نتایج جستجو برای: us

تعداد نتایج: 348747  

Given the immense shifts the social networking sites and applications have brought about, a considerable number of researchers in the field of communication studies have turned to study different aspects of social media usage and factors influencing it. This study gathered data from 33318 US non-institutionalized citizens over 18 including 17079 females and 16239 males; they were members of web...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده فنی و مهندسی 1392

یکی از آلوده¬کننده¬های مهم در پساب، ترکیبات نیتروژنی است. نیتروژن آزاد شده به صورت یون¬های آمونیوم قادر است ترکیبات مختلفی را ایجاد نماید که اکثر آن¬ها مضر بوده و باعث تخریب محیط زیست و تغییر اکوسیستم می¬گردد. همواره تکنیک¬های نوین، توسعه و ساخت تجهیزاتی که بتواند حذف آلاینده از پساب را با راندمان بالایی انجام دهد، توجه بسیاری از محققین را به خود جلب کرده است. در این تحقیق، کارایی حذف امواج ماف...

The price of Iranian crude oil in different markets depends on the price of US crude oil. In recent months, the oil and gas industry and the sale of Iranian crude oil and the co-operation and investments of oil companies operating in the field of oil field development have halted. Therefore, examining the effects of US government policies on the oil market is very effective. The most important ...

Journal: :International Journal of Medical and Surgical Sciences 2019

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1958
W L Chow

v1(°'(t), we obtain a system of linear equations whose solution is clearly xi = x,(°'. It follows that a set of forcing functions which minimize G subject to the linear equations of (2.1), together with the original constraints, yields a value of G which is at most G(x1(P)(T), . . . , xv(z)(T)). The general result follows inductively. This monotonicity is not surprising, since we are using the ...

1995
Yunkang Liu

This paper is concerned with the integro-diierential equations y 0 (t) = ay(t) + Z 1 0 y(qt) d(q) + Z 1 0 y 0 (qt) d(q); t 0 and y(t) + Z 1 0 y(qt) d(q) + Z 1 0 y 0 (qt) d(q) = 0; t 0; where a is a complex constant, while and are complex-valued functions of bounded variation on 0; 1]. The main motivation for the study of these two equations is that for every integers B + 1 A 0 and real constant...

2016
Mário Garcia Felipe Monteiro Eddie de Lima Filho

We propose a simplified version of the Qt framework, called as Qt Operational Model, which is integrated into the Efficient SMT-based Context-Bounded Model Checking tool, for verifying actual Qt-based applications. Experimental results show that our proposed approach can be effectively and efficiently applied to verify Qt-based real-world applications from consumer electronics.

2017
M. R. Fengler

Multivariate volatility models are widely used in finance to capture both volatility clustering and contemporaneous correlation of asset return vectors. Here, we focus onmultivariate GARCHmodels. In this commonmodel class, it is assumed that the covariance of the error distribution follows a time dependent process conditional on information which is generated by the history of the process. To p...

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