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检索条件"主题词=software algorithms"

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Optimization of County-Level Highway Construction Organization Network Resources Based on Multi-Objective Evolutionary Algorithm

Optimization of County-Level Highway Construction Organizati...

引用

software Engineering, Social Network Analysis and Intelligent Computing (SSAIC), Asia-Pacific Conference on

作者： Quansheng Wang Zhuo Xing Tongliao Horqin District Inner Mongolia Local Road Maintenance Center Tongliao InnerMongolia China Horqin District No.2 Middle School Tongliao Inner Mongolia Tongliao InnerMongolia China

ISBN: (数字)9798350393682

ISBN: (纸本)9798350393699

In order to scientifically solve the comprehensive optimization problem of highway construction project network plan, aiming at the problems and deficiencies existing in the traditional highway construction network map optimization, this paper uses heuristic search algorithm and genetic algorithm to optimize and adjust the network plan of highway construction network optimization from three aspects of time, cost and resources, and establishes the corresponding mathematical model, At the same time, for the first time, from the perspective of the maximum benefit of highway engineering project, this paper attempts to comprehensively optimize the network diagram by considering three factors of time, cost and resources, establishes the corresponding mathematical model, and gives the specific solution method. Starting from the research on the geographical characteristics of Yuncheng City, integrating regional highway resources, this paper makes a beneficial discussion on the optimization of the network, level and cycle of township and organic villages connecting county and township roads, so as to improve the overall service level of the highway network to rural areas, so as to achieve the goal of township connecting class II and county-level roads, and organic villages connecting class IV and township-level roads.

关键词： Costs Social networking (online) Roads Optimization models Heuristic algorithms Urban areas software algorithms

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High-level data mapping for clusters of SMPs

High-level data mapping for clusters of SMPs

引用

International Symposium on Parallel and Distributed Processing (IPDPS)

作者： S. Benkner T. Brandes Institute for Software Science University of Technology Vienna Austria GMD-German National Research Center for Information Technology SCAI-Institute for Algorithms and Scientific Computing Saint Petersburg Russia

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Non-stationary link inference and localization in communication networks

Non-stationary link inference and localization in communicat...

引用

IEEE Symposium on Computers and Communications (ISCC)

作者： Ran Gu Yan Qiao Xue-song Qiu State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China

Existing network link estimation methods generally assume that the network link status in the measurement is stationary, but this assumption is not always true in the real network. Thus they cannot provide desired estimation accuracies. To address the problem, in this paper, we propose a new methodology, which can accurately infer the packet loss rates of all links in the network and locate the non-stationary links. Through software simulation, we compare our method with a former inference algorithm (LIA). Experimental results show that the new algorithm can provide higher inference accuracy within the same computing time.

关键词： Inference algorithms Probes Mathematical model Accuracy Equations software algorithms Tomography

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A deeply integrated adaptive GPS-based navigator with extended range code tracking

A deeply integrated adaptive GPS-based navigator with extend...

引用

IEEE Symposium on Position Location and Navigation (PLANS)

作者： D. Gustafson J. Dowdle K. Flueckiger Charles Stark Draper Laboratories Inc. USA

This paper presents a new approach to GPS-based navigation which offers significant improvement in antijam capability over traditional designs. The algorithms may be implemented at low cost in software in existing and future GPS receivers using, as inputs, postcorrelation I and Q data and, optionally, raw data from other sensors. Traditional systems are not optimal at high jammer-to-signal (J/S) ratios as a consequence of modular design, use of traditional fixed-gain or gain-scheduled tracking loops, and use of artificial moding logic. The approach described here employs a nonlinear filter that operates efficiently at all J/S levels. Filter gains continuously adapt to changes in the J/S environment, and the error covariance propagation is driven directly by measurements to enhance robustness under high jamming and dynamics conditions. Extended-range correlation may be optionally included to increase the code tracking loss-of-lock threshold under high jamming scenarios. Computational complexity is comparable to an extended Kalman filter. Results of hardware-in-the-loop simulations are presented which demonstrate improvements of 15 dB or more in antijam capability relative to traditional designs.

关键词： Navigation Jamming software algorithms Costs Global Positioning System Tracking loops Logic design Nonlinear filters Gain measurement Robustness

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Dynamic programming optimization algorithm applied in test case selection

Dynamic programming optimization algorithm applied in test c...

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International Symposium on Electronics and Telecommunications (ISETC)

作者： Ovidiu Banias Automation and Applied Informatics Department Politehnica University of Timisoara Timisoara Romania

In this paper we propose a quadratic dynamic programming algorithm applied in software testing domain, more specific in the test case selection decision making. We addressed a specific problem in software testing: running a subset of test cases from the whole set of available test cases in a limited time frame with the goal of maximizing the chances of finding potential defects. We employed both objective methods as the dynamic programming algorithm and subjective and empiric human decision as defining the selection and prioritization criteria. The proposed solution is suited for medium to large projects where in the worst-case scenarios the memory space complexity of the proposed algorithm does not exceed the order of GBytes. The proposed optimization algorithm is presented in pseudocode along with the dynamic programming recurrence formula and potential selection criteria as currently used in the industry.

关键词： Heuristic algorithms Dynamic programming Optimization Complexity theory software algorithms Decision making Industries

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Adjustment of Mutant Vector Elements of the Differential Evolution Method as Applied to Solving the Problem of Power Shortage Minimization of Electric Power Systems

Adjustment of Mutant Vector Elements of the Differential Evo...

