ppxscal/embedding_network huggingface dataset:
Comments on "stability analysis of a class of nonlinear fractional-order systems"
Authors: Mohammad Saleh Tavazoei
Venue: IEEE Transactions on Circuits and Systems II: Express Briefs (2009)

It has been pointed out that the numerical simulation results presented in the above paper are not consistent with reality. The reason for this inconsistency has analytically been clarified in this note.
Asymptotic results for batch-variance methods in simulation output analysis
Authors: Huifen Chen, Chia-Shuen Yeh
Venue: Computers and Industrial Engineering (2005)

We consider the batching methods for estimating the variance of the sample variance based on steady-state correlated data. Intensive research has been devoted to the problem of estimating the variance of the sample mean, but little to the sample variance when the desired performance measure is the population variance. The batch-variance estimator (for the variance of the sample variance) is a function of the batch variances, which are the sample variances of the batched data. By viewing the sample variance as a sample mean of squared terms, we show that the asymptotic results for the batch-variance and batch-mean estimators are analogous in two ways. First, both have the same convergence rates. Second, whether batch means or batch variances are employed, a single rule applies to both multipliers in the asymptotic formula. The constant multipliers are the same, and the other multipliers depend on the data properties, which are analogous for batch variances and batch means with squared terms. We prove these results analytically for the nonoverlapping batch-variance method and argue that they can be extended to cover the overlapping batch-variance method.
Fault Diagnosis Based on Particle Swarm Optimization by Artificial Immunisation Algorithm
Authors: Chu-Jiao Wang, Shi-Xiong Xia, Hong-Peng Xuan
Venue: Proceedings of the 2009 International Conference on Multimedia Information Networking and Security - Volume 02 (2009)

Particle swarm optimization (PSO) is a new general machine-learning tool under the evolutionary algorithms (EAs) and gained lots of attention in various engineering applications, this paper presents an intelligent methodology for diagnosing incipient faults in mine hoist. Artificial immunisation algorithm (AIA) is used to optimise the parameters in PSO in this paper. The AIA is a new optimisation method based on the biologic immune principle of human being and other living beings. It can effectively avoid the premature convergence and guarantees the variety of solution. With the parameters optimised by AIA, the total capability of the PSO classifier is improved. The fault diagnosis of mine hosit shows that the PSO optimised by AIA can give higher recognition accuracy than the normal PSO.
Maintenance scheduling and production control of multiple-machine manufacturing systems
Authors: A. Gharbi, J. -P. Kenné
Venue: Computers and Industrial Engineering (2005)

This paper deals with the production and preventive maintenance control problem for a multiple-machine manufacturing system. The objective of such a problem is to find the production and preventive maintenance rates for the machines so as to minimize the total cost of inventory/backlog, repair and preventive maintenance. A two-level hierarchical control model is presented, and the structure of the control policy for both identical and non-identical manufacturing systems is described using parameters, referred to here as input factors. By combining analytical formalism with simulation-based statistical tools such as experimental design and response surface methodology, an approximation of the optimal control policies and values of input factors are determined. The results obtained extend those available in existing literature to cover non-identical machine manufacturing systems. A numerical example and a sensitivity analysis are presented in order to illustrate the robustness of the proposed approach. The extension of the proposed production and preventive maintenance policies to cover large systems (multiple machines, multiple products) is discussed.
Extended maximizing unavailability interval (eMUI): maximizing energy saving in IEEE 802.16e for mixing type I and type II PSCs
Authors: Tuan-Che Chen, Jyh-Cheng Chen
Venue: IEEE Communications Letters (2009)

To conserve energy in IEEE 802.16e, earlier, we proposed Maximizing Unavailability Interval (MUI) for Type II Power Saving Class (PSC). MUI is guaranteed to find the maximum unavailability interval. Therefore, energy consumption can be reduced significantly. In this paper, we further extend MUI for the mixture of Type I and Type II PSCs. The proposed eMUI still can achieve maximum unavailability interval. The simulation results show that the proposed eMUI reduces energy consumption and average packet response time.
Smooth vs. pieced-interval dynamic modeling of impulsive events in multibody mechanical systems
Authors: Y. A. Khulief
Venue: Proceedings of the IASTED Asian Conference on Modelling and Simulation (2007)

