检索出选修课程至少等于三门的学生学号,学生姓名,学生性别和选课门数

查全率=查出有效值/数据库总有效文献数(n).
王=30/n
张=28/n
王>张
查准率=查出有效值/查出文献数.
王=30/60
张=28/50
王

检索词是需要检索内容的主题词、关键词.
检索表达式是检索词按照逻辑运算组合起来的检索策略,能够体现出检索内容.
例如：要检索关于“计算机硬件的合理配置”方面的文章；
选择的检索词应为计算机、电脑、硬件、配置
检索表达式应为：（计算机 or 电脑）and 硬件 and 配置

献检索的概念有狭义和广义之分.狭义的检索（Retrieval）是指依据一定的方法,从已经组织好的大量有关文献集合中,查找并获取特定的相关文献的过程.这里的文献集合,不是通常所指的文献本身,而是关于文献的信息或文献的线索.如果真正要获取文献中所记录的信息,那么还要依据检索所取得的文献线索索取原文.
广义的检索包括信息的存储和检索两个过程(Storage and Retrieval).信息存储是指工作人员将大量无序的信息集中起来,根据信息源的外表特征和内容特征,经过整理、分类、浓缩、标引等处理,使其系统化、有序化,并按一定的技术要求建成一个具有检索功能的工具或检索系统,供人们检索和利用.而检索是指运用编制好的检索工具或检索系统,查找出满足用户要求的特定信息.
文献的构成要素应包括:知识性内容,文献符号系统,文献记录方式,文献载体,这些要素之间相互联系,相互促进,

Accession number: 20095112564446
Title: Data preprocessing method of ECG indicators when applied ECG in driver mental workload research
Authors: Xiaoli, Xie1 ; Jiangbi, Hu1 ; Xiaoming, Liu1 ; Shuyun, Wang1 ; Pingsheng, Li2
Author affiliation:
1 Transportation Research Center, Beijing University of Technology, Beijing, China
2 National Center of ITS Engineering and Technology, Beijing, China
Corresponding author: Xiaoli, X. (xxl@emails.bjut.edu.cn)
Source title: 2009 2nd International Conference on Intelligent Computing Technology and Automation, ICICTA 2009
Abbreviated source title: Int. Conf. Intelligent Comput. Technol. Autom., ICICTA
Volume: 1
Monograph title: 2009 2nd International Conference on Intelligent Computing Technology and Automation, ICICTA 2009
Issue date: 2009
Publication year: 2009
Pages: 569-572
Article number: 5287586
Language: English
ISBN-13: 9780769538044
Document type: Conference article (CA)
Conference name: 2009 2nd International Conference on Intelligent Computing Technology and Automation, ICICTA 2009
Conference date: October 10, 2009 - October 11, 2009
Conference location: Changsha, Hunan, China
Conference code: 78591
Sponsor: IEEE Intelligent Computation Society; IEEE Computer Society; Res. Assoc. Intelligent Computation Technology and Automation; Changsha University of Science and Technology; Hunan University of Science and Technology
Publisher: IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States
Abstract: Electrocardiogram (ECG) indicators are widely used in driver mental workload studies. Because ECG is always recorded continuously in experiments, ECG indicator data often have trend. To make follow-up data analysis faster and more reliable, ECG indicator data should be preprocessed to remove or extract the trend according to the aim of the experiment. However, most researchers tend to ignore this point. Based on time series theories, this paper proposed a set of methods to preprocess ECG indicator data series. In this paper, the data preprocessing method was described in detail. And an example was given to illustrate and prove the validity of the method. ? 2009 IEEE.
Number of references: 8
Main heading: Electrochromic devices
Controlled terms: Association rules - Automobile drivers - Computer science - Electrocardiography - Experiments - Intelligent computing - Time series
Uncontrolled terms: Data analysis - Data preprocessing - Data series - Mental workload - ON time - Preprocess
Classification code: 922.2 Mathematical Statistics - 912.4 Personnel - 903.1 Information Sources and Analysis - 901.3 Engineering Research - 741.3 Optical Devices and Systems - 723.4 Artificial Intelligence - 723 Computer Software, Data Handling and Applications - 722 Computer Systems and Equipment - 721 Computer Circuits and Logic Elements - 714 Electronic Components and Tubes - 701.1 Electricity: Basic Concepts and Phenomena - 461.6 Medicine and Pharmacology - 432 Highway Transportation
DOI: 10.1109/ICICTA.2009.144
Database: Compendex
Compilation and indexing terms, ? 2010 Elsevier Inc.
全文在EV2和ACM Digital Library里面都没有,我没找到.

找到几个关键词,先看看中文文献,最好是综述类的,然后仔细查,通过文献的摘要和结论等筛选你需要的,初步了解这个课题的方向之后,再查外文文献,同时做好分类

铝铸件的意思.

分类途径是根据主题词所属的学科范围来把文献信息进行归类,然后检索的时候对这些分类进行检索.
优点：能够在知道文献所属领域的情况下,尽快找到所需要的文献信息；并且可以排除标题包含检索关键词但是主题并非所要检索内容的文章；
缺点：有些文献是跨学科领域的,所以可能会检索到一些不是完全符合要求范围的文章,需要进一步排除；还有可能在分类的时候并没有把默写文章按照某一个类别归类,但是检索者正好需要的是这一领域的文章,因此可能会漏掉信息

施普林格西文全文数据库

这篇论文出自【新英格兰心理协会第五十届年度会议论文集】不属于SCI,也不属于EI,也没有被其他主流检索系统收录.
望采纳!

