Results 41 to 50 of about 19,364 (340)

Formation, Orbital and Internal Evolutions of Young Planetary Systems [PDF]

open access: yes, 2016
The growing body of observational data on extrasolar planets and protoplanetary disks has stimulated intense research on planet formation and evolution in the past few years.
Bai, Xuening   +3 more
core   +4 more sources

Competition Pattern and Coping Strategies in Near Space [PDF]

open access: yes中国工程科学
The near space serves as a transition area between airspace and the outer space, and it has unique strategic values and broad application prospects, attracting countries to compete for development.
Junlin Yang   +4 more
doaj   +1 more source

Clustering Code Biases between BDS-2 and BDS-3 Satellites and Effects on Joint Solution

open access: yesRemote Sensing, 2020
China’s BeiDou navigation satellite system (BDS) has finished global constellation construction and can achieve joint solution, simultaneously relying on the B1I + B3I signals of the BDS-2 and BDS-3 satellites.
Liang Chen   +5 more
doaj   +1 more source

USER IMPLEMENTATION AND ASSESSMENT OF BDS-3 PRECISE POINT POSITIONING AUGMENTATION SERVICE WITH NO ECONOMIC COST [PDF]

open access: yes, 2023
The satellite-based precise point positioning (PPP) service enables users with high accuracy positions without Internet connections. Currently, two types of satellite-based PPP services are available.
C. Ouyang   +16 more
core   +1 more source

Impacts of Arc Length and ECOM Solar Radiation Pressure Models on BDS-3 Orbit Prediction

open access: yesRemote Sensing, 2022
The BeiDou global navigation satellite system (BDS-3) has already provided worldwide navigation and positioning services for which the high-precision BDS-3-predicting orbit is the foundation.
Ran Li   +7 more
doaj   +1 more source

N=4 supersymmetric Yang Mills scattering amplitudes at high energies: the Regge cut contribution

open access: yes, 2008
We further investigate, in the planar limit of N=4 supersymmetric Yang Mills theories,the high energy Regge behavior of six-point MHV scattering amplitudes.
A. Sabio Vera   +16 more
core   +1 more source

On the microscopic mechanism behind the purely orientational disorder-disorder transition in the plastic phase of 1-chloroadamantane [PDF]

open access: yes, 2017
Globular molecules of 1-chloroadamantane form a plastic phase in which the molecules rotate in a restrained way, but with their centers of mass forming a crystalline ordered lattice.
Cuello, G. J.   +7 more
core   +2 more sources

Mandelstam cuts and light-like Wilson loops in N=4 SUSY

open access: yes, 2010
We perform an analytic continuation of the two-loop remainder function for the six-point planar MHV amplitude in N=4 SUSY, found by Goncharov, Spradlin, Vergu and Volovich from the light-like Wilson loop representation.
A. Prygarin   +6 more
core   +1 more source

Analysis of BDS-3 Onboard Clocks Based on GFZ Precise Clock Products

open access: yesRemote Sensing, 2022
The characteristics and performance of satellite clocks are important to the positioning, navigation, and timing (PNT) services of Global Navigation Satellite System (GNSS) users.
Tao Geng, Rui Jiang, Yifei Lv, Xin Xie
doaj   +1 more source

A massive Feynman integral and some reduction relations for Appell functions

open access: yes, 2007
New explicit expressions are derived for the one-loop two-point Feynman integral with arbitrary external momentum and masses $m_1^2$ and $m_2^2$ in D dimensions. The results are given in terms of Appell functions, manifestly symmetric with respect to the
Abramowitz M.   +9 more
core   +1 more source

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