Results 11 to 20 of about 631,049 (308)

Reference satellite selection method for GNSS high-precision relative positioning

open access: yesGeodesy and Geodynamics, 2017
Selecting the optimal reference satellite is an important component of high-precision relative positioning because the reference satellite directly influences the strength of the normal equation.
Xiao Gao   +3 more
doaj   +2 more sources

Precision of methods for calculating identity-by-descent matrices using multiple markers [PDF]

open access: yesGenetics Selection Evolution, 2002
A rapid, deterministic method (DET) based on a recursive algorithm and a stochastic method based on Markov Chain Monte Carlo (MCMC) for calculating identity-by-descent (IBD) matrices conditional on multiple markers were compared using stochastic ...
Sørensen Anders   +3 more
doaj   +2 more sources

High-Precision Collaborative Relative Navigation Method for Multiple Aircraft Based on Geometric Topology Constraints [PDF]

open access: yesHangkong bingqi
Multiple aircraft formation has strong multi operation capability, high reliability and high overall efficiency, which is an important direction for the future development of aviation field.
Lu Kewen, Wang Xinlong, Wang Bin
doaj   +2 more sources

Precision Inter-Row Relative Positioning Method by Using 3D LiDAR in Planted Forests and Orchards

open access: yesAgronomy
Accurate positioning at the inter-row canopy can provide data support for precision variable-rate spraying. Therefore, there is an urgent need to design a reliable positioning method for the inter-row canopy of closed orchards (planted forests).
Limin Liu   +4 more
doaj   +2 more sources

High-Precision Time Transfer and Relative Orbital Determination Among LEO Satellites in Real Time [PDF]

open access: yesNavigation
For low-Earth-orbit (LEO) satellites, high-precision clock estimation often depends on high-precision real-time global navigation satellite system (GNSS) products. Thus, service providers often choose to downlink observation data to the ground to achieve
Kan Wang   +3 more
doaj   +2 more sources

EVALUATION OF PHOTOGRAMMETRIC PRODUCTS OF A KARST UNIT OBTAINED WITH A DRONE

open access: yesTropical and Subtropical Agroecosystems, 2021
Background. The rapid technological development of drones has been used in different disciplines as a new tool for the collection of geospatial data.
Gonzalo Neftaly Gijón-Yescas   +4 more
doaj   +1 more source

Performance Evaluation of Real-time DustTrak Monitors for Outdoor Particulate Mass Measurements in a Desert Environment

open access: yesAerosol and Air Quality Research, 2021
Using the filter-based gravimetric technique as the reference method, this study aimed to evaluate the performance of the TSI DustTrak DRX® aerosol monitor, which offers real-time measurements, and establish suitable factors for bias correction in real ...
Wasim Javed, Bing Guo
doaj   +1 more source

Precision- and relative precision-recall curves drawn by hypothetical models with different discriminability.

open access: yes, 2023
Properties of the three hypothetical models NP (A), MP (B) and PP (C), and quality breakdown in hypothetical seed batches with initial precision (iP, eligibility rate before sorting) of 0.8 (80%) or 0.6 (60%) are shown in Table 3. Relative precision (rP)
Yoshinori Ohara (17014574)   +1 more
core   +1 more source

Precision- and relative precision-recall relationships in discrimination for fully eligible cauliflower seeds by “successive method”.

open access: yes, 2023
Curves (curved surfaces) representing precision-recall (PR) (A) and relative precision-recall (rPR) (B) relationships are drawn planarly in head maps.
Yoshinori Ohara (17014574)   +1 more
core   +1 more source

RELATIVE PRECISION OF SOME INCOMPLETE BLOCK DESIGNS FOR SOYBEAN UNIFORMITY TRIALS AND OPTIMUM SAMPLE SIZE [PDF]

open access: yesJournal of Plant Production, 2000
Experiments of the present study were conducted at the Experimental Station, Faculty of Agriculture, Cairo University, Egypt in 1998 and 1999 seasons. Cutler and Crawford soybean cultivars were used. In 1998 and 1999 four uniformity trials were conducted
M. Shafik, R. Taha,
doaj   +1 more source

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