主题词表是主题词语言的体现,词表中的词作为文献内容的标识和查找文献的依据
我帮你查了,只能找到这么多,实在不好意思

文献检索(Information Retrieval),是指将信息按一定的方式组织和存储起来,并根据信息用户的需要找出有关的信息过程,所以它的全称又叫“信息的存储与检索(Information Storage and Retrieval),这是广义的信息检索.狭义的信息检索则仅指该过程的后半部分,即从信息集合中找出所需要的信息的过程,相当于人们通常所说的信息查寻(Information Search).
数据检索（data retrieval）是将经过选择、整理和评价（鉴定）的数据存入某种载体中,并根据用户需要从某种数据集合中检索出能回答问题的准确数据过程或技术.按查询问题的要求,分为简单检索（即单一因素的检索）和综合检索（即综合条件检索）.数据文件组织方式不同,数据检索的技术方法亦不同.对于顺序结构文件,常见方法有顺序检索、分块查找法、两分检索等.对于随机结构文件,常采用直接地址法、杂凑（hash）法等.地理信息系统中空间数据检索常涉及目标空间分布范围（行政区域、地理范围或空间关系等）及目标属性类型（地形高度、坡度、土地利用现状等）两个方面的综合条件
事实检索是情报检索的一种类型.广义的事实检索既包括数值数据的检索、算术运算、比较和数学推导,也包括非数值数据 (如事实、概念、思想、知识等) 的检索、比较、演绎和逻辑推理.它要求检索系统不仅能够从数据 (事实) 集合中查出原来存入的数据或事实,还能够从已有的基本数据或事实中推导、演绎出新的数据或事实.例如,该系统中存储有如下事实：①李明是A校的学生.②A 校的学生都学外语.如果该系统是一个事实检索系统,则它应当能回答某用户提出的“李明学外语吗?”这种问题.事实检索是情报检索中最复杂的一种.它要求系统中的数据和事实以自然语言或接近于自然语言的方式存储.不仅要存入各种数据或事实单元,还要存入各单元之间的语义关系、句法关系以及各种有关的背景知识.允许用户用自然语言提问,并能用自然语言作答.更重要的是,系统必须具有一定的逻辑推理能力和自然语言理解功能.

相关短语检索基于人工整理和数据挖掘方法结合的相关短语技术.根据语义信息、短语结构、短语词典等计算短语之间的相关关系,获取相关短语.可用于信息检索、搜索引擎等系统,向用户提供短语查询建议,帮助用户更好地进行检索.

and（*） 、or（+）和 not（-）三种.

你是南华的吧····

已经被检索了,信息如下：
This paper appears in: Advances in Optoelectronics and Micro/Nano-Optics (AOM), 2010 OSA-IEEE-COS
Accession number: 20111213848106
Issue Date: 3-6 Dec. 2010
On page(s): 1 - 4
Location: Guangzhou
E-ISBN: 978-1-4244-8392-1
Print ISBN: 978-1-4244-8393-8
References Cited: 20
INSPEC Accession Number: 11824262
Digital Object Identifier: 10.1109/AOM.2010.5713587
Date of Current Version: 14 二月 2011

Isolation and characterization of Rhodopseudomonas sp. S9-1 capable of degrading pyrazosulfuron-ethyl

ISSN: 1022-6680
IDS 号:BZT43

BIODEGRADATION OF CYPERMETHRIN BY RHODOPSEUDOMONAS PALUSTRIS GJ-22 ISOLATED FROM ACTIVATED SLUDGE

ISSN:1018-4619
IDS 号:927QP

分为植物和动物,其中植物可分为被子植物桃树、裸子植物杉树、厥类植物凤尾厥、藻类植物海带、动物可分为哺乳动物狗、软壳动物蜗牛,至于内个苍蝇嘛…不懂,就飞行动物好了

只见4、5两篇被检索,1、2、3未见被检索.如下

4、Support vector machines based defect recognition in SonicIR using 2D heat diffusion features
作者: Zeng, Z (Zeng, Zhi)1,2; Zhou, J (Zhou, Jing)3; Tao, N (Tao, Ning)1; Feng, LC (Feng, Lichun)1; Zhang, CL (Zhang, Cunlin)1; Han, XY (Han, Xiaoyan)4
来源出版物: NDT & E INTERNATIONAL 卷: 47 页: 116-123 DOI: 10.1016/j.ndteint.2011.11.001 出版年: APR 2012
被引频次: 0 (来自 Web of Science)
引用的参考文献: 17 [ 查看 Related Records ] 引证关系图
摘要: In SonicIR, when a single short pulse of 20 or 40 kHz sound wave passes through materials with mechanical discontinuities, e.g., cracks with faying surfaces, it will ordinarily cause heating of those surfaces. This study investigates the effect of support vector machines (SVM), which is a machine-learning method based on the principle of structural risk minimization, as a classifier tool to identify defects in SonicIR image sequences. One inconel sample with a known defect has been chosen to construct the training set, and the 2D heat diffusion patterns of defect and disturbing signals at two different times during the sonic pulse have been chosen as features to be used in the classification procedure. A two stages SVM classifier has been employed to recognize defects in 80 inconel and 60 titanium samples, the results indicate that SVM is a promising tool for defect recognition in SonicIR image sequences. (C) 2012 Elsevier Ltd. All rights reserved.
入藏号: WOS:000301762900015
文献类型: Article
语种: English
作者关键词: Heat diffusion; Defect signal; SonicIR; Support vector machines
KeyWords Plus: CRACKS
通讯作者地址: Zhang, CL (通讯作者),Capital Normal Univ, Beijing Key Lab Terahertz Spect & Imaging, Key Lab Terahertz Optoelect, Minist Educ,Dept Phys, Beijing 100048, Peoples R China.
地址:
1. Capital Normal Univ, Beijing Key Lab Terahertz Spect & Imaging, Key Lab Terahertz Optoelect, Minist Educ,Dept Phys, Beijing 100048, Peoples R China
2. ChongQing Normal Univ, Coll Phys & Elect Engn, Chongqing 400047, Peoples R China
3. Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Coll Elect Engn, Chongqing 400030, Peoples R China
4. Wayne State Univ, Dept Elect & Comp Engn, Detroit, MI 48202 USA
基金资助致谢:
基金资助机构 授权号
National Science Foundation of China 10804078
61079020
Project Foundation of Chongqing Municipal Education Committee KJ100605
Chongqing Normal University 06LB012
State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University) 2007DA10512710405

