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ATCA/AXIe compatible board for fast control and data acquisition in nuclear fusion experiments

FUSION ENGINEERING AND DESIGN 2012年第12期87卷 2131-2135页

作者： Batista, A. J. N. Leong, C. Bexiga, V. Rodrigues, A. P. Combo, A. Carvalho, B. B. Fortunato, J. Correia, M. Teixeira, J. P. Teixeira, I. C. Sousa, J. Goncalves, B. Varandas, C. A. F. Univ Tecn Lisboa Inst Super Tecn Inst Plasmas & Fus Nucl Lab Associado Assoc EURATOM IST P-1096 Lisbon Portugal INESC ID Lisbon Portugal

An in-house development of an advanced Telecommunications computing Architecture (ATCA) board for fast control and data acquisition, with Input/Output (10) processing capability, is presented. The architecture, compatible with the ATCA (PICMG 3.4) and ATCA eXtensions for Instrumentation (AXIe) specifications, comprises a passive Rear Transition Module (RTM) for 10 connectivity to ease hot-swap maintenance and simultaneously to increase cabling life cycle. The board complies with ITER Fast Plant System Controller (FPSC) guidelines for rear 10 connectivity and redundancy, in order to provide high levels of reliability and availability to the control and data acquisition systems of nuclear fusion devices with long duration plasma discharges. Simultaneously digitized data from all Analog to Digital Converters (ADC) of the board can be filtered/decimated in a Field Programmable Gate Array (FPGA), decreasing data throughput, increasing resolution, and sent through Peripheral Component Interconnect (PCI) Express to multi-core processors in the ATCA shelf hub slots. Concurrently the multi-core processors can update the board Digital to Analog Converters (DAC) in real-time. Full-duplex point-to-point communication links between all FPGAs, of peer boards inside the shelf, allow the implementation of distributed algorithms and Multi-Input Multi-Output (MIMO) systems. Support for several timing and synchronization solutions is also provided. Some key features are onboard ADC or DAC modules with galvanic isolation, Xilinx Virtex 6 FPGA, standard Dual data Rate (DDR) 3 SODIMM memory, standard CompactFLASH memory card, intelligent Platform Management Controller (IPMC), two PCI Express x4 (generation 2) ATCA Fabric channels (dual-star topology), eleven Xilinx Aurora x1 (or other ATCA compatible communications protocol) ATCA fabric channels (full-mesh topology) and two Fast Ethernet (Precision Time Protocol - PIP ieee1588-V2 and Lan eXtensions for Instrumentation - LXI compatible) A

关键词： Fast control data acquisition PCI Express FPGA ATCA AXIe

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Real-time Virtual Instrument Platform Based on Multi-thread Technique

Real-time Virtual Instrument Platform Based on Multi-thread ...

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3rd International Conference on Manufacturing Science and Engineering (ICMSE 2012)

作者： Tao, Menglun Chen, Dingfang Lu, Quanguo Shu, Liang Zhao, Yapeng Wuhan Univ Technol Inst Intelligent Mfg & Control Wuhan 430063 Hubei Peoples R China

ISBN: (纸本)9783037853696

In Virtual instrument (VI) established for computer based automated test and control, the process with only single thread has limits when developed for acquiring high speed data, analyzing and displaying them the meaning while. Any interference from another task may block the whole running process and cause data missing. In order to increase the throughput, responding time and multi-task processing efficiency of VI, multi-thread programming with the platform LabWindows/CVI is introduced in this paper. Contents include the two strategies to establish multi-thread program, Thread pool and Asynchronous Timer, and how to protect data with multi-thread programming. Finally, a case study showed a multi-thread VI based on Asynchronous Timer method, with the comparison of performance between single thread and multi-thread program.

关键词： Virtual Instrument Multi-thread data acquisition Real-time LabWindows/CVI

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An evaluation method for context-aware systems in u-health

An evaluation method for context-aware systems in u-health

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3rd International Symposium on Ambient Intelligence, ISAmI 2012

作者： Sanchez-Pi, Nayat Carbó, Javier Molina, Jose Manuel Computer Science Department Carlos III University of Madrid Madrid Spain

ISBN: (纸本)9783642287824

Evaluations for context-aware systems can not be conducted in the same manner evaluation is understood for other software systems where the concept of large corpus data, the establishment of ground truth and the metrics of precision and recall are used. Evaluation for changeable systems like context-aware and specially developed for AmI environments needs to be conducted to assess the impact and awareness of the users. E-Health represents a challenging domain where users(patients, patients' relatives and healthcare professionals) are very sensitive to systems' response. If system failure occurs it can conducts to a bad diagnosis or medication, or treatment. So a user-centred evaluation system is need to provide the system with users' feedback. In this paper, we present an evaluation method for context aware systems in AmI environments and specially to u-Heatlh domain. © 2012 Springer-Verlag.

