نتایج جستجو برای: greenhouse gass

تعداد نتایج: 33467  

2016
Miran Baek Myeongbae Lee Hong-geun Kim Jangwoo Park Yongyun Cho Changsun Shin

In this paper, an intelligent control of the greenhouse in the Greenhouse Management Framework (GMF) has been designed for the purpose of increasing the farmer’s profit and promoting the ease of agricultural production. The GMF is divided into Greenhouse Control Engine and Crop Growth Engine. The Greenhouse Control Engine consists of Data Aggregator, Greenhouse Information Storage, and Greenhou...

رضوان موسوی ندوشن شیما سرکشیکیان,

در تحقیق حاضر، پروفایل اسیدهای چرب زئوپلانکتون Acartia tonsaدر فصل بهار و تابستان سال 1394 در حوزه جنوبی دریای خزر(منطقه نوشهر) مورد مطالعه قرار گرفته است. نمونه گیری بوسیله تورهای مخصوص زئوپلانکتون، با چشمه 100 میکرومتر به صورت افقی در زیر سطح آب انجام شد.نمونه های Acartia tonsaدر آزمایشگاه جداسازی، فیلتر و تا انجام آزمایش چربی منجمد شدند. تعیین ترکیب اسیدهای چرب ژئوپلانکتون توسط دستگاه GC/mas...

2014
K. NISHANTH RAO

Greenhouses are often used for growing flowers, vegetables, fruits, and tobacco plants. Most greenhouse systems still use the manual system in monitoring the temperature and humidity in the greenhouse, a lot of problems can occur not for worker but also affected production rate because the temperature and humidity of the greenhouse must be constantly monitored to ensure optimal conditions. The ...

2013
Zouheir Hafidi Rajae Daoudi

Nous rapportons un cas de télangiectasies juxtafovéolaires unilatérales de type 1 A révélées par une baisse d'acuité visuelle progressive de l'œil gauche, évoluant depuis 7 mois chez un jeune patient de 25 ans sans antécédents pathologiques notables. L'examen du fond de l'oeil gauche notait un placard exsudatif de la région maculaire entourant des anomalies de la microcirculation paramaculaire ...

2015
Olaf Morgenstern Guang Zeng SamM. Dean Manoj Joshi N. Luke Abraham

We assess the roles of long-lived greenhouse gases and ozone depletion in driving meridional surface pressure gradients in the southern extratropics; these gradients are a defining feature of the Southern Annular Mode. Stratospheric ozone depletion is thought to have caused a strengthening of this mode during summer, with increasing long-lived greenhouse gases playing a secondary role. Using a ...

2002
F. Rodríguez L. J. Yebra M. Berenguel S. Dormido Senda del Rey

This paper deals with the modelling and simulation of greenhouse climate. The obtaining of greenhouse production models (climate, crop development, etc.) is a subject of large interest nowadays, as these models can be used for simulation, control and production optimization purposes. A greenhouse constitutes a complex dynamical system, which is described in this paper using the object-oriented ...

2012

This paper reviews the greenhouse gas emissions of prefabrication elements for residential development in Hong Kong. Prefabrication becomes a common practice in residential development in Hong Kong and is considered as a green approach. In Hong Kong, prefabrication took place at factories in Pearl River Delta. Although prefabrication reduces construction wastage, it might generate more greenhou...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2013
Ivan Sudakov Sergey Vakulenko

We propose a generalization of the classical Goody model by taking into account greenhouse gas emission effects. We develop an asymptotic approach that allows us to obtain an expression for the greenhouse gas flux via the temperature and fluid fields. We show that there is a possible tipping point in atmospheric dynamics resulting from greenhouse gas emissions, where the climate system becomes ...

Journal: :Science 2010
Andrew A Lacis Gavin A Schmidt David Rind Reto A Ruedy

Ample physical evidence shows that carbon dioxide (CO(2)) is the single most important climate-relevant greenhouse gas in Earth's atmosphere. This is because CO(2), like ozone, N(2)O, CH(4), and chlorofluorocarbons, does not condense and precipitate from the atmosphere at current climate temperatures, whereas water vapor can and does. Noncondensing greenhouse gases, which account for 25% of the...

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