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The Design and Implementation of a Sequence Database System * docx

The Design and Implementation of a Sequence Database System * docx

The Design and Implementation of a Sequence Database System * docx

... also several open research issues in the design of systems based on the E-ADT paradigm, and in extensions of the paradigm to handle optimizations that span data types. Acknowledgements The ... This paper discusses the design and implementation of SEQ, a database system with support for sequence data. SEQ models a sequence as an ordered collection of records, and supports a declarative ... declarative sequence query language based on an algebra of query operators, thereby permitting algebraic query optimization and evaluation. SEQ has been built as a component of the PREDATOR database...
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The Design and Implementation of a Log-Structured File System

The Design and Implementation of a Log-Structured File System

... separate data area is reserved for this purpose. The separate data area of these database systems meansthat they do not need the segment cleaning mechanisms of the Sprite LFS to reclaim log space. ... again. The bandwidth of each of the five phases isshown separately. Sprite LFS has a higher write bandwidth and the same read bandwidth as SunOS with the exception of sequen-tial reading of a file ...  ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ ✁ systems view the log as the most up to date ‘‘truth’’ about the state of the data on disk. The main difference is that database systems do not use the log as the final repositoryfor data: a...
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Tài liệu Báo cáo khoa học:

Tài liệu Báo cáo khoa học: "DESIGN AND IMPLEMENTATION OF A LLXICAL DATA BASE " docx

... specifications and the implementation of a particular concept of word-based lexicon to be used for large natural language processing systems such as machine translation systems, and compares ... translation system or any other type of natural language processing program that must be able to handle very large amounts of text necessitates dictionaries of substantial size, of the order of at ... as in read-§, read-inR, book-s. Derivational morphology, on the other hand, deals with the addition of affixes which can modify the meaning of the word, and very often its categorial status,...
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Design and Implementation of a Three-Phase Induction Motor Control Scheme

Design and Implementation of a Three-Phase Induction Motor Control Scheme

... motor’s many advantages are clearly explained. Wildi also presents the two types of induction motors: the squirrel cage induction motor” and the “wound motor”. An explanation of the advantages and ... Marshall Brain. It provides a basic introduction onto how a hybrid car works. Within this article, the definition of the hybrid car and its potential advantages are stated. The concept of the ... provides an induction motor every advantage that DC machine control can have, while freeing itself from mechanical commutation drawbacks [9]. It is anticipated that the application of the 2001 Thesis...
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Tài liệu Experiences in Design and Implementation of a High Performance Transport Protocol doc

Tài liệu Experiences in Design and Implementation of a High Performance Transport Protocol doc

... Efficiency and Fairness Characteristics•Takes 7.5 seconds to reach 90% of the link capacity, independent of BDP•Satisfies max-min fairness if all the flows have the same end-to-end link capacity–Otherwise, ... 1000ms Fairness and Friendliness50 TCP flows and 4 UDT flows between SARA and StarLightRealtime snapshot of the throughput The 4 UDT flows have similar performance and leave enough space ... (Mbps)Fairness•Fair bandwidth sharing between networks with different RTTs and bottleneck capacities –330 Mb/s each for the 3 flows from Chicago to Chicago Local via 1Gb/s, Amsterdam via 1Gb/s...
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Tài liệu The Design and Performance of a Real-time CORBA Event Service doc

Tài liệu The Design and Performance of a Real-time CORBA Event Service doc

... program-ming tasks, such as object registration, location, and acti-vation; request demultiplexing; framing and error-handling;parameter marshalling and demarshalling; and operation dis-patching.Figure ... shows an implementation of the Dispatching Module that allocates a real-time thread(or pool of threads) to each priority queue. The advantage of this model is that the dispatcher can lever-age ... its deadline will be met, based on the publishedparameters of each schedulable operation.One advantage of our approach is that operation invoca-tions only pay the overhead of the C++ virtual...
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The Duality of Memory and Communication in the Implementation of a Multiprocessor Operating System

The Duality of Memory and Communication in the Implementation of a Multiprocessor Operating System

... in nature to a data manager which fails to freedata, but is easier to detect and prevent.• Data manager changes data. A malicious data manager may change the value of its data on each cacherefresh. ... when the data manager relinquishes that memory. If the data manager does not process and release the data within an adequate period of time, the data may then be paged out to the default pager. ... only have to exchange a single message with the server to get access to the array and, ifother clients had already referenced the data of the array, the physical memory cache of the array would...
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the meaning and structure of a narrative a systemic functional analysis

the meaning and structure of a narrative a systemic functional analysis

... function of language as central (what language does and how language does it)rather than placing the elements of language and their combination (known as structuralapproaches) as central. With ... hyponym, and collocation. The analysis is based on the Halliday’s (1994) and Halliday and Hasan’s(1997) procedure. The details will be presented as follows:Lexical RelationKumiko Tsuchida is a Japanese ... and the Japanese embassy.- Mood: declarative- Modality: ability of the main character on the past3. Mode: - Medium written channel- High lexical density and parataxis and low grammaticalintricacy.CHAPTER...
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