机构

• 金属研究所 [6]
• 长春光学精密机械与物... [2]
• 高能物理研究所 [1]
• 上海光学精密机械研究... [1]

采集方式

• OAI收割 [10]

内容类型

• 期刊论文 [8]
• 会议论文 [2]

发表日期

• 2021 [1]
• 2011 [1]
• 2008 [2]
• 2003 [5]
• 2001 [1]

学科主题

筛选

浏览/检索结果: 共10条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Detection of Flare Multiperiodic Pulsations in Mid-ultraviolet Balmer Continuum, Lyl Hard X-Ray, and Radio Emissions Simultaneously 期刊论文  OAI收割 The Astrophysical Journal, 2021, 卷号: 921, 页码: 179 作者:  HXMT   |  收藏  |  浏览/下载：28/0  |  提交时间：2022/02/08 Solar flares  Solar oscillations  Solar ultraviolet emission  Solar  x-ray emission  Solar radio emission  1496  1515  1533  1536  1522  Astrophysics - Solar and Stellar Astrophysics  Abstract: Quasi-periodic pulsations (QPPs), which usually appear as temporal pulsations of the total flux, are frequently detected in the light curves of solar/stellar flares. In this study, we present the investigation of nonstationary QPPs with multiple periods during the impulsive phase of a powerful flare on 2017 September 6, which were simultaneously measured by the Hard X-ray Modulation Telescope (Insight-HXMT), as well as the ground-based BLENSW. The multiple periods, detected by applying a wavelet transform and Lomb-Scargle periodogram to the detrended light curves, are found to be ~20-55 s in the Ly`and mid-ultraviolet Balmer continuum emissions during the flare impulsive phase. Similar QPPs with multiple periods are also found in the hard X-ray emission and low-frequency radio emission. Our observations suggest that the flare QPPs could be related to nonthermal electrons accelerated by the repeated energy release process, i.e., triggering of repetitive magnetic reconnection, while the multiple periods might be modulated by the sausage oscillation of hot plasma loops. For the multiperiodic pulsations, other generation mechanisms could not be completely ruled out.   An appraisal method of dynamic interpolation error for high precision encoder (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China 作者:  Wan Q.-H.;  Liu C.-X.;  Liu C.-X. 收藏  |  浏览/下载：19/0  |  提交时间：2013/03/25 This paper introduces an appraisal method of the dynamic interpolation error for the high precision encoder (Lissajou pattern calculation method). When the encoder is rolling  two groups of fine photoelectric signals whose phase difference are /2 can be collected using data collected car. The shape and position deviation can be obtained through the comparison between Lissajou charts and the standard circle. Then dynamic interpolation error can be calculated out directly. This method is immune to the influence of encoder's speed and has no rigid demand to the test circumstances and test devices. The experimental results indicate that this method is feasible and important to the encoder's dynamic interpolation error checking. 2011 IEEE.   Driving techniques for high frame rate CCD camera (EI CONFERENCE) 会议论文  OAI收割 Electronic Imaging and Multimedia Technology V, November 12, 2007 - November 15, 2007, Beijing, China Guo W.; Jin L.; Xiong J. 