2000 Volume 14 Issue 4
Published: 15 August 2000
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Review2000, 14(4): 1-8.This paper presents a rule system based on lexical attributes description and rule inheritance. We discuss its searching and indexing strategy , and propose a non-deterministic LSD-parsing algorithm for the first time. The rule system is scalable from attribute grammar to lexicalized grammar and can eliminate the problems of rule interacting in a linear rule base.
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Review2000, 14(4): 9-16.RChiQL is a computational model of rest rictive-Chinese-based query interface to relational database in which grammar parsing takes very important place. A new grammar named as GWERSC(Grammar with ER Semantic Characteristics) is put forward and it's parsing algorithm is designed and implemented in which the embedded Semantic Characteristics can contribute to syntactic parsing and simplify semantic processing.
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Review2000, 14(4): 17-24.Syntactic score and semantic score are used for disambiguiting during syntactic analysis and semantic analysis phases. Syntactic and semantic score can be combined with traditional syntactic and semantic analysis ,thus natural languages can be analyzed effectively. This is a kind of effective method that rule-based method is combined with statistical method. Experiments are made for syntactic and semantic score using maximum likelihood principle and k-best method ,experimental results show that for training sets and testing set the accurate rate taking into account a left context or a left and right context is higher than the accurate rate taking into account no context using two kinds of method ,the accurate rate of all training set is higher than testing set ,and the accurate rate gradually increases when the size of corpus increases for training sets.
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Review2000, 14(4): 25-28,34.Multran is a multilingual MT system with practicability as its object . The characteristic of the system is that it is able to control and run four different MT systems with one united translating programme. The technical kernel of the system is the multi-functional logical operation (MFLO) ,which is brought about by developing a series of functions ,and these functions are based on the properties of natural languages such as linearity ,discreteness , recursiveness and hierarchy , etc.
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Review2000, 14(4): 29-34.The key portions in the Vehicle License Plate Recognition (LPR) are License Plate Image Extraction and Character Image Segmentation. In this paper the two portions of an applied LPR are introduced in detail. The author designed a function to extrude the characteristics of vehicle license plate so as to extract the license plate image from complex background. In segmentation some important problems encountered in practice are put forward and solved. Theoretical analyses and experimental results demonstrate that the methods introduced in this paper are very effective. The total time from input of an image to output of the recognition results is about 0.6s.
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Review2000, 14(4): 35-41.With more and more electronic texts available ,more efficient retrieval tools are required. This article describes an extended Boolean retrieval model and its application in Chinese information retrieval systems. It also discusses retrieval improvement through relevance feedback.
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Review2000, 14(4): 42-47.We propose an efficient compression scheme for Chinese text which is based on the useful LZW method. The general-purpose compression utilities is not suited for Chinese text for its large alphabet . The key technique in our scheme is "Chinese words segment signs" which could reduce the size of the tree dictionary. The retrieve of the document is processed in the compressed file directly ,therefore ,allowing faster search at the same time.
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Review2000, 14(4): 48-52.Communication is not merely for exchange information ,but more main action is used for coordination when system occur conflict and negotiation when system need to cooperation. Tradition mechanism of protocol is limited to reach these goals. In this paper ,we discuss the action of pragmatics reasoning in solving coordination and give a pragmatics model.
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Review2000, 14(4): 53-58,64.Document transformation among different document system is a necessary approach to content sharing and cooperation. Based on the application background ,the transformation can be divided into three categories :distortion ,non-distortion and increment . Markup document uses the tag to describe the structure. This paper introduces technology of markup document-oriented document transformation ,and presents a document transformation describe language which can be used for transformation information definition ,with this definition ,user can accomplish complex transformation between different document .
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Review2000, 14(4): 59-64.This article takes the integral computation and processing of the Plax features of Mongolian whole words as the target of research ,according to the theory of computability ,based on the theory and the methods of Mongolian whole word inputting ,puts forward a kind of intelligent processing method and technique of multi nodes continuous judgement of the value of multi-variation affixes of Mongolian.
