نتایج جستجو برای: economic constraint model
تعداد نتایج: 2415631 فیلتر نتایج به سال:
the pupose of this paper is modeling of partial digest problem (pdp) as a mathematical programming problem. in this paper we present a new viewpoint of pdp. we formulate the pdp as a continuous optimization problem and develope a method to solve this problem. finally we constract a linear programming model for the problem with an additional constraint. this later model can be solved by the simp...
This article modifies the conventional two-stage DEA model to construct an analytical model for energy-related efficiency with undesirable outputs. Our proposed model relaxes the constraint that the inputs of the second process must come from the first process. As a result, our proposed model is more flexible than the original model in terms of the application of energy-related efficiency measu...
The resource-constrained project scheduling problem is to find a schedule that minimizes the project duration subject to precedence relations and resource constraints. To further account for economic aspects of the project, one may add an objective of cash nature to the problem. In addition, dynamic nature and variations in real world are known to introduce uncertainties into data. Therefore, t...
In this research, as the main contribution, a comprehensive study is carried out on the mathematical modeling and analysis of the inverse kinematics and dynamics of an over-constraint three translational degree-of-freedom parallel manipulator. Due to the inconsistency between the number of equations and unknowns, the problem of obtaining the constraint forces and torques of an over-constraint m...
this research aims to use var as a risk measure to find the optimum portfolio in tehran stock exchange. in this research var which is calculated with parametric method by using the 15 daily returns of 100 companies from march 21, 2001 to november 22, 2007 was added to the markowitz model of portfolio optimization as additional constraint. by changing the accepted var and accepted confidence lev...
This study applies dynamic programming and numerical methods to an enlarged version of Stoleru’s economic model of Algeria to achieve optimization with respect to the criteria of full employment and balanced growth afterwards while maintaining a minimum per capita consumption. The model is expanded with new influential quantities including a state constraint, a disturbance factor, and an additi...
In many cases economic optimal operation is the same as maximum plant throughput. This corresponds to maximum flow through the bottleneck(s). This insight may greatly simplify implementation and a real-time optimization (RTO) based on a nonlinear model is not necessary. The key issue is to identify the active "bottleneck" constraint and a coordinator MPC based on a linear model with constraints...
Strategic development goals is achieved by investment potential utilization of each region. Some of these goals may be inconsistent. Therefore, Governments want to align a combination of different investment objectives and sometimes contradictory as far as possible. This study aimed to explain the mathematical model for investment projects by providing an integer linear programming model with t...
nowadays in trade and economic issues, prediction is proposed as the most important branch of science. existence of effective variables, caused various sectors of the economic and business executives to prefer having mechanisms which can be used in their decisions. in recent years, several advances have led to various challenges in the science of forecasting. economical managers in various fi...
preventive maintenance scheduling is to perform a series of tasks that prevents or minimizes production breakdowns and improves the reliability. mathematical models have been developed to solve the preventive maintenance scheduling problem. there are several limitations in the prior work in this area of research. craft combinations are assumed to be given. the craft combination problem concerns...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید