Shulei Ni
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Shulei Ni has a total of 8 co-authors. Here are the top co-authors by number of shared publications:
- Taotao Qiu
Institute of Astrophysics Central China Normal University 430079 Wuhan China
3 shared publications - Hong Li
Institute of High Energy Physics Key Laboratory of Particle Astrophysics Chinese Academy of Sciences 19B Yuquan Road Beijing P.R. China
2 shared publications - Taishi Katsuragawa
Central China Normal University
2 shared publications - Wei Zheng
Institute of High Energy Physics Key Laboratory of Particle Astrophysics Chinese Academy of Sciences 100086 Beijing China
2 shared publications - Xin Zhang
Northeastern University
2 shared publications - Donghui Quan
Department of Physics, Xi’an Jiaotong-Liverpool University
1 shared publication
Latest Publications
- Open Access
- 12 November 2026
- Published by MDPI AG in Preprints.org
Prior-Sensitive Ranking of Fast Radio Burst Repeater Candidates for Targeted Follow-Up
Identifying fast radio burst (FRB) sources likely to repeat can guide targeted observations and advance our understanding of their populations. We investigate repeater-candidate selection using 18 observational parameters from a Blinkverse-based sample of 3990 sources, including 104 confirmed repeaters. Eight model configurations are compared across four positive-training sizes and 30 random seeds. Positive–unlabelled (PU) Bagging-RF achieves competitive performance, recovering an average of 92.27% of 44 held-out repeaters within the highest-ranked 30% of test sources when trained on 60 confirmed repeaters. We further combine this model with cross-fitted calibration to estimate conditional repeater probabilities for 3886 unlabelled sources. Analysis across assumed repeater fractions quantifies prior sensitivity, while repeated fits characterize ranking stability. The resulting catalogue integrates these estimates with source-specific observational information to support follow-up target selection.
- 12 November 2026
- Published by MDPI AG in Preprints.org
Open AccessPrior-Sensitive Ranking of Fast Radio Burst Repeater Candidates for Targeted Follow-Up
Identifying fast radio burst (FRB) sources likely to repeat can guide targeted observations and advance our understanding of their populations. We investigate repeater-candidate selection using 18 observational parameters from a Blinkverse-based sample of 3990 sources, including 104 confirmed repeaters. Eight model configurations are compared across four positive-training sizes and 30 random seeds. Positive–unlabelled (PU) Bagging-RF achieves competitive performance, recovering an average of 92.27% of 44 held-out repeaters within the highest-ranked 30% of test sources when trained on 60 confirmed repeaters. We further combine this model with cross-fitted calibration to estimate conditional repeater probabilities for 3886 unlabelled sources. Analysis across assumed repeater fractions quantifies prior sensitivity, while repeated fits characterize ranking stability. The resulting catalogue integrates these estimates with source-specific observational information to support follow-up target selection.
