中国科学院机构知识库网格系统: 检索

Numerical study of turbulent flow past a rotating axial-flow pump based on a level-set immersed boundary method 期刊论文 OAI收割
RENEWABLE ENERGY, 2021, 卷号: 168, 页码: 960-971
作者: Kan, Kan; Yang ZX(杨子轩); Lyu, Pin; Zheng, Yuan; Shen, Lian

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收藏 | 浏览/下载：35/0 | 提交时间：2021/03/30

Axial-flow pump Large-eddy simulation Immersed boundary method Level set function Turbulent kinetic energy Flow separation

Recovery of Collided RFID Tags With Frequency Drift on Physical Layer 期刊论文 OAI收割
IEEE/CAA Journal of Automatica Sinica, 2020, 卷号: 7, 期号: 6, 页码: 1593-1603
作者: Junzhi Li; Haifeng Wu; Yu Zeng

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收藏 | 浏览/下载：32/0 | 提交时间：2021/03/11

Frequency drift radial basis function (RBF) radio frequency identification (RFID) separation efficiency tag collision

Theoretical insights into selective separation of trivalent actinide and lanthanide by ester and amide ligands based on phenanthroline skeleton 期刊论文 OAI收割
DALTON TRANSACTIONS, 2020, 卷号: 49, 期号: 13, 页码: 4093-4099
作者: Wang, Cui; Wu, Qun-Yan; Wang, Cong-Zhi; Lan, Jian-Hui; Nie, Chang-Ming

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收藏 | 浏览/下载：40/0 | 提交时间：2020/12/16

SEGMENTED CONTRACTION SCHEME DENSITY-FUNCTIONAL THEORY MINOR ACTINIDES AM(III)/EU(III) SELECTIVITY EXTRACTION SEPARATION WAVE-FUNCTION F-ELEMENTS COMPLEXATION ENERGY DESIGN

Theoretical Insights into the Selective Extraction of Americium(III) over Europium(III) with Dithioamide-Based Ligands 期刊论文 OAI收割
INORGANIC CHEMISTRY, 2019, 卷号: 58, 期号: 15, 页码: 10047-10056
作者: Wang, Cui; Wu, Qun-Yan; Kong, Xiang-He; Wang, Cong-Zhi; Lan, Jian-Hui

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收藏 | 浏览/下载：42/0 | 提交时间：2019/12/18

SEGMENTED CONTRACTION SCHEME TRIVALENT ACTINIDES ELECTRONIC-STRUCTURE URANIUM COMPLEXES WAVE-FUNCTION SEPARATION LANTHANIDE ENERGY METAL ACID

CSMA/CQ: A Novel SDN-Based Design to Enable Concurrent Execution of Channel Contention and Data Transmission in IEEE 802.11 Networks 期刊论文 OAI收割
IEEE ACCESS, 2017, 卷号: 5, 页码: 2534-2549
作者: Zhao, Qinglin; Xu, Fangxin; Yang, Jie; Zhang, Yujun

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收藏 | 浏览/下载：34/0 | 提交时间：2019/12/12

OFDM software-defined wireless networks function separation 802.11

Structural and Permeation Kinetic Correlations in PdCuAg Membranes 期刊论文 OAI收割
acs applied materials & interfaces, 2014, 卷号: 6, 期号: 24, 页码: 22408-22416
作者: Zhao, Lingfang; Goldbach, Andreas; Bao, Chun; Xu, Hengyong

收藏 | 浏览/下载：127/0 | 提交时间：2015/11/16

hydrogen separation ternary alloy Vegard's law kinetic compensation structure-function relationship

A new water-sediment separation structure for debris flow defense and its model test 期刊论文 OAI收割
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, 2014, 卷号: 73, 期号: 4, 页码: 947-958
作者: Xie, Tao; Yang, Hongjuan; Wei, Fangqiang

收藏 | 浏览/下载：42/0 | 提交时间：2014/12/15

Debris flow Water-sediment separation structure Water-sediment separation function Test model Debris flow prevention

The design of computer-generated holograms for testing unsymmetrical optical surfaces (EI CONFERENCE) 会议论文 OAI收割
2012 International Symposium on Photonics and Optoelectronics, SOPO 2012, May 21, 2012 - May 23, 2012, Shanghai, China
作者: Zhang X.; Zhang Y.; Zhang X.

