U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject "information retrieval" Remove constraint Subject: "information retrieval"
Start Over

Search

274  Search Results

« Previous | 1 - 20 of 274 |
Number of results to display per page

Search Results

1. Selecting Post-Processing Schemes for Accurate Detection of Small Objects in Low-Resolution Wide-Area Aerial Imagery

Author:
Xin Gao; Sundaresh Ram; Rohit C. Philip; Jeffrey J. Rodríguez; Jeno Szep; Sicong Shao; Pratik Satam; Jesús Pacheco; Salim Hariri
Source:
Remote Sensing 2022 v.14 no.2 pp. -
ISSN:
2072-4292
Subject:
information retrieval,   etc   ; algorithms; data collection; neural networks; remote sensing;     Show all 5 Subjects
Abstract:
... In low-resolution wide-area aerial imagery, object detection algorithms are categorized as feature extraction and machine learning approaches, where the former often requires a post-processing scheme to reduce false detections and the latter demands multi-stage learning followed by post-processing. In this paper, we present an approach on how to select post-processing schemes for aerial object det ...
DOI:
10.3390/rs14020255

2. Deep Descriptor Learning with Auxiliary Classification Loss for Retrieving Images of Silk Fabrics in the Context of Preserving European Silk Heritage

Author:
Mareike Dorozynski; Franz Rottensteiner
Source:
ISPRS international journal of geo-information 2022 v.11 no.2 pp. -
ISSN:
2220-9964
Subject:
information retrieval,   etc   ; data collection; databases; neural networks; silk; spatial data;     Show all 6 Subjects
Abstract:
... With the growing number of digitally available collections consisting of images depicting relevant objects from the past in relation with descriptive annotations, the need for suitable information retrieval techniques is becoming increasingly important to support historians in their work. In this context, we address the problem of image retrieval for searching records in a database of silk fabrics ...
DOI:
10.3390/ijgi11020082

3. Cluster Nested Loop k-Farthest Neighbor Join Algorithm for Spatial Networks

Author:
Hyung-Ju Cho
Source:
ISPRS international journal of geo-information 2022 v.11 no.2 pp. -
ISSN:
2220-9964
Subject:
information retrieval,   etc   ; algorithms; artificial intelligence; empirical research; geometry; spatial data;     Show all 6 Subjects
Abstract:
... This paper considers k-farthest neighbor (kFN) join queries in spatial networks where the distance between two points is the length of the shortest path connecting them. Given a positive integer k, a set of query points Q, and a set of data points P, the kFN join query retrieves the k data points farthest from each query point in Q. There are many real-life applications using kFN join queries, inc ...
DOI:
10.3390/ijgi11020123

4. Underground Ecosystem Conservation Through High-resolution Air Monitoring

Author:
Rosangela Addesso; Alessandro Bellino; Daniela Baldantoni
Source:
Environmental management 2022 v.69 no.5 pp. 982-993
ISSN:
0364-152X
Subject:
information retrieval,   etc   ; air; carbon dioxide; ecosystems; environmental management; particulates; relative humidity; temperature; time series analysis; tourism; wavelet; Italy;     Show all 12 Subjects
Abstract:
... In cave ecosystems tourists represent moving sources of discontinuous disturbances, able to induce transient system responses whose knowledge is crucial in defining appropriate conservation measures. Here we propose an approach to evaluate the amplitude and scales of cave alterations based on high-resolution air monitoring, through the use of purposely developed low-cost monitoring stations and a ...
DOI:
10.1007/s00267-022-01603-0

5. A Review of IRS-1C Applications in Urban and Regional Studies, and Infrastructure Planning

Author:
Pramod Kumar; K. Venugopala Rao; Sudha Ravindranath; Sandeep Maithani; Asfa Siddiqui; B. D. Bharath; S. V. L. Bhavani
Source:
Journal of the Indian Society of Remote Sensing 2021 v.49 no.1 pp. 161-177
ISSN:
0255-660X
Subject:
information retrieval,   etc   ; digital images; infrastructure; land use; satellites; surveys;     Show all 6 Subjects
Abstract:
... The multifaceted data from Indian remote sensing satellite (IRS)-1C with Panchromatic (PAN, 5.8 m, 0.50–0.75 μm), Linear Imaging Self-Scanning Sensor-III (LISS-III, 23.5 m, four multi-spectral bands) and Wide Field Sensor (WiFS, 188 m, red and near-infrared bands) sensors onboard, along with stereo imaging and 5-day revisit capability have been effectively utilised for mapping, monitoring, plannin ...
DOI:
10.1007/s12524-020-01283-5

