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Formal analysis of cross-validation based on decremental sampling scheme

Formal analysis of cross-validation based on decremental sam...

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ieee international conference on Granular computing (GRC)

作者： Shusaku Tsumoto Shoji Hirano Department of Medical Informatics Shimane University Shimane Japan

Cross validation method has been widely used for estimation of performance of classifiers and statistical method. However, compared with other resampling methods, cross-validation has not yet theoretically investigated since the sampling scheme is based not only on stochasticity but also on set-based processing. This paper proposes a new framework for evaluation of cross-validation methods based on decremental sampling scheme. Decremental sampling scheme is a reversed form of incremental sampling which gives estimated values of statistical indices when some samples are deleted from an original dataset, dual to ones obtained by incremental scheme. Interestingly, if we focus on one target relation and one target concept, four possibilities should be considered for deletion of an example, and updates of statistical indices are obtained as simple formulae, which depends on the characteristics of a original dataset. We applied this technique to the leave-one out method for rules defined by the propositions whose constraints were defined by inequalities of accuracy and coverage. The following results are obtained: first, estimated values of statistical indices are equal to the original values. Second, the variance of these indices are obtained as a simple for formula of the number of total examples, and the the size of supporting sets of a target relation and a target concept, which will converge to 0 when the size of a given dataset is sufficiently large. Thus, the main contributed part of estimation is on the usage of thresholds for statistical indices. Especially, rules located in the boundary of thresholds lead to complex behavior of cross-validated estimation. The results show that the evaluation framework gives a powerful tool for evaluation of the leave-out method.

关键词： Accuracy Estimation Error analysis Probabilistic logic Set theory Educational institutions Approximation methods

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Towards Better Semantics for Services in eHealth Standards: A Reference Ontology Approach

Towards Better Semantics for Services in eHealth Standards: ...

引用

international Workshop on Enterprise Distributed Object computing, EDOCW

作者： Zoran Milosevic João Paulo A. Almeida Julio C. Nardi Deontik Pty Ltd Brisbane Australia Ontology & Conceptual Modeling Research Group (NEMO) Federal University of Espírito Santo Vitória Brazil Informatics Department Federal Institute of Espírito Santo Colatina Brazil

Responding to a wide range of interoperability requirements for eHealth, the HL7 standardization organization has recently published an initial version of the SOA Healthcare Ontology (SHO). The purpose of this effort is to serve as a shared reference conceptual model, which can guide the definition of service-related aspects of future eHealth standards and solutions. In this paper, we analyse the SOA Healthcare Ontology using a well-founded ontological approach referred to as UFO-S. UFO-S is a reference ontology that characterizes the notion of service by applying the concepts of commitments and claims and harmonizing several views of services from a broad perspective. Our objective is to provide an ontological foundation to this new HL7 standardization effort. Given that UFO-S is formalized and defined according to a sound foundational ontology, we believe this paper can serve as a basis for further improvement in the formalization and revision of SHO and its conceptual representation.

关键词： Business Ontologies Medical services Semantics Unified modeling language Service-oriented architecture Communities

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Examining Adaptive Case Management to Support Processes for Enterprise Architecture Management

Examining Adaptive Case Management to Support Processes for ...

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international Workshop on Enterprise Distributed Object computing, EDOCW

作者： Matheus Hauder Dominik Münch Felix Michel Alexej Utz Florian Matthes Technische Universität München (TUM) Chair for Informatics 19 (sebis) Garching bei München Germany Technische Universitat Munchen Munchen Bayern DE

Enterprise Architecture (EA) management is a well-defined practice for conducting coherent analysis, design, planning, and implementation for the successful execution of business strategy. In practice many organizations are struggling with EA frameworks since the processes to manage the EA are not adequately supported. In this paper we examine Adaptive Case Management (ACM) as an emerging paradigm to support agile, lean, and collaborative processes for EA management (EAM). In contrast to traditional workflow management, ACM empowers end users to adapt their processes at run-time. Based on the findings of an extensive literature review we derived requirements for ACM and developed a prototype based on these requirements to support processes for EAM. We applied our solution for the development of a planned state of the architecture in the EA department of a German insurance organization. The findings from expert interviews with three enterprise architects and two EA consultants of this insurance organization are very promising and provide valuable insights how more effective process support for EAM can be achieved in the future.