[显示基金资助信息][隐藏基金资助信息]
This work is supported in part by National Science Foundation of China No. 10804078 and No. 61079020, in part by the Project Foundation of Chongqing Municipal Education Committee (No. KJ100605), in part by Chongqing Normal University No. 06LB012, and in part by Visiting Scholarship of State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University) (2007DA10512710405).

出版商: ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Web of Science 类别: Materials Science, Characterization & Testing
研究方向: Materials Science
IDS 号: 911ZJ
ISSN: 0963-8695


5、Infrared thermal wave imaging for inspecting the insulation layer of superconducting busbar in thermonuclear experimental reactor
作者: Chen, DP (Chen Da-Peng)1; Zeng, Z (Zeng Zhi)2,3; Zhang, CL (Zhang Cun-Lin)3; Jin, XY (Jin Xue-Yuan)3; Zhang, Z (Zhang Zheng)1
来源出版物: ACTA PHYSICA SINICA 卷: 61 期: 9 文献号: 094207 出版年: MAY 2012
被引频次: 0 (来自 Web of Science)
引用的参考文献: 15 [ 查看 Related Records ] 引证关系图
摘要: This work aims at developing a thermal wave imaging method for testing the insulation layer of superconducting busbar in thermonuclear experimental reactor. In the paper, a film bag filled with hot water is used to heat the sample surface. The approximate theoretical model of transient heat conduction under an instantaneous cylindrical surface source in cylindrical structure is given. Through simulation and analysis of the theoretical model, it is found that differential processing of the thermal cooling signals can improve the signal contrast between defects and non-defects areas. Compared with the flash pulse excitation method, the contact excitation method can detect deep defects.
入藏号: WOS:000304514200035
文献类型: Article
语种: Chinese
作者关键词: thermonuclear experimental reactor; busbar insulation layer; contact heat excitation; thermal wave imaging
KeyWords Plus: THERMOGRAPHY; COMPONENTS
通讯作者地址: Chen, DP (通讯作者),Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China.
地址:
1. Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
2. Chongqing Normal Univ, Inst Phys & Elect Engn, Chongqing 400047, Peoples R China
3. Capital Normal Univ, Beijing Key Lab Terahertz Spect & Imaging, Key Lab Terahertz Optoelect, Minist Educ,Dept Phys, Beijing 100048, Peoples R China
基金资助致谢:
基金资助机构 授权号
National Natural Science Foundation of China 61079020
State Key Laboratory of Power Transmission Equipment & System Security and New Technology 2007DA10512710405

[显示基金资助信息][隐藏基金资助信息]
Project supported by the Joint Funds of the National Natural Science Foundation of China (Grant No. 61079020), and the Visiting Scholarship of State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Grant No. 2007DA10512710405).

出版商: CHINESE PHYSICAL SOC, P O BOX 603, BEIJING 100080, PEOPLES R CHINA
Web of Science 类别: Physics, Multidisciplinary
研究方向: Physics
IDS 号: 948PD
ISSN: 1000-3290

首先恭喜了，文章已经被EI检索了
这是检索出来的详细信息的一部分：
Accession number: 20112314027536
Title: A study on how to construct the prediction model of library lending of university library
Authors: Sun, Bao1 ; Feng, Jiangwei2, 3 ; Liu, Ling1
EI的检索号是，Accession number: 20112314027536
PS：这还有个INSPEC检索号，INSPEC Accession Number: 11988927

文章被EI收录了,信息如下：
Accession number:20114014394443
Title:Research on strategic human resource management based on knowledge management
Authors:Jiang,Daokui1 ; Zhang,Tiqin2
Author affiliation:1 School of Management,Shandong University,Ji'nan,China
2 Shandong Institute of Human Resources Development,Shandong Economic University,Ji'nan,China
Corresponding author:Jiang,D.(jdk240504@163.com)
Source title:ICEMMS 2011 - Proceedings:2011 2nd IEEE International Conference on Emergency Management and Management Sciences
Abbreviated source title:ICEMMS - Proc.:IEEE Int.Conf.Emerg.Manage.Manage.Sci.
Monograph title:ICEMMS 2011 - Proceedings:2011 2nd IEEE International Conference on Emergency Management and Management Sciences
Issue date:2011
Publication year:2011
Pages:379-382
Article number:6015700
Language:English
ISBN-13:9781424496631

现在已经检索到Applied Mechanicsand Materials,v 543-547卷了
希望对你能有所帮助.