收藏 | 浏览/下载：28/0 | 提交时间：2013/03/25

It is a technical difficulty to test the unsymmtrical optical surfaces in non-contact methods. But we can do it using computer-generated holograms (CGH). The principle and design of the CGH have been discussed in the paper. Take the cubic suface as an example The order separation of the CGH is analyzed theoretically and the simulation result of the order separation is given in the paper. We develop the binary process of the continuous CGH phase function and get the sample of the amplitude CGH. A CGH for testing a cubic phase plate with duty cycle 0.5 is fabricated by using e-beam lithographic techniques. In this situation the contrast of the interference fringe pattern can achieve a level of 99.4% by calculation. 2012 IEEE.

The optical design of cubic phase plate testing system (EI CONFERENCE) 会议论文 OAI收割
2011 Symposium on Photonics and Optoelectronics, SOPO 2011, May 16, 2011 - May 18, 2011, Wuhan, China
作者: Zhang X.; Zhang X.; Zhang X.; Zhang Y.

收藏 | 浏览/下载：21/0 | 提交时间：2013/03/25

Computer-generated holograms (CGH) have been widely used for years in optical testing of aspheric surfaces in combination with Fizeau interferometers. With the development of diffraction optics computer technology and micro-processing technology the accuracy of the CGH testing can achieve a hundredth of a wave and the cost is reduced greatly. CGH is capable of producing an optical wavefront with any desired shape. So it is fascinating and will have good prospects to test free-form surfaces using CGH. As the CGH can create any wavefront shape it can also be used in unsymmetrical aspherical surfaces testing. Taking the cubic surface as an example this paper gives a method to test unsymmetrical surfaces. This paper gives the design to test a cubic surface. And the separation of the diffraction orders and the binary process of the continuous CGH phase function are discussed in detail. The alignment tolerance of the test system and the CGH fabrication tolerance are analyzed. We also present an idea using a CGH and two spherical lenses as null lens to test the cubic surface when the surface deviation is great. 2011 IEEE.

Research on infrared dim-point target detection and tracking under sea-sky-line complex background (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
作者: Dong Y.-X.; Zhang H.-B.; Li Y.; Li Y.; Li Y.

收藏 | 浏览/下载：114/0 | 提交时间：2013/03/25

Target detection and tracking technology in infrared image is an important part of modern military defense system. Infrared dim-point targets detection and recognition under complex background is a difficulty and important strategic value and challenging research topic. The main objects that carrier-borne infrared vigilance system detected are sea-skimming aircrafts and missiles. Due to the characteristics of wide field of view of vigilance system the target is usually under the sea clutter. Detection and recognition of the target will be taken great difficulties.There are some traditional point target detection algorithms such as adaptive background prediction detecting method. When background has dispersion-decreasing structure the traditional target detection algorithms would be more useful. But when the background has large gray gradient such as sea-sky-line sea waves etc.The bigger false-alarm rate will be taken in these local area.It could not obtain satisfactory results. Because dim-point target itself does not have obvious geometry or texture feature in our opinion from the perspective of mathematics the detection of dim-point targets in image is about singular function analysis.And from the perspective image processing analysis the judgment of isolated singularity in the image is key problem. The foregoing points for dim-point targets detection its essence is a separation of target and background of different singularity characteristics.The image from infrared sensor usually accompanied by different kinds of noise. These external noises could be caused by the complicated background or from the sensor itself. The noise might affect target detection and tracking. Therefore the purpose of the image preprocessing is to reduce the effects from noise also to raise the SNR of image and to increase the contrast of target and background. According to the low sea-skimming infrared flying small target characteristics the median filter is used to eliminate noise improve signal-to-noise ratio then the multi-point multi-storey vertical Sobel algorithm will be used to detect the sea-sky-line so that we can segment sea and sky in the image. Finally using centroid tracking method to capture and trace target. This method has been successfully used to trace target under the sea-sky complex background. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).