نتایج جستجو برای: minimum relative humidity

تعداد نتایج: 559031  

Journal: :اکو هیدرولوژی 0
مهدی بهرامی استادیار، گروه علوم و مهندسی آب، دانشکدۀ کشاورزی، دانشگاه فسا محمدجواد امیری استادیار، گروه علوم و مهندسی آب، دانشکدۀ کشاورزی، دانشگاه فسا فاطمه رضایی مهارلویی دانشجوی کارشناسی ارشد آبیاری و زهکشی، گروه علوم و مهندسی آب، دانشکدۀ کشاورزی، دانشگاه فسا کرامت الله غفاری مربی گروه فناوری اطلاعات، دانشکدۀ مهندسی، دانشگاه فسا

since many time series are not normal, it is required to normalize data by transformation functions prior to any analysis and modeling. in this study, the next month rainfall of abadeh county station was predicted using the average monthly rainfall, minimum and maximum temperatures and minimum and maximum humidity as inputs of mlp network, both normally and raw, at period 1976 to 2013. after sc...

2013
Michael P. Byrne Paul A. O’Gorman

[1] Simulations of warming climates with coupled climate models exhibit strong land-ocean contrasts in changes in surface temperature and relative humidity, but little land-ocean contrast in changes in equivalent potential temperature. A theory that assumes equal changes in equivalent potential temperature over land and ocean captures the simulated land-ocean warming contrast in the tropics if ...

2005
Ernie R. Lewis Stephen E. Schwartz

Zhang et al. (2005) present a parameterization for what they term the "growth factor" of a sea salt aerosol particle relative to its formation diameter, which they assert "is a function of relative humidity alone" and independent of an arbitrary reference relative humidity. Here we note that this growth factor implicitly assumes an arbitrary reference relative humidity through the salinity of t...

Journal: :Plant physiology 1971
D P Bourque A W Naylor

In the course of investigating RNA metabolism in greening plastids of unexpanded leaves of jack bean (Canavalia ensiformis [L.] DC.) seedlings, it was found that relative humidity had to be controlled in order to obtain reproducible rates of chlorophyll accumulation and 'H-uracil incorporation into newly synthesized RNA. Under high relative humidity conditions, chlorophyll accumulation occurred...

2009
I. Yildiz

The objective of this study was to evaluate the effects of relative humidity, light management levels, minimum ventilation rates, CO2 enrichment and canopy size on energy consumption in three different greenhouse systems (conventional, open-loop heat pump, and confined heat pump) in winter, spring, and summer months. No difference was observed in energy consumption with relative humidity set po...

Journal: :African health sciences 2013
Y Chen X Xu J Liang H Lin

BACKGROUND Nosocomial infections constitute a global health problem. OBJECTIVES To explore the relationship between nosocomial infection rates (NIRs) and climatic factors including temperature and relative humidity in Guangzhou area of China. METHODS 30892 patients in our hospital in 2009 were investigated for nosocomial infection status, and the contemporaneous temperature and relative hum...

2017
Cristina Gaspar Juuso T. Olkkonen Soile Passoja Maria Smolander

An inkjet-printed relative humidity sensor based on capacitive changes which responds to different humidity levels in the environment is presented in this work. The inkjet-printed silver interdigitated electrodes configuration on the paper substrate allowed for the fabrication of a functional proof-of-concept of the relative humidity sensor, by using the paper itself as a sensing material. The ...

2012
Wei Wu Yangang Liu Alan K. Betts

[1] This study evaluates three major Numerical-Weather-Prediction reanalyses (ERA-Interim, NCEP/NCAR Reanalysis I, and NCEP/DOE Reanalysis II) in modeling surface relative shortwave cloud forcing, cloud fraction, and cloud albedo. The observations used for this evaluation are decade-long surface-based continuous measurements of the U.S. Atmospheric Radiation Measurement (ARM) program from 03/25...

Journal: :iranian journal of hydrogen & fuel cell 2015
hassan hassanzadeh seyed hadi golkar

in this paper, a non-isothermal two-phase flow in the cathode gas diffusion layer (gdl) of pem fuel cell is modeled. the governing equations including energy, mass and momentum conservation equations are solved by numerical methods. also, the optimal values of the effective parameters such as the electrodes porosity, gas diffusion layer (gdl) thickness and inlet relative humidity are calculated...

Journal: :آب و خاک 0
حمید زارع ابیانه مریم بیات ورکشی صفر معروفی رضا امیری چایجان

abstract the present study is attempted to present the minimum required meteorological parameters for reference evapotranspiration estimation at hamedan region of iran from 1997 to 1998. employing pierson test, six meteorological parameters which are used by penman-montieth fao-56 method including maximum and minimum air temperature, maximum and minimum relative humidity, wind speed and daily s...

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