关键词： Diagnosis

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Advancing inter-cloud resource discovery based on past service experiences of transient resource clustering

Advancing inter-cloud resource discovery based on past servi...

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3rd International Conference on Emerging intelligent data and Web Technologies, EIDWT 2012

作者： Sotiriadis, Stelios Bessis, Nik Kuonen, Pierre School of Computing and Maths University of Derby Derby United Kingdom Department of Information and Communication Technologies University of Applied Sciences of Western Switzerland Fribourg Switzerland

ISBN: (纸本)9780769547343

Resource discovery in large-scale distributed systems is a challenging issue, mainly due to the traditional centralized topologies in which the nodes of these systems are typically organized. This unified approach has been proven to be effectual for cluster-based grids and clouds but questionable for large scale, heterogeneous and dynamically interoperable e-infrastructure such as grids and inter-clouds. The latter e-infrastructures are less tolerant with regards to scalability, elasticity and flexibility. In this work, we explore the decentralized distributed search protocols that transform nodes of large size distributed systems to act as both clients and servers. Specifically, we extend the use of a job profile specification that is generated during the user job submission process. The exploitation of the job profile will allow us to orchestrate and group different user submissions into transient inter-cloud brokering groups that represent a temporary resource cluster according to the current service submission characteristics. We suggest the clustering submissions in an inter-cloud system with the view of forming notional short-term grouped nodes that may reform over the time. In this way, the resource discovery process is becoming dynamically, that is to say, a transient group of nodes is required advancing a single request based on current time, opposed to multiple requests as currently happens. We further propose an architecture that implies nodes orchestration based on previous resource requests as well as we model a service meta-registry for inter-cloud systems to store relevant information to service submission. © 2012 ieee.

关键词： Ganglia Job Analysis grids Distributed systems Clouds multiple request

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Optimal Quality-Aware Predictor-Based Adaptation of Multimedia Messages

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6th ieee International Workshop on intelligent data acquisition and advanced computing systems - Technology and Applications (IDAACS)

作者： Pigeon, Steven Coulombe, Stephane Univ Montreal Dept Comp Sci & Operat Res Montreal PQ H3C 3J7 Canada Univ Quebec Ecole Technol Super Dept Software & Informat Technol Engn Ste Foy PQ G1V 2M3 Canada

ISBN: (纸本)9788792329295

The Multimedia Messaging Service (MMS) platform allows messages composed of various multimedia attachments to be exchanged between users of mobile devices. However, these heterogeneous devices exhibit different capabilities regarding what media types, resolution, and maximal message size they support making the adaptation of messages mandatory to ensure compatibility between sending and receiving devices. The challenge is therefore to adapt messages so that they satisfy the receiving device's constraints in a way that both maximizes the user experience and minimizes the computational cost of adaptation. Minimizing computational cost will help cope with high-volume traffic while maximizing user experience, as estimated by the perceived quality of adapted messages, will secure the service provider's user base. In this work, we propose a generic adaptation scheme based on predictors for file size and image quality resulting from transcoding parameters applied to a given image that will explicitly maximize perceived quality as estimated by the structural similarity image quality index. We will further show that our proposed method is resilient to the imprecision of the predictors and that it yields significantly better quality at a greatly reduced computational cost compared to other methods proposed in prior art.

关键词： MMS multimedia adaptation dynamic programming structural similarity user experience multimedia optimization

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Optimizing dialog strategies for conversational agents interacting in AmI environments

Optimizing dialog strategies for conversational agents inter...

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3rd International Symposium on Ambient Intelligence, ISAmI 2012

作者： Griol, David Carbó, Javier Molina, José Manuel Computer Science Department Carlos III University of Madrid Madrid Spain

ISBN: (纸本)9783642287824

In this paper, we describe a conversational agent which provides academic information. The dialog model of this agent has been developed by means of a statistical methodology that automatically explores the dialog space and allows learning new enhanced dialog strategies from a dialog corpus. A dialog simulation technique has been applied to acquire data required to train the dialog model and then explore the new dialog strategies. A set of measures has also been defined to evaluate the dialog strategy. The results of the evaluation show how the dialogmodel deviates from the initially predefined strategy, allowing the conversational agent to tackle new situations and generate new coherent answers for the situations already present in the initial corpus. The proposed technique can be used not only to develop new dialog managers but also to explore new enhanced dialog strategies focused on user adaptation required to interact in AmI environments. © 2012 Springer-Verlag.

