检索结果-内蒙古大学图书馆

2016 IEEE 7th International Conference on Software Engineering and Service science

作者： Yun Zhan Gang Yin Tao Wang Cheng Yang Zhixing Li Huaimin Wang National Laboratory for Parallel and Distributed Processing National University of Defense Technology

The global open source software resources have become an Internet-scale repository,which provide abundant resources for software ***,how to locate the desired resource efficiently and accurately from such large amounts is quite a challenge *** of recent works barely focus on the semantic similarity by analyzing the software itself,which often result in inappropriate *** this paper,we propose Dolphin,a global OSS search engine,which leverage the crowd discussions around OSS across communities for optimizing software *** employs the crowd wisdom as an important factor and combines it with the semantic similarity to optimize search results *** implement an OSS search engine based on the proposed approach,which provides online service *** experiments and user studies suggest the effectiveness of our approach.

关键词： Software retrieval ranking community influence

来源：评论

学校读者我要写书评

暂无评论

A validation of SonarQube issues related to real bugs based on open source software

A validation of SonarQube issues related to real bugs based ...

引用

2016联合国际信息技术、机械与电子工程国际会议

作者： Xiang Hou Yao Lu Yiang Gan Mengwen Chen Tao Wang Gang Yin National Laboratory for Parallel and Distributed Processing National University of Defense Technology

ISBN: (纸本)9781510830028

High reliability is an essential factor of modern software. At the same time, as software complexity is increasing day by day, bug counts and rate inevitably rises, leading to undermine software reliability. To avoid this problem, programmers always use issue-finding tools(bug detection) to discover the defects from source code in development of software. Recently, software inspection has been shown to be an effective way to speed up the process of source code verification and to move a portion of discovered defects from test to coding phase. As we know, modern software is often developed over many years. During this time, the commit metadata is becoming an important source of social characteristics. In this paper, our aim is to devise an empirical method to assess the percentage and the types of the issues found by issue finding tools are actual defects of the software.

关键词： Bug Detection Source Control System SonarQube Java Git

来源：评论

学校读者我要写书评

暂无评论

Social Computing in Open Source Community:A Study of Software Reuse

Social Computing in Open Source Community:A Study of Softwar...

引用

The Second International Conference of Young Computer Scientists, Engineers and Educators,ICYCSEE 2016

作者： Mengwen Chen Tao Wang Cheng Yang Qiang Fan Gang Yin Huaimin Wang National Laboratory for Parallel and Distributed Processing National University of Defense Technology

Software projects are not developed in isolation but often build upon other open source resources. These projects form a kind of reference ecosystem regarded as a software world. Most of social computing works focus on social networks such as Facebook and weibo to mine information. However, few previous works analyze Open Source Community which could help developers conduct collaborative development. In this paper, we model the Java reference ecosystem as a network based on the reuse relationships of Git Hub-hosted Java projects and analyze the characteristics and the patterns of this reference ecosystem by using community detection and pattern discovery algorithms. Our study indicates that(1) Developers prefer to reuse software limited in only a small part of projects with cross cutting functionality or advanced applications.(2)Developers usually select software reused with similar function widely depending on different requirements, resulting to different patterns. Based on these collective intelligence, our study opens up several possible future directions of reuse recommendation, which are considered as guidance of collaborative development.

关键词： Social computing Open source software Reuse relationship Characteristic and pattern

来源：评论

学校读者我要写书评

暂无评论

Performance of the fixed-point autoencoder

引用

Tehnicki Vjesnik 2016年第1期23卷 77-82页

作者： Jiang, Jingfei Hu, Rongdong Wang, Dongsheng Xu, Jinwei Dou, Yong Science and Technology on Parallel and Distributed Processing Laboratory National University of Defense Technology 109 DeYa Road ChangShaHunan410073 China