这个你去学校图书馆电脑上检索一下就有了啊
凭空想象这么想的出来
比如说：
课题名称：
文件检索
检索词：工商管理人才培养模式
检索策略 检索式：题名检索
检索字段：标题
年度范围：1999-2009
检索结果：这个你自己按上面的条件检索一下
然后选择一些论文作为参考文献,至少10篇 这不就结了~
文献拉 不一定是论文,杂志啊 报纸啊 都可以的

按照存储与检索的对象为标准划分，信息检索包括文献检索、数据检索、事实检索

　　1
　　Accession number:20101212799005
　　Title:Ultra high throughput architectures for SHA-1 hash algorithm on FPGA
　　Authors:Jiang,Liehui1 ; Wang,Yuliang1 ; Zhao,Qiuxia1 ; Shao,Yi1 ; Zhao,Xiaoli1
　　Author affiliation:1 China National Digital Switching System Engineering and Technological R and D Center,450002 Zhengzhou,China
　　Corresponding author:Jiang,L.(wy15257@163.com)
　　Source title:Proceedings - 2009 International Conference on Computational Intelligence and Software Engineering,CiSE 2009
　　Abbreviated source title:Proc.- Int.Conf.Comput.Intell.Softw.Eng.,CiSE
　　Monograph title:Proceedings - 2009 International Conference on Computational Intelligence and Software Engineering,CiSE 2009
　　Issue date:2009
　　Publication year:2009
　　Article number:5363077
　　Language:English
　　ISBN-13:9781424445073
　　Document type:Conference article (CA)
　　Conference name:2009 International Conference on Computational Intelligence and Software Engineering,CiSE 2009
　　Conference date:December 11,2009 - December 13,2009
　　Conference location:Wuhan,China
　　2
　　0 records found in Compendex for:((Ultra high throughput Implementations for MD5 Hash Algorithm on FPGA) WN All fields),1969-2010

收藏推荐 一、“纸质资源”与“电子资源”兄弟相见如果读者在纸质期刊上,看到一篇文章,可以通过DOI到互联网上通过多种途径去检索从而直接得到获取该文章电子版的地址.二、从“二次文献”找到其“全文资源”的本尊基于DOI系统的解析机制又能保证从二次文献到全文的有效指引,使得读者既可以有更多的途径来获取二次文献,又可以准确获得链接全文资源的地址.例如在Elsevier公司的文摘引文数据库Scopus,检索到《解剖学报》的一篇文章,Scopus只收录该文章的二次文献,点击获取全文按钮,通过DOI的后台解析,可以直接链接到《解剖学报》全文独家合作的万方医学网获取该文章全文地址.

Accession number:x05x0520114514501868
Title:x05x05Effects of GFP transplastomic tobacco on soil enzyme activities
Authors:x05x05Guo,Changhong1 ; Liu,Qingguo1 ; Lv,Yueping1

Accession number:20103113111069
Title:The radiation attenuation and energy gain for crystalline undulator field
Authors:Zhang,Mei1 ; Luo,Xiao-Hua2,3 ; Luo,Shi-Yu1 ; Shao,Ming-Zhu1
Source title:Faguang Xuebao/Chinese Journal of Luminescence
Volume:31
Issue:3
Issue date:June 2010
Publication year:2010
Pages:454-458
Language:Chinese
ISSN:10007032
CODEN:FAXUEW
Document type:Journal article (JA)
Publisher:Chines Academy of Sciences,Southeast Lake Heading on 16th,Chungchun City,130033,China
Number of references:12
Main heading:Radiation
Controlled terms:Crystalline materials - Electrons - Equations of motion - Free electron lasers - Laser theory - Lasers - Projectiles - Wigglers
Uncontrolled terms:Attenuation lengths - Chaotic behaviour - Classical field theory - Crystal length - Dechanneling - Energy gain - Field radiation - Gain factors - Global bifurcations - Ionization loss - Non-Linearity - Particle motions - Radiation attenuation - Spectral distribution - Spontaneous radiation - Thermal oscillations - Undulator radiation - Undulators
Classification code:933.1 Crystalline Solids - 744.1 Lasers,General - 744.5 Free Electron Lasers - 921.2 Calculus - 931.1 Mechanics - 931.3 Atomic and Molecular Physics - 932.1.1 Particle Accelerators - 711 Electromagnetic Waves - 657.1 Solar Energy and Phenomena - 654 Rockets and Rocket Propulsion - 531.2 Metallography - 482.2 Minerals - 404.1 Military Engineering - 701.1 Electricity:Basic Concepts and Phenomena
Database:Compendex

Cassia twig to peony and adding Aconite Decoction ephedra Asarum

出版日期各种各样最近期引文第一,二次排序是期刊.
出版日期,没有一个月是设定为一月,多内（例如,10至12月）是一套以第一个月,和日期,没有一天是设定为第一个月的第一天.日期,这其中包括一个季节定为：冬季= 1月,春季为四月,夏= 7月和秋季=十月.
第一作者,最后作者和杂志排序从A到Z ;次要排序是出版日期

Ei检索：
Accession number:x05x0520105213529128
Title:x05x05Object tracking based on local feature points
Authors:x05x05Wang,Haili1 ; Zhang,Liang2
ISBN-13:x05x059781424465149
DOI:x05x0510.1109/CISP.2010.5648034
ISTP检索：
入藏号:11676085

网络信息检索方法可以归纳成目录检索、关键词检索、基于关键词模糊检索三种.

