نتایج جستجو برای: input oriented radial measure

تعداد نتایج: 732680  

The efficiency measurement is a subject of great interest. The majority of studies on DEA models have been carried out using radial or non-radial approaches regarding the application of DEA for the efficiency measurement. This paper, based on the directional distance function, proposes a new generalized hybrid measure of efficiency under generalized returns to scale with the existence of both r...

Journal: :shiraz journal of system management 0
m. r. mozaffari department of mathematics, science and research branch, islamic azad university, fars, iran. z. sinaei nasab department of mathematics, science and research branch, islamic azad university, fars, iran. j. gerami department of mathematics, science and research branch, islamic azad university, fars, iran.

in dea to obtain an efficient representation in ccr andbcc models for each dmu only one linear plan would be solved; however,it is possible in centralized resource allocation (cra) to solve allthe dmus by one linear planning. in this paper, models of centralizedresource allocation in input-oriented and in dynamic case will be offeredand by using dynamic sbm, the representation of dmus in each t...

Mehdi Tajdari Saeed Zare Chavoshi

In the present study, five modeling approaches of RA, MLP, MNN, GFF, and CANFIS were applied so as to estimate the radial overcut values in electrochemical drilling process. For these models, four input variables, namely electrolyte concentration, voltage, initial machining gap, and tool feed rate, were selected. The developed models were evaluated in terms of their prediction capability with m...

Journal: :journal of agricultural science and technology 2015
m. zadmirzaei s. mohammadi limaei a. amirteimoori

in this study, the relative performance of mazandaran wood and paper company as a major supplier of paper products in iran was measured. network data envelopment analysis (dea) models with parallel structure were used to evaluate and measure its performance. gams software version 23.4 was used for data analysis. results indicated that this company in all studied years had good performances base...

Journal: :محیط زیست طبیعی 0
حمید سرخیل استادیار، گروه مهندسی محیط زیست، دانشگاه محیط زیست، ایران مهیار حبیبی راد دانشجوی کارشناسی ارشد، مهندسی عمران ـ محیط زیست، دانشگاه محیط زیست، ایران نعمت الله خراسانی استاد، گروه محیط زیست، دانشگاه تهران، ایران

the input-oriented data envelopment analysis was used to measure the water use efficiency and productivity indices of tehran over the period 2005-13. meanwhile, the correlation between water uses and regional economic activities was examined using the gross regional domestic product index. the results indicated that the total productivity was improved 1.8% and 1.68% aspect of technical efficien...

Journal: :JORS 2008
S. C. Ray

Lovell and Rouse (LR) have recently proposed a modification of the standard DEA model that overcomes the infeasibility problem often encountered in computing super-efficiency. In the LR procedure one appropriately scales up the observed input vector (scale down the output vector) of the relevant superefficient firm thereby usually creating its inefficient surrogate. An alternative procedure pro...

2013
S. Daneshvar E. Aziz Afshari

Abstract: Data Envelopment Analysis (DEA) is a mathematical programming method for the assessment of relative efficiency of a set of Decision Making Units (DMUs) that use several inputs to produce several outputs. It measures the efficiency of each Decision Making Unit (DMU) by maximizing the ratio of virtual output to virtual input with the constraint that the ratio does not exceed one for eac...

2004
Trevor Taylor Shlomo Geva

Mapping algorithms commonly use “radial sweeps” of the surrounding environment as input. Producing a sweep is a challenging task for a robot using only vision. With no odometers to measure turn angles, a vision-based robot must have another method to verify rotations. In this paper we propose using the Radial Obstacle Profile (ROP) which gives the radial distance to the nearest obstacle in any ...

Gholamazad, M., Radmehr, Sh., Sanei, M.,

Network nowadays, the main purpose in the models designed by Data Envelopment Analysis (DEA), is to improve the outputs. In this method which is expressed by Khodabakhshi, with an output oriented BCC model, the output increases when the input increases. In this article we will discuss the efficient Decision Making Units (DMUs) in the input oriented BCC model to reduce the input expenses signifi...

Journal: :journal of computational & applied research in mechanical engineering (jcarme) 2015
mehdi tajdari saeed zare chavoshi

in the present study, five modeling approaches of ra, mlp, mnn, gff, and canfis were applied so as to estimate the radial overcut values in electrochemical drilling process. for these models, four input variables, namely electrolyte concentration, voltage, initial machining gap, and tool feed rate, were selected. the developed models were evaluated in terms of their prediction capability with m...

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