA"
] | Nonnegative matrix factorization (NMF) was popularized as a tool for data mining by Lee and Seung in 1999. NMF attempts to approximate a matrix with nonnegative entries by a product of two low-rank matrices, also with nonnegative entries. We propose an algorithm called rank-one downdate (R1D) for computing a NMF that i... | {
"Other": 1,
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"cs.CR": 0,
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"cs.IR": 1,
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"cs.MA": 0,
"cs.NE": 0,
"cs.RO": 0,
"cs.SD": 0,
"cs.SI": 0,
"cs.SY": 0
} |
0805.0129 | On some entropy functionals derived from R\'enyi information divergence | [
"cs.IT",
"cond-mat.other",
"math.IT"
] | We consider the maximum entropy problems associated with R\'enyi $Q$-entropy, subject to two kinds of constraints on expected values. The constraints considered are a constraint on the standard expectation, and a constraint on the generalized expectation as encountered in nonextensive statistics. The optimum maximum en... | {
"Other": 0,
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"cs.SD": 0,
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"cs.SY": 0
} |
0805.0131 | Diversity-Multiplexing Tradeoff in Selective-Fading Multiple-Access MIMO
Channels | [
"cs.IT",
"math.IT"
] | We establish the optimal diversity-multiplexing (DM) tradeoff of coherent selective-fading multiple-access multiple-input multiple-output (MIMO) channels and provide corresponding code design criteria. As a byproduct, on the conceptual level, we find an interesting relation between the DM tradeoff framework and the not... | {
"Other": 0,
"cs.AI": 0,
"cs.CE": 0,
"cs.CL": 0,
"cs.CR": 0,
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"cs.CY": 0,
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"cs.IR": 0,
"cs.IT": 1,
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"cs.MA": 0,
"cs.NE": 0,
"cs.RO": 0,
"cs.SD": 0,
"cs.SI": 0,
"cs.SY": 0
} |
0805.0149 | On Recovery of Sparse Signals via $\ell_1$ Minimization | [
"cs.LG"
] | This article considers constrained $\ell_1$ minimization methods for the recovery of high dimensional sparse signals in three settings: noiseless, bounded error and Gaussian noise. A unified and elementary treatment is given in these noise settings for two $\ell_1$ minimization methods: the Dantzig selector and $\ell_1... | {
"Other": 0,
"cs.AI": 0,
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"cs.CL": 0,
"cs.CR": 0,
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"cs.CY": 0,
"cs.DB": 0,
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"cs.IR": 0,
"cs.IT": 0,
"cs.LG": 1,
"cs.MA": 0,
"cs.NE": 0,
"cs.RO": 0,
"cs.SD": 0,
"cs.SI": 0,
"cs.SY": 0
} |
0805.0154 | The Tsallis entropy and the Shannon entropy of a universal probability | [
"cs.IT",
"cs.CC",
"math.IT"
] | We study the properties of Tsallis entropy and Shannon entropy from the point of view of algorithmic randomness. In algorithmic information theory, there are two equivalent ways to define the program-size complexity K(s) of a given finite binary string s. In the standard way, K(s) is defined as the length of the shorte... | {
"Other": 1,
"cs.AI": 0,
"cs.CE": 0,
"cs.CL": 0,
"cs.CR": 0,
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"cs.IR": 0,
"cs.IT": 1,
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"cs.MA": 0,
"cs.NE": 0,
"cs.RO": 0,
"cs.SD": 0,
"cs.SI": 0,
"cs.SY": 0
} |
0805.0173 | A Computer Search for N1L-Configurations | [
"cs.IT",
"math.IT"
] | In an earlier paper the author defined N1L configurations, and stated a conjecture concerning them which would lead to an improvement by a constant factor to the sphere-packing bound for linear double error correcting codes. Here a computer search is presented, in an effort to gather evidence on the conjecture. | {
"Other": 0,
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} |
0805.0184 | Information, Energy and Density for Ad Hoc Sensor Networks over
Correlated Random Fields: Large Deviations Analysis | [
"cs.IT",
"math.IT"
] | Using large deviations results that characterize the amount of information per node on a two-dimensional (2-D) lattice, asymptotic behavior of a sensor network deployed over a correlated random field for statistical inference is investigated. Under a 2-D hidden Gauss-Markov random field model with symmetric first order... | {
"Other": 0,
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"cs.NE": 0,
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"cs.SD": 0,
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} |
0805.0192 | Specification of an extensible and portable file format for electronic
structure and crystallographic data | [
"cs.DL",
"cond-mat.mtrl-sci",
"cs.DB"
] | In order to allow different software applications, in constant evolution, to interact and exchange data, flexible file formats are needed. A file format specification for different types of content has been elaborated to allow communication of data for the software developed within the European Network of Excellence "N... | {
"Other": 1,
"cs.AI": 0,
"cs.CE": 0,
"cs.CL": 0,
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"cs.NE": 0,
"cs.RO": 0,
"cs.SD": 0,
"cs.SI": 0,
"cs.SY": 0
} |
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