Impulsive responses often arise in mechanical systems due to collision, impact, joint clearances, machine tool interaction, and material handling processes. Impulsive events take place during very short-lived intervals, and are normally associated with redistribution of momentum. The redistribution of momentum may take place instantaneously or during a very short interval, thus giving rise to discontinuities in the system's velocities. In this context, two modeling approaches are presented. The first approach adopts a smooth representation over the short-lived interval. In this case, the impulsive event is modeled while taking into consideration the mechanics of the contacting bodies. The second is a discontinuous dynamic model, in which the impulsive event is assumed to take place at an instant of time. The corresponding instantaneous redistribution of momentum results in jump discontinuities in the system's velocities, which are calculated to update the system state vector for starting the next interval. The merits of the two modeling approaches are stated in the light of numerical simulations.
Preamble allocation scheme using trajectory information for mobile relay stations
Authors: Hanjin Lee, Dongwook Kim, Hyunsoo Yoon
Venue: IEEE Communications Letters (2009)

We propose a novel preamble allocation scheme for mobile relay stations (MRS) in order to reduce the occurrence of preamble collision. We calculate the probability of preamble collision based on trajectory information of MRSs. Then, we select a preamble considering not only the probability of preamble collision but also interference from other base stations (BS) and relay stations (RS). Simulation results show that the proposed scheme significantly reduces the occurrence of preamble collision.
Time series forecasting with Qubit Neural Networks
Authors: Carlos R. B. Azevedo, Tiago A. E. Ferreira
Venue: Proceedings of The Eleventh IASTED International Conference on Artificial Intelligence and Soft Computing (2007)

This paper proposes a quantum learning scheme approach for time series forecasting, through the application of the new non-standard Qubit Neural Network (QNN) model. The QNN description was adapted in this work in order to resemble classical Artificial Neural Networks (ANNs). Three stock market series were predicted. The results are discussed over several statistics and are compared with ANNs experiments with equivalent degrees of freedom.
Going off-road: transversal complexity in road networks
Authors: David Eppstein, Michael T. Goodrich, Lowell Trott
Venue: Proceedings of the 17th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (2009)

A geometric graph is a graph embedded in the plane with vertices at points and edges drawn as curves (which are usually straight line segments) between those points. The average transversal complexity of a geometric graph is the number of edges of that graph that are crossed by random line or line segment. In this paper, we study the average transversal complexity of road networks. By viewing road networks as multiscale-dispersed graphs, we show that a random line will cross the edges of such a graph O(&radic;n) times on average. In addition, we provide by empirical evidence from experiments on the road networks of the fifty states of United States and the District of Columbia that this bound holds in practice and has a small constant factor. Combining this result with data structuring techniques from computational geometry, allows us to show that we can then do point location and ray-shooting navigational queries with respect to road networks in O(&radic;n log n) expected time. Finally, we provide empirical justification for this claim as well.
On Objectives of Instructional Laboratories, Individual Assessment, and Use of Collaborative Remote Laboratories
Authors: Ingvar Gustavsson, Kristian Nilsson, Johan Zackrisson, Javier Garcia-Zubia, Unai Hernandez-Jayo, Andrew Nafalski, Zorica Nedic, Ozdemir Gol, Jan Machotka, Mats I. Pettersson, Thomas Lago, Lars Hakansson
Venue: IEEE Transactions on Learning Technologies (2009)

Three key issues should be addressed to enable universities to deliver engineers who have a solid documented laboratory experience enabling them to design goods and services complying with the requirements of a sustainable society. First, introduce learning objectives of engineering instructional laboratories in courses including laboratory components. Second, implement individual student assessment. Third, introduce free access to online experimental resources as a supplement to the equipment in traditional laboratories. Blekinge Institute of Technology (BTH) in Sweden and the University of South Australia (UniSA) have created online laboratory workbenches for electrical experiments that mimic traditional ones by combining virtual and physical reality. Online workbenches not only supplement traditional ones, but they can also be used for low-cost individual assessment. BTH has started a project disseminating the BTH workbench concept, The Virtual Instrument Systems in Reality (VISIR) Open Laboratory Platform, and invites other universities to set up replicas and participate in further development and standardization. Further, online workbenches offer additional learning possibilities. UniSA has started a project where students located in different countries can perform experiments together as a way to enhance the participants' intercultural competence. This paper discusses online laboratory workbenches and their role in an engineering education appropriate for a sustainable society.
Two-staged informed dynamic scheduling for sequential belief propagation decoding of LDPC codes
Authors: Saejoon Kim, Karam Ko, Jun Heo, Ji-Hwan Kim
Venue: IEEE Communications Letters (2009)

Recent studies have shown that sequential belief propagation decoding of low-density parity-check codes can increase the decoding convergence speed while simultaneously improving the asymptotic performance compared to the conventional flooding scheme. Two of the practical sequential decoding schemes known are the ones by Casado et al. [1] in which informed dynamic scheduling is used for scheduling the sequential updates of the messages. In this letter, we propose a two-staged informed dynamic scheduling that unifies and outperforms the two schemes of [1].
A relational database for the monitoring and analysis of watershed hydrologic functions: II. Data manipulation and retrieval programs
Authors: Christian J. Carleton, Randy A. Dahlgren, Kenneth W. Tate
Venue: Computers Geosciences (2005)

