نتایج جستجو برای: optimization model

تعداد نتایج: 2340488  

E. Ghandi, M. Nasrolahi, N. Shokrollahi,

This paper presents a Cuckoo Optimization Algorithm (COA) model for the cost optimization of the one-way and two-way reinforced concrete (RC) slabs according to ACI code. The objective function is the total cost of the slabs including the cost of the concrete and that of the reinforcing steel. In this paper, One-way and two-way slabs with various end conditions are formulated as ACI code. The t...

Journal: :international journal of environmental research 0
kh. ashrafi graduate faculty of environment, university of tehran, p.o.box 14155-6135, tehran, iran m. shafiepour graduate faculty of environment, university of tehran, p.o.box 14155-6135, tehran, iran l. ghasemi graduate faculty of environment, university of tehran, p.o.box 14155-6135, tehran, iran b. araabi faculty of electrical and computer engineering, university of tehran, tehran, iran

the objective of this paper is to develop an artificial neural network (ann) model which can beused to predict temperature rise due to climate change in regional scale. in the present work data recorded overyears 1985-2008 have been used at training and testing steps for ann model. the multilayer perceptron(mlp) network architecture is used for this purpose. three applied optimization methods a...

سید اسد اله محسنی موحد, , محمد جواد منعم, ,

Poor performance of irrigation canals and its effect on decreasing of Agricultural water productivity require attention for their improvement. In this paper a new mathematical model is introduced which could present optimal operation considering downstream requirements of turnouts, canal inlet flow, actual constraints and real conditions of canal system. Four performance indicators of delivery ...

Journal: :international journal of information, security and systems management 2014
mohammad ali afshar abbas toloie fateme nazeri

e-learning model is examined of three major dimensions. and each dimension has a range of indicators that is effective in optimization and modeling, in many optimization problems in the modeling, target function or constraints may change over time that as a result optimization of these problems can also be changed. if any of these undetermined events be considered in the optimization process, t...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1390

over the past decades a number of approaches have been applied for forecasting mortality. in 1992, a new method for long-run forecast of the level and age pattern of mortality was published by lee and carter. this method was welcomed by many authors so it was extended through a wider class of generalized, parametric and nonlinear model. this model represents one of the most influential recent d...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2007
hossein abedini mahmoud reza pishvaie ramin bozorgmehry boozarjomehry

for large and complex reacting systems, computational efficiency becomes a critical issue in process simulation, optimization and model-based control. mechanism simplification is often a necessity to improve computational speed. we present a novel approach to simplification of reaction networks that formulates the model reduction problem as an optimization problem and solves it using genetic al...

Journal: :iranian journal of management studies 0
rahman soofifard industrial engineering department, institute for technology development, sharif university of technology, tehran, iran morteza khakzar bafruei industrial engineering department, institute for technology development, sharif university of technology, tehran, iran

in the real world, risk and uncertainty are two natural properties in the implementation of mega projects. most projects fail to achieve the pre-determined objectives due to uncertainty. a linear integer programming optimization model was used in this work to solve a problem in order to choose the most appropriate risk responses for the project risks. a mathematical model, in which work structu...

Constrained optimization problems have a wide range of applications in science, economics, and engineering. In this paper, a neural network model is proposed to solve a class of nonsmooth constrained optimization problems with a nonsmooth convex objective function subject to nonlinear inequality and affine equality constraints. It is a one-layer non-penalty recurrent neural network based on the...

Journal: :iranian journal of science and technology transactions of mechanical engineering 2015
w. z. zhao c. y. wang z. q. zhang

differential steering of in-wheel electric vehicle provides the functions of both active steering and power assisted steering with the coupling control of force and displacement transfer characteristic of system. a collaborative optimization model of the differential power-assisted steering system of in-wheel electric vehicle is built, with steering economy as the main system optimization goal,...

Journal: :international journal of civil engineering 0
sh. afandizadeh zargari r. taromi

optimization is an important methodology for activities in planning and design. the transportation designers are able to introduce better projects when they can save time and cost of travel for project by optimization methods. most of the optimization problems in engineering are more complicated than they can be solved by custom optimization methods. the most common and available methods are he...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید