به نام خدا
Title: Green cloud computing schemes based on networks: a survey
Authors: N Xiong , W Han A Vandenberg
Abstract: The authors are particularly aware that green cloud computing (GCC) is a broad range and a hot ?eld. The distinction between ?consumer of? and ?provider of? cloud-based energy resources may very important in creating a world-wide ecosystem of GCC. A user simply submits its service request to the cloud service provider with the connection of Internet or wired/wireless networks. The result of the requested service is delivered back to the user in time, whereas the information storage and process, interoperating protocols, service composition, communications and distributed computing, are all smoothly interactive by the networks. In this study, this is a survey on GCC schemes based on networks. The concept and history of Green computing were introduced ?rst, and then focus on the challenge and requirement of cloud computing. Cloud computing needs to become green, which means provisioning cloud service while considering energy consumption under a set of energy consumption criteria and it is called GCC. Furthermore, the recent work done in GCC based on networks, including microprocessors, task scheduling algorithms, virtualisation technology, cooling systems, networks and disk storage were introduced. After that, the works on GCC from their research group was presented in Georgia State University. Finally, the conclusion and some future works were given.
Publish Year: 2012
Published in: IET Communications
Number of Pages: 7
موضوع: محاسبات ابری
ایران سای – مرجع مقالات علمی فنی مهندسی
حامی دانش بومی ایرانیان
به نام خدا
Title: Automatic Abstract Service Generation from Web Service Communities
Authors: Xumin Liu,Hua Liu
Abstract: The concept of abstract services has been widelyadopted in service computing to specify the functionality ofcertain types of Web services. It significantly benefits keyservice management tasks, such as service discovery andcomposition, as these tasks can be first applied to a smallnumber of abstract services and then mapped to the large scaleactual services. However, how to generate abstract services isnon-trivial. Current approaches either assume the existenceof abstract services or adopt a manual process that demandsintensive human intervention. We propose a novel approach tofully automate the generation of abstract services from a servicecommunity that consists of a set of functionally similar services.A set of candidate outputs are first discovered based on prede-fined support ratio, which determines the minimum number ofservices that produce the outputs. Then, the matching inputsare identified to form the abstract services. We propose a setof heuristics to effectively prune a large number of candidateabstract services. An comprehensive experimental study onreal world web service data is conducted to demonstrate theeffectiveness and efficiency of the proposed approach.
Publish Year: 2012
Publisher: ICWS - IEEE
Number of Pages: 8
موضوع: کاربرد وب سرویسها
ایران سای – مرجع مقالات علمی فنی مهندسی
حامی دانش بومی ایرنیان
به نام خدا
Title: Query-Specific Visual Semantic Spaces for Web Image Re-ranking
Authors: Xiaogang Wang,Ke Liu,Xiaoou Tang,
Abstract: Image re-ranking, as an effective way to improve the re-sults of web-based image search, has been adopted by cur-rent commercial search engines. Given a query keyword, apool of images are first retrieved by the search engine basedon textual information. By asking the user to select a queryimage from the pool, the remaining images are re-rankedbased on their visual similarities with the query image. Amajor challenge is that the similarities of visual features donot well correlate with images_ semantic meanings whichinterpret users_ search intention. On the other hand, learn-ing a universal visual semantic space to characterize highlydiverse images from the web is difficult and inefficient.In this paper, we propose a novel image re-rankingframework, which automatically offline learns different vi-sual semantic spaces for different query keywords throughkeyword expansions. The visual features of images are pro-jected into their related visual semantic spaces to get se-mantic signatures. At the online stage, images are re-rankedby comparing their semantic signatures obtained from thevisual semantic space specified by the query keyword. Thenew approach significantly improves both the accuracy andefficiency of image re-ranking. The original visual featuresof thousands of dimensions can be projected to the seman-tic signatures as short as 25 dimensions. Experimental re-sults show that 20% - 35% relative improvement has beenachieved on re-ranking precisions compared with the state-of-the-art methods.
Publish Year: 2011
Published in: CVPR - IEEE
Number of Pages: 8
موضوع: وب معنایی
ایران سای – مرجع مقالات علمی فنی مهندسی
حامی دانش بومی ایرانیان
به نام خدا
Title: Video Based Palmprint Recognition
Authors: Chhaya Methani and Anoop M Namboodiri
Abstract: The use of camera as a biometric sensor is desir-able due to its ubiquity and low cost, especially for mo-bile devices. Palmprint is an effective modality in suchcases due to its discrimination power, ease of presen-tation and the scale and size of texture for capture bycommodity cameras. However, the unconstrained na-ture of pose and lighting introduces several challengesin the recognition process. Even minor changes in poseof the palm can induce significant changes in the vis-ibility of the lines. We turn this property to our ad-vantage by capturing a short video, where the naturalpalm motion induces minor pose variations, providingadditional texture information. We propose a method toregister multiple frames of the video without requiringcorrespondence, while being efficient. Experimental re-sults on a set of different 100 palms show that the use ofmultiple frames reduces the error rate from 12.75% to4.7%. We also propose a method for detection of poorquality samples due to specularities and motion blur,which further reduces the EER to 1.8%.
Publish Year: 2010
Publisher: ICPR - IEEE
Number of Pages: 4
موضوع: تشخیص اثر کف دست
ایران سای – مرجع مقالات علمی فنی مهندسی
حامی دانش بومی ایرانیان
به نام خدا
Title: Agile and Efficient MIMO System for Smart Phone Terminals
Authors: Osama N Alrabad, Elpiniki P Tsakalaki, Mauro Pelosi, Gert F Pedersen
Abstract: The paper proposes a novel multi-input multi-output (MIMO) system architecture that covers most of the high L TE bands. The system is comprised of four small loop antennas. Each antenna has two ports, one for communication and one for control. The control port is used for tuning the loop antenna where impressive frequency agility using a single capacitor is obtained. A good level of inherent isolation among the four loop antennas is maintained over the different frequency bands. The MIMO performance of the proposed system is evaluated through its spectral efficiency versus frequency. Finally, the information bandwidth of the MIMO system can be defined by comparing its spectral efficiency against the spectral efficiency of three ideal MIMO antennas.
Publish Year: 2013
Published in: iWat - IEEE
Number of Pages: 4
موضوع: تلفنهای هوشمند
ایران سای – مرجع مقالات علمی فنی مهندسی
حامی دانش بومی ایرانیان