期刊文献+
共找到87篇文章
< 1 2 5 >
每页显示 20 50 100
《现代汉语词典》(第6版)中的理据信息 被引量:6
1
作者 李二占 《同济大学学报(社会科学版)》 CSSCI 北大核心 2015年第1期116-124,共9页
《现代汉语词典》(第6版)中的不少词语与释义包含着或显或隐的理据信息,可以进一步分为背景知识型、外来语型、隐喻型、内部形式型和释义型等五类。前三类一般有专门的元语提示词,标释明确。后两类基于语素或"字",是理据资讯... 《现代汉语词典》(第6版)中的不少词语与释义包含着或显或隐的理据信息,可以进一步分为背景知识型、外来语型、隐喻型、内部形式型和释义型等五类。前三类一般有专门的元语提示词,标释明确。后两类基于语素或"字",是理据资讯的主体;它们有的一目了然、不言而喻,有的却需推求、激活。《现代汉语词典》理据信息表露既呈现出诸如"词的构成语素与词义大体挂钩,许多词的理据因此较为透明"等特点,也存在有"指导目标欠明、分类标准不一、标释手段隐晦"等不足,但整体上符合《牛津》、《韦氏》等国际性外语词典提供词源理据的通行做法,开创并引领了国内辞书界"词义词典"增附理据元素的新范式。 展开更多
关键词 《现代汉语词典》 释词 内部形式 理据信息
下载PDF
《牛津高阶英汉双解词典(第8版)》词源的理据信息考察 被引量:2
2
作者 李二占 《外语教学理论与实践》 CSSCI 北大核心 2017年第3期25-33,56,共10页
《牛津高阶英汉双解词典》自第6版起开始标注词源,第8版则达到231条之多。这些词源大都(至少88%)具有理据性质,故已属理据信息范畴,从而反映着国内外词典编纂的新动态。因此,本文基于词语理据论尤其是词源、理据、词典三者的交互关系,... 《牛津高阶英汉双解词典》自第6版起开始标注词源,第8版则达到231条之多。这些词源大都(至少88%)具有理据性质,故已属理据信息范畴,从而反映着国内外词典编纂的新动态。因此,本文基于词语理据论尤其是词源、理据、词典三者的交互关系,深入探究这200余条词源理据的分布、启迪、应用等议题。研究表明:《牛津高阶英汉双解词典》以元语言"origin"字样而标注词源的行为,首次突破学习型语文词典不设词源版块的旧传统,进而形成"学习型词典+词源"的新模式;其所收录词源与理据信息的重合,更能够在理论上促进词典编纂与词语理据之间的学科融合,而且在实践上蕴含着"学习型词典+理据信息"的辞书编写大趋势。 展开更多
关键词 《牛津高阶英汉双解词典》第8版 词源 理据信息 词典编纂
原文传递
Design and Research of Information Processing System Based on Mix Platform
3
作者 董宁 徐立新 +1 位作者 何超 张宇河 《Journal of Beijing Institute of Technology》 EI CAS 1999年第3期294-299,共6页
Aim To develop an information processing system with real time processing capability and artistic user interface for the optoelectronic antagonism general measuring system. Methods The A/D board and the multifun... Aim To develop an information processing system with real time processing capability and artistic user interface for the optoelectronic antagonism general measuring system. Methods The A/D board and the multifunctional board communicating with every instruments were designed, data collecting and processing were realized by selecting appropriate software platform. Results Simulating results show the information processing system can operate correctly and dependably, the measuring rules, interactive interface and data handling method were all accepted by the user. Conclusion The designing approach based on the mix platform takes advantages of the two operating systems, the desired performances are acquired both in the real time processing and with the friendly artistic user interface. 展开更多
关键词 information processing real time data collection communicating protocols
下载PDF
An Application of a Multi-Tier Data Warehouse in Oil and Gas Drilling Information Management 被引量:2
4
作者 张宁生 王志伟 《Petroleum Science》 SCIE CAS CSCD 2004年第4期1-5,共5页
Expenditure on wells constitute a significant part of the operational costs for a petroleum enterprise, where most of the cost results from drilling. This has prompted drilling departments to continuously look for wa... Expenditure on wells constitute a significant part of the operational costs for a petroleum enterprise, where most of the cost results from drilling. This has prompted drilling departments to continuously look for ways to reduce their drilling costs and be as efficient as possible. A system called the Drilling Comprehensive Information Management and Application System (DCIMAS) is developed and presented here, with an aim at collecting, storing and making full use of the valuable well data and information relating to all drilling activities and operations. The DCIMAS comprises three main parts, including a data collection and transmission system, a data warehouse (DW) management system, and an integrated platform of core applications. With the support of the application platform, the DW management system is introduced, whereby the operation data are captured at well sites and transmitted electronically to a data warehouse via transmission equipment and ETL (extract, transformation and load) tools. With the high quality of the data guaranteed, our central task is to make the best use of the operation data and information for drilling analysis and to provide further information to guide later production stages. Applications have been developed and integrated on a uniform platform to interface directly with different layers of the multi-tier DW. Now, engineers in every department spend less time on data handling and more time on applying technology in their real work with the system. 展开更多