The model of autoencoder is one of the most typical deep learning models that have been mainly used in unsupervised feature learning for many applications like recognition, identification and mining. Autoencoder algorithms are compute-intensive tasks. Building large scale autoencoder model can satisfy the analysis requirement of huge volume data. But the training time sometimes becomes unbearable, which naturally leads to investigate some hardware acceleration platforms like FPGA. The software versions of autoencoder often use single-precision or double-precision expressions. But the floating point units are very expensive to implement on FPGA. Fixed-point arithmetic is often used when implementing autoencoder on hardware. But the accuracy loss is often ignored and its implications for accuracy have not been studied in previous works. There are only some works focused on accelerators using some fixed bit-widths on other neural networks models. Our work gives a comprehensive evaluation to demonstrate the fix-point precision implications on the autoencoder, achieving best performance and area efficiency. The method of data format conversion, the matrix blocking methods and the complex functions approximation are the main factors considered according to the situation of hardware implementation. The simulation method of the data conversion, the matrix blocking with different parallelism and a simple PLA approximation method were evaluated in this paper. The results showed that the fixed-point bit-width did have effect on the performance of autoencoder. Multiple factors may have crossed effect. Each factor would have two-sided impacts for discarding the "abundant" information and the "useful" information at the same time. The representation domain must be carefully selected according to the computation parallelism. The result also showed that using fixed-point arithmetic can guarantee the precision of the autoencoder algorithm and get acceptable convergence speed. © 2016

关键词： Field programmable gate arrays (FPGA)

来源：评论

学校读者我要写书评

暂无评论

Fast garment simulation with aid of hybrid bones

引用

Journal of Central South University 2015年第6期22卷 2218-2226页

作者：吴博陈寅徐凯程志全熊岳山 College of Computer National University of Defense Technology Science and Technology on Parallel and Distributed Processing Laboratory (National University of Defense Technology) Avatar Science Company

A data-driven method was proposed to realistically animate garments on human poses in reduced space. Firstly, a gradient based method was extended to generate motion sequences and garments were simulated on the sequences as our training data. Based on the examples, the proposed method can fast output realistic garments on new poses. Our framework can be mainly divided into offline phase and online phase. During the offline phase, based on linear blend skinning(LBS), rigid bones and flex bones were estimated for human bodies and garments, respectively. Then, rigid bone weight maps on garment vertices were learned from examples. In the online phase, new human poses were treated as input to estimate rigid bone transformations. Then, both rigid bones and flex bones were used to drive garments to fit the new poses. Finally, a novel formulation was also proposed to efficiently deal with garment-body penetration. Experiments manifest that our method is fast and accurate. The intersection artifacts are fast removed and final garment results are quite realistic.

关键词： data-driven linear blend skinning hybrid bones interactive

来源：评论

学校读者我要写书评

暂无评论

A radiation hardening algorithm on 2nd order CDR 20th

A radiation hardening algorithm on 2nd order CDR

引用

20th Annual Conference on Computer Engineering and technology, NCCET 2016

作者： Chunmei, Hu Shuming, Chen Yao, Liu Jianjun, Chen Jingyan, Xu School of Computer National University of Defense Technology Deya Street 109 Changsha410073 China National Laboratory for Parallel and Distributed Processing National University of Defense Technology Deya Street 109 Changsha410073 China

ISBN: (纸本)9789811031588

A radiation hardening algorithm named as state-conservation on 2nd order clock and data recovery (CDR) system is presented in this paper. This proposed algorithm is used to resist the single event transient (SET) of CDR tracking loop. A MATLAB model is established to fast evaluate the sensitive position of the system. A circuit model of 5 Gbps half rate CDR together with the hardening algorithm is set up to verify the effect of the proposed algorithm in Cadence design environment. The simulation result shows that SET does not lead to any error data and no loop delay is added. Compared to the RHBD standard-cell technique, the hardening algorithm saves area about 15.3% and reduces power consumption about 47.8%. © Springer Nature Singapore Pte Ltd. 2016.

关键词： Radiation hardening

来源：评论

学校读者我要写书评

暂无评论

Efficient semantic-aware coflow scheduling for data-parallel jobs

Efficient semantic-aware coflow scheduling for data-parallel...

引用

IEEE International Conference on Cluster Computing

作者： Ziyang Li Yiming Zhang Yunxiang Zhao Dongsheng Li National Key Laboratory for Parallel and Distributed Processing National University of Defense Technology

ISBN: (纸本)9781509036547

This paper studies the communication pattern of data-parallel applications from the perspective of job execution, and discovers multiple inter-coflow dependencies. These inter-coflow dependencies, collectively named as semantic flow (seflow), can expose job-level semantics. It is observed that most distributed computing frameworks describe their job execution as directed acyclic graphs (DAG). So a seflow comprises not only all the coflows of a job but also the DAG-based relationship between them. Seflow, coflow and flow can be viewed as the top-down abstractions for communication of jobs.

