نتایج جستجو برای: a1b models in birjand boshruyeh
تعداد نتایج: 17089245 فیلتر نتایج به سال:
abstract: in the paper of black and scholes (1973) a closed form solution for the price of a european option is derived . as extension to the black and scholes model with constant volatility, option pricing model with time varying volatility have been suggested within the frame work of generalized autoregressive conditional heteroskedasticity (garch) . these processes can explain a number of em...
Kariro Pb prospect area, which is located in northwest of Boshruyeh, occurs as vein-veinlets, open space filling, and cement of fault breccia in Middle Jurassic metamorphosed shale (slate) unit of Baghamshah Formation. Mineralization zones contain dolomite (70-85%) and galena (0.5-2.5%) with small amounts of pyrite, quartz, and calcite. Dolomitization and silicification of host rock are the mos...
abstract introduction: acute myocardial infarction (ami) is one of the main causes of mortality and morbidity in developing and underdeveloped countries. the aim of the present study was to evaluate the trend of ami risk factors in the city of birjand, iran, between 1994 and 2003. methods: this cross-sectional study was based on the medical records of patients hospitalized due to ami from 1994 ...
The structure and variance of the equatorial zonal circulation, as characterized by the atmospheric mass flux in the equatorial zonal plane, is examined and intercompared in simulations from 9 CMIP3 coupled climate models with multiple ensemble members and the NCEPNCAR and ERA-40 reanalyses. The climate model simulations analyzed here include twentieth century (20C3M) and twenty-first century (...
Biogenic emissions and secondary organic aerosols (SOA) are strongly dependent on climatic conditions. To understand the SOA levels and their sensitivity to future climate change in the United States (U.S.), we present amodelingworkwith the consideration of SOA formation from the oxidation of biogenic emissions with atmospheric oxidants (e.g., OH, O3, and NO3). The model simulation for the pres...
groundwater quality regarding major anions and cations in the birjand plain located in the largest desert in eastern iran was monitored in this study. fifteen boreholes were considered as sampling stations and the parameters ph, tds, ec and major anions and cations were measured in groundwater samples. the dominant groundwater types can be introduced as sodium-chloride and magnesium-sulphate. t...
چکیده رقابت پذیری معیاری کلیدی برای ارزیابی درجه موفقیت کشورها،صنایع و بنگاهها در میدان های رقابتی سیاسی،اقتصادی و نجاری به حساب می آید.بدین معنی که هر کشور،صنعت یا بنگاهی که از توان رقابتی بالایی در بازارهای رقابتی برخوردار باشد،می توان گفت که از رقابت پذیری بالاتری برخوردار می باشد.در تحقیقات مختلف، رقابت پذیری در سه سطح ملی،صنعت و بنگاه مورد توجه قرار گرفته که در این میان سطح بنگاه از د...
BACKGROUND Various studies have indicated that dyslipidemia starts in childhood. There is a relationship between the concentration of blood lipids and atherosclerosis. In this study, we assessed the prevalence of dyslipidemia in elementary school children. METHODS This cross-sectional study was performed on 1,626 (882 girls and 744 boys) elementary school children aged between 6 and 11 years ...
BACKGROUND Infection with the hepatitis B virus (HBV) is an important global health problem. Knowledge of the geographic distribution pattern of HBV infection can help to control the spread of the disease. OBJECTIVES To determine the prevalence of HBV infections and risk factors for the disease for the first time in Birjand, Southeastern Iran. METHODS This was an analytical cross-sectional ...
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