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We present here a method to estimate physical parameters of novae systems using an extensive grid of photoionization models for novae. We use the photoionization code CLOUDY to construct grid of models covering a wide range of different…

太阳与恒星天体物理 · 物理学 2018-11-19 Anindita Mondal , Ramkrishna Das , Gargi Shaw , Soumen Mondal

Difference image analysis (DIA) is a powerful tool for studying time-variable phenomena, and has been used by many time-domain surveys. Most DIA algorithms involve matching the spatially-varying PSF shape between science and template…

Accurate and robust localization is a fundamental need for mobile agents. Visual-inertial odometry (VIO) algorithms exploit the information from camera and inertial sensors to estimate position and translation. Recent deep learning based…

计算机视觉与模式识别 · 计算机科学 2022-09-20 Zheming Tu , Changhao Chen , Xianfei Pan , Ruochen Liu , Jiarui Cui , Jun Mao

Since Particulate Matters (PMs) are closely related to people's living and health, it has become one of the most important indicator of air quality monitoring around the world. But the existing sensor-based methods for PM monitoring have…

图像与视频处理 · 电气工程与系统科学 2020-04-07 Yonghui Zhang , Ke Gu

This paper presents a novel tightly coupled Filter-based monocular visual-inertial-wheel odometry (VIWO) system for ground robots, designed to deliver accurate and robust localization in long-term complex outdoor navigation scenarios. As an…

机器人学 · 计算机科学 2025-03-04 Zhixin Zhang , Wenzhi Bai , Liang Zhao , Pawel Ladosz

Particle Image Velocimetry (PIV) is the most commonly used optical technique for measuring 2D velocity fields. However, improving the spatial resolution of instantaneous velocity fields and having access to the velocity field in real time…

流体动力学 · 物理学 2024-07-04 Juan Pimienta , Jean-Luc Aider

In the theoretical modelling of a physical system a crucial step consists in the identification of those degrees of freedom that enable a synthetic, yet informative representation of it. While in some cases this selection can be carried out…

统计力学 · 物理学 2020-06-30 Marco Giulini , Roberto Menichetti , M. Scott Shell , Raffaello Potestio

Measurement of the velocity field in thermal-hydraulic experiments is of great importance for phenomena interpretation and code validation. Direct measurement employing Particle Image Velocimetry (PIV) is challenging in some multiphase…

流体动力学 · 物理学 2025-09-03 Xicheng Wang , YiMeng Chan , KinWing Wong , Dmitry Grishchenko , Pavel Kudinov

Photonic passbands have been derived for the uvby standard system by convolving the original filter passbands of Str\"omgren and Perry with atmospheric extinction and the QE of a cooled 1P21 photomultiplier tube. Using these new passbands,…

太阳与恒星天体物理 · 物理学 2015-06-03 Michael S. Bessell

A lot of work has been done to reach the best possible performance of predictive models on images. There are fewer studies about the resilience of these models when they are trained on image datasets that suffer modifications altering their…

计算机视觉与模式识别 · 计算机科学 2023-01-19 Pau Gallés , Katalin Takats , Javier Marin

Photoacoustic(PA) imaging is a non-destructive and non-invasive technology for visualizing minute blood vessel structures in the body using ultrasonic sensors. In PA imaging, the image quality of a single-shot image is poor, and it is…

计算机视觉与模式识别 · 计算机科学 2025-02-11 Tatsuhiro Eguchi , Shumpei Takezaki , Mihoko Shimano , Takayuki Yagi , Ryoma Bise

Optical Coherence Tomography (OCT) is a novel and effective screening tool for ophthalmic examination. Since collecting OCT images is relatively more expensive than fundus photographs, existing methods use multi-modal learning to complement…

图像与视频处理 · 电气工程与系统科学 2023-08-02 Lehan Wang , Weihang Dai , Mei Jin , Chubin Ou , Xiaomeng Li

Simplified, classical models of water are an integral part of atomistic molecular simulations, especially in biology and chemistry where hydration effects are critical. Yet, despite several decades of effort, these models are still far from…

化学物理 · 物理学 2015-01-13 Saeed Izadi , Ramu Anandakrishnan , Alexey V. Onufriev

The problem of effective use of Phasor Measurement Units (PMUs) to enhance power systems awareness and security is a topic of key interest. The central question to solve is how to use this new measurements to reconstruct the state of the…

系统与控制 · 电气工程与系统科学 2020-04-16 Alexey Bobtsov , Romeo Ortega , Nikolay Nikolaev , Johannes Schiffer , M. Nicolai L. Lorenz-Meyer

We introduce Metric3D v2, a geometric foundation model for zero-shot metric depth and surface normal estimation from a single image, which is crucial for metric 3D recovery. While depth and normal are geometrically related and highly…

计算机视觉与模式识别 · 计算机科学 2025-01-06 Mu Hu , Wei Yin , Chi Zhang , Zhipeng Cai , Xiaoxiao Long , Kaixuan Wang , Hao Chen , Gang Yu , Chunhua Shen , Shaojie Shen

We present extensive tables of bolometric corrections and interstellar extinction coefficients for the WFPC2 and ACS (both WFC and HRC) photometric systems. They are derived from synthetic photometry applied to a database of spectral energy…

This paper describes the accuracy and the errors of water vapour content measurements in the atmosphere using optical methods, especially starphotometer. After the general explanations of the used expressions for the star-magnitude…

大气与海洋物理 · 物理学 2010-10-19 V. D. Galkin , U. Leiterer , G. A. Alekseeva , V. V. Novikov , V. P. Pakhomov

Isomorphs are curves in the phase diagram along which a number of static and dynamic quantities are invariant in reduced units. A liquid has good isomorphs if and only if it is strongly correlating, i.e., the equilibrium virial/potential…

软凝聚态物质 · 物理学 2012-03-27 Trond S. Ingebrigtsen , Thomas B. Schrøder , Jeppe C. Dyre

We present PVO, a novel panoptic visual odometry framework to achieve more comprehensive modeling of the scene motion, geometry, and panoptic segmentation information. Our PVO models visual odometry (VO) and video panoptic segmentation…

计算机视觉与模式识别 · 计算机科学 2023-03-28 Weicai Ye , Xinyue Lan , Shuo Chen , Yuhang Ming , Xingyuan Yu , Hujun Bao , Zhaopeng Cui , Guofeng Zhang

Photometric stereo is a technique for estimating surface normals using images captured under varying illumination. However, conventional frame-based photometric stereo methods are limited in real-world applications due to their reliance on…

计算机视觉与模式识别 · 计算机科学 2026-03-24 Hyunwoo Kim , Won-Hoe Kim , Sanghoon Lee , Jianfei Cai , Giljoo Nam , Jae-Sang Hyun