检索结果-内蒙古大学图书馆

作者： Dong, Yu Chen Liu, Yan Luo, Jun Yong Zhang, Jin State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9783038351399

This article uses the vector space model to express microblogging text in quantity, via the cosine of the angle of text clustering method to calculate the similarity between the text. We can generate alternative microblogging hot cluster by centralized method, by adding the microblogging impact Factor into vector text mold of alternative hotspot clusters. In order to simulate the exclusive advantage of star in the information dissemination process of the real world, we use the alternative hotspot clusters which already weighted the microblogging impact factor to reevaluate its characteristics of vector, to optimize the hot microblogging discovery algorithm and to make the sorting results more in line with the law of information dissemination, finally to give some suggestions and opinions on hot microblogging evaluation method. © (2014) Trans Tech Publications, Switzerland.

关键词： Information dissemination

来源：评论

学校读者我要写书评

暂无评论

The process analysis of encryption and decryption based on process dependency graphs

The process analysis of encryption and decryption based on p...

引用

2013 International Conference on Sport Science and Computer Science, CCCS 2013

作者： Chang, Rui Jiang, Liehui He, Hongqi Zeng, Yun State Key Laboratory of Mathematic Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9781845649166

At present, the research on reverse analysis of encrypting and decrypting process pays more attention to cryptographic algorithms recognition. There is no mature theory or tools for the entire process analysis of encryption and decryption. In order to solve the problem efficiently, this paper discusses encryption and decryption process dependency graphs, summarizes the existing research results about the cryptographic algorithms recognition technology, and explores a way to research the process analysis of encryption and decryption based on process dependency graphs. Finally, the result on an example reveals the entire process analysis of encryption and decryption. © 2014 WIT Press.

关键词： Graphic methods

来源：评论

学校读者我要写书评

暂无评论

Software library functions implementation of a customized High-Level Synthesis environment

Software library functions implementation of a customized Hi...

引用

2013 2nd International Conference on Frontiers of Energy and Environment engineering, ICFEEE 2013

作者： Dang, Lin-Yu Pang, Jian-Min Yu, Jin-Tao Yang, Jin State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9781138000513

Compared with traditional Hardware Design Languages (HDL) programming, High-Level Synthesis (HLS) can reduce the design difficulty of reconfigurable system. Most HLS tools target for systems on programmable chips, and do not support loosely coupled reconfigurable computers. This paper presents a method for using HLS results in some loosely coupled systems with Ethernet as means of communication. Software processes run on general purpose processors instead of embedded CPUs, and there are only hardware processes on the FPGAs. Software and hardware processes communicate over Ethernet with a self-designed reliable protocol. This paper mainly discusses the software part of this method. Finally, we present some primary experiment results on the PRCA (Proactive Reconfigurable computing Architecture) prototype platform created by our research group. The results indicate that the method is feasible. © 2014 Taylor & Francis Group, London.

关键词： General purpose computers

来源：评论

学校读者我要写书评

暂无评论

Leveraging markov chain and optimal mutation strategy for smart fuzzing

Leveraging markov chain and optimal mutation strategy for sm...

引用

2014 International Conference on Information and Network Security, ICINS 2014

作者： Ouyang, Yongji Wu, Zehui Mu, Qing Wang, Qingxian State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9781849199094

Fuzz testing is an important way of vulnerability discovery, however, the existing fuzzers based on symbolic execution and others have inherent shortcomings like needing more computing resource, in-depth analysis and so on. To solve above problems, this paper presents a smart fuzzing method based on Markov chain. Firstly, this method optimizes the testing input sample to get the minimal sample set. Secondly, this method records program execution information by using instrument, and makes a Markov model about state. Finally, this method uses Markov chain to detect the change of execution path, and leads tester to choose better samples to mutate. Meanwhile, we analyse mutation strategies in depth for better triggering exception. Experimental data shows that the presented method can help fuzzer to generate effective test samples. We discovers 51 vulnerabilities in software like WPS, along with the code coverage increases of nearly 49% comparing with zzuf and the average exception discovery rate increase nearly 9 times comparing with MiniFuzz.

