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Temporal alignment
2012
Proceedings of the 2012 international conference on Management of Data - SIGMOD '12
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We introduce two temporal primitives, temporal splitter and temporal aligner, and define rules that use these primitives to reduce the operators of a temporal algebra to their nontemporal counterparts. ...
In order to process interval timestamped data, the sequenced semantics has been proposed. ...
In the query processing sequence transformations between these nodes were implemented: SQL query parser −→ parse tree analyzer −→ query tree optimizer −→ plan tree executor −→ execution tree. ...
doi:10.1145/2213836.2213886
dblp:conf/sigmod/DignosBG12
fatcat:aotwgszbbrgk3ik5fnpzl2ehva
Extending the Kernel of a Relational DBMS with Comprehensive Support for Sequenced Temporal Queries
2016
ACM Transactions on Database Systems
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By providing a set of reduction rules, we can transform any temporal query, expressed in terms of temporal relational operators, to a query expressed in terms of relational operators and the two new operators ...
By providing a set of reduction rules, we can transform any temporal query, expressed in terms of temporal relational operators, to a query expressed in terms of relational operators and the two new operators ...
ACKNOWLEDGMENTS We thank Peter Moser for his help in implementing the extensions in PostgreSQL. ...
doi:10.1145/2967608
fatcat:6hvioaktwfhl7j7wmls5lxupem
Database Technology for Processing Temporal Data (Invited Paper)
2018
International Symposium/Workshop on Temporal Representation and Reasoning
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of existing query optimization and evaluation technologies. ...
New challenges for processing temporal data arise with multiple dimensions of time and the increasing amounts of data, including time series data that represent a special kind of temporal data. ...
This strategy renders it possible to fully leverage the query optimization and evaluation engine of a DBMS for sequenced temporal query processing. ...
doi:10.4230/lipics.time.2018.2
dblp:conf/time/BohlenDGJ18
fatcat:j3kfsfijijfi7o6wpsytjbnw7u
Optique: Towards OBDA Systems for Industry
[chapter]
2013
Lecture Notes in Computer Science
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Roshchin, and D. Fabio Savo for insightful discussions. The authors are supported by the EU project Optique (FP7-IP-318338). ...
The query language that the system should provide to end-users should combine (i) temporal operators, that address the time dimension of data and allow to retrieve data which was true "always" in the past ...
, (iii) query answering, and (iv) processing and analytics of streaming and temporal data. ...
doi:10.1007/978-3-642-41242-4_11
fatcat:axcmbjydbzfnth7f4gzl22dpky
Complex Patten Processing in Spatio-temporal Databases
2014
Proceedings of 3rd International Conference on Data Management Technologies and Applications
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STEPQ enables full-fledged and optimized integration between spatiotemporal queries and complex event processing (CEP). ...
In this paper, we present the STEPQ system, which is an extensible spatio-temporal query engine for complex pattern processing over spatio-temporal data. ...
In Example 1, the query involves several spatiotemporal range queries, time-based correlation among the queries' results, and persistency semantics, e.g., the criminal should stay in the school area for ...
doi:10.5220/0004992401570169
dblp:conf/data/ZhengDTE14
fatcat:xvjadll4wvdn5au3jjr5luid5y
MAC: Mining Activity Concepts for Language-based Temporal Localization
[article]
2018
arXiv
pre-print
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in videos and queries. ...
We address the problem of language-based temporal localization in untrimmed videos. ...
Acknowledgements This research was supported, in part, by the Office of Naval Research under grant N00014-18-1-2050 and by an Amazon Research Award. ...
arXiv:1811.08925v1
fatcat:azp2vhcjfzbnblt46eobznihh4
Few-shot Action Recognition with Implicit Temporal Alignment and Pair Similarity Optimization
[article]
2020
arXiv
pre-print
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wide variations and misalignment of temporal sequences make the video-level similarity comparison difficult; 3) the scarcity of labeled data makes the optimization difficult. ...
Although there has been a lot of work in this area recently, most of the existing work is based on image classification tasks. ...
And then the implicit alignment module is used to align a given query video with the support videos semantically at video-level. ...
arXiv:2010.06215v1
fatcat:hhchjwegsjfkxnpv4xoykxy5vu
Diachronic Cross-modal Embeddings
2019
Proceedings of the 27th ACM International Conference on Multimedia - MM '19
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2019 pre-print arXiv:1909.13689v1 fatcat:a7fn7s6ykfbzbe47wvou7mxe5y
structuring constraints based on a temporal alignment window. ...
This paper introduces a novel diachronic cross-modal embedding (DCM), where cross-modal correlations are represented in embedding space, throughout the temporal dimension, preserving semantic similarity ...
In [14] temporal clues were used to improve search relevance at query time, by modelling content streams using a multi-task regression on multivariate point processes. In Uricchio et al. ...
doi:10.1145/3343031.3351036
dblp:conf/mm/SemedoM19a
fatcat:sv6uekobmbfxteqybxt6tnv26i
Reinforcement Learning for Weakly Supervised Temporal Grounding of Natural Language in Untrimmed Videos
[article]
2020
arXiv
pre-print
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As it is non-trivial to obtain a straightforward reward function in the absence of pairwise granular boundary-query annotations, a cross-modal alignment evaluator is crafted to measure the alignment degree ...
