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检索条件"机构=Research Center of Massive Language Information Processing and Cloud Computing Application"

共 48 条记录，以下是31-40 订阅

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Erasure Correcting Code to Optimize Partial Stripe Write in Raid-6

Erasure Correcting Code to Optimize Partial Stripe Write in ...

引用

2nd International Conference on Communication Technology(ICCT 2015)

作者： Ghulam Muhammad Shaikh Jiaqing Qu Quanxin Zhang Yu-an Tan Beijing Engineering Research Center of Massive Language Information Processing and Cloud Computing Application School of Computer Science and Technology Beijing Institute of Technology Shanghai Radio Equipment Research Institute

In Large Scale database system storage system, Raid 6 is to be used to tolerate failure disks and provide high reliability with the support of different codes. In large system there is no any risk of data loss or disk failure but in case of disaster or suddenly something happened with the risk of data failure Raid can be tolerate more than three disk failure. In this paper we optimize the partial stripe write with the erasure correcting code. Moreover, some erasure correcting can be evaluate or optimize on different codes in Raid, here we focus on partial stripe write where data can be written on disk either fully or partially.

关键词： RAID Erasure Correcting Code Partial Stripe Write Algorithm of partial stripe

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How to protect query and report privacy without sacrificing service quality in participatory sensing

How to protect query and report privacy without sacrificing ...

引用

IEEE International Conference on Performance, computing and Communications (IPCCC)

作者： Meng Li Fan Wu Guihai Chen Liehuang Zhu Zijian Zhang Beijing Engineering Research Center of Massive Language Information Processing and Cloud Computing Application Beijing Institute of Technology China Department of Computer Science and Engineering Shanghai Jiao Tong University China

The ubiquity of mobile devices has brought forth the concept of participatory sensing, whereby people can collect and share data from ambient environment for the benefit of themselves or community. To encourage participation of all stakeholders and guarantee system functionality, a privacy-preserving participatory sensing system should be established to hide querier's and participant's sensitive information(e.g., interest, location and content). Meanwhile, it is also imperative for server to provide an accurate and quick service(match the “need” with “supply” and retrieve the desired result from collected data set) for queriers when queries and reports are encrypted to protect privacy. In this paper, we propose Query and Report privacy-preserving protocol(QueRe) in participatory sensing system aiming to protect the query privacy and report privacy without sacrificing the service quality. Security analysis and performance simulation show our method achieves superior performance in privacy protection and service quality. To the best of our knowledge, our work is first attempt for protecting query privacy and report privacy while considering server's service quality.

关键词： Privacy Servers Sensors Data privacy Cryptography Protocols Measurement

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Efficient Searchable Symmetric Encryption for Storing Multiple Source Data on cloud

Efficient Searchable Symmetric Encryption for Storing Multip...

引用

IEEE International Conference on Trust, Security and Privacy in computing and Communications (TrustCom)

作者： Chang Liu Liehuang Zhu Jinjun Chen Beijing Engineering Research Center of Massive Language Information Processing and Cloud Computing Application School of Computer Science and Technology Beijing Institute of Technology Beijing China Faculty of Engineering and Information Technology University of Technology Sydney NSW Australia

ISBN: (纸本)9781467379533

cloud computing has greatly facilitated large-scale data outsourcing due to its cost efficiency, scalability and many other advantages. Subsequent privacy risks force data owners to encrypt sensitive data, hence making the outsourced data no longer searchable. Searchable Symmetric Encryption (SSE) is an advanced cryptographic primitive addressing the above issue, which maintains efficient keyword search over encrypted data without disclosing much information to the storage provider. Existing SSE schemes implicitly assume that original user data is centralized, so that a searchable index can be built at once. Nevertheless, especially in cloud computing applications, user-side data centralization is not reasonable, e.g. an enterprise distributes its data in several data centers. In this paper, we propose the notion of Multi-Data-Source SSE (MDS-SSE), which allows each data source to build a local index individually and enables the storage provider to merge all local indexes into a global index afterwards. We propose a novel MDS-SSE scheme, in which an adversary only learns the number of data sources, the number of entire data files, the access pattern and the search pattern, but not any other distribution information such as how data files or search results are distributed over data sources. We offer rigorous security proof of our scheme, and report experimental results to demonstrate the efficiency of our scheme.

