中国开放科研知识云: 检索

Investigation of the RCS for a finite bandpass frequency selective surface 会议论文
2018 International Applied Computational Electromagnetics Society Symposium in China, ACES-China 2018, 2018-07-29
作者: Fang, C.; Wang, Q.; Zhang, N.; Jiang, H.; Zhang, Y.

收藏 | 浏览/下载：6/0 | 提交时间：2019/12/30

Dielectric materials Frequency selective surfaces Different sizes Finite FSS Finite size Finite structures Frequency selective surface (FSS) Fringe-effects Plane wave illumination Quantitative relations Computational electromagnetics

Research on Influence of Geometric Adjustment on Performance of Variable Cycle Engine 会议论文
2018 2ND INTERNATIONAL CONFERENCE ON AEROSPACE TECHNOLOGY, COMMUNICATIONS AND ENERGY SYSTEMS (ATCES 2018), 2018-01-01
作者: Zhang, Binglong; Liu, Shuiming; Liu, He

收藏 | 浏览/下载：6/0 | 提交时间：2019/12/30

Engines Computation program Different effects Engine performance Mode selection Variable area Variable-cycle engines Work mode Bypass ratio

Interaction of flow & film-cooling effectiveness between double-jet film-cooling holes with various spanwise distances 会议论文
作者: Yao, Jiaxu; Xu, Jin; Zhang, Ke; Lei, Jiang; Wright, Lesley M.

收藏 | 浏览/下载：5/0 | 提交时间：2019/11/26

Different effects Film cooling Film cooling effectiveness Film cooling hole Inclination angles Pressure sensitive paints Seven-hole probe Spanwise distance

Effects of oil film properties on roller bearing with light loads under various slip factors 会议论文
作者: Li, Junning; Ma, Zhitao; Chen, Wei

收藏 | 浏览/下载：13/0 | 提交时间：2019/11/26

Combined actions Different effects Double slips General kinematics Oil film distribution Oil film thickness Radial loads Slip

The protective effects of insulin-like growth factor-1on different subpopulations of dorsal root ganglion neurons with neurotoxicity induced by gpl20 and dideoxycytidine in vitro 会议论文
作者: Huaxiang Liu; Yanwen Bi; Zhen Liu

收藏 | 浏览/下载：9/0 | 提交时间：2019/12/31

root DRG The protective effects of insulin-like growth factor-1on different subpopulations of dorsal root ganglion neurons with neurotoxicity induced by gpl20 and dideoxycytidine in vitro

A new method of time series piecewise linear representation 会议论文
Wuhan, China, March 15, 2013 - March 16, 2013
作者: Qiang, Wang

收藏 | 浏览/下载：105/0 | 提交时间：2020/11/15

Piecewise linear techniques Spot welding Data dynamics Different effects Hyperbolic tangent function Piecewise aggregate approximation Piecewise linear representation Query online Time properties

The research of digltal CR medicine image adapitive enhancement method (EI CONFERENCE) 会议论文
4th International Conference on Mechanical and Electrical Technology, ICMET 2012, July 24, 2012 - July 26, 2012, Kuala Lumpur, Malaysia
Ming-Hui Z.; Yao-Yu Z.

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Digital CR medicine radiation image is in doctor's favor and has became medicine imaging technology new hot spot because of its high gray contrast powerful computer disposal function little radiation dosage non-film diagnosis different area consultation. But degradation of digital X-ray medical image such as low contrast and blurring during radiographic imaging caused by complexity of body tissue and effects of X-ray scattering and electrical noise etc. can worsen the results of analysis and diagnosis. So it is usually needed that CR medicine image is enhanced to improve its vision quality and easy to doctor's more accurate diagnosis. The general enhancement algorithms over enhancing the contrast and lose image details aiming at the defects an enhancement algorithm for CR image is proposed based on the ratio of deviation to mean of domain. The arithmetic enhance CR image edge details by adjusting factor K based on the ratio of deviation to mean of domain of CR image. Experiment results demonstrate that the algorithm enhances CR image detail and CR image enhanced has good visual effect the adaptive enhancement method is fit for CR medicine image. (2012) Trans Tech Publications Switzerland.

Mechanical behavior of ultra-high performance concrete reinforced with hybrid different shapes of steel fiber 会议论文
CICTP 2012: Multimodal Transportation Systems - Convenient, Safe, Cost-Effective, Efficient - Proceedings of the 12th COTA International Conference of Transportation Professionals, 2012-08-03
作者: Ye, Y.; Hu, S.; Daio, B.; Yang, S.; Liu, Z.

收藏 | 浏览/下载：7/0 | 提交时间：2020/01/06

Different shapes Fiber volume Intermixing effects Mechanical behavior Plain concrete Steel fiber reinforced concretes Toughness index Ultra high performance concretes (UHPC) Ultra-fine fibers Ultra-high performance Volume ratio Compressive strength Cost effectiveness Ductility Fracture energy High performance concrete Mechanical engineering Multimodal transportation Reinforced concrete Steel fibers Bending strength

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

收藏 | 浏览/下载：96/0 | 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).

The nature of managerial ties in China 会议论文
作者: Wang, Qin; Gao, Shanxing

收藏 | 浏览/下载：2/0 | 提交时间：2019/12/10

Chinese manufacturing industries Different effects Emerging economies Environment factors Institutional theory Legitimacy Managerial ties Social capitals

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