نتایج جستجو برای: mean wind speed

تعداد نتایج: 846128  

Journal: :مهندسی بیوسیستم ایران 0
پریا سفیدپری دانشجوی دکتری مهندسی مکانیزاسیون کشاورزی، گروه مهندسی ماشین های کشاورزی، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران علیرضا کیهانی استاد گروه مهندسی ماشین های کشاورزی، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران سید حسن پیشگر کومله دانشجوی دکتری مهندسی مکانیزاسیون کشاورزی، گروه مهندسی ماشین های کشاورزی، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران مجید خانعلی استادیار گروه مهندسی ماشین های کشاورزی، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران اسداله اکرم عضو هیأت علمی گروه مهندسی ماشین های کشاورزی دانشگاه تهران

wind speed is one of the characteristics of wind energy which its data is extracted from meteorological stations. in this study, the data obtained from the weather station in the city eqlid during a ten-year period has been used. weibull distribution was chosen as the best distribution function using fitting tests and estimation of some statistical parameters. the results showed that the averag...

2005
PETER E. J. BALDWIN ANDREW D. MAYNARD

( The applicability of the inhalable convention for sampling aerosols relies on its being a valid model for typical sampling environments. The current convention is based on measurements carried out in external wind speeds between 1 and 4 m • s~'. However these measurements show a degree of wind speed dependence, and it is uncertain at present how valid the convention is for describing human as...

2002
Bruce R. White

The city of San Francisco enacted a pedestrian-level wind ordinance as part of its city and county municipal code in 1985. The purpose of this paper is to present in engineering detail the wind tunnel testing procedure and associated analysis which allows scaling of the windtunnel measurements. This technique uses site specific meteorological weather data, coupled with the wind-tunnel data, to ...

A.H. Halabian A.R. Dehghanpour, M. Fallahpour

The direction and speed of winds play an important role in the occurrence of pollutions and dust stormas well as location placement for the establishment of industries and the expansion of cities. Yazd is a dry area of Iran, and constantly exposed to the dust particles in the air; and this in terms of human life and health issues are of special importance. In this paper a day when due to the am...

A.H. Halabian A.R. Dehghanpour, M. Fallahpour

The direction and speed of winds play an important role in the occurrence of pollutions and dust stormas well as location placement for the establishment of industries and the expansion of cities. Yazd is a dry area of Iran, and constantly exposed to the dust particles in the air; and this in terms of human life and health issues are of special importance. In this paper a day when due to the am...

Journal: :پژوهش های جغرافیای طبیعی 0
حسین ملکوتی استادیار دانشکدة علوم و فنون دریایی دانشگاه هرمزگان محمد پاخیره زن دانشجوی دکتری فیزیک دریا، دانشکدة علوم و فنون دریایی دانشگاه هرمزگان وجیهه السادات حسنی کارشناسی ارشد هواشناسی، دانشکدة علوم و فنون دریایی دانشگاه هرمزگان

introduction shamal winds recognized as a climate regime with a common occurrence in the persian gulf makes periodically adverse weather conditions in this region. among the phenomena occurring under the influence of shamal wind, we can mention dust storms, low-level winds and turbulent marine conditions (rao, 2003). shamal winds are categorized into two types, winter shamal and summer shamal. ...

In this paper, the 10-minutes period measured wind speed data at different heights (10 m, 30 m, and 40 m) are presented for Khvaf, which is one of the major counties with high wind potential in Khorasan provinces in Iran. To the author’s knowledge, there hasn’t been any assessment works in the mentioned site. From the primary evaluation and by determining mean wind speed and also the Weibull fu...

Journal: :journal of ai and data mining 2016
n. bigdeli h. sadegh lafmejani

the renewable energy resources such as wind power have recently attracted more researchers’ attention. it is mainly due to the aggressive energy consumption, high pollution and cost of fossil fuels. in this era, the future fluctuations of these time series should be predicted to increase the reliability of the power network. in this paper, the dynamic characteristics and short-term predictabili...

In recent years, the use of offshore wind turbines has been considered on the agenda of the countries which have a significant maritime boundary due to more speed and stability of wind at sea. The aim of this study is to investigate the effect of wind turbulence on the aero-hydrodynamic behavior of offshore wind turbines with a monopile platform. Since in the sea, the wind turbine structures ar...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید