نتایج جستجو برای: using shannons entropy and random forest models

تعداد نتایج: 17470755  

Journal: Pollution 2020

This study aims to examine the ability of free floating aquatic plants to remove phosphorus and to predict the reduction of phosphorus from rice mill wastewater using soft computing techniques. A mesocosm study was conducted at the mill premises under normal conditions, and reliable results were obtained. Four aquatic plants, namely water hyacinth, water lettuce, salvinia, and duckweed were use...

Journal: :Journal of Machine Learning Research 2006
Nicolai Meinshausen

Abstract Random Forests were introduced as a Machine Learning tool in Breiman (2001) and have since proven to be very popular and powerful for high-dimensional regression and classification. For regression, Random Forests give an accurate approximation of the conditional mean of a response variable. It is shown here that Random Forests provide information about the full conditional distribution...

Journal: :OJBD 2015
Yuezhe Li Yuchou Chang Hong Lin

In this article, we discuss how to use a variety of machine learning methods, e.g. tree bagging, random forest, boost, support vector machine, and Gaussian mixture model, for building classifiers for electroencephalogram (EEG) data, which is collected from different brain states on different subjects. Also, we discuss how training data size influences misclassification rate. Moreover, the numbe...

Journal: :Remote Sensing 2017
Kaili Liu Jindi Wang Weisheng Zeng Jinling Song

Medium spatial resolution biomass is a crucial link from the plot to regional and global scales. Although remote-sensing data-based methods have become a primary approach in estimating forest above ground biomass (AGB), many difficulties remain in data resources and prediction approaches. Each kind of sensor type and prediction method has its own merits and limitations. To select the proper est...

2016
Catarina Barata M. Emre Celebi Jorge Marques

This paper proposes a two-step approach for the analysis of dermoscopy images. In the first step, we detected dermoscopic criteria (structures and colors), which are used by dermatologists in their medical analysis. In the second step, this information is used to automatically diagnose skin cancer. The extraction of dermoscopic criteria from skin lesions is a challenging task because the amount...

ژورنال: اقتصاد مقداری 2015

An economic system is comprised of different primary flows that can be captured in macroeconomic models with complex network relations. Theoretically and empirically in this system, weak substitution or complementarity of environmental materials, like energy and other production factors such as capital, is undeniable. This is an effective critique on neoclassical economics. In this paper, we vi...

Journal: :محیط زیست طبیعی 0
وحید علی جانی دانشجوی کارشناسی ارشد گروه جنگلداری و اقتصاد جنگل دانشکده منابع طبیعی دانشگاه تهران، ایران جهانگیر فقهی دانشیار گروه جنگلداری و اقتصاد جنگل دانشکده منابع طبیعی دانشگاه تهران، ایران محمود زبیری استاد گروه جنگلداری و اقتصاد جنگل دانشکده منابع طبیعی دانشگاه تهران، ایران محمدرضا مروی مهاجر استاد گروه جنگلداری و اقتصاد جنگل دانشکده منابع طبیعی دانشگاه تهران، ایران

quantifying spatial structure is one of the most important components, describing natural ecosystems and their biodiversity. in this study, a set of indices and functions related to spatial structure using 102 established plots with an area of 1000 m2 were presented. to achieve spatial structure of carpinus-fagus type, a set of indices (clark & evans, uniform angle, shannon-wiener, mingling and...

Journal: :آمایش سرزمین 0
علی جهانی دانشجوی دکتری جنگل داری، دانشکده منابع طبیعی، دانشگاه تهران مجید مخدوم فرخنده . استاد گروه جنگل داری، دانشکده منابع طبیعی، دانشگاه تهران ، جهانگیر فقهی دانشیار گروه جنگل داری، دانشکده منابع طبیعی، دانشگاه تهران ، وحید اعتماد . استادیار گروه جنگل داری، دانشکده منابع طبیعی، دانشگاه تهران

nowadays because of various factors, including inappropriate land use, and indiscriminate exploitation of water resources, soil and vegetation, wide areas of the country were exposed to destruction of lands and desertification. therefore dealing with this situation requires a comprehensive land use program (water and land) and appropriate environment potency. the study area is patom district of...

2016
Liang Xu Sassan S. Saatchi Yan Yang Yifan Yu Lee White

BACKGROUND Mapping tropical forest structure is a critical requirement for accurate estimation of emissions and removals from land use activities. With the availability of a wide range of remote sensing imagery of vegetation characteristics from space, development of finer resolution and more accurate maps has advanced in recent years. However, the mapping accuracy relies heavily on the quality...

Journal: :Photogrammetric Engineering & Remote Sensing 2016

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