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14,830 results on '"Hu, Bo"'

204. 3D mouse pose from single-view video and a new dataset

Author

Hu, Bo, Seybold, Bryan, Yang, Shan, Sud, Avneesh, Liu, Yi, Barron, Karla, Cha, Paulyn, Cosino, Marcelo, Karlsson, Ellie, Kite, Janessa, Kolumam, Ganesh, Preciado, Joseph, Zavala-Solorio, José, Zhang, Chunlian, Zhang, Xiaomeng, Voorbach, Martin, Tovcimak, Ann E., Ruby, J. Graham, and Ross, David A.

Published
2023
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221. Urbanization and physical activity in the global Prospective Urban and Rural Epidemiology study

Author

Boakye, Kwadwo, Bovbjerg, Marit, Schuna, Jr, John, Branscum, Adam, Varma, Ravi Prasad, Ismail, Rosnah, Barbarash, Olga, Dominguez, Juan, Altuntas, Yuksel, Anjana, Ranjit Mohan, Yusuf, Rita, Kelishadi, Roya, Lopez-Jaramillo, Patricio, Iqbal, Romaina, Serón, Pamela, Rosengren, Annika, Poirier, Paul, Lakshmi, P. V. M., Khatib, Rasha, Zatonska, Katarzyna, Hu, Bo, Yin, Lu, Wang, Chuangshi, Yeates, Karen, Chifamba, Jephat, Alhabib, Khalid F, Avezum, Álvaro, Dans, Antonio, Lear, Scott A, Yusuf, Salim, and Hystad, Perry

Published
2023
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225. The discovery of the largest gas filament in our Galaxy, or a new spiral arm?

Author

Li, Chong, Qiu, Keping, Hu, Bo, and Cao, Yue

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), we detect a giant HI filamentary structure in the sky region of 307$.\!\!^{\circ}$7 $<$ $\alpha$ $<$ 311$.\!\!^{\circ}$0 and 40$.\!\!^{\circ}$9 $<$ $\delta$ $<$ 43$.\!\!^{\circ}$4. The structure has a velocity range of $-$170 km s$^{-1}$ to $-$130 km s$^{-1}$, and a mean velocity of $-$150 km s$^{-1}$, putting it to a Galactocentric distance of 22 kpc. The HI structure has a length of 1.1 kpc, which appears to be so far the furthest and largest giant filament in the Galaxy and we name it Cattail. Its mass is calculated to be 6.5 $\times$ 10$^4$ M$_{\odot}$ and the linear mass density is 60 M$_{\odot}$ pc$^{-1}$. Its width is 207 pc, corresponding to an aspect ratio of 5:1. Cattail possesses a small velocity gradient (0.02 km s$^{-1}$ pc$^{-1}$) along its major axis. Together with the HI4PI data, we find that Cattail could have an even larger length, up to 5 kpc. We also identify another new elongated structure to be the extension into the Galactic first quadrant of the Outer Scutum-Centaurus (OSC) arm, and Cattail appears to be located far behind the OSC. The question about how such a huge filament is produced at the extreme Galactic location remains open. Alternatively, Cattail might be part of a new arm beyond the OSC, though it is puzzling that the structure does not fully follow the warp of the Galactic disk., Comment: 10 pages, 7 figures, Accepted for publication in ApJL

Published
2021
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226. Domain Generalization under Conditional and Label Shifts via Variational Bayesian Inference

Author

Liu, Xiaofeng, Hu, Bo, Jin, Linghao, Han, Xu, Xing, Fangxu, Ouyang, Jinsong, Lu, Jun, Fakhri, Georges EL, and Woo, Jonghye

Subjects
Computer Science - Machine Learning, Computer Science - Artificial Intelligence, Computer Science - Computer Vision and Pattern Recognition
Abstract

In this work, we propose a domain generalization (DG) approach to learn on several labeled source domains and transfer knowledge to a target domain that is inaccessible in training. Considering the inherent conditional and label shifts, we would expect the alignment of $p(x|y)$ and $p(y)$. However, the widely used domain invariant feature learning (IFL) methods relies on aligning the marginal concept shift w.r.t. $p(x)$, which rests on an unrealistic assumption that $p(y)$ is invariant across domains. We thereby propose a novel variational Bayesian inference framework to enforce the conditional distribution alignment w.r.t. $p(x|y)$ via the prior distribution matching in a latent space, which also takes the marginal label shift w.r.t. $p(y)$ into consideration with the posterior alignment. Extensive experiments on various benchmarks demonstrate that our framework is robust to the label shift and the cross-domain accuracy is significantly improved, thereby achieving superior performance over the conventional IFL counterparts., Comment: 30th International Joint Conference on Artificial Intelligence (IJCAI) 2021

Published
2021

227. Optical Mouse: 3D Mouse Pose From Single-View Video

Author

Hu, Bo, Seybold, Bryan, Yang, Shan, Ross, David, Sud, Avneesh, Ruby, Graham, and Liu, Yi

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

We present a method to infer the 3D pose of mice, including the limbs and feet, from monocular videos. Many human clinical conditions and their corresponding animal models result in abnormal motion, and accurately measuring 3D motion at scale offers insights into health. The 3D poses improve classification of health-related attributes over 2D representations. The inferred poses are accurate enough to estimate stride length even when the feet are mostly occluded. This method could be applied as part of a continuous monitoring system to non-invasively measure animal health.

Published
2021

228. Methods and Research Progress in Improving the Characteristic Mesh Structure of Hard Chromium Plating Layer

Author

HU Bo, YAN Xiaofeng

Subjects
chromium plating, mesh, microstructure, composite co-deposition, laser surface texture, Materials of engineering and construction. Mechanics of materials, TA401-492, Technology
Abstract

Due to its high hardness and low friction coefficient, hard chromium plating layer is commonly utilized to enhance the wear resistance of mechanical components, thereby prolonging their service life. However, the unique mesh structure of these layers detrimentally impacts air tightness and corrosion resistance, limiting their application scope. In this paper, methodology and current research for improving this mesh structure were comprehensively analyzed and summarized. The mesh structure of the chromium layer, which was affected by factors such as pretreatment, composition of electroplating solution, plating parameters, additives and flexible technology, was reviewed. The application of post-processing methods such as rolling, diamond ultra precision rolling and hole sealing, to improve the mesh structure in solving practical engineering problems was reviewed. The research progress on the preparation of reticulated composite chromium layers using co-deposition technology and the introduction of laser surface texture technology for the design of mesh microstructure of chromium plating layers was reviewed.

Published
2023
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