- Open Access
Confronting Inflation Models with the Coming Observations on Primordial Gravitational Waves
The recent observations from CMB have imposed a very stringent upper-limit on the tensor/scalar ratio $r$ of inflation models, $r < 0.064$, which indicates that the primordial gravitational waves (PGW), even though possible to be detected, should have a power spectrum of a tiny amplitude. However, current experiments on PGW is ambitious to detect such a signal by improving the accuracy to an even higher level. Whatever their results are, it will give us much information about the early Universe, not only from the astrophysical side but also from the theoretical side, such as model building for the early Universe. In this paper, we are interested in analyzing what kind of inflation models can be favored by future observations, starting with a kind of general action offered by the effective field theory (EFT) approach. We show a general form of $r$ that can be reduced to various models, and more importantly, we show how the accuracy of future observations can put constraints on model parameters by plotting the contours in their parameter spaces.Open AccessConfronting Inflation Models with the Coming Observations on Primordial Gravitational Waves
The recent observations from CMB have imposed a very stringent upper-limit on the tensor/scalar ratio $r$ of inflation models, $r < 0.064$, which indicates that the primordial gravitational waves (PGW), even though possible to be detected, should have a power spectrum of a tiny amplitude. However, current experiments on PGW is ambitious to detect such a signal by improving the accuracy to an even higher level. Whatever their results are, it will give us much information about the early Universe, not only from the astrophysical side but also from the theoretical side, such as model building for the early Universe. In this paper, we are interested in analyzing what kind of inflation models can be favored by future observations, starting with a kind of general action offered by the effective field theory (EFT) approach. We show a general form of $r$ that can be reduced to various models, and more importantly, we show how the accuracy of future observations can put constraints on model parameters by plotting the contours in their parameter spaces. - Open Access
- 17 December 2020
- Published by Springer Nature in The European Physical Journal C
- Vol. 80 (12) , 1-17
Confronting inflation models with the coming observations on primordial gravitational waves
The recent observations from CMB have imposed a very stringent upper-limit on the tensor/scalar ratio r of inflation models, $$r < 0.064$$ , which indicates that the primordial gravitational waves (PGW), even though possible to be detected, should have a power spectrum of a tiny amplitude. However, current experiments on PGW is ambitious to detect such a signal by improving the accuracy to an even higher level. Whatever their results are, it will give us much information about the early Universe, not only from the astrophysical side but also from the theoretical side, such as model building for the early Universe. In this paper, we are interested in analyzing what kind of inflation models can be favored by future observations, starting with a kind of general action offered by the effective field theory (EFT) approach. We show a general form of r that can be reduced to various models, and more importantly, we show how the accuracy of future observations can put constraints on model parameters by plotting the contours in their parameter spaces.- 17 December 2020
- Published by Springer Nature in The European Physical Journal C
- Vol. 80 (12) , 1-17
Open AccessConfronting inflation models with the coming observations on primordial gravitational waves
The recent observations from CMB have imposed a very stringent upper-limit on the tensor/scalar ratio r of inflation models, $$r < 0.064$$ , which indicates that the primordial gravitational waves (PGW), even though possible to be detected, should have a power spectrum of a tiny amplitude. However, current experiments on PGW is ambitious to detect such a signal by improving the accuracy to an even higher level. Whatever their results are, it will give us much information about the early Universe, not only from the astrophysical side but also from the theoretical side, such as model building for the early Universe. In this paper, we are interested in analyzing what kind of inflation models can be favored by future observations, starting with a kind of general action offered by the effective field theory (EFT) approach. We show a general form of r that can be reduced to various models, and more importantly, we show how the accuracy of future observations can put constraints on model parameters by plotting the contours in their parameter spaces. - Open Access
- 30 July 2018
- Published by Springer Nature in The European Physical Journal C
- Vol. 78 (8) , 608
Probing signatures of bounce inflation with current observations
- 30 July 2018
- Published by Springer Nature in The European Physical Journal C
- Vol. 78 (8) , 608
Open AccessProbing signatures of bounce inflation with current observations
- Open Access
Probing signatures of bounce inflation with current observations
The aim of this paper is to probe the features of the bouncing cosmology with the current observational data. Basing on bounce inflation model, with high derivative term, we propose a general parametrization of primordial power spectrum which includes the typical bouncing parameters, such as bouncing time-scale, and energy scale. By applying Markov Chain Monto Carlo analysis with current data combination of Planck 2015, BAO and JLA, we report the posterior probability distributions of the parameters. We find that, bouncing models can well explain CMB observations, especially the deficit and oscillation on large scale in TT power spectrum.
Open AccessProbing signatures of bounce inflation with current observations
The aim of this paper is to probe the features of the bouncing cosmology with the current observational data. Basing on bounce inflation model, with high derivative term, we propose a general parametrization of primordial power spectrum which includes the typical bouncing parameters, such as bouncing time-scale, and energy scale. By applying Markov Chain Monto Carlo analysis with current data combination of Planck 2015, BAO and JLA, we report the posterior probability distributions of the parameters. We find that, bouncing models can well explain CMB observations, especially the deficit and oscillation on large scale in TT power spectrum.