نتایج جستجو برای: atmospheric action centers
تعداد نتایج: 789993 فیلتر نتایج به سال:
the upper level pressure patterns control the climate of the surface. the identification of these patterns in the regional scale is useful for the study of the surface climate elements and their forecasting. in order to understand the pressure centers controlling the climate of iran during the cold period of the year, the daily 500 hpa. geopotential height of the grid points of 2.5 degrees dist...
Antithrombotic therapy after bioprosthetic aortic valve replacement: ACTION Registry survey results.
AIMS A variety of antithrombotic regimens have been described for the early postoperative period after bioprosthetic aortic valve replacement (AVR). This study reviews antithrombotic practice for patients undergoing bioprosthetic AVR with or without coronary artery bypass graft (CABG) amongst the centers participating in the ACTION (Anticoagulation Treatment Influence on Postoperative Patients)...
objective: this research aimed to study the relationship between scrupulosity and obsessivecompulsive symptoms as well as obsessive-compulsive-related cognitive styles (obsessive beliefs and thought-action fusion). methods: this was a correlational study. the study population included all individuals who referred to counseling centers of tehran from august to december 2010 and diagnosed with o...
Middle to upper tropospheric humidity plays a large role in determining terrestrial outgoing longwave radiation. Much work has gone into improving the accuracy of humidity measurements made by radiosondes. Some radiosonde humidity sensors experience a dry bias caused by solar heating. During the austral summers of 2002/03 and 2003/04 at Dome C, Antarctica, Vaisala RS90 radiosondes were launched...
Que la contaminación atmosférica causada por los humanos tiene efectos negativos en la salud de los propios humanos es un hecho conocido desde hace varias décadas. En los últimos 20 años, los resultados de muchas investigaciones han demostrado numerosas caracterı́sticas de dicha relación y han sentado las bases que demuestran que, en nuestros dı́as, la contaminación atmosférica continúa siendo un...
This paper presents a quantitative methodology for evaluating air–sea fluxes related to ENSO from different atmospheric products. A statistical model of the fluxes from each atmospheric product is coupled to an ocean general circulation model (GCM). Four different products are evaluated: reanalyses from the National Centers for Environmental Prediction (NCEP) and the European Centre for Medium-...
Due to the complexity of air pollution action, artificial intelligence models specifically, neural networks are utilized to simulate air pollution. So far, numerous artificial neural network models have been used to estimate the concentration of atmospheric PMs. These models have had different accuracies that scholars are constantly exceed their efficiency using numerous parameters. The current...
Organic pollutants have been monitored in the atmosphere of the Great Lake Basin (GLB) since the 1990s in support of the Canada-US Great Lakes Water Quality Agreement and to determine the effectiveness of source reduction measures and factors influencing air concentrations. Air samples were collected between 2005 and 2014 at three sites with different geographical characteristics (Burnt Island,...
در این پایان نامه ربات متحرک چرخ دار به همراه دو تریلر مورد تحلیل و بررسی قرار می گیرد. در ابتدا سیستم مورد نظر معرفی شده و تمامی فرضیات هندسی و مشخصات جرمی مورد نیاز بیان می شود. در بخش بعد، بردار مختصات تعمیم یافته ربات و همچنین بردار ورودی مدل سینماتیکی ربات در نظر گرفته شده و در نتیجه سینماتیک مستقیم ربات حاصل می شود. از روی مدل سینماتیکی ربات، ماتریس ژاکوبین را می توان استخراج کرد. با توجه...
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