On the retrieval efficiency of light storage in an EIT medium

2016 ◽  
Vol 69 (4) ◽  
pp. 488-504 ◽  
Author(s):  
Young-Tak Chough
Keyword(s):  
Light Storage ◽  
Retrieval Efficiency

scholarly journals All-optical light storage in bound states in the continuum and release by demand

2015 ◽  
Vol 23 (17) ◽  
pp. 22520 ◽  
Author(s):  
E. N. Bulgakov ◽  
K. N. Pichugin ◽  
A. F. Sadreev
Keyword(s):  
Bound States ◽  
Light Storage ◽  
All Optical ◽  
The Continuum

An Analysis Method of Semantic Relevancy on Controlled Tag

2012 ◽  
Vol 263-266 ◽  
pp. 1588-1592
Author(s):  
Jiu Qing Li ◽  
Chi Zhang ◽  
Peng Zhou Zhang
Keyword(s):  
Semantic Similarity ◽  
Calculation Method ◽  
Domain Ontology ◽  
Analysis Method ◽  
Semantic Correlation ◽  
Retrieval Efficiency ◽  
Similarity Calculation

To solve resource-tagging inefficiency and low-precision retrieval in special field, an analysis method of tag semantic relevancy based on controlled database was proposed. The characteristic of special field and building method for controlled database were discussed. Domain ontology correlation calculation method was used to get semantic correlation. The tag semantic similarity calculation method was developed for semantic similarity, and normalization was used to increase the similarity accuracy. With semantic correlation and similarity as parameters, the semantic relevancy in special field can be obtained. This method was used successfully in the special field of actual projects, improved resource-tagging and retrieval efficiency.

scholarly journals Application of the Variety-Generator Approach to Searches of Personal Names in Bibliographic Data Bases--Part 2. Optimization of Key-Sets, and Evaluation of Their Retrieval Efficiency

1974 ◽  
Vol 7 (3) ◽  
pp. 201
Author(s):  
Dirk W. Fokker ◽  
Michael F. Lynch
Keyword(s):  
Information Systems ◽  
Data Base ◽  
Variable Length ◽  
Data Bases ◽  
Personal Names ◽  
Fixed Length ◽  
Bibliographic Data ◽  
Retrieval Efficiency ◽  
Types Of Information ◽  
High Degree

<p class="p1">Keys consisting of variable-length chamcter strings from the front and rear of surnames, derived by analysis of author names in a particular data base, am used to provide approximate representations of author names. When combined in appropriate ratios, and used together with keys for each of the first two initials of personal names, they provide a high degree of discrimination in search.</p> <p class="p1">Methods for optimization of key-sets are described, and the performance of key-sets varying in size between <span class="s1">150 </span>and <span class="s1">300 </span>is determined at file sizes of up to <span class="s1">50,000 </span>name entries. The effects of varying the proportions of the queries present in the file are also examined. The results obtained with fixed-length keys are compared with those for variable-length keys, showing the latter to be greatly superior.</p> <p class="p1">Implications of the work for a variety of types of information systems are discussed.</p>

A dynamic memory of software designs

1994 ◽  
Vol 8 (2) ◽  
pp. 163-176 ◽  
Author(s):  
Scott Henderson ◽  
Sidney C. Bailin
Keyword(s):  
Artificial Intelligence ◽  
Software Engineering ◽  
Software Reuse ◽  
Concept Formation ◽  
Experimental System ◽  
Dynamic Memory ◽  
Software Artifacts ◽  
Retrieval Efficiency ◽  
Conceptual Hierarchy ◽  
Support Software

AbstractThis paper describes an application of artificial intelligence to support software reuse. We begin by discussing the characteristics of software engineering that establish dynamic reorganization as a requirement for a repository of software artifacts. We then present an experimental system that uses incremental concept formation as the basis for dynamic reorganization, and the conceptual hierarchy that was generated by the system for a set of 67 artifacts. The hierarchy is compared to a hierarchy produced manually by independent investigators, and the automatic hierarchy is evaluated in terms of retrieval efficiency and retrieval reliability. The paper ends with a discussion of three projects that share similar objectives with our work.

scholarly journals Quasi-Light-Storage based on time-frequency coherence

2009 ◽  
Vol 17 (18) ◽  
pp. 15790 ◽  
Author(s):  
Stefan Preußler ◽  
Kambiz Jamshidi ◽  
Andrzej Wiatrek ◽  
Ronny Henker ◽  
Christian-Alexander Bunge ◽  
...  
Keyword(s):  
Light Storage ◽  
Time Frequency ◽  
Frequency Coherence

scholarly journals Tropical tropospheric ozone derived using Clear-Cloudy Pairs (CCP) of TOMS measurements

2003 ◽  
Vol 3 (1) ◽  
pp. 225-252 ◽  
Author(s):  
M. J. Newchurch ◽  
D. Sun ◽  
J. H. Kim ◽  
X. Liu
Keyword(s):  
High Altitude ◽  
Tropospheric Ozone ◽  
Total Ozone ◽  
Stratospheric Ozone ◽  
Lower Troposphere ◽  
Total Ozone Mapping Spectrometer ◽  
Significant Difference ◽  
Retrieval Efficiency ◽  
Retrieval Errors ◽  
Low Altitude

Abstract. Using TOMS total-ozone measurements over high-altitude cloud locations and nearby paired clear locations, we describe the Clear-Cloudy Pairs (CCP) method for deriving tropical tropospheric ozone. The high-altitude clouds are identified by measured 380 nm reflectivities greater than 80% and Temperature Humidity InfraRed (THIR) measured cloud-top pressures less than 200 hPa. To account for locations without high-altitude clouds, we apply a zonal sine fitting to the stratospheric ozone derived from available cloudy points, resulting in a wave-one amplitude of about 4 DU. THIR data is unavailable after November 1984, so we extend the CCP method by using a reflectivity threshold of 90% to identify high-altitude clouds and remove the influence of high-reflectivity-but-low-altitude clouds with a lowpass frequency filter. We correct ozone retrieval errors associated with clouds, and ozone retrieval errors due to sun glint and aerosols. Comparing CCP results with Southern Hemisphere ADditional OZonesondes (SHADOZ) tropospheric ozone indicates that CCP tropospheric ozone and ozonesonde measurements are highly consistent. The most significant difference between CCP and ozonesonde tropospheric ozone can be explained by the low Total Ozone Mapping Spectrometer (TOMS) retrieval efficiency of ozone in the lower troposphere.

The Influence of Read Field Intensity on The Retrieval Efficiency and Entanglement Quality of Atom-Photon Entanglement Source

2018 ◽  
Vol 24 (3) ◽  
pp. 303-308
Author(s):  
张常睿 ZHANG Chang-rui ◽  
王圣智 WANG Sheng-zhi ◽  
徐忠孝 XU Zhong-xiao ◽  
李淑静 LI Shu-jing ◽  
王海 WANG Hai
Keyword(s):  
Field Intensity ◽  
Retrieval Efficiency
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