به نام خدا
Title: A Cognitive Link Adaptation Strategy with Differentiated Responses on Wi-Fi System-on-Chip
Authors: Taeyoung Lee, Myounghwan Lee, Jaeeun Kang, Kyungik Cho, ChilYoul Hacky Yang, and Scott Seongwook Lee
Abstract: The dynamic change of wireless channel condition causes poor Wi-Fi quality of service. To cope with the channel variation of wireless communication, the essential strategy for the physical layer with multi-rate capability is the link adaptation. However, because definite guidelines for rate changes do not exist, most link adaptation algorithms can misleadingly increase transmission rates. Therefore, we propose a cognitive link adaptation scheme, sensing link adaptation urgency and responding with differentiated rate control such as the long-term rate adaptation with a short-term rate drop. To evaluate the proposed scheme, we implement the link adaptation scheme on Wi-Fi System-on-Chip, applying the optimal HW/SW partitioning technique to reduce the SW processing delay from heavy operating calculation for the algorithm. The experiment shows that the proposed algorithm increases the packet arrival rate in a real Wi-Fi environment by reducing transmission failure due to wrong rate changes.
Publish Year: 2013
Published in: CCNC - IEEE
Number of Pages: 6
موضوع: شبکه های بی سیم
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به نام خدا
Title: Quotients and weakly algebraic sets in pseudoeffect algebras
Authors: HaiYang Li JiGen Peng
Abstract: In the paper, we show that the quotient ½E I of alattice-ordered pseudoeffect algebra E with respect to anormal weak Riesz ideal I is linearly ordered if and only ifI is a prime normal weak Riesz ideal, and ½E I is a repre-sentable pseudo MV-algebra if and only if I is an inter-section of prime normal weak Riesz ideals. Moreover, weintroduce the concept of weakly algebraic sets in pseudo-effect algebras, discuss the characterizations of weaklyalgebraic sets and show that weakly algebraic sets inpseudoeffect algebra E are in a one-to-one correspondencewith normal weak Riesz ideals in pseudoeffect algebra E:
Publish Year: 2012
Published in: Soft Computing - Springer
Number of Pages: 8
موضوع: جبر
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به نام خدا
Title: Concept-Based Readability of Web Services Descriptions
Authors: Pananya Sripairojthikoon, Twittie Senivongse
Abstract: Web Services is a technology for building distributed software applications that are built upon a set of information and communication standards. Among those standards is the Web Services Description Language (WSDL) which is an XML-based language for describing service descriptions. Service providers will publish WSDL documents of their Web services so that service consumers can learn about service capability and how to interface with the services. Since WSDL documents are the primary source of service information, readability of WSDL documents is of concern to service providers, i.e. service descriptions should be understood with ease by service consumers. Providing highly readable service descriptions can then be used as a strategy to attract service consumers. However, given highly readable information in the WSDL documents, competitors are able to learn know-how and can copy the design to offer competing services. Security attacks such as information espionage, client impersonation, command injection, and denial of service are also possible since attackers can learn about exchanged data and invocation patterns from WSDL documents. While readability of service descriptions makes Web services discoverable, it contributes to service vulnerability too. Service designers therefore should consider this trade-off when designing service descriptions. Currently there is no readability measurement for WSDL documents. We propose an approach to such measurement so that service designers can determine if readability is too low or too high with regard to service discoverability, service imitation, and service attack issues, and then can consider increasing or lowering service description readability accordingly. Our readability measurement is based on the concepts or terms in service domain knowledge. Given a WSDL document as a service description, readability is defined in terms of the use of difficult words in the description and the use of words that are key concepts in the service domain. As an example, we measure readability of the WSDL document of public Web services, and outline a method to lower or increase readability.
Publish Year: 2013
Published in: ICACT - IEEE
Number of Pages: 6
موضوع: وب سرویس
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به نام خدا
Title: The Application of Coal Cleaning Detection System based on Embedded Real-time Image Processing
Authors: Qian Mu ,Jixian Dong
Abstract: This paper introduces a high-speed image processing of embedded systems based on FPGA and DSP collaboration used in coal preparation detection technology. The system uses a modular design, including a real-time image acquisition module, DSP image processing module, and peripheral interface module. The image processing required doing the following arithmetic operations, including image smoothing to enhance, edge detection, region segmentation, gray-scale analysis, pattern recognition. After completion of the above algorithm, the system determines the image feature of coal and gangue, particularly their gray scale values and the center of gravity. By analysis of the characteristics of the image, the system identifies the gangue. The image processing is conducive to the follow-up to discharge refuse treatment.
Publish Year: 2013
Published in: ICMTMA - IEEE
Number of Pages: 3
موضوع: پردازش تصویر
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به نام خدا
Title: Qcompiler: Quantum compilation with the CSD method
Authors: YG Chen, JB Wang
Abstract: In this paper, we present a general quantum computation compiler, which maps any given quantum algorithm to a quantum circuit consisting a sequential set of elementary quantum logic gates based on recursive cosine sine decomposition. The resulting quantum circuit diagram is provided by directly linking the package output written in LaTeX to Qcircuit.tex We illustrate the use of the Qcompiler package through various examples with full details of the derived quantum circuits. Besides its accuracy, generality and simplicity, Qcompiler produces quantum circuits with significantly reduced number of gates when the systems under study have a high degree of symmetry.
Publish Year: 2013
Published in: Computer Physics Communications - Science Direct
Number of Pages: 13
موضوع: رایانش کوانتوم ، فیزیک
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حامی دانش بومی ایرانیان