With increasing hydrologic and water quality data being collected for monitoring and research purposes, it has become evident that storing data in traditional spreadsheet formats are no longer a practical means of managing these large datasets. The Watershed Monitoring and Analysis Database (WMAD) was developed to ease the burden of handling watershed-scale hydrology, water quality, and meteorology data. WMAD is a relational database designed to make the management of large hydrologic datasets more efficient and less prone to manipulation errors. However, this increased efficiency comes at the cost of needing to understand relational database engines, including the ability to write queries to retrieve data. To facilitate the use of WMAD, we have applied the WMAD structure using the Microsoft Access database application. Separate WMAD applications were developed within the Access environment that allow users to access and manage data without having to understand details of the database. These applications are graphically based and allow the user to perform a series of tasks including: data import, data management, basic calculations, and data export. A constituent flux or load calculation was developed to perform flux calculations using a time-weighted algorithm. This paper highlights these applications and their tasks to assist new WMAD users in quickly becoming proficient in using WMAD for data management.
An improved ranging algorithm for ad-hoc relay networks over IEEE 802.16 OFDMA systems
Authors: Woo-Geun Ahn, Hyung-Myung Kim
Venue: IEEE Communications Letters (2009)

We present a novel ranging scheme with a specific notification code to reduce the complexity of ranging detection while providing a sufficient ranging opportunity for small ranging success time (RST) in ad-hoc relay (AHR) networks over IEEE 802.16 OFDMA systems. Computational complexity and RST are analyzed. The simulation results show that the proposed scheme outperforms the conventional one and can be a good choice for ranging protocol in battery-powered AHR networks.
Joint channel- and queue-aware scheduling for multiuser diversity in wireless OFDMA networks
Authors: Guocong Song, Ye Li, Leonard J. Cimini
Venue: IEEE Transactions on Communications (2009)

In this paper, packet scheduling in an orthogonal frequency division multiplex access downlink is investigated based on cross-layer design and optimization. We first develop max-delay-utility scheduling with the help of channel and queue state information to exploit multiuser diversity and guarantee quality of service. The stability property of a scheduling policy is characterized by the stability region, which is the largest region on arrival rates for which the queueing system can be stabilized by the scheduling policy. It is shown in this paper that under very loose conditions, the max-delay-utility scheduling has the maximum stability region. In environments with insufficient scattering or strong line-of-sight components, delay transmit diversity can increase the fluctuation in the frequency domain to improve the performance. The simulation results show that the max-delay-utility scheduling with a frugality constraint is highly advantageous to data transmission with a low latency requirement over shared multiple channels, and that joint scheduling and power allocation can substantially boost the performance.
Comments on "Power controlled channel allocation for multiuser multiband UWB systems"
Authors: Deqiang Wang, Yewen Cao
Venue: IEEE Transactions on Wireless Communications (2009)

In this note, two typos in above-mentioned paper are pointed out and a sufficient condition to ensure the PER requirement in the optimization problem is provided.
A configurable MIPS simulator for teaching computer architecture
Authors: Muhammad Jahangir Ikram
Venue: Proceedings of the 10th IASTED International Conference on Computers and Advanced Technology in Education (2007)

We present Visual-MIPS, a new tool for MIPS processor simulation, which adds a new dimension to teaching of computer architecture. Unlike many available tools for MIPS processor simulation such as SPIM [1], visual MIPS is fully configurable and can be used to teach subtle differences between processor architectures. There are a number of other tools that have been developed for simulating MIPS processor for education [2], [3] but they mainly focus on a fixed processor configuration. In the first experiment, single cycle configuration is used which allows study of processor behaviour for basic instructions as described in [4], [5]. For pipeline studies we have designed three experiments. In the first experiment, students study basic pipelined processor and discover problems with pipelining. Students are gradually asked to introduce hazard detection and forwarding logic. Next two experiments focus on branch hazards. By choosing different static branch strategies, e.g., flush pipeline, predict not taken, delayed branching and cancelled branching, they can write their own simple routines and run them on many different processor configurations. The real challenge has been the simulator to work correctly for all different configurations. This tool is especially useful for understanding and solving problems in course textbooks [4], [5].
Short note: Runoff mapping using WEPP erosion model and GIS tools
Authors: Quirijn de Jong van Lier, Gerd Sparovek, Dennis C. Flanagan, Elke M. Bloem, Ewald Schnug
Venue: Computers Geosciences (2005)

