ppxscal/embedding_network huggingface dataset:
Using fuzzy logic to enhance control performance of sliding mode control and dynamic matrix control
Authors: Carlos A. Smith, Marco Sanjuan
Venue:  (2006)

Two application applications of Fuzzy Logic to improve the performance of two controllers are presented. The first application takes a Sliding Mode Controller designed for chemical process to reject disturbances. A fuzzy element is added to the sliding surface to improve the controller performance when set point change affects the control loop; especially for process showing highly nonlinear behavior. This fuzzy element, &Delta;SF, is calculated by means of a set of fuzzy rules designed based on expert knowledge and experience. The addition of &Delta;SF improved the controller response because accelerate or smooth the controller as the control loop requires. The Fuzzy Sliding Mode Controller (FSMCr) is a completely general controller. The FSMCr was tested with two models of nonlinear process: mixing tank and neutralization reactor. In both cases the FSMCr improves the performance shown for other control strategies, as the industrial PID, the conventional Sliding Mode Control and the Standard Fuzzy Logic Controller. The second part of this research presents a new way to implement the Dynamic Matrix Control Algorithm (DMC). A Parametric structure of DMC (PDMC) control algorithm is proposed, allowing to the controller to adapt to process nonlinearities. For a standard DMC a process model is used to calculate de controller response. This model is a matrix calculated from the dynamic response of the process at open loop. In this case the process parameters are imbibed into the matrix. The parametric structure isolates the process parameters allowing adjust the model as the nonlinear process changes its behavior. A Fuzzy supervisor was developed to detect changes in the process and send that information to the PDMCr. The modeling error and other parameters related were used to estimate those changes. Some equations were developed to calculate the PDMCr tuning parameter, &lambda;, as a function of the process parameters. The performance of PDMCr was tested using to model of nonlinear process and compare with the standard DMC; in most the cases PDMCr presents less oscillations and tracks with less error the set point. Both control strategies presented in this research can be implemented into industrial applications easily.
Decoupling Constraint Validation from Business Activities to Improve Dependability in Distributed Object Systems
Authors: Lorenz Froihofer, Johannes Osrael, Karl M. Goeschka
Venue: Proceedings of the The Second International Conference on Availability, Reliability and Security (2007)

Integrity constraints are an important means to discover and specify application requirements. Although they are explicitly available and discussed during the system analysis and design phases, the constraint validation functionality is generally still tangled with other implementation code, e.g., the business logic, in today's systems. We contribute with an approach to decouple the integrity constraints from the business logic as well as the setpoints of constraint validation from the business activities. This allows us to balance dependability with respect to node and link failures by temporarily relaxing constraint consistency. Our prototype implementation indicates that this approach is typically worth its effort in systems where availability is of higher priority than strict consistency and a roll-forward approach to system repair, e.g., through compensating actions, is preferred over generic rollback-based solutions.
Genetic approach to pole placement by static output feedback
Authors: N. Sadati, S. Kuchakkhani
Venue: Proceedings of the Evolutionary Computation on 2002. CEC '02. Proceedings of the 2002 Congress - Volume 02 (2002)

In this paper, a new approach for solving the problem of pole assignment, using static output feedback, has been proposed. The proposed approach is based on genetic algorithm where it can place all the closed-loop poles at desired locations with a high accuracy, provided that there exists a solution to the problem. It is also shown that how some known difficulties of static output feedback like order of system, multiplicity of the desired poles and the need for having closed-loop poles to be distinct or different from the open loop poles have been solved. Numerical examples at the end of the paper illustrate the applicability and the performance of the proposed method.
On-line algorithms for computing mean and variance of interval data, and their use in intelligent systems
Authors: Vladik Kreinovich, Hung T. Nguyen, Berlin Wu
Venue: Information Sciences: an International Journal (2007)

