نتایج جستجو برای: using cluster analysis
تعداد نتایج: 5428585 فیلتر نتایج به سال:
the genetic diversity of 40 tobacco (nicotiana tabacum l.) cultivars was analyzed using 12 issr primers. thecultivars were evaluated for 14 traits using a simple lattice design (7×7) with two replications. of 149 amplified bands, 142 (95.3%) were polymorphic. maximum and minimum bands were generated by primers ubc825 (17 bands and 94.11% polymorphic) and ubc824 (7 bands and 100% polymorphic), r...
یکی از موضوعات مورد بحث در مسائل بهینه سازی جانمائی مسئله استقرار و تخصیص می باشد. در حالت کلی در این مسئله محل استقرار بهینه و تخصیص بهینه چند خدمت دهنده برای تامین تقاضای چندین مشتری باید تعیین شود. این مسئله به دلیل طبیعت نامحدب آن معمولا دارای بهینه های محلی متعددی بوده و اسنفاده از روشهای دقیق ریاضی به تنهایی برای حل این مسائل بسیار پرهزینه و غیرممکن است . لذا همانگونه که در مقالات تحقیقی ...
This study proposes the model for interpolating time series to use them to forecast effectively for future. This model is established based on the improved fuzzy clustering analysis problem, which is implemented by the Matlab procedure. The proposed model is illustrated by a data set and tested for many other datasets, especially for 3003 series in M3-Competition data. Comparing to the exist...
This paper presents results of hydro-chemical processes controlling groundwater chemical composition, using an integrated application of hierarchical cluster analysis and factor analysis of a major ion data set of groundwater from Mighan playa aquifer. Cluster analysis classified samples into four clusters(A, B, C and D) according to their dominant chemical composition: cluster A (dominant comp...
Applications and curricula of decision analysis currently do not include methods to compute Bayes’ rule and obtain posteriors for non-conjugate prior distributions. The current convention is to force the decision maker’s belief to take the form of a conjugate distribution, leading to a suboptimal decision. BUGS software, which uses MCMCmethods, is numerically capable of obtaining posteriors for...
background: the tan spot disease of wheat caused by pyrenophera tritici-repentis has become a major disease in most wheat growing areas worldwide. objectives: here we used issr and rapd markers to study the genetic diversity of 34 p. tritici-repentis isolates collected from north of iran.materials and methods: the leaves having the typical symptoms of tan spot disease were collected and after f...
objective: flowering time (ft) in cereals controlled by genes that had a main factor on plant development. methods: genetic and phenotypic diversity of four flowering time genes (ft2, ft3, ft4, ppd-h1) in 19 genotypes of cultivated and wild barley was evaluated and a total of 107 alleles were amplified. genotypes based on days to flowering time and molecular data were grouped into early, middle...
background: selecting the correct statistical test and data mining method depends highly on the measurement scale of data, type of variables, and purpose of the analysis. different measurement scales are studied in details and statistical comparison, modeling, and data mining methods are studied based upon using several medical examples. we have presented two ordinal–variables clustering exampl...
abstract for evaluation and identification some of the chamomile species in two genera anthemis and matricaria, morphological and phonological characteristics were used. the experiment was conducted in a randomized completely blocks design (rcbd) with three replicates, sixteen quantitative and qualitative traits were evaluated such as plant height, anthodium diameter, receptacle diameter, ligul...
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