引用

IEEE Region 8 International Conference on Computational Technologies in Electrical and Electronics Engineering, SIBIRCON

作者： Dmitrii Iakubovskii Dmitry Krupenev Denis Boyarkin Energy Security Department Reliability Of Fuel And Energy Supply Laboratory Melentiev Energy Systems Institute of Siberian Branch of the Russian Academy of Sciences Irkutsk Russia

ISBN: (纸本)9781665464819

The adequacy assessment is a topical tool for planning the progress of electric power systems and includes several important calculation steps, namely: the formation of random states, minimization of power shortages, and determination of reliability indicators. Modern software complexes use various types of models for minimizing power shortages, flow, including linear and non-linear models, as well as appropriate methods for solving problems based on these models. In current paper, differential evolution methods are used to solve nonlinear problems, and three options for adapting the known differential evolution algorithms DE, aDE and jDE to solving the problems are considered. An important part of the work is the analysis of existing and proposed options for modifying the mutation process. Which can be used in the above methods. The main changes include an additional check of compliance of mutant vectors with upper and lower constrains, and in case of their discrepancy, three options for correcting mutant vectors are considered. The experiments performed involved 3 and 7 node systems and showed the advantage of the implemented methods using the correction of the elements of mutant vectors in the form of an increase in the speed of solving problems up to 47% relative to the existing correction method. (Abstract)

关键词： Adaptation models Heuristic algorithms software algorithms Minimization Reliability engineering software Power system reliability

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A unified method for fault location in multi-voltage microgrids

A unified method for fault location in multi-voltage microgr...

引用

Power and Energy Conference at Illinois (PECI)

作者： Ahmed M. Hanafy Karim H. Youssef Nabil H. Abbasy Alexandria University Alexandria Egypt

ISBN: (纸本)9781728186481;9781728186498

This paper introduces a novel fault location method suitable for multi-voltage level microgrids using a unified set of equations. The proposed method depends on constructing the bus impedance matrix between the fault point and the nearest bus using the measurements of MicroPMUs located at both buses of the faulted line. To introduce a complete protection algorithm, the proposed fault location method is combined with a previously introduced fault detection method. The proposed complete protection algorithm can accurately detect and locate any type of faults in both islanded and grid-connected modes considering economical implementation. Finally, the proposed algorithm is tested using MATLAB and ETAP software for symmetrical and asymmetrical faults in multi-level microgrids and found effective in any configuration.

关键词： Power measurement Voltage measurement Fault detection software algorithms Measurement uncertainty Energy measurement Microgrids

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Open Cores based System on Chip Platform for Telecommunication Applications: VOIP

Open Cores based System on Chip Platform for Telecommunicati...

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2007 International Conference on Design & Technology of Integrated Systems in Nanoscale Era (DTIS'07)

作者： S. Titri N. Izeboudjen L. Sahli D. Lazib F. Louiz Division de Microélectronique Centre de Dévelopment des Technologies Avancées Algiers Algeria

In this paper, we present a platform for system on chip (SoC) implementation that is suitable for telecommunication applications. To build the platform, we have adopted the OpenCores-Openhardware design concept. The benefit of using the OpenCores methodology is flexibility, reuse and accessibility of the cores at free cost. We demonstrate how the open hardware trend can help designers to build complex integrated circuits such as SoCs at low cost. To test the platform, our first application is a SoC implementation of a Voice Over IP (VoIP) Gateway. The first preliminary results show that the whole SoC can be implemented in the field programmable gate array (FPGA) -^sXC2V1000 circuit.

关键词： System-on-a-chip Internet telephony Hardware Design methodology Costs Field programmable gate arrays Partitioning algorithms software algorithms Circuit testing Computer architecture

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Diagnosising faults by supervised and unsupervised learning

Diagnosising faults by supervised and unsupervised learning

引用

European Control Conference (ECC)

作者： L. Kovács G. Z. Terstyánszky Miskolci Egyetem Miskolc HU

Neural networks provide a solution to overcome drawbacks of the quantitative fault diagnosis because first, they are capable to model off-line the behaviour of linear and non-linear systems. Secondly, they can also learn on-line the behaviour of a system requiring no priori knowledge about the system. The neural networks are particularly good for fault diagnosis of systems that have imperfect models and/or incomplete data. There are two basic learning methods of neural networks that are applied to fault diagnosis: supervised and unsupervised learning methods. To solve problem of priori unknown faults, unsupervised learning is used. The Counterpropagation network was selected to diagnose faults as result of analysis of supervised and unsupervised learning methods applied to neural networks.

关键词： Fault diagnosis Neural networks Unsupervised learning Training software algorithms Vehicles Supervised learning

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AE-Sim: simulating intelligent robots in intelligent environments

AE-Sim: simulating intelligent robots in intelligent environ...

引用

IEEE International Symposium on Intelligent Control (ISIC)

作者： A. Raggi A. Sgorbissa R. Zaccaria DIST University of Genova Italy

Research in autonomous robotics relies on simulators for two main reasons: simulators provide support for the fast prototyping of software algorithm, and they often are a "surrogate" in multi-robot systems when it is not feasible to build a whole robot team to carry out research on coordinated/cooperative behaviours. This paper describes AE-Sim, a simulator which we developed to emulate the main features of our "artificial ecosystem" approach, in which robots are thought of as mobile units within an intelligent environment where they coexist and co-operate with plenty of fixed, intelligent devices that are assigned different roles: helping the robot to localize itself, controlling automated doors and elevators, detecting emergency situations, etc

关键词： Intelligent robots Robot kinematics Mobile robots Robotics and automation Artificial intelligence software prototyping Virtual prototyping software algorithms Multirobot systems Ecosystems

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