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检索条件"任意字段=Proceedings of the 9th International Conference on Predictive Models in Software Engineering"

共 2520 条记录，以下是2101-2110 订阅

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Using Stakeholder Analysis for Improving Statechart Merging in software Requirement Management

Using Stakeholder Analysis for Improving Statechart Merging ...

引用

the 9th international conference for Young Computer Scientists(第九届国际青年计算机大会)

作者： Jun Cheng Qiang Liu School of Software Tsinghua University Beijing China

View-based requirement elicitation provides an e_ective way to collect information from di_erent stakeholders, who may emphasize distinct aspects of a system. In this paper, we introduce the idea of stakeholder analysis into viewpoint-based requirement analysis and propose a framework for merging state model viewpoints. We give a formal template in which each stakeholder can rank their expected behaviors of the model according to their preference. Our merge operator is behavior preserving and has strong robustness in merging inconsistent requirement. Besides, the operator provides mechanisms to calculate the behaviors' importance based on stakeholder preference and stakeholder confidence level. A common refinement of the original models tries to maximally meet all stakeholders' requirements, and the proposed methodology provides good references for making decisions when conflicting behaviors appear between models. It is shown that viewpoints merging in this framework is e_cient and reasonable.

关键词： Requirement engineering viewpoint framework statechart merging stakeholder preference

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Prediction of a Heat-exchanger's Dynamic Performance Based on BP NN

Prediction of a Heat-exchanger's Dynamic Performance Based o...

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9th international conference on Signal Processing(第九届国际信号处理学术会议)(ICSP'08)

作者： Shoujun Zhou Youen Zhao Maocheng Tian Jihong Pan Ming Gao School of Energy & Power Engineering Shandong UniversityJinan250014China School of Thermal Energy School of Computer Science and Technology Shandong Economic UniversityJinan 250014China School of Energy & Power Engineering Shandong UniversityJinan250014China

To accurately predict the dynamic performance of a heat exchanger,this paper first analyzed its basic operating characteristics,then built the predicting model with the help of the neural network (NN),finally put forward a back propagation (BP) predicting algorithm and programmed *** comparison between the real output of the heat exchanger and the predicting output of the program shows that the predicting method for the heat exchanger based on BP NN can predict the heat exchanger's dynamic performance effectively,and proves that the NN technology is an effective way in the predicting of the heat exchanger's dynamic performance.

关键词： Neural networks Water heating Temperature control Artificial neural networks Neurons Heat engines Performance analysis predictive models Multi-layer neural network Delay effects

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Simplified Video Coding for Digital Mobile Devices

Simplified Video Coding for Digital Mobile Devices

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9th international conference on Signal Processing(第九届国际信号处理学术会议)(ICSP'08)

作者： Jarmo Takala Moncef Gabbouj Jin Li Hexin Chen Department of Information Technology Tampere University of TechnologyTampereFinland Department of Communication Engineering Jilin UniversityChangchunChina

Most mobile devices are currently suffering from the lack of computational power and energy-consumption constraints,there is significant interest and research in reducing the computational complexity for fast video *** paper proposes a statistical model to predict the zero-quantized DCT (ZQDCT) coefficients for 3-D DCT video coding and thus to speech up the encoding ***,each 8×8×8 pixel cube at the input of DCT is decomposed into a mean value and a residual 8×8×8 pixel ***,a statistical Laplacian model is mathematically developed to predict the ZQDCT ***,the redundant calculations for these ZQDCT coefficients are *** to the baseline encoding method,the proposed model can significantly simplify the complexity and achieve better real-time performance at the expense of negligible visual *** reduction also implies longer battery lifetime and energy economy for portable devices.

