نتایج جستجو برای: component analysis
تعداد نتایج: 3268531 فیلتر نتایج به سال:
the purpose of this study was to describe the association between grain yield and its components. the experiment was conducted in a randomized complete block design with three replicatsions. results of analysis showed that similar trends were observed for genotypic and phenotypic correlations and in most cases, the value for genetic correlation was greater than phenotypic value. 100-seed weight...
when the number of training samples is limited, feature reduction plays an important role in classification of hyperspectral images. in this paper, we propose a supervised feature extraction method based on discriminant analysis (da) which uses the first principal component (pc1) to weight the scatter matrices. the proposed method, called da-pc1, copes with the small sample size problem and has...
t is the purpose of this paper to contribute to the discussion initiated bywachter about the parallelism between principal component (pc) and atypological grade of membership (gom) analysis. the author testedempirically the close relationship between both analysis in a lowdimensional framework comprising up to nine dichotomous variables and twotypologies. our contribution to the subject is also...
the field study was conducted in one district of educational-experimental forest at tehran university (kheirood-kenar forest) in the north of iran. eighty-five soil profiles were dug in the site of study and several chemical and physical soil properties were considered. these factors included: soil ph, soil texture, bulk density, organic carbon, total nitrogen, extractable phosphorus and depth ...
background and objectives: evaluating the performance of clinical units is critical for effective managementof health settings. certain assessment of clinical variables for performance analysis is not always possible,calling for use of uncertainty theory. this study aimed to develop and evaluate an integrated independentcomponent analysis-fuzzy-data envelopment analysis approach to accurate the...
data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...
گلسنگ ها از اجتماع یک شریک قارچی ( آسکومیست ها یا بازیدیومیست ها) و شریک جلبکی (سبز یا سبز آبی) تشکیل شده اند. آنها دارای اشکال رویشی پوسته ای((crustose، برگی((foliose، بوته ای( (fruticose، ژلاتینی((gelatinous و فلسی((squamulose هستند. در این نوشتار، تاکسونومی گلسنگهای ساکن بر روی سنگ های آذرین و رسوبی در اطراف مشهد در یک آب و هوای نیمه خشک بررسی شده است. بر اساس مطالعات صحرایی و پتروگرافی و ته...
سندرم متابولیک نوعی اختلال است که عموما با چاقی شکمی ،پرفشاری خون، دیس لیپیدمی و تست تحمل گلوکوز غیر طبیعی همراه است.این سندرم میتواند نشانه پیش آگهی بیماریهای کشنده ای همچون بیماریهای قلبی وعروقی ودیابت تلقی گردد.مطالعه حاضر جستجوی متابولیتهای حاصل مسیرها بیوشیمیایی درگیر در این بیماری رابا روش متابولومیکس ومتابونومیکس بررسی می نماید . امروزه تکنیکهای متابولومیکس و متابونومیکس به کمک اسپکتروس...
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