关键词： Indexes cloud computing Servers Encryption Distributed databases

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A Parallel Cross-language Retrieval System for Patent Documents

A Parallel Cross-Language Retrieval System for Patent Docume...

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2015 6th IEEE International Conference on Software Engineering and Service Science(ICSESS 2015)

作者： Xin Shen Heyan Huang Lingzhi Li Yonggang Huang Beijing Engineering Research Center of High Volume Language Information Processing & Cloud Computing Application Beijing Institute of Technology Overhaul Branch Beijing Electric Power Company

In order to help people obtain useful information from patent documents in different languages. This paper proposes a cross-language retrieval system to search Chinese and English patent documents simultaneously. This system consists of query translation module, document retrieval module and user interaction module. Query translation module is used to translate query based on bilingual dictionaries. Document retrieval module consists of monolingual retrieval system using standard vector space model. In order to retrieve in highly parallel, we use the Map Reduce model to calculate the similarity. User interaction module provides users with interactive mechanism used to improve the retrieval accuracy in the system. It contains two parts: the second translation and relevance feedback. The experimental results show that our system has good performance.

关键词： Patent document cross-language information retrieval parallel retrieval Hadoop

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A parallel cross-language retrieval system for patent documents

A parallel cross-language retrieval system for patent docume...

引用

IEEE International Conference on Software Engineering and Service Sciences (ICSESS)

ISBN: (纸本)9781479983544

In order to help people obtain useful information from patent documents in different languages. This paper proposes a cross-language retrieval system to search Chinese and English patent documents simultaneously. This system consists of query translation module, document retrieval module and user interaction module. Query translation module is used to translate query based on bilingual dictionaries. Document retrieval module consists of monolingual retrieval system using standard vector space model. In order to retrieve in highly parallel, we use the MapReduce model to calculate the similarity. User interaction module provides users with interactive mechanism used to improve the retrieval accuracy in the system. It contains two parts: the second translation and relevance feedback. The experimental results show that our system has good performance.

关键词： Patents Dictionaries Context Data processing Accuracy Machine learning algorithms

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QACtools: A Quality Assessment and Quality Control Tool for Next-Generation Sequencing Data

QACtools: A Quality Assessment and Quality Control Tool for ...

引用

2015年中国智能自动化学术会议

作者： Dandan Song Ning Li Lejian Liao Beijing Lab of Intelligent Information Technology School of Computer Science and Technology Beijing Engineering Research Center of High Volume Language Information Processing and Cloud Computing Applications Beijing Institute of Technology

In recent years, next-generation sequencing technologies have been widely used, and are rapidly changing the landscape of genetics with unimaginable speed. However, the preliminary quality control regulations including trimming adaptor sequences, quality statistics, and depth and coverage statistics need to be applied to raw reads before further analysis. QACtools implements various utilities for processing raw reads in the FASTQ format and alignments in the BAM *** analyzes some relevant properties of next-generation sequencing data such as average read length, base quality scores, and so on. Additionally, to our knowledge,none of the other tools support depth and coverage statistic that have been provided in our tool for analysis of large DNA sequencing data. It is crucial for overcoming errors in base calling and assembly. We suppose tool is useful for the quality control of NGS data to perform further analysis. This software is an open source application freely available at https://***/projects/qactools/.

关键词： NGS data analysis Quality control FASTQ format BAM format

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SSD lifespan-oriented cache optimization in SSD/HDD hybrid storage system

SSD lifespan-oriented cache optimization in SSD/HDD hybrid s...

引用

2014 International Conference on Environmental Engineering and Computer application (ICEECA 2014)

作者： X.Wang Q.X.Zhang Y.A.Tan J.Q.Qu Beijing Engineering Research Center of Massive Language Information Processing and Cloud Computing Application School of Computer Science and Technology Beijing Institute of Technology Shanghai Radio Equipment Research Institute

Layered SSD/HDD hybrid storage system has been widely used. However, most traditional designs are performance oriented, and not optimized for SSD lifespan. In this paper, SSD lifespan oriented layered model and cache algorithm are proposed. To decrease SSD wear rate, HDD-RAM switch tunnel is appended to the traditional layered hybrid structure. Cache window size is considered in cache algorithm to filter data, avoiding unnecessary cache cost. Results show optimized designs significantly reduced erase times on SSD, and slightly influenced original performance.