关键词： Markov processes

来源：评论

学校读者我要写书评

暂无评论

On the Cycle Structure of Some Nonlinear Feedback Shift Registers

引用

Chinese Journal of Electronics 2014年第4期23卷 801-804页

作者： WANG Zhongxiao XU Hong QI Wenfeng State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou Information Science and Technology Institute Department of Computer Science and Engineering Shanghai Jiao Tong University

In this paper, we partly determine the cycle structure of two types of Nonlinear feedback shift registers(NFSRs). Based on these results, the cycle structure of a class of NFSRs with symmetric feedback functions can be completely characterized. Furthermore, an alternative proof of Kjeldsen’s results is presented. Compared with the original proof based on abstract algebra theory, ours is straightforward and easy to understand.

关键词： Cryptography Stream ciphers Nonlinear feedback shift registers Symmetric functions

来源：评论

学校读者我要写书评

暂无评论

Tomography is Necessary for Universal Entanglement Detection with Single-Copy Observables

引用

Physical Review Letters 2016年第23期116卷 230501-230501页

作者： Dawei Lu Tao Xin Nengkun Yu Zhengfeng Ji Jianxin Chen Guilu Long Jonathan Baugh Xinhua Peng Bei Zeng Raymond Laflamme Institute for Quantum Computing University of Waterloo Waterloo N2L 3G1 Ontario Canada State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing 100084 China Centre for Quantum Computation and Intelligent Systems Faculty of Engineering and Information Technology University of Technology Sydney NSW 2007 Australia Department of Mathematics and Statistics University of Guelph Guelph Ontario N1G 2W1 Canada State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences Beijing 100190 China Joint Center for Quantum Information and Computer Science University of Maryland College Park Maryland 20742 USA Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of China Hefei Anhui 230036 China Canadian Institute for Advanced Research Toronto Ontario M5G 1Z8 Canada Perimeter Institute for Theoretical Physics Waterloo Ontario N2L 2Y5 Canada

Entanglement, one of the central mysteries of quantum mechanics, plays an essential role in numerous tasks of quantum information science. A natural question of both theoretical and experimental importance is whether universal entanglement detection can be accomplished without full state tomography. In this Letter, we prove a no-go theorem that rules out this possibility for nonadaptive schemes that employ single-copy measurements only. We also examine a previously implemented experiment [H. Park et al., Phys. Rev. Lett. 105, 230404 (2010)], which claimed to detect entanglement of two-qubit states via adaptive single-copy measurements without full state tomography. In contrast, our simulation and experiment both support the opposite conclusion that the protocol, indeed, leads to full state tomography, which supplements our no-go theorem. These results reveal a fundamental limit of single-copy measurements in entanglement detection and provide a general framework of the detection of other interesting properties of quantum states, such as the positivity of partial transpose and the k-symmetric extendibility.

关键词： Entanglement detection Entanglement measures Quantum tomography Nuclear magnetic resonance

来源：评论

学校读者我要写书评

暂无评论

Corrections to “Cross-Modal Correlation Learning by Adaptive Hierarchical Semantic Aggregation” [Jun 16 1201-1216]

引用

IEEE Transactions on Multimedia 2016年第10期18卷 2127-2127页

作者： Yan Hua Shuhui Wang Siyuan Liu Anni Cai Qingming Huang School of Information Engineering Communication University of China Beijing China Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences Beijing China Smeal College of Business Pennsylvania State University University Park PA USA Center of Cloud Computing Institute of Advanced Computing and Digital Engineering Shenzhen Institutes of Advanced Technology Shenzhen China Department of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China University of Chinese Academy of Sciences Beijing China Key Laboratory of Intellectual Information Processing Institute of Computing Technology Chinese Academy of Sciences Beijing China

Presents corrections to the paper, "Cross-modal correlation learning by adaptive hierarchical semantic aggregation," (Hua, Y., et al) IEEE Trans. Multimedia, vol. 18, no. 6, pp. 1201-1216, Jun. 2016.

关键词： Semantics Learning (artificial intelligence) Ontologies Query processing

来源：评论

学校读者我要写书评

暂无评论

Research on general permutation encryption module based on chaos theory 5

Research on general permutation encryption module based on c...