6. O47 Chat with Maya: Assessing the Usability of the Texas WIC Chatbot

Author:
Colton Scott; Victoria Padilla; Brittany Markides; Lesli Biediger-Friedman; Sylvia Crixell
Source:
Journal of nutrition education and behavior 2021 v.53 no.7 pp. S22
ISSN:
1499-4046
Subject:
information retrieval,   etc   ; automation; behavior; cognition; computer software; nutrition education; Texas;     Show all 7 Subjects
Abstract:
... To address declining participation rates in the Women, Infants, and Children (WIC) program, Texas WIC developed and deployed Maya, the Texas WIC chatbot, in June 2020. Maya is an automated software application that allows visitors of TexasWIC.org to ask questions about eligibility and begin the process of making an appointment. Maya has been developed within a user-centered design framework, with ...
DOI:
10.1016/j.jneb.2021.04.056

7. Approaches for the Clustering of Geographic Metadata and the Automatic Detection of Quasi-Spatial Dataset Series

Author:
Javier Lacasta; Francisco Javier Lopez-Pellicer; Javier Zarazaga-Soria; Rubén Béjar; Javier Nogueras-Iso
Source:
ISPRS international journal of geo-information 2022 v.11 no.2 pp. -
ISSN:
2220-9964
Subject:
information retrieval,   etc   ; automatic detection; data collection; gloves; metadata; spatial data;     Show all 6 Subjects
Abstract:
... The discrete representation of resources in geospatial catalogues affects their information retrieval performance. The performance could be improved by using automatically generated clusters of related resources, which we name quasi-spatial dataset series. This work evaluates whether a clustering process can create quasi-spatial dataset series using only textual information from metadata elements. ...
DOI:
10.3390/ijgi11020087

8. Expression of glucose transporters in human neurodegenerative diseases

Author:
Kinga Głuchowska; Monika Pliszka; Leszek Szablewski
Source:
Biochemical and biophysical research communications 2021 v.540 pp. 8-15
ISSN:
0006-291X
Subject:
information retrieval,   etc   ; brain; energy; glucose; humans; protein sweeteners; research; symporters; therapeutics;     Show all 9 Subjects
Abstract:
... The central nervous system (CNS) plays an important role in the human body. It is involved in the receive, store and participation in information retrieval. It can use several substrates as a source of energy, however, the main source of energy is glucose. Cells of the central nervous system need a continuous supply of energy, therefore, transport of glucose into these cells is very important. The ...
DOI:
10.1016/j.bbrc.2020.12.067

9. Human-annotated dataset for social media sentiment analysis for Albanian language

Author:
Fatbardh Kadriu; Doruntina Murtezaj; Fatbardh Gashi; Lule Ahmedi; Arianit Kurti; Zenun Kastrati
Source:
Data in Brief 2022 v.43 pp. 108436
ISSN:
2352-3409
Subject:
information retrieval,   etc   ; COVID-19 infection; data collection; people; public health; Kosovo;     Show all 6 Subjects
Abstract:
... Social media was a heavily used platform by people in different countries to express their opinions about different crises, especially during the Covid-19 pandemics. This dataset is created through collecting people's comments in the news items on the official Facebook site of the National Institute of Public Health of Kosovo. The dataset contains a total of 10,132 comments that are human-annotate ...
DOI:
10.1016/j.dib.2022.108436

10. Comprehensive LiDAR simulation with efficient physically-based DART-Lux model (I): Theory, novelty, and consistency validation

Author:
Xuebo Yang; Yingjie Wang; Tiangang Yin; Cheng Wang; Nicolas Lauret; Omar Regaieg; Xiaohuan Xi; Jean Philippe Gastellu-Etchegorry
Source:
Remote sensing of environment 2022 v.272 pp. 112952
ISSN:
0034-4257
Subject:
information retrieval,   etc   ; algorithms; anisotropy; data collection; environment; forests; lidar; models; photons; radiative transfer;     Show all 10 Subjects
Abstract:
... Light Detection And Ranging (LiDAR) remote sensing is increasingly needed to assess the 3D architecture of Earth's surface. Physically-based LiDAR radiative transfer (RT) models are essential tools for interpreting LiDAR signals, designing LiDAR systems, and validating information retrieval methods. Discrete Anisotropic Radiative Transfer (DART) is one of the most accurate and comprehensive 3D RT ...
DOI:
10.1016/j.rse.2022.112952

