نتایج جستجو برای: atmospheric threshold

تعداد نتایج: 198677  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید بهشتی - دانشکده علوم زمین 1387

چکیده ندارد.

ژورنال: سلامت و محیط زیست 2010
حسنعلی زاده مظهر, امیر شاهرخ, رمضانزاده, زهرا, سخاوتجو, محمدصادق, فرهمندکیا, زهره, مهراسبی, محمد رضا,

Backgrounds and Objectives : Heavy metals in dust can enter to the human body through ingestion andinhalation. They can pollute the water and soil resources via atmospheric precipitation and accumulate in the plants tissue and enter human body by water and food. The aim of this study was measurement of the heavy metals in wet and dry atmospheric precipitation and effects of pollution sources at...

There are many unavoidable noise interferences in image acquisition and transmission. To make it better for subsequent processing, the noise in the image should be removed in advance. There are many kinds of image noises, mainly including salt and pepper noise and Gaussian noise. This paper focuses on the research of the Gaussian noise removal. It introduces many wavelet threshold denoising alg...

2007
H. Verbeeck K. Steppe N. Nadezhdina M. Op De Beeck G. Deckmyn L. Meiresonne R. Lemeur J. Čermák R. Ceulemans I. A. Janssens

Storage water use is an indirect consequence of the interplay between different meteorological drivers through their effect on water flow and water potential in trees. We studied these microclimatic drivers of storage water use in Scots pine (Pinus sylvestris L.) growing in a temperate climate. The storage water use was modeled using the ANAFORE model, integrating a dynamic water flow and – sto...

2014
Jolanda M. H. Verspagen Dedmer B. Van de Waal Jan F. Finke Petra M. Visser Ellen Van Donk Jef Huisman

Harmful algal blooms threaten the water quality of many eutrophic and hypertrophic lakes and cause severe ecological and economic damage worldwide. Dense blooms often deplete the dissolved CO2 concentration and raise pH. Yet, quantitative prediction of the feedbacks between phytoplankton growth, CO2 drawdown and the inorganic carbon chemistry of aquatic ecosystems has received surprisingly litt...

Journal: :Remote Sensing 2022

LiDAR is an excellent source of elevation data used in many surveys. The spaceborne handle system, Global Ecosystem Dynamics Investigation (GEDI), provides ground information with high accuracy except for areas steep slopes. GEDI have a lot noise from atmospheric conditions, and therefore filtering procedures are mandatory to select the best dataset. dataset presents uncertainties different mag...

Journal: :Small 2021

Threshold switching devices are fundamental active elements in more than Moore approaches, integrating the new generation of non-volatile memory devices. Here, authors report an in-plane threshold resistive device with on/off ratio above 106, a low resistance state 10 to 100 k? and high G?. Our based on nanocomposites silver nanowire networks titanium oxide, where volatile unipolar takes place ...

2011
Barbara Meller Klaus Düllmann Frank Heid Heinz Herrmann Karl-Heinz Tödter

This paper provides evidence for a significant relation between international financial markets’ integration and output volatility. In the framework of a threshold model, it is shown empirically that this relation depends on country’s financial risk. Financial risk indicates a country’s ability to pay its official, commercial and trade debts. In countries with low financial risk, financial open...

2012
Bjorn Van Campenhout

Mozambique A Non-Parametric Extension to the Threshold Model Bjorn Van Campenhout One of the main drawbacks of current methods to measure market integration is the assumption of constant transaction costs. In this paper, we propose a non-parametric extension to the commonly used threshold models, allowing us to estimate transaction costs in a more flexible way. We illustrate the method using we...

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