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Artificial objects usually have very stable shape features, which are stable, persistent properties in geometry. They can provide evidence for object recognition. Shape features are more stable and more distinguishing than appearance…

计算机视觉与模式识别 · 计算机科学 2023-06-27 Hui Wei , Fu-yu Tang

Cosmology with large interferometric telescopes is a rich and largely unexplored subject, involving three types of measurement: astrometric measurement of absolute distances and proper motions, dispersions of relative proper motions, and…

天体物理学 · 物理学 2007-05-23 David Tytler

We investigate the possibility to determine the fraction of compact objects in the Universe by studying gravitational lensing effects on Type Ia supernova observations. Using simulated data sets from one year of operation of the proposed…

天体物理学 · 物理学 2009-11-06 E. Moertsell , A. Goobar , L. Bergstrom

We propose a new method to search for light (pseudo-)scalar particles in the spectra of compact astrophysical objects such as magnetars, pulsars, and quasars. On accounts of compact astrophysical objects having intense magnetic fields…

天体物理学 · 物理学 2008-10-20 Doron Chelouche , Raul Rabadan , Sergey Pavlov , Francisco Castejon

Depth measures quantify central tendency in the analysis of statistical and geometric data. Selecting a depth measure that is simple and efficiently computable is often important, e.g., when calculating depth for multiple query points or…

计算几何 · 计算机科学 2024-11-12 Amirhossein Mashghdoust , Stephane Durocher

Manifold distances are very effective tools for visual object recognition. However, most of the traditional manifold distances between images are based on the pixel-level comparison and thus easily affected by image rotations and…

计算机视觉与模式识别 · 计算机科学 2016-05-13 Fengfu Li , Xiayuan Huang , Hong Qiao , Bo Zhang

If the Universe is endowed with cosmic anisotropy, it will have a preferred direction of expansion. Reconstructing the expansion history by Gaussian Process (GP) can be used to probe the cosmic anisotropy model-independently. In this paper,…

宇宙学与河外天体物理 · 物理学 2025-02-25 Zong-Fan Yang , Da-Wei Yao , Ke Wang

A novel object detection method is presented that handles freely rotated objects of arbitrary sizes, including tiny objects as small as $2\times 2$ pixels. Such tiny objects appear frequently in remotely sensed images, and present a…

计算机视觉与模式识别 · 计算机科学 2022-02-16 Mohsen Zand , Ali Etemad , Michael Greenspan

This work addresses models (e.g. potential models of directed orbital systems- the manganates) in which an effective reduction dimensionality occurs as a result of a new symmetry which is intermediate between that of global and local gauge…

统计力学 · 物理学 2007-05-23 Zohar Nussinov

Monocular 3D object detection is very challenging in autonomous driving due to the lack of depth information. This paper proposes a one-stage monocular 3D object detection algorithm based on multi-scale depth stratification, which uses the…

计算机视觉与模式识别 · 计算机科学 2022-04-29 Zhouzhen Xie , Yuying Song , Jingxuan Wu , Zecheng Li , Chunyi Song , Zhiwei Xu

Searching for compact objects (black holes, neutron stars, or white dwarfs) in the Milky Way is essential for understanding the stellar evolution history, the physics of compact objects, and the structure of our Galaxy. Compact objects in…

太阳与恒星天体物理 · 物理学 2022-09-29 Hui-Jun Mu , Wei-Min Gu , Tuan Yi , Ling-Lin Zheng , Hao Sou , Zhong-Rui Bai , Hao-Tong Zhang , Ya-Juan Lei , Cheng-Ming Li

In this paper, cosmic distance duality relation is probed without considering any background cosmological model. The only \textit{a priori} assumption is that the Universe is described by the Friedmann-Lema$\hat{i}$tre-Robertson-Walker…

广义相对论与量子宇宙学 · 物理学 2025-01-28 Savita Gahlaut

Intuition dictates that a very long, very thin cavity (e.g., a fiber optic cable) could perhaps be modeled as an approximately one dimensional system. In this paper we rigorously explore the validity of such intuition from the perspective…

量子物理 · 物理学 2021-10-07 Daniel Grimmer , Richard Lopp , Eduardo Martín-Martínez

In this paper, we propose a new method to use the strong lensing data sets to constrain a cosmological model. By taking the ratio…

宇宙学与河外天体物理 · 物理学 2013-09-05 Nannan Wang , Lixin Xu

Improving the detection of distant 3d objects is an important yet challenging task. For camera-based 3D perception, the annotation of 3d bounding relies heavily on LiDAR for accurate depth information. As such, the distance of annotation is…

计算机视觉与模式识别 · 计算机科学 2024-03-15 Zetong Yang , Zhiding Yu , Chris Choy , Renhao Wang , Anima Anandkumar , Jose M. Alvarez

We address the problem of weak approximation for general cubic hypersurfaces defined over number fields, with arbitrary singular locus. In particular, weak approximation is established for the smooth locus of projective, geometrically…

数论 · 数学 2011-11-18 Mike Swarbrick Jones

The problem of finding an appropriate geometrical/physical index for measuring a degree of inhomogeneity for a given space-time manifold is posed. Interrelations with the problem of understanding the gravitational/informational entropy are…

广义相对论与量子宇宙学 · 物理学 2007-05-23 Roustam Zalaletdinov

Objects with symmetries are common in our daily life and in industrial contexts, but are often ignored in the recent literature on 6D pose estimation from images. In this paper, we study in an analytical way the link between the symmetries…

计算机视觉与模式识别 · 计算机科学 2019-08-22 Giorgia Pitteri , Michaël Ramamonjisoa , Slobodan Ilic , Vincent Lepetit

Structure on sub-galactic scales provides important tests of galaxy formation models and the nature of dark matter. However, such objects are typically too faint to provide robust mass constraints. Here, we report the discovery of an…

宇宙学与河外天体物理 · 物理学 2025-10-10 D. M. Powell , J. P. McKean , S. Vegetti , C. Spingola , S. D. M. White , C. D. Fassnacht

Automatic multi-class object detection in remote sensing images in unconstrained scenarios is of high interest for several applications including traffic monitoring and disaster management. The huge variation in object scale, orientation,…

计算机视觉与模式识别 · 计算机科学 2018-11-02 Seyed Majid Azimi , Eleonora Vig , Reza Bahmanyar , Marco Körner , Peter Reinartz