When we have only interval ranges [x@?"i,x"i@?] of sample values x"1,...,x"n, what is the interval [V@?,V@?] of possible values for the variance V of these values? There are quadratic time algorithms for computing the exact lower bound V on the variance of interval data, and for computing V@? under reasonable easily verifiable conditions. The problem is that in real life, we often make additional measurements. In traditional statistics, if we have a new measurement result, we can modify the value of variance in constant time. In contrast, previously known algorithms for processing interval data required that, once a new data point is added, we start from the very beginning. In this paper, we describe new algorithms for statistical processing of interval data, algorithms in which adding a data point requires only O(n) computational steps.
Finite Generalized Gaussian Mixture Modeling and Applications to Image and Video Foreground Segmentation
Authors: Mohand Said Allili, Nizar Bouguila, Djemel Ziou
Venue: Proceedings of the Fourth Canadian Conference on Computer and Robot Vision (2007)

In this paper, we propose a finite mixture model of generalized Gaussian distributions (GDD) for robust segmentation and data modeling in the presence of noise and outliers. The model has more flexibility to adapt the shape of data and less sensibility for over-fitting the number of classes than the Gaussian mixture. In a first part of the present work, we propose a derivation of the Maximum-Likelihood estimation of the parameters of the new mixture model and we propose an information-theory based approach for the selection of the number of classes. In a second part, we propose some applications relating to image, motion and foreground segmentation to measure the performance of the new model in image data modeling with comparison to the Gaussian mixture.
Electronic transport through a T-shaped four-quantum dot system
Authors: Haitao Yin, Tianquan Lü, Hua Li, Zelong He
Venue: Microelectronics Journal (2007)

Making use of the equation of motion method and Keldysh Green's function technique, we have developed a calculation method by which an analytical formula for the current under dc bias is obtained and the transmission probabilities are numerically studied for a T-shaped four-quantum dot (QD) system connected to three terminals. The results are explained in terms of the localization properties of the confined states in the system.
Uncovering shared structures in multiclass classification
Authors: Yonatan Amit, Michael Fink, Nathan Srebro, Shimon Ullman
Venue: Proceedings of the 24th international conference on Machine learning (2007)

This paper suggests a method for multiclass learning with many classes by simultaneously learning shared characteristics common to the classes, and predictors for the classes in terms of these characteristics. We cast this as a convex optimization problem, using trace-norm regularization and study gradient-based optimization both for the linear case and the kernelized setting.
Stability and Uniqueness for the Crack Identification Problem
Authors: Zakaria Belhachmi, Dorin Bucur
Venue: SIAM Journal on Control and Optimization (2007)

This paper deals with the identifiability of nonsmooth defects by boundary measurements, and the stability of their detection. We introduce and analyze a new pointwise regularity concept at the boundary of an open set which turns out to play a crucial role in the identifiability of defects by two boundary measurements. As a consequence, we prove the unique identifiability for a large class of closed sets, including sets with an infinite number of connected components of positive capacity and totally disconnected sets. In order to rigorously justify numerical approximation results of defects by optimal design methods, we prove a geometric stability result of the defect identification process, without any a priori smoothness assumptions.
Voice conversion using partitions of spectral feature space
Authors: W. Verhelst, J. Mertens
Venue: Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 01 (1996)

Given a set of utterances that have been spoken by two speakers, the problem of voice conversion consists in constructing some sort of transformation that can be applied on any utterance of the first speaker and makes the result appear to have been spoken by the second speaker. Conversion rules for the vocal tract spectral characteristics, which are usually trained on individual subsets of a partition of the spectral feature space, still do not reach the desired level of accuracy. The paper presents an analysis of the problem.
Method of Measuring VoIP Traffic Fluctuation with Selective sFlow
Authors: Atsushi Kobayashi, Katsuyasu Toyama
Venue: Proceedings of the 2007 International Symposium on Applications and the Internet Workshops (2007)