关键词： Semantics distributed computing Sparks Scheduling algorithms Scheduling Schedules

来源：评论

学校读者我要写书评

暂无评论

Adaptive simulations of viscous and inviscid detonations in supersonic combustible mixture 52nd

Adaptive simulations of viscous and inviscid detonations in ...

引用

52nd AIAA/SAE/ASEE Joint Propulsion Conference, 2016

作者： Cai, Xiaodong Liang, Jianhan Deiterding, Ralf Che, Yonggang Science and Technology on Scramjet Laboratory National University of Defense Technology ChangshaHunan410073 China Aerodynamics and Flight Mechanics Research Group University of Southampton Highfield Campus SouthamptonSO17 1BJ United Kingdom Science and Technology on Parallel and Distributed Processing Laboratory National University of Defense Technology ChangshaHunan410073 China

ISBN: (纸本)9781624104060

Two-dimensional high-resolution inviscid and viscous detonations were conducted in the supersonic combustible mixture with the open-source program AMROC. The results show that as the grid resolution increases, more small-scale vortices along the slip lines are generated in the inviscid detonation compared with the viscous one. The physical viscosity plays a major role in the whole diffusion effect, indicating that with the increasing of the grid resolution the viscous detonation can become convergent more easily. The diffusion effect brought by the physical viscosity can enhance the mixing of the unburned mixture with the combusted product, hence accelerating the consumption of the unburned reactant and the chemical heat release, and thus finally generating a stronger detonation than the inviscid one. The transverse wave of the viscous detonation can propagate faster, resulting in a lower periodic of the triple point oscillation than that of the inviscid one, mainly owing to the faster heat release resulting from the stronger diffusion effect. It is suggested that the strong diffusion effect involved in the viscous detonation can make a more significant impact on the suppression of the instability in the detonation front, thus eventually generating less triple points than the inviscid one, even with a larger overdrive degree. © 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Detonation

来源：评论

学校读者我要写书评

暂无评论

A Soft Multi-core Architecture for THP of MIMO-OFDM Systems

A Soft Multi-core Architecture for THP of MIMO-OFDM Systems

引用

International Conference on Network and Information Systems for Computers (ICNISC)

作者： Lirui Chen Yang Zhang Cang Liu Zuocheng Xing National Laboratory for Parallel and Distributed Processing National University of Defense Technology Changsha China

ISBN: (纸本)9781467388399

MIMO system is widely studied for its high performance in wireless communication, of which the THP algorithm is a bottleneck of performance. Generally the THP is implemented in ASIC for high performance, which unfortunately makes it a difficulty for system updating. Compared to the ASIC solution, configurable processing, as its inherent flexibility and extension, becomes a promising solution for this difficulty, especially in the case of FPGA based systems where multi-core method is utilized to make up for the performance deficiency of soft cores. This paper explores a micro blaze based-multi-core system to increase the performance of THP algorithm while keeping the system flexibility. In support of the flexibility to update the algorithm, the effective adaption of this approach is demonstrated. Moreover, optimized application specific hardware is combined with data-level paralleled software modules in the multi-core embedded system, which increases the performance of THP algorithm to a 6× speed over all-soft single-core solution.

关键词： Program processors Algorithm design and analysis MIMO Hardware Matrix decomposition Field programmable gate arrays Computer architecture

来源：评论

学校读者我要写书评

暂无评论

Comparative Studies of Sampling for Analytics on Massive Data

Comparative Studies of Sampling for Analytics on Massive Dat...

引用

International Conference on Systems and Informatics

作者： Xuan Zhang Dongsheng Li National Laboratory for Parallel and Distributed Processing National University of Defense Technology Changsha China

ISBN: (纸本)9781509055227

Groupwise analytics on big data have been widely used in statistics, computer science, parallel computing and many other fields in recent years. At The same time, Aggregation queries is one of the most important analytics techniques. In big data eras, the aggregation queries on the ever-increasing data volumes will consumes much time, the traditional methods of traversing the entire dataset is not acceptable to users. Data sampling is a technique that only process a part of data to get an approximate result, the technique can save a lot of time when dealing with a vast amount of data with the sacrifice of accuracy. This paper will introduce several data sampling algorithms for approximate aggregation queries for big data, and analyze the shortcomings and advantages of each methods. Including the technique apply to the sparse data which meaning data has a limited population but a wide range.

关键词： Groupwise analytics Aggregation Approximate result Data sampling Sparse data

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：