被SCI收录,检索信息如下：
Successful off-pump device closure of an isolated perimembraneous ventricular septal defect using a series of six occluders in a 5 kg infant via a minimally invasive approach
Context Sensitive Links

View full text from the publisher Context Sensitive Links Go to NCBI for additional information Go to Holdings
more options
Author(s): Wu Q (Wu, Qin)1, Xing QS (Xing, Quansheng)1, Chen ZY (Chen, Zuoyuan)2, Pan SL (Pan, Silin)1, Ren YY (Ren, Yueyi)1
Source: EUROPEAN HEART JOURNAL Volume: 31 Issue: 21 Pages: 2659-2659 Published: NOV 2010
Times Cited: 0 References: 0 Citation MapCitation Map
Document Type: Editorial Material
Language: English
Reprint Address: Xing, QS (reprint author), Qingdao Univ, Ctr Heart, Childrens Hosp, Qingdao 266011, Shandong Peoples R China
Addresses:
1. Qingdao Univ, Ctr Heart, Childrens Hosp, Qingdao 266011, Shandong Peoples R China
2. Qingdao Univ, Dept Cardiol, Teaching Hosp, Qingdao 266003, Shandong Peoples R China
E-mail Addresses: xingqs0532@163.com
Publisher: OXFORD UNIV PRESS, GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
IDS Number: 676QA
ISSN: 0195-668X
DOI: 10.1093/eurheartj/ehq262
UT ISI:000283926500020

oracle10g及其以上版本 会使用CBO选择,所以oracle会自动调整查询顺序根据效率.
你的问题要看哪个快,oracle就自动选顺序.不需要在意

解题思路：裸子植物与被子植物的主要区别就是种子外有无果皮包被着，据此作答．

裸子植物的胚珠外面无子房壁发育成果皮，种子裸露，仅仅被一鳞片覆盖起来，因此裸子植物只有种子，无果实．裸子植物也无花，只有孢子叶球，孢子叶球还不能看作真正的花，其形态结构上与被子植物的花是不同的，只是有些裸子植物的孢子叶球（球花）相当于被子植物的花的功能，因此裸子植物具有根、茎、叶、种子四种器官；而被子植物的种子外有果皮包被着，具有根茎叶花果实和种子六大器官．可见裸子植物区别于被子植物的主要特点是种子外无果皮包被．
A、只要是绿色植物都能进行光合作用，如绿色的藻类植物、裸子植物等，不符合题意．
B、白菜、萝卜的种子外有果皮包被着，属于被子植物，符合题意．
C、只要是绿色植物都能进行光合作用，自己制造有机物，都是自养，不符合题意．
D、蕨类植物、裸子植物、被子植物都有根、茎、叶的分化，不符合题意．
故选：B

点评：
本题考点： 被子植物的主要特征及经济意义；被子植物分类单位和分类方法．

考点点评： 解答此题的关键是掌握裸子植物和被子植物的主要特征以及区别．

Accession number:x05x0520113614295657
x05Title:x05x05Dynamic fault tree analysis approach to Safety Analysis of Civil Aircraft
x05Authors:x05x05Geng,Qichuan1 ; Duan,Haibin2,3 ; Li,Shuangtian1
x05Author affiliation:x05x05
1 x05School of Automation Science and Electrical Engineering,Beihang University,Beijing,100191,China
2 x05Provincial Key Laboratory for Information Processing Technology,Soochow University,Suzhou,215006,China
3 x05Science and Technology on Aircraft Control Laboratory,Beihang University,Beijing,100191,China

检索不到

你上12999数学网去看看有没

通配符“?”：只替代一个字符,例如：输入“Re?d”就可查找到“read”、”Reid”等.截词符“*”：在词干后面可加“*”,半角全角不区分,表示无限截词,可以查找到不同意义的字.如“micro”就可以找到“microscope”或“microcomputer”.位置算符运算“Nn”与“Wn”：表示2 个检索词之间的位置邻近有关系.N(near)算符表示检索词之间可以加入其它词,词的数量根据需要“n”值而定,词的顺序任意.而W(within)算符表示检索词之间可以加入其它词,词的数量根据需要“n”值而定,但词的顺序依输入词的顺序.

