中国科学院机构知识库网格系统: 检索

A speed measurement method for underwater robots using an artificial lateral line sensor 期刊论文 OAI收割
Smart Materials and Structures, 2021, 卷号: 31, 期号: 1
作者: Zhang,Zhuoliang; Zhou,Chao; Cao,Zhiqiang; Tan,Min; Cheng,Long

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收藏 | 浏览/下载：36/0 | 提交时间：2021/12/28

artificial lateral line speed of underwater robot hybrid loss function calibration in noisy environment flow sensor

Measurement methods of particle size distribution in emulsion polymerization 期刊论文 OAI收割
CHINESE JOURNAL OF CHEMICAL ENGINEERING, 2021, 卷号: 39, 页码: 1-15
作者: Zhang, Shuaifeng; Zhang, Qinghua; Shang, Jianzhuang; Mao, Zaisha; Yang, Chao

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收藏 | 浏览/下载：26/0 | 提交时间：2022/06/15

Particle size distribution Emulsion polymerization Off-line On-line In-line

An enhanced strategy integrating offline two-dimensional separation with data independent acquisition mode and deconvolution: Characterization of metabolites of Uncaria rhynchophylla in rat plasma as a case 期刊论文 OAI收割
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES, 2021, 卷号: 1181, 页码: 8
作者: Li, Haojv; Wei, Wenlong; Li, Zhenwei; Wang, Mengyuan; Wei, Xuemei

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收藏 | 浏览/下载：65/0 | 提交时间：2021/11/04

Off-line 2D separation system Metabolites characterization in vivo Data independent acquisition Multi-dimensional deconvolution Uncaria rhynchophylla

Time-domain analysis of vortex-induced vibration of a flexible mining riser transporting flow with various velocities and densities 期刊论文 OAI收割
OCEAN ENGINEERING, 2021, 卷号: 220, 页码: 18
作者: Duan JL(段金龙); Zhou JF(周济福); You, Yunxiang; Wang X(王旭)

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收藏 | 浏览/下载：35/0 | 提交时间：2021/03/30

Vortex-induced vibration Internal flow Time domain prediction method Coupling of in-line and cross-flow responses

Development of an In-Situ Laser Machining System Using a Three-Dimensional Galvanometer Scanner 期刊论文 OAI收割
ENGINEERING, 2020, 卷号: 6, 期号: 1, 页码: 68-76
作者: Li, Xiao; Liu, Bin; Mei, Xuesong; Wang, Wenjun; Wang, Xiaodong

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收藏 | 浏览/下载：43/0 | 提交时间：2020/03/11

In-situ laser machining Three-dimensional galvanometer scanner Line structured light Three-dimensional measurement

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：22/0 | 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).

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：48/0 | 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.

Twin image reduction method for digital in-line holography by using a digital periphery 期刊论文 OAI收割
Optik, 2019, 卷号: 193
作者: Li, Fanxing; Yan, Wei; Tian, Peng; Yang, Fan; Peng, Fuping

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收藏 | 浏览/下载：23/0 | 提交时间：2021/05/06

Digital in-line holography Digital periphery Diffuser Phase retrieval algorithm

Constant cyclotron line energy in Hercules X-1 - Joint Insight-HXMT and NuSTAR observations 期刊论文 OAI收割
Journal of High Energy Astrophysics, 2019, 卷号: 23, 页码: 29-32
作者: HXMT

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收藏 | 浏览/下载：48/0 | 提交时间：2022/02/08

Stars: neutron star Pulsars: binary(Her X-1) X-rays: stars Astrophysics - High Energy Astrophysical Phenomena Abstract: The long-term evolution of the centroid energy of the CRSF in Her X-1 is still a mystery. We report a new measurement from a campaign between Insight-HXMT and NuSTAR performed in February 2018. Generally, the two satellites show well consistent results of timing and spectral properties. The joint spectral analysis confirms that the previously observed long decay phase has ended, and that the line energy instead keeps constant around 37.5 keV after flux correction.

Lensless In-line Holographic Microscope Resolution Enhancement Method From Two Intensity Measurements Based On Data Interpolation 会议论文 OAI收割
Chengdu, PEOPLES R CHINAChengdu, PEOPLES R CHINA, JUN 26-29, 2018JUN 26-29, 2018
作者: Li, Fanxing; Tian, Peng; Yan, Wei; Yang, Fan; Peng, Fuping

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收藏 | 浏览/下载：31/0 | 提交时间：2019/08/23

Digital in-line holography data interpolation phase retrieval algorithm positive absorption property