نتایج جستجو برای: 500 hpa geopotential heights 500hpa hgt the explanatory variables for mean maximum temperature are vorticity at 500 hpa

تعداد نتایج: 18662522  

Journal: :Journal of the Meteorological Society of Japan 2021

This study proposes an algorithm detecting atmospheric blocking by extracting topological features of geopotential height data at 500 hPa. The uses flow analysis (TFDA) providing a unique symbolic representation, named the partially cyclically ordered rooted tree (COT) and discrete graph structure, called Reeb graph, to each structurally stable Hamiltonian vector field based on mathematical the...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم انسانی 1390

one very decisive factor in students’ academic destiny is the result they get at final term examinations. because of its importance, both students and teachers are curiously anxious about them. as normally it is the case, these final term tests are prepared hurriedly in short time by teachers which result in students’ dissatisfaction, complaining on how the test was different from their expecta...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - پژوهشکده مهندسی فرایند 1395

abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...

2016

This study presents statistical relationships between cloud-top cloud thermodynamic phase and aerosols (dust, polluted dust and smoke) as well as meteorological variables (vertical velocity at 500 hPa, lower tropospheric static stability (LTSS) and surface temperature) to infer the influence of atmospheric dynamics on cloud thermodynamic phase using a combination of global satellite observation...

پایان نامه :دانشگاه امام رضا علیه اسلام - دانشکده ادبیات و زبانهای خارجی 1393

abstract this mixed method study examines whether there is any relationship among the variables of the study (job satisfaction, social capital and motivation). the researcher considered job satisfaction and social capital as independent variables; motivation is the dependent variable of the study. the researcher applied a questionnaire to assess each variable. to measure efl teachers’ job sati...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده شیمی 1392

in the present work, a simple and sensitive method was developed for determination of morphine and heroin using gold nanoparticles as resonance rayleigh scattering (rrs) and colorimetric technique’s probe. synthesized gold nanoparticles by sodium citrate reduction method have a negative charge layer on their surfaces because of self-assembled citrate anions on their surface. binding of morphin...

2017
JEFFREY C. ROGERS JILL S. M. COLEMAN

The relationship between the Pacific/North American (PNA) atmospheric circulation teleconnection, equatorial Pacific sea surface temperature anomalies (SSTAs), and Ohio winter (DJF) precipitation and stream flow is described using data for 84 statewide climate stations and 29 rivers. Maximum correlations between the PNA index (PNAI) and station precipitation reach r = -0.7 in southwestern Ohio ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده مهندسی 1387

abstract this paper discusses several commonly used models for strategic marketing¹ including market environmental analysis methods (i.e. swot and pest analysis) and strategic marketing tools and techniques (i.e. boston matrix and shell directional policy matrix)and shows how these models may help a firm to achieve its strategic goals. at first, the main reason for doing this research is de...

Journal: :Atmosphere 2022

Deep learning artificial intelligence technology, which has the advantages of nonlinear mapping ability, massive information extraction spatial-temporal modeling and so on, provides new ideas methods for further improving accuracy weather climate extreme event prediction. A transfer CNN (Convolutional Neural Networks) classification model is established to classify circulation patterns, along w...

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