关键词 drilling information management multi-tier data warehouse information processing application system
下载PDF
PROCESS DRIVEN ANALYSIS AND DESIGN OF MIS
5
作者 夏洪山 徐月芳 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 1999年第2期134-136,共3页
This paper presents the methodology of process driven analysis to eliminate the redundant information conducted from homogeneous procedures in management system. Process flow is emphasized and events triggered by pro... This paper presents the methodology of process driven analysis to eliminate the redundant information conducted from homogeneous procedures in management system. Process flow is emphasized and events triggered by process based states are described. 展开更多
关键词 process flow information flow data flow MANAGEMENT
下载PDF
GQL:Extending XQuery to Query GML Documents 被引量:9
6
作者 GUAN Jihong ZHU Fubao ZHOU Jiaogen NIU Liping 《Geo-Spatial Information Science》 2006年第2期118-126,共9页
GML is becoming the de facto standard for electronic data exchange among the applications of Web and distributed geographic information systems. However, the conventional query languages (e. g. SQL and its extended v... GML is becoming the de facto standard for electronic data exchange among the applications of Web and distributed geographic information systems. However, the conventional query languages (e. g. SQL and its extended versions) are not suitable for direct querying and updating of GML documents. Even the effective approaches working well with XML could not guarantee good results when applied to GML documents. Although XQuery is a powerful standard query language for XML, it is not proposed for querying spatial features, which constitute the most important components in GML documents. We propose GQL, a query language specification to support spatial queries over GML documents by extending XQuery. The data model, algebra, and formal semantics as well as various spatial Junctions and operations of GQL are presented in detail. 展开更多
关键词 XML GML spatial feature query language XQUERY
下载PDF
Event-based incremental updating of spatio-temporal database 被引量:10
7
作者 周晓光 陈军 +2 位作者 蒋捷 朱建军 李志林 《Journal of Central South University of Technology》 2004年第2期192-198,共7页
Based on the relationship among the geographic events, spatial changes and the database operations, a new automatic (semi-automatic) incremental updating approach of spatio-temporal database (STDB) named as (event-bas... Based on the relationship among the geographic events, spatial changes and the database operations, a new automatic (semi-automatic) incremental updating approach of spatio-temporal database (STDB) named as (event-based) incremental updating (E-BIU) is proposed in this paper. At first, the relationship among the events, spatial changes and the database operations is analyzed, then a total architecture of E-BIU implementation is designed, which includes an event queue, three managers and two sets of rules, each component is presented in detail. The process of the E-BIU of master STDB is described successively. An example of building’s incremental updating is given to illustrate this approach at the end. The result shows that E-BIU is an efficient automatic updating approach for master STDB. 展开更多
关键词 incremental updating geographic event spatial change database operation MANAGER
下载PDF
A Trajectory-Oriented, Carriageway-Based Road Network Data Model,Part 2:Methodology 被引量:10
8
作者 LI Xiang LIN Hui 《Geo-Spatial Information Science》 2006年第2期112-117,150,共7页
