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• OAI收割 [12]
• iSwitch采集 [1]

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• 2023 [1]
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• Oceanograp... [2]

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浏览/检索结果: 共13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 Advancements in Buoy Wave Data Processing through the Application of the Sage-Husa Adaptive Kalman Filtering Algorithm 期刊论文  OAI收割 SENSORS, 2023, 卷号: 23, 期号: 16, 页码: 18 作者:  Jiang, Sha;  Chen, Yonghua;  Liu, Qingkui   |  收藏  |  浏览/下载：12/0  |  提交时间：2023/12/13 Sage-Husa adaptive kalman filter  combined filter  wave direction spectrum  acceleration sensor   Secure Dual-Functional Radar-Communication Transmission: Exploiting Interference for Resilience Against Target Eavesdropping 期刊论文  OAI收割 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2022, 卷号: 21, 期号: 9, 页码: 7238-7252 作者:  Su, Nanchi;  Liu, Fan;  Wei, Zhongxiang;  Liu, Ya-Feng;  Masouros, Christos   |  收藏  |  浏览/下载：28/0  |  提交时间：2023/02/07 Radar  Signal to noise ratio  Wireless communication  Copper  Security  Radar detection  Precoding  Dual-functional radar-communication system  millimeter-wave  physical layer security  direction modulation  constructive interference  fractional programming   Forces on a semi-submersible in internal solitary waves with different propagation directions 期刊论文  OAI收割 OCEAN ENGINEERING, 2020, 卷号: 217, 页码: 12 作者:  Chen, Min;  Chen, Jin;  You, Yun-Xiang   |  收藏  |  浏览/下载：23/0  |  提交时间：2021/10/25 Internal solitary wave (ISW)  Propagation direction  Semi-submersible  Inline forces  Transverse forces  Model tests   Enhanced performance of AlN SAW devices with wave propagation along the 〈11?20〉 direction on c-plane sapphire substrate 期刊论文  iSwitch采集 Journal of Physics D: Applied Physics, 2019, 卷号: 52, 期号: 21 作者:  Ai,Yujie;  Yang,Shuai;  Cheng,Zhe;  Zhang,Lian;  Jia,Lifang 收藏  |  浏览/下载：326/0  |  提交时间：2019/05/12 AlN film  surface acoustic wave  propagation direction  quality factor  insertion loss  elastic constant   A curvelet-based method to determine wave directions from nautical X-band radar images 期刊论文  OAI收割 ACTA OCEANOLOGICA SINICA, 2018, 卷号: 37, 期号: 1, 页码: 11-19 作者:  Zha, GZ;  He, QY;  Guan, CL;  Chen, JT   |  收藏  |  浏览/下载：25/0  |  提交时间：2018/09/03 X-band radar  wave direction  surface wave  curvelet transform   Data processing method of multi-position strap-down north seeking system based on SVD (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011, August 19, 2011 - August 22, 2011, Jilin, China Shen C.-W.; Liu C.; Yu S.-B.; Wang Z.-Q.; Li J.-R. 收藏  |  浏览/下载：34/0  |  提交时间：2013/03/25 With the aim to fit the sin wave curve of a multi-position strap-down north seeking system and to calculate the real north angle accurately  the principles of the system and the algorithm of singular value decomposition(SVD) are introduced. The factors influencing the measuring precision are also analyzed. Then  the algorithm is adopted to fit curves. Experimental results indicate that the singular value decomposition is very precise  for its error sum is 1.1102V  and the squared error is 2.8mV. Moreover  for phase angle measurement  measured six times in same direction  the squared error is 24 (1). The method based on SVD can satisfy the system precision requirements of curve-fitting north seeking systems. 2011 IEEE.   The Research of real time auto-recognition of the moire fringe (EI CONFERENCE) 会议论文  OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications, May 24, 2011 - May 26, 2011, Beijing, China Wang M.-J.; Wu Z.-G. 