نتایج جستجو برای: principle components analysis
تعداد نتایج: 3217971 فیلتر نتایج به سال:
Identification and evaluation of indigenous genotypes of fruit trees are matter of consideration at the first step of the breeding programs. In order to study genetic diversity and to identify promising genotypes, 14 different genotypes of walnut in Minoodasht region in Golestan province (north of Iran) were evaluated. Traits such as nut shape, kernel color, ease of removal of kernel halves, ke...
We propose a simple yet efficient feature-selection method — based on principle component analysis (PCA) — for SVM-based classifiers. The idea is to select features whose corresponding axes are closest to the principle components computed from a data distribution by PCA. Experimental results show that our proposed method reduces dimensionality similar to PCA, but maintains the original measurem...
in this paper the nonlinear bending analysis of thick functionally graded plates subjected to mechanical loading is studied. the formulation is derived based on the third-order shear deformation plate theory and von kármán type non-linearity. young’s modulus is assumed to vary according to a power law distribution in terms of the volume fractions of the constituents. the principle of virtual wo...
The common bean is the most important grain legume for direct human consumption in the world and BCMV is one of the world's most serious bean diseases that can reduce yield and quality of harvested product. To determine the best tolerance index to BCMV and recognize tolerant genotypes, 2 experiments were conducted in field conditions. Twenty five common bean genotypes were sown in 2 separate RC...
The common bean is the most important grain legume for direct human consumption in the world and BCMV is one of the world's most serious bean diseases that can reduce yield and quality of harvested product. To determine the best tolerance index to BCMV and recognize tolerant genotypes, 2 experiments were conducted in field conditions. Twenty five common bean genotypes were sown in 2 separate RC...
considering the importance of vegetation changes and awareness of its destruction or improvement trends in programming and its proper managing of utilization, this study was conducted in order to survey the effects of grazing on the qualitative and quantitative components of vegetation (including life form, growth form, palatability class, plant families and species diversity) and recognition t...
In order to investigation of chromosomal variation in various populations of Aegilops cylindrica from northwest of Iran, the karyotype of each populations was prepared using aceto-iron-hematoxilin staining and different chromosomal characteristics were measured. The results showed that the karyotype of these populations consisted of seven pairs of metacentric, three pairs of submetacentric and ...
We solve principle component regression (PCR) by providing an efficient algorithm to project any vector onto the subspace formed by the top principle components of a matrix. Our algorithm does not require any explicit construction of the top principle components, and therefore is suitable for large-scale PCR instances. Specifically, to project onto the subspace formed by principle components wi...
تقسیم بندی الگوی بارش در استان فارس، بوشهر و کهگیلویه و بویر احمد با استفاده از روش تحلیل مولفه اصلی
مطالعه توزیع جغرافیایی بارندگی به جهت استفاده وسیع آن در کشاورزی، منابع آب، صنعت، توریسم، احداث و بهره برداری از سدها و نیز علم آبیاری حائز اهمیت می باشد. با استفاده از روش آماری مولفه اصلی principal component analysis, oca)) که در مطالعات هوا و اقلیم شناسی کاربد وسیعیدارد می توان داده های اقلیمی نظیر بارندگی در یک گسترده وسیع جغرافیایی را پهنه بندی کرده و نسبت به کاهش حجم داده ها اقدام نمو...
in this research the focus of the researcher is on the influence of american myths that have long been held and offered by the american culture and ideologies. sam shepard is conceived to be one of the greatest playwrights of the contemporary american theater. in his works he depicts broken characters who are struggling to keep up with the national expectations but are ceaselessly borne back to...
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