Pengjie Zhang

ORCID: 0000-0001-8335-8742
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About
Contact & Profiles
Research Areas
  • Galaxies: Formation, Evolution, Phenomena
  • Cosmology and Gravitation Theories
  • Astronomy and Astrophysical Research
  • Radio Astronomy Observations and Technology
  • Adaptive optics and wavefront sensing
  • Astrophysics and Cosmic Phenomena
  • Gamma-ray bursts and supernovae
  • Pulsars and Gravitational Waves Research
  • Geophysics and Gravity Measurements
  • Birth, Development, and Health
  • Dark Matter and Cosmic Phenomena
  • Stellar, planetary, and galactic studies
  • Scientific Research and Discoveries
  • Black Holes and Theoretical Physics
  • Solar and Space Plasma Dynamics
  • Pregnancy and preeclampsia studies
  • Spectroscopy and Chemometric Analyses
  • Statistical and numerical algorithms
  • Traditional Chinese Medicine Analysis
  • Adipose Tissue and Metabolism
  • Advanced Vision and Imaging
  • Cancer-related molecular mechanisms research
  • Superconducting and THz Device Technology
  • Plant-based Medicinal Research
  • Astrophysical Phenomena and Observations

Shanghai Astronomical Observatory
2013-2024

Shanghai Jiao Tong University
2015-2024

Linyi People's Hospital
2024

Soochow University
2012-2024

First Affiliated Hospital of Soochow University
2015-2024

Shaanxi Provincial People's Hospital
2021-2024

Institute of Particle Physics
2016-2024

Ningbo University
2024

Shaanxi Provincial People's Hospital
2022-2024

Shanxi Medical University
2022-2024

The standard cosmology is based on general relativity (GR) and includes dark matter energy predicts a fixed relationship between the gravitational potentials responsible for lensing overdensity. Alternative theories of gravity often make different predictions. We propose set measurements which can test this relationship, thereby distinguishing or models in differs from GR. Planned surveys will be able to measure E(G), an observational quantity whose expectation value equal ratio Laplacian...

10.1103/physrevlett.99.141302 article EN Physical Review Letters 2007-10-04

A self-cleaning transparent pn junction in perovskite SrTiO3 QDs modified CuGaO2/Zn2SnO4 nanoarrays is prepared via the hydrothermal-solgel-surface plasma (SP) method. The CuGaO2/SrTiO3 QDs/Zn2SnO4 exhibits transmittance of ∼85%–90%, photovoltaic enhancement ∼1.8 × 103-folds (photovoltaic conversion efficiency ∼1.25%), stable output 5 months, and good hydrophobicity (contact angle ∼138.1°). main reasons are mainly attributed to SP modification; besides appropriate Fermi level high quantum...

10.1063/5.0220456 article EN Applied Physics Letters 2024-08-26

Modifications of general relativity provide an alternative explanation to dark energy for the observed acceleration Universe. Modified gravity theories have richer observational consequences large-scale structures than conventional models, in that different observables are not described by a single growth factor even linear regime. We examine relationships between perturbations metric potentials, density and velocity fields, discuss strategies measuring them using gravitational lensing,...

10.1103/physrevd.78.063503 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 2008-09-02

A generic prediction of general relativity is that the cosmological linear density growth factor $D$ scale independent. But in general, modified gravities do not preserve this signature. dependent can cause time variation gravitational potential at high redshifts and provides a new test gravity, through early integrated Sachs-Wolfe (ISW) effect-large structure (LSS) cross correlation. We demonstrate power for class $f(R)$ with form...

10.1103/physrevd.73.123504 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 2006-06-02

Future weak lensing measurements of cosmic shear will reach such high accuracy that second order effects in modeling, like the influence baryons on structure formation, become important. We use a controlled set state art cosmological simulations to quantify this effect by comparing pure N-body dark matter runs with corresponding hydrodynamical simulations, carried out both non-radiative, and dissipative form cooling star formation. In clustering gas is suppressed while boosted at scales...

10.1086/503547 article EN The Astrophysical Journal 2006-03-09

The Copernican principle, a cornerstone of modern cosmology, remains largely unproven at Gpc radial scale and above. Here we will show that, violations this type inevitably cause first order anisotropic kinetic Sunyaev Zel'dovich (kSZ) effect. If large inhomogeneities have amplitude enough to explain the "dark energy" phenomena, induced kSZ power spectrum be much larger than ACT/SPT upper limit. This single test confirms principle rules out adiabatic void model as viable alternative dark energy.

10.1103/physrevlett.107.041301 article EN publisher-specific-oa Physical Review Letters 2011-07-21

Dark energy interacting with dark matter is a promising model to solve the cosmic coincidence problem. We study signature of such interaction on large scale microwave background (CMB) temperature anisotropies. Based detail analysis in perturbation equations and when they are interaction, we find that CMB, especially late integrated Sachs-Wolfe effect, useful tool measure coupling between sectors. also discuss possibility detect by cross-correlating CMB maps tracers structure. finally perform...

10.1103/physrevd.80.063530 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 2009-09-24

Existing evidence suggest an association of cardiovascular health (CVH) level with cardiometabolic disease (CMD) and mortality, but the effect CVH on life expectancy, particularly survival years in CMD patients, has not been well-established. This study aimed to investigate defined using 7-item tool from American Heart Association (AHA) expectancy people without CMD.Between 2006 2010, a total 341,331 participants (age 37-73 years) UK Biobank were examined thereafter followed up 2020. The...

