نتایج جستجو برای: spatial quality

تعداد نتایج: 1091137  

Background and Purpose: This study was undertaken, first, to investigate the hydrogeological setting of the study area and geophysical data, second to examine the general nature of the groundwater quality. In this regard, ordinary Kriging, Co-Kriging, and Inverse Weighted Distance (IWD) strategies were applied to develop spatial variability maps, and study the fluctuations in groundwater qualit...

Journal: :iranian journal of health sciences 0
zahra nourbakhsh department of environmental management, school of environment and energy, islamic azad university, science and research branch, tehran, iran naser moharamnejad department of environmental management, school of environment and energy, islamic azad university, science and research branch, tehran, iran naser mehrdadi department of environmental engineering, school of environment, university of tehran, tehran, iran amir hesam hassani department of environmental engineering, school of environment and energy, islamic azad university, science and research branch, tehran, iran hossein yousefi department of renewable energies and environmental engineering, school of new sciences and technologies, university of tehran, tehran, iran

abstract background and purpose:in many regions especially in the north of iran groundwater is the most important resource for drinking supply. a present study was carried out in the tajan plain in northern iran. the aim of this study was to evaluate the quality of groundwater. materials and methods:in order to constructing the groundwater quality index (gwqi) 3 main levels were composed select...

2012
Joshua S. Stein Clifford W. Hansen

Variability of photovoltaic (PV) power output is a potential concern to utilities because it can lead to voltage changes on the distribution system and have other adverse impacts on power quality unless additional equipment is added or operational practices are changed to mitigate these effects. This paper develops and evaluates a simple yet novel approach for quantifying irradiance variability...

2009
Karin Meyer

Survival analysis is applied to records for length of productive life of Angus cows, fitting several proportional hazards models. It is shown that a piece-wise Weibull model with a time-dependent stage effect can model the distinct annual culling pattern reasonably well. Analyses fitting a sire model suggest some genetic variability, with heritability estimates on the logarithmic scale ranging ...

2013
Matthias Weidlich Tomer Sagi Henrik Leopold Avigdor Gal Jan Mendling

Process model matching refers to the task of creating correspondences among activities of different process models. This task is crucial whenever comparison and alignment of process models are called for. In recent years, there have been a few attempts to tackle process model matching. Yet, evaluating the obtained sets of correspondences reveals high variability in the results. Addressing this ...

اسدی نیلوان, امید, سقازاده, نرگس, فتاحی, احمد,

Groundwater resources management is very important in arid and semi-arid areas. Study of spatial variation of groundwater quality parameters have important role in recognition of aquifer quality condition, pollution sources and determination the most suitable managerial strategies. Geostatistical and GIS methods can be useful in this regard. In this article, by using of Inverse Distance Weighti...

Journal: :Regional Science and Urban Economics 2010

Journal: :IEEE Transactions on Circuits and Systems for Video Technology 2021

Heterogeneous spatial quality in 360-degree videos is characterized by regions of high and low appearing the same video chunk. Encoding quality-varying omnidirectional enables bandwidth waste optimization without compromising inside client's viewport. has been implemented using either concept tiling or Facebook's offset projection. In this paper, we study preparation heterogeneous with three ma...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم کشاورزی و منابع طبیعی گرگان - دانشکده جنگلداری و مهندسی چوب و کاغذ 1391

درک الگوی توزیع مکانی ماکروفون خاک بدلیل اثرات آن روی فرآیندهای اکوسیستم بسیار مهم است. لیکن اطلاعات کمی در این خصوص وجود دارد. درمورد تنوع زیستی ارگانیسم ها وجانداران خاکزی که ازاجزای مهم وکلیدی درهرسیستم اکولوژیکی هستند و در بهبود حاصلخیزی خاک و تولیدات زمین وپایداری اکوسیستم ها(ازطریق فرآیندهای بیولوژیک)نقش عمده دارند تحقیقات کمی انجام شده است. این تحقیق جهت بررسی الگوی مکانی پارامترهای تنوع...

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