Xem 1-20 trên 276 kết quả System patterns
  • During the many Java™ programming language courses we teach, we have found that only a few programmers know what design patterns are when asked. About one in ten is able to name a few patterns off the top of his or her head. Of course, the concepts behind the patterns are familiar to many programmers. When we demonstrate patterns in the classroom, developers know and recognize them.

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  • In these patterns XML proves to be a smart way to achieve the goal. Through examples, we show precise solutions that can be used alone or combined. They can be especially useful when developers need to get data that belong to opaque systems, when the separation of data from processing is a must, and when data have to cross platform boundaries.

    pdf18p doxuan 07-08-2009 207 65   Download

  • Over the past decade, PHP has transformed itself from a set of simple tools for web site development to a full-fledged object-oriented programming (OOP) language. PHP now rivals mainstream languages like Java and C# for web application development, with more and more enterprises turning to it to power their web sites. The reasons for this are clear: PHP has found the right combination of an easy-to-learn language and powerful features.

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  • Interested in developing embedded systems? Since they don't tolerate inefficiency, these systems require a disciplined approach to programming. This easy-to-read guide helps you cultivate a host of good development practices, based on classic software design patterns and new patterns unique to embedded programming. Learn how to build system architecture for processors, not operating systems, and discover specific techniques for dealing with hardware difficulties and manufacturing requirements.

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  • The chapters in this introductory section are intended to answer the following questions:  What is an embedded system?  What is a time-triggered system and what are the alternatives?  Why are time-triggered systems generally considered to be more reliable than systems based on different architectures?  What is a software pattern?  How can patterns assist in the creation of reliable embedded applications

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  • Well known and established techniques, which allow obtaining intense laser pulses, have led to the development of advanced laser system used in science and various industries. Often at times, they combine Q-switching and mode-locking techniques in a single device to achieve unprecedented average pulse powers (e.g. HiLASE, HiPER, ELI, NIF, LiFE) for scientific applications, such as secondary sources of EUV, X-ray or particles, or as inertial confinement fusion (ICF) drivers.

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  • The history of the DWARF project The starting point of developing an Augmented Reality system at the Technische Universit¨at M¨unchen was the course “Erweiterte Realit¨at: Bildbasierte Modellierung und Tragbare Computer”. It was part of the 1999 summer school organized by the Technische Universit¨at M¨unchen and the Friedrichs- Alexander Universit¨at Erlangen-N¨urnberg. Prof. Bernd Br¨ugge and Prof. Gudrun Klinker had the vision that software engineering and Augmented Reality would have a stimulating influence on each other.

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  • Technical Analysts often find a system or technical method that seems extremely profitable and convenient to follow - one that they think has been overlooked by the professionals. Sometimes they are right, but most often that method doesn't work in practical trading or for a longer time. Technical analysis uses price and related data to decide when to buy and sell. The methods used can be interpretive as chart patterns and astrology, or as specific as mathematical formulas and spectral analysis. All factors that influence the markets are assumed to be netted out as the current price....

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  • This paper describes initial work on Deep Read, an automated reading comprehension system that accepts arbitrary text input (a story) and answers questions about it. We have acquired a corpus of 60 development and 60 test stories of 3rd to 6 th grade material; each story is followed by short-answer questions (an answer key was also provided).

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  • Natural language questions have become popular in web search. However, various questions can be formulated to convey the same information need, which poses a great challenge to search systems. In this paper, we automatically mined 5w1h question reformulation patterns from large scale search log data.

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  • This paper introduces a method for the semi-automatic generation of grammar test items by applying Natural Language Processing (NLP) techniques. Based on manually-designed patterns, sentences gathered from the Web are transformed into tests on grammaticality. The method involves representing test writing knowledge as test patterns, acquiring authentic sentences on the Web, and applying generation strategies to transform sentences into items.

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  • In this paper, we adopt an n-best rescoring scheme using pitch-accent patterns to improve automatic speech recognition (ASR) performance. The pitch-accent model is decoupled from the main ASR system, thus allowing us to develop it independently. N-best hypotheses from recognizers are rescored by additional scores that measure the correlation of the pitch-accent patterns between the acoustic signal and lexical cues.

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  • Detecting the linguistic scope of negated and speculated information in text is an important Information Extraction task. This paper presents ScopeFinder, a linguistically motivated rule-based system for the detection of negation and speculation scopes. The system rule set consists of lexico-syntactic patterns automatically extracted from a corpus annotated with negation/speculation cues and their scopes (the BioScope corpus).

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  • In this paper, we describe a machine translation system called PalmTree which uses the "patternbased" approach as a fundamental framework. The pure pattern-based translation framework has several issues. One is the performance due to using many rules in the parsing stage, and the other is inefficiency of usage of translation patterns due to the exact-matching. To overcome these problems, we describe several methods; pruning techniques for the former, and introduction of example-based processing for the latter. ...

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  • In a culture like ours, long accustomed to splitting and dividing all things as a means of control, it is sometimes a bit of a shock to be reminded that, in operational and practical fact, the medium is the message. This is merely to say that the personal and social consequences of any medium-- that is, of any extension of ourselves -- result from the new scale that is introduced into our affairs by each extension of ourselves, or by any new technology. Thus, with automation, for example, the new patterns of human association tend to eliminate jobs, it...

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  • This paper is a progress report on a project in linguistically based automatic speech recognition, The domain of this project is English intonation. The system I will describe analyzes fundamental frequency contours (F0 contours) of speech in terms of the theory of melody laid out in Pierrehumbert (1980). Experiments discussed in Liberman and Pierrehumbert (1983) support the assumptions made about intonational phonetics, and an F0 synthesis program based on a precursor to the present theory is described in Pierrehumbert (1981). ...

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  • Being able to predict the placement of contrastive accent is essential for the assignment of correct accentuation patterns in spoken language generation. I discuss two approaches to the generation of contrastive accent and propose an alternative method that is feasible and computationally attractive in data-to-speech systems.

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  • This paper is part of an MSc. report on a program called GENIE (Generator of Inflected English), written in CProlog, that acts as a front end to an existing speech synthesis program. It allows the user to type a sentence in English text, and then processes it so that the synthesiser will output it with natural-sounding inflection; that is, as well as transcribing text to a phonemic form that can be read by the system, it assigns this text an fO contour. The assigning of this stress is described in this paper, and it is asserted that the...

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  • Chapter 1 - An introduction to integrated enterprise information systems. The objectives of this chapter are to provide a definition for integrated enterprise information systems, discuss the need for integrated information systems in enterprises, and assess the extent to which current enterprise information systems are integrated.

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  • Chapter 2 - Representation and patterns: an introduction to the REA enterprise ontology. The objective of this chapter is to help you understand how to analyze and create representations of enterprises that serve as the core foundation for their information systems.

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