1.
This summer holiday,I made a good friend --- Robinson though ‘ROBINSON CRUSOE’. ‘ROBINSON CRUSOE’is a classical masterpiece which attracted me very much,and brought me much enlightenmet.I really lerned a lot of things from the eternal opus.
The ‘ROBINSON CRUSOE’have been authored by famouse English writer---Defoe. It’s about dramatis personae Robinson who met a frightful wind while he sailed on the sea. He was the only survinal, but he drifted to a uninhabited island. He bravely struggled, industriously worked and combated with barbarians. Robinson lived alone on the island for 28 years. He experienced many difficulties and dangers.
Robinson was a great person, he conquered countless and unimaginable hardships. If I stayed on a lonely island, I absolutely couldn’t vanquish dangers. I maybe would lose confidence for life. I respect Robinson very much, he is a real hero in my heart.
He lived on the island for about 30 years without any food, tool or habitation. He must depend by himself. Robinson wasn’t afraid of hardships, he had the fortitude spirit .He was brave in adventure and was good at labor. He used his head and hands to struggle all the time. I admire his courge very much, because these were not easy, work at all.
In fact, we also need the spirit of being undefeatalle indefatigable
Like Robinson. If we believe in ourselves, never give up and do we best, we must be successful!
Robinson was a great miracle, he achieved mumerous. ‘impossible things’. ‘Robinson Crusoe’ was an immortal novel, because it gave us a courageous, intrepidity, diligent, indefatigable and wise ordinany person, a vanquish nature, a hero who exploited nature. The book is a really excellent adventuresome novel,
There is no perfect life in the world, but we can change our fate. If we have confidences and work hard, we absolute will be victorious, and the most important thing is ‘Never give up’!
2.
Robinson Crusoe, the narrator of the story, tells us that he was born in 1632 in the city of York, England. His father, a German immigrant, married a woman whose name was Robinson, and his real name was Robinson Kreutznaer, but due to the natural corruption of languages, the family now writes their name "Crusoe." He was the third son; his oldest brother was killed in a war, and the next son simply disappeared.
When Robinson Crusoe first had an urge to go to sea, his father lectured him upon the importance of staying home and being content with his "middle station" in life. His father maintained that the "middle station had the fewest disasters and was not exposed to so many vicissitudes as the higher or lower part of mankind." After his father expressly forbade him to go to sea, and, furthermore, promised to do good things for him if he stayed home, for another whole year, Robinson Crusoe stayed at home, but he constantly thought of adventures upon the high sea. He tried to enlist the aid of his mother, pointing out that he was now eighteen years old and if he did not like the sea, he could work diligently and make up for the time he might lose while at sea. She refused to help him, even though she did report his strong feelings to her husband.
When Robinson was nineteen, on the first of September, in 1651, he joined a friend on a ship bound for London, without consulting either his father or mother. Almost immediately, "the wind began to blow, and the sea to rise in a most frightful manner." Robinson Crusoe, who had never been to sea before, saw this as a sign that he was justly "overtaken by the judgement of Heaven" for his wicked leaving of his father's house without letting anyone know. He was so frightened that he made the promise: "If it would please God here to spare my life in this one voyage, if ever I got once my foot upon dry land again, I would go directly home to my father, and never set it into a ship again while I lived." The wind soon abated, and the next morning the sea was so calm and so beautiful that he entirely forgot the vows and promises that he had made in his distress, and joined the other sailors in a drinking bout.
As they neared a place called Yarmouth Roads, the winds ceased to blow and thus they were stilled for eight days, and when the winds did begin to blow, the ship immediately encountered a storm much more violent than the earlier one. Even the most experienced sailors were down on their knees praying. The storm continued with such fury that the seamen acknowledged that they had never known a worse one.
When the boat sprung a leak, Robinson was ordered below to help pump the water. It soon became apparent that they would not be able to save the ship and the captain fired several volleys of distress signals. A lighter ship in the vicinity made it up to their ship and was able to take the crew away from the sinking ship, which foundered soon after they left.
The crew finally got to shore, where Robinson Crusoe met his friend's father, who owned the ship. When the captain heard Robinson Crusoe's story, he felt strongly that it was the "hand of Providence" instructing Robinson Crusoe never to go to sea any more. He told the young man: "You ought to take this for a plain and visible token that you are not to be a seafaring man." He even wondered if he had done something wrong that such a person as Robinson Crusoe should "come onto his ship," and he warned Crusoe again that "you will meet with nothing but disasters and disappointments" if he did not go back to his father's house.
鲁滨孙出身于一个体面的商人家庭,渴望航海,一心想去海外见识一番.他瞒着父亲出海,第一次航行就遇到大风浪,船只沉没,他好不容易才逃出性命.第二次出海到非洲经商,赚了一笔钱.第三次又遭不幸,被摩尔人俘获,当了奴隶.后来他划了主人的小船逃跑,途中被一艘葡萄牙货船救起.船到巴西后,他在那里买下一个庄园,做了庄园主.他不甘心于这样的发财致富,又再次出海,到非洲贩卖奴隶.
船在途中遇到风暴触礁,船上水手、乘客全部遇难,唯有鲁滨孙幸存,只身飘流到一个杳无人烟的孤岛上.他用沉船的桅杆做了木筏,一次又一次地把船上的食物、衣服、枪支弹药、工具等运到岸上,并在小山边搭起帐篷定居下来.接着他用削尖的木桩在帐篷周围围上栅栏,在帐篷后挖洞居住.他用简单的工具制作桌、椅等家具,猎野味为食,饮溪里的水,度过了最初遇到的困难.
他开始在岛上种植大麦和稻子,自制木臼、木杵、筛子,加工面粉,烘出了粗糙的面包.他捕捉并驯养野山羊,让其繁殖.他还制作陶器等等,保证了自己的生活需要.虽然这样,鲁滨孙一直没有放弃寻找离开孤岛的办法.他砍倒一棵大树,花了五六个月的时间做成了一只独木舟,但船实在太重,无法拖下海去,只好前功尽弃,重新另造一只小的.
鲁滨孙在岛上独自生活了17年后,一天,他发现岛边海岸上都是人骨,生过火,原来外岛的一群野人曾在这里举行过人肉宴.鲁滨孙惊愕万分.此后他便一直保持警惕,更加留心周围的事物.直到第24年,岛上又来了一群野人,带着准备杀死、吃掉的俘虏.
鲁滨孙发现后,救出了其中的一个.鲁滨孙把被救的土人取名为“星期五”.此后, “星期五”成了鲁滨孙忠实的仆人和朋友.接着,鲁滨孙带着“星期五”救出了一个西 班牙人和“星期五”的父亲.不久有条英国船在岛附近停泊,船上水手闹事,把船长等 三人抛弃在岛上,鲁滨孙与“星期五”帮助船长制服了那帮水手,夺回了船只.他把那 帮水手留在岛上,自己带着“星期五”和船长等离开荒岛回到英国.此时鲁滨孙已离家 35年.他在英国结了婚,生了三个孩子.妻子死后,鲁滨孙又一次出海经商,路经他住 过的荒岛,这时留在岛上的水手和西班牙人都已安家繁衍生息.鲁滨孙又送去新的移民, 将岛上的土地分给他们,并留给他们各种日用必需品,满意地离开了小岛.

