中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共9条，第1-9条

帮助

条数/页：排序方式：
	Visualizing Planar and Space Implicit Real Algebraic Curves with Singularities 期刊论文 OAI收割 JOURNAL OF SYSTEMS SCIENCE & COMPLEXITY, 2020, 页码: 23 作者: Chen, Changbo; Wu, Wenyuan; Feng, Yong \| 收藏 \| 浏览/下载：40/0 \| 提交时间：2020/08/24 Continuation method critical point method real algebraic curve singularity
	Apparent singularities of D-finite systems 期刊论文 OAI收割 JOURNAL OF SYMBOLIC COMPUTATION, 2019, 卷号: 95, 页码: 217-237 作者: Chen, Shaoshi; Kauers, Manuel; Li, Ziming; Zhang, Yi \| 收藏 \| 浏览/下载：35/0 \| 提交时间：2020/01/10 D-finite system Grobner basis Ordinary point Formal power series Apparent singularity Desingularization
	The Application of Numerical Manifold Method to the Turning Point Singularity Problem in Seepage 会议论文 OAI收割 Guangzhou, PEOPLES R CHINA, MAR 25-25, 2017 作者: Feng, Qiang; Zhang, Weipeng \| 收藏 \| 浏览/下载：38/0 \| 提交时间：2018/06/05 numerical manifold method seepage turning point singularity
	Uncertainty and universality in the power-law singularity as a precursor of catastrophic rupture 期刊论文 OAI收割 SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY, 2012, 卷号: 55, 期号: 6, 页码: 1098-1102 作者: Jin Y(金渊); Xia MF(夏蒙棼); Wang HY(汪海英); Wang, HY 收藏 \| 浏览/下载：43/0 \| 提交时间：2013/01/18 uncertainty universality power-law singularity catastrophic rupture acoustic emission Shear Fracture Critical-Point Earthquakes Evolution Mechanics Solids Cannot Rock
	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：117/0 \| 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).
	REGULARITY AND GLOBAL STRUCTURE OF SOLUTIONS TO HAMILTON-JACOBI EQUATIONS II. CONVEX INITIAL DATA 期刊论文 OAI收割 JOURNAL OF HYPERBOLIC DIFFERENTIAL EQUATIONS, 2009, 卷号: 6, 期号: 4, 页码: 709-723 作者: Zhao, Yinchuan; Tang, Tao; Wang, Jinghua \| 收藏 \| 浏览/下载：19/0 \| 提交时间：2018/07/30 Hamilton-Jacobi equations Hopf's formula (II) global structure singularity point
	Regularity and global structure of solutions to Hamilton-Jacobi equations I. Convex Hamiltonians 期刊论文 OAI收割 JOURNAL OF HYPERBOLIC DIFFERENTIAL EQUATIONS, 2008, 卷号: 5, 期号: 3, 页码: 663-680 作者: Zhao, Yinchuan; Tang, Tao; Wang, Jinghua \| 收藏 \| 浏览/下载：22/0 \| 提交时间：2018/07/30 Hamilton-Jacobi equations Hopf's formula (I) global structure singularity point
	Existence and uniqueness of positive solution for Sturm-Liouville singular boundary value problem 期刊论文 OAI收割 INDIAN JOURNAL OF PURE & APPLIED MATHEMATICS, 2007, 卷号: 38, 期号: 1, 页码: 3-15 作者: Yu, Huimin; Lv, Haiyan; Liu, Yansheng \| 收藏 \| 浏览/下载：14/0 \| 提交时间：2018/07/30 singularity positive solution lower solution Schauder's fixed point theorem
	Angle-resolved photoemission study of Sr2RuO4 期刊论文 OAI收割 PHYSICAL REVIEW B, 1996, 卷号: 54, 期号: 18, 页码: 13311 Yokoya, T; Chainani, A; Takahashi, T; Ding, H; Campuzano, JC; KatayamaYoshida, H; Kasai, M; Tokura, Y 收藏 \| 浏览/下载：30/0 \| 提交时间：2014/02/20 SADDLE-POINT SINGULARITY BAND-STRUCTURE FERMI-SURFACE TRANSITION YBA2CU4O8 SR2IR1-XRUXO4 SPECTROSCOPY YBA2CU3O6.9