引用

2014 5th International Conference on Information Technology for Manufacturing Systems, ITMS 2014

作者： Sun, Wen Jie State Key Laboratory of Mathematical Engineering and Advanced Computing ZhengzhouHenan China

ISBN: (纸本)9783038353263

Replacement and substitution encryption are two basic types of encryption historically. The classical encryption algorithm has been compromised now, but they still can play special role for modern cryptology. For example, in digital image encryption system, substitution can disrupt the original order of the images and eliminate the correlation of image information which not only can realize security of images, but also can resist intentional attack and destruction of clipping and noise. And transposition transformation is introduced into the design of block ciphers. The substitution has the feature of high efficiency and resistance, which makes it meet the specific requirements of encryption. So substitution cypher can be applied to modern encryption system. © (2014) Trans Tech Publications, Switzerland.

关键词： Cryptography

来源：评论

学校读者我要写书评

暂无评论

DEAM: Decoupled, Expressive, Area-Efficient Metadata Cache

引用

Journal of Computer Science & Technology 2014年第4期29卷 679-691页

作者：刘鹏方磊黄巍 CCF IEEE Department of Information Science and Electronic Engineering Zhejiang University State Key Laboratory of Mathematical Engineering and Advanced Computing ACM Department of Electrical and Computer Engineering University of Rochester NY 14627-0231 U.S.A.

Chip multiprocessor presents brand new opportunities for holistic on-chip data and coherence management solutions. An intelligent protocol should be adaptive to the fine-grain accessing behavior. And in terms of storage of metadata, the size of conventional directory grows as the square of the number of processors, making it very expensive in large-scale systems. In this paper, we propose a metadata cache framework to achieve three goals： 1） reducing the latency of data access and coherence activities, 2） saving the storage of metadata, and 3） providing support for other optimization techniques. The metm：lata is implemented with compact structures and tracks the dynamically changing access pattern. The pattern information is used to guide the delegation and replication of decoupled data and metadata to allow fast access. We also use our metadata cache as a building block to enhance stream prefetching. Using detailed execution-driven simulation, we demonstrate that our protocol achieves an average speedup of 1.12X compared with a shared cache protocol with 1/5 of the storage of metadata.

关键词： cache directory multiprocessor

来源：评论

学校读者我要写书评

暂无评论

Characterizing Multi-media Retrieval Applications

Characterizing Multi-media Retrieval Applications

引用

International Conference on Parallel Processing (ICPP)

作者： Yunping Lu Xin Wang Weihua Zhang Yi Li Wenyun Zhao Shanghai Key Laboratory of Data Science Fudan University Shanghai China State Key Lab of Mathematical Engineering and Advanced Computing Wuxi China Software School Fudan University Shanghai China Parallel Processing Institute Fudan University Shanghai China

Multimedia data, especially image and video data, have become one of the most overwhelming data types on the Internet recently. Considering the user experience and real application requirements, multimedia data always demand a real-time processing speed. As a result, the huge amount of such data make retrieving useful information from them not only data-intensive, but also computation-intensive, which poses significant challenges to current system and architecture designs. Unfortunately, most prior studies focus only on text based retrieval systems or traditional multimedia processing applications. As far as we know, there is no systematic study on analyzing the characteristics of multimedia retrieval applications and how they might impact system and architecture designs. In this paper, we make the first attempt to construct a multimedia retrieval benchmark suite (called MMR Bench) to evaluate the corresponding system and architecture designs. To embody diverse multimedia retrieval applications, we collect eight state-of-the-art multimedia retrieval algorithms which cover the whole retrieval stages, including feature extraction, feature matching, and spatial verification. To satisfy diverse evaluation purposes, we implement multiple versions for each algorithm, including sequential version, pthread version for multi-core evaluation and data-parallel (i.e., Map-reduce) version for data-center evaluation. Moreover, MMR Bench provides flexible interfaces through retrieval stages, as well as a tool to adjust parameters and regenerating different scales of reasonable input. With such a flexible design, the algorithms in MMR Bench may be not only suitable for individual kernel-level evaluation, but also capable to be integrated into a complete infrastructure for system-level evaluation. Based on MMR Bench, we further analyze the inherent architectural characteristics, such as input size sensitivity and workload balance, which provides some insights into system and archite

关键词： Multimedia communication Feature extraction Benchmark testing Streaming media Algorithm design and analysis Computer architecture

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：