也是那个变态老师!杯具,怎么会想到1905的!

EI检索号为
Accession number: 20105213515117

Title: Digital reconstruction on geographical environment of Neolithic human activities in the Lingjiatan site of Chaohu City, East China

Authors: Wang, Xinyuan1, 2, 3 ; Zhang, Jie2, 3 ; Wu, Li2, 3 ; Zhou, Kunshu4 ; Mo, Duowen5

1．关系数据库的任何检索操作都是三种基本运算的组合,这三种基本运算不包括( B )
A） 联接 B） 比较 C） 选择 D）投影
2．“项目管理器”的“文档”选项卡用于显示和管理( D)
A） 表单、报表和和查询 B） 数据库、表单和报表
C） 查询、报表和视图 D）表单、报表和标签
3.在Visual FoxPro中,表结构中的逻辑型、通用型、日期型字段的宽度由系统自动给出,它们分别为( A )
A）1,4,8 B）4,4,10
C）l,10,8 D、2,8,8
4.在程序中不需要使用public等命令明确声明和建立,可直接使用的内存变
量是 ( A )
A）局部变量 B）公共变量 C）私有变量 D）全局变量
5．下列属于非容器类控件的是 A
A）Text B）Form C）Page D）Container
6．若使“文本框”控件中输入的内容在运行时显示为“*”号,需修改文本框的 D 属性
A）Text B）Name C）Value D）PasswordChar
7．要为当前表所有职工增加100元工资,应该使用命令 D
A）CHANGE工资 WITH 工资十100
B）REPLACE工资WITH工资十100
C）CHANGE ALL工资WITH工资＋100
D）REPLACE ALL工资WITH工资＋100
8．SQL语句中条件短语的关键字是 A
A）WHERE B） FOR
C）WHILE D） CONDITION
9．以下关于查询的描述正确的是 D
A）不能根据自由表建立查询 B）只能根据自由表建立查询
C）只能根据数据库表建立查询 D）可以根据数据库表和自由表建立查询
10.VFP中支持两种类型的菜单,分别是 C
A)条形菜单和弹出式菜单 B)条形菜单和下拉式菜单
C)弹 出式菜单和下拉式菜单 D)复杂菜单和简单菜单
二、填空题（每空3分,共30分）
1．在Visual FoxPro的表之间建立—对多联系是把( 主表 )的主关键字字段添加到的（相关 ）表中.
2．项目文件的扩展名是( .PJX ).
3．命令?ROUND（337.2007,3）的执行结果是( 337.201 ).
4．在定义字段有效性规则时,在规则框中输入的表达式类型是 逻辑型.
5．数据库表之间的一对多联系通过主表的 ( 主 )索引和子表的 ( 普通 )索引实现.
6．数据环境是表单的数据来源,它可以包括与表单有联系的__视图________、__自由表______或是__数据库表__________.
7．在SQL语句中空值用 ( null ) 表示
三、简答题（每题10分,共40分）
1.简述VF开发应用程序的过程
先创建表及相关数据文件,然后创建程序,最后使用项目管理器连编形成EXE文件
2.叙述下列各命令的功能：
GO BOTTOM 图 指针指向最后一条记录
MODIFY STRUCTURE 打开表设计器,修改表结构
3.简述什么是类?类和对象的区别和联系?
类是对一类相似对象的性质描述.
任何一个对象都是某一个类的实例.

1、位置检索也叫临近检索.文献记录中词语的相对次序或位置不同,所表达的意思可能不同,而同样一个检索表达式中词语的相对次序不同,其表达的检索意图也不一样.布尔逻辑运算符有时难以表达某些检索课题确切的提问要求.字段限制检索虽能使检索结果在一定程度上进一步满足提问要求,但无法对检索词之间的相对位置进行限制.位置算符检索是用一些特定的算符（位置算符）来表达检索词与检索词之间的临近关系,并且可以不依赖主题词表而直接使用自由词进行检索的技术方法.
2、 类书按其内容和编排方式不同,有义系、形系、音系三类.义系类书就是按材料的义类分部编排,如天文、地理、人事类.每系中又分若干小类,如天文分有日、月、星、时等；时又分春、夏、秋、冬等.古代类书大多属此类.其中以取材范围分,有综合性和专科性两种.
类书是辑录各种书籍中的有关资料,分门别类编排而成的工具书,具有百科全书的性质.古代的类书编排方法不很科学,有用分韵、分字等方法编排的.但是此类书很有用处,如可以根据所辑资料查找古代社会事物的原委、典章制度的沿革、文字掌故的兴废,或可用以校补古籍.
书最初是供封建帝王了解治国策略、士子应付科举之用.随着时间的流逝,类书原来的意义越来越淡漠,在保存文献等方面的作用越来越明显.用现在的眼光来看,类书的作用主要有二：　　（1）保存资料　类书在编纂过程中,大多直接采录原始文献.由于兵火水灾等因素,一些图书因此失传.由于类书中保存了有关资料,通过辑录佚文,往往能再现图书内容.如《太平广记》中引用古书达500多种,多数已失传,许多珍贵资料正是由于《太平广记》的引用而得以保存.由于在流传和翻刻中容易形成讹误,利用类书中保留的原始文献,也有助于校勘异文.如鲁迅曾用《艺文类聚》、《初学记》等类书校勘《稽康集》.　　（2）查考资料　类书按类编排,非常方便查考有关资料.如《太平广记》、《文苑英华》等类书中收录了历代的小说、诗文作品,有助于查找文学方面的资料.《古今图书集成》等综合性类书汇集各专题方面的资料,类似于百科辞典,从中可查找到事物起源、诗文典故、诗词文句、名物制度等资料.近年来新编的一些类书,汇集古今书籍中的资料,同样方便读者查找.

