Results 1 to 10 of about 1,309,218 (220)

On quintessence star model and strange star [PDF]

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
The astronomical observations on the accelerated expansion of the universe generate the possibility that the internal matter of the stars is not only formed by ordinary matter but also by matter with negative pressure.
Gabino Estevez-Delgado   +1 more
doaj   +3 more sources

A High Precision Star Image Pre-Processing Method Against Earth-Atmosphere Radiation of Star Sensor [PDF]

open access: yesHangkong bingqi, 2023
Star sensors installed on near-space vehicles are susceptible to earth-atmosphere radiation. As a result, the accuracy of star extraction and the performance of celestial system is significantly degraded.
Liu Yuxin, Wang Xinlong, Hu Xiaodong, Wang Xun
doaj   +1 more source

A Syntactical Spatio-Functional Analysis of Four Typical Historic Chinese Towns from a Heritage Tourism Perspective

open access: yesLand, 2022
This study presents a quantitative approach to exploring the spatio-functional characteristics of historic Chinese towns (HCTs) from a heritage tourism perspective.
Pan Liao   +3 more
doaj   +1 more source

Standardization of experimental model regarding star fruit intoxication in Wistar rats suffering with nephropathy [PDF]

open access: yesActa Cirúrgica Brasileira, 2021
Purpose To present a model to reproduce the clinical condition, in order to better understand the pathophysiology of neurological impairment related to intoxication. Methods Twenty-five Wistar rats were used and divided into five groups: Shaw group (WHI)
Layla Alves Rodrigues da Silva   +5 more
doaj   +2 more sources

Planar peristrophic multiplexing metasurfaces

open access: yesOpto-Electronic Advances, 2023
As a promising counterpart of two-dimensional metamaterials, metasurfaces enable to arbitrarily control the wavefront of light at subwavelength scale and hold promise for planar holography and applicable multiplexing devices. Nevertheless, the degrees of
Jia Chen   +5 more
doaj   +1 more source

Image Degradation Model for Dynamic Star Maps in Multiple Scenarios

open access: yesPhotonics, 2022
To meet the ground test requirements of star sensors, we establish the star map simulation algorithm and the interactive interface in multiple scenarios.
Haima Yang   +8 more
doaj   +1 more source

UAV Path Planning Model Based on R5DOS Model Improved A-Star Algorithm

open access: yesApplied Sciences, 2022
In order to solve the problems of large amounts of calculation and long calculation times of the A-star algorithm in three-dimensional space, based on the R5DOS model, this paper proposes a three-dimensional space UAV path planning model.
Jian Li   +4 more
doaj   +1 more source

Development of Daytime Observation Model for Star Sensor and Centroiding Performance Analysis [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2005
A star sensor daytime observation model is developed in order to test the performance of the star sensor useful for daylight application. The centroid errors of the star sensor in the day time application are computed by using the model.
Jakyoung Nah, Yu Yi, Yong Ha Kim
doaj   +1 more source

RJA-Star Algorithm for UAV Path Planning Based on Improved R5DOS Model

open access: yesApplied Sciences, 2023
To improve the obstacle avoidance ability of agricultural unmanned aerial vehicles (UAV) in farmland settings, a three-dimensional space path planning model based on the R5DOS model is proposed in this paper. The direction layer of the R5DOS intersection
Jian Li   +5 more
doaj   +1 more source

A progeroid syndrome caused by a deep intronic variant in TAPT1 is revealed by RNA/SI‐NET sequencing

open access: yesEMBO Molecular Medicine, 2023
Exome sequencing has introduced a paradigm shift for the identification of germline variations responsible for Mendelian diseases. However, non‐coding regions, which make up 98% of the genome, cannot be captured.
Nasrinsadat Nabavizadeh   +20 more
doaj   +1 more source

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