Results 11 to 20 of about 215,550 (310)

Estimation Theory

open access: yes, 2022
AbstractThis chapter is on classical statistical decision theory. It is an important chapter for historical reasons, but it also provides the right mathematical grounding and intuition for more modern statistical tools from data science and machine learning.
Mario V. Wüthrich, Michael Merz
openaire   +1 more source

A BiLSTM cardinality estimator in complex database systems based on attention mechanism

open access: yesCAAI Transactions on Intelligence Technology, 2022
An excellent cardinality estimation can make the query optimiser produce a good execution plan. Although there are some studies on cardinality estimation, the prediction results of existing cardinality estimators are inaccurate and the query efficiency ...
Qiang Zhou   +8 more
doaj   +1 more source

Novel distributed state estimation method for the AC-DC hybrid microgrid based on the Lagrangian relaxation method

open access: yesThe Journal of Engineering, 2019
The AC-DC hybrid microgrid is a credible evolution path for the microgrid. State estimation in complex distribution network is a significant foundation for the safe operation.
Ling Ping   +3 more
doaj   +1 more source

Quickest attack detection in smart grid based on sequential Monte Carlo filtering

open access: yesIET Smart Grid, 2020
Quick and accurate detection of cyber-attacks is key to the normal operation of the smart grid system. In this study, joint state estimation and sequential attack detection method for a given bus with grid frequency drift is proposed that utilises the ...
Leian Chen, Xiaodong Wang
doaj   +1 more source

Imputing missing values using cumulative linear regression

open access: yesCAAI Transactions on Intelligence Technology, 2019
The concept of missing data is important to apply statistical methods on the dataset. Statisticians and researchers may end up to an inaccurate illation about the data if the missing data are not handled properly.
Samih M. Mostafa
doaj   +1 more source

A New Probability Density Function for Minimizing Geometric Dilution of Precision in Location-Aware Wireless Communications

open access: yesIEEE Access, 2020
Cellular site planners have long used propagation models for optimizing an architecture deployment strategy. The foundation of these models are a plethora of theoretical results that all contribute to a probabilistic understanding of this phenomenon.
John D. Roth   +2 more
doaj   +1 more source

Prior knowledge‐based statistical estimation of linear false tracks in uniform distributed clutter

open access: yesIET Radar, Sonar & Navigation, 2021
A large number of initialised false tracks in clutter environments will cause a heavy burden on the detection and track‐processing system. The quantity of initialised false tracks in clutter used to be estimated by experience or simulation, which lacks a
Fei Wang   +3 more
doaj   +1 more source

Information-Driven Gas Distribution Mapping for Autonomous Mobile Robots

open access: yesSensors, 2023
The ability to sense airborne pollutants with mobile robots provides a valuable asset for domains such as industrial safety and environmental monitoring.
Andres Gongora   +5 more
doaj   +1 more source

IPDDF: an improved precision dense descriptor based flow estimation

open access: yesCAAI Transactions on Intelligence Technology, 2020
Large displacement optical flow algorithms are generally categorised into descriptor-based matching and pixel-based matching. Descriptor-based approaches are robust to geometric variation, however they have inherent localisation precision limitation due ...
Weiyong Eng, Voonchet Koo, Tiensze Lim
doaj   +1 more source

The Statistical Estimation Averaging Method to Express the Effective Electromagnetic Parameters over a Planar Information Meta-Surface

open access: yesMathematics, 2022
The electromagnetic scattering of a meta-surface, formed by a honeycomb substrate or periodical arranged meta-materials, has great meanings to communication technologies.
Ting-Ting Gu, Tie-Jun Cui
doaj   +1 more source

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