10.1016/j.eclinm.2022.101329 article EN cc-by-nc-nd EClinicalMedicine 2022-03-01

For cosmologically interesting $f(R)$ gravity models, we derive the complete set of linearized field equations in Newtonian gauge, under environments solar system, galaxies, and clusters, respectively. Based on these equations, confirm previous $\ensuremath{\gamma}=1/2$ solution system. However, models can be strongly environment dependent high density (comparing to cosmological mean) system excite a viable $\ensuremath{\gamma}=1$ for some models. Although...

10.1103/physrevd.76.024007 article EN Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 2007-07-13

We use 1-dimensional numerical simulations to study spherical collapse in the f(R) gravity models. include nonlinear coupling of gravitational potential scalar field theory and a relaxation scheme follow collapse. find an unusual enhancement density near virial radius which may provide observable tests gravity. also estimated time calculate critical overdensity $\delta_c$ used calculating mass function bias halos. that analytical approximations previously literature do not capture complexity

10.1103/physrevd.85.063518 article EN publisher-specific-oa Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 2012-03-23

The Five-Hundred-Meter Aperture Spherical Radio Telescope(FAST) is the largest single-dish radio telescope in world. In this paper, we make forecast on FAST HI large scale structure survey by mock observations. We consider a drift scan with L-band 19 beam receiver, which may be commensal pulsar search and Galactic survey. also surveys at lower frequency, either using current single feed wide band or future multi-beam phased array (PAF) UHF band. estimate number density of detected galaxies...

10.1093/mnras/staa650 article EN Monthly Notices of the Royal Astronomical Society 2020-03-06

Abstract AliCPT is the first Chinese cosmic microwave background (CMB) experiment which will make most precise measurements of CMB polarization in northern hemisphere. The key science goal for detection primordial gravitational waves (PGWs). It well known that an epoch inflation, very early universe, can produce PGWs, leave imprint on form odd parity B -mode polarization. In this work, we study performance component separation and parameter estimation pipelines context constraining value...

10.1088/1475-7516/2022/10/063 article EN Journal of Cosmology and Astroparticle Physics 2022-10-01

Hematoma clearance has been a proposed therapeutic strategy for hemorrhagic stroke. This study investigated the impact of CX3CR1 (CX3C chemokine receptor 1) activation mediated by r-FKN (recombinant fractalkine) on hematoma resolution, neuroinflammation, and underlying mechanisms involving AMPK (AMP-activated protein kinase)/PPARγ (peroxisome proliferator-activated gamma) pathway after experimental germinal matrix hemorrhage (GMH).A total 313 postnatal day 7 Sprague Dawley rat pups were...

10.1161/strokeaha.123.043005 article EN cc-by-nc-nd Stroke 2023-07-19

Abstract Observations of gravitational waves (GW) provide us with a new probe to study the Universe. GW events can be used as standard sirens if their redshifts are measured. Normally, divided into bright/dark according whether measured by electromagnetic (EM) counterpart observations. First, we investigate capability 2.5 m Wide-Field Survey Telescope (WFST) take follow-up observations kilonova counterparts. For binary neutron star (BNS) bright sirens, WFST is expected observe 10–20...

10.3847/1538-4365/ad0ece article EN cc-by The Astrophysical Journal Supplement Series 2024-01-22

The China Space Station Telescope (CSST) is a forthcoming space-based optical telescope designed to co-orbit with the Chinese Station. With planned slitless spectroscopic survey spanning broad wavelength range of $255-1000$nm and an average spectral resolution exceeding 200, CSST holds significant potential for cosmic large-scale structure analysis. In this study, we focus on redshift determinations from spectra through emission line analysis within framework. Our tailored measurement...

10.48550/arxiv.2502.11536 preprint EN arXiv (Cornell University) 2025-02-17

Studies indicate that the male environment and feeding patterns may impact offspring. In this study, a paternal high‐fat diet (HFD) model was established to investigate lipid metabolism of We found HFD‐F1 mice exhibited abnormal hepatic gluconeogenesis in intraperitoneal pyruvate tolerance test (IPPTT) increased deposition liver. Additionally, contents triglyceride (TG) low‐density lipoprotein cholesterol (LDL‐C) plasma liver tissues were significantly elevated mice. Transcriptome analysis...

10.1155/jfbc/8272754 article EN cc-by Journal of Food Biochemistry 2025-01-01

Abstract TA15 alloy billets were prepared by powder metallurgy-hot isostatic pressing, using 920°C, 120MPa, and a 3h holding time. Pre-alloyed powders plasma rotating electrode process, gas atomization, hydrogen dehydrogenation. The particle morphology, chemical composition, size distribution, microstructure of the different first characterized. Then, differences in mechanical properties three analyzed. results show HIP-P (tensile strength 956 MPa, elongation 16.5%) HIP-G 912 16.83%) have an...

10.1088/1742-6596/2956/1/012035 article EN Journal of Physics Conference Series 2025-03-01

Weak gravitational lensing provides a direct statistical measure of the dark matter distribution. The variance is easiest to measure, which constrains degenerate product σ_8Ω^0.6. degeneracy broken by measuring skewness arising from fact that densities must remain positive, not possible when initially symmetric perturbations become non-linear. Skewness measures non-linear mass scale, in combination with Ωdirectly. We present first detection Virmos-Decart survey. have measured full three...

10.1086/375734 article EN The Astrophysical Journal 2003-07-31
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