中国科学院机构知识库网格系统: 检索

Per-Packet Traffic Measurement in Storage, Computation and Bandwidth Limited Data Plane 期刊论文 OAI收割
IEEE-ACM TRANSACTIONS ON NETWORKING, 2024, 页码: 13
作者: Cong, Yinchuan; Xie, Kun; Wen, Jigang; Zhang, Jiwei; Yin, Yansong

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收藏 | 浏览/下载：4/0 | 提交时间：2024/12/06

Sequence of packet lengths and arrival times (SPLT) data plane packet level measurement in-network calculation quantization

Recovering Unbounded Rough Surfaces with a Direct Imaging Method 期刊论文 OAI收割
ACTA MATHEMATICAE APPLICATAE SINICA-ENGLISH SERIES, 2020, 卷号: 36, 期号: 1, 页码: 119-133
作者: Zhang, Hai-wen

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收藏 | 浏览/下载：28/0 | 提交时间：2020/05/24

direct imaging method inverse scattering problem unbounded rough surface incident plane wave near-field data

Timeslot Switching-Based Optical Bypass in Data Center for Intrarack Elephant Flow With an Ultrafast DPDK-Enabled Timeslot Allocator 期刊论文 OAI收割
JOURNAL OF LIGHTWAVE TECHNOLOGY, 2019, 卷号: 37, 期号: 10, 页码: 2253-2260
作者: Zhang, Yunquan; Shang, Yu; Guo, Bingli; Huang, Shanguo; Zhang, Yongjun

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收藏 | 浏览/下载：75/0 | 提交时间：2019/08/16

Data center network data plane development kit mouse flow and elephant flow optical timeslot switching timeslot allocation algorithm

Recovering scattering obstacles by multi-frequency phaseless far-field data 期刊论文 OAI收割
JOURNAL OF COMPUTATIONAL PHYSICS, 2017, 卷号: 345, 页码: 58-73
作者: Zhang, Bo; Zhang, Haiwen

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收藏 | 浏览/下载：30/0 | 提交时间：2018/07/30

Inverse obstacle scattering Phaseless far-field pattern Recursive Newton iteration method Recovery of obstacles Incident plane waves Multiple frequency data

Descent image based landing area terrain reconstruction technology for lunar landing mission 期刊论文 OAI收割
IMAGING SCIENCE JOURNAL, 2015, 卷号: 63, 期号: 8, 页码: 13711-13728
作者: Li, M.; Liu, S.; Ma, Y.; Sun, C.; Jia, Y.

收藏 | 浏览/下载：25/0 | 提交时间：2016/04/20

Descent images Data fusion Plane sweep 3D alignment

An auto-focus algorithm of fast search based on combining rough and fine adjustment (EI CONFERENCE) 会议论文 OAI收割
3rd international Conference on Manufacturing Science and Engineering, ICMSE 2012, March 27, 2012 - March 29, 2012, Xiamen, China
作者: Zhang S.; Zhang Y.

收藏 | 浏览/下载：26/0 | 提交时间：2013/03/25

A coarse and fine combined fast search and auto-focusing algorithm was suggested in this paper. This method can automatically search and find the focal plane by evaluating the image definition. The Krisch operator based edge energy function was used as the big-step coarse focusing and then the wavelet transform based image definition evaluation function which is sensitivity to the variation in image definition was used to realize the small-step fine focusing in a narrow range. The un-uniform sampling function of the focusing area selection used in this method greatly reduces the workload and the required time for the data processing. The experimental results indicate that this algorithm can satisfy the requirement of the optical measure equipment for the image focusing. (2012) Trans Tech Publications.

Precision detection of CCD splicing based on template matching algorithm (EI CONFERENCE) 会议论文 OAI收割
IEEE 2nd International Conference on Computing, Control and Industrial Engineering, CCIE 2011, August 20, 2011 - August 21, 2011, Wuhan, China
作者: Zhang X.; Zhang X.; Yang L.; Zhang X.; Yang L.

收藏 | 浏览/下载：32/0 | 提交时间：2013/03/25

The remote sensing camera in large field and wide cover needs CCD with enough pixels. But the existing CCD cannot satisfy the practical needs. Therefore several pieces of CCD which has insufficient pixels are spliced to get a long CCD array with plenty of pixels. The precision requirements of CCD splicing are very strict so that the same high accuracies are required in the precision detection of CCD splicing. When detecting precision of CCD splicing the graphical markers with simple geometric structure in the CCD package are selected as templates. The position precision data of the graphical markers in each CCD are obtained using the template matching algorithm. Using the unified objective templates the focal plane which has multi-chip of CCD is detected by template matching algorithm. Experiment results show that the template matching algorithm can enhance the located precision of each CCD to 0.347m. The splicing precision detection with template matching algorithm can avoid the subjective error caused by the conventional detection method. And its results are more accurate. In addition without manual intervention in the process of precision detection the efficiency of precision detection is improved. 2011 IEEE.

In situ long trace profiler for measurement of Wolter type-I mirror (EI CONFERENCE) 会议论文 OAI收割
Advances in Metrology for X-Ray and EUV Optics III, August 1, 2010 - August 2, 2010, San Diego, CA, United states
作者: Chen B.; Chen B.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

The surface profile of Wolter type-I mirror has a great impact on the performance of Solar X-ray Telescope. According to the existing fabrication instrument and experimental conditions in our lab an in situ Long Trace Profiler is developed and set up on the fabrication instrument in order to measure the surface profile of Wolter mirror in real time during fabrication process. Its working mechanism structural parameters and data processing algorithm are investigated. The prototype calibrated by a standard plane mirror is used to measure a sample of Wolter type-I mirror. The results show that our prototype can achieve an accuracy of 2.6rad rms for slope error with a stability of 1.33rad during the whole measurement period. This can meet further fabrication requirements. 2010 Copyright SPIE - The International Society for Optical Engineering.

Design of high-resolution fourier transform lens (EI CONFERENCE) 会议论文 OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China
作者: Zhang L.; Zhang L.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

With the development of optical information processing high-resolution Fourier transform lens has often been used in holographic data storage system spatial filtering and observation of particles. This paper studies the optical design method of high-resolution Fourier transform optical lenses system which could be used in particles observation and holographic data storage system. According to Fourier transform relation between object and its frequency plane and the theory of geometrical optics the system with working wavelength 532nm and resolution 3 m was designed based on ZEMAX. A multi-configuration method was adopted to optimize the system's lenses. In the optical system a diaphragm was placed at the system's spectrum plane and the system demanded a low vacuum to cut down the influences of atmosphere and other particles. The result of finite element analysis indicated that the influences of vacuum pumping to optics spacing and mirror surface shape very minor and the imaging quality not being affected. This system has many advantages such as simple structure good image quality and a high resolution of 3 m. So it has a wide application prospect and can be used both in holographic data storage system and particles observation.

Study of high speed photography measuring instrument (EI CONFERENCE) 会议论文 OAI收割
27th International Congress on High-Speed Photography and Photonics, September 17, 2006 - September 22, 2006, Xi'an, China
Zhang Z.; Sun J.; Wu K.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

High speed photograph measuring instrument is mainly used to measure and track the exterior ballistics which can measure the flying position of the missile in the initial phase and trajectory. A new high speed photograph measuring instrument is presented in this paper. High speed photography measuring system records the parameters of object real-time and then acquires the flying position and trajectory data of the missile in the initial phase. The detection distance of high speed photography is more than 4.5km and the least detection distance is 450m under the condition of well-balanced angular velocity and angular acceleration program pilot track error less than 5. This instrument also can measure and record the flying trail and trajectory parameters of plane aero naval missile.