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A multidimensional approach of evaluating developers 2020

A multidimensional approach of evaluating developers

引用

2nd International Conference on Big Data Engineering, BDE 2020

作者： Zhang, Changqiang Chen, Ming Key Laboratory of Parallel and Distributed Computing College of Computer National University of Defense Technology China

ISBN: (纸本)9781450377225

In this paper, we propose an approach to assess the ability of developers based on their behavior data from OSS. Specifically, we classify developers' ability into code ability, project management ability, and social ability. Code efficiency is related to the developer's commit record and the pull-request record. The developer's project management ability is achieved by tracking the developer's commit record. We use regular matching to map the commit behavior to the project management behavior and calculate the developer's project management ability according to the proportion of different behaviors. The social ability of developers is related to the data that developers interact with in the open-source community. We dug for developer reviews on commit, issue, and gist fragments. By calculating the proportion of positive emotions in developer reviews and the proportion of developers interacting with others in the reviews, the social ability of developers is obtained. We get behavioral data from 50 random developers. Twitter's data is used to test the effect of different machine learning algorithms on the accuracy of developer comment polarity judgments. It is found that the combination of SVM, xgboost and random forest have the highest prediction accuracy. Finally, we select 5 students to use Likert scale to score the results. Our score shows that the results are basically in line with expectations. © 2020 ACM.

关键词： Decision trees

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U-shaped Dual Attention Transformer: An Efficient Transformer Based on Channel and Spatial Attention 4

U-shaped Dual Attention Transformer: An Efficient Transforme...

引用

4th International Conference on Artificial Intelligence, Robotics, and Communication, ICAIRC 2024

作者： Zhai, Zhaoyuan Qiao, Peng Li, Rongchun Zhou, Zhen National University of Defense Technology National Key Laboratory of Parallel and Distributed Computing Changsha China

ISBN: (纸本)9798331531225

Transformer-based methods have demonstrated remarkable performance on image super-resolution tasks. Due to high computational complexity, researchers have been working to achieve a balance between computation costs and performance. Restormer has achieved commendable balance by utilizing global channel attention. However, the performance is limited by insufficient local pixel reconstruction. In this paper, we propose a U-shaped Dual Attention Transformer (UDAT) with local-global receptive field, addressing the limitation of Restormer in local pixel reconstruction. We propose a dense window channel attention to enhance the local feature representation, more efficient in computational complexity. Experiments demonstrate that our UDAT achieve superior performance compared with Restormer on benchmark datasets, surpassing Restormer by 0.57 dB on the Urban100 dataset. On-par with SwinIR, our method reduces computational complexity by 3.2 times and improves inference speed by 2 times, achieving a better balance between computational costs and performance. © 2024 IEEE.

关键词： Pixels

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The PCP/PFP programming models on the BBN TC2000 1st

The PCP/PFP programming models on the BBN TC2000

引用

1st International ACPC Conference on parallel Computation, 1991

作者： Brooks, Eugene D. Gorda, Brent C. Warren, Karen H. Massively Parallel Computing Initiative Lawrence Livermore National Laboratory LivermoreCA94550 United States

ISBN: (纸本)9783540554370

We describe the PCP/PFP programming models which we are using on the BBN TC2000. The parallel programming models are implemented in a portable manner and will be useful on the scalable shared memory machines we expect to see in the future. We then describe the TC20machine architecture which is a scalable general purpose parallel architecture capable of efficiently supporting both shared memory and message passing programming paradigms. We also briefly describe a PCP implementation of the Gauss elimination algorithm which exploits the large local memories on the TC2000. © 1992, Springer Verlag. All rights reserved.

关键词： parallel architectures

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Advances in the parallelization of music and audio applications

Advances in the parallelization of music and audio applicati...

