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Search Results: 1 - 10 of 382655 matches for " <br>杨代庆 "
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A Data Structure for Normalizing MARC by Using Nested Hashtable and Dynamic Array

Yang Daiqing,<br>
现代图书情报技术 , 2007,
Abstract: This paper compares some usual methods of processing MARC in ISO2709,and gives a new data structure of nested hashtable and dynamic array to normalize MARC.The author shows how to sort the MARC data according to this data structure and delete empty fields.
Academician Ontology Modeling and Automatically Instance Storing

Yang Daiqing Zhang Aixia,<br>,张爱霞
现代图书情报技术 , 2008,
Abstract: In this paper,the academician Ontology is constructed via top-down and kernel-expanding methodology to express academician concept.The paper describes the constructing process in detail,and gives the classes,relations and some templates for collecting instance among the academician Ontology.Moreover,it provides the key strategies and codes for instance storing,which will be helpful for expression of human concept in relative fields.
Web Service Distributed Management——WSDM Standard
分布式Web Service管理——WSDM标准体系*

Liu Chunyan Yang Daiqing Peng Bin,<br>刘春燕,,彭斌
现代图书情报技术 , 2007,
Abstract: 简要介绍分布式Web Service管理标准,包括其历史起源、技术支撑以及WSDM包含的两个标准---MUWS和MOWS的主要技术内容等。
A Method for Generating Co-occurrence Matrix of Mass Data Based on Hadoop

Yang Daiqing,Zhang Zhixiong,<br>,张智雄
现代图书情报技术 , 2009,
Abstract: Mass data processing is a focal point of information techniques. This paper introduces architecture of open source parallel system-Hadoop, analyzes the MapReduce programming framework based on Hadoop, and proposes a method for generating co-occurrence matrix of mass data through multiple MapReduce operations.

现代图书情报技术 , 2007,
Abstract: ?通过对比当前iso2709格式marc数据的常规处理方法,提出一种使用嵌套哈希表及动态数组来存储marc数据的数据结构,并根据此数据结构进行排序及去空字段等操作,简化程序复杂度。
Usenet-snatcher Based on Multithread and Mass-data Storage Supporting Breakpoint Transmission

Yang Daiqing,Wang Zhiping,Wang Xing,Liu Minjian,Chang Yingchun,<br>,王志苹,王星,刘敏健,常迎春
现代图书情报技术 , 2011,
Abstract: A usenet-snatcher is designed based on multithread to improve the download-speed and MIME-parsing-speed and a storage schema supporting breakpoint transmission is also proposed. Experiment shows that the usenet-snatcher can gather articles effectively and gathering-speed under multithread is faster than single thread.
Ecological distribution of mycorrihizal fungi associated with oak in Dandong district of Liaoning Province

WANG Hui,DAI Limin,SHAO Guofan,LANG Qinglong,YANG Baoshan,DENG Hongbing,WANG Qingli,<br>王惠,力民,邵国凡,,宝山,邓红兵,
应用生态学报 , 2003,
Abstract: With plot cruising and rout investigation methods, 36 species of ectomycorrhizal fungi associated with oaks were found in natural secondary oak forest in Dandong district of Liaoning Province. They were subordinated to 7 familyies, 13 genera. Studies on the relationship of the ecological distribution of mycorrhizal fungi with tree species, tree age and seasons showed that 29 species mycorrhizal fugi preferred to grow with Q. mongolica .The species of Russulla were associated with a wider tree ages of oak, and the species of Amanita were most likely to grow with old tree. July and August were the occurrence peak of mycorrhizal fungi. 75% species occurred in July, and 100% species occurred in August. The relative density of the occurrence number was the highest in mid August (19.5%) and last August (18.4%).
Genetic Polymorphism of 23 Y Chromosome Biallelic Markers in Chinese Han Population

HUANG Dai-Xin,YANG Qing-En,Yin Hui,ZHAI Xian-Dun,YANG Rong-Zhi,<br>黄,,尹 慧,翟仙敦,荣芝
遗传 , 2006,
Abstract: To search polymorphic Y chromosome biallelic markers in Chinese Han population, and obtain their population genetic data. Genotyping of 23 biallelic markers on human Y chromosome (M7, M9, M50, M88, M89, M95, M111, M117, M119, M121, M122, M134, M159, M164, M175, M214, LINE1, MSY2, RPS4Y711, SRY465, IMS-JST164520, IMS-JST021354 and IMS-JST003305) were carried out in a sample of 160 unrelated Chinese male individuals living in Wuhan using fragment length discrepant allele specific PCR (FLDAS-PCR) and PAGE technique. In all 23 biallelic markers, genetic polymorphism were identified for 20 loci in Wuhan Han population except for M50, M159 and M164, and the ranges of gene diversity (GD) were 0.0126-0.4855. A total of 35 different haplogroups (Hg1-35) were observed and the haplogroup diversity (HD) was 0.9471. The haplogroups formed by 20 biallelic markers are highly polymorphic, and can be used in forensic science and population evolution studies.
现代图书情报技术 , 2009,
Abstract: ?海量数据的处理分析是当前信息处理技术的热点之一,介绍开源并行系统hadoop的体系结构以及基于hadoop的mapreduce编程框架,并在hadoop基础上提出一种通过多重mapreduce操作,实现海量共现矩阵的生成方法。
图书情报工作 , 2011,
Abstract: ?词汇链是文本中一系列词汇关联而成的语义链,构造词汇链有助于提高文本的连贯性,把握文本主题。借鉴概念层次网络(hnc)理论对词汇语义进行形式化描述的原理,研究基于语义网络节点遍历计算的词汇链构造方法。首先对汉语文本进行分词处理,从知识库中获得词语的hnc符号,然后对语义符号进行解析,获得词语的语义关联性并构造词汇链;最后,对词汇链进行优选处理,设定阈值获得优选词汇链。实验结果表明,该方法构造的词汇链可接受度较高,对主题标引、自动文摘、文本分类等有重要价值。
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