2,239 research outputs found
The Growth Mindset and Student Social and Emotional Skill Development: An Empirical Analysis Based on the OECD’s SSES
The mindset is a crucial factor influencing the behavior of individuals. This study aims to evaluate the growth mindset of 10- and 15-year-old adolescents and the relationship between their mindsets and social and emotional skills from the viewpoints of students, parents, and teachers, using OECD’s SSES 2019 data from Suzhou City. The research results show that the growth mindset of students is affected by their socioeconomic status; and that the growth mindset of students, parents, and teachers can significantly and positively predict student social and emotional skills
A comprehensive forecast for cosmological parameter estimation using joint observations of gravitational-wave standard sirens and short -ray bursts
In the third-generation (3G) gravitational-wave (GW) detector era, the
multi-messenger GW observation for binary neutron star (BNS) merger events can
exert great impacts on exploring the cosmic expansion history. In this work, we
comprehensively explore the potential of 3G GW standard siren observations in
cosmological parameter estimations by considering the 3G GW detectors and the
future short -ray burst (GRB) detector THESEUS-like telescope joint
observations. Based on the 10-year observation of different detection
strategies, we predict that the numbers of detectable GW-GRB events are 277-685
with the redshifts and the inclination angles . For the
cosmological analysis, we consider five typical dark energy models, i.e., the
CDM, CDM, CDM models, and interacting dark energy (IDE)
models (ICDM and ICDM). We find that GW can tightly constrain the
Hubble constant with precisions of -, but perform not well in
constraining other cosmological parameters. Fortunately, GW could effectively
break the cosmological parameter degeneracies generated by the mainstream EM
observations, CMB+BAO+SN (CBS). When combining the mock GW data with the CBS
data, CBS+GW can tightly constrain the equation of state parameter of dark
energy with a precision of , close to the standard of precision
cosmology. Meanwhile, the addition of GW to CBS could improve constraints on
cosmological parameters by -. In conclusion, GW standard siren
observations from 3G GW detectors could play a crucial role in helping solve
the Hubble tension and probe the fundamental nature of dark energy.Comment: 16 pages, 11 figure
Building cloud-based healthcare data mining services
The linkage between healthcare service and cloud computing techniques has drawn much attention lately. Up to the present, most works focus on IT system migration and the management of distributed healthcare data rather than taking advantage of information hidden in the data. In this paper, we propose to explore healthcare data via cloud-based healthcare data mining services. Specifically, we propose a cloud-based healthcare data mining framework for healthcare data mining service development. Under such framework, we further develop a cloud-based healthcare data mining service to predict patients future length of stay in hospital
Students of Chinese Language Major and Their Attitude Towards the Current Learning Study in Vietnam
Chinese language has recently grown so rapidly that people compared it to a storm overflowing into Vietnam. Thus, education managers and teachers can only respond promptly by immediate emergency measures, but have not found measures for stable development. The learning situation therefore also becomes chaotic and the quality does not meet social requirements.This article aims to analyze the current situation of Vietnamese students studying Chinese language by applying methods of current situation survey by questionnaires, observations in actuality and document research. Through this, the author figure out the true situation of learning attitude and student’s assessment of their schools’ quality of teaching. Results of the research will help teachers to better adjust their teaching methods, and help educational managers have more effective education policies
Joint constraints on cosmological parameters using future multi-band gravitational wave standard siren observations
Gravitational waves (GWs) from the compact binary coalescences can be used as
standard sirens to explore the cosmic expansion history. In the next decades,
it is anticipated that we could obtain the multi-band GW standard siren data
(from nanohertz to a few hundred hertz), which are expected to play an
important role in cosmological parameter estimation. In this work, we give for
the first time the joint constraints on cosmological parameters using the
future multi-band GW standard siren observations. We simulate the multi-band GW
standard sirens based on the SKA-era pulsar timing array (PTA), the Taiji
observatory, and the Cosmic Explorer (CE) to perform cosmological analysis. In
the CDM model, we find that the joint PTA+Taiji+CE data could provide
a tight constraint on the Hubble constant with a precision. Moreover,
PTA+Taiji+CE could break the cosmological parameter degeneracies generated by
CMB, especially in the dynamical dark energy models. When combining the
PTA+Taiji+CE data with the CMB data, the constraint precisions of and are and , meeting the standard of precision
cosmology. The joint CMB+PTA+Taiji+CE data give in the CDM
model and and in the CDM model,
which are comparable with or close to the latest constraint results by
CMB+BAO+SN. In conclusion, it is worth expecting to use the future multi-band
GW observations to explore the nature of dark energy and measure the Hubble
constant.Comment: 12 pages, 6 figures; accepted for publication in Chinese Physics
Prospects for probing the interaction between dark energy and dark matter using gravitational-wave dark sirens with neutron star tidal deformation
Gravitational wave (GW) standard siren observations provide a rather useful
tool to explore the evolution of the universe. In this work, we wish to
investigate whether the dark sirens with neutron star (NS) deformation from
third-generation (3G) GW detectors could help probe the interaction between
dark energy and dark matter. We simulate the GW dark sirens of four detection
strategies based on the three-year observation and consider four
phenomenological interacting dark energy models to perform cosmological
analysis. We find that GW dark sirens could provide tight constraints on
and in the four IDE models, but perform not well in
constraining the dimensionless coupling parameter with the interaction
proportional to the energy density of cold dark matter. Nevertheless, the
parameter degeneracy orientations of CMB and GW are almost orthogonal, and thus
the combination of them could effectively break cosmological parameter
degeneracies, with the constraint errors of being 0.00068-0.018. In
addition, we choose three typical equation of states (EoSs) of NS, i.e., SLy,
MPA1, and MS1, to investigate the effect of NS's EoS in cosmological analysis.
The stiffer EoS could give tighter constraints than the softer EoS.
Nonetheless, the combination of CMB and GW dark sirens (using different EoSs of
NS) shows basically the same constraint results of cosmological parameters. We
conclude that the dark sirens from 3G GW detectors would play a crucial role in
helping probe the interaction between dark energy and dark matter, and the
CMB+GW results are basically not affected by the EoS of NS.Comment: 12 pages, 9 figure
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