引用

International Computer Music Conference, ICMC 2010

作者： Battenberg, Eric Freed, Adrian Wessel, David Center for New Music and Audio Technologies Parallel Computing Laboratory University of California Berkeley United States

ISBN: (纸本)0971319286

Multi-core processors are now common but musical and audio applications that take advantage of multiple cores are rare. The most popular music software programming environments are sequential in character and provide only a modicum of support for the efficiencies to be gained from parallelization. We provide a brief summary of existing facilities in the most popular languages and provide examples of parallel implementations of some key algorithms in computer music such as partitioned convolution and non-negative matrix factorization NMF. We follow with a brief description of the SEJITS approach to providing support between the productivity layer languages used by musicians and related domain experts and efficient parallel implementations. We also consider the importance of I/O in computer architectures for music and audio application. We lament the fact that current GPU architectures as delivered in desk and laptop processors are not properly harnessed for low-latency real-time audio applications.

关键词： Non-negative matrix factorization

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parallel Accelerating Ultra-Long Read Alignment by Vertical Partitioning Data 13

Parallel Accelerating Ultra-Long Read Alignment by Vertical ...

引用

13th IEEE International Symposium on parallel Architectures, Algorithms and Programming, PAAP 2022

作者： Pan, Deng Zhong, Cheng Chen, Danyang Zhang, Jinxiong Yang, Feng Guangxi University Key Laboratory of Parallel Distributed Computing Technology Guangxi Universities School of Computer Electronics and Information Guangxi Nanning China Guangxi University Key Laboratory of Parallel Distributed Computing School of Computer Electronics and Information Guangxi Nanning China

ISBN: (纸本)9781665452182

The alignment between sequencing reads and genome is a basic work in biological big data analysis. Each read of the third generation sequencing data is getting longer, and the data size is getting larger. To effectively solve the ultra-long read alignment problem with high requirements for computing and memory capacity, a strategy for vertical partitioning ultra-long reads on hybrid CPU/GPU cluster is proposed, and a heap data structure is used to filter the local aligned results in all computing nodes of the parallel cluster system according to the alignment score to reduce the data transmission size. The methods for early termination and parallel merging-splicing are used to accelerate splicing local aligned results. The local aligned results among all computing nodes are collected and extended to obtain the final alignment results. The experimental results on datasets of simulated and real ultra-long reads show that the proposed parallel alignment algorithm can obtain high alignment accuracy, sensitivity and base-level sensitivity as a whole, and accelerate completing alignment between ultra-long reads and reference genome. © 2022 IEEE.

关键词： Alignment

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Optimization of HPF programs with dynamic recompilation technique

Optimization of HPF programs with dynamic recompilation tech...

引用

4th International Symposium on High Performance computing, ISHPC 2002

作者： Araki, Takuya Murai, Hitoshi Kamachi, Tsunehiko Seo, Yoshiki Parallel and Distributed Systems NEC Laboratory Real World Computing Partnership United States

ISBN: (纸本)354043674X

Optimizing compilers perform various optimizations in order to exploit the best performance from computer systems. However, some kinds of optimizations cannot be applied if values of variables or system parameters are not known at compilation time. To solve this problem, we designed and implemented a system which collects such information at run time, and dynamically recompiles part of the program based on it. In our system, recompilation and management of runtime information are carried out on processors other than those which execute user programs. Therefore, recompilation cost does not affect the program execution time, unlike other similar systems. The evaluation result shows that quite high speedup can be attained with this method. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Information management

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Providing dynamic and customizable caching policies 2

Providing dynamic and customizable caching policies

引用

2nd USENIX Symposium on Internet Technologies and Systems, USITS 1999

作者： Barnes, J. Fritz Pandey, Raju Parallel and Distributed Computing Laboratory Computer Science Department University of California DavisCA95616 United States

Web caching has emerged as one solution for improving client latency on the web. Cache effectiveness depends on the policies used to route requests to other caches and servers, to maintain up-to-date web objects and to remove objects from the cache. Traditional caches apply one set of policies, which determines the efficiency as well as the effectiveness of the caches. This set of policies often does not exploit the diversity inherent in different web objects, caches and clients. Policies that do exploit this diversity result in convoluted caching policies that attempt to combine multiple policies and guess at the unknown characteristics of web objects, caches and clients. In this paper, we present an extensible caching infrastructure in which cache administrators, servers, and end users can customize how web objects are cached, replaced, and kept consistent. The infrastructure includes a domain-specific language, CacheL, for defining customizable caching policies that can be changed dynamically. Analysis of our prototype, PoliSquid, shows the benefits of the infrastructure for variable coherency policies, localized removal policies, and early removal of objects from servers. © 1999 by The USENIX Association All Rights Reserved.