关键词： Video coding Discrete cosine transforms predictive models Encoding Mobile computing Computational complexity Speech processing Speech coding Laplace equations Mathematical model

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Trust Path-Searching Algorithm Based on PSO

Trust Path-Searching Algorithm Based on PSO

引用

the 9th international conference for Young Computer Scientists(第九届国际青年计算机大会)

作者： Zhiwen Zeng Ya Gao Zhigang Chen Xiaoheng Deng School of Information Science and Engineering Central South University Changsha 410083 China

As there are many malicious nodes spreading false information in P2P networks, it is of great importance to build a sound mechanism of trust in the P2P enviroments. To avoid the shortage of the existing trust model, this paper provides a Trust Path- Searching Algorithm based on PSO. In this algorithm, after initializing the particle swarm, each particle can update its speed and location according to its information, and then produce a new particle with better value. Doing that process continuously, implementing the global search of the space, finally, we can get a better overall value, which is the better trust path in the networks. the simulation results show that it can get the overall optimum solution in a relatively short time after many times of iteration, and the more times it iterates, the better the trust path is. It can be proved that to a certain extent, the algorithm can prevent the fraud.

关键词： Peer to peer computing Particle swarm optimization Network servers Computer networks software algorithms Information science Acoustical engineering Analytical models Algorithm design and analysis Scalability

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A Novel Method for the Inversion of the Virtual Well-log Interval Transit Time

A Novel Method for the Inversion of the Virtual Well-log Int...

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9th international conference on Signal Processing(第九届国际信号处理学术会议)(ICSP'08)

作者： Hai Ma Yanjiang Wang College of Information and Control Engineering China University of PetroleumDongyingShandong 257061P.R.China

By analyzing the relation between well-log data and seismic data,a novel method for predicting the virtual well-log interval transit time based on particle swarm optimization and support vector machine (PSO-SVM) is proposed.A prediction model for the virtual well-log interval transit time is established using the data of seismic of the un-drilled well,seismic and well-log of the drilled well by training the SVM,which is optimized by PSO *** proposed method is applied to the well YONG of Junggar Basin and the experimental results show it has higher prediction accuracy ,faster convergence speed and better generalization than BP neural network *** the geological characteristic parameters mainly depends on the seismic and the well-log information[1,2] at *** the un-drilled well,it is difficult to predict various of geological parameters as only the seismic layer velocity is *** the seismic and well-log data are both the comprehensive response of the same geologic body and have the strong correlation,the mapping relation between them of the drilled well can be used to reconstruct the virtual well-log interval transit time of the un-drilled *** the traditional method such as the regression method can't solve the nonlinear mapping problem well,a novel method for the inversion of virtual well-log interval transit time is proposed using the data of seismic of the un-drilled well,seismic and well-log of the drilled well by the PSO-SVM algorithm.

关键词： Support vector machines Particle swarm optimization Geology Educational institutions Control engineering Petroleum Information analysis predictive models Accuracy Neural networks

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New modeling approaches using detailed kinetics for advanced engines

New modeling approaches using detailed kinetics for advanced...

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7th international conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008

作者： Meeks, E. Ando, H. Chou, C.-P. Dean, A.M. Hodgson, D. Koshi, M. Lengyel, I. Maas, U. Naik, C.V. Puduppakkam, K.V. Reitz, R. Wang, C. Westbrook, C.K. Reaction Design 6440 Lusk Boulevard San Diego CA 92121 United States University of Fukui Bunkyo 3-9-1 910-8507 Fukui City Japan Colorado School of Mines 1500 Illinois St. Golden CO 80401 United States University of Tokyo 7-3-1 Hongo Bunkyo-Ku Tokyo 113 Japan Dow Chemical Co. 2301 N Brazosport Blvd B-1226 Freeport TX 77541 United States Universität Karlsruhe Kaiserstraße 12 D-76131 Karlsruhe Germany University of Wisconsin 1500 Engineering Dr. Madison WI 53706 United States

