关于外文(数据库)信息检索（2）的检索报告
1106班 学号2011100629 姓名丁颖
摘要：熟悉google scholar的基本情况；掌握其检索方法、提高查全率和查准率的方法。
以及通过与实验9比较，自己总结两种检索的优劣势。我将通信技术领域的技术词汇：模拟信号，数字信号作为检索项。没有出现什么问题。
关键词：通信技术，模拟信号，数字信号
About foreign language (database) information
retrieval (2) search report
Name DingYing in class 1106( Student ID 2011100629)
Abstract:Google scholar familiar with the basic situation; grasp the retrieval methods to
improve the recall and precision of the method. And compared with the experimental nine, he summed up the advantages and disadvantages of the two searches. I'll communications technology technical terms: analog signals, digital signals as a search term. Without any problems.. Keyword: communication technology, analog signals, digital signals
一、 课题分析
熟悉google scholar 的基本情况；掌握其检索方法、提高查全率和查准率的方法。以及通过与实验9比较，自己总结两种检索的优劣势。 1、查阅google scholar的检索方式及其检索流程。 2、选择同实验9一致的检索项。尝试两种检索方法： （1）首页简单检索 （2）高级检索
（http://scholar.google.com.hk/intl/zh-CN/scholar/refinesearch.html#tips
每种方法列出检索结果数，同时列出5—10条检索命中记录的题录信息（题名、作者、文献出处）。 最后比较这两种方法（就其方法难易程度、准确程度等）。
3、在2的基础上，选择一个你所感兴趣的作者，重新检索（采用两种方法并比较）。
4、在2的基础上与上一次在ACM Digital Library实验比较。
二、数据库或检索工具的选择
进入http://scholar.google.com.hk/schhp?hl=zh-CN，然后在中用以上方法对analog signals和 digital signals 进行检索。
三、检索方法与检索步骤
1、进入http://scholar.google.com.hk/schhp?hl=zh-CN，则进入首页，并在中检索。
图1 首页
2、在首页点高级检索进入
图2 高级检索页面
3、在高级检索页面中对analog signals和 digital signals进行“与、或”检索，
四、检索结果
1.在首页检索
图 3首页-analog signals
相关文献：
1.From theory to practice: Sub-Nyquist sampling of sparse wideband analog signals M Mishali, YC Eldar - … in Signal Processing, IEEE Journal of, 2010 - ieeexplore.ieee.org
2.Blind multiband signal reconstruction: Compressed sensing for analog signals
M Mishali, YC Eldar - Signal Processing, IEEE Transactions on, 2009 - ieeexplore.ieee.org
3.Apparatus and method for encoding and decoding information in analog signals J Wolosewicz, K Jemili - US Patent 5,828,325, 1998 - Google Patents 4.Spoken language processing
X Huang, A Acero, HW Hon - 2001 - library.wisc.edu 5.Analog and digital signal processing H Baher - 1990 - dl.acm.org
图4 首页-digital signals
相关文献：
1.Transmission of digital signals by chaotic synchronization
U Parlitz, LO Chua, L Kocarev, KS Halle… - International Journal of …, 1992 - World Scientific
2.[图书] Modern Digital and Analog Communication Systems 3e Osece BP Lathi - 1998 - dl.acm.org
3.Time-frequency representation of digital signals and systems based on short-time Fourier analysis
M Portnoff - Acoustics, Speech and Signal Processing, IEEE …, 1980 - ieeexplore.ieee.org
4.Interpolation and decimation of digital signals—A tutorial review
RE Crochiere, LR Rabiner - Proceedings of the IEEE, 1981 - ieeexplore.ieee.org 5.Blind estimation of multiple co-channel digital signals using an antenna array
S Talwar, M Viberg, A Paulraj - Signal Processing Letters, IEEE, 1994 - ieeexplore.ieee.org 2.在高级检索中检索
图5 高级检索
相关文献：
1. Modern Digital and Analog Communication Systems 3e Osece BP Lathi - 1998 - dl.acm.org
2.Transmission of digital signals by chaotic synchronization
U Parlitz, LO Chua, L Kocarev, KS Halle… - International Journal of …, 1992 - World Scientific
3.Broadcast receiver adapted for analog and digital signals W Boie - EP Patent 0,696,854, 1996 - freepatentsonline.com
4.Method and apparatus converting digital signals to analog signals and
simultaneous transmission of AC power and signals over wire conductors G Howard - US Patent 5,065,133, 1991 - Google Patents
5.Apparatus and method for encoding and decoding information in analog signals
J Wolosewicz, K Jemili - US Patent 5,828,325, 1998 - Google Patents 3.检索作者
图6：首页检索作者
相关文献：
1.General approach for chaotic synchronization with applications to communication
L Kocarev, U Parlitz - Physical Review Letters, 1995 - APS
2.Generalized synchronization, predictability, and equivalence of unidirectionally coupled dynamical systems
L Kocarev, U Parlitz - Physical Review Letters, 1996 - APS
3.Experimental demonstration of secure communications via chaotic synchronization
L Kocarev, KS Halle, K Eckert, LO Chua… - International Journal of …, 1992 - World Scientific
4.Transmission of digital signals by chaotic synchronization
U Parlitz, LO Chua, L Kocarev, KS Halle… - International Journal of …, 1992 - World Scientific
5.Chaos-based cryptography: a brief overview
L Kocarev - Circuits and Systems Magazine, IEEE, 2001 - ieeexplore.ieee.org
图7：高级检索作者
相关文献：
1.General approach for chaotic synchronization with applications to communication
L Kocarev, U Parlitz - Physical Review Letters, 1995 - APS
2.Generalized synchronization, predictability, and equivalence of unidirectionally coupled dynamical systems
L Kocarev, U Parlitz - Physical Review Letters, 1996 - APS
3.Experimental demonstration of secure communications via chaotic synchronization
L Kocarev, KS Halle, K Eckert, LO Chua… - International Journal of …, 1992 - World Scientific
4.Transmission of digital signals by chaotic synchronization
U Parlitz, LO Chua, L Kocarev, KS Halle… - International Journal of …, 1992 - World Scientific
5.Chaos-based cryptography: a brief overview
L Kocarev - Circuits and Systems Magazine, IEEE, 2001 - ieeexplore.ieee.org
五、检索方法的比较
在首页检索时，没有检索范围，所以检索结果多；在高级检索中可以进行筛选，选择其出现的位置及作者、日期、期刊等，所以检索结果相对较少，较准确。 但是在google scholar 中检索时没有或、与选项，这是与实验九ACM Digital Library的不同。
六、存在问题或下一步工作设想
此次实验虽然检索项目多，但没有什么问题。
参考文献：
[1]http://scholar.google.com.hk/scholar?q=digital+signals&btnG=&hl=zh-CN&as_sdt=0%2C5
[2]http://scholar.google.com.hk/scholar?as_q=analog+signals++digital+signals&as_epq=&as_oq=&as_eq=&as_occt=any&as_sauthors=&as_publication=&as_ylo=&as_yhi=&btnG=&hl=zh-CN&as_sdt=0%2C5#
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