收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25 Measuring the movement of raster by the method of moire fringe has the advantage of high sensitivity  high resolution and non-contacted measurement. The characteristic of moire fringe is that the image is white alternate with black  the angle of the stripes is uniform  the width of the stripes is uniform  the terminators of the stripes aren't clear. A fast method that can figure out the width and angle of the moire fringe precisely is put forward in this paper. It calculates the angle the stripes firstly. According to the principle of the minimum mean squared error (MMSE)  the closer a series of data is  the smaller the value of the MMSE will be. The method is described as follows: It takes the image's center as the origin  180 beelines pass through the origin with the same angle interval. it calculates the value of the minimum mean squared error of the 180 beelines and find out the least one among those  then the angle of the moire fringe comes out primarily. In order to improving the calculating precision of moire fringe  60 equal angles are divided in the neighborhood of the angle  then a precise angle of moire fringe is calculated according to the principle of the MMSE. After getting out the angle of the moire fringe  we begin to calculate the width of moire fringe. A line vertical with the moire fringe is drawn  and we can get the width of the moire fringe by the vertical line. In order to get over the influence of the noise  an effective area with the shape of diamond is selected in the image. The data of area is accumulated and projected according to the direction of moire fringe  and a sine curve come out. The width of moire fringe can be obtained by getting the position of the first wave crest  the position of the last wave crest and the number of wave crest. Experiments prove that the precision of the method put forward in this paper is enhanced in comparison with the traditional frequency method  the precision of width calculation achieves to 99.6% according to the evaluation indicators of width detection error. The computing speed is boosted largely compared with traditional method  and it can achieve with 15 ms  that satisfying the demand of real time. 2011 SPIE.   Crust-mantle coupling in North China: Preliminary analysis from seismic anisotropy 期刊论文  OAI收割 CHINESE SCIENCE BULLETIN, 2010, 卷号: 55, 期号: 31, 页码: 3599-3605 作者:  Gao Yuan;  Wu Jing;  Yi GuiXi;  Shi YuTao   |  收藏  |  浏览/下载：12/0  |  提交时间：2018/09/26 Seismic Anisotropy  Crust-mantle Coupling  Polarization Direction Of Fast Shear-wave  Shear-wave Splitting  Crustal Principal Compressive Stress  North China   Crust-mantle coupling in North China: Preliminary analysis from seismic anisotropy 期刊论文  OAI收割 CHINESE SCIENCE BULLETIN, 2010, 卷号: 55, 期号: 31, 页码: 3599-3605 作者:  Gao Yuan;  Wu Jing;  Yi GuiXi;  Shi YuTao   |  收藏  |  浏览/下载：21/0  |  提交时间：2018/09/26 Seismic Anisotropy  Crust-mantle Coupling  Polarization Direction Of Fast Shear-wave  Shear-wave Splitting  Crustal Principal Compressive Stress  North China   Analysis of a diffractive microlens using the finite-difference time-domain method (EI CONFERENCE) 会议论文  OAI收割 作者:  Liu Y.;  Liu H.;  Liu H.;  Liu H.;  Liu Y. 收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25 The finite-difference time-domain (FDTD) method is used as rigorous electromagnetic analysis model to calculate the field for a diffractive microlens (DML). The FDTD is used for the entire solution rather than using a near- to far-field propagation method to obtain the far-field energy distribution  thus  all the results are vector based. We derived a formula to calculate the magnitude of electric field  which is time dependent and can be used to graphically show the light wave propagation and focusing process through a DML. Both the comparison and the integral methods are presented to obtain wave amplitude in full solution space  and the distribution of light energy behind a DML is illustrated based on the wave amplitude. The formula of diffractive efficiency of the DML is derived from a time-averaged Ponyting vector  which can indicate the propagation direction of light energy. Application of these formulations in the analysis of a DML example demonstrates the high accuracy and efficiency of our method. 2010 Society of Photo-Optical Instrumentation Engineers.