نتایج جستجو برای: permeability circle
تعداد نتایج: 73817 فیلتر نتایج به سال:
This paper proposes a mechanism called the mode-switching model that is presented as an alternative to fault-valve model. relevant open-flow, low-porosity, fluid-saturated systems deforming by pressure solution creep. As opposed most constitutive models discussed in geological literature, yield envelope capped at high normal stresses, demonstrated experimental studies. A low-permeability rock h...
Background: Several studies have investigated the variations in the anatomy of each segment of circle of Willis whereas a few have addressed the variations of this arterial circle as a whole. In this study the entire circle of Willis and its variations were studied in a cohort of Iranian people and compared with previous reports.Methods: Anatomical variations of the circle of Willis in 132 brai...
"Development" and "modernization" or "modernity" are related concepts that are widely but variously used to refer to major social, economic and political changes. Some scholars equate political development with the ability of a political system to grow and adjust to new demands put upon it. The environment of bureaucracy may be visualized as series of concentric circles, with bureaucracy at th...
To investigate gas flow characteristics in coal seams with strong anisotropy, a coupled anisotropic dual-porosity model was established. Effects of permeability anisotropy on variations pressure, extraction volume and effective areas were analyzed. Furthermore, mechanisms crustal stress, initial ultimate adsorption strain Langmuir constant amount studied. Results show that could result an ellip...
ardy and littlewood conjectured that every large integer $n$ that is not a square is the sum of a prime and a square. they believed that the number $mathcal{r}(n)$ of such representations for $n = p+m^2$ is asymptotically given by begin{equation*} mathcal{r}(n) sim frac{sqrt{n}}{log n}prod_{p=3}^{infty}left(1-frac{1}{p-1}left(frac{n}{p}right)right), end{equation*} where $p$ is a prime, $m$ is a...
Kaaba known as Qibla and the focus point of Muslim people is of paramount importance. Many scientists in the field of mathematics, astronomy and geography throughout the Islamic world tried to find the exact methods and procedures to determine the direction of Qibla. One of these methods is Hindi Circle used to determine Qibla of mosques. Most often the scientists, scholars and astronomers gath...
in chapter one we will describe definitions and preliminary results to provide the global context of our own results to be presented in detail in the subsequent chapters in chapter two we consider degree-one maps of the circle and we study their rotation set. our main result in this chapter says that if the map is topologically mixing then its rotation interval is nontrivial (that is, not reduc...
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