Results 41 to 50 of about 76,366 (278)

Generalized (edge-)connectivity of join, corona and cluster graphs

AIMS Mathematics, 2022
The generalized $ k $-connectivity $ \kappa_k(G) $ of a graph $ G $, introduced by Hager in 1985, is a natural generalization of the classical connectivity. As a natural counterpart, Li et al. proposed the concept of generalized $ k $-edge-connectivity $
Meiqin Wei , He Zhang, Zhao Wang, Yaping Mao   +3 more
doaj   +1 more source

The effects of native lactic acid bacteria on the microbiome, fermentation profile, and nutritive value of Napier grass silage prepared with different legume ratios

Frontiers in Microbiology, 2023
Mixing grass with legumes before ensiling is beneficial for improving dry matter and crude protein yield, but additional information is needed to balance nutrient content and fermentation quality.
Hao Guan, Haiping Li, Haiping Li, Li Gan, Shiyong Chen, Yanhong Yan, Zhifeng Jia, Wenhui Liu, Xiaoxing Wei, Xiang Ma, Qingping Zhou   +10 more
doaj   +1 more source

An accurate fringe extraction model of small- and medium-sized urban areas using multi-source data

Frontiers in Environmental Science, 2023
Urban fringes are of great significance to urban development as connecting hubs between urban and rural areas. However, there are many problems in urban fringes, including disorderly spatial layout, waste of social resources, and low quality of human ...
Jianfeng Li, Jianfeng Li, Jianfeng Li, Jianfeng Li, Biao Peng, Biao Peng, Siqi Liu, Siqi Liu, Huping Ye, Zhuoying Zhang, Zhuoying Zhang, Xiaowei Nie, Xiaowei Nie   +12 more
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The impact of peripheral circulation characteristics of typhoon on sustained ozone episodes over the Pearl River Delta region, China [PDF]

Atmospheric Chemistry and Physics, 2022
The peripheral circulation of typhoon forms sustained ozone episodes. However, how it impacts the day-to-day ozone pollution levels during the episodes has not been clearly studied, which is crucial for better prediction of the daily ozone variation.
Y. Li, Y. Li, X. Zhao, X. Zhao, X. Zhao, X. Deng, J. Gao, J. Gao, J. Gao   +8 more
doaj   +1 more source

An exact method for a discrete multiobjective linear fractional optimization [PDF]

, 2007
Integer linear fractional programming problem with multiple objective MOILFP is an important field of research and has not received as much attention as did multiple objective linear fractional programming.
Chergui, M. E-A, Moulai, M.
core   +2 more sources

A ninth-order first derivative method for numerical integration

Journal of Nigerian Society of Physical Sciences
In this paper, we present a ninth–order block hybrid method for the numerical solution of stiff and non–stiff systems of first–order differential equations.
Richard Akinola, Ezekiel Omole, Joshua Sunday, Stephen Kutchin   +3 more
doaj   +1 more source

Data-driven quantification of nitrogen enrichment impact on Northern Hemisphere plant biomass

Environmental Research Letters, 2022
The production of anthropogenic reactive nitrogen (N) has grown so much in the last century that quantifying the effect of N enrichment on plant growth has become a central question for carbon (C) cycle research.
Yongwen Liu, Shilong Piao, David Makowski, Philippe Ciais, Thomas Gasser, Jian Song, Shiqiang Wan, Josep Peñuelas, Ivan A Janssens   +8 more
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Solving hyperchaotic initial value problems using second derivative extended trapezoidal rule of the second kind blended with generalized backward differentiation formulae with variable step size

Recent Advances in Natural Sciences
This paper aims to evaluate the accuracy and performance of the second derivative block extended trapezoidal rule of the second kind, blended with generalized backward differentiation formulae using variable step sizes, in solving hyperchaotic initial ...
E. J. Onoja, U. W. Sirisena
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Analytical Solutions for Steady-State Multiwell Aquifer Tests in Rectangular Aquifers by Using Double Fourier Transform: A Case Study in the Ordos Plateau, China

Geofluids, 2020
Straightforward solutions have long been expected for the analysis of multiwell aquifer tests. In this paper, we derive series analytical solutions of steady-state groundwater flow in a rectangular-shaped aquifer with pumping/injection wells for both ...
Jun-Zhi Wang, Xu-Sheng Wang, Qing-Bo Li, Wei-Feng Wan   +3 more
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How the land use/cover changes and environmental factors at different scales affect lake water quality in arid and semi-arid regions

Frontiers in Ecology and Evolution, 2023
The quantitative relationship between land use/cover change (LUCC) within basins, lake water environmental factors, and water quality has long been a popular research area.
Xuhua Liu, Xuhua Liu, Huamin Liu, Huamin Liu, Huamin Liu, Jin Jing, Yang Liu, Zhichao Xu, Xiaoai Cao, Linqian Ma, Yi Zhuo, Yi Zhuo, Yi Zhuo, Lu Wen, Lu Wen, Lu Wen, Lixin Wang, Lixin Wang, Lixin Wang   +18 more
doaj   +1 more source