11. A simulator of Synthetic Aperture Radar (SAR) image spectra: the applications on oceanswell waves

Author:
Felipe M. Santos; Andre L.C. Santos; Nelson Violante-Carvalho; Luiz Mariano Carvalho; Yuri O. Brasil-Correa; Jesus Portilla-Yandun; Roland Romeiser
Source:
International journal of remote sensing 2021 v.42 no.8 pp. 2981-3001
ISSN:
1366-5901
Subject:
information retrieval,   etc   ; image analysis; information processing; journals; oceans; remote sensing; satellites; synthetic aperture radar; testing;     Show all 9 Subjects
Abstract:
... The Synthetic Aperture Radar (SAR) carried on-board satellites yields invaluable data of global wave spectra since the early 1990s, with several satellites in orbit at present and more launches scheduled in the near future. However, the retrieval of wave information from SAR images constitutes a complex set of procedures. In this context, we have presented here a methodology to simulate SAR image ...
DOI:
10.1080/01431161.2020.1847352

12. Evaluation and analysis of new-energy vehicle industry policies in the context of technical innovation in China

Author:
Tong Yang; Chen Xing; Xinyu Li
Source:
Journal of cleaner production 2021 v.281 pp. 125126
ISSN:
0959-6526
Subject:
information retrieval,   etc   ; economic development; industry; information; issues and policy; market competition; models; planning; subsidies; China;     Show all 10 Subjects
Abstract:
... Low-carbon economic development, information and communication technical innovation have been intensifying the pursuit of new-energy vehicles. This emerging sector has far-reaching implications for the country’s industrial competitiveness and for low-carbon transport. The industry, in turn, is affected by state policies, which need to be evaluated in quantitative terms to provide a scientific basi ...
DOI:
10.1016/j.jclepro.2020.125126

13. Construction and application of the knowledge graph method in management of soil pollution in contaminated sites: A case study in South China

Author:
Feng Han; Yirong Deng; Qiyuan Liu; Yongzhang Zhou; Jun Wang; Yongjian Huang; Qianlong Zhang; Jing Bian
Source:
Journal of environmental management 2022 v.319 pp. 115685
ISSN:
0301-4797
Subject:
information retrieval,   etc   ; case studies; environmental management; land use; models; risk; soil pollution; urban soils; China;     Show all 9 Subjects
Abstract:
... Contaminated sites are a main cause of urban soil problems and have led to increasing pollution and public risk in China as a result of the rapid growth of industrial and urban land use. Because land pollution involves extensive multi-source heterogeneous information, identifying the risk of urban soil pollution efficiently and predicting pollution-related events are important for urban environmen ...
DOI:
10.1016/j.jenvman.2022.115685

14. Exploring coral reef biodiversity via underwater soundscapes

Author:
Tzu-Hao Lin; Tomonari Akamatsu; Frederic Sinniger; Saki Harii
Source:
Biological conservation 2021 v.253 pp. 108901
ISSN:
0006-3207
Subject:
information retrieval,   etc   ; Ryukyu Archipelago; anthropogenic stressors; behavior change; biodiversity; coral reefs; corals; fish; humans; remote sensing; stakeholders;     Show all 11 Subjects
Abstract:
... Information on biodiversity is essential to evaluate the ecological status of coral reefs. Sounds produced by reef-associated organisms have been used as a biodiversity indicator. However, the interference from abiotic sounds and the lack of a comprehensive audio library have impeded effective evaluation. This study investigated the application of underwater soundscapes as a remote-sensing method ...
DOI:
10.1016/j.biocon.2020.108901

15. Shotgun chemome characterization of Artemisia rupestris L. Using direct infusion-MS/MSALL

Author:
Peijie Zhang; Jun Jiang; Ke Zhang; Wenjing Liu; Pengfei Tu; Jun Li; Yuelin Song; Jiao Zheng; Li Tang
Source:
Journal of chromatography 2021 v.1176 pp. 122735
ISSN:
1570-0232
Subject:
information retrieval,   etc   ; Artemisia rupestris; antiviral properties; flavonoids; fractionation; liquid chromatography; methanol; quinic acid; sesquiterpenoids; tandem mass spectrometry;     Show all 10 Subjects
Abstract:
... In comparison of liquid chromatography, direct infusion is a superior choice to achieve high-throughput measurements. The specificity and selectivity of tandem mass spectrometry (MS/MS) actually result in a so-called MS separation potential when chemical characterization of herbal medicines. Here, a MS/MSᴬᴸᴸ program was introduced to promote DI–MS/MS to be an eligible tool for shotgun chemome char ...
DOI:
10.1016/j.jchromb.2021.122735

