Results 21 to 30 of about 20,325,694 (338)

Survey of Learned Index [PDF]

Jisuanji kexue, 2023
Due to the explosive growth of data in the era of big data,it is difficult for the traditional index structures to handle this huge and complex data.In order to solve this problem,the learned index has emerged and become one of the most popular research ...
WANG Yitan, WANG Yishu, YUAN Ye
doaj   +1 more source

Formation of fractal structure in many-body systems with attractive power-law potentials [PDF]

, 2005
We study the formation of fractal structure in one-dimensional many-body systems with attractive power-law potentials. Numerical analysis shows that the range of the index of the power for which fractal structure emerges is limited.
A. Fersht, A. Heck, Hiroko Koyama, J-L. Rouet, J. Binney, M. J. Lighthill, P. J. E. Peebles, S. Inagaki, Tetsuro Konishi   +8 more
core   +1 more source

Use of weather research and forecasting model outputs to obtain near-surface refractive index structure constant over the ocean.

Optics Express, 2016
The methods to obtain atmospheric refractive index structure constant (Cn2) by instrument measurement are limited spatially and temporally and they are more difficult and expensive over the ocean.
Chun Qing, Xiaoqing Wu, Xuebin Li, Wenyue Zhu, C. Qiao, R. Rao, Haiping Mei   +6 more
semanticscholar   +1 more source

Equivalent refractive-index structure constant of non-Kolmogorov turbulence.

Optics Express, 2015
The relationship between the non-Kolmogorov refractive-index structure constant and the Kolmogorov refractive-index structure constant is derived by using the refractive-index structure function and the variance of refractive-index fluctuations. It shows
Yu-Jie Li, Wenyue Zhu, Xiaoqing Wu, R. Rao   +3 more
semanticscholar   +1 more source

Forgotten topological index of chemical structure in drugs

Saudi Pharmaceutical Journal, 2016
A massive of early drug tests implies that there exist strong inner relationships between the bio-medical and pharmacology characteristics of drugs and their molecular structures.
Wei Gao, Muhammad Kamran Siddiqui, Muhammad Imran, Muhammad Kamran Jamil, Mohammad Reza Farahani   +4 more
doaj   +1 more source

Reduced tillage, but not organic matter input, increased nematode diversity and food web stability in European long‐term field experiments [PDF]

, 2019
Soil nematode communities and food web indices can inform about the complexity, nutrient flows and decomposition pathways of soil food webs, reflecting soil quality.
De Caceres M., De Goede R. G. M., Edgar R. C., Ferris H., Ferris H., Köppen W., Mekonen S., Minton N. A., Moura G. S., Neher D. A., Neher D. A., Neher D. A., Niles R. K., Oksanen J., Oostenbrink M., Pan F., Pinheiro J., R Development Core Team, RStudio Team, Toth G., Wang K.‐H., WRB, I. W. G., Yeates G. W.   +22 more
core   +1 more source

Flow structure and optical beam propagation in high-Reynolds-number gas-phase shear layers and jets [PDF]

, 2001
We report on the structure of the scalar index-of-refraction field generated by turbulent, gas-phase, incompressible and compressible shear layers and incompressible jets, and on associated beam-propagation aero-optical phenomena.
Catrakis, H. J., Dimotakis, P. E., Fourguette, D. C.   +2 more
core   +1 more source

A Narrow Groove Structure Based Plasmonic Refractive Index Sensor

IEEE Access, 2020
A refractive index (RI) sensor based on plastic optical fiber (POF) with narrow groove structures coated with a gold layer (POF-NGS (Au)) is proposed and demonstrated.
Yanjun Hu, Yulong Hou, Abdul Ghaffar, Wenyi Liu   +3 more
doaj   +1 more source

MESH FREE ESTIMATION OF THE STRUCTURE MODEL INDEX

Image Analysis and Stereology, 2011
The structure model index (SMI) is a means of subsuming the topology of a homogeneous random closed set under just one number, similar to the isoperimetric shape factors used for compact sets.
Joachim Ohser, Claudia Redenbach, Katja Schladitz   +2 more
doaj   +1 more source

A family of formulas with reversal of high avoidability index [PDF]

, 2016
We present an infinite family of formulas with reversal whose avoidability index is bounded between 4 and 5, and we show that several members of the family have avoidability index 5.
Currie, James, Mol, Lucas, Rampersad, Narad   +2 more
core   +2 more sources