中国科学院机构知识库网格系统: 检索

Cembrane Diterpenes Possessing Nonaromatic Oxacycles from the Hainan Soft Coral Sarcophyton mililatensis 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, 2023, 卷号: 24, 期号: 3, 页码: 1979
作者: Zhang, Ling; Yang, Min; Chen, Zi-Hui; Ge, Zeng-Yue; Li, Song-Wei

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收藏 | 浏览/下载：20/0 | 提交时间：2024/03/27

soft coral Sarcophyton mililatensis cembrane diterpene absolute configuration TNF-alpha inhibitory binding mode

Measurement of molybdenum ion density for L-mode and H-mode plasma discharges in the EAST tokamak* 期刊论文 OAI收割
CHINESE PHYSICS B, 2020, 卷号: 29
作者: Shen, Yongcai; Zhang, Hongming; Lyu, Bo; Li, Yingying; Fu, Jia

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收藏 | 浏览/下载：73/0 | 提交时间：2020/10/26

SOFT-X-RAY SPECTROMETER ACCUMULATION IMPURITIES TRANSPORT BEHAVIOR EAST EUV spectroscopy molybdenum density L-mode and H-mode

Ab initio investigation of pressure-induced structural transitions and electronic evolution of Th3N4 期刊论文 OAI收割
HIGH PRESSURE RESEARCH, 2020, 卷号: 40, 期号: 2, 页码: 267-282
作者: Zhang, Y; Guo, YL; Liao, ZG; Liu, CD; Huai, P

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收藏 | 浏览/下载：64/0 | 提交时间：2021/09/06

TOTAL-ENERGY CALCULATIONS EQUATION-OF-STATE CRYSTAL-STRUCTURE SOFT-MODE PHASE FUNCTIONALS STABILITY OXIDATION NITRIDE

Constraining the X-Ray-Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154 with Palomar Gattini-IR 期刊论文 OAI收割
The Astrophysical Journal, 2020, 卷号: 901, 页码: L7
作者: HXMT

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收藏 | 浏览/下载：24/0 | 提交时间：2022/02/08

Radio transient sources Magnetars Soft gamma-ray repeaters 2008 992 1471 Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Instrumentation and Methods for Astrophysics Abstract: The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ?0.84 s with 99.9% observing efficiency. With a total observing time of ?12 hr (?47,728 images) during its 2020 outburst, we place median 3Ҡlimits on the second-timescale NIR fluence of ?18 Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125 Jy ms for an estimated extinction of A_J = 2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at 10¹⁴ Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to R_NIR ? 0.025 (fluence index ?0.35).

An analytical model for fracture initiation in elasto-plastic soft formations based on stress path analysis 期刊论文 OAI收割
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, 2019, 卷号: 176, 期号: 1, 页码: 906-925
作者: Wu, Shiguo; Sun, Jin; Deng, Jingen

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收藏 | 浏览/下载：70/0 | 提交时间：2019/04/22

Fracture Initiation Pressure Soft Formations Fracturing Mode Stress Path Tensile Fracturing Shear Fracturing

Observation of dual relaxation dynamics of polarization clusters in barium titanate by photon correlation spectroscopy 期刊论文 OAI收割
JAPANESE JOURNAL OF APPLIED PHYSICS, 2015, 卷号: 54, 期号: 4, 页码: —
作者: Zhang, MJ; Guo, Z; Tai, RZ; Luo, HS; Namikawa, K

收藏 | 浏览/下载：17/0 | 提交时间：2015/12/09

HYPER-RAMAN SCATTERING SOFT-MODE SPECTROSCOPY LIGHT-SCATTERING CUBIC BATIO3 RELAXOR FERROELECTRICS NEUTRON-SCATTERING CHAIN STRUCTURE ORDER-DISORDER DISPLACIVE TRANSITION

Nanoscale patterns made by using a 13.5-nm Schwarzschild objective and a laser produced plasma source (EI CONFERENCE) 会议论文 OAI收割
Optical Micro- and Nanometrology IV, April 16, 2012 - April 18, 2012, Brussels, Belgium
作者: Wang X.; Wang X.; Wang X.; Wang Z.; Wang Z.

收藏 | 浏览/下载：37/0 | 提交时间：2013/03/25

Lithium fluoride (LiF) crystal is a very promising candidate as nanometer resolution EUV and soft X-ray detector. Compared with other EUV and soft X-ray detectors charge coupled device and photographic films LiF crystal has high resolution large field of view and wide dynamic range. In this paper using LiF crystal as EUV detector and a Schwarzschild objective (SO) working at 13.5nm as projection optics mesh images with 4.2 m 1.2 m and 800 nm line width and pinhole patterns with 1.5m diameter are acquired in projection imaging mode and direct writing mode respectively. Fluorescence intensity profiles of images show that the resolution of mesh image is 900 nm and the one of pinhole image is 800 nm. In the experiments a spherical condense mirror based on normal incidence type is used to eliminate the damage and contamination on the masks (mesh and pinhole) caused by the laser plasma and the energy density is not decreased compared with that the masks are close to the plasma. The development of the SO the alignment of the objective and the imaging experiments are also reported. 2012 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Analysis of the disturbance of remote aerial detector induced by laser (EI CONFERENCE) 会议论文 OAI收割
High-Power Lasers and Applications III, November 8, 2004 - November 11, 2004, Beijing, China
作者: Zhou J.; Fu Y.; Guo J.; Guo J.

收藏 | 浏览/下载：42/0 | 提交时间：2013/03/25

It is important to study the interaction effect between laser and photoelectric detector. In most of the laser detecting systems laser must irradiate the photoelectric detector. The detector will be saturated or damaged easily if the fluence of the laser is higher than the saturation threshold of the detector. Now many photoelectric detectors are used in space. To achieve their interaction "Cat's eye" effect is applied to find and locate the remote aerial detector by laser. The possibility and mechanism of disturbance to remote aerial detector induced by laser are analyzed and the factors of influence are also analyzed. The fluence of laser on the photoactive area of remote aerial detector is estimated. With two samples of CCD and TV tracking system the mechanism of soft damage to CCD and TV tracking system induced by laser are introduced. The saturation of CCD and crosstalk of CCD are the main reasons of disturbance. When the tracking system is used in wave-door tracking mode it will lose its tracking target if the saturation or crosstalk of CCD can enter into wave-door. At last the influence to disturbance induced by atmosphere effect is also analyzed.

Nucleon-pair shell model: Magnetic excitations for Ba isotopes 期刊论文 OAI收割
COMMUNICATIONS IN THEORETICAL PHYSICS, 2002, 卷号: 37, 期号: 3, 页码: 331-334
作者: Luo, YA; Ning, PZ; Luo, YA , Nankai Univ, Inst Phys, Tianjin 300071, Peoples R China.

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收藏 | 浏览/下载：23/0 | 提交时间：2012/08/29

Mixed-symmetry States Gamma-soft Nucleus Electron-scattering Collective Motion Scissors Mode Ba-134

Magnetic excitations in the nucleon-pair shell model 期刊论文 OAI收割
PHYSICAL REVIEW C, 2001, 卷号: 64, 期号: 4, 页码: -
作者: Luo, YA , Nankai Univ, Inst Phys, Tianjin 300071, Peoples R China.; Luo, YA; Zhang, XB; Pan, F; Ning, PZ

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收藏 | 浏览/下载：22/0 | 提交时间：2012/08/29

Interacting Boson Model Mixed-symmetry States Gamma-soft Nucleus Deformed-nuclei Electron-scattering Collective States Scissors Mode Ba-134 Transitions Motion