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A novel data broadcast strategy for traffic information query in the VANETs

A novel data broadcast strategy for traffic information quer...

引用

14th International Conference on Web-Age Information Management, WAIM 2013

作者： Wang, Xinjing Guo, Longjiang Li, Jinbao Ren, Meirui School of Computer Science and Technology Heilongjiang University China Key Laboratory of Database and Parallel Computing Heilongjiang China

ISBN: (纸本)9783642385612

This paper proposes a data broadcast strategy for traffic information query. Traffic information query is an important application in VANETs. Real-time traffic information query makes users to select path in a short time. By this data broadcast strategy, traffic information query can be quick and accurate after data is broadcast and forwarded. According to the restricted condition in the strategy, the vehicles broadcast their packets, and update, combine-forward or drop the data after receiving them in VANETs. In this way, more vehicles can receive data from source region. This algorithm can reduce the redundant data and control the communication congestion effectively. This paper adopts NS2 and SUMO as simulation platform. Simulation results show that, data collision rate is no more than 30%, and information area coverage rate reaches more than 80% with the strategy proposed in this paper after setting proper parameters. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Vehicular ad hoc networks

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A Multi-Objective Artificial Physics Optimization Algorithm Based on Two-Phase Search 8

A Multi-Objective Artificial Physics Optimization Algorithm ...

引用

8th International Symposium on Computer Science and Intelligent Control, ISCSIC 2024

作者： Zhang, Huihua Xie, Liping Taiyuan University of Science and Technology Shanxi Key Laboratory of Big Data Analysis and Parallel Computing Taiyuan China

ISBN: (纸本)9798350380286

Aiming at the problems of insufficient utilization of information about elite particles in archive and instability of particle motion in the population in the multi-objective artificial physics optimization algorithm (MOAPO) in solving multiobjective optimization problems, A multi-objective artificial physics optimization algorithm based on two-phase search (TPMOAPO) is proposed. To begin with, the algorithm improves the calculation of the mass of particles, so that the strength and weakness of the particles can be accurately transformed into the corresponding masses while improving the efficiency of particle mass calculation. Next, a two-phase search strategy is proposed, which makes the algorithm have strong exploration ability in the first phase, and the second phase gradually enhances the exploitation capability with iterations, which solves the problem of instability motion of particles in the search process. Finally, the simulated binary crossover (SBX) and polynomial-based mutation (PM) operators are adopted in the archive to further enhance the search capability of the algorithm. For verifying the performance of TP-MOAPO, 21 benchmark functions were selected to compare with the classical multi-objective particle swarm optimization algorithms: MOPSO, dMOPSO, SMPSO, MMOPSO, and NMPSO, and the experimental results show the superiority of TP-MOAPO in these functions. © 2024 IEEE.

关键词： Optimization algorithms

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Runtime support for type-safe dynamic Java classes 14th

引用

14th European Conference on Object-Oriented Programming, ECOOP 2000

作者： Malabarba, Scott Pandey, Raju Gragg, Jeff Barr, Earl Barnes, J. Fritz Parallel and Distributed Computing Laboratory Computer Science Department University of California DavisCA95616 United States

ISBN: (纸本)3540676600

Modern software must evolve in response to changing condi- tions. In the most widely used programming environments, code is static and cannot change at runtime. This poses problems for applications that have limited down-time. More support is needed for dynamic evolution. In this paper we present an approach for supporting dynamic evolution of Java programs. In this approach, Java programs can evolve by changing their components, namely classes, during their execution. Changes in a class lead to changes in its instances, thereby allowing evolution of both code and state. The approach promotes compatibility with existing Java applications, and maintains the security and type safety controls imposed by Java's dynamic linking mechanism. Experimental analyses of our implementation indicate that the implementation imposes a moderate performance penalty relative to the unmodified virtual machine. © Springer-Verlag Berlin Heidelberg 2000.

关键词： Java programming language

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