中国科学院机构知识库网格系统: 检索

Progress of quantum molecular dynamics model and its applications in heavy ion collisions 期刊论文 OAI收割
FRONTIERS OF PHYSICS, 2020, 卷号: 15, 期号: 5, 页码: 64
作者: Zhang, Ying-Xun; Wang, Ning; Li, Qing-Feng; Ou, Li; Tian, Jun-Long

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quantum molecular dynamics model low energy heavy ion collisions low-intermediate energy heavy ion collisions fusion multinucleon transfer reaction multifragmentation collective flow isospin asymmetric equation of state in-medium nucleon-nucleon cross sections

Comparison of simulated backgrounds with in-orbit observations for HE, ME, and LE onboard Insight-HXMT 期刊论文 OAI收割
Astrophysics and Space Science, 2020, 卷号: 365, 页码: 158
作者: HXMT

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收藏 | 浏览/下载：49/0 | 提交时间：2022/02/08

Insight-HXMT Geant4 simulation Background observation Astrophysics - Instrumentation and Methods for Astrophysics Abstract: Insight-HXMT, the first X-ray astronomical satellite in China, aims to reveal new sources in the Galaxy and to study fundamental physics of X-ray binaries from 1 to 250 keV. It has three collimated telescopes, the High Energy X-ray telescope (HE), the Medium Energy X-ray telescope (ME), and the Low Energy X-ray telescope (LE). Before the launch, in-orbit backgrounds of these three telescopes had been estimated through Geant4 simulation, in order to investigate the instrument performance and the achievement of scientific goals. In this work, these simulated backgrounds are compared with in-orbit observations. Good agreements are shown for all three telescopes. For HE, (1) the deviation of the simulated background rate after two years of operation in space is 5 % from the observation (2) the total background spectrum and the relative abundance of the 67 keV line show long-term increases both in simulations and observations. For ME, (1) the deviation of simulated background rate is within 15 % from the observation, and (2) there are no obvious long-term increase features in the background spectra of simulations and observations. For LE, the background level given by simulations is also consistent with observations. The consistencies of these comparisons validate that the Insight-HXMT mass model, i.e., space environment components and models adopted, physics processes selected, and detector constructions built, is reasonable. However, the line features at 7.5 and 8.0 keV, which are obvious in the observed spectra of LE, are not evident in simulations. This might result from uncertainties in the LE constructions.

Palladium-Catalyzed Propargylic [n+2] Cycloaddition: An Efficient Strategy for Construction of Benzo-Fused Medium-Sized Heterocycles 期刊论文 OAI收割
ADVANCED SYNTHESIS & CATALYSIS, 2019, 卷号: 361, 期号: 4, 页码: 836-841
作者: Liu, Zhen-Ting; Hu, Xiang-Ping

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A regioselective palladium-catalyzed formal [n+2] cycloaddition of propargylic esters as C-2-synthons with various linker-tethered bisphenols for the construction of medium-sized heterocycles bearing an exocyclic double bond has been developed The reaction features mild conditions and broad substrate scopes as well as readily available substrates and catalysts Under optimal conditions various medium-sized heterocycles from eight to eleven-membered rings can be afforded in good to excellent yields and regioselectivities with high Z-selectivity for the exocyclic double bond palladium medium-sized ring propargylic ester bisphenol cycloaddition

Palladium-catalyzed propargylic [n+2] cycloaddition: an efficient strategy for construction of benzo-fused medium-sized heterocycles 期刊论文 iSwitch采集
Advanced synthesis & catalysis, 2019, 卷号: 361, 期号: 4, 页码: 836-841
作者: Liu, Zhen-Ting; Hu, Xiang-Ping

收藏 | 浏览/下载：91/0 | 提交时间：2019/05/08

A regioselective palladium-catalyzed formal [n+2] cycloaddition of propargylic esters as c-2-synthons with various linker-tethered bisphenols for the construction of medium-sized heterocycles bearing an exocyclic double bond has been developed The reaction features mild conditions and broad substrate scopes As well as readily available substrates and catalysts Under optimal conditions Various medium-sized heterocycles from eight to eleven-membered rings can be afforded in good to excellent yields and regioselectivities with high z-selectivity for the exocyclic double bond Palladium Medium-sized ring Propargylic ester Bisphenol Cycloaddition

