نتایج جستجو برای: matrix analysis

تعداد نتایج: 3097370  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده مهندسی 1387

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...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1389

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...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده شیمی 1389

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...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده ریاضی 1389

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 ...

Journal: :international journal of data envelopment analysis 0
k. kianfar m. ahadzadeh namin a. alam tabriz e. najafi f. hosseinzadeh lotfi

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...

Journal: :نظریه تقریب و کاربرد های آن 0
farhad hosseinzadeh-lotfi department of mathematics, islamic azad university, science and research branch, tehran, iran. mohammad izadikhah department of mathematics, islamic azad university, arak branch, arak branch, iran. r. roostaee department of mathematics, islamic azad university, arak branch, arak branch, iran. mohsen rostamy-malkhalifeh department of mathematics, islamic azad university, science and research branch, tehran, iran.

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.

Journal: :اقتصاد و توسعه کشاورزی 0

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...

Journal: :iranian journal of allergy, asthma and immunology 0
wen-liang fang central laboratory of clinical college, anhui medical university, hefei 230601, p. r. china and department of forensic biology, west china school of preclinical and forensic medicine, sichuan university, chengdu 610041, p. r. china wei-bo liang department of forensic biology, west china school of preclinical and forensic medicine, sichuan university, chengdu 610041, p. r. china lin-bo gao laboratory of molecular translational medicine, west china second university hospital, sichuan university, chengdu 610041, p. r. china bin zhou laboratory of molecular translational medicine, west china second university hospital, sichuan university, chengdu 610041, p. r. china feng-li xiao central laboratory of clinical college, anhui medical university, hefei 230601, p. r. china lin zhang department of forensic biology, west china school of preclinical and forensic medicine, sichuan university, chengdu 610041, p. r. china and laboratory of molecular translational medicine, west china second university hospital, sichuan university, chengdu 610041, p. r. china

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...

Journal: :computational methods in civil engineering 2013
r. khajavi

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 ...

Journal: :international journal of agricultural management and development 2015
roya eshraghi samani alireza poursaeed

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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