关键词： SSD lifespan-oriented cache optimization in SSD/HDD hybrid storage system HDD RAM cache

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Elastic and Efficient Virtual Network Provisioning for cloud-Based Multi-tier applications

Elastic and Efficient Virtual Network Provisioning for Cloud...

引用

International Conference on Parallel processing (ICPP)

作者： Meng Shen Ke Xu Fan Li Kun Yang Liehuang Zhu Lei Guan Beijing Engineering Research Center of High Volume Language Information Processing and Cloud Computing Applications Beijing Institute of Technology P. R. China Department of Computer Science Tsinghua University P. R. China School of Computer Science & Electronic Engineering University of Essex UK The ISN National Key Lab XiDian University P. R. China School of Management & Economics Beijing Institute of Technology P. R. China

ISBN: (纸本)9781467375887

The multi-tier architecture is prevalently adopted by cloud applications, such as the three-tier web application. It is highly desirable for both tenants and providers to provide virtual networks in an efficient and elastic way, where tenant applications can automatically scale in or out with varying workloads and providers can accommodate as many requests as possible in the underlying network. However, due to potential conflicts between efficiency and elasticity, it is challenging to achieve these two goals simultaneously in abstracting tenant requirements and designing corresponding provisioning algorithms. In this paper, we propose an efficient and elastic virtual network provisioning solution called Easy Alloc, which is comprised of an elasticity-aware abstraction model and a virtual network provisioning algorithm. To accurately capture the tenant requirement and maintain the provisioning simplicity for providers, the elasticity-aware model enables two types of decoupling, i.e., Always-on VMs for normal load and on-demand VMs for dynamic scaling, and the bandwidth requirement of each VM for intra- and inter-tier communications. Then we formulate the virtual network provisioning as an overhead minimization problem, where the objective simultaneously considers the bandwidth and elasticity overhead. Due to the NP-completeness of this problem, we leverage two heuristics, slot reservation and tier iteration, to obtain an efficient algorithm. Extensive simulation results show that compared with a typical elasticity-agnostic method under a heavy load, Easy Alloc enables a 9% increase of request acceptance rate and a 16.8% improvement of the successful extension rate. To the best of our knowledge, this is the first work targeting at the elastic virtual network provisioning.

关键词： Bandwidth Elasticity cloud computing Algorithm design and analysis Load modeling Resource management

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A novel audio information hiding scheme based on rMAC

A novel audio information hiding scheme based on rMAC

引用

2012 International Conference on information Technology and Software Engineering, ITSE 2012

作者： Yu, Litao Zhu, Liehuang Liu, Dan Xie, Yuzhou Beijing Eng. Res. Center of Massive Language Information Processing and Cloud Computing Application School of Computer Science and Technology Beijing Institute of Technology Beijing 100086 China

ISBN: (纸本)9783642345302

We present a novel audio information hiding scheme based on robust message authentication code (rMAC). By combining coefficient quantization based information hiding scheme with rMAC and chaotic encryption, proposed scheme can ensure the content integrity and the confidentiality of the embedded audio as well as secret communication. Experimental results show that our scheme provides highly robust authentication against content preserving degradations. When 30 % noise added into the transporting message, 92.50 % audio communication can also succeed. © 2013 Springer-Verlag.

关键词： Authentication

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The adaptive multicast data origin authentication protocol

The adaptive multicast data origin authentication protocol

引用

2nd CCF Internet Conference of China, ICoC 2013

作者： Zhu, Liehuang Yang, Hao Yang, Zhenghe Beijing Eng. Research Center of Massive Language Info. Processing and Cloud Computing Application School of Computer Science and Technology Beijing Institute of Technology Beijing China

ISBN: (纸本)9783642539589

Most multicast data origin authentication schemes work under the fixed parameters without taking the problem of changeable network environment into account. However, the network conditions will obviously influence the efficiency of a protocol such as the time delay and the overhead. So adjusting the parameters adaptively to achieve the ideal state with the dynamic network is necessary. To achieve a high authentication rate and adapt to the changeable and unstable network environment, we proposed a multicast data origin authentication protocol which is adaptive depending on the packet error rates as well as the time delay, and is robust against the packet loss and injection. Our model can estimate a more appropriate packet error rate and make the time delay lower according to the feedback values got from the receivers using the Markov chain so that it can be adaptive. This strategy is especially efficient in terms of not only the adaptation of dynamic network but also the shortcut of overhead and delay. © Springer-Verlag Berlin Heidelberg 2013.

关键词： Time delay

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