This is the second of a three-part series of papers which presents the principle and architecture of the CRNM, a trajectory-oriented, carriageway-based road network data model. The first part of the series has introdu... This is the second of a three-part series of papers which presents the principle and architecture of the CRNM, a trajectory-oriented, carriageway-based road network data model. The first part of the series has introduced a general background of building trajectory-oriented road network data models, including motivation, related works, and basic concepts. Based on it, this paper describs the CRNM in detail. At first, the notion of basic roadway entity is proposed and discussed. Secondly, carriageway is selected as the basic roadway entity after compared with other kinds of roadway, and approaches to representing other roadways with carriageways are introduced. At last, an overall architecture of the CRNM is proposed. 展开更多
关键词 TRAJECTORY road network data model CARRIAGEWAY GIS GIS-T
下载PDF
A Trajectory-Oriented Carriageway-Based Road Network Data Model, Part 1: Background 被引量:10
9
作者 LI Xiang LIN Hui 《Geo-Spatial Information Science》 2006年第1期65-70,共6页
This is the first of a three-part series of pape rs which introduces a general background of building trajectory-oriented road net work data models, including motivation, related works, and basic concepts. The p urpos... This is the first of a three-part series of pape rs which introduces a general background of building trajectory-oriented road net work data models, including motivation, related works, and basic concepts. The p urpose of the series is to develop a trajectory-oriented road network data mode l, namely carriageway-based road network data model (CRNM). Part 1 deals with t he modeling background. Part 2 proposes the principle and architecture of the CR NM. Part 3 investigates the implementation of the CRNM in a case study. In the p resent paper, the challenges of managing trajectory data are discussed. Then, de veloping trajectory-oriented road network data models is proposed as a solution and existing road network data models are reviewed. Basic representation approa ches of a road network are introduced as well as its constitution. 展开更多
关键词 TRAJECTORY road network data model CARRIAGEWAY GIS GIS-T
下载PDF
Mining Maximal Frequent Patterns in a Unidirectional FP-tree 被引量:1
10
作者 宋晶晶 刘瑞新 +1 位作者 王艳 姜保庆 《Journal of Donghua University(English Edition)》 EI CAS 2006年第6期105-109,共5页
Because mining complete set of frequent patterns from dense database could be impractical, an interesting alternative has been proposed recently. Instead of mining the complete set of frequent patterns, the new model ... Because mining complete set of frequent patterns from dense database could be impractical, an interesting alternative has been proposed recently. Instead of mining the complete set of frequent patterns, the new model only finds out the maximal frequent patterns, which can generate all frequent patterns. FP-growth algorithm is one of the most efficient frequent-pattern mining methods published so far. However, because FP-tree and conditional FP-trees must be two-way traversable, a great deal memory is needed in process of mining. This paper proposes an efficient algorithm Unid_FP-Max for mining maximal frequent patterns based on unidirectional FP-tree. Because of generation method of unidirectional FP-tree and conditional unidirectional FP-trees, the algorithm reduces the space consumption to the fullest extent. With the development of two techniques: single path pruning and header table pruning which can cut down many conditional unidirectional FP-trees generated recursively in mining process, Unid_FP-Max further lowers the expense of time and space. 展开更多
关键词 data mining frequent pattern the maximal frequent pattern Unid _ FP-tree conditional Unid _ FP-tree.
