نتایج جستجو برای: matrix analysis
تعداد نتایج: 3097370 فیلتر نتایج به سال:
abstract this paper discusses several commonly used models for strategic marketing¹ including market environmental analysis methods (i.e. swot and pest analysis) and strategic marketing tools and techniques (i.e. boston matrix and shell directional policy matrix)and shows how these models may help a firm to achieve its strategic goals. at first, the main reason for doing this research is de...
in reality, most structures involved in geotechnical engineering are three dimensional in nature, and although in many, plane strain or axisymmetric approximations are reasonable, there are some, for which 3-d treatment is required. the quantity of data, and the size of the various vectors and matrices involved in such analysis, increase dramatically. this has sever implications for computer r...
in this thesis, a new optically active poly(amide-imide) (pai) was synthesized by the indirect polycondensation reaction of the l-phenylalanine based diacid chloride and 4,4?-diaminodiphenylether in the presence of triethylamine in n-methyl-2-pyrrolidone. the formation of pai was confirmed by ftir, 1h nmr and elemental analysis. in next step, the surface of titanium dioxide (tio2) nanoparticles...
one of the most important number sequences in mathematics is fibonacci sequence. fibonacci sequence except for mathematics is applied to other branches of science such as physics and arts. in fact, between anesthetics and this sequence there exists a wonderful relation. fibonacci sequence has an importance characteristic which is the golden number. in this thesis, the golden number is observed ...
data envelope analysis (dea) is an approach to estimate the relative efficiency of decision making units (dmus). several studies were conducted in order to prioritize efficient units and some useful models such as cross-efficiency matrix (cem) were presented. besides, a number of dea models with interval data have been developed and ranking dmus with such data was solved. however, presenting a...
this research proposes a methodology for ranking decision making units byusing a goal programming model.we suggest a two phases procedure. in phase1, by using some dea problems for each pair of units, we construct a pairwisecomparison matrix. then this matrix is utilized to rank the units via the goalprogramming model.
abstract comparative advantage is one of the important economic criterions in production, import and export programming. in this survey, existence and nonexistence of the most important vegetables(potato, cucumber and tomato) comparative advantage in jiroft aria in the year 1385-86 by use of two comparative advantage recognition indexes was determined. the first indexes were social cost benefit...
matrix metalloproteinases (mmps) play an important role in gastric cancer (gc). accumulated evidence suggests that functional mmp-1 and mmp-7 gene polymorphisms are associated with several tumors. the aim of this study was to investigate two single nucleotide polymorphisms, mmp-1 -1607 1g/2g and mmp-7 -181 a/g, and their potential relationship with gc. we examined 246 gc patients and 252 age-a...
for the nonlinear analysis of structures using the well known newton-raphson method, the tangent stiffness matrices of the elements must be constructed in each iteration. due to the high expense required to find the exact tangent stiffness matrices, researchers have developed novel innovations into the newton-raphson method to reduce the cost and time required by the analysis. in this paper, a ...
in this study, the comparative advantage of main agricultural products and its relation to cropping pattern was studied in ilam province. for data analyzing the comparative advantage and government policies effects indices, policy analysis matrix (pam) were used. the obtained results for the comparative advantage indices of domestic resource cost (drc), social cost benefit (scb) and net social ...
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