Results 21 to 30 of about 5,832,061 (187)

Testing surface area with arbitrary accuracy

, 2014
Recently, Kothari et al.\ gave an algorithm for testing the surface area of an arbitrary set $A \subset [0, 1]^n$. Specifically, they gave a randomized algorithm such that if $A$'s surface area is less than $S$ then the algorithm will accept with high ...
Bakry D., Federer H., Kothari P., Santaló L. A.   +3 more
core   +1 more source

Measuring and achieving moderate-scale operation of new agricultural business entities in hilly and mountainous areas: an empirical study on citrus, pepper, and grain farming in Chongqing's Jiangjin Modern Agricultural Park, China

Frontiers in Sustainable Food Systems
Moderate-scale agricultural operations are central to improving the quality and efficiency of modern regional agriculture and advancing agricultural modernization.
ShiChao Zhang, ShiChao Zhang, Xiang Zhang, XuanYun Zhang, ZhangYe Lu   +4 more
doaj   +1 more source

Exploring Manufacturing Process and Degradation Products of Gilt and Painted Leather

Applied Sciences, 2019
In this work, we studied the manufacturing processes and the conservation state of gilt and painted leather fragments from Palazzo Chigi in Ariccia (Italy) by using different analytical techniques.
Morena Iorio, Valerio Graziani, Sergio Lins, Stefano Ridolfi, Paolo Branchini, Andrea Fabbri, Gabriel Ingo, Gabriella Di Carlo, Luca Tortora   +8 more
doaj   +1 more source

Adsorption of water on the fine fractions of Finnish tills [PDF]

Bulletin of the Geological Society of Finland, 1986
This study deals with adsorption of water from the vapour phase on till samples at 25°C. The dry weights were determined after drying the samples in an oven at 105°C.
A. Kellomäki, P. Nieminen
doaj   +1 more source

Effect of Rock Strata Dip on Soil Detachment Capacity of Different Land Use Types in Karst Trough Valley Area

Shuitu Baochi Xuebao
[Objective] This study aimed to explore the influence mechanism of rock strata dip on soil erodibility and provide references for preventing and controlling water and soil erosion in karst trough valley area.
JIANG Lisha, GAN Fengling, TAN Xiaohong, SHI Hailong, ZHAO Xuan, PU Junbing   +5 more
doaj   +1 more source

The multidimensional development index of new agricultural business entities in mountainous and hilly areas based on the projection pursuit evaluation model: evidence from household survey data in the modern agricultural Park of Jiangjin district, Chongqing

Frontiers in Sustainable Food Systems
China’s gradual transition from traditional agriculture to modern agriculture has allowed land factors with comparative advantages in the countryside to be identified, which, in turn, has promoted the two-way flow of urban and rural resources, leading to
Shichao Zhang, Shichao Zhang, Xuanyun Zhang, Jingyu Liu, Xiang Zhang, Yang Liu   +5 more
doaj   +1 more source

Symplectic Floer homology of area-preserving surface diffeomorphisms

, 2010
The symplectic Floer homology HF_*(f) of a symplectomorphism f:S->S encodes data about the fixed points of f using counts of holomorphic cylinders in R x M_f, where M_f is the mapping torus of f.
Andrew Cotton-Clay, Casson, Cieliebak, Eftekhary, Eliashberg, Fel′shtyn, Floer, Floer, Gautschi, Jiang, Kronheimer, Lee, Lee, Lee, McDuff, Penner, Seidel, Seidel, Seidel, Taubes, Yau   +20 more
core   +1 more source

Exploring social-ecological system resilience in South China Karst: Quantification, interaction and policy implication

Geography and Sustainability
China’s Grain to Green Program (GTGP), which is one of the largest payments for ecosystem services (PES) in the world, has made significant ecological improvements to the environment.
Tiantian Chen, Yuxi Wang, Li Peng
doaj   +1 more source

Surface reconstruction, premelting, and collapse of open-cell nanoporous Cu via thermal annealing

, 2018
We systematic investigate the collapse of a set of open-cell nanoporous Cu (np-Cu) with the same porosity and shapes, but different specific surface area, during thermal annealing, via performing large-scale molecular dynamics simulations.
Deng, H. Q., Deng, L., Hu, W. Y., Tang, J. F., Wang, L., Xiao, S. F., Zhang, X. M.   +6 more
core   +1 more source

Integrating Aging-Friendly Strategies into Smart City Construction: Managing Vulnerability in Rural Mountainous Areas

Buildings
The vulnerability of older adults in rural mountainous regions presents a critical challenge for sustainable development, particularly in the context of smart city and digital town construction.
Kexin Chen, Yangyang Lei, Qian Liu, Jing’an Shao, Xinjun Yang   +4 more
doaj   +1 more source