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检索条件"任意字段=4th International Conference on Art, Science, and Engineering of Programming, Programming 2020"

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A Special Net Structure and Its Application in Workflow Modeling

A Special Net Structure and Its Application in Workflow Mode...

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2011 4th IEEE international conference on Computer science and Information Technology(ICCSIT 2011)

作者： Xinqin Gao,Yan Li,Mingshun Yang,Yong Liu and Erbao Xu School of Mechanical and Precision Instrument engineering Xi'an University of Technology 5 South Jinhua Road,Xi'an 710048,Shaanxi,P.R.China

On the basis of the traditional net structure,a new concept of special net structure(SNS)was proposed and its main characteristics were ***,this special net structure was a concolorous graph with colorless nodes and concolorous edges,and also was a special polychromatic graph,which can be described by polychromatic sets theory *** the same time,the SNS was stored by utilizing Hashtable in computer programming in order to reduce the storage space and diminish the search *** special net structure was applied to workflow modeling,and the basic model primitives,typical model constructs and typical conflict constructs were *** verification algorithm of workflow special net structure model was *** with an example of service process,a prototype system of workflow modeling based on the special net structure was developed to illustrate the correctness and feasibility of the proposed approach.

关键词： special net structure polychromatic sets workflow modeling verification algorithm

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End-to-End Neural Network for Shadow Detection using Combined Color Spaces

End-to-End Neural Network for Shadow Detection using Combine...

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international conference on ent Computing and Control Systems (ICICCS)

作者： Shailender Kumar Dhruv Ramdev Himanshu Aggarwal Himanshu Choudhary Department of Computer Science and Engineering Delhi Technological University Delhi India

ISBN: (数字)9781728148762

ISBN: (纸本)9781728148779

O ver the years, many techniques for shadow detection have been proposed. Howe ver, most of them are computationally expensive and cannot be used in further applications. In this research, a new technique for shadow detection is presented, which is computationally efficient and can be used for further computer vision tasks. Our method uses images converted into different color spaces as input to a framework based on deep learning to detect shadow features from single images in an end to end manner. Our framework observes given image completely to learn and preserve the shadow features in various global and local contexts simultaneously. Our proposed method is trained and assessed on shadow detection benchmark dataset (SBU Shadow Dataset) and performs better than the state-of-the-art convolutional methods for shadow detection as it improves shadow error rate (SER) by 9% while also pointing out some irregularities in the dataset.

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Joint Consolidated Middleboxes and Virtual Switch Deployment and Routing for Load Balancing in Software-Defined Network

Joint Consolidated Middleboxes and Virtual Switch Deployment...

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IEEE international conference on Cloud Computing and Big Data Analysis (ICCCBDA)

作者： Juncheng Ge Gongming Zhao Xuwei Yang School of Software Engineering School of Computer Science and Technology University of Science and Technology of China Hefei China

ISBN: (数字)9781728160245

ISBN: (纸本)9781728160252

Network Function Virtualization (NFV) is a rapidly developing network architecture concept, in which virtualization technologies transform network functions in hardware devices to software middleboxes. For reasons such as improving security and performance, flows in the network need to traverse specific service function chains (SFCs). Due to the rapid increases in traffic volume, traffic variety, and service requirements, it becomes much complex for SFC routing. the existing solutions for joint middlebox placement and routing still consume a lot of forwarding rules and result in overloaded controllers, which decrease the scalability of middlebox networks. To solve these problems, this paper proposes a joint deployment scheme, which uses the consolidated middlebox to simplify the processing of SFC and uses the virtual switch (e.g., OVS) to reduce TCAM usage. Specifically, We formulate the joint optimization of consolidated middleboxes and the virtual switch placement, as well as routing (JPR) problem into an integer linear programming model, and prove its NP-hardness. An efficient algorithm is proposed to solve the JPR problem. Extensive simulation results show that the proposed solution can achieve better load balancing while using fewer forwarding rules than other existing algorithms. For example, our algorithm can reduce the maximum flow entries by 69%, and reduce the maximum link load by 45% compared with the state-of-the-art approaches.

关键词： Switches Middleboxes Routing Bandwidth Hardware Virtualization

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Based on Travel Time Analysis of Location Layout for Dwell Point Strategy

Based on Travel Time Analysis of Location Layout for Dwell P...

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Computer science and Blockchain (CCSB), international conference on

作者： Guodong Hou Jianguo Li School of Automation and Electrical Engineering Lanzhou Jiaotong University Gansu Lanzhou China

ISBN: (数字)9798350356502

ISBN: (纸本)9798350356519

As an important control strategy of planar mobile stereo garage, standby parking strategy affects garage operation efficiency. For plane three-dimensional garage mobile conveyors, location and travel time analysis, conveyors, the current task run the shortest time mathematical model is established, under the nearby parking space allocation principle, from two angles of customers and operators, with average customer waiting time and conveyors, average service time, the average utilization of garage efficiency indicators, the simulation results show that: For a garage with three I/O ports and three porters at both ends, the average service time of porters under the two standby position strategies is optimal when the ratio of floors to columns in the garage is about 1/2 in the process of non-homogeneous Poisson flow customer arrival. When the customer arrival rate is 20VEh /h and the average utilization rate of garage porter is lower than 50%, the garage with larger column layout has the best operation efficiency. When the customer arrival rate is 60VEh/h and the average utilization rate of garage porter reaches 90%, the garage with the ratio of layer to column is about 1/2 in the garage has the best operation efficiency. the results show that the garage operation efficiency will be influenced by the different location layout under the different customer arrival rate, and the customer arrival situation should be fully understood at the beginning of the garage design, so as to provide reference for the more reasonable stereo garage design.

关键词： Computer science Processor scheduling Simulation Layout Linear programming Mathematical models Space exploration Blockchains Resource management Floors

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Design of Signal Processing System for Pipeline Pig Tracking and Positioning Receiver Based on Orthogonal Digital Lock-in Amplification Principle

Design of Signal Processing System for Pipeline Pig Tracking...

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Electronic Information engineering and Computer Technology (EIECT), international conference on

作者： Xitong Zhang Haotian Shi Yuanchen Zhu Tao Zhang Department of Electrical Engineering and Electronics University of Liverpool Liverpool United Kingdom School of Manufacturing Science and Engineering Sichuan University Chengdu China

ISBN: (数字)9798331528850

ISBN: (纸本)9798331528867

the current signal processing system of pipeline pig tracking and positioning receiver based on bandpass filter is difficult to ensure high reliability and sensitivity when receiving weak signals from transmitters in complex environments due to limitations of Q value. Meanwhile, the frequency characteristics and overall sensitivity of the signal processing stages within the system are fixed and not adjustable, limiting the system's ability to adapt to different operating modes under varying environmental conditions. this paper presents a signal processing system based on orthogonal digital lock-in amplification principle. the system employs operational amplifier AD821 with low-noise for preamplification, specialized filter chips LTC10696 and LTC1068200 with adjustable frequency characteristics for low-pass filtering and band-pass filtering, then STM32F103RBT6 microcontroller is utilized to perform the A/D conversion and orthogonal digital lockin amplification (DLIA) processing. the system can reliably receive the 23 Hz sinusoidal signal from the transmitter with ultrahigh sensitivity, and its frequency characteristic and receiving sensitivity can be flexibly adjusted through programming. Experiment shows that the system can meet the diversified demands for detection sensitivity under different environmental conditions, with effective receiving sensitivity (up to 40 m in the highest sensitivity setting) much higher than current systems (less than 20 m).

关键词： Band-pass filters Sensitivity Transmitters Filtering Pipelines Low-pass filters Receivers Signal processing Frequency conversion Reliability engineering

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Compiler techniques for data partitioning of sequentially iterated parallel loops 90

Compiler techniques for data partitioning of sequentially it...

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Proceedings of the 4th international conference on Supercomputing

作者： David E. Hudak Santosh G. Abraham Department of Electrical Engineering and Computer Science The University of Michigan Ann Arbor Michigan

ISBN: (纸本)9780897913690

this paper uses bottom-up, static program partitioning to minimize the execution time of parallel programs by reducing interprocessor communication. Program partitioning is applied to a parallel programming construct known as a sequentially iterated parallel loop. this paper develops and evaluates compiler techniques to automatically generate data partitions for sequentially iterated parallel loops that minimize interprocessor communication. these techniques could be included as a communication-reducing back end for existing parallelizing compilers.A multiprocessor model is defined to analyze program execution factors that lead to interprocessor communication. A model for the sequentially iterated parallel loop is defined to quantify communication patterns within a program. A vector notation is chosen to quantify communication across a global data set. Communication parameters used in generating data partitions are found and used within equations which are shown to generate rectangular and hexagonal partition shapes that minimize interprocessor *** measuring the impact of communication on program performance and the improvements gained by using the automatically generated data partitions were conducted on a sixteen-processor Encore Multimax. the new method outperformed established data partitioning methods.

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Numerical simulation of lid driven flow based on finite volume method 23

Numerical simulation of lid driven flow based on finite volu...

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Proceedings of the 2023 4th international conference on Machine Learning and Computer Application

作者： Lishan Jia Qingyi Mo School of Aeronautical Engineering Civil Aviation University of China China

ISBN: (纸本)9798400709449

At present, the computing power of computers has been greatly improved, which has led to the rapid development of computational fluid dynamics (CFD) technology. Computational fluid dynamics technology is widely used in fluid research work, so CFD software has played a huge role in solving problems such as fluid flow and heat transfer, successfully applied in various fields of science and technology. In this paper, to understand the computational principle of the mainstream CFD software in the simulation of fluid, aiming at the two-dimensional steady-state convective diffusion problem, taking the classical lid driven flow in computational fluid mechanics as an example, the analysis includes the establishment of the fluid governing equation by the finite volume method on the staggered grid to discretize the governing equation. At the same time, by using the SIMPLE algorithm to solve the discrete control equation, the simulation of the lid driven flow field is realized by programming. the simulation results are in line with reality, and the accuracy and reliability of the algorithm are tested. It provides a reference for understanding the principle of fluid simulation by CFD software and developing more efficient and accurate digital simulation methods on this basis.