关键词： Organizations Prototypes Maintenance engineering Bibliographies Interviews Process control

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A multi-drop distributed smart sensor network based on ieee1451.3

A multi-drop distributed smart sensor network based on IEEE1...

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2014 international conference on informatics, Networking and Intelligent computing(INIC 2014)

作者： H.W.Lu L.H.Shang M.Zhou School of Computer Science and Engineering Beihang University School of Energy and Power Engineering Huazhong University of Science and Technology

Traditional sensor networks,with centralized point-to-point architecture and various sensors,usually use a mass of cables,which will result in high cable costs,complex wiring,space occupying,deployment and maintaining *** distributed multi-drop system defined by ieee1451.3 and the power line communication technology can reduce the *** paper presents a new smart sensor network based on the ieee1451.3 and power line communication *** architecture is proposed with the characteristics of scalability and portability,and a prototype based on it was developed and analysed.

关键词： A multi-drop distributed smart sensor network based on ieee1451.3

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Shared Memory Buffer Management for Heterogeneous Packet Processing

Shared Memory Buffer Management for Heterogeneous Packet Pro...

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international conference on Distributed computing Systems

作者： Patrick Eugster Kirill Kogan Sergey Nikolenko Alexander Sirotkin Department of Computer Science Purdue University Steklov Institute of Mathematics at St. Petersburg of the Russian Academy of Sciences Higher School of Economics National Research University St. Petersburg Institute for Informatics of the Russian Academy of Sciences

Packet processing increasingly involves heterogeneous requirements. We consider the well-known model of a shared memory switch with bounded-size buffer and generalize it in two directions. First, we consider unit-sized packets labeled with an output port and a processing requirement (i.e., packets with heterogeneous processing), maximizing the number of transmitted packets. We analyze the performance of buffer management policies under various characteristics via competitive analysis that provides uniform guarantees across traffic patterns (Borodin and El-Yaniv, 1998). We propose the Longest-Work-Drop policy and show that it is at most 2-competitive and at least sqrt 2}-competitive. Second, we consider another generalization, posed as an open problem in [10], where each unit-sized packet is labeled with an output port and intrinsic value, and the goal is to maximize the total value of transmitted packets. We show first results in this direction and define a scheduling policy that, as we conjecture, may achieve constant competitive ratio. We also present a comprehensive simulation study that validates our results.

关键词： Optimized production technology Switches Ports (Computers) Educational institutions Upper bound Memory management

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A cross-layer approach for improving WiFi performance

A cross-layer approach for improving WiFi performance

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international Wireless Communications and Mobile computing conference, IWCMC

作者： Kien Nguyen Yusheng Ji Shigeki Yamada National Institute of Informatics Tokyo Japan

This paper introduces a cross-layer implementation, named WiPoMu, that aims to improve efficiency and resilience of the traditional WiFi model. WiPoMu is developed based on three key technologies: Wireless virtualization, Policy routing, and Multipath TCP (MPTCP). Specifically, WiPoMu adopts the wireless virtualization to create multiple virtual WiFi interfaces on a single physical one, hence WiPoMu enables concurrent connections with different access points (APs). In addition, WiPoMu leverages the policy routing and MPTCP in order to efficiently direct and schedule traffic flows over multiple virtual interfaces. On the other hand, WiPoMu is transparent to users since it requires no modification in the physical and application layers. We have conducted evaluations to validate the efficiency of WiPoMu on an indoor testbed and a real home network. The evaluation results show that a WiFi client equipped WiPoMu is able to establish multiple active paths to Internet across different APs. Besides that, WiPoMus is resilient to path failure by achieving seamless handover between the active paths. Furthermore, WiPoMu improves up to 300% aggregated throughput comparing to the traditional WiFi model using TCP in the testbed.

关键词： Servers Switches ieee 802.11 Standards Wide area networks Shape

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A decision-theoretic planning approach for clinical practice guideline modelling

A decision-theoretic planning approach for clinical practice...

