this paper describes a novel framework for tracking heart sounds. For a given heart sound component (e.g. S1) candidate features (e.g. peaks) are mapped to states and assigned appropriate local scores. A low complexit...
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ISBN:
(纸本)9781424418145
this paper describes a novel framework for tracking heart sounds. For a given heart sound component (e.g. S1) candidate features (e.g. peaks) are mapped to states and assigned appropriate local scores. A low complexity dynamic programming based algorithm Is developed to select the largest most consistent feature from the candidate features. this algorithm is also capable of detecting multiple simultaneous features for improved noise immunity. the proposed algorithm has linear complexity with time and cubic complexity withthe number of features to be tracked. Data from six swine balloon-occlusion studies are used for preliminary testing of the algorithm. the S1 amplitude and heart sound ejection time (HSET) are found to be statistically significantly correlated with changes in systolic performance due to ischemia induction.
In the last years, flexibility markets have been developed in Europe in order to support distribution system operators to manage their systems characterized by a high penetration of distributed generators. the proper ...
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abc is an extensible, optimising compiler for AspectJ. It has been designed as a workbench for experimental research in aspect-oriented programming languages and compilers. We outline a programme of research in these ...
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A lot of current approaches attempt to enrich software systems with extra-functional properties. these attempts become remarkably important withthe gradual adoption of component-based programming. Typically, extra fu...
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ISBN:
(纸本)9789898425577
A lot of current approaches attempt to enrich software systems with extra-functional properties. these attempts become remarkably important withthe gradual adoption of component-based programming. Typically, extra functional properties need to be taken into account in the phase of component binding and therefore included in the process of verifying component compatibility. Although a lot of research has been done, practical usage of extra-functional properties is still rather scarce. the main problem could be in a slow adaptability of specialized research models to rapidly changing industrial needs. We have designed a solution to this issue in the form of a modular framework which provides a formally sound yet practical means to declare, assign and evaluate extra-functional properties in the context of component-based applications. One of its strengths is applicability to a variety of industrial as well as research component models. this paper describes the models and algorithms of the framework and introduces a prototype implementation proving the concept.
In this paper we explore graph models used to illustrate the relationships between elements of designs in computer-aided design (CAD) systems. We discuss common limitations and ways to make such representations more u...
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ISBN:
(纸本)9789881902627
In this paper we explore graph models used to illustrate the relationships between elements of designs in computer-aided design (CAD) systems. We discuss common limitations and ways to make such representations more usable and interactive. In order to study common problems of symbolic representations in CAD systems, we conducted a survey of a number of CAD applications that employ graph representations in their interface and provided comparative analysis of the properties of graph representations in these systems. As a case study we used Bentley generativecomponentsTM (GC) system - a parametric CAD application that uses graph ("symbolic") view to visualize the structure of design. We conducted series of interviews with expert GC users that revealed many limitations of the GC symbolic view. To address these limitations, we developed alternative representations of symbolic view that aim at enhancing user experience withthe system and reviewed these with expert GC users. As a result of our study, we developed a set of interactive prototypes using SHriMP(1) visualization tool and Processing programming language. these provide improved ways of user interaction with symbolic representation, including better readability of the graph and, as a result, an improved support for design model analysis.
the field of software engineering originally concentrated on "programming in the small" emphasizing implementation techniques. Over the last decades, software and systems engineering expanded to a comprehens...
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ISBN:
(纸本)0769529097
the field of software engineering originally concentrated on "programming in the small" emphasizing implementation techniques. Over the last decades, software and systems engineering expanded to a comprehensive engineering discipline. Nowadays software engineering comprises requirements engineering, modeling and design, implementation and testing, installation and maintenance. Software engineering proved to be a key technology;its mastery determines the functioning of modern infrastructures and consumer products. Software development has matured from heuristic practice to an engineering discipline. In the meantime, software engineers can benefit from a solid stock of basic research addressing modeling and design techniques for sequential, concurrent, distributed, and timed systems. Software quality and reliability, security and safety, the management of change, reuse and integration pose new requirements to the practice of software engineering. A major challenge consists in integrating the developed theories into a coherent engineering framework accepted by practitioners. Software engineers face different system views described by a variety of graphical and textual formalisms. Software development must safely bridge the system views on different levels of abstraction ranging from high-level specifications to executable code. the system views center around the data model, the communication model, the state transition model, and the trace model. the data model describes the data structure in an abstract or concrete way. the communication model manifests how a component interacts withthe environment by exchanging messages. the state transition model describes an abstract implementation where an input affects an update of the internal state and a possible output. the trace model characterizes the operational behaviour of the system by a set of possible runs composed of atomic actions. the lecture classifies different system models and addresses discrete interactive sys
In this paper, we introduce the GuideForce project, whose aim is to develop automatic methods based on type systems and abstract interpretation that are capable of checking that programming guidelines related to secur...
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ISBN:
(纸本)9783662492246;9783662492239
In this paper, we introduce the GuideForce project, whose aim is to develop automatic methods based on type systems and abstract interpretation that are capable of checking that programming guidelines related to secure web programming are correctly and reasonably applied. We outline the project plan and motivation and then describe a pilot study carried out with Soot, a Java-based program analysis framework. While still maintaining high accuracy and efficiency, the focus on guidelines adds a new human-oriented component to static analysis.
We set up an experiment to evaluate JEE as a platform for product line development. While JEE provides many useful mechanisms for reuse of common services/components, still we found that systematic across-the-board re...
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the proceedings contain 38 papers. the special focus in this conference is on Software Reuse. the topics include: Integrating and reusing GUI-driven applications;source tree composition;layered development with(unix) ...
ISBN:
(纸本)9783540434832
the proceedings contain 38 papers. the special focus in this conference is on Software Reuse. the topics include: Integrating and reusing GUI-driven applications;source tree composition;layered development with(unix) dynamic libraries;concurrent execution with sequential reasoning;concepts and guidelines of feature modeling for product line software engineering;domain modeling for world wide web based software product lines with UML;enhancing component reusability through product line technology;modeling variability withthe variation point model;the impact of open-source on commercial vendors;integrating reference architecture definition and reuse investment planning;control localization in domain specific translation;model reuse with metamo del-based transformations;generation of text search applications for databases;domain networks in the software development process;supporting reusable use cases;project management knowledge reuse through scenario models;adaptation of coloured petri nets models of software artifacts for reuse;improving hazard classification through the reuse of descriptive arguments;service oriented programming: a new paradigm of software reuse;an empirical user study of an active reuse repository system;towards the formalization of a reusability framework for refactoring;extending abstract factories to decouple advanced dependencies;software fortresses;the case against a grand unification theory;international workshop on reuse economics;workshop on generativeprogramming 2002 (GP2002);industrial experience with product line approaches;workshop on software reuse and agile approaches;software architecture quality analysis methods;tutorial on practical product line scoping and modeling;generative reuse for software generation, maintenance and reengineering;building reusable test assets for a product line;architecture-centric software engineering;practical strategies and techniques for adopting software product lines;methods, techniques, and applic
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