Results 71 to 80 of about 440,939 (238)

A local structural descriptor for image matching via normalized graph laplacian embedding [PDF]

, 2015
This paper investigates graph spectral approaches to the problem of point pattern matching. Specifically, we concentrate on the issue of how to effectively use graph spectral properties to characterize point patterns in the presence of positional jitter ...
Li, Xuelong, Lu, Ke, Shao, L, Shao, Ling, Tang, Jun   +4 more
core   +1 more source

Spatial and Temporal Distribution of Northwest Cape Transmitter (19.8 kHz) Radio Signals Using Data Collected by the China Seismo-Electromagnetic Satellite

Atmosphere, 2023
Very Low Frequency (VLF) waves radiated from ground-based transmitters are crucial for long-distance communication and underwater navigation. These waves can reflect between the Earth’s surface and the ionosphere for Earth–ionosphere waveguide ...
Honggeng Cai, Shufan Zhao, Li Liao, Xuhui Shen, Hengxin Lu   +4 more
doaj   +1 more source

Distance spectral radius of digraphs with given connectivity

Discrete Mathematics, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Lin, Huiqiu, Yang, Weihua, Zhang, Hailiang, Shu, Jinlong   +3 more
openaire   +2 more sources

Experimental study of bluntness effects on hypersonic boundary-layer transition over a slender cone using surface mounted pressure sensors

Advances in Aerodynamics, 2022
In this work, we studied the bluntness effect on the hypersonic boundary-layer transition over a slender cone at Mach 6 with interchangeable tips in a noisy Ludwieg tube tunnel before the so-called “transition reversal” phenomenon occurs.
Ranran Huang, Jiangyi Cheng, Jianqiang Chen, Xianxu Yuan, Jie Wu   +4 more
doaj   +1 more source

Optical spectroscopy of a brown dwarf candidate [PDF]

, 1998
We have used the Low-Resolution Imaging Spectrograph on the Keck II telescope to observe the brown dwarf candidate D04 (Hawkins et al, 1998). The spectrum matches that of a spectral-type M7 dwarf, implying a photospheric temperature of $\approx 2600$K ...
Burrows, I. N. Reid
core   +3 more sources

Simultaneous occurrence and compensating effects of multi‐type disorder in two‐dimensional photonic structures

Nano Select, 2023
Finite‐difference time‐domain (FDTD) simulations of the transmission spectra of planar small‐footprint photonic components with up to four types of morphological disorder as a materials parameter are performed with the aim to identify the individual ...
David Röhlig, Eduard Kuhn, Angela Thränhardt, Thomas Blaudeck   +3 more
doaj   +1 more source

NGC 3105: a young open cluster with low metallicity [PDF]

, 2018
NGC 3105 is a young open cluster hosting blue, yellow and red supergiants. This rare combination makes it an excellent laboratory to constrain evolutionary models of high-mass stars.
Alonso-Santiago, J., Castro, N., Marco, A., McBride, V. A., Negueruela, I., Rajoelimanana, A. F., Tabernero, H. M.   +6 more
core   +3 more sources

Spectral and Sharp Sufficient Conditions for Graphs to Admit a Strong Star Factor

Mathematics
LetGbe a graph. An odd [1,k]-factor of a graph G is a spanning subgraph H of G such that degH(v) is odd and 1⩽degH(v)⩽k for every v∈V(G) where k is a positive odd integer. We call a spanning subgraph H of a graph G a strong star factor if every component
Fengyun Ren, Shumin Zhang, He Li
doaj   +1 more source

On the distance Laplacian spectral radius of graphs

Linear Algebra and its Applications, 2015
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Lin, Hongying, Zhou, Bo
openaire   +1 more source

Towards an understanding of GRB prompt emission mechanism: I. The origin of spectral lags

, 2016
Despite decades of investigations, the physical mechanism that powers the bright prompt $\gamma$-ray emission from gamma-ray bursts (GRBs) is still not identified.
Uhm, Z. Lucas, Zhang, Bing
core   +1 more source