نتایج جستجو برای: stand density index sdi
تعداد نتایج: 819852 فیلتر نتایج به سال:
A spatial data infrastructure (SDI) is a complex integrated network of spatial data producers, distributors and consumers that can be viewed as an extended geographic information enterprise. A way of gaining a better understanding of an SDI is to break it down into its constituent components so that individual SDI entities and their interactions can be analyzed. Prior SDI literature suggests an...
A Spatial Data Infrastructure (SDI) facilitates and coordinates the exchange and sharing of spatial data between stakeholders in the spatial data community. With this objective in mind, countries throughout the world are developing SDIs to manage and utilise their spatial data assets more effectively. These countries are developing SDIs to assist in various kinds of decision-making at different...
By analysis of performed spatial data infrastructures (SDIs) in developed countries, it is believed that one of the most important problems which obstacles the implementation of SDI’s objectives, is the lack of enough harmony in different parts. The solution given in management systems for more adaptability is using total quality management (TQM). In this paper, we compare SDI and TQM from adva...
Subsurface drip irrigation (SDI) can substantially reduce the amount of irrigation water needed for corn production. However, corn yields need to be improved to offset the initial cost of drip installation. Air-injection is at least potentially applicable to the (SDI) system. However, the vertical stream of emitted air moving above the emitter outlet directly toward the surface creates a chimne...
It is so important to apply suitable methods to have a reliable estimation of the spatial distribution of trees. This research was aimed to determine and evaluate the spatial pattern of five species by distance- and density-based indices (Quercus brantii, Acer moncepesulanum, Crataegus aronia, Pistacia atlantica & Amygdalus lycioides) in the Kalkhani Forest in Koudasht Lorestan province, Iran. ...
The International Cartographic Association (ICA) has proposed a formal model to describe Spatial Data Infrastructure (SDI) using three of the five viewpoints of the RM-ODP (Reference Model for Open Distributed Processing) framework, which was later adapted by other researchers. However, the adapted ICA model has not been validated for corporate-level SDI. The Companhia Energética de Minas Gerai...
The aim of this article is to present a concept of using airborne laser scanning (LIDAR), with one scan only, to map defoliation as a forest health variable. The idea is to apply two independent algorithms on the LIDAR data set, to produce both actual and expected leaf area index (LAI) values for every cell in a grid over the area. LAI is estimated based on laser pulse penetration through the c...
This study quantifies the sensitivity of surface runoff to drought and climate change in the Diyala watershed shared between Iraq and Iran. This was achieved through a combined use of a wide range of changes in the amount of precipitation (a decline between 0% and −40%) and in the potential evapotranspiration rate (an increase between 0% and +30%). The Medbasin-monthly rainfall-runoff model (Me...
BACKGROUND National levels of personal health-care access and quality can be approximated by measuring mortality rates from causes that should not be fatal in the presence of effective medical care (ie, amenable mortality). Previous analyses of mortality amenable to health care only focused on high-income countries and faced several methodological challenges. In the present analysis, we use the...
The hydrographic specifications of the karstic spring and the recession coefficient can reflect the hydro-climatic fluctuations and physical and geological characteristics of the aquifer system recharging the spring. In this study, in order to identify the hydrological geological behavior of Khorramabad Motahhari karstic Springhead (Sarab) during hydro-climatic fluctuations, quantitative analys...
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