We present a method of measuring VoIP traffic fluctuation by using Netflow or sFlow. As the traffic of critical applications such as VoIP has increased in backbone networks, network operators need to measure the QoS performance of traffic in real networks more easily and passively. We have studied the delay and fluctuation of VoIP traffic in a real network and focused on traffic fluctuation that can be measured at one observation point. We evaluated the effectiveness of this method using selective sFlow, which has been implemented in a commercial router.
Utility-Based Enhanced Priority Scheduler for Differentiated Services
Authors: Nestor Michael C. Tiglao
Venue: Proceedings of the First Asia International Conference on Modelling & Simulation (2007)

Differentiated Services (DiffServ) is a QoS architecture that seeks to provide service differentiation to a small number of service classes. Priority queuing (PRIQ), a scheduling mechanism that provides a fixed number of priority levels to different service classes, can be used for DiffServ provisioning. However, it has the inherent problem of starvation in the lower priority classes. A new framework, Value- Based Utility (VBU), models the perceived knowledge of the state and degree of user satisfaction in managing router resources and functions. We propose the use of the VBU framework to improve the PRIQ mechanism. We designed and implemented an enhanced PRIQmechanism which uses packet remarking on an ALTQ router. Our results show that our mechanism effectively improves the performance in the low priority class while maintaining the QoS guarantees of the higher priority classes.
A Rapid Fault Injection Approach for Measuring SEU Sensitivity in Complex Processors
Authors: Marta Portela-Garcia, Celia Lopez-Ongil, Mario Garcia-Valderas, Luis Entrena
Venue: Proceedings of the 13th IEEE International On-Line Testing Symposium (2007)

Processors are very common components in current digital systems and to assess their reliability is an essential task during the design process. In this paper a new fault injection solution to measure SEU sensitivity in processors is presented. It consists in a hardware-implemented module that performs fault injection through the available JTAG-based On-Chip Debugger (OCD). It can be widely applicable to different processors since JTAG standard is an extended interface and OCDs are usually available in current processors. The hardware implementation avoids the communication between the target system and the software debugging tool. The method has been applied to a complex processor, the ARM7TDMI. Results illustrate the approach is a fast, efficient and cost-effective solution.
GeNMSim: the agent simulator
Authors: Ilana Gani-Naor, Ehud Margolin, Raz Rafaeli
Venue: Proceedings of the 5th conference on Annual Tcl/Tk Workshop 1997 - Volume 5 (1997)

Network Management (NMS) application vendors, often encounter a situation where the device being managed or tested (which includes an SNMP agent) is not available at the time of the NMS application development, whereupon this becomes the critical path in the development cycle of the new device. To shorten this critical path, we've developed GeNMSim, which is a Tcl/Tk based Multi Platform SNMP agent simulator. The main features of GeNMSim are user customisation using Tcl callbacks, Portability across Unix and Win-dow95/NT platforms and automatic creation of the simulator database by a set of Tcl based tools. GeNMSim is a commercial product targeted at Data Communication and Telecommunication companies involved in SNMP development.
Assessing students' and professors' attitudes toward the use of computer-based technology in the classroom: a case study at the university of jordan
Authors: William Rideout
Venue:  (2006)

This study investigated professors' and students' attitudes toward computer technology at the University of Jordan during the spring semester, 2005. The Computer Attitude Scale (CAS), developed by Loyd and Gressard, (1984) was used to gather information regarding participants' attitudes measured in terms of confidence, liking, perceived usefulness, and anxiety toward computers. The students' demographics---gender and age---and computer-related experience, skills/knowledge, and weekly use were examined as possible determinants of their attitudes. For professors, experience, skills/knowledge, and ownership of/access to a computer, were studied as factors. Seven hundred students and a hundred and fifty professors were surveyed. The results of the data analysis indicated a significant correlation between students' attitudes toward computers in terms of confidence, liking, perceived usefulness, and anxiety, on the one hand, and computer-related experience, skills/knowledge, and weekly use, on the other. Similarly, the study found a strong correlation between professors' attitudes measured with the same variables, and levels of experience, skills/knowledge, and ownership of/access to a computer. Those students and professors who used computers more frequently and had more than a year of computer experience had the most positive attitudes toward computers on all (CAS) subscale. While age played no role, this study found gender to be an important factor in students' attitudes toward computer technology, with male students showing a more positive attitude. Overall, both students and professors had a positive attitude toward computers.
Reputation Management Techniques in DHT-Based Peer-to-Peer Networks
Authors: Natalya Fedotova, Marco Bertucci, Luca Veltri
Venue: Proceedings of the Second International Conference on Internet and Web Applications and Services (2007)