下载PDF
A Survey on Information-Centric Networking: Rationales, Designs and Debates 被引量:8
11
作者 JIANG Xiaoke BI Jun +1 位作者 NAN Guoshun LI Zhaogeng 《China Communications》 SCIE CSCD 2015年第7期1-12,共12页
The basic function of the Internet is to delivery data(what) to serve the needs of all applications. IP names the attachment points(where) to facilitate ubiquitous interconnectivity as the current way to deliver data.... The basic function of the Internet is to delivery data(what) to serve the needs of all applications. IP names the attachment points(where) to facilitate ubiquitous interconnectivity as the current way to deliver data. The fundamental mismatch between data delivery and naming attachment points leads to a lot of challenges, e.g., mapping from data name to IP address, handling dynamics of underlying topology, scaling up the data distribution, and securing communication, etc. Informationcentric networking(ICN) is proposed to shift the focus of communication paradigm from where to what, by making the named data the first-class citizen in the network, The basic consensus of ICN is to name the data independent from its container(space dimension) and session(time dimension), which breaks the limitation of point-to-point IP semantic. It scales up data distribution by utilizing available resources, and facilitates communication to fit diverse connectivity and heterogeneous networks. However, there are only a few consensuses on the detailed design of ICN, and quite a few different ICN architectures are proposed. This paper reveals the rationales of ICN from the perspective of the Internet evolution, surveys different design choices, and discusses on two debatable topics in ICN, i.e.,self-certifying versus hierarchical names, and edge versus pervasive caching. We hope this survey helps clarify some mis-understandings on ICN and achieve more consensuses. 展开更多
关键词 information-centric networking content-centric networking future internet architecture named-data networking PUBLISH-SUBSCRIBE
下载PDF
Research on Evaluation of Degree of Complexity of Mining Fault Network Based on GIS 被引量:5
12
作者 ZHANG Hua WANG Yun-jia LIU Chuan-zhi 《Journal of China University of Mining and Technology》 EI 2007年第1期63-67,共5页
A large number of spatial and attribute data are involved in coal resource evaluation. Database is a relatively advanced data management technology, but its Major defects are the poor graphic and spatial data function... A large number of spatial and attribute data are involved in coal resource evaluation. Database is a relatively advanced data management technology, but its Major defects are the poor graphic and spatial data functions, from which it is difficult to realize scientific management of evaluation data with spatial characteristics and evaluation result maps. On account of these deficiencies, the evaluation of degree of complexity of mining fault network, based on GIS, is proposed, which integrates management of spatial and attribute data. Fractal is an index which can reflect the comprehensive information of faults' number, density, size, composition and dynamics mechanism. Fractal dimension is used as the quantitative evaluation index. Evaluation software has been developed based on a component GIS-MapX, with which the degree of complexity of fault network is evaluated quantitatively using the quantitative index of fractal dimensions in Liuqiao No.2 coal mine as an example. Results show that it is effective in acquiring model parameters and enhancing the definition of data and evaluation results with the application of GIS technology. The fault network is a system with fractal structure and its complexity can be described reasonably and accurately by fractal dimension, which provides an effective method for coal resource evaluation. 展开更多
关键词 spatial data fractal dimension fault network quantitative evaluation GIS
下载PDF
SYSTEM FOR AUTOMATIC GENERALIZATION OF TOPOGRAPHIC MAPS 被引量:2
13
作者 YAN Hao-wen LI Zhi-lin AI Ting-hua 《Chinese Geographical Science》 SCIE CSCD 2006年第2期165-170,共6页
With the construction of spatial data infi'astructure, automated topographic map generalization becomes an indispensable component in the community of cartography and geographic information science. This paper descri... With the construction of spatial data infi'astructure, automated topographic map generalization becomes an indispensable component in the community of cartography and geographic information science. This paper describes a topographic map generalization system recently developed by the authors. The system has the following characteristics: 1) taking advantage of three levels of automation, i.e. fully automated generalization, batch generalization, and interactive generalization, to undertake two types of processes, i.e. intelligent inference process and repetitive operation process in generalization; 2) making use of two kinds of sources for generalizing rule library, i.e. written specifications and cartographers' experiences, to define a six-element structure to describe the rules; 3) employing a hierarchical structure for map databases, logically and physically; 4) employing a grid indexing technique and undo/redo operation to improve database retrieval and object generalization efficiency. Two examples of topographic map generalization are given to demonstrate the system. It reveals that the system works well. In fact, this system has been used for a number of projects and it has been found that a great improvement in efficiency compared with traditional map general- ization process can be achieved. 展开更多