Ignition timing and control, as well as predictability of engine emissions, are critical factors in advanced-engine system design. the use of detailed chemical kinetics is key to simulating ignition performance and to predicting emissions. this paper describes a collaborative and systematic effort that is underway to enable computationally efficient use of accurate kinetics in engine simulation. the collaboration is focused on building a database of chemical information and on developing a complementary set of software tools that provide efficient engine-simulation capabilities. the goal is predictive simulations that capture the detailed behavior of complex fuels, such as gasoline and diesel, under homogeneous charge compression ignition (HCCI) and related operating conditions. Since directly accounting for all of the hundreds of constituent molecules in a fuel during simulation of real-fuel combustion is intractable, we employ a model-fuel or surrogate-fuel approach instead. Mixtures of model-fuel molecules can be determined to adequately represent important real-fuel properties and engine-combustion characteristics. In this work, model fuel compositions are determined by matching a mixture behavior to that of the real fuel, focusing on distillation-curve characteristics, net-heating value, hydrogen-to-carbon ratio, and octane/cetane numbers. this surrogate-definition process requires detailed chemical-kinetics mechanisms for a variety of model-fuel compounds. To build such a database of model-fuel component mechanisms, we have used a combination of automatic mechanism-generation and manual mechanism-development approaches. these methods adhere to a systematic set of class-based rules in determining elementary reaction rates, as well as thermodynamic and transport properties of species. In addition, a comprehensive validation study of the mechanisms, using a wide variety of both fundamental and engine experiments, has allowed refinement of these rules and improvem

关键词： Kinetics

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Design of the Lifting Mechanism with Virtual Prototyping Technology

Design of The Lifting Mechanism with Virtual Prototyping Tec...

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the 9th international conference on Computer-Aided Industrial Design & Conceptual Design(CAID&CD'2008)(2008年国际计算机辅助工业设计与概念设计学术会议)

作者： Bin Shu Changsheng Xu Dingfang Cheng Key Lab of Port Cargo Handing Technology of Communications School of Logistics Engineering of Wuhan University of Technology P. R China

In the traditional design process, the design method of port machines mainly adopts the static design and has no effective dynamic technique. the technique of virtual prototype can factually simulate all kinds of running states of each mechanism under various working conditions which vary from different loads and in all kinds of processes. the results of the emulation are used for estimating and judging the data of actual movement. It also offers certain value for reference for the dynamic analysis and the calculation of port machinery, and provides technical support for the creative design and the optimization of crane, and plays an important part in expediting the development cycle and reducing the cost. ADAMS is a famous virtual prototyping modeling and analysis software. this paper introduces the application of the virtual prototyping technology based on ADAMS software which is used in the research process of the lifting mechanism of the gantry crane. the related dynamics models were established and the dynamics loads were conformed under different working conditions according to crane dynamics theories. Interrelated data, which is got in the simulation analyses, offers effective methods on dynamic design of integrated system of the lifting mechanism. It will shorten the design period of the gantry crane and will improve the efficiency and the quality of the design. the virtual prototype study on integrating system of the lifting mechanism leads to an efficient tool and a method for designing gantry crane which is economic, credible, stable and high-powered. this design method will be extensively applied in mechanism design.

关键词： ADAMS Virtual prototyping Modeling Lifting mechanism

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Target controlled infusion for Kids: Trials and simulations

Target controlled infusion for Kids: Trials and simulations

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Annual international conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Disha Mehta Jon McCormack Parry Fung Guy Dumont J. Mark Ansermino Department of Anesthesiology Pharmacology & Therapeutics University of British Columbia Vancouver BC Canada Department of Electrical and Computer Engineering University of British Columbia Vancouver BC Canada

