Results 11 to 20 of about 6,248,327 (201)

Uniform approximation for period-quadrupling bifurcations. [PDF]

open access: yes, 1997
. We derive a uniform approximation for semiclassical contributions of periodic orbits to the spectral density which is valid for generic period-quadrupling bifurcations in systems with a mixed phase space.
Henning Schomerus   +5 more
core   +4 more sources

Solar Angle Model for Daylight Redirection in Prismatic Panel

open access: yesJournal of Daylighting, 2022
An advanced complex fenestration system can utilize uniform daylight. Nonetheless, an inefficient design would increase solar heat gain and indoor temperatures, besides uneven light distribution that would cause the "cave effect." Prismatic panels are ...
Mahshid Amani Zanganeh   +1 more
doaj   +1 more source

Structural diversity of mixed beech stands in the middle stage of succession (Case study: Gorazbon District, Kheiroud Forest of Nowshahr) [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2014
To quantify the structural properties of mixed beech (Fagus orientalis) stand in the middle stage of succession, a study was carried out in the Kheiroud forest of Nowshahr in Mazandaran province.
Mehdi Kakavand   +3 more
doaj   +1 more source

The influence of sampling unit size and spatial arrangement patterns on neighborhood-based spatial structure analyses of forest stands

open access: yesForest Systems, 2016
Aim of the study: Neighborhood-based stand spatial structure parameters can quantify and characterize forest spatial structure effectively. How these neighborhood-based structure parameters are influenced by the selection of different numbers of nearest ...
Hongxinag Wang   +5 more
doaj   +1 more source

Close-to-nature management positively improves the spatial structure of Masson pine forest stands [PDF]

open access: yesWeb Ecology, 2021
Close-to-nature management (CTNM) has been proposed as a promising forestry management approach to improve the structure and quality of forests, which integrates wood production and ecological service functions.
X. Fang, W. Tan, X. Gao, Z. Chai
doaj   +1 more source

Quantifying the effect of non-spatial and spatial forest stand structure on rainfall partitioning in mountain forests, Southern China

open access: yesThe Forestry Chronicle, 2018
Forest stand structure plays an important role in rainfall interception and is a focal point in forest hydrology. Previous studies mainly looked at the effect of non-spatial attributes of stands while a few studies addressed the influence of spatial ...
Chunxia Liu   +5 more
doaj   +1 more source

Effect of management intervention on structure of natural stands (Case Study: Gorazbon District of Kheirud Forest) [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2017
Appropriate management of forest requires indices that can provide adequate information about forest structure condition and its changes with the least cost and time.
Mohsen Javanmiri Pour   +4 more
doaj   +1 more source

Selection priority for harvested trees according to stand structural indices

open access: yesiForest - Biogeosciences and Forestry, 2017
The selection of trees to be harvested is a core tenet of uneven-aged forest management; however, few studies have focused on the process of tree selection. A set of stand structural parameters (uniform angle index, W; mingling index, M; dominance index,
Li Y, Hui G, Wang H, Zhang G, Ye S
doaj   +1 more source

Habitat heterogeneity in karst environments influences the proportion and distribution of random framework

open access: yesEcological Indicators, 2022
In the absence of exogenous disturbance, natural forests usually display stable and orderly distribution patterns. Recent studies have demonstrated that the random framework (RF), based on the locations of four neighboring trees, remains stable in non ...
Yuanfa Li, Xiuqiong Luo, Jie Li
doaj   +1 more source

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