关键词 map generalization system map database rule library topographic map
下载PDF
Design of Central Management & Control Unit for Onboard High-Speed Data Handling System 被引量:4
14
作者 LI Yan-qin JIN Sheng-zhen NING Shu-nian 《Journal of China University of Mining and Technology》 EI 2007年第1期68-72,共5页
The Main Optical Telescope (MOT) is an important payload of the Space Solar Telescope (SST) with various instruments and observation modes. Its real-time data handling and management and control tasks are arduous. Bas... The Main Optical Telescope (MOT) is an important payload of the Space Solar Telescope (SST) with various instruments and observation modes. Its real-time data handling and management and control tasks are arduous. Based on the advanced techniques of foreign countries, an improved structure of onboard data handling systems feasible for SST, is proposed. This article concentrated on the development of a Central Management & Control Unit (MCU) based on FPGA and DSP. Through reconfigurating the FPGA and DSP programs, the prototype could perform different tasks. Thus the inheritability of the whole system is improved. The completed dual-channel prototype proves that the system meets all requirements of the MOT. Its high reliability and safety features also meet the requirements under harsh conditions such as mine detection. 展开更多
关键词 space solar telescope processing dataflow and control-flow separately onboard data handling system RECONFIGURATION
下载PDF
A Trajectory-Oriented Carriageway-Based Road Network Data Model, Part 3: Implementation 被引量:6
15
作者 LI Xiang LIN Hui 《Geo-Spatial Information Science》 2006年第3期201-205,共5页
This is the final of a three-part series of papers which mainly discusses the implementation issues of the CRNM. The first two papers in the series have introduced the modeling background and methodology, respectively... This is the final of a three-part series of papers which mainly discusses the implementation issues of the CRNM. The first two papers in the series have introduced the modeling background and methodology, respectively. An overall architecture of the CRNM has been proposed in the last paper. On the basis of the above discusses, a linear reference method (LRM) for providing spatial references for location points of a trajectory is developed. A case study is introduced to illustrate the application of the CRNM for modeling a road network in the real world is given. A comprehensive conclusion is given for the series of papers. 展开更多
关键词 TRAJECTORY road network data model CARRIAGEWAY GIS GIS-T
下载PDF
A GIS Model for Analyzing Airspace Obstructions and Safety near Airports 被引量:1
16
作者 Sze-Wei Chang 《Journal of Civil Engineering and Architecture》 2016年第5期553-562,共10页
The purpose of Federal Aviation Regulations Part 77, entitled "Objects Affecting Navigable Airspace", is to identify potential hazards and prevent adverse impacts to the safe and efficient use of navigable airspace.... The purpose of Federal Aviation Regulations Part 77, entitled "Objects Affecting Navigable Airspace", is to identify potential hazards and prevent adverse impacts to the safe and efficient use of navigable airspace. The OIS (obstruction identification surfaces) represent these regulations, identify objects that penetrate these imaginary surfaces, evaluate hazardous effects, and ensure safe separations of aircraft from obstructions. The OIS evaluation is often used for selecting airfield locations and runway orientations. More importantly, the OIS evaluation is an airport's safeguard against flawed urban development, especially for airports near rapidly expanding cities. Without accurate analysis tools, hand-calculation errors on the OIS can occur and cause adverse impacts to airport safety. Applying the GIS (geographic information system) features of geospatial data and 3D formats, this paper proposes a model named GIS Obstruction Model which is capable of precisely calculating maximum allowable heights and creating visual imagery of penetrating obstructions. The special features of the model include web-based design, adaptability to any airport, user-friendly multiple inquiry methods, quick response to online inquiries, and response with 3D visual reality. The proposed G1S Obstruction Model is useful for airport planning, architecture design, safety management or civil engineering permit review. 展开更多
关键词 Obstruction identification surfaces geographic information systems airport design obstruction evaluation obstaclelimitation surfaces.