Soil erosion, associated with environmental impacts and crop productivity loss, is usually considered the most impacting of surface hydrology processes. Runoff plays a major role in the erosion process, but it is also important by itself as it directly influences several surface hydrologic processes. In this paper, a computer interface (Erosion Database Interface, EDI) is described that allows processing the surface hydrology output database of the Water Erosion Prediction Project (WEPP) erosion prediction model, resulting in a georeferenced estimation of runoff. WEPP output contains non-georeferenced daily information about estimated runoff at the lower end of each Overland Flow Element. EDI, when running with WEPP, allows extracting WEPP-calculated runoff values, transforming them into annual means and relocating them in a georeferenced database readable by Geographic Information Systems (GIS). EDI was applied to a 1990ha watershed in southeast Brazil, with vegetation of mainly sugarcane, forest, and pasture. A 100-year climate simulation was used as input to WEPP, and erosion values were calculated at about six points per hectare and interpolated to a raster format. EDI was successful in preparing the database for automatic calculation of erosion and hydrologic parameters with WEPP and to restore georeferences to mean annual accumulated runoff data that were imported in the GIS as a vector database. Of all the resulting maps, the runoff map is the one that integrates all of the input parameters required for WEPP simulation, thus reflecting not only the physical environment but also crop growth and management and tillage operations. A very small correlation between runoff and erosion shows them to behave independently. Moreover, it is concluded that on analyzing runoff related to agricultural management, georeferenced runoff studies are especially important. In this context, EDI may be a useful tool to assess the effect of tillage and crop management on runoff production.
Cryptanalysis on Majority-Voting Based Self-Recovery Watermarking Scheme
Authors: Hongjie He, Jiashu Zhang
Venue: Proceedings of the 2009 International Conference on Multimedia Information Networking and Security - Volume 01 (2009)

In 2007, Wang-Chen proposed a majority-voting based self-recovery watermarking scheme, in which the additional authentication watermark of each block was embedded in the less significant bits and used to examine the authenticity of the same block. In this paper we examine the security of the Wang-Chen self-recovery watermarking scheme and show that it is vulnerable to the proposed XOR-equivalent attack. Specifically, given a watermarked image, one can forge a valid authentication watermark in any image by the proposed XOR-equivalent attack. Experimental results are given to support our conclusions and demonstrate that our attack is successful in forging watermarked image. This implies that it is insecure to detect the validity of image block only by the additive authentication watermark in self-recovery watermarking techniques.
A new loss compensation technique for CMOS distributed amplifiers
Authors: Kambiz Moez, Mohamed Elmasry
Venue: IEEE Transactions on Circuits and Systems II: Express Briefs (2009)

This brief presents a circuit technique to compensate for the metal and substrate loss of the on-chip transmission lines (TLs), and, consequently, to improve the gain flatness and bandwidth of CMOS distributed amplifiers (DAs). An eight-stage DA suitable for 40-Gb/s optical communication is devised and implemented in a 0.13-µm CMOS process. The DA achieves a flat gain of 10 dB from dc to 44 GHz with an input and output matching better than -8 dB. The measured noise figure varies from 2.5 to 7.5 dB with the amplifier's band. The proposed DA dissipates 103 mW from two 1-V and 1.2-V dc supplies.
Comparing predicted and observed spatial boundaries of geologic phenomena: Automated Proximity and Conformity Analysis applied to ice sheet reconstructions
Authors: Jacob Napieralski, Yingkui Li, Jon Harbor
Venue: Computers Geosciences (2006)

Comparing predicted with observed geologic data is a central element of many aspects of research in the geosciences, e.g., comparing numerical ice sheet models with geomorphic data to test ice sheet model parameters and accuracy. However, the ability to verify predictions using empirical data has been limited by the lack of objective techniques that provide systematic comparison and statistical assessment of the goodness of correspondence between predictions of spatial and temporal patterns of geologic phenomena and the field evidence. Much of this problem arises from the inability to quantify the level of agreement between straight or curvilinear features, such as between the modeled extent of some geologic phenomenon and the field evidence for the extent of the phenomenon. Automated Proximity and Conformity Analysis (APCA) addresses this challenge using a system of Geographic Information System-based buffering that determines the general proximity and parallel conformity between linear features. APCA results indicate which modeled output fits empirical data, based on the distance and angle between features. As a result, various model outputs can be sorted according to overall level of agreement by comparison with one or multiple features from field evidence, based on proximity and conformity values. In an example application drawn from glacial geomorphology, APCA is integrated into an overall model verification process that includes matching modeled ice sheets to known marginal positions and ice flow directions, among other parameters. APCA is not limited to ice sheet or glacier models, but can be applied to many geoscience areas where the extent or geometry of modeled results need to be compared against field observations, such as debris flows, tsunami run-out, lava flows, or flood extents.