Reputation evaluation and trust management techniques are successfully used in the peer-to-peer (P2P) environment due to its notable similarity to the human community. These techniques present a quite efficient solution to cope with some types of malicious activity in P2P networks. Recently, a great number of P2P platforms use Distributed Hash Table (DHT) -based overlay-networks that provide effective lookup and storage mechanisms. However, DHT-based networks are a subject to some particular types of attacks. In this paper we present an analysis of applicability of some reputation evaluation techniques as protection from the malicious activity in DHT-based networks.
AVC Intraprediction Mode Decision Based on 4x4 Integer Transform Coefficients
Authors: Florian Obermeier, Marko Durkovic, Michael Zwick, Klaus Diepold
Venue: Proceedings of the Eight International Workshop on Image Analysis for Multimedia Interactive Services (2007)

In order to achieve AVCs full potential in intracoding efficiency an encoder must choose an appropriate coding option for each block in every frame. This leads to a significant computational effort. In this paper, we investigate employing the AVC 4x4 integer transform in order to decide intraprediction size and mode for AVC encoding in an efficient manner. The transform is used to constrain the encoding options with a feasible overhead, as it can be implemented using shifts and additions only.
AffyMiner - a Tool for Significant Gene Mining in Affymetrix GeneChip Microarray Data
Authors: Guoqing Lu, The Nguyen, Yuannan Xia, Zhaoyi Wang, Mike Fromm
Venue: Proceedings of the 40th Annual Hawaii International Conference on System Sciences (2007)

Microarray technology has revolutionized molecular biology. The challenge associated with this high-throughput technology is how to analyze and make biological sense of a large amount of microarray data. We introduce AffyMiner, a tool developed for detecting differentially expressed genes from Affymetrix GeneChip microarray data and connecting gene annotation and gene ontology information with the genes detected. AffyMiner consists of three functional modules: GeneFinder for finding significant genes in a treatment versus control experiment; GOTree for mapping genes of interest onto the Gene Ontology (GO) space; and interfaces for running Cluster, a program for clustering analysis, and GenMAPP, a program for pathway analysis. AffyMiner effectively deals with multiple replicates in the experiment, provides users the flexibility of choosing different data metrics for finding differentially expressed genes, and is capable of incorporating various gene annotations. AffyMiner has been used for the analysis of GeneChip data described in several publications and has been found to reduce the time and effort needed to compare data from multiple arrays and to interpret the results in terms of gene and cell functions.
A Proposal of Indexing Conference Movies with Thinking States
Authors: Akihiro Miyata, Takefumi Hayashi, Shota Yamamoto, Masaki Hayashi, Hiroshi Shigeno, Kenichi Okada
Venue: Proceedings of the Fifth International Conference on Creating, Connecting and Collaborating through Computing (2007)

In this paper, we propose indexing conference movies with thinking states. Currently, one of reasons why conference movies do not represent participants' thinking states is that existing ways do not place emphasis on recoding participants' concentration and interest. To address this issue, we define MS-Level (Mental State Level) derived from one's beta wave (a part of brainwave) as an indicator of depth of thinking, and index conference movies with MS-Index (Mental State Index). 3 experiments have been conducted to evaluate our proposition using a prototype system consisting of a movie player with MS-Indices. We conclude that our proposal will contribute to a better understanding of participants' thinking states during conferences, and users can find scenes in which participants think well or not.
Formal ReSpecT in the A&A Perspective
Authors: Andrea Omicini
Venue: Electronic Notes in Theoretical Computer Science (ENTCS) (2007)