关键词： Multi agent systems

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An open affective platform

An open affective platform

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ieee International Conference on Networked Embedded systems for Enterprise Applications

作者： Nik Thompson Terry Koziniec Tanya McGill School of Information Technology Murdoch University Perth Australia

ISBN: (纸本)9781467347211

Affective computer interfaces improve human-computer interaction by enabling the communication of the user's emotional state. To this end, subtle non-verbal methods of communication provide a rich source of information which may provide valuable affective context to the human-computer interaction. Of particular note are physiological indicators of affective state, as these are objective in nature and have been demonstrated to be successful in many studies. Physiological computing may be viewed as a data acquisition and signal processing task whereby the electrical impulses or biopotentials created by the body are captured, analyzed and recorded in a suitable format for later communication. Whilst there are a number of commercially available hardware platforms to support physiological data acquisition, these all possess limitations in a few distinct areas. Not least of these is the physical form factor. For such devices to be embedded and integrated into the next generation of computer interfaces, an open physiological platform is required. This will enable future development to build upon this foundation and concentrate on novel and unique form factors and implementation environments. This paper describes the development and implementation of an open affective platform. This hardware and software solution provides the necessary functionality to measure and describe the users underlying affective state in terms of its component dimensions. This data may then be communicated to other application software, or modules within a larger affective computing application.

关键词： Sensors Physiology Skin Hardware data acquisition Software Electrodes

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Application of preconditioned Generalized radial Basis Function Network to prediction of photovoltaic power generation

Application of preconditioned Generalized radial Basis Funct...

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ieee PES Innovative Smart Grid Technologies Conference Europe (ISGT Europe)

作者： H. Mori M. Takahashi Department of Electronics and Bioinformatics Meiji University Tama Kawasaki Japan

In this paper, an efficient method is proposed for short-time generation output prediction of PV systems. The prediction of time-series of PV generation output is too complicated to handle. The proposed method focuses on the improvement of the prediction model accuracy with a hybrid intelligent system. It consists of the precondition of input data and the predictor of multi-step ahead PV generation output. The former deals with clustering of input data to improve the performance of the predictor. It is very useful to classify data into some clusters and construct the prediction model at each cluster so that the prediction is improved due to the data similarity in the cluster. As the clustering method, DA (Deterministic Annealing) Clustering of global clustering is used due to the good performance. On the other hand, the latter makes use of an advanced GRBFN (Generalized Radial Basis Function Network) of ANN (Artificial Neural Network) as the predictor. As a result, the proposed method provides better results than the conventional ones. The effectiveness of the proposed method is demonstrated to real data of short time prediction of PV systems.

关键词： Cost function Predictive models data models Time series analysis Clustering algorithms Standards Vectors

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A BPNN-BASED DYNAMIC TRUST PREDICTING MODEL FOR DISTRIBUTED systems

A BPNN-BASED DYNAMIC TRUST PREDICTING MODEL FOR DISTRIBUTED ...

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2012 3rd ieee International Conference on Network Infrastructure and Digital Content

作者： Cheng Chen,Xiaoyong Li,Zhongying Bai Beijing Key Lab of intelligent Telecommunication Software and Multimedia,Beijing University of Posts and Telecommunications,Beijing 100876,China

To provide more trustworthy service to service requester(SR),a prior trust degree predicting method is necessary in most ***,in the distributed systems,trust model is so complex that it is very difficult to quantify and predict ***,according to human psychological cognitive behavior,a trust predicting method based on back propagation neural network(BPNN) is proposed in this ***,due to the stochastic of initial weights' assignment and search complexity for optimal weights,training algorithm can easily be trapped into local optimum,or be slow to converge or even *** on these problems,a learning rate in network training is proposed *** using adaptive data mining and knowledge discovery in multidimensional trust attributes,the model also overcomes the problem of insufficient ability of data processing in traditional models.

关键词： Trust predicting model Back propagation neural network(BPNN) Distributed systems Behavior data

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Multilevel method of data coding in WSN

Multilevel method of data coding in WSN

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6th ieee International Conference on intelligent data acquisition and advanced computing systems: Technology and Applications, IDAACS'2011

作者： Yatskiv, Vasyl Jun, Su Yatskiv, Nataliya Sachenko, Anatoly Osolinskiy, Olexandr Ternopil National Economic University Department of Information Computer Systems and Control 3 Peremoga Square Ternopil46004 Ukraine Yangtze University Computer School China

ISBN: (纸本)9781457714238

关键词： Wireless sensor networks

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