In this paper, we propose a Boundary Adaptive Refinement (BAR) framework that resorts to reinforcement learning (RL) to guide the process of progressively refining the temporal boundary. ...
Temporal grounding of natural language aims to determine the start and end time of a temporal segment in an untrimmed video that corresponds to a language query. ...
arXiv:2009.08614v1
fatcat:kbb5c5y2bjbhhjvfrgrnotkkla
Coarse-to-fine Semantic Localization with HD Map for Autonomous Driving in Structural Scenes
[article]
2021
arXiv
pre-print
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In tracking stage, vehicle pose is refined by implicitly aligning the semantic segmentation result between image and landmarks in HD maps with photometric consistency. ...
To this end, we formulate vision-based localization as a data association problem that maps visual semantics to landmarks in HD map. ...
Localization accuracy evaluations of several data sequences are reported in module
time(ms)
image post-process
6.24
map query
0.73
pose optimization
1.76
pose search
0.60
total track time
12.05 ...
arXiv:2107.02557v1
fatcat:fzloh5lyufebhaoo5sfezoaqlu
Temporal Data Management – An Overview
[chapter]
2018
Lecture Notes in Business Information Processing
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optimization and indexing of DBMS can be used Break timestamps into pieces that are aligned Then, equality on aligned timestamps can be used Two primitives are required: Temporal Normalizer: for operators ...
Gamper
eBISS 2017 -July 3, 2017
27
Background in Temporal Databases
Strong Interval-Based Data Models
Intervals are atomic units (and not just sets of time points) and carry
meaning/semantics ...
Timestamps must be adjusted for the result Some values must be scaled to the adjusted timestamps
Constructing Temporal Algebra Expressions Query: Temporal aggregation Input: Jul] Answer: ϑ T MAX (X ...
doi:10.1007/978-3-319-96655-7_3
fatcat:tt3jp2tmgjbrjpyrzcrn2zwekm
Dynamic Word Embeddings for Evolving Semantic Discovery
2018
Proceedings of the Eleventh ACM International Conference on Web Search and Data Mining - WSDM '18
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2017 pre-print arXiv:1703.00607v1 fatcat:njpbpf6juzb6lmj2nbsm4z5hzeOther Versions
both semantic accuracy and alignment quality. ...
In this paper, we develop a dynamic statistical model to learn time-aware word vector representation. ...
of embeddings is built into the optimization process and involves embeddings across time slices simultaneously, the quality of alignment is be er than post-learning alignments that only consider two time ...
doi:10.1145/3159652.3159703
dblp:conf/wsdm/YaoSDRX18
fatcat:yeeygsqt2raijkci7gvk5l3wya
Learning Commonsense-aware Moment-Text Alignment for Fast Video Temporal Grounding
[article]
2022
arXiv
pre-print
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Grounding temporal video segments described in natural language queries effectively and efficiently is a crucial capability needed in vision-and-language fields. ...
Finally, to maintain the original semantic information of textual queries, a cross-modal complementary common space is optimized to obtain matching scores for performing FVTG. ...
[2] propose a Semantic Conditioned Dynamic Modulation (SCDM), which can dynamically adjust the temporal convolution according to the query semantics, and integrate the query with visual representations ...
arXiv:2204.01450v2
fatcat:2jgrim33szerhbggwpkayiuzta
Weakly-Supervised Video Moment Retrieval via Semantic Completion Network
2020
PROCEEDINGS OF THE THIRTIETH AAAI CONFERENCE ON ARTIFICIAL INTELLIGENCE AND THE TWENTY-EIGHTH INNOVATIVE APPLICATIONS OF ARTIFICIAL INTELLIGENCE CONFERENCE
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Existing methods are mostly trained in a fully-supervised setting, which requires the full annotations of temporal boundary for each query. ...
Next, we build a semantic completion module to measure the semantic similarity between the selected proposals and query, compute reward and provide feedbacks to the proposal generation module for scoring ...
Acknowledgements This work is supported by the National Natural Science Foundation of China under Grant No.61602405, No.U1611461, No.61751209 and No.61836002, China ...
doi:10.1609/aaai.v34i07.6820
fatcat:zveh5blsg5ehvapv2aes7unvye
Information-centric industrial Internet of Things: Service model
2012
2012 IEEE 2nd International Conference on Cloud Computing and Intelligence Systems
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Through the optimal composition of elementary services, decentralized applications are implemented in the service-oriented architecture. ...
Knowledge and services are defined and formulated using ontology models in a modeling layer. ...
The query engine queries real-time data in terms of ontology-based semantic contexts from the perception layer (Fig. 2) . ...
doi:10.1109/ccis.2012.6664557
dblp:conf/ccis/WangZWZKZ12
fatcat:jrgmrfdyyvgu7fntv5vxek2gmu
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