关键词： CFD Finite volume method Lid driven flow SIMPLE algorithm Staggered grid

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Nucleic Acid and Protein Sequence Alignment Methods and *** Progress and Next Generation Sequencing or Future Trends

Nucleic Acid and Protein Sequence Alignment Methods and *** ...

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2011 4th IEEE international conference on Computer science and Information Technology(ICCSIT 2011)

作者： Muhammad Ishaq Afridi College of Computer Science and Technology Harbin Engineering University Harbin Heilongjiang People Republic of China

Nucleic Acid,the DNA and RNA is a poly nucleotide chain consists of four different kinds of *** is a polypeptide chain of amino *** and correct sequencing of DNA and protein is an important and time consuming challenge in *** field of Bioinformatics revolves around analyzing and exploiting the information in DNA *** develop and use various heuristics methods and algorithms to get optimal DNA and protein *** of two sequences point by point or cell by cell to discover similarity and differences or common ancestry and functional *** of them give good results but they are still not *** predicts the structure and function of proteins,the relationship between proteins and gene interaction or *** review is focused on all kind of computer algorithms and techniques used for sequence alignment and *** gives us a clear picture of current progress and future trends in this field.I have to focus on the merits and optimization of each algorithm.

关键词： Sequence Alignment,Homology,Phylogeny,SAGA(Sequence Alignment by Genetic algorithm),Genetic Algorithm,Dynamic programming,Evolutionary algorithms,Dot Matrix method,Word based method,FASTA(Fast alignment),BLAST(Basic local alignment search tool),BLAT(BLAST like tool),PSI-BLAST(Position specific iterated BLAST),HMM(Hidden Markov Model),Bayesian Method,Substitution matrices,pairwise alignment,Messy Genetic Algorithm,MEGA (Molecular Evolutionary Genetics Analysis).

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Development of a Wavelet-Neural Network Based Visual Modeling Tool Towards Improving Efficiency of Interactive Runoff Forecasting

Development of a Wavelet-Neural Network Based Visual Modelin...

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2010 4th international conference on Intelligent Information Technology Application (IITA2010)

作者： Mutao Huang College of Hydropower & Information engineering Huzhong University of science & Technology Wuhan,China Yong Tian College of Hydropower & Information engineering line Huzhong University of science & Technology Wuhan,China

Accurate forecasting of river runoff poses great challenge on *** data-driven hydrological models have been developed to facilitate runoff forecasting due to their rapid development times and minimum information ***,there is a strong need for a user-friendly tool through which the user could construct simulation models graphically instead of writing simulation *** meet this challenge,a visual modeling tool that integrates visual modeling technology with a hybrid wavelet-neural network model has been developed with the goal of improving the modeling efficiency and enhancing the flexibility for interactive runoff *** the tool,the wavelet transform is used to decompose the time series of runoff,then the sub-signals are used as input to the ANN model to predict the runoff for certain time step *** on an open modeling interface,the tool enables to connect different models in a single environment with visual feedback and real-time interaction to support simulation of a complex system of river dynamics,thus isolating users from the complexity of underlying programming.A case study for interactive daily runoff forecasting is given for Shule River basin located in northwest of China.A serial simulation experiments were carried out to verify the feasibility of the tool,and the results show that the tool can greatly enhance the easy-to-use capabilities of river runoff modeling.

关键词： forecasting wavelet artificial nerual network visual modeling runoff forecasting time series

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Research on the Optimization Method of Capacity Configuration of DC Microgrid

Research on the Optimization Method of Capacity Configuratio...

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IEEE conference on Energy Internet and Energy System Integration (EI2)

作者： Li Zhang Huiwen Liu School of Electrical Engineering Dalian University of Technology Dalian China

ISBN: (数字)9781728196060

ISBN: (纸本)9781728196077

For the uncertainty brought by the connection of new energy to the grid, the research on the optimization of the capacity allocation of the DC microgrid becomes very important. the optimal configuration of DC micro-grid is the key to ensure the stable and economic operation of microgrid. this paper takes multi-layer optimization as the main idea to optimize the capacity configuration of the micro-grid. Firstly, the economic optimal solution of the system is obtained by enumeration method. With the lowest total cost of the project as the objective function, and the sensitivity analysis conditions of diesel price and new energy efficiency are taken as the sensitivity analysis conditions to obtain the economic optimal scheme and conduct preliminary analysis. Secondly, by taking the first-layer optimization results as the initial solution, particle swarm algorithm (PSO) is adopted to calculate and find the optimal scheme of system performance by taking economic conditions, new energy utilization rate as the constraint conditions, and the minimum sum of load power shortage rate and energy surplus rate as the objective function. the multiobjective problem is transformed into a single-objective problem by the weighted average method, and used to obtain the optimal solution. Finally, droop control method is introduced for the system to verify the stability of the system. this shows that the system can maintain power balance and provide correct guidance for stand-alone DC microgrid capacity design.

关键词： Economics Wind energy generation Sensitivity analysis Microgrids Linear programming Stability analysis Optimization

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