Coordination models and languages have found a new course in the context of MAS (multiagent systems). By re-interpreting results in terms of agent-oriented abstractions, new conceptual spaces are found, which extend the reach of coordination techniques far beyond their original scope. This is for instance the case of coordination media, when recasted in terms of coordination artifacts in the MAS context. In this paper, we take the well-established ReSpecT language for programming tuple centre behaviour, and adopt the A&A (agents and artifacts) meta-model as a perspective to reinterpret, revise, extend and complete it. A formal model of the so-called A&A ReSpecT language is presented, along with an example illustrating its use for MAS coordination.
Automated Test Generation for Access Control Policies via Change-Impact Analysis
Authors: Evan Martin, Tao Xie
Venue: Proceedings of the 29th International Conference on Software Engineering Workshops (2007)

Access control policies are increasingly written in speci- fication languages such as XACML. To increase confidence in the correctness of specified policies, policy developers can conduct policy testing with some typical test inputs (in the form of requests) and check test outputs (in the form of responses) against expected ones. Unfortunately, manual test generation is tedious and manually generated tests are often not sufficient to exercise various policy behaviors. In this paper we present a novel framework and its support- ing tool called Cirg that generates tests based on change- impact analysis. Our experimental results show that Cirg can effectively generate tests to achieve high structural cov- erage of policies and outperforms random test generation in terms of structural coverage and fault-detection capability.
On selection of nonmultiplicative prolongations in computation of Janet bases
Authors: V. P. Gerdt, Yu. A. Blinkov
Venue: Programming and Computing Software (2007)

We consider three modifications of our basic involutive algorithm for computing polynomial Janet bases. These modifications, which are related to degree-compatible monomial orders, yield specific selection strategies for nonmultiplicative prolongations. Using a standard database of benchmarks designed for testing programs computing Gröbner bases, we compare these algorithmic modifications (in terms of their efficiency) with Faugére's F 4 algorithm, which is built in the Magma computer algebra system.
OFDM subcarrier selection for real-time wireless communication
Authors: A. Kamikura, N. Okada, M. Nakagawa
Venue: Proceedings of the The 8th International Conference on Communication Systems - Volume 01 (2002)

Recently, networks have come to be used for human support such as remote control of robots. In remote control, haptic and picture information are needed. Haptic information is local, and it must be transmitted instantly. However, in conventional wireless communication, long delay exists. We proposed OFDM subcarrier selection for real-time wireless communication. In transmission, data are separated into hard real-time and soft real-time. For hard real-time, time interleaving is not used, and subcarriers that have high received power were allocated. By computer simulations, it was shown than real-time wireless communication was possible.
Cost-aware capacity optimization in dynamic multi-hop WSNs
Authors: Jukka Suhonen, Mikko Kohvakka, Mauri Kuorilehto, Marko Hännikäinen, Timo D. Hämäläinen
Venue: Proceedings of the conference on Design, automation and test in Europe (2007)

Low energy consumption and load balancing are required for enhancing lifetime at Wireless Sensor Networks (WSN). In addition, network dynamics and different delay, throughput, and reliability requirements demand cost-aware traffic adaptation. This paper presents a novel capacity optimization algorithm targeted at locally synchronized, low-duty cycle WSN MACs. The algorithm balances the traffic load between contention and contention free channel access. The energy-inefficient contention access is avoided, whereas the more reliable contention free access is preferred. The algorithm allows making cost-aware trade-off between delay, energy-efficiency, and throughput guided by routing layer. Analysis results show that the algorithm has 10% to 100% better energy-efficiency than IEEE 802.15.4 LR-WPAN in a typical sensing application, while providing comparable goodput and delay.