收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25 This paper describes a high-frame rate CCD camera capable of operating at 100 frames/s. This camera utilizes Kodak KAI-0340  an interline transfer CCD with 640(vertical)480(horizontal) pixels. Two output ports are used to read out CCD data and pixel rates approaching 30 MHz. Because of its reduced effective opacity of vertical charge transfer registers  interline transfer CCD can cause undesired image artifacts  such as random white spots and smear generated in the registers. To increase frame rate  a kind of speed-up structure has been incorporated inside KAI-0340  then it is vulnerable to a vertical stripe effect. The phenomena which mentioned above may severely impair the image quality. To solve these problems  some electronic methods of eliminating these artifacts are adopted. Special clocking mode can dump the unwanted charge quickly  then the fast readout of the images  cleared of smear  follows immediately. Amplifier is used to sense and correct delay mismatch between the dual phase vertical clock pulses  the transition edges become close to coincident  so vertical stripes disappear. Results obtained with the CCD camera are shown.   Experimental demonstration of phase locking of a two-dimensional fiber laser array using a self-imaging resonator 期刊论文  OAI收割 appl. phys. lett., 2008, 卷号: 92, 期号: 25, 页码: 251115 He Bing; 楼祺洪; Wang Wei; 周军; Zheng Yinghui; 董景星; 魏运荣; 陈卫标 收藏  |  浏览/下载：1590/202  |  提交时间：2009/09/18 Beam profiling  Eigen modes  Fiber arrays  Fiber-laser arrays  In-phase  Out-of-phase  Phase locking  Power variations  Pump beams  Self-imaging  Spatial filtering   Thermo-mechanical fatigue behaviours of DD8 single crystal nickel base superalloy 期刊论文  OAI收割 ACTA METALLURGICA SINICA, 2003, 卷号: 39, 期号: 9, 页码: 903-907 作者:  Wang, YC;  Li, SX;  Ai, SH;  Liu, F;  Sun, XF   |  收藏  |  浏览/下载：8/0  |  提交时间：2021/02/02 single crystal nickel base superalloy  in phase  out of phase  thermo-mechanical fatigue (TMF)   Microstructures of DD8 single crystal nickel base superalloy after thermo-mechanical fatigue 期刊论文  OAI收割 ACTA METALLURGICA SINICA, 2003, 卷号: 39, 期号: 4, 页码: 337-341 作者:  Wang, YC;  Li, SX;  Ai, SH;  Liu, F;  Zhou, L   |  收藏  |  浏览/下载：9/0  |  提交时间：2021/02/02 single crystal nickel base superalloy  in phase  out of phase  thermo-mechanical fatigue  dislocation network   Microstructures of DD8 single crystal nickel base superalloy after thermo-mechanical fatigue 期刊论文  OAI收割 ACTA METALLURGICA SINICA, 2003, 卷号: 39, 期号: 4, 页码: 337-341 作者:  Wang, YC;  Li, SX;  Ai, SH;  Liu, F;  Zhou, L   |  收藏  |  浏览/下载：11/0  |  提交时间：2021/02/02 single crystal nickel base superalloy  in phase  out of phase  thermo-mechanical fatigue  dislocation network   Stacking fault in gamma ' precipitate of single crystal nickel base superalloy DD8 after out-of-phase thermomechanical fatigue 期刊论文  OAI收割 ACTA METALLURGICA SINICA, 2003, 卷号: 39, 期号: 2, 页码: 150-154 作者:  Wang, YC;  Li, SX;  Ai, SH;  Liu, F;  Zhou, L   |  收藏  |  浏览/下载：4/0  |  提交时间：2021/02/02 single crystal nickel base superalloy  out-of-phase  thermomechanical fatigue  stacking fault  gamma ' precipitate   Stacking fault in gamma ' precipitate of single crystal nickel base superalloy DD8 after out-of-phase thermomechanical fatigue 期刊论文  OAI收割 ACTA METALLURGICA SINICA, 2003, 卷号: 39, 期号: 2, 页码: 150-154 作者:  Wang, YC;  Li, SX;  Ai, SH;  Liu, F;  Zhou, L   |  收藏  |  浏览/下载：6/0  |  提交时间：2021/02/02 single crystal nickel base superalloy  out-of-phase  thermomechanical fatigue  stacking fault  gamma ' precipitate   Thermo-mechanical fatigue behavior of cast nickel-based superalloy K417 期刊论文  OAI收割 ACTA METALLURGICA SINICA, 2001, 卷号: 37, 期号: 3, 页码: 267-271 作者:  Liu, F;  Al, SH;  Wang, YC;  Zhang, H;  Wang, ZG   |  收藏  |  浏览/下载：14/0  |  提交时间：2021/02/02 cast nickel-base superalloy  thermo-mechanical fatigue  in-phase  out-of-phase