下载PDF
On Maintenance of Inter-connectivity Among Multi-representations 被引量:1
17
作者 WANG Yan-hui MENG Hao LIU Xiao-meng 《Journal of China University of Mining and Technology》 EI 2006年第4期494-499,共6页
As the problems of conceptual and representational differences will arise among multi-representations, in- ter-connectivity maintenance among multi-representations exists as a foundational task in building multi-scale... As the problems of conceptual and representational differences will arise among multi-representations, in- ter-connectivity maintenance among multi-representations exists as a foundational task in building multi-scale data model. Since the existing methods are still not satisfactory in practice, the inter-connectivity among multiple representa- tions can be only achieved if the multi-scale model is capable of explicitly inter-relating them and dealing with their differences. So, this paper firstly explores the relation among multiple representations from the same entity, such as multi-semantic, multi-geometry, multi-attributes, hierarchical semantic relations and so on. Based on these, this paper proposes aggregation-based semantic hierarchical matching rules (ASHMR) as the basis of tackling inter-connectivity among multi-representations, and defines the available hierarchical semantic knowledge, namely semantically equal, semantically related and semantically irrelevant. According to different change among multi-representations from dif- ferent types of objects, the applications and techniques of the corresponding hierarchy inter-connectivity matching crite- rion are explored. And taken the road intersections as examples, a case in point is given in details for describing the strategies of inter-connectivity maintenance, showing that this method is feasible to deal with inter-connectivity. 展开更多
关键词 inter-connectivity multi-representation ASHMR hierarchical semantic relations data matching
下载PDF
Component-based Topological Data Model for Three-dimensional Geology Modeling 被引量:3
18
作者 HOUEnke WULixin WUYuhua JUTianyi 《Geo-Spatial Information Science》 2005年第2期122-127,共6页
On the study of the basic characteristics of geological objects and the special requirement for computing 3D geological model, this paper gives an object-oriented 3D topologic data model. In this model, the geological... On the study of the basic characteristics of geological objects and the special requirement for computing 3D geological model, this paper gives an object-oriented 3D topologic data model. In this model, the geological objects are divided into four object classes: point, line, area and volume. The volume class is further divided into four subclasses: the composite volume, the complex volume, the simple volume and the component. Twelve kinds of topological relations and the related data structures are designed for the geological objects. 展开更多
关键词 geology modeling 3D data models 3DGIS
下载PDF
The Development of a Geographic Information System(GIS) Database for Jiuzhaigou National Nature Reserve and Its Application 被引量:3
19
作者 DI Bao-feng ZHANG Kai-shan +2 位作者 TANG Ya ZHANG Ming-hua Susan L.USTIN 《Journal of Mountain Science》 SCIE CSCD 2013年第3期398-409,共12页
The objective of this paper is to develop a GIS(Geographic Information System) database for Jiuzhaigou National Nature Reserve(Jiuzhaigou,hereafter) in China and demonstrate its application as a research tool.A cost-e... The objective of this paper is to develop a GIS(Geographic Information System) database for Jiuzhaigou National Nature Reserve(Jiuzhaigou,hereafter) in China and demonstrate its application as a research tool.A cost-effective procedure was developed to compile a variety of geographical and biological data of the study area in terms of popular GIS format such as shape files.These files were further calibrated and validated using field surveys data.The developed GIS database was used to quantify the distributions of the wildlife(amphibians,mammals,and birds) using the distances of the wildlife to the centerline of the bus-tour routes.The Pearson correlation coefficient was used to quantify the correlation in space between pairs of different wildlife using the number of habitats for given space contexts.An ArcObject-based macro was developed to perform the analysis.The results showed the majority of the habitats of wildlife are located in the proximity of the tour-bus routes with an average distance ranging from 564 to 894 m depending on types of wildlife.This indicates a possibility of the disturbance to the wildlife by human activities.The correlation coefficient of the wildlife ranged from 0.36 to 0.64 depending on pairs of wildlife,indicating some correlations in space.However,due to the limited sample size,the statistical significances need to be further investigated.This paper has successfully demonstrated the use of the GIS-based database as a research tool for environmental study. 展开更多
关键词 Geographic Information System (GIS) DATABASE Remote sensing WILDLIFE CorrelationCoefficient Jiuzhaigou
下载PDF
Middle matching mining algorithm 被引量:1
20
作者 郭平 《Journal of Chongqing University》 CAS 2003年第2期63-66,共4页
A new algorithm for fast discovery of sequential patterns to solve the problems of too many candidate sets made by SPADE is presented, which is referred to as middle matching algorithm. Experiments on a large customer... A new algorithm for fast discovery of sequential patterns to solve the problems of too many candidate sets made by SPADE is presented, which is referred to as middle matching algorithm. Experiments on a large customer transaction database consisting of customer_id, transaction time, and transaction items demonstrate that the proposed algorithm performs better than SPADE attributed to its philosophy to generate a candidate set by matching two sequences in the middle place so as to reduce the number of the candidate sets. 展开更多
关键词 middle matching algorithm candidate set SPADE minimum support
下载PDF
上一页 1 2 5 下一页 到第
使用帮助 返回顶部