16. An ensemble of inverse moment estimators for sufficient dimension reduction

Author:
Qin Wang; Yuan Xue
Source:
Computational statistics & data analysis 2021 v.161 pp. 107241
ISSN:
0167-9473
Subject:
information retrieval,   etc   ; data visualization; statistics;     Show all 3 Subjects
Abstract:
... Sufficient dimension reduction (SDR) is known to be a useful tool in data visualization and information retrieval for high dimensional data. Many well-known SDR approaches investigate the inverse conditional moments of the predictors given the response. Motivated by the idea of the aggregate dimension reduction, we propose an ensemble of inverse moment estimators to explore the central subspace. T ...
DOI:
10.1016/j.csda.2021.107241

17. Angle Effect on Typical Optical Remote Sensing Indices in Vegetation Monitoring

Author:
Lingxiao Gu; Yanmin Shuai; Congying Shao; Donghui Xie; Qingling Zhang; Yaoming Li; Jian Yang
Source:
Remote Sensing 2021 v.13 no.9 pp. -
ISSN:
2072-4292
Subject:
information retrieval,   etc   ; Landsat; canopy; forestry; maturity stage; normalized difference vegetation index; reflectance; soil; thematic maps; uncertainty; vegetation;     Show all 11 Subjects
Abstract:
... Optical remote sensing indices play an important role in vegetation information extraction and have been widely serving ecology, agriculture and forestry, urban monitoring, and other communities. Remote sensing indices are constructed from individual bands depending on special characteristics to enhance the typical spectral features for the identification or distinction of surface land covers. Wit ...
DOI:
10.3390/rs13091699

18. The Integration of Linguistic and Geospatial Features Using Global Context Embedding for Automated Text Geocoding

Author:
Zheren Yan; Can Yang; Lei Hu; Jing Zhao; Liangcun Jiang; Jianya Gong
Source:
ISPRS international journal of geo-information 2021 v.10 no.9 pp. -
ISSN:
2220-9964
Subject:
information retrieval,   etc   ; automation; data collection; geocoding; models; spatial data;     Show all 6 Subjects
Abstract:
... Geocoding is an essential procedure in geographical information retrieval to associate place names with coordinates. Due to the inherent ambiguity of place names in natural language and the scarcity of place names in textual data, it is widely recognized that geocoding is challenging. Recent advances in deep learning have promoted the use of the neural network to improve the performance of geocodi ...
DOI:
10.3390/ijgi10090572

19. Event Geoparser with Pseudo-Location Entity Identification and Numerical Argument Extraction Implementation and Evaluation in Indonesian News Domain

Author:
Agung Dewandaru; Dwi Hendratmo Widyantoro; Saiful Akbar
Source:
ISPRS international journal of geo-information 2020 v.9 no.12 pp. -
ISSN:
2220-9964
Subject:
information retrieval,   etc   ; adverse effects; choropleth maps; extraction; models; spatial data;     Show all 6 Subjects
Abstract:
... Geoparser is a fundamental component of a Geographic Information Retrieval (GIR) geoparser, which performs toponym recognition, disambiguation, and geographic coordinate resolution from unstructured text domain. However, geoparsing of news articles which report several events across many place-mentions in the document are not yet adequately handled by regular geoparser, where the scope of resoluti ...
DOI:
10.3390/ijgi9120712

20. Can the application of certain music information retrieval methods contribute to the machine learning classification of electrocardiographic signals?

Author:
Ennio Idrobo-Ávila; Humberto Loaiza-Correa; Rubiel Vargas-Cañas; Flavio Muñoz-Bolaños; Leon van Noorden
Source:
Heliyon 2021 v.7 no.2 pp. e06257
ISSN:
2405-8440
Subject:
information retrieval,   etc   ; descriptive statistics; electrocardiography; heart; heart rate; music; readability; wavelet;     Show all 8 Subjects
Abstract:
... The electrocardiogram is traditionally used to diagnose a large number of heart pathologies. Research to improve the readability and classification of cardiac signals includes studies geared toward sonification of the electrocardiographic signal and others involving features related to music processing, such as Mel-frequency cepstral coefficients. In terms of music processing features, this study ...
DOI:
10.1016/j.heliyon.2021.e06257