منابع مشابه
Recent Methodology Developments in Soil Fluorine Analysis
Introduction Fluorine (F) is one of several trace elements receiving much attention owing to its possible harmful effects on health and environment. There are many methods used as the standard method of analysis of total F in soil. These include: ion selective electrode (ISE); X–ray fluorescence (XRF); Ion chromatography; Instrumental Neutron Activation Analysis (INAA); and Atomic and molecular...
متن کاملa synchronic and diachronic approach to the change route of address terms in the two recent centuries of persian language
terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...
15 صفحه اولsurvey microbial decomposition leaf litter of salix sp. populus sp. robinia sp. in artificial stream
مطالعه اکولوژیک از سرچشمه رودخانه قره سو(سراب روانسر) در استان کرمانشاه واقع در غرب ایران در پائیز 1378 انجام شد، حداکثر دمای آب 20 درجه سانتی گراد بود، هنگام مطالعه دما در سرچشمه 18 سانتی گراد بود، مقدار عناصر شیمیایی آب اندازه گیری نشد. در این پژوهش لاشبرگ های درختی از بید، چنار، اقاقیا جمع آوری سپس توسط بخش هرباریوم دانشکده کشاورزی دانشگاه شناسایی شدند. وزن خاکستر خشک afdm در(نمونه برداری ...
15 صفحه اولSurvey of Recent Clustering Techniques in Data Mining
Cluster analysis or clustering is the task of assigning a set of objects into groups called clusters. Main task of clustering are explorative data mining, and a common technique for statistical data analysis used in many fields, including machine learning, pattern recognition, image analysis, information retrieval, and bioinformatics. Cluster analysis itself is not one specific algorithm, but t...
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ژورنال
عنوان ژورنال: Public Health Reports (1896-1970)
سال: 1949
ISSN: 0094-6214
DOI: 10.2307/4587063