机构

• 长春光学精密机械与物... [4]
• 力学研究所 [2]
• 生态环境研究中心 [2]
• 上海光学精密机械研究... [2]
• 数学与系统科学研究院 [1]

采集方式

• OAI收割 [11]

内容类型

• 会议论文 [6]
• 期刊论文 [5]

发表日期

• 2019 [2]
• 2014 [2]
• 2009 [1]
• 2007 [1]
• 2005 [2]
• 2002 [2]
• 更多

学科主题

筛选

浏览/检索结果: 共11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 Physical modelling of local scour at twin piles under combined waves and current 期刊论文  OAI收割 COASTAL ENGINEERING, 2019, 卷号: 143, 页码: 63-75 作者:  Qi WG(漆文刚);  Li YX;  Xu K;  Gao FP(高福平)   |  收藏  |  浏览/下载：52/0  |  提交时间：2019/04/11 Local scour  Twin piles  Pile-group  Skew angle  Horseshoe vortex  PIV technique  Combined waves and current  Time scale  Equivalent pile diameter   Characteristics of the horseshoe vortex at a cylindrical pile under a current and combined waves and current 会议论文  OAI收割 Honolulu, HI, United states, June 16, 2019 - June 21, 2019 作者:  Qi WG(漆文刚);  Xu K(徐凯);  Liu J(刘俊)   |  收藏  |  浏览/下载：16/0  |  提交时间：2020/11/20 Combined waves and current  Horseshoe vortex  PIV technique  Swirling strength   Combined-method for designing broadband dispersion mirror based on local optimization approach and needle optimization technique 期刊论文  OAI收割 optik, 2014, 卷号: 125, 期号: 3, 页码: 939 作者:  Wang, Yan-zhi;  Shao, Jian-da;  Wei, Chao-yang;  Yi, Kui;  Fan, Zheng-xiu 收藏  |  浏览/下载：21/0  |  提交时间：2016/11/28 Dispersion mirrors  Needle optimization technique  Local optimization approach  Combined-method  Group delay dispersion   Combined-method for designing broadband dispersion mirror based on local optimization approach and needle optimization technique 期刊论文  OAI收割 optik, 2014, 卷号: 125, 期号: 3, 页码: 939 作者:  Wang, Yan-zhi;  Shao, Jian-da;  Wei, Chao-yang;  Yi, Kui;  Fan, Zheng-xiu 收藏  |  浏览/下载：112/0  |  提交时间：2016/11/28 Dispersion mirrors  Needle optimization technique  Local optimization approach  Combined-method  Group delay dispersion   Test of an off-axis asphere by subaperture stitching interferometry (EI CONFERENCE) 会议论文  OAI收割 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 19, 2008 - November 21, 2008, Chengdu, China 作者:  Zheng L.-G. 收藏  |  浏览/下载：54/0  |  提交时间：2013/03/25 A new method combined subaperture stitching with interferometry(SSI) is introduced. It can test large and off-axis aspheric surfaces without the aid of other null optics. In this paper the basic principle and theory of the technique are analyzed. The synthetical optimization stitching model and effective stitching algorithm are established based on homogeneous coordinates transformation and simultaneous least-squares method. The software of SSI is devised and the prototype for testing of large aspheres by SSI is designed and developed. An off-axis asphere with the aperture of 376mm188mm is tested by this method. For comparison and validation  and the difference of PV and RMS error between them is 0.047 e and 0.006 e  the asphere is also tested by null compensation.The synthesized surface profile is consistent to that ofthe entire surface from null test  respectively. So it provides another quantitative measurement for testing large aspheric surfaces and off-axis aspheres besides null-compensation. 2009 SPIE.   Multi-mode combined manufacturing technology for large aperture aspheric mirrors (EI CONFERENCE) 会议论文  OAI收割 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Large Mirrors and Telescopes, July 8, 2007 - July 12, 2007, Chengdu, China 作者:  Li J.;  Xuan B.;  Li J.;  Li J. 收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25 In the field of manufacturing large aperture aspheric mirrors  mid-frequency surface error has been considered to be one of the most important factors for both manufacturing and testing technique. Mid-frequency surface error controlling the polishing process is not conventionally concerned as the same of controlling of low-frequency surface error. In order to solve such a problem  a new method - Multi-mode Combined Manufacturing (MCM) is put forward. MCM technology is useful for the control on all frequency-bands errors of optical surface and is adaptive to fast aspheric mirror especially. Based on classical manufacturing theory  principle analysis of MCM and experiments results are discussed in the paper.   The improving speed post-processing technique for blocking artifact in transform coded images (EI CONFERENCE) 会议论文  OAI收割 Seventh IASTED International Conference on Signal and Image Processing, SIP 2005, August 15, 2005 - August 17, 2005, Honolulu, HI, United states 作者:  Wang H.;  He B.;  Wang H.;  Wang H.;  Wang H. 收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25 Based on the technique [1] and the gradient continuity of natural image  an improving speed post-processing technique for the blocking artifact in transform coded image at low bit rate is presented. Moreover  the detecting function is applied to extract the adjacent two blocks with the blocking artifact and is combined with the DCT-based adaptive post-processing technique [1] for reducing the blocking artifacts of the decoded image. The new technique is used to process JPEG compressed image and results show improvement in both effective DCT operation and peak-signal to noise ratio (PSNR) with preserving the image quality.   Error analysis and test study of fiber optic gyroscope north-finder (EI CONFERENCE) 会议论文  OAI收割 Advanced Sensor Systems and Applications II, November 8, 2004 - November 12, 2004, Beijing, China Zhang Z.; Sun J.; Wu K. 收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25 North-finder system is an important application of the inertial technology. It provides true north azimuth information to f all kinds of ground-based equipment. This paper designed a dynamic automatic north-finder based on the modulation output of fiber optic gyroscope (FOG). In this scheme  the sine output signal of the FOG was sampled and disposed  and then the real north of surveyed point on the surface of earth was calculated. The deviation caused by the base tilt was compensated by an accelerator. The output signals of FOG and accelerator were computed combined with the position sampled from increasing encoder by digital signal processor. Successive rotating technique was adopted to modulate the FOG signal periodically. Most of the low frequency part of random gyro drift errors was compensated. The north-finder accuracy was improved compared with the traditional static measuring method. The test result shows the FOG automatic north-finder obtains 2' true north angle accuracies within not more than three minutes  can meet the orientation need of artillery  terrain measurement vehicle  armored car  unmanned drive vehicle  geodetic survey and tunnel exploration.   Photocatalytic detoxification of microcystins combined with ferrate pretreatment 会议论文  OAI收割 International Conference on Environmental Concerns and Emerging Abatement Technologies for Toxic Substances, BEIJING, PEOPLES R CHINA, OCT 09-12, 2001 作者:  Xing, H;  Yuan, BL;  Wang, YH;  Qu, JH 收藏  |  浏览/下载：15/0  |  提交时间：2016/01/15 photocatalysis  ferrate oxidation  combined technique  microcystin  water treatment   Photocatalytic detoxification of microcystins combined with ferrate pretreatment 期刊论文  OAI收割 JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING, 2002, 卷号: 37, 期号: 4, 页码: 641-649 作者:  Xing, H;  Yuan, BL;  Wang, YH;  Qu, JH 收藏  |  浏览/下载：19/0  |  提交时间：2015/11/19 photocatalysis  ferrate oxidation  combined technique  microcystin  water treatment