نتایج جستجو برای: physical method
تعداد نتایج: 2202734 فیلتر نتایج به سال:
امروزه در تصفیه فاضلاب بخصوص تصفیه پساب های صنعتی به دلیل جلوگیری از معضلات زیست محیطی سعی می شود. پساب تصفیه شده را جهت مصارف کشاورزی و حتی استفاده مجدد آن در خط تولید کارخانه بکار برند. برای تصفیه پساب حاصل از تولید و فاضلاب بهداشتی در کارخانه های خودروسازی از روش های فیزیکی و شیمیایی جهت تصفیه اولیه فاضلاب صنعتی استفاده می شود. سپس تصفیه نهایی با استفاده از روش بیولوژیکی لجن فعال بر روی فاضل...
the aim of this study was to compare mental health, quality of life and emotional intelligence in physical education teachers and non-physical education teachers in kermanshah. this study was carried out by a causal-comparative and field method. the statistical population of this study comprised all the teachers of kermanshah (972 physical education teachers and 2854 non-physical education teac...
We present a method called MOPED for optimizing energetic and structural parameters in computational models, including all-atom energy functions, when native structures and decoys are given. The present method goes beyond previous approaches in treating energy functions that are nonlinear in the parameters and continuous in the degrees of freedom. We illustrate the method by improving solvation...
The concept of the theory of continuous groups of transformations has attracted the attention of applied mathematicians and engineers to solve many physical problems in the engineering sciences. Three applications are presented in this paper. The first one is the problem of time-dependent vertical temperature distribution in a stagnant lake. Two cases have been considered for the forms of the w...
There is increasing evidence supporting the health benefits of physical activity in children both in the immediate term in terms of body composition and in the longer term in the prevention of risk factors for cardiovascular disease, type-2 diabetes osteoporosis and certain cancers (Lee at al, 2000; Mohan et al, 2005; Blair et al, 1999; Pan et al, 1997; Tuomilehto et al, 2001; Colditz et al, 20...
We present a new mathematical technique for retrieving the temperature profile from a ground based microwave profiler and ancillary measurements. It is based on a gradient flow approach. We are able to solve the inverse problem of radiative transfer and determine the temperature profile from ten simultaneous brightness temperature measurements in the range from 50.8 to 58.8 GHz. The approach us...
Modeling of physical systems includes extensive use of software packages that implement the accurate finite element method for solving differential equations considered along with the appropriate initial and boundary conditions. When the problem size becomes large, time needed to solve the resulting linear systems may range from hours to weeks, and if the input parameters need to be adjusted, e...
This paper presents a physical database design methodology for multidimen-sional le organizations. Physical database design is the process of determining the optimal connguration of physical les and access structures for a given set of queries. Recently, many multidimensional le organizations have been proposed in the literature. However, there has been no eeort for their physical database desi...
Physical inactivity and prolonged static work tasks may seriously affect health. There are numerous indications that promoting physical activity (PA) at sedentary workplaces can reduce these health risks. However, PA interventions have so far been documented rarely on the basis of medical parameters. Effects on the PA behavior are often studied only through the methods of subjective self-assess...
Providing opportunities for students to be physically active during the school day leads to increased academic performance, better focus, and fewer behavioral problems. As schools begin to incorporate more physical activity programming into the school day, evaluators need methods to measure how much physical activity students are being offered through this programming. Because classroom-based p...
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