In-orbit Demonstration of X-Ray Pulsar Navigation with the Insight-HXMT Satellite 期刊论文 OAI收割
The Astrophysical Journal Supplement Series, 2019, 卷号: 244, 页码: 1
作者: HXMT

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收藏 | 浏览/下载：14/0 | 提交时间：2022/02/08

pulsars: general techniques: miscellaneous Astrophysics - Instrumentation and Methods for Astrophysics Abstract: In this work, we report the in-orbit demonstration of X-ray pulsar navigation with Insight-Hard X-ray Modulation Telescope (Insight-HXMT) Satellite, which was launched on 2017 June 15. The new pulsar navigation method Significance Enhancement of Pulse-profile with Orbit-dynamics is adopted to determine the orbit with observations of only one pulsar. In this test, the Crab pulsar is chosen and observed by Insight-HXMT from 2017 August 31 to September 5. Using the five-day long observation data, the orbit of Insight-HXMT is determined successfully with the three telescopes onboard: High Energy X-ray Telescope, Medium Energy X-ray Telescope, and Low Energy X-ray Telescope, respectively. By combining all the data, the position and velocity of the Insight-HXMT are pinpointed to within 10 km (3ҩ and 10 m s^-1 (3ҩ, respectively.

Hydraulic fracturing process by using a modified two-dimensional particle flow code - case study 期刊论文 OAI收割
PROGRESS IN COMPUTATIONAL FLUID DYNAMICS, 2017, 卷号: 17, 期号: 1, 页码: 13-26
作者: Zhang, Luqing; Zhou, Jian; Han, Zhenhua

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收藏 | 浏览/下载：19/0 | 提交时间：2017/11/17

a Modified Pfc2d Model Isotropic Medium The Laminated Rock In-situ Stress Ratio Fluid Injection Rate Dip Angle Of Bedding Planes

Nuclear in-medium effects on eta dynamics in proton-nucleus collisions 期刊论文 OAI收割
NUCLEAR SCIENCE AND TECHNIQUES, 2016, 卷号: 27, 页码: 5
作者: Wang, Jian-Song; Feng, Zhao-Qing; Chen, Jie

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收藏 | 浏览/下载：28/0 | 提交时间：2018/05/31

LQMD model eta Production In-medium effects Proton-nucleus collisions

Nuclear in-medium effects on eta dynamics in proton-nucleus collisions 期刊论文 OAI收割
NUCLEAR SCIENCE AND TECHNIQUES, 2016, 卷号: 27, 期号: 3, 页码: 73
作者: Feng, ZQ (reprint author), Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China.; Chen, J; Feng, ZQ; Wang, JS; Feng, ZQ (reprint author), Chinese Acad Sci, Kavli Inst Theoret Phys, Beijing 100190, Peoples R China.

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收藏 | 浏览/下载：31/0 | 提交时间：2017/10/13

Lqmd Model Eta Production In-medium Effects Proton-nucleus Collisions

Suppression of Upsilon production in d plus Au and Au plus Au collisions at root S-NN=200 GeV 期刊论文 OAI收割
PHYSICS LETTERS B, 2014, 卷号: 735, 页码: 127-137
作者: Adamczyk, L.

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收藏 | 浏览/下载：27/0 | 提交时间：2018/07/05

Upsilon Suppression Quarkonium In-medium Relativistic Heavy-ion Collisions Star

INTERACTION OF VECTOR MESONS WITH BARYONS AND NUCLEI 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS, 2012, 卷号: 21, 期号: 11, 页码: 1230011
作者: Oset, E; Ramos, A; Garzon, EJ; Molina, R; Tolos, L

收藏 | 浏览/下载：31/0 | 提交时间：2016/04/08

Vector-baryon interaction vectors in medium J/psi suppression in nuclei