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ieee EMBS international conference on Information Technology Applications in Biomedicine (ITAB)

作者： Dionisio Acosta Juan M. Garcia-Gomez CHIME The Farr Institute of Health Informatics Research UK IBIME Universitat Politecnica de Valencia Valencia Spain

Current formalisms for modelling a Clinical Practice Guideline (CPG) as a Computer-Interpretable Guideline (CIG) do not support the explicit representation of uncertainty due to the unpredictability of treatment outcomes and the incomplete knowledge of the actual patient condition. Given this limitation, the existing CIG approaches support only the computation of patient-specific diagnostic and treatment recommendations for the immediate next step in the patient care-pathway from the clinical perspective. Some existing approaches allow the computation of patient-specific care plans accounting for resource and time constraints, however they do not explicitly model outcomes and clinical data uncertainty. In this paper we propose a decision-theoretic planning approach to modelling and automatic computation of patient-specific care plans that addresses these limitations, whereby adherence to CPGs is maximised given specific, but uncertain, patient data and clinical outcomes. The premise of this work is that both patient and clinician decision making are better modelled and supported by computing care plans instead of single point-of-care recommendations. In this paper we introduce and motivate the clinical problem, present a formal mathematical specification of the approach and we compare our approach with existing ones from the point of view of CIG modelling. Finally we outline further research and discuss aspects that would prove crucial for the implementation of the approach.

关键词： Computational modeling Guidelines Planning Uncertainty Mathematical model Decision making Biological system modeling

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Prediction and Evaluation of Traffic States at Signalized Intersections

Prediction and Evaluation of Traffic States at Signalized In...

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2014 ieee international conference on Service Operations and Logistics,and informatics

作者： Ji-quan Shen Qing-jie Kong State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of Sciences School of Computer Science and Technology Henan Polytechnic University Member IEEE

The parallel transportation system based on the method of ACP（Artificial systems,computing experiments,Parallel Control）will promote the level of city traffic intelligent decision and scientific management.A key problem in the system is how to design a computing experiment method to predict and evaluate the traffic state by real-time and *** paper introduces the discrete-time queuing model to analyze the traffic flow at the signalized intersection and gives the evaluation conditions of the traffic ***,the evaluation conditions are applied to judge the traffic state based on the prediction data of traffic flows from the grey *** show the method is effective and feasible.

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Heterogeneous CPU-GPU computing for the finite volume method on 3D unstructured meshes

Heterogeneous CPU-GPU computing for the finite volume method...

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international conference on Parallel and Distributed Systems (ICPADS)

作者： Johannes Langguth Xing Cai Simula Research Laboratory Norway Department of Informatics University of Oslo Oslo Norway

A recent trend in modern high-performance computing environments is the introduction of accelerators such as GPU and Xeon Phi, i.e. specialized computing devices that are optimized for highly parallel applications and coexist with CPUs. In regular compute-intensive applications with predictable data access patterns, these devices often outperform traditional CPUs by far and thus relegate them to pure control functions instead of computations. For irregular applications however, the gap in relative performance can be much smaller, and sometimes even reversed. Thus, maximizing overall performance in such systems requires that full use of all available computational resources is made. In this paper we study the attainable performance of the cell-centered finite volume method on 3D unstructured tetrahedral meshes using heterogeneous systems consisting of CPUs and multiple GPUs. Finite volume methods are widely used numerical strategies for solving partial differential equations. The advantages of using finite volumes include built-in support for conservation laws and suitability for unstructured meshes. Our focus lies in demonstrating how a workload distribution that maximizes overall performance can be derived from the actual performance attained by the different computing devices in the heterogeneous environment. We also highlight the dual role of partitioning software in reordering and partitioning the input mesh, thus giving rise to a new combined approach to partitioning.

关键词： Graphics processing units Instruction sets Hardware Bandwidth Particle separators Three-dimensional displays Multicore processing

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Q-Learning: From Computer Network Security to Software Security

Q-Learning: From Computer Network Security to Software Secur...

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international conference on Machine Learning and Applications (ICMLA)

作者： Arisoa S. Randrianasolo Larry D. Pyeatt School of Computing and Informatics Lipscomb University Nashville TN USA Department of Mathematics and Computer Science South Dakota School of Mines and Technology Rapid City SD USA

Reinforcement learning techniques become more popular in computer network security. The same reinforcement learning techniques developed for network security can be applied to software security as well. This research summarizes a work in progress attempt to incorporate Q-learning algorithm in software security. The Q-learning method is embedded as part of the software itself to provide a security mechanism that has ability to learn by itself to develop a temporary repair mechanism. The results of the experiment express that given the right parameters and the right setting the Q-learning approach rapidly learns to block all malicious actions. Data analysis on the Q-values produced by the software can provide security diagnostic as well. A larger scale experiment is expected to be seen in the future work.

关键词： Connectors Security Maintenance engineering Software systems Learning (artificial intelligence) Detectors

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