Target controlled infusion (TCI) for Kids is a computer controlled system designed to administer propofol for general anesthesia. A controller establishes infusion rates required to achieve a specified concentration at the drug's effect site (C e ) by implementing a continuously updated pharmacokinetic-pharmacodymanic model. this manuscript provides an overview of the system's design, preclinical tests, and a clinical pilot study. In pre-clinical tests, predicted infusion rates for 20 simulated procedures displayed complete convergent validity between two software implementations, Labview and Matlab, at computational intervals of 5, 10, and 15s, but diverged with 20s intervals due to system rounding errors. the volume of drug delivered by the TCI system also displayed convergent validity with Tivatrainer, a widely used TCI simulation software. Further tests, were conducted for 50 random procedures to evaluate discrepancies between volumes reported and those actually delivered by the system. Accuracies were within clinically acceptable ranges and normally distributed with a mean of 0.08 ± 0.01 ml. In the clinical study, propofol pharmacokinetics were simulated for 30 surgical procedures involving children aged 3 months to 9 years. Predicted C e values during standard clinical practice, the accuracy of wake-up times predicted by the system, and potential correlations between patient wake-up times, C e , and state entropy (SE) were assessed. Neither C e nor SE was a reliable predictor of wake-up time in children, but the small sample size of this study does not fully accommodate the noted variation in children's response to propofol. A C e value of 1.9 μg/ml was found to best predict emergence from anesthesia in children.

关键词： Drugs Anesthesia Mathematical model software Computational modeling predictive models Manuals

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Simulation and experiment research on human riding comfort for vehicle vibration in dynamic environment

Simulation and experiment research on human riding comfort f...

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international conference on Computer-Aided Industrial Design and Conceptual Design, CAIDCD

作者： Ji Zhihong E. Zhang Liu Zhonghua Jia Jing Zhang Fan School of Mechanical Engineering Xi'an Jiaotong University Xi'an China Department of Computing University of Surrey Guildford U.K.

According to the needs of simulation research of human riding comfort for vehicle vibration in dynamic environment, the mathematical model of random road is established using white noise. the model has been subsequently introduced into Matlab/Simulink to simulate several different incentive forms of random road, and the time-domain model of random road excitation-according with Chinese Highway Standard is developed. Moreover, vehicle dynamics model is set up in dynamics analysis software ADAMS, and human biological structure model-coincident with Chinese body characteristics is done alike in ADAMS/LifeMOD. these two models are assembled to construct a biomechanical simulation model of human-vehicle system. Aimed to get vertical vibration response of vehicle and human at different speeds and different road levels, the biomechanical simulation model of human-vehicle system is imitatively analyzed by introduction of random road excitation model. Furthermore, an evaluation study on human riding comfort for vehicle vibration in dynamic environment is presented on the basis of national standard GB/T4970. the objective evaluation test on human vibration comfort is carried out on random vibration platform SA30-S802/ST, the experimental results showed that the results of the objective evaluation test basically tally with the simulation results. the research above provides an important method for the design and analysis of vehicle man-machine interface in dynamic environment and has important technical significance for rapid evaluation of human driving comfort.

关键词： Humans Vehicle dynamics Biological system modeling Mathematical model Road vehicles Testing White noise Time domain analysis Road transportation Standards development

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Research and Design of an Executable Modeling Language Based on MOF

Research and Design of an Executable Modeling Language Based...

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2008 IEEE 9th international conference on Computer-Aided Industrial Design & Conceptual Design

作者： Jinhong Zhao~1 Shufen Liu~2 Xianyan Wang~2 Liang Chen~2 Chuyi Wei~2 1 College of Computer Science and Technology,Jilin University,Changchun,China College of Computer Science and Technology,Jilin University,Changchun,China

the ultimate aim of software development is to produce executable code,which is the most core of the model application at the same *** various models which are built by kinds of modeling technologies can not be *** all of these attribute to non-execution of modeling language itself. this paper studies the function of MOF in the modeling language field and behavior abstract model of OCL, and on this foundation I design a sort of modeling language named XKL that described by *** rationale of its design of structure metamodel comes from the basic structure of EMOF,at the same time the design of its behavior metamodel comes from the expression abstract syntax model of *** this way, not only XKL conforms to the MOF standard in the modeling structure,but also embodies the ability of the OCL language in the aspect of describing model *** the models which are built by the XKL- based modeling tool are executable.

关键词： Meta Object Facility Object Constraint Language Metamodel Model Execution.

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