2、 分类法在检索中的利用优势?分类法的优势是比主题法有更大的容量,内容更有针对性、更具学术性、符合研究人员的要求.在进行文献检索时可以很方便地检索到某一学科的相关文献. 4、何谓检索语言?简述分类语言与主题语言各自的优缺点?检索语言,又称为标引语言、索引语言、文献检索语言、信息存贮与检索语言等.检索语言是应文献信息的加工、存储和检索的共同需要而发展起来的专门语言,它是表达概括文献信息内容和检索课题内容的概念及其相互关系的一种概念标识系统.文献信息检索人员使用检索语言表达检索课题,检索语言在文献信息、文献信息标引人员和信息用户之间起桥梁的作用,它有助于准确、全面、迅速地从检索系统中获得所需要的文献信息.分类语言的优点是便于人们按学科和专业系统地进行文献检索,查全率较高,便于组织图书资料的排架等.分类语言的缺点是检索者必须了解课题的相关学科体系,方能顺利地找到相关类目,否则,易产生误差,造成误检；分类表的结构是固定的,不便于随时修订和增设新的类目,难以及时反映新兴学科及边缘学科的内容.主题语言具有直观、专指性好、使用灵活、适合计算机检索等优点,是文献处理中的主要标引方法.主题语言的缺点是正确反映文献内容很大程度上取决于标引人员的水平、能力和认真程度.而且容易将学科体系分散.总之分类语言和主题语言的优点和互补.5、检索算符一般有哪几种?说明它们各自的使用方法?检索算符包括（1）布尔算符（2）截词检索符 （3）限制检索符（4）位置逻辑检索符（5）加权检索关于他们的用法参考： http://zhidao.baidu.com/question/127021448.html6、指示性工具书和参考工具书的相同点和不同点?指示性工具书也叫做检索性工具书.检索工具书和参考工具书既有区别,又有共同之处.区别在于检索工具书只是用来进行文献检索,提供给读者的是一条条有关的文献线索,人们还要根据这些线索才能找到原文,而参考工具书可以提供给读者的是具体的数据和事实.共同之处在于它们的内容都是高度浓缩的,正文和索引按一定的顺序进行编排,都是用于查寻而不是系统阅读的. 论述题有图,所以请打开： http://wendang.baidu.com/view/64e13169a45177232f60a2cf.html下载1、举例说明查找相关文献的过程,要求必须有具体的例子,而且要和专业相关?文献的检索步骤是：1.>．分析检索课题,明确检索要求2．>选择检索工具,确定检索方法3．>选择检索途径,确定检索标识4．>具体查找文献线索；5．>索取原始文献.下面我们来查找与信息检索课题相关的文献.步骤一：明确检索课题的主题是信息检索,并确定检索词“信息检索”或者“文献检索”步骤二：我们选择读秀学术搜索,并确定检索方法为常规法.步骤三：确定检索途径为主题途径,并选择文献类型为图书,检索标识为“信息检索”.步骤四：查找文献步骤五：获取文献 2、数据库中的主题检索与我们常用的关键词检索在本质上有什么不同,请通过某一个数据库来进行说明? 我们在文献检索时,通常都是使用关键词进行检索.这种关键词是未经规范化的自然语言语词,这种关键词由于受限制比较小,所以检索比较灵活,检索范围比较广.而在数据库中的主题检索所使用的主题词则是规范化了的自然语言语词,在进行文献检索时,检索到的文献往往比较准确,但是检索范围受到限制.数据库中的主题检索与我们常用的关键词检索在本质的区别在于规范化与不规范化.但是在一定程度上,未经规范化的自然语言语词可以转化为规范化了的自然语言语词.

常用的检索中文图书的数据库：图书管理系统,

说实在的,你这个不是一点两点能给你列清楚地.还有你给的分太少,高手也不愿意答.给你简单的说明一下吧.

有无鞘翅（有——鞘翅目） 前翅是否为半鞘翅（有——半翅目 ） 口器虹吸,翅膀上是否有鳞片（有——鳞翅目） 触角棒状羽状（棒状——蝶科 羽状——蛾科） 前翅质地均一膜翅或革质（刺吸式口器——同翅目；咀嚼式口器,后足跳跃式——直翅目） 前后翅均为膜质（是——